CN218822546U

CN218822546U - Precession vortex gas flow piezoelectric sensor

Info

Publication number: CN218822546U
Application number: CN202220081707.XU
Authority: CN
Inventors: 张雪萌
Original assignee: Weihai Xingdong Instrument Co ltd
Current assignee: Weihai Xingdong Instrument Co ltd
Priority date: 2022-01-10
Filing date: 2022-01-10
Publication date: 2023-04-07
Anticipated expiration: 2032-01-10

Abstract

The utility model relates to a flow sensor field specifically is precession vortex formula gas flow piezoelectric sensor, be equipped with the cavity shell, the top outside of shell is equipped with the sleeve pipe, the sleeve pipe inboard is equipped with the signal line, the shell is inside to be equipped with piezoelectric element from bottom to top in proper order, conducting block down, insulating gasket, go up conducting block and jackscrew, wherein, conducting block down, insulating gasket, it is hollow structure to go up conducting block and jackscrew, be equipped with first signal conductor and second signal conductor in the shell, first signal conductor one end and conducting block looks fixed connection down, the first signal conductor other end passes hollow structure and signal line fixed connection, second signal conductor one end and last conducting block fixed connection, the second signal conductor other end passes hollow structure and signal line fixed connection, the signal line other end wears out the shell with the signal line from the sleeve pipe, the inside upside of shell, the pipe box inboard is all sealed fixedly through the potting adhesive, have the convenient observation and detect the welding circuit condition, effectively prevent that the signal line from being dragged advantage such as.

Description

Precession vortex gas flow piezoelectric sensor

Technical Field

The utility model relates to a flow sensor technical field specifically is a precession vortex formula gas flow piezoelectric transducer.

Background

An ultrasonic flowmeter is a device for measuring the flow rate of a fluid such as gas or liquid, and an ultrasonic sensor is one of key parts of the ultrasonic flowmeter.

The Chinese patent discloses a precession vortex type gas flow piezoelectric sensor with the patent name of CN202020105949.9, and particularly discloses a precession vortex type gas flow piezoelectric sensor which comprises a shell and a high-temperature shielding sheath wire, wherein the shell is connected with an adjusting screw through an internal thread, and a piezoelectric element and an insulating gasket are sequentially connected between the shell and the adjusting screw; the adjusting screw and the insulating gasket are both of hollow structures, and hollow insulating sleeves are uniformly distributed in the hollow structures; the negative wire of the high-temperature shielding sheath wire is electrically connected with the adjusting screw, and the signal core wire of the high-temperature shielding sheath wire penetrates through the hollow insulating sleeve to be electrically connected with the positive electrode of the piezoelectric element; the inside embedment of shell rear side has high temperature resistant dampproofing epoxy, and the outside threaded connection in top of shell has the protective sheath. The utility model uses adjusting screw to pre-stress the piezoelectric ceramic element without adhesive, with high sensitivity, good consistency and uneasy cracking; the shell adopts an integrated design, does not need threaded connection or laser welding, and has good sealing property, safety and reliability.

However, in the actual use process, the contact area between the piezoelectric crystal screwed into the vortex sensor and the signal lead is small and easy to break, so that the sensor has no signal due to poor contact; in addition, the insulating sleeve is arranged in the shell, so that the short circuit caused by welding is difficult to observe and detect.

SUMMERY OF THE UTILITY MODEL

In order to solve the above problem, the utility model provides a conveniently observe and detect the welding circuit condition, can effectively prevent that signal line from being dragged a precession swirl gas flow piezoelectric sensor who tears.

