CN101532855B - Wedge shape pore plate flow measurement device with whole tungsten carbide material - Google Patents

Wedge shape pore plate flow measurement device with whole tungsten carbide material Download PDF

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Publication number
CN101532855B
CN101532855B CN 200910136026 CN200910136026A CN101532855B CN 101532855 B CN101532855 B CN 101532855B CN 200910136026 CN200910136026 CN 200910136026 CN 200910136026 A CN200910136026 A CN 200910136026A CN 101532855 B CN101532855 B CN 101532855B
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China
Prior art keywords
pore plate
wedge shape
wedge
tungsten carbide
shape pore
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Expired - Fee Related
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CN 200910136026
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Chinese (zh)
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CN101532855A (en
Inventor
王政
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TIANJIN WANXI INSTRUMENT CO Ltd
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TIANJIN WANXI INSTRUMENT CO Ltd
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Priority to CN 200910136026 priority Critical patent/CN101532855B/en
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Publication of CN101532855B publication Critical patent/CN101532855B/en
Expired - Fee Related legal-status Critical Current
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Abstract

The invention provides a wedge shape pore plate flow measurement device with whole tungsten carbide material which is composed of a measurement pipe, a pressure tapping subassembly and a wedge shape pore plate. The wedge shape pore plate uses tungsten carbide material whole sintering and grinding for forming; the measurement pipe wall is coated with tungsten carbide layer, and a wedge port fitted with the wedge pore plate is opened on the measurement pipe, the wedge shape pore plate is tight pressed in the wedge port through a pressing device. The device has advantages and active effects as follows: 1. the whole tungsten carbide plate uses the tungsten carbide material whole sintering and grinding for forming which can ensure accurate and consistency of geometric molded line ensures measurement accuracy and increases working life. 2. a structure of the tungsten carbide wedge shape plate fixing with the measurement pipe can ensure measurement reliability in high pressure and high flow speed. 3. the product has better consistency which is replaceable and is convenient for realizing standard mass production.

