CN210741575U

CN210741575U - Corrosion-resistant anti-blocking RD wedge-shaped flowmeter

Info

Publication number: CN210741575U
Application number: CN201922144702.8U
Authority: CN
Inventors: 杨宏伟; 王乐
Original assignee: Anwei Electromechanical Equipment Manufacturing Shanghai Co Ltd
Current assignee: Anwei Electromechanical Equipment Manufacturing Shanghai Co Ltd
Priority date: 2019-12-02
Filing date: 2019-12-02
Publication date: 2020-06-12
Anticipated expiration: 2029-12-02

Abstract

The utility model relates to a corrosion-resistant anti-blocking type RD wedge-shaped flowmeter, which comprises a flow tube, wherein the outer peripheral surface of the flow tube is provided with two connecting pipes along the length direction, the connecting pipes are mutually communicated with the inside of the flow tube, and the end part of each connecting pipe, which is far away from the flow tube, is provided with a pressure gauge; an inner sleeve which can contain fluid and reduce the corrosion of the flow tube by the fluid is inserted in the flow tube, and a wedge-shaped throttling piece used for throttling the fluid is connected in the inner sleeve in a sliding manner; an annular sliding groove is coaxially formed in the inner peripheral surface of the inner sleeve, one end of the sliding groove is communicated with the outside of the flow tube, the other end of the sliding groove is located between the two connecting tubes, a sliding tube is fixedly connected to the outer side of the wedge-shaped throttling piece, and a fixing assembly which is used for pushing the sliding tube to be fixed is further arranged in the sliding groove. The utility model discloses have the effect of being convenient for dredge inside the flowmeter.

Description

Corrosion-resistant anti-blocking RD wedge-shaped flowmeter

Technical Field

The utility model belongs to the technical field of fluid measurement's technique and specifically relates to a corrosion-resistant anti-blocking type RD wedge-shaped flowmeter is related to.

Background

The wedge-shaped flowmeter is a differential pressure type flow meter, has the same measurement principle as other differential pressure type flow meters, and is a flow measurement method based on a Bernoulli equation and a flow continuity equation. The traditional differential pressure type instrument changes the mode of throttling in the center of a pipeline, and a wedge-shaped throttling device is added into the pipeline instead.

The detection piece of the wedge-shaped throttling device is a wedge-shaped body, the wedge-shaped body is a wedge-shaped throttling piece, the smooth top angle of the wedge-shaped throttling piece faces downwards, and the pressure of fluid is changed after the fluid is blocked and throttled by the throttling piece, so that the flow of the fluid can be calculated by measuring the pressure difference of the fluid before and after the fluid passes through the throttling piece and by using a Bernoulli equation. It can measure gas, liquid and steam, and is suitable for measuring high-viscosity fluid and dirty fluid, and when the viscosity is up to 500MPa.s, it can still make high-precision measurement. The method is widely measured in industries such as petrifaction, steel, oil refining and the like.

In some special industries and special fluid measurement, because the throttling element has a blocking effect on the flow of the fluid, suspended particles or viscous liquid in the fluid may be accumulated in a gap between the throttling element and the pipeline, so that the flowmeter is blocked, and the measurement result is influenced.

SUMMERY OF THE UTILITY MODEL

Not enough to prior art exists, the utility model aims at providing a corrosion-resistant anti-blocking type RD wedge flowmeter, it has the effect of being convenient for dredge inside the flowmeter.

The above utility model discloses an above-mentioned utility model's purpose can be realized through following technical scheme:

the anti-corrosion anti-blocking type RD wedge-shaped flowmeter comprises a flow tube, wherein two connecting tubes are arranged on the outer peripheral surface of the flow tube along the length direction of the flow tube, the connecting tubes are communicated with the inside of the flow tube, and a pressure gauge is arranged at the end part, far away from the flow tube, of each connecting tube; an inner sleeve which can contain fluid and reduce the corrosion of the flow tube by the fluid is inserted in the flow tube, and a wedge-shaped throttling piece used for throttling the fluid is connected in the inner sleeve in a sliding manner;

the inner peripheral surface of interior sleeve pipe is seted up an annular groove that slides coaxially to the one end in groove that slides and the outside of flow tube communicate each other, and the other end in groove that slides is located between two connecting pipes, wedge throttling element outside rigid coupling has one with slide the groove cooperation pipe that slides, slide the inslot still be provided with one and push up the fixed subassembly that slides the pipe and then will slide the pipe and fix.

