CN209927192U - Explosion-proof electromagnetic flowmeter - Google Patents
Explosion-proof electromagnetic flowmeter Download PDFInfo
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- CN209927192U CN209927192U CN201920760074.3U CN201920760074U CN209927192U CN 209927192 U CN209927192 U CN 209927192U CN 201920760074 U CN201920760074 U CN 201920760074U CN 209927192 U CN209927192 U CN 209927192U
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Abstract
The utility model discloses an explosion-proof type electromagnetic flowmeter uses electric conductor flow measurement field, and its technical scheme main points are: the anti-explosion cable comprises a connecting pipeline, electrodes arranged on the connecting pipeline in pairs, a shell arranged on the upper portion of the connecting pipeline, and a front end cover and a rear end cover which are in threaded connection with front and rear opening ends of the shell, wherein two binding posts are in threaded connection on the outer wall of the shell, a cable in the shell penetrates through the binding posts and extends out of the binding posts, a protective shell is arranged on the outer periphery of the connecting pipeline, an anti-explosion cavity A is formed between the connecting pipeline and the protective shell, an electromagnetic coil is arranged in the anti-explosion cavity A, a guide pipe is fixedly connected to the protective shell, an anti-explosion cavity B is formed in the guide pipe, a flange piece A is fixedly connected to one end, away from the protective shell, of; has the technical effects that: the explosion-proof performance of the electromagnetic flowmeter can be effectively enhanced, and the production safety is ensured.
Description
Technical Field
The utility model relates to an electric conductor flow measurement field, in particular to explosion-proof type electromagnetic flowmeter.
Background
With the continuous improvement of the industrial automation level, in the industrial production process, the flow and the flow velocity of fluid in various pipelines need to be accurately measured and controlled, and the electromagnetic flowmeter is widely used as a conductor flow measuring device. The electromagnetic flowmeter is a device for measuring flow according to Faraday's law of electromagnetic induction, and calculates the flow velocity of fluid in a pipeline by measuring induced electromotive force generated on electrodes at two sides of a measuring conduit when the fluid makes cutting magnetic induction line motion in a magnetic field so as to determine the flow.
The explosion-proof performance of the electromagnetic flow meter existing in the market at present is low, the structural strength is poor, the explosion-proof requirement of a specific production area can not be met frequently, and great potential safety hazards are brought to industrial production. Therefore, there is a need for an electromagnetic flowmeter with improved explosion-proof performance.
SUMMERY OF THE UTILITY MODEL
The utility model aims at providing an explosion-proof type electromagnetic flowmeter, its advantage: the explosion-proof performance of the electromagnetic flowmeter can be effectively enhanced, and the production safety is ensured.
The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides an explosion-proof type electromagnetic flowmeter, includes connecting tube, sets up electrode on connecting tube in pairs, sets up front end housing and the rear end cap of open end around the casing at connecting tube upper portion casing and threaded connection, threaded connection has two terminals on the outer wall of casing, cable in the casing is worn to establish in the terminal, and extends outside the terminal, the outer peripheral edges of connecting tube is equipped with the protecting crust, be formed with explosion-proof chamber A between connecting tube and the protecting crust, solenoid has been arranged in the explosion-proof chamber A, fixedly connected with pipe on the protecting crust, be formed with explosion-proof chamber B in the pipe, the one end fixedly connected with flange piece A of protecting crust is kept away from to the pipe, fixedly connected with and flange piece A bolted connection's flange piece B on the casing.
By the technical scheme, the protective shell can well protect the stability of the electrode and the electromagnetic coil in the installation and use processes; meanwhile, the polyurethane insulation pouring sealant with excellent sealing performance and insulativity is filled in the explosion-proof cavity A and the explosion-proof cavity B, so that the cable can be effectively isolated from the external environment to increase the insulation performance of the cable, the explosion-proof performance of the electromagnetic flowmeter is improved, and the safe operation of the electromagnetic flowmeter is ensured.
The utility model discloses further set up to: one side, far away from the pipe, of the flange piece A is connected with a boss, a groove for the boss to insert is formed in the flange piece B, an explosion-proof joint surface is formed on the wall of the groove along the periphery, and the periphery of the boss is matched with the explosion-proof joint surface.
Through the technical scheme, the boss is inserted into the groove and connected with the groove through the explosion-proof joint surface, so that the boss can be tightly and firmly clamped in the groove, the connection strength between the flange piece A and the flange piece B is improved, and the stability and the safety of the integral use of the electromagnetic flowmeter are ensured.