In order to realize the above functions, the utility model discloses following technical scheme will be adopted:

the utility model provides a precession vortex flowmeter sensor, be equipped with hollow shell, the top outside of shell (1) is equipped with sleeve pipe (10), sleeve pipe (10) inboard is equipped with signal line (9), a serial communication port, shell (1) inside is equipped with piezoelectric element (2) from bottom to top in proper order, lower conducting block (3), insulating pad (4), go up conducting block (5) and jackscrew (6), wherein, lower conducting block (3), insulating pad (4), go up conducting block (5) and jackscrew (6) are hollow structure, be equipped with first signal wire (7) and second signal wire (8) in the shell, first signal wire (7) one end and lower conducting block (3) looks fixed connection, first signal wire (7) other end passes hollow structure and signal line (9) fixed connection, second signal wire (8) one end and last conducting block (5) fixed connection, the second signal wire (8) other end passes hollow structure and signal line (9) fixed connection, signal line (9) other end is with signal line (9) from the sleeve pipe (10) upside, the inside potting compound glue that seals that all wears out, the cover (11).

First signal wire (7) one end and lower conducting block (3) welding, the first signal wire (7) other end passes hollow structure and signal line (9) welding, second signal wire (8) one end and last conducting block (5) welding, the second signal wire (8) other end passes hollow structure and signal line (9) welding.

First signal conductor (7) and second signal conductor (8) and signal line (9) welding and welding department sheathe in insulation support (12) to cause the short circuit when preventing threading and wiring.

The shell in be equipped with temperature sensor (13), temperature sensor (13) are connected with the outside through signal conductor (14).

Temperature sensor is located the shell casing of jackscrew upper end, and it is fixed through casting glue (11) potting, with inside the casing of temperature sensor simultaneous encapsulation, saved on-the-spot other trompil installation temperature sensor, or the work of flowmeter body trompil installation temperature sensor in addition, ageing and work efficiency have very big improvement, have also avoided the probability because of the leak source that many openings brought.

The utility model discloses increased two conducting blocks of conducting block and lower conducting block on assembly process, the size of conducting block has covered the whole surface of piezoelectric element and has made its abundant contact with piezoelectric element, reuse welded mode, with the signal line welding on the conducting block rather than with gluing can effectually prevent coming off of signal line, make the line connection more reliable, can not appear when going up the jackscrew because of direct extrusion wire, cause the wire to break and crowd absolutely, guaranteed that the wire doubles firmly with piezoelectric element, also can not cause because the short circuit that comes unstuck after the live time; meanwhile, the connecting area of the piezoelectric element is increased; and a signal wire needing to be welded is led to the outside, so that the detection is convenient. In addition, in order to prevent the drawn signal wire from being pulled and torn, the sleeve and the wire are clamped by a tool clamp above the sleeve so as to fix the position of the signal wire, prevent pulling and enable the signal wire to be firmer.

Drawings

Fig. 1 is a schematic view of the overall structure of the present invention.

Fig. 2 is another schematic structural diagram of the present invention.

In the figure: 1. a housing; 2. a piezoelectric element; 3. a conductive block; 4. an insulating spacer; 5. a conductive block; 6. carrying out top thread; 7. a signal conductor; 8. a signal conductor; 9. a signal line; 10. a sleeve; 11. pouring a sealant; 12. an insulating sleeve; 13. a temperature sensor; 14. a third signal conductor.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

The utility model provides a precession vortex flowmeter sensor, be equipped with hollow shell, the top outside of shell (1) is equipped with sleeve pipe (10), sleeve pipe (10) inboard is equipped with signal line (9), a serial communication port, shell (1) inside is equipped with piezoelectric element (2) from bottom to top in proper order, lower conducting block (3), insulating pad (4), go up conducting block (5) and jackscrew (6), wherein, lower conducting block (3), insulating pad (4), go up conducting block (5) and jackscrew (6) are hollow structure, be equipped with first signal wire (7) and second signal wire (8) in the shell, first signal wire (7) one end and lower conducting block (3) looks fixed connection, preferably the welding, first signal wire (7) other end passes hollow structure and signal line (9) fixed connection, preferably the welding, second signal wire (8) one end and last conducting block (5) fixed connection, the other end of second signal wire (8) passes hollow structure and signal line (9) fixed connection, preferably for the welding, the other end is the potting dress is gone out the signal line (9) from the shell (9), the inside pot seals the sleeve pipe (10) is sealed, the sleeve pipe (10) is all sealed.