By adopting the technical scheme, when fluid passes through the interior of the flow tube, the fluid is limited by the wedge-shaped throttling element, so that the pressure of the fluid is changed, the pressure change condition of the fluid at two sides of the wedge-shaped throttling element can be measured, the flow of the fluid in the flow tube can be calculated according to the relation between the pressure difference and the flow in the Bernoulli equation, when the corrosion-resistant anti-blocking type RD wedge-shaped flowmeter is used for a long time, suspended impurities in the fluid can be possibly accumulated in a gap between the wedge-shaped throttling element and the flow tube, so that the reading accuracy of the wedge-shaped flowmeter is influenced, at the moment, a worker can remove the corrosion-resistant anti-blocking type RD wedge-shaped flowmeter from a measured pipeline and take out the fixed component and the wedge-shaped throttling element from the sliding groove in sequence, the cleaning of the interior of the wedge-shaped throttling element and the interior of the flow tube by the worker is facilitated, so that, thereby prolonging the service life of the anti-corrosion anti-blocking type RD wedge-shaped flowmeter, saving the cost and reducing the waste. The fluid circulates from the inner sleeve, so that the direct contact between the fluid and the flow tube is avoided, the corrosion of the fluid to the flow tube is reduced, and the service life of the corrosion-resistant anti-blocking RD wedge-shaped flowmeter is further prolonged.

The present invention may be further configured in a preferred embodiment as: the end part of the inner sleeve is flush with the end part of the flow tube, one end of the flow tube, which is close to the sliding groove, is fixedly connected with a first flange which is mutually fixed with the pipeline to be measured, one end of the flow tube, which is far away from the sliding groove, is fixedly connected with a second flange, and the first flange and the second flange are mutually abutted with the end surface of the inner sleeve so as to fix the inner sleeve inside the flow tube.

Through adopting above-mentioned technical scheme, the setting of first flange and second flange has improved corrosion-resistant anti-blocking type RD wedge flowmeter and the fixed convenience of measured pipeline on the one hand, and on the other hand, first flange and second flange press from both sides the interior sleeve pipe and establish and fix in the flow tube to corrosion-resistant anti-blocking type RD wedge flowmeter during operation's stability has been improved.

The present invention may be further configured in a preferred embodiment as: the fixed component comprises a limiting pipe which is inserted in the sliding groove and is abutted against the end part of the sliding pipe, and one end of the limiting pipe, which is away from the sliding pipe, is fixedly connected with a fixed flange which is attached to the first flange plate.

Through adopting above-mentioned technical scheme, thereby fixed subassembly touches wedge throttling element top and fixes the stability that has improved wedge throttling element during operation at the tip in groove that slides to spacing pipe can fill the spacing groove, thereby has reduced because the spacing groove leads to the interior cross-section grow of flow tube, and then the unsafe condition of corrosion-resistant anti-blocking type RD wedge flowmeter reading.

The present invention may be further configured in a preferred embodiment as: a holding tank has been seted up towards mounting flange's one side to first ring flange, mounting flange is located the holding tank.

Through adopting above-mentioned technical scheme, touch fixed back with wedge throttling element top when fixed subassembly, mounting flange lies in the holding tank and pastes each other with the holding tank and lean on, and the staff can be with first flange and the flange interconnect of being surveyed the pipeline this moment to mounting flange is spacing in the holding tank, and then has improved the stability that wedge throttling element and interior sleeve pipe are fixed.

The present invention may be further configured in a preferred embodiment as: the sliding groove is also internally provided with a limiting groove, and a limiting block matched with the limiting groove is fixedly connected to the peripheral surface of the corresponding sliding pipe.

