CN211042340U - Nozzle flowmeter - Google Patents

Nozzle flowmeter Download PDF

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Publication number
CN211042340U
CN211042340U CN201922234354.3U CN201922234354U CN211042340U CN 211042340 U CN211042340 U CN 211042340U CN 201922234354 U CN201922234354 U CN 201922234354U CN 211042340 U CN211042340 U CN 211042340U
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CN
China
Prior art keywords
pipe
nozzle
tube
groove
annular
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Active
Application number
CN201922234354.3U
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Chinese (zh)
Inventor
朱萍萍
刘红梅
付兵
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Anwei Electromechanical Equipment Manufacturing Shanghai Co ltd
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Anwei Electromechanical Equipment Manufacturing Shanghai Co ltd
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Priority to CN201922234354.3U priority Critical patent/CN211042340U/en
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Abstract

The utility model relates to a nozzle flowmeter, which comprises a flow tube, wherein a nozzle is arranged in the flow tube; the flow tube comprises a front tube and a rear tube, the diameter of the outer peripheral surface of the nozzle is larger than the diameter of the inner wall of the front tube and smaller than the outer diameter of the front tube, an annular caulking groove for containing the nozzle is formed in the end surface of the front tube, external threads are formed in the outer peripheral surface of the nozzle, and internal threads matched with the threads of the nozzle are formed in the inner wall of the annular caulking groove; the outer peripheral surfaces of the front pipe and the rear pipe are coaxially and fixedly connected with a third flange respectively, and the two third flanges are fixed with each other through a plurality of bolts. The utility model has the advantages that: the damaged nozzle is convenient to replace, and the replacement efficiency is improved.

