阅读说明：本技术 一种喉径可调的文丘里管 (Venturi tube with adjustable throat diameter ) 是由 周苏湘 于 2021-10-22 设计创作，主要内容包括：本发明涉及文丘里管技术领域,尤其涉及一种喉径可调的文丘里管。所述喉径可调的文丘里管包括外管、喉管、配合管、压管和收紧机构,所述外管分为直管段和扩散段,所述直管段和扩散段的相接处形成一个限位台,所述喉管插设在外管上的直管段中并与直管段的内侧壁滑动连接；所述配合管插设在外管上的直管段中并与直管段的内侧壁滑动连接,用于将外管、喉管和配合管紧密连接在一起的所述压管套接在外管上,并位于直管段的开口上,所述压管包括L型段和直型段,所述L型段套接在直管段上与直管段的外侧壁滑动连接,用于给压管提成助力的所述收紧机构安装在外管上。本发明提供的喉径可调的文丘里管便于维护和检修,具有结构简单和装配简单的优点。(The invention relates to the technical field of Venturi tubes, in particular to a Venturi tube with an adjustable throat diameter. The venturi tube with the adjustable throat diameter comprises an outer tube, a throat tube, a matching tube, a pressure tube and a tightening mechanism, wherein the outer tube is divided into a straight tube section and a diffusion section, a limiting table is formed at the joint of the straight tube section and the diffusion section, and the throat tube is inserted into the straight tube section on the outer tube and is in sliding connection with the inner side wall of the straight tube section; the matching pipe is inserted into the straight pipe section on the outer pipe and is in sliding connection with the inner side wall of the straight pipe section, the pressing pipe which is used for tightly connecting the outer pipe, the throat pipe and the matching pipe together is sleeved on the outer pipe and is positioned on the opening of the straight pipe section, the pressing pipe comprises an L-shaped section and a straight section, the L-shaped section is sleeved on the straight pipe section and is in sliding connection with the outer side wall of the straight pipe section, and the tightening mechanism which is used for providing power for the pressing pipe is installed on the outer pipe. The venturi tube with the adjustable throat diameter is convenient to maintain and overhaul, and has the advantages of simple structure and simplicity in assembly.)

1. A venturi with an adjustable throat diameter, comprising:

the outer pipe (1), the outer pipe (1) is divided into a straight pipe section (11) and a diffuser section (12);

the throat pipe (2) is inserted into the straight pipe section (11) on the outer pipe (1) and is in sliding connection with the inner side wall of the straight pipe section (11);

the matching pipe (3) is inserted into the straight pipe section (11) on the outer pipe (1) and is in sliding connection with the inner side wall of the straight pipe section (11);

the pressure pipe (4) is used for tightly connecting the outer pipe (1), the throat pipe (2) and the matching pipe (3) together, and the pressure pipe (4) is sleeved on the outer pipe (1) and is positioned on an opening of the straight pipe section (11);

and the tightening mechanism (6) is used for locking the pressing pipe (4) on the outer pipe (1).

2. A venturi tube with adjustable throat diameter according to claim 1, wherein the junction of the straight tube section (11) and the diverging section (12) forms a stop (9).

3. The venturi tube with the adjustable throat diameter according to claim 1, wherein the pressure tube (4) comprises an L-shaped section (41) and a straight section (42), and the L-shaped section (41) is sleeved on the straight tube section (11) and is in sliding connection with the outer side wall of the straight tube section (11).

4. The venturi tube with the adjustable throat diameter according to claim 3, wherein two symmetrically arranged connecting strips (5) are arranged on the L-shaped section (41), and the connecting strips (5) and the L-shaped section (41) are integrally formed.

5. The venturi tube with the adjustable throat diameter according to claim 1, wherein the tightening mechanism (6) comprises a mounting plate (61), a threaded rod (62), a knob (63), a pulling plate (64) and a sliding rod (65), the mounting plate (61) is fixedly mounted on the outer side wall of the outer tube (1), the threaded rod (62) in threaded connection penetrates through the mounting plate (61), the knob (63) is fixedly mounted at one end of the threaded rod (62), the pulling plate (64) in rotary connection is mounted at the other end of the threaded rod (62), the sliding rod (65) is fixedly mounted on the pulling plate (64), and the sliding rod (65) penetrates through the mounting plate (61) and is in sliding connection with the mounting plate (61).