Through adopting above-mentioned technical scheme, spacing groove and stopper spacing each other to restricted the pipe that slides and the mutual rotation in groove that slides, and then fixed wedge throttling element and interior sheathed tube position each other, thereby reduced because fluid impact wedge throttling element, thereby lead to the condition of wedge throttling element including the inside rotation of sleeve pipe and influence measurement accuracy.

The present invention may be further configured in a preferred embodiment as: two limiting grooves are formed, and two corresponding limiting blocks are arranged.

By adopting the technical scheme, the stability of the sliding rod and the inner sleeve pipe when being clamped with each other is further improved due to the arrangement of the two limiting blocks; and when one limiting block is damaged, the other limiting block can still keep the clamping effect on the sliding pipe.

The present invention may be further configured in a preferred embodiment as: and the surface of the wedge-shaped throttling piece is provided with a corrosion-resistant coating.

Through adopting above-mentioned technical scheme, corrosion resistant coating can protect wedge throttling element to thereby it is corroded by the fluid thereby to have reduced wedge throttling element and has influenced the throttle effect and then influence the condition of pressure gauge reading accuracy

The present invention may be further configured in a preferred embodiment as: the corrosion-resistant coating is a polytetrafluoroethylene coating.

By adopting the technical scheme, the polytetrafluoroethylene has stable chemical properties and is not easy to react with most solvents, so that parts can be protected, and the service life of the wedge-shaped throttling element is further prolonged.

To sum up, the utility model discloses a following at least one useful technological effect:

1. the convenience of dredging the interior of the corrosion-resistant anti-blocking RD wedge-shaped flowmeter by workers is improved; through the detachable arrangement of the wedge-shaped throttling element and the inner sleeve, workers can conveniently clean and maintain the inner sleeve and the wedge-shaped throttling element, so that the service life of the corrosion-resistant anti-blocking RD wedge-shaped flowmeter is prolonged;

2. the corrosion resistance of the corrosion-resistant anti-blocking RD wedge-shaped flowmeter is improved, and the inner sleeve made of polytetrafluoroethylene and the corrosion-resistant coating on the surface of the wedge-shaped throttling element are used, so that the flow tube body is not in contact with corrosive fluid, and the condition that the flow tube and the wedge-shaped flow element are corroded by the fluid to influence use is reduced.

Drawings

FIG. 1 is a schematic diagram of the overall structure of a corrosion-resistant and anti-blocking type RD wedge-shaped flowmeter;

FIG. 2 is a cross-sectional view of an internal structure of a corrosion-resistant and anti-blocking RD wedge-shaped flowmeter;

fig. 3 is an exploded view showing the connection relationship between the slide rod and the fixed component.

In the figure, 1, a flow tube; 11. a connecting pipe; 12. a pressure gauge; 13. a first flange plate; 131. accommodating grooves; 14. a second flange plate; 2. an inner sleeve; 21. a sliding groove; 22. a limiting groove; 3. a wedge-shaped orifice; 31. a slipping pipe; 32. a limiting block; 4. a fixing assembly; 41. a limiting pipe; 411. a limiting strip; 42. a fixed flange; 43. connecting holes; 5. and (7) a rubber pad.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Referring to fig. 1 and 2, for the utility model discloses a corrosion-resistant anti-blocking type RD wedge flowmeter, including flow tube 1, flow tube 1 is inside to be inserted and to be equipped with the interior sleeve pipe 2 of a polytetrafluoroethylene material, and interior sleeve pipe 2's external diameter equals flow tube 1's internal diameter to make the outer peripheral face of interior sleeve pipe 2 and flow tube 1's inner peripheral surface paste each other and lean on. Two connecting pipes 11 are fixedly connected to the outer peripheral surface of the flow tube 1 along the length direction of the flow tube 1, the center lines of the connecting pipes 11 are perpendicular to the center line of the flow tube 1, the two connecting pipes 11 are located on the same side of the flow tube 1, and the connecting pipes 11 are communicated with the inner space of the inner sleeve 2. A pressure gauge 12 is attached to the end of the connecting tube 11 remote from the flow tube 1. The inner peripheral surface of the inner sleeve 2 is also provided with a wedge-shaped throttling element 3, and a throttling gap is formed between the end angle of the wedge-shaped throttling element 3 and the inner peripheral surface of the flow tube 1. The end angle of the wedge-shaped orifice 3 is set away from the connecting piece 11 so that the orifice gap is on the side of the flow tube 1 away from the connecting piece 11.