The utility model discloses further set up to: and a temperature fuse is arranged in the explosion-proof cavity A and is connected in series on the cable.
Through the technical scheme, the temperature fuse can sense overheating generated by the cable in an abnormal operation process in time, and the safety cut-off is performed to protect the circuit through self fusing, so that circuit fault expansion or fire disaster is avoided, and the safe operation of the electromagnetic flowmeter is ensured.
The utility model discloses further set up to: and the outer surface of the part of the cable extending out of the binding post is wrapped with an insulating sleeve.
Through above-mentioned technical scheme, the direct contact of cable and external environment has been avoided to the insulating cover, has effectively strengthened the leakproofness and the insulating nature of cable, further improves electromagnetic flowmeter's explosion-proof performance, and the insulating cover can also prevent that the cable from receiving external environment or artificial destruction simultaneously, protects the safety and stability of the normal work of cable.
The utility model discloses further set up to: and an explosion-proof cavity C is arranged in the binding post, and the cable penetrates through the explosion-proof cavity C and extends out of the binding post.
Through the technical scheme, the polyurethane insulation pouring sealant is filled in the explosion-proof cavity C, so that the sealing property and the insulating property of the cable can be further enhanced, and the safe operation of the cable is ensured.
The utility model discloses further set up to: the inner surface of the protective shell is covered with a magnetic field shielding layer along the periphery.
Through the technical scheme, the magnetic field shielding layer is used for shielding the interference of an external magnetic field to the electromagnetic coil, so that the stability of the internal magnetic field of the electromagnetic flowmeter is effectively ensured, and the measurement precision of the electromagnetic flowmeter is ensured.
The utility model discloses further set up to: an inert gas cavity is formed in the shell, and the cable is arranged in the inert gas cavity in a penetrating mode.
Through the technical scheme, the inert gas chamber is filled with nitrogen, so that the possibility of air around the cable can be reduced, the cable is lack of necessary conditions for generating a fire source, and the explosion resistance and the use safety of the electromagnetic flowmeter are improved.
The utility model discloses further set up to: and a plurality of reinforcing plates are arranged between the two end faces of the protective shell and the connecting pipeline along the periphery.
Through above-mentioned technical scheme, the reinforcing plate helps strengthening the structural strength between protecting crust and the connecting tube to guarantee the security that the electromagnetic flowmeter used, improved the life of electromagnetic flowmeter.
To sum up, the utility model discloses following beneficial effect has:
1. polyurethane insulation pouring sealant with excellent sealing property and insulativity is filled in the explosion-proof cavity A, the explosion-proof cavity B and the explosion-proof cavity C, so that the cable can be effectively isolated from the external environment to increase the insulation property of the cable, the explosion-proof property of the electromagnetic flowmeter is improved, and the safe operation of the electromagnetic flowmeter is ensured;
2. the boss is inserted into the groove and connected through the explosion-proof joint surface, so that the boss can be tightly and firmly clamped in the groove to improve the connection strength between the flange piece A and the flange piece B, and the integral use stability and safety of the electromagnetic flowmeter are ensured;
3. the temperature fuse can sense overheating generated by the cable in an abnormal operation process in time, and the circuit is protected by fusing and safely cutting off the temperature fuse, so that circuit fault expansion or fire hazard is avoided, and safe operation of the electromagnetic flowmeter is guaranteed.
Drawings
Fig. 1 is a schematic view of the overall structure of the present embodiment.
Fig. 2 is a schematic structural diagram for embodying the inside of the electromagnetic flowmeter according to the present embodiment.
Fig. 3 is a schematic structural diagram for embodying the inside of the housing in the present embodiment.
Fig. 4 is a schematic structural diagram for embodying the electromagnetic coil in the present embodiment.
Fig. 5 is a schematic structural diagram of the magnetic shielding layer according to the present embodiment.
Reference numerals: 1. connecting a pipeline; 2. an electrode; 3. a housing; 4. a front end cover; 5. a rear end cap; 6. a binding post; 7. a cable; 8. a protective shell; 9. an explosion-proof cavity A; 10. an electromagnetic coil; 11. a conduit; 12. an explosion-proof cavity B; 13. a flange sheet A; 14. a flange sheet B; 15. a boss; 16. a groove; 17. an explosion-proof joint surface; 18. a temperature fuse; 19. an insulating sleeve; 20. an explosion-proof cavity C; 21. a magnetic field shielding layer; 22. an inert gas chamber; 23. a reinforcing plate.