Description

Wedge shape pore plate flow measurement device with whole tungsten carbide material
Technical field:
The invention belongs to a kind of restriction device, particularly a kind of Wedge shape pore plate flow measurement device with whole tungsten carbide material.
Background technology:
Wedge shape pore plate flow measurement device (hereinafter to be referred as Wedge device), it is a kind of novel throttling device that the eighties begins to use, identical with the function that with the standard orifice plate is throttling devices such as restricting element, all be the pressure reduction and the particular kind of relationship of flow that utilizes fluid to flow through to produce before and after the restricting element, carry out flow measurement through making up with differential pressure transmitter.Wedge device is made up of measuring tube, pressure assembly and Wedge shape pore plate.Wherein: the measuring sensor Wedge shape pore plate be shaped as the slick and sly drift angle of cross section triangularity wedge down so that contain the liquid of suspended particle or thick liquid smoothly by throttling element, avoid producing at upstream side and remain in a standstill.Pressure port is located on the measuring tube, be convenient to and being connected of flange form pressure transducer, therefore can be used for as pulpous state fluid, sewage, Heisui River, buck, etc. the flow measurement of high pressure, high-temperature medium, at home and abroad be widely used in especially in recent years methyl alcohol of oil, chemical industry, acetic acid, the coal oil refining project.But because the singularity of process fluid, the part often will be destroyed after short-term is used before and after a fluid stream contracted section in Wedge shape pore plate surface and the measuring tube, cause measuring the cross section when a fluid stream molded lines irregular variation takes place, thereby it is inestimable to cause that coefficient of flow changes, reduced the accuracy of flow measurement, cause the undesirable and weak point in serviceable life (according to user's reflection, some device only uses 1-2 just need change when flow velocity is big) of production process technology parameter control.
At present, both at home and abroad in the existing product, be divided into by the assembly structure design of Wedge shape pore plate and measuring tube: weld board-like and bolt lift-on/lift-off type.Wherein:
A) as shown in Figure 3: weld board-likely, namely directly open the wedge mouth at measuring tube, be welded on the measuring tube to form wedge geometry with baffle plate.Its weak point is:
1. because the form of this class formation is limit, its working pressure only is confined to 6.4MPa or littler.
[notes]: the duty parameter commonly used of Wedge shape pore plate: medium: Heisui River, buck etc. contains small solid-liquid, working pressure: about 9.0MPa, and working temperature: between 240 ℃-300 ℃.
2. since welding deformation can not determine factor, the geometric configuration of wedge shape is irregular, consistance is poor, and assembly welding position, wedge (baffle plate) and measuring tube welding back welding bead be difficult to revise, no matter cause timing signal still in use in the instability of efflux coefficient, measuring accuracy can only reach 2.0%-4.0% even lower, can't be used for the flow measurement that degree of precision requires.
3. can't realize coated with hard alloy (tungsten carbide).
B) as shown in Figure 4: bolt matable, i.e. processing screw hole on whole Wedge shape pore plate, measuring tube processing via hole, Wedge shape pore plate is inserted in the measuring tube, outside measuring tube, bolt 8 is inserted in the pre-processed screw of wedge, by the lifting of screw thread wedge being sling is fixed in the measuring tube, and weld pipe exposes outside bolt then.This form can realize inner-walls of duct and wedge surface sprayed wc powder.
Its weak point is:
1. because spraying coating process limits and the result of following process, and coating thickness only is 0.1-0.3mm, under the situation out of the ordinary, coating shedding phenomenon was in use also taken place in the processing defective before the wedge spraying.Even if selected for use high abrasion resisting material " tungsten carbide " still to be difficult to a difficult problem that guarantees that coating is not abraded under fluid washes away for a long time like this, can't guarantee the precision of flow measurement and the serviceable life of device.
2. the fixed sturcture poor reliability of wedge and measuring tube, wedge are easily loosening, even come off.The diameter of bolt of stationary wedge piece and be screwed into length and be subjected to the angle restriction of wedge to be limited in smaller value, during use, bolt bears shearing force and bolt self for a long time in pipeline plastic yield (weight of wedge and from the impulse force of fluid) make wedge and tube wall the gap increase and can't be fastening again.When piping has vibrations or during misoperation and easily make bolt fracture, cause wedge to come off and can't measure, what is more the wedge damage upstream device that is crashed to pieces.
3. this fixed sturcture makes assembly process process poor, uncontrollable and check wedge and measuring tube to assemble morpheme error, even if also be difficult to reach the consistance of voussoir and the geometric configuration of measuring tube formation after the assembling of the identical product of specification, therefore, the efflux coefficient of wedge shape flowmeter must be decided by real the failing to be sold at auction of platform, the product non-interchangeability can't be realized standardization.
Summary of the invention:
Purpose of the present invention just is to overcome above-mentioned the deficiencies in the prior art, and a kind of Wedge shape pore plate flow measurement device with whole tungsten carbide material is provided, the measuring accuracy height of this device, long service life, and can realize the standardization batch process.
Technical scheme of the present invention is: a kind of Wedge shape pore plate flow measurement device with whole tungsten carbide material, formed by measuring tube, pressure assembly and Wedge shape pore plate, wherein: Wedge shape pore plate be shaped as a cross section drift angle triangular in shape wedge down; It is characterized in that: Wedge shape pore plate adopts the integral sintered back of tungsten carbide material grinding forming; Sprayed wc layer on the tube wall of measuring tube, and have the wedge mouth that matches with the Wedge shape pore plate shape at measuring tube, Wedge shape pore plate is pressed in this wedge mouth by hold down gag.
Above-mentioned hold down gag is hold-down bolt, and this hold-down bolt is pressed on Wedge shape pore plate in the wedge mouth.
Be set with sleeve pipe on the above-mentioned Wedge shape pore plate.
The present invention has following advantage and good effect:
1, the whole tungsten carbide orifice plate has adopted the integral sintered back of tungsten carbide material grinding forming, guarantee the accurate and consistance of how much molded lines, the hardness of tungsten carbide and wearing quality can be resisted fluid scouring and abrasion (the tungsten carbide orifice plate can be higher than pipeline life serviceable life) fully in addition, how much molded lines of Wedge shape pore plate are not subjected to operating mode to influence variation, reach the stable of efflux coefficient, guarantee accuracy of measurement, improved serviceable life.
2, the fixing structure of tungsten carbide Wedge shape pore plate and measuring tube can be guaranteed to measure the reliability of using in high pressure, high flow rate working medium.This fixed sturcture with the deadweight of voussoir in addition the roof pressure of bolt wedge is pressed in the wedge mouth of measuring tube preprocessing, sleeve pipe is used for the fixing and sealing of auxiliary voussoir, thus, this structure guarantees that the dependability of high pressure, big flow rates of fluid operating mode has made things convenient for assembling simultaneously.
3, good product consistency, interchangeable, be convenient to realize the standardization batch process.The design of said structure has reduced the tolerance clearance of wedge mouth and voussoir, and the geometric configuration that assembling back wedge and measuring tube form reaches unanimity, and is convenient to the interchangeability of accumulation coefficient and same specification caliber voussoir and realizes the standardization batch process.
Description of drawings:
Fig. 1 is structural representation of the present invention.
Fig. 2 is the schematic internal view of measuring tube of the present invention.
Fig. 3 is the structural representation of the board-like Wedge shape pore plate flow measurement device of weldering.
Fig. 4 is the structural representation of bolt fastening Wedge shape pore plate flow measurement device.
Embodiment:
A kind of Wedge shape pore plate flow measurement device with whole tungsten carbide material is made up of measuring tube 1, pressure assembly 2 and Wedge shape pore plate 5.Wherein: Wedge shape pore plate be shaped as a cross section slick and sly drift angle triangular in shape wedge down.Wedge shape pore plate adopts the integral sintered back of tungsten carbide material grinding forming; Sprayed wc layer 6 on the tube wall of measuring tube, and have the wedge mouth 7 that matches with the Wedge shape pore plate shape at measuring tube, Wedge shape pore plate is pressed on Wedge shape pore plate in the wedge mouth by hold-down bolt 4.Be set with sleeve pipe 3 on the above-mentioned Wedge shape pore plate, this sleeve pipe is used for the fixing and sealing of auxiliary voussoir.