When fluid passes through the flow tube 1, the fluid is blocked by the wedge-shaped throttling element 3 and passes through the throttling gap, so that the flow velocity of the fluid is increased, the pressure is reduced, the pressure drop of the fluid is read through the mutual cooperation of the pressure gauges 12 on the connecting tubes 11 on two sides of the wedge-shaped flowmeter, and the flow of the fluid passing through the inner sleeve 2 is calculated through the relation between the pressure difference and the flow in the Bernoulli equation. Because the inner sleeve 2 is made of polytetrafluoroethylene, the material has the characteristics of acid resistance, alkali resistance and various organic solvents resistance, and is almost insoluble in all solvents. Therefore, the corrosion-resistant anti-blocking type RD wedge-shaped flowmeter has corrosion resistance.

As shown in fig. 2 and 3, a first flange 13 and a second flange 14, which are mutually communicated with the pipeline to be measured, are respectively fixedly connected to two ends of the flow tube 1, and the first flange 13 and the second flange 14 are both abutted against the end of the inner sleeve and mutually clamped with the inner sleeve 2, so that the inner sleeve 2 is fixed on the flow tube 1. An annular sliding groove 21 is coaxially formed in the inner peripheral surface of the inner sleeve 2, one end of the sliding groove 21 is communicated with the outside of one end, fixedly connected with a first flange, of the flow tube 1, and the other end of the sliding groove 21 is located in the middle of the two connecting tubes 11. A sliding pipe 31 is connected in the sliding groove 21 in a sliding manner, the outer diameter of the sliding pipe 31 is equal to the inner diameter of the sliding groove 21, so that the sliding pipe 31 can slide in the sliding groove 21, and the wedge-shaped throttling member 3 is fixedly connected to the inner circumferential surface of the sliding pipe 31 and can slide in the sliding groove 21 along with the sliding pipe 31. Still be provided with a fixed subassembly 4 that is used for fixed pipe 31 that slides in the groove 21 that slides, fixed subassembly 4 is including sliding the spacing pipe 41 of connection in the groove 21 that slides, and the external diameter of spacing pipe 41 is the same with the internal diameter of groove 21 that slides, and the one end top of spacing pipe 41 touches the pipe 31 tip that slides that is located the groove 21 that slides, and the other end stretches out the groove 21 that slides and coaxial rigid coupling has a mounting flange 42. When the limiting pipe 41 is inserted into the limiting groove 22 and is mutually abutted with the sliding rod, a connecting hole 43 is further formed in the limiting pipe 41, and the connecting hole 43 and the connecting pipe 11 are coaxially arranged, so that the connecting pipe 11 and the inside of the limiting pipe 41 are mutually communicated. An accommodating groove 131 for accommodating the fixing flange 42 is coaxially formed in the end face of the first flange 13, and the thickness of the fixing flange 42 is equal to the depth of the accommodating groove 131; and when the limiting pipe 41 pushes the sliding pipe 31 against the end of the sliding groove 21, the fixing flange 42 abuts against the bottom wall of the accommodating groove 131, and at this time, the surface of the fixing flange 42 away from the limiting pipe 41 is flush with the surface of the first flange 13 away from the second flange 14. When the first flange 13 is connected to the flange of the pipeline under test, the fixing flange 42 is fixed in the receiving groove 131 by abutting, thereby fixing the position of the slide pipe 31. The aforesaid pipe 31 that slides, the internal diameter of spacing pipe 41 equals the internal diameter of inner skleeve to sleeve pipe 2 in making, the pipe 31 that slides, the interior wall connection of spacing pipe 41 is more level and smooth, has reduced fluid through the inner skleeve with the pipe 31 that slides, and the rivers of junction are undulant between the pipe 31 that slides and the spacing pipe 41, and then have improved the accuracy of a corrosion-resistant anti-blocking type RD wedge flowmeter when measuring fluid. The two ends of the anti-corrosion anti-blocking type RD wedge-shaped flowmeter are respectively provided with a rubber pad 5, and when the anti-corrosion anti-blocking type RD wedge-shaped flowmeter is connected with a flange of a measured pipeline, the rubber pads 5 are extruded, so that the sealing performance of the anti-corrosion anti-blocking type RD wedge-shaped flowmeter and the measured pipeline is improved.

