CN216283726U

CN216283726U - Ultrasonic flowmeter transducer mounting structure

Info

Publication number: CN216283726U
Application number: CN202122577420.4U
Authority: CN
Inventors: 涂杰; 张军; 吴小川; 刘显峰
Original assignee: Qianwei Meters Chongqing Co Ltd
Current assignee: Qianwei Meters Chongqing Co Ltd
Priority date: 2021-10-26
Filing date: 2021-10-26
Publication date: 2022-04-12
Anticipated expiration: 2031-10-26

Abstract

The utility model discloses an ultrasonic flowmeter transducer mounting structure which comprises a shell, wherein a flow channel is arranged in the shell along the axial direction of the shell, the shell is provided with ultrasonic transducers which are symmetrically arranged on two sides of the flow channel in pairs, the ultrasonic transducers are detachably arranged on the shell through a protection assembly, the protection assembly comprises a pressure-bearing nut seat and a locking screw sleeve, the pressure-bearing nut seat and the locking screw sleeve are encircled to form a positioning cavity which is adaptive to the ultrasonic transducers and can expose the heads of the ultrasonic transducers, the pressure-bearing nut seat is provided with a sealing structure for a connecting wire of the ultrasonic transducers to penetrate out, and the pressure-bearing nut seat is in threaded fit with the shell. The ultrasonic transducer pressure-bearing capacity in the flowmeter is enhanced, the mounting efficiency of the transducer is improved, the sealing performance of the mounting position and the connecting line penetrating position is improved, the structure is simple, the implementation is convenient, and the whole service life of the flowmeter is prolonged.

Description

Ultrasonic flowmeter transducer mounting structure

Technical Field

The utility model belongs to the field of flow meter structures, and particularly relates to an ultrasonic flow meter transducer mounting structure.

Background

The ultrasonic flowmeter is widely applied to various fields such as chemical industry, water conservancy, petroleum, natural gas, medical treatment and the like due to the advantages of non-contact and high precision, the principle of the ultrasonic flowmeter is that when ultrasonic waves propagate in a fluid, the propagation speed of the ultrasonic waves is changed under the influence of the flow velocity of the fluid, so that the flow velocity of the fluid can be calculated by measuring ultrasonic signals passing through the fluid, and a commonly adopted measuring method is a time difference method. A pair of oppositely emitting transducers are typically arranged on opposite sides of the fluid conduit, with ultrasonic waves being emitted from one transducer and received at the other, and the flow rate of the fluid being calculated by detecting the difference in transit time between the ultrasonic waves in forward and reverse flow.

The transducer is an important part in the ultrasonic flowmeter, and the whole flowmeter is extremely easy to scrap once the flowmeter fails, because the transducer is directly contacted with fluid in the flowmeter, the transducer can inevitably receive circumferential and axial pressure applied by the fluid.

SUMMERY OF THE UTILITY MODEL

In view of this, the utility model provides an ultrasonic flowmeter transducer mounting structure, which is used for solving the problems that an existing ultrasonic flowmeter transducer is inconvenient to mount, weak in pressure bearing capacity, short in service life and the like.

The technical scheme is as follows:

the utility model provides an ultrasonic flowmeter transducer mounting structure, includes the casing, has the runner of following its axial setting in the casing, the casing has the symmetry and sets up the ultrasonic transducer in the runner both sides in pairs, and its key lies in: the ultrasonic transducer is detachably arranged on the shell through the protection assembly, the protection assembly comprises a pressure-bearing nut seat and a locking threaded sleeve, the pressure-bearing nut seat and the locking threaded sleeve surround to form a positioning cavity which is adaptive to the ultrasonic transducer and can expose the head of the ultrasonic transducer, the pressure-bearing nut seat is provided with a sealing structure for the connection line of the ultrasonic transducer to penetrate out, and the pressure-bearing nut seat is in threaded fit with the shell.

By adopting the scheme, the problems of installation, pressure-bearing sealing protection and the like of the transducer are solved by the pressure-bearing nut seat and the locking thread sleeve, the structure is simple and feasible, the implementation is convenient, the manufacturing cost is low, and the installation efficiency of the transducer and the whole service life of the flowmeter are favorably improved.

Preferably, the method comprises the following steps: the bearing nut seat comprises a matching section, an installation section and a pressing head which are coaxially arranged, wherein the matching section is provided with an external thread matched with the locking threaded sleeve, the installation section is provided with an external thread matched with the shell, the diameters of the pressing head, the matching section and the installation section are sequentially increased, the installation section is provided with a wire passing hole matched with a connecting wire, the pressing head is provided with a locking hole communicated with the wire passing hole, the inner side wall of the locking hole is provided with an internal thread, and a pressing screw matched with the internal thread is configured. By adopting the scheme, each section of the structure of the pressure-bearing nut seat is reasonably designed according to needs, so that the lightweight integral structure is facilitated, and meanwhile, the connection strength, the sealing requirements and the like are met.