Detailed Description
The present invention will be described in further detail with reference to the accompanying drawings.
Example (b): an explosion-proof electromagnetic flowmeter, as shown in fig. 1 and fig. 2, comprises a connecting pipeline 1 and electrodes 2 arranged on the connecting pipeline 1 in pairs, wherein the outer periphery of the connecting pipeline 1 is provided with a hollow cylindrical protective shell 8, an explosion-proof cavity A9 is formed between the connecting pipeline 1 and the protective shell 8, an electromagnetic coil 10 (as shown in fig. 4) is arranged in the explosion-proof cavity A9, and the protective shell 8 can well protect the stability of the electrodes 2 and the electromagnetic coil 10 in the installation and use processes; simultaneously, fixedly connected with pipe 11 on the protecting crust 8, be formed with explosion-proof chamber B12 in the pipe 11, pipe 11 keeps away from the one end fixedly connected with flange piece A13 of protecting crust 8, the flange piece B14 of fixedly connected with and flange piece A13 bolted connection on casing 3 on connecting tube 1 upper portion sets up, threaded connection has two terminal 6 on casing 3's the outer wall, be formed with explosion-proof chamber C20 in the terminal 6, explosion-proof chamber C20 is worn to establish by cable 7, and extend outside terminal 6. Through the polyurethane insulation pouring sealant with excellent sealing performance and insulating performance filled in the explosion-proof cavity A9, the explosion-proof cavity B12 and the explosion-proof cavity C20, the cable 7 can be effectively isolated from the external environment so as to increase the insulating performance of the cable 7, thereby improving the explosion-proof performance of the electromagnetic flowmeter and ensuring the safe operation of the electromagnetic flowmeter.
As shown in fig. 2 and fig. 3, a boss 15 is connected to a side of the flange a13 away from the guide tube 11, a groove 16 (not shown in the figure) for inserting the boss 15 is formed on the flange B14, a thread-type flameproof junction surface 17 is formed along the periphery of the groove wall of the groove 16, the periphery of the boss 15 is matched with the flameproof junction surface 17, and the flameproof junction surface 17 is required to have a width not less than 12.5mm, a gap not more than 0.15mm, a number of joggles not less than 5 and a screwing depth not less than 8mm, and the boss 15 is inserted into the groove 16 and connected with the flameproof junction surface 17, so that the boss 15 is tightly and firmly clamped in the groove 16, and the connection strength between the flange a13 and the flange B14 is improved, thereby ensuring the stability and safety of the whole use of the electromagnetic. Meanwhile, the front opening end and the rear opening end of the shell 3 are in threaded connection with the front end cover 4 and the rear end cover 5, and the connection surface of the shell 3, the front end cover 4 and the rear end cover 5 is also an explosion-proof junction surface 17, so that the explosion-proof performance of the electromagnetic flowmeter can be further improved.
As shown in fig. 2 and 5, in order to timely sense the overheating of the cable 7 during the abnormal operation, a temperature fuse 18 may be disposed in the explosion-proof chamber a9, and the temperature fuse 18 is connected in series to the cable 7, so as to protect the circuit by the self-fusing safety cut of the temperature fuse 18, thereby avoiding the expansion of the circuit fault or the occurrence of fire, and thus ensuring the safe operation of the electromagnetic flowmeter. Meanwhile, the magnetic field shielding layer 21 made of silicon steel is arranged on the inner surface of the protective shell 8 along the periphery to shield the interference of an external magnetic field on the electromagnetic coil 10, so that the stability of the internal magnetic field of the electromagnetic flowmeter is effectively ensured, and the measurement accuracy of the electromagnetic flowmeter is ensured.
As shown in fig. 2 and 3, the inert gas chamber 22 filled with nitrogen for protection formed in the housing 3 can reduce the possibility of air around the cable 7, so that the cable 7 lacks the necessary condition for generating a fire source, thereby improving the explosion-proof performance and the use safety of the electromagnetic flowmeter; in order to avoid the direct contact between the cable 7 and the external environment and further improve the explosion-proof performance of the electromagnetic flowmeter, a layer of polyvinyl chloride (PVC) insulating sleeve 19 can be wrapped on the outer surface of the part of the cable 7 extending out of the binding post 6, and meanwhile, the insulating sleeve 19 can also prevent the cable 7 from being damaged by the external environment or man-made damage, so that the safety and stability of the normal work of the cable 7 are protected.