Description

Nozzle flowmeter
Technical Field
The utility model belongs to the technical field of the flowmeter and specifically relates to a nozzle flowmeter is related to.
Background
The flow measurement throttling set is a primary device of the differential pressure type flow measurement instrument, the fluid can be measured and transmitted by a differential pressure transmitter through the differential pressure generated by the primary device, and the flow is directly displayed by a flow integrating instrument, thereby forming the differential pressure type flow meter, because the throttling set has wide applicability, the differential pressure type flow measurement instrument still occupies the largest share in the application of the flow measurement instrument so far, the flow measurement throttling set has the advantages of simple structure, convenient installation and maintenance, wide applicability, stable performance, and is particularly suitable for high-temperature and high-pressure working conditions and strong corrosive media, and can measure all single-phase fluids, including liquid, gas and steam, and partial mixed-phase flow, such as: the flow measuring and throttling device is widely applied to industries such as petroleum, petrifaction, chemical industry, electric power, metallurgy, light industry, textile, medicine, food, military industry and the like.
A conventional flow meter with a long-neck nozzle 2, as shown in fig. 1 and 2, includes a flow tube 1, a nozzle 2 disposed in the flow tube 1, two pressure measuring tubes 14 connected to the peripheral surface of the flow tube 1, the pressure measuring tubes 14 being respectively located at two sides of the nozzle 2; the flow tube 1 includes a front tube 11 and a rear tube 12, the two pressure measuring tubes 14 are respectively welded to the peripheral surfaces of the front tube 11 and the rear tube 12, the nozzle 2 is welded to the inner wall of the end of the rear tube 12, and finally the ends of the front tube 11 and the rear tube 12 near the nozzle 2 are welded to each other.
The nozzle 2 flowmeter is mainly applied to flow measurement of high-flow-rate fluid, after the nozzle 2 flowmeter is used for a long time, the nozzle 2 can be damaged, in the existing maintenance process, the rear pipe 12 can be cut off, and the finished rear pipe 12 and the nozzle 2 are welded at the end part of the front pipe 11, so that the complete nozzle 2 flowmeter does not need to be replaced, time and labor are consumed during maintenance, and waste is caused to the finished material.
SUMMERY OF THE UTILITY MODEL
Not enough to prior art exists, one of the purposes of the utility model is to provide a nozzle flowmeter, its advantage is convenient for change the nozzle of damage, has improved change efficiency.
The above utility model discloses an above-mentioned utility model purpose can realize through following technical scheme:
a nozzle flowmeter comprises a flow tube, wherein a nozzle is arranged in the flow tube; the flow tube comprises a front tube and a rear tube, the diameter of the outer peripheral surface of the nozzle is larger than the diameter of the inner wall of the front tube and smaller than the outer diameter of the front tube, an annular caulking groove for containing the nozzle is formed in the end surface of the front tube, external threads are formed in the outer peripheral surface of the nozzle, and internal threads matched with the threads of the nozzle are formed in the inner wall of the annular caulking groove;
the outer peripheral surfaces of the front pipe and the rear pipe are coaxially and fixedly connected with a third flange respectively, and the two third flanges are fixed with each other through a plurality of bolts.
Through adopting above-mentioned technical scheme, when the staff assembles each other the nozzle flowmeter, at first screw the nozzle screw in the annular caulking groove of leading pipe, then dock leading tub of afterbody and the anterior tip of rearmounted pipe each other, butt joint fixed leading pipe and rearmounted pipe with two third flanges through the bolt to the realization is erect fixedly to the nozzle, has also reached sealed effect simultaneously. The normal work of the nozzle flowmeter is guaranteed. If the nozzle is damaged during long-term work, workers can detach the two third flanges, so that the nozzle is detached and replaced. Because the nozzle is firstly fixed on the end surface of the preposed pipe, the mutual butt joint and fixation of the preposed pipe and the postpositive pipe are more efficient.
The present invention may be further configured in a preferred embodiment as: the end surface of the rear pipe facing the front pipe is coaxially and fixedly connected with a positioning pipe, and the end surface of the front pipe provided with the annular caulking groove is provided with a positioning groove matched with the positioning pipe.
Through adopting above-mentioned technical scheme, when leading tub and the butt joint of rearmounted pipe are fixed each other, insert the constant head tank into leading tub of terminal surface with the registration arm of rearmounted pipe tip to improve the area of contact of leading pipe and rearmounted pipe tip, thereby played the effect of blocking water, improved the leakproofness of leading pipe and rearmounted pipe butt joint.
The present invention may be further configured in a preferred embodiment as: one side of the positioning tube departing from the rear tube is fixedly connected with a positioning block, and a position corresponding to the positioning block on the bottom surface of the positioning tube positioning groove is provided with a limiting groove for accommodating the positioning block.
By adopting the technical scheme, when the front pipe and the rear pipe are mutually butted, the positioning block is inserted into the corresponding limiting groove, so that the rotation between the front pipe and the rear pipe is limited, two third flanges are convenient to mutually butt and fix, and the efficiency of butt and fixing the front pipe and the rear pipe is improved.
The present invention may be further configured in a preferred embodiment as: a first annular sealing gasket is clamped between the nozzle and the bottom wall of the annular caulking groove.
Through adopting above-mentioned technical scheme, when the nozzle was screwed to annular caulking groove bottom direction, drive first annular sealing gasket and take place elastic deformation to compensate close the gap of leaning on between nozzle and the annular diapire, thereby improved the sealed effect that blocks water.
The present invention may be further configured in a preferred embodiment as: one side of the nozzle facing the front pipe is provided with a groove for accommodating the first annular sealing gasket.
By adopting the technical scheme, the first annular sealing gasket is limited and fixed by the groove, so that the separation of the first annular sealing gasket from the nozzle is limited when the nozzle and the front pipe are screwed conveniently.
The present invention may be further configured in a preferred embodiment as: one side of the nozzle facing the rear pipe is fixedly connected with a limiting ring, and the end face of the rear pipe is provided with a ring groove for accommodating the limiting ring.
By adopting the technical scheme, when the front pipe and the rear pipe are mutually butted, the limiting ring is inserted into the ring groove, so that the contact area between the front pipe and the end face of the rear pipe is increased, the stability of fixing the nozzle is improved, and the water blocking and sealing effects are also achieved.
The present invention may be further configured in a preferred embodiment as: a second annular sealing gasket is clamped between the limiting ring and the bottom wall of the annular groove.