6. The venturi tube with the adjustable throat diameter according to claim 1, wherein two symmetrically arranged positioning grooves (7) are formed in the inner side wall of the straight tube section (11), and two measuring tubes (9a) are fixedly mounted on the straight tube section (11).

7. A venturi tube with adjustable throat diameter according to claim 1, wherein the straight tube section (11) is provided with two symmetrically arranged through slots (8), and the through slots (8) are located in the positioning slots (7).

8. The venturi tube with the adjustable throat diameter according to claim 1, wherein two symmetrically arranged limiting strips (9b) are fixedly mounted on the outer side walls of the throat tube (2) and the matching tube (3), and through holes (9d) are formed in the throat tube (2) and the matching tube (3).

9. A Venturi tube according to claim 8, characterised in that the limiting strip (9b) on the throat (2) is provided with a groove (9 c).

10. The venturi tube with adjustable throat diameter according to claim 1, wherein a fixing plate (9e) is fixedly installed on the outer side wall of the outer tube (1).

Technical Field

The invention relates to the technical field of Venturi tubes, in particular to a Venturi tube with an adjustable throat diameter.

Background

A Venturi tube (Venturi throat) can be used as a meter for measuring the flow rate; and also as a highly efficient gas cooling, purification or absorption apparatus. The venturi tube is divided into a built-in venturi tube and a plug-in venturi tube according to the structure. The method has good effect in the measurement of combustion-supporting air, cold air and gas of hot blast stoves of steel plants (blast furnace gas, coke oven gas and converter gas) and the measurement of primary air and secondary air large-diameter and low-flow-rate pipelines of boilers of thermal power plants. The method solves the problem of accurate measurement of various gas flows of low pressure, large pipe diameter and low flow velocity in the existing industrial enterprises. The unique structure design and the data processing method have strict fluid mechanics basis and carry out real-flow calibration in a large-scale key laboratory of the country.

When the Venturi tube is used for measurement, the size of the throat of the Venturi tube in the tube body can be conveniently adjusted at any time according to the requirements of measuring the flow and the pressure in the tube body in an actual use scene. Therefore, a single conventional flowmeter cannot meet the requirement of full-range measurement, a plurality of flow measuring devices are usually connected in parallel, full-range measurement is carried out in a valve switching or combining mode to measure the flow in different processes, different valve combinations need to be switched according to different flow states in the mode, on one hand, the measurement process is complicated, the control procedure is complex, and more execution elements are also needed to be matched to complete the switching of the measuring devices; on the other hand, the measurement cost is increased by several times; finally, a plurality of measuring devices need larger installation space, higher requirements are put forward for applicable environment, and correspondingly, the installation, maintenance and overhaul costs are greatly increased. The existing Venturi tubes with changeable throat diameters have the advantages that although the cost is reduced and the installation space is reduced, the structure is complex, the maintenance and the overhaul are difficult, and the Venturi tubes can be discarded once being damaged, so that the waste is caused.

Therefore, there is a need to provide a new venturi with adjustable throat diameter to solve the above technical problems.

Disclosure of Invention

In order to solve the technical problems, the invention provides the venturi tube with the adjustable throat diameter, which has the advantages of simple structure, convenience in maintenance and overhaul and simplicity in assembly.

The invention provides a venturi tube with adjustable throat diameter, which comprises: the outer pipe is divided into a straight pipe section and a diffusion section, and the throat pipe is inserted into the straight pipe section on the outer pipe and is in sliding connection with the inner side wall of the straight pipe section; the matching pipe is inserted into the straight pipe section on the outer pipe and is in sliding connection with the inner side wall of the straight pipe section, the pressing pipe is sleeved on the outer pipe and located on the opening of the straight pipe section, the tightening mechanism is used for locking the pressing pipe on the outer pipe, one end of the wide throat pipe is aligned to the straight pipe section on the outer pipe and inserted in during assembly, the matching pipe is aligned to the straight pipe section on the outer pipe and sleeved on the straight pipe section after being inserted in, the pressing pipe is rotated to be connected with the tightening mechanism, and the pressing pipe is pulled to the straight pipe section by using the tightening mechanism, so that the outer pipe, the throat pipe, the matching pipe and the pressing pipe are tightly connected together, liquid leakage and gas leakage are avoided, the assembly is simple, the formed Venturi pipe is simple in structure, and the maintenance and the overhaul are convenient.