As shown in fig. 2 and 3, a limiting groove 22 is further formed in the inner sleeve 2, the limiting groove 22 is communicated with the inside of the inner sleeve 2, and the length direction of the limiting groove 22 is parallel to the axis of the inner sleeve 2. The outer peripheral face rigid coupling that corresponds pipe 31 that slides has one and spacing groove 22 stopper 32 of mutually supporting, when the pipe 31 that slides in the groove 21 that slides, stopper 32 slides in spacing groove 22 to stopper 32 and spacing groove 22's lateral wall screens of contradicting each other, thereby restricted the rotation of pipe 31 in the groove 21 that slides, wedge throttle 3 and the space between the slide bar are located the one side that deviates from connecting pipe 11 this moment. Through spacing each other of spacing groove 22 and stopper 32 to restricted the mutual rotation of pipe 31 and the groove 21 that slides, and then fixed wedge throttling element 3 and interior sleeve pipe 2's position each other, thereby reduced because fluid impact wedge throttling element 3, thereby leaded to the inside condition of rotating and influence measurement accuracy of wedge throttling element 3 including inside sleeve pipe 2. The two limiting blocks 32 are evenly distributed on the outer peripheral surface of the sliding pipe 31, the two limiting blocks 32 are also arranged corresponding to the mutually matched limiting grooves 22 and the two limiting blocks 32, and the stability of the sliding rod and the inner sleeve 2 when being clamped with each other is further improved through the arrangement of the two limiting blocks 32; and when one stopper 32 is damaged, the other stopper 32 can still maintain the clamping effect on the sliding pipe 31. The outer peripheral face rigid coupling of spacing pipe 41 has the spacing 411 of mutually supporting with spacing groove 22, through the setting of spacing 411 and spacing groove 22 for connecting hole 43 is more convenient and accurate with the counterpoint of connecting pipe 11.

After the internal portion of anti-corrosion anti-blocking type RD wedge-shaped flowmeter takes place to block up, the staff can demolish the flowmeter to take out fixed subassembly 4 from interior sleeve pipe 2, and then take out pipe 31 that slides from interior sleeve pipe 2, the staff can clear up the inner peripheral surface of interior sleeve pipe 2 and pipe 31 that slides this moment. And are in turn fitted back into the inner sleeve 2. Thereby completing the dredging of the interior of the wedge-shaped flowmeter. The flowmeter can be repeatedly used, and the service life of the corrosion-resistant anti-blocking RD wedge-shaped flowmeter is prolonged.

The sliding pipe 31, the limiting block 32 and the limiting pipe 41 are all made of polytetrafluoroethylene materials, so that corrosion of fluid to parts is reduced, and the stability of the corrosion-resistant anti-blocking RD wedge-shaped flowmeter is improved. The periphery of the wedge-shaped throttling element 3 is coated with a corrosion-resistant polytetrafluoroethylene coating, the polytetrafluoroethylene has stable chemical properties and is not easy to react with most solvents, so that the parts can be protected, and the service life of the wedge-shaped throttling element 3 is prolonged.

The implementation principle of the embodiment is as follows: when the staff is at the corrosion-resistant anti-blocking type RD wedge flow meter of installation, at first insert into the groove 21 that slides the pole that slides, insert in the groove 21 that slides mutually and establish spacing pipe 41 next, will slide pipe 31 through spacing pipe 41 and push up the tip of touching at the groove 21 that slides, the mounting flange 42 on the fixed subassembly 4 card this moment is gone into in holding tank 131 and is leaned on each other with holding tank 131 diapire. At this moment, the staff can fix corrosion-resistant anti-blocking type RD wedge-shaped flowmeter on the pipeline to be measured through flange joint, thereby can measure the fluid flow in the pipeline to be measured, after the inside jam that takes place of corrosion-resistant anti-blocking type RD wedge-shaped flowmeter, the staff can pull down corrosion-resistant anti-blocking type RD wedge-shaped flowmeter from being measured the pipeline, thereby take out spacing pipe 41 in proper order and slide pipe 31 and wash the mediation to wedge throttling element 3, thereby the convenience that corrosion-resistant anti-blocking type RD wedge-shaped flowmeter maintained has been improved.