Through adopting above-mentioned technical scheme, the setting up of second annular sealing gasket has compensatied the contact gap of spacing ring and ring groove bottom to the compactness of nozzle and rearmounted pipe terminal surface contact seal has been improved.
To sum up, the utility model discloses a following at least one useful technological effect:
firstly, the nozzle is convenient to install and dismantle. The nozzle clamped by the front pipe and the rear pipe is convenient to replace by mounting and dismounting the front pipe and the rear pipe;
and secondly, the sealing performance of the butt joint end surface is improved. The arrangement of the first annular sealing gasket and the second annular sealing gasket fills up a connecting gap between the butt joint end faces of the front pipe and the rear straight pipe, and the sealing performance between the front pipe and the rear pipe is improved.
Drawings
FIG. 1 is a schematic diagram of the overall construction of a background art flow meter;
FIG. 2 is a schematic diagram of the internal structure of the flow meter in background focus;
FIG. 3 is a schematic view of the overall structure of a flow meter embodying the present embodiment;
FIG. 4 is a schematic view showing the connection of the pre-pipe to the nozzle;
FIG. 5 is a schematic view showing a nozzle structure;
FIG. 6 is a schematic structural view showing a rear pipe;
FIG. 7 is a schematic view showing a connection relationship between a front pipe and a rear pipe;
fig. 8 is a partial enlarged view of detail a in fig. 7.
In the figure, 1, a flow tube; 11. a front pipe; 111. an annular caulking groove; 112. positioning a groove; 113. a limiting groove; 12. a rear pipe; 121. a ring groove; 13. a third flange; 14. a piezometric tube; 2. a nozzle; 21. a fixed part; 211. a groove; 22. a drainage part; 23. a limiting ring; 3. a first annular seal; 4. a second annular seal; 41. a positioning tube; 42. positioning blocks; .
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
A nozzle flow meter, as shown in fig. 3, includes a flow tube 1, and a nozzle 2 (shown here in fig. 4) disposed within the flow tube 1.
As shown in fig. 3, the flow tube 1 includes a front tube 11 and a back tube 12 having the same size, a third flange 13 is fixed to each of the outer peripheral surfaces of the front tube 11 and the back tube 12, two third flanges 13 are close to the end portions of the front tube 11 and the back tube 12 that are butted against each other, and the two third flanges 13 are fixed to each other by bolts and nuts, thereby achieving the mutual attachment and detachment of the front tube 11 and the back tube 12.
As shown in fig. 3 and 4, the nozzle 2 includes an annular fixing portion 21 and a tubular flow guide portion 22 provided on the fixing portion 21 side. The nozzle 2 is interposed at the butt end face of the front pipe 11 and the rear pipe 12, and the flow guide portion 22 of the nozzle 2 is disposed toward the rear pipe 12. The peripheral surface of the front pipe 11 and the peripheral surface of the rear pipe 12 are respectively fixedly connected with a pressure measuring pipe 14, and the pressure measuring pipe 14 is communicated with the interiors of the front pipe 11 and the rear pipe 12. The pressure measuring equipment can be inserted into the front pipe 11 and the rear pipe 12 through the pressure measuring pipes 14 by workers, so that the pressure difference of liquid or gas before and after passing through the nozzle 2 can be measured conveniently.
As shown in fig. 3, the diameter of the outer peripheral surface of the fixing portion 21 of the nozzle 2 is larger than the inner diameter of the front pipe 11 and smaller than the outer diameter of the front pipe 11, an annular caulking groove 111 is formed on the end surface of the front pipe 11 facing the rear pipe 12, the diameter of the inner peripheral surface of the annular caulking groove 111 is equal to the diameter of the outer peripheral surface of the fixing portion 21 of the nozzle 2, the outer peripheral surface of the fixing portion 21 of the nozzle 2 is provided with external threads, and the annular inner wall of the annular caulking groove 111 is provided with internal threads which are in threaded fit with. When the operator fixes the nozzle 2, the fixing part 21 of the nozzle 2 can be screwed in the annular caulking groove 111, so that the tightness of the connection between the nozzle 2 and the preposed pipe 11 is improved, and the butt joint difficulty of the preposed pipe 11 and the rear pipe 12 is reduced.
As shown in the figure, an annular groove 211 is formed in one side of the fixing portion 21 of the nozzle 2 facing the bottom wall of the annular embedding groove 111, and the position of the groove 211 corresponds to the bottom wall area of the annular embedding groove 111. A first annular seal 3 is embedded in the recess 211. When the fixed part 21 of the nozzle 2 is attached to the bottom wall of the annular caulking groove 111, the first annular sealing gasket 3 is extruded to deform, so that the attachment gap between the fixed part 21 of the nozzle 2 and the bottom wall of the annular caulking groove 111 is filled, and the water blocking and sealing effects are achieved.
As shown in fig. 4 and 5, a limiting ring 23 is fixedly connected to one side of the nozzle 2 fixed to the rear pipe 12, the positions of the limiting ring 23 and the end surface of the rear pipe 12 correspond to each other, and an annular groove 121 for accommodating the limiting ring 23 is formed in the end surface of the rear pipe 12, the depth of the annular groove 121 is greater than the height of the limiting ring 23, and a second annular sealing gasket 4 is further embedded in the bottom of the annular groove 121, when the rear pipe 12 and the front pipe 11 are butted with each other, the limiting ring 23 is inserted into the annular groove 121 and extrudes the second annular sealing gasket 4, so that the second annular sealing gasket 4 is deformed and filled in the insertion gap between the limiting ring 23 and the annular groove 121, and the water blocking and sealing effects are further achieved.
As shown in fig. 6 and 7, a positioning tube 41 is fixed on the end surface of the rear tube 12 facing the front tube 11, the positioning tube 41 is coaxial with the rear tube 12, and a positioning slot 112 (shown in fig. 8) for accommodating the positioning tube 41 is opened on the end surface of the front tube 11 having the annular embedding slot 111. When the front pipe 11 and the rear pipe 12 are mutually butted and fixed, the positioning pipe 41 is inserted into the positioning groove 112 of the front pipe 11, so that the butting area of the front pipe 11 and the rear pipe 12 is increased, and the butting stability of the front pipe 11 and the rear pipe 12 is ensured. Two positioning blocks 42 are fixedly connected to the end surface of the positioning tube 41 away from the rear tube 12, and a position on the bottom wall of the positioning slot 112 corresponding to the positioning blocks 42 is provided with a limiting groove 113 (shown in fig. 8) which is matched with the two positioning blocks 42. When the positioning block 42 is inserted into the positioning slot 112, the positioning block 42 is located in the limiting slot 113, so that the relative rotation between the front pipe 11 and the rear pipe 12 is limited, and the mutual fixation between the two third flanges 13 is facilitated.
If the nozzle 2 is damaged during the long-term use of the flowmeter of the nozzle 2, workers can replace the nozzle 2 by detaching the two third flanges 13 from each other. And the front pipe 11 and the rear straight pipe are mutually fixed only through bolts and nuts, the fixing mode is simple in structure, and the maintenance cost is low. And the nozzle 2 is screwed at the end part of the front pipe 11, so that the stability of mutual detachment of the front pipe 11 and the rear straight pipe is improved, and secondary damage is not easily caused in the detachment process of the nozzle 2.
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 (8)