Claims (3)

1. a Wedge shape pore plate flow measurement device with whole tungsten carbide material is made up of measuring tube, pressure assembly and Wedge shape pore plate, wherein: Wedge shape pore plate be shaped as a cross section drift angle triangular in shape wedge down; It is characterized in that: Wedge shape pore plate adopts the integral sintered back of tungsten carbide material grinding forming; Sprayed wc layer on the tube wall of measuring tube, and have the wedge mouth that matches with the Wedge shape pore plate shape at measuring tube, Wedge shape pore plate is pressed in this wedge mouth by hold down gag.
2. Wedge shape pore plate flow measurement device with whole tungsten carbide material according to claim 1, it is characterized in that: above-mentioned hold down gag is hold-down bolt, and this hold-down bolt is pressed on Wedge shape pore plate in the wedge mouth.
3. Wedge shape pore plate flow measurement device with whole tungsten carbide material according to claim 1 is characterized in that: be set with sleeve pipe on the above-mentioned Wedge shape pore plate.
CN 200910136026 2009-04-24 2009-04-24 Wedge shape pore plate flow measurement device with whole tungsten carbide material Expired - Fee Related CN101532855B (en)

Priority Applications (1)

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CN 200910136026 CN101532855B (en) 2009-04-24 2009-04-24 Wedge shape pore plate flow measurement device with whole tungsten carbide material

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Application Number Priority Date Filing Date Title
CN 200910136026 CN101532855B (en) 2009-04-24 2009-04-24 Wedge shape pore plate flow measurement device with whole tungsten carbide material

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CN101532855A CN101532855A (en) 2009-09-16
CN101532855B true CN101532855B (en) 2013-08-21

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Families Citing this family (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN104977050A (en) * 2015-07-17 2015-10-14 卢玖庆 Variable flow wedge shaped flowmeter
CN111379532A (en) * 2018-12-29 2020-07-07 中国石油大学(华东) Flow monitoring device and drilling equipment

Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721577A (en) * 1966-09-23 1973-03-20 Teeg Research Inc Process for the deposition of refractory metal and metalloid carbides on a base material
CN1924047A (en) * 2006-09-20 2007-03-07 谭日善 Method of preparing ultra-fine hard alloy mixture of tungsten and cobalt and product
CN201100444Y (en) * 2007-09-15 2008-08-13 吴万江 Ball valve with metal hard sealing body valve base
CN201408035Y (en) * 2009-04-24 2010-02-17 天津市万禧仪器仪表有限公司 Flow measuring device used for wedge-shaped pore plate entirely made of carbonized tungsten material

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
US3721577A (en) * 1966-09-23 1973-03-20 Teeg Research Inc Process for the deposition of refractory metal and metalloid carbides on a base material
CN1924047A (en) * 2006-09-20 2007-03-07 谭日善 Method of preparing ultra-fine hard alloy mixture of tungsten and cobalt and product
CN201100444Y (en) * 2007-09-15 2008-08-13 吴万江 Ball valve with metal hard sealing body valve base
CN201408035Y (en) * 2009-04-24 2010-02-17 天津市万禧仪器仪表有限公司 Flow measuring device used for wedge-shaped pore plate entirely made of carbonized tungsten material

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