Preferably, the junction of the straight pipe section and the diffuser section forms a limiting table, and the limiting table limits the throat pipe in the straight pipe section.

Preferably, the pressure pipe comprises an L-shaped section and a straight section, the L-shaped section is sleeved on the straight section and is in sliding connection with the outer side wall of the straight section, the L-shaped section is used for being connected with the outer pipe under the condition that the pipe diameter is not changed, and the straight section is used for being connected with a pipeline needing to be measured.

Preferably, the L-shaped section is provided with two symmetrically arranged connecting strips, the connecting strips and the L-shaped section are integrally formed, and the connecting strips are used for connecting the L-shaped section and the tightening mechanism together.

Preferably, tightening mechanism includes mounting panel, threaded rod, knob, arm-tie and slide bar, mounting panel fixed mounting is on the lateral wall of outer tube, and runs through threaded connection's threaded rod in the mounting panel, the one end fixed mounting of threaded rod has the knob, and the other end of threaded rod installs the arm-tie of rotation connection, fixed mounting has the slide bar on the arm-tie, and the slide bar run through the mounting panel and with mounting panel sliding connection, with the connecting strip precession arm-tie in, rotate the knob, drive the threaded rod and rotate for the threaded rod area arm-tie removes to the mounting panel direction, taut connecting strip, make L type section and straight tube section zonulae occludens, presses outer tube, choke and cooperation pipe to tightly link together, avoids the weeping gas leakage.

Preferably, set up the constant head tank that two symmetries set up on the inside wall of straight tube section, and fixed mounting has two survey burets on the straight tube section, and the constant head tank is used for fixed choke and cooperation position of pipe, avoids its emergence to rotate, plugs up survey buret.

Preferably, the straight pipe section is provided with two symmetrically arranged through grooves, the through grooves are located in the positioning grooves, and when the throat pipe is replaced, the throat pipe is pried out of the outer pipe by an insertion tool.

Preferably, equal fixed mounting has the spacing of two symmetries settings on the lateral wall of choke and cooperation pipe, and all seted up the through-hole on choke and the cooperation pipe, and spacing is inserted and is established in the constant head tank, fixes the position of choke and cooperation pipe together with the constant head tank, misplaces when avoiding it to take place to rotate or install for the through-hole dislocation causes survey buret and choke and cooperation intraduct to not communicate.

Preferably, the limiting strip positioned on the throat pipe is provided with a groove, and the groove provides a prying point for a tool for prying the throat pipe.

Preferably, a fixing plate is fixedly mounted on the outer side wall of the outer tube and used for mounting the outer tube on a measuring instrument.

Compared with the related art, the venturi tube with the adjustable throat diameter has the following beneficial effects:

1. the invention provides a venturi tube with an adjustable throat diameter, during assembly, the wider end of the throat tube is aligned with a straight tube section on an outer tube and inserted, a limiting strip is aligned with a positioning groove, a through hole is aligned with a measuring tube, a matching tube is aligned with the straight tube section on the outer tube and inserted, the limiting strip is aligned with the positioning groove, the through hole is aligned with the measuring tube, an L-shaped section on the pressing tube is sleeved on the straight tube section, the pressing tube is rotated, the connecting strip is screwed into a pulling plate, a knob is rotated to drive a threaded rod to rotate, the threaded rod drives the pulling plate to move towards a mounting plate, the connecting strip is tensioned, the L-shaped section is tightly connected with the straight tube section, the outer tube, the throat tube and the matching tube are tightly connected together, liquid leakage and air leakage are avoided, the assembly is simple, the formed venturi tube has a simple structure, and is convenient to maintain and overhaul;

2. the invention can change the throat diameter of the Venturi tube only by changing the throat tubes with different throat diameters, has simple operation and is easy to maintain and overhaul.