1. A nozzle flowmeter comprises a flow tube (1), wherein a nozzle (2) is arranged in the flow tube (1); flow tube (1) is including leading pipe (11) and postposition pipe (12), its characterized in that: the diameter of the outer peripheral surface of the nozzle (2) is larger than that of the inner wall of the front pipe (11) and smaller than the outer diameter of the front pipe (11), an annular caulking groove (111) for accommodating the nozzle (2) is formed in the end surface of the front pipe (11), external threads are formed in the outer peripheral surface of the nozzle (2), and internal threads matched with the nozzle (2) in a threaded manner are formed in the inner wall of the annular caulking groove (111);
the outer peripheral surfaces of the front pipe (11) and the rear pipe (12) are coaxially and fixedly connected with third flanges (13), and the two third flanges (13) are mutually fixed through a plurality of bolts.
2. A nozzle flow meter according to claim 1, wherein: the end surface of the rear pipe (12) facing the front pipe (11) is coaxially and fixedly connected with a positioning pipe (41), and the end surface of the front pipe (11) provided with the annular caulking groove (111) is provided with a positioning groove (112) matched with the positioning pipe (41).
3. A nozzle flow meter according to claim 2, wherein: one side of the positioning tube (41) departing from the rear tube (12) is fixedly connected with a positioning block (42), and a position corresponding to the positioning block (42) on the bottom surface of the positioning groove (112) of the front tube (11) is provided with a limiting groove (113) for accommodating the positioning block (42).
4. A nozzle flow meter according to claim 3, wherein: the positioning blocks (42) are uniformly arranged along the annular direction of the positioning pipe (41).
5. A nozzle flow meter according to claim 1, wherein: a first annular sealing gasket (3) is clamped between the nozzle (2) and the bottom wall of the annular caulking groove (111).
6. A nozzle flow meter according to claim 5, wherein: one side of the nozzle (2) facing the front pipe (11) is provided with a groove (211) for accommodating the first annular sealing gasket (3).
7. A nozzle flow meter according to claim 1, wherein: one side of the nozzle (2) facing the rear pipe (12) is fixedly connected with a limiting ring (23), and the end face of the rear pipe (12) is provided with a ring groove (121) for accommodating the limiting ring (23).
8. A nozzle flow meter according to claim 7, wherein: a second annular sealing gasket (4) is clamped between the limiting ring (23) and the bottom wall of the annular groove (121).
CN201922234354.3U 2019-12-12 2019-12-12 Nozzle flowmeter Active CN211042340U (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN201922234354.3U CN211042340U (en) 2019-12-12 2019-12-12 Nozzle flowmeter

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN201922234354.3U CN211042340U (en) 2019-12-12 2019-12-12 Nozzle flowmeter

Publications (1)

Publication Number Publication Date
CN211042340U true CN211042340U (en) 2020-07-17

Family

ID=71567356

Family Applications (1)

Application Number Title Priority Date Filing Date
CN201922234354.3U Active CN211042340U (en) 2019-12-12 2019-12-12 Nozzle flowmeter

Country Status (1)

Country Link
CN (1) CN211042340U (en)

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