Preferably, the first signal conductor (7) and the second signal conductor (8) are welded with the signal wire (9), and an insulating sleeve (12) is sleeved on the welding position, so that the short circuit cannot be caused by the convenience of early threading and later wiring.

Preferably, a temperature sensor (13) is arranged in the shell, and the temperature sensor (13) is connected with the outside through a third signal lead (14).

Preferably, the temperature sensor is located in the shell body at the upper end of the jackscrew, and is sealed and fixed through the pouring sealant (11), the temperature sensor is sealed and installed in the shell body at the same time, so that the work of installing the temperature sensor by additionally opening holes on the site or installing the temperature sensor by additionally opening holes on the flowmeter body is omitted, the aging efficiency and the working efficiency are greatly improved, and the probability of leakage points caused by multiple openings is also avoided.

The utility model discloses increased two conducting blocks of conducting block and lower conducting block on assembly process, the size of conducting block has covered the whole surface of piezoelectric element and has made its abundant contact with piezoelectric element, reuse welded mode, with signal line welding on the conducting block rather than with gluing can effectively prevent coming off of signal line, make the line connection more reliable, can not appear because of directly extruding the wire when going up the jackscrew, lead wire disconnection is crowded absolutely, guaranteed that the wire doubles firmly with piezoelectric element, also can not cause the short circuit because of the live time comes unstuck after a long time; meanwhile, the connecting area of the piezoelectric element is increased; and a signal wire needing to be welded is led to the outside, so that the detection is convenient. In addition, in order to prevent the drawn signal wire from being pulled and torn, the sleeve and the wire are clamped by a tool pliers above the sleeve to fix the position of the signal wire, prevent pulling and make the signal wire more firm.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a precession swirl gas flow piezoelectric transducer, be equipped with hollow shell, the top outside of shell (1) is equipped with sleeve pipe (10), sleeve pipe (10) inboard is equipped with signal line (9), a serial communication port, shell (1) inside is equipped with piezoelectric element (2) from bottom to top in proper order, lower conducting block (3), insulating pad (4), go up conducting block (5) and jackscrew (6), wherein, lower conducting block (3), insulating pad (4), go up conducting block (5) and jackscrew (6) are hollow structure, be equipped with first signal wire (7) and second signal wire (8) in the shell, first signal wire (7) one end and lower conducting block (3) looks fixed connection, first signal wire (7) other end passes hollow structure and signal line (9) fixed connection, second signal wire (8) one end and last conducting block (5) fixed connection, the second signal wire (8) other end passes hollow structure and signal line (9) fixed connection, the signal line (9) other end is worn out signal line (9) from the sleeve pipe (10) upside, the inside potting compound glue pot (11) is sealed all sealed to the shell, the pipe sleeve pipe cover is inboard.

2. A precession vortex gas flow piezoelectric transducer according to claim 1, characterised in that one end of the first signal wire (7) is welded to the lower conductive block (3), the other end of the first signal wire (7) is welded to the signal wire (9) through the hollow structure, one end of the second signal wire (8) is welded to the upper conductive block (5), and the other end of the second signal wire (8) is welded to the signal wire (9) through the hollow structure.

3. A precession vortex gas flow piezoelectric sensor according to claim 1, characterised in that the first signal conductor (7) and the second signal conductor (8) are welded to the signal wire (9) and the welding is covered by an insulating sleeve (12).

4. A precession vortex gas flow piezoelectric transducer according to claim 1, characterised in that a temperature sensor (13) is provided in the housing, the temperature sensor being connected to the outside via a third signal conductor (14).

5. A precession vortex gas flow piezoelectric transducer according to claim 1, characterised in that the temperature sensor is located in the housing at the upper end of the jackscrew, and is sealed and fixed by a potting compound (11).