Drawings

FIG. 1 is a schematic structural view of a preferred embodiment of the adjustable throat diameter venturi of the present invention;

FIG. 2 is a schematic cross-sectional view of the outer tube shown in FIG. 1;

FIG. 3 is a side view of the outer tube of FIG. 1;

FIG. 4 is an assembled view of the structure of FIG. 1;

fig. 5 is a schematic sectional structure view of the throat pipe shown in fig. 4.

Reference numbers in the figures: 1. an outer tube; 11. a straight pipe section; 12. a diffuser section; 2. a throat; 3. a mating tube; 4. pressing a pipe; 41. an L-shaped section; 42. a straight section; 5. a connecting strip; 6. a tightening mechanism; 61. mounting a plate; 62. a threaded rod; 63. a knob; 64. pulling a plate; 65. a slide bar; 7. positioning a groove; 8. a through groove; 9. a limiting table; 9a, measuring tube; 9b, a limiting strip; 9c, a groove; 9d, through holes; 9e, fixing the plate.

Detailed Description

The invention is further described with reference to the following figures and embodiments.

Referring to fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, wherein fig. 1 is a schematic structural view of a preferred embodiment of a venturi with an adjustable throat diameter according to the present invention; FIG. 2 is a schematic cross-sectional view of the outer tube shown in FIG. 1; FIG. 3 is a side view of the outer tube of FIG. 1; FIG. 4 is an assembled view of the structure of FIG. 1; fig. 5 is a schematic sectional structure view of the throat pipe shown in fig. 4. The method comprises the following steps: the pipe comprises an outer pipe 1, a throat pipe 2, a matching pipe 3, a pressing pipe 4 and a tightening mechanism 6.

In a specific implementation process, as shown in fig. 1, fig. 2, fig. 3, fig. 4 and fig. 5, the outer tube 1 is divided into a straight tube section 11 and a diffuser section 12, and the throat pipe 2 is inserted into the straight tube section 11 on the outer tube 1 and is slidably connected with the inner side wall of the straight tube section 11; the matching pipe 3 is inserted into the straight pipe section 11 on the outer pipe 1 and is in sliding connection with the inner side wall of the straight pipe section 11, the pressing pipe 4 which is used for tightly connecting the outer pipe 1, the throat pipe 2 and the matching pipe 3 together is sleeved on the outer pipe 1 and is positioned on the opening of the straight pipe section 11, and the tightening mechanism 6 is used for locking the pressing pipe 4 on the outer pipe 1.

It should be noted that: during the assembly, aim at straight tube section 11 on the outer tube 1 with the one end of larynx 2 broad earlier and insert into, aim at straight tube section 11 on the outer tube 1 with cooperation pipe 3 again and insert into the back, will press pipe 4 cover to straight tube section 11 on, pipe 4 is pressed in the rotation, make it link to each other with tightening mechanism 6, use tightening mechanism 6 will press pipe 4 to draw to straight tube section 11, make the outer tube 1, larynx 2, cooperation pipe 3 with press pipe 4 to tightly link together, avoid the weeping gas leakage, the assembly is simple, the venturi simple structure of formation, be convenient for maintain and overhaul.

It should be noted that: the throat diameters are different because the outer diameters of the replacement throats 2 with different throat diameters are the same.

Referring to fig. 2, the junction of the straight tube section 11 and the diverging section 12 forms a stop 9, and the stop 9 limits the throat 2 within the straight tube section 11.

Referring to fig. 1, the pressing pipe 4 includes an L-shaped section 41 and a straight section 42, and the L-shaped section 41 is sleeved on the straight section 11 and slidably connected with an outer side wall of the straight section 11.

It should be noted that: the L-shaped section 41 is used for connecting with the outer pipe 1 without changing the pipe diameter, and the straight section 42 is used for connecting with the pipeline to be measured.

Referring to fig. 1, tightening mechanism 6 includes mounting panel 61, threaded rod 62, knob 63, arm-tie 64 and slide bar 65, mounting panel 61 fixed mounting is on the lateral wall of outer tube 1, and runs through threaded connection's threaded rod 62 in the mounting panel 61, the one end fixed mounting of threaded rod 62 has knob 63, and the other end of threaded rod 62 installs the arm-tie 64 of rotating the connection, fixed mounting has slide bar 65 on the arm-tie 64, and slide bar 65 run through mounting panel 61 and with mounting panel 61 sliding connection, be provided with the connecting strip 5 that two symmetries set up on the L type section 41, and connecting strip 5 and L type section 41 integrated into one piece.