The embodiment of this specific implementation mode is the preferred embodiment of the present invention, not limit according to this the utility model discloses a protection scope, so: all equivalent changes made according to the structure, shape and principle of the utility model are covered within the protection scope of the utility model.

Claims

1. The anti-corrosion anti-blocking type RD wedge-shaped flowmeter comprises a flow tube (1), wherein two connecting tubes (11) are arranged on the outer peripheral surface of the flow tube (1) along the length direction of the flow tube, the connecting tubes (11) are communicated with the inside of the flow tube (1), and a pressure gauge (12) is arranged at the end part, far away from the flow tube (1), of each connecting tube (11); the method is characterized in that: an inner sleeve (2) which contains fluid and reduces the corrosion of the flow tube (1) by the fluid is inserted into the flow tube (1), and a wedge-shaped throttling piece (3) used for throttling the fluid is connected in the inner sleeve (2) in a sliding manner;

the inner peripheral surface of interior sleeve pipe (2) is coaxial to be seted up an annular groove (21) that slides to the one end in groove (21) and the outside of flow tube (1) communicate each other, and the other end in groove (21) that slides is located between two connecting pipes (11), wedge throttling element (3) outside rigid coupling has one and slides groove (21) cooperation slip pipe (31) that slide, still is provided with a top in groove (21) and touches slip pipe (31) and then will slide fixed subassembly (4) that pipe (31) are fixed.

2. The corrosion-resistant anti-blocking type RD wedge-shaped flowmeter according to claim 1, characterized in that: the end part of the inner sleeve (2) is flush with the end part of the flow tube (1), one end, close to the sliding groove (21), of the flow tube (1) is fixedly connected with a first flange (13) used for being fixed with a measured pipeline, one end, far away from the sliding groove (21), of the flow tube (1) is fixedly connected with a second flange (14), and the first flange (13) and the second flange (14) are in mutual abutting contact with the end surface of the inner sleeve so as to fix the inner sleeve inside the flow tube (1).

3. The corrosion-resistant anti-blocking type RD wedge-shaped flowmeter according to claim 2, characterized in that: fixed subassembly (4) including insert establish slide groove (21) in and with slide spacing pipe (41) that pipe (31) tip is contradicted, spacing pipe (41) one end rigid coupling that deviates from slide pipe (31) have one with first ring flange (13) each other paste fixed flange (42) of leaning on.

4. The corrosion-resistant anti-blocking type RD wedge-shaped flowmeter of claim 3, wherein: an accommodating groove (131) is formed in one face, facing the fixed flange (42), of the first flange plate (13), and when the limiting pipe (41) enables the sliding pipe (31) to be abutted to the end portion of the sliding groove (21), the fixed flange (42) is located in the accommodating groove (131).

5. The corrosion-resistant anti-blocking type RD wedge-shaped flowmeter according to claim 1, characterized in that: a limiting groove (22) is further arranged in the sliding groove (21), and a limiting block (32) matched with the limiting groove (22) is fixedly connected to the outer peripheral surface of the corresponding sliding pipe (31).

6. The corrosion-resistant anti-blocking type RD wedge-shaped flowmeter according to claim 5, characterized in that: two limiting grooves (22) are formed, and two corresponding limiting blocks (32) are also arranged.

7. The corrosion-resistant anti-blocking type RD wedge-shaped flowmeter according to claim 1, characterized in that: the surface of the wedge-shaped throttling piece (3) is provided with a corrosion-resistant coating.

8. The corrosion-resistant anti-blocking type RD wedge-shaped flowmeter of claim 7, wherein: the corrosion-resistant coating is a polytetrafluoroethylene coating.