As shown in fig. 1, in order to enhance the structural strength between the protective shell 8 and the connecting pipe 1, a plurality of stainless steel reinforcing plates 23 can be arranged between two end faces of the protective shell 8 and the connecting pipe 1 along the periphery, so as to ensure the use safety of the electromagnetic flowmeter and prolong the service life of the electromagnetic flowmeter.
The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications of the present embodiment with inventive contribution as required after reading the present specification, but all of them are protected by patent law within the scope of the claims of the present invention.
Claims (8)
1. An explosion-proof electromagnetic flowmeter which is characterized in that: comprises a connecting pipeline (1), electrodes (2) arranged on the connecting pipeline (1) in pairs, a shell (3) arranged on the upper part of the connecting pipeline (1), a front end cover (4) and a rear end cover (5) which are in threaded connection with the front and rear open ends of the shell (3), wherein two binding posts (6) are in threaded connection with the outer wall of the shell (3), a cable (7) in the shell (3) penetrates through the binding posts (6) and extends out of the binding posts (6), a protective shell (8) is arranged on the outer peripheral edge of the connecting pipeline (1), an explosion-proof cavity A (9) is formed between the connecting pipeline (1) and the protective shell (8), an electromagnetic coil (10) is arranged in the explosion-proof cavity A (9), a guide pipe (11) is fixedly connected with the protective shell (8), an explosion-proof cavity B (12) is formed in the guide pipe (11), and a flange sheet A (13) is fixedly connected with one end, far away from the protective shell (8), of the, and a flange sheet B (14) in bolt connection with the flange sheet A (13) is fixedly connected to the shell (3).
2. The explosion-proof electromagnetic flow meter according to claim 1, characterized in that: one side of the flange piece A (13) far away from the guide pipe (11) is connected with a boss (15), a groove (16) for inserting the boss (15) is formed in the flange piece B (14), an explosion-proof joint surface (17) is formed on the groove wall of the groove (16) along the periphery, and the periphery of the boss (15) is matched with the explosion-proof joint surface (17).
3. The explosion-proof electromagnetic flow meter according to claim 1, characterized in that: a temperature fuse (18) is arranged in the explosion-proof cavity A (9), and the temperature fuse (18) is connected on the cable (7) in series.
4. The explosion-proof electromagnetic flow meter according to claim 1, characterized in that: the outer surface of the part of the cable (7) extending out of the binding post (6) is wrapped with an insulating sleeve (19).
5. The explosion-proof electromagnetic flow meter according to claim 4, characterized in that: an explosion-proof cavity C (20) is arranged in the binding post (6), and the cable (7) penetrates through the explosion-proof cavity C (20) and extends out of the binding post (6).
6. The explosion-proof electromagnetic flow meter according to claim 1, characterized in that: the inner surface of the protective shell (8) is covered with a magnetic field shielding layer (21) along the periphery.
7. The explosion-proof electromagnetic flow meter according to claim 1, characterized in that: an inert gas chamber (22) is formed in the shell (3), and the cable (7) is arranged in the inert gas chamber (22) in a penetrating mode.
8. The explosion-proof electromagnetic flow meter according to claim 1, characterized in that: and a plurality of reinforcing plates (23) are arranged between the two end faces of the protective shell (8) and the connecting pipeline (1) along the periphery.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920760074.3U CN209927192U (en) | 2019-05-24 | 2019-05-24 | Explosion-proof electromagnetic flowmeter |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN201920760074.3U CN209927192U (en) | 2019-05-24 | 2019-05-24 | Explosion-proof electromagnetic flowmeter |
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| Publication Number | Publication Date |
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| CN209927192U true CN209927192U (en) | 2020-01-10 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN201920760074.3U Active CN209927192U (en) | 2019-05-24 | 2019-05-24 | Explosion-proof electromagnetic flowmeter |
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| CN (1) | CN209927192U (en) |
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022150943A1 (en) * | 2021-01-12 | 2022-07-21 | Micro Motion, Inc. | Interface with improved accessibility |
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2019
- 2019-05-24 CN CN201920760074.3U patent/CN209927192U/en active Active
Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| WO2022150943A1 (en) * | 2021-01-12 | 2022-07-21 | Micro Motion, Inc. | Interface with improved accessibility |
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