It should be noted that: the connecting strip 5 is screwed into the pulling plate 64, the knob 63 is rotated to drive the threaded rod 62 to rotate, so that the threaded rod 62 drives the pulling plate 64 to move towards the mounting plate 61, the connecting strip 5 is tensioned, the L-shaped section 41 is tightly connected with the straight pipe section 11, the outer pipe 1, the throat pipe 2 and the matching pipe 3 are tightly connected together, and leakage and air leakage are avoided.

Referring to fig. 2, two symmetrically arranged positioning grooves 7 are formed in the inner side wall of the straight pipe section 11, two measuring pipes 9a are fixedly mounted on the straight pipe section 11, and the positioning grooves 7 are used for fixing the positions of the throat pipe 2 and the matching pipe 3, so that the measuring pipes 9a are prevented from being misplaced during rotation or installation and blocked.

Referring to fig. 2, the straight tube section 11 is provided with two symmetrically arranged through grooves 8, the through grooves 8 are located in the positioning grooves 7, and when the throat pipe 2 is replaced, the throat pipe 2 is pried out of the outer tube 1 by an insertion tool.

Referring to fig. 4 and 5, two symmetrically arranged limiting strips 9b are fixedly mounted on the outer side walls of the throat pipe 2 and the matching pipe 3, through holes 9d are formed in the throat pipe 2 and the matching pipe 3, the limiting strips 9b are inserted into the positioning grooves 7, the throat pipe 2 and the matching pipe 3 are fixed together with the positioning grooves 7, and dislocation of the throat pipe 2 and the matching pipe 3 during rotation or installation is avoided, so that the through holes 9d are dislocated, and the measuring pipe 9a is not communicated with the throat pipe 2 and the matching pipe 3.

Referring to fig. 5, a groove 9c is formed on the limiting strip 9b on the throat 2, and the groove 9c provides a prying point for a tool for prying the throat 2.

Referring to fig. 1, a fixing plate 9e is fixedly mounted on an outer side wall of the outer tube 1, and is used for mounting the outer tube 1 on a measuring instrument.

The working principle of the venturi tube with the adjustable throat diameter provided by the invention is as follows:

during assembly, the wider end of the throat pipe 2 is aligned with the straight pipe section 11 on the outer pipe 1 and inserted, the limiting strip 9b is aligned with the positioning groove 7, the through hole 9d is aligned with the measuring pipe 9a, the matching pipe 3 is aligned with the straight pipe section 11 on the outer pipe 1 and inserted, the limiting strip 9b is aligned with the positioning groove 7, the through hole 9d is aligned with the measuring pipe 9a, the L-shaped section 41 on the pressing pipe 4 is sleeved on the straight pipe section 11, the pressing pipe 4 is rotated, the connecting strip 5 is screwed into the pulling plate 64, the knob 63 is rotated to drive the threaded rod 62 to rotate, the pulling plate 64 is driven by the threaded rod 62 to move towards the mounting plate 61, the connecting strip 5 is tensioned, the L-shaped section 41 is tightly connected with the straight pipe section 11, the outer pipe 1, the throat pipe 2 and the matching pipe 3 are pressed to be tightly connected together, liquid leakage and air leakage are avoided, the assembly is simple, and the formed Venturi tube is simple in structure and convenient to maintain and overhaul; when changing the choke 2, rotatory knob 63 for press the pipe 4 not hard up, rotate again and press the pipe 4, with connecting strip 5 back-out arm-tie 64, will press pipe 4 to separate from outer tube 1, inject the instrument into logical groove 8, and pass logical groove 8 and inject recess 9c in, prize choke 2, make choke 2 and cooperation pipe 3 roll-off outer tube 1, install the choke 2 of above-mentioned assembly step other specifications again, easy operation.

The above description is only an embodiment of the present invention, and not intended to limit the scope of the present invention, and all modifications of equivalent structures and equivalent processes, which are made by using the contents of the present specification and the accompanying drawings, or directly or indirectly applied to other related technical fields, are included in the scope of the present invention.