Preferably, the method comprises the following steps: have between installation section and the pressure head and be annular sealed dish, the sealed dish is along the radial setting of pressure-bearing nut seat, and its edge has the turn-ups that extends towards the location chamber, the turn-ups encloses with the installation section and forms annular seal groove to dispose the sealing washer that adapts to with this annular seal groove, turn-ups and sealing washer all offset with the casing. By adopting the scheme, the sealing performance between the pressure-bearing nut seat and the shell can be improved, and the leakage of fluid in the flow channel is prevented.

Preferably, the method comprises the following steps: the matching section is internally provided with a positioning sink groove matched with the tail end of the ultrasonic transducer, and the inner end of the front end of the locking threaded sleeve is provided with a step-shaped positioning step matched with the head end of the ultrasonic transducer. By adopting the scheme, the stability of the transducer in the positioning cavity can be improved, so that the measurement precision is ensured.

Preferably, the method comprises the following steps: the bottom of the positioning sinking groove is provided with convex parts which are uniformly distributed along the circumferential direction of the positioning sinking groove. By adopting the scheme, the tail end of the transducer is abutted against the boss when the pressure transducer is used, so that redundant space is reserved between the end part of the transducer and the bottom wall of the positioning sinking groove, on one hand, the connecting wire can move, the situation that the connecting wire is directly contacted with the end part of the wire passing hole to generate friction and damage the connection reliability is avoided, and on the other hand, a larger pressure balance space is formed.

Preferably, the method comprises the following steps: the locking screw sleeve is provided with a pressure balance hole arranged along the circumferential direction of the locking screw sleeve, and a gap is reserved between the end part of the matching section and the stepped positioning step. By adopting the scheme, the static pressure balance inside and outside the pressure-bearing nut seat is convenient to realize.

Preferably, the method comprises the following steps: the front end of the locking threaded sleeve is in a conical surface shape which is suitable for the head end of the ultrasonic transducer. By adopting the scheme, the impact of the fluid on the locking threaded sleeve can be relieved, and meanwhile, the weight of the part can be reduced while the energy converter is protected due to the adaptive shape.

Preferably, the method comprises the following steps: the locking hole diameter is greater than the line hole diameter, has the transition cushion rather than the adapted in it, the perforation that has the line with the connecting wire to adapt to on the transition cushion, be equipped with the pressure rubber mat between housing screw and the transition cushion, the pressure rubber mat both ends respectively with transition cushion and housing screw counterbalance. By adopting the scheme, the transition rubber mat and the pressing rubber mat are mutually matched, so that the sealing performance and double sealing of the penetrating part of the connecting wire are improved.

Preferably, the method comprises the following steps: the compressing head is in a petal shape, and a channel which is arranged along the radial direction of the compressing head and penetrates through the compressing head to the locking hole is arranged on the compressing head. By adopting the scheme, the requirement on screw fastening is met, a plurality of channels in different directions are formed simultaneously, and the wiring requirements of connecting wires in different directions are met.

Preferably, the method comprises the following steps: the two sides of the shell are provided with side mounting cavities for mounting the ultrasonic transducer, side covers matched with the side mounting cavities are arranged, and the side covers are flush with the outer surface of the shell. By adopting the scheme, the overall compactness and the appearance quality of the flowmeter are improved, and the touch damage risk is reduced.

Compared with the prior art, the utility model has the beneficial effects that:

the mounting structure of the transducer of the ultrasonic flowmeter is beneficial to enhancing the bearing capacity of the ultrasonic transducer in the flowmeter, simultaneously improving the mounting efficiency of the transducer, the sealing performance of the mounting part and the penetrating part of the connecting wire and the like, has simple structure, is convenient to implement, and is also beneficial to prolonging the service life of the whole flowmeter.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a schematic view of the structure of the present invention (side cover removed);

FIG. 3 is a cross-sectional view of the housing;

FIG. 4 is a schematic view of the transducer mounting;

FIG. 5 is an exploded view of FIG. 4;

FIG. 6 is a cross-sectional view of FIG. 4;

fig. 7 is a schematic structural view of a pressure-bearing nut seat.

Detailed Description

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

Referring to fig. 1 to 7, the transducer mounting structure of an ultrasonic flowmeter mainly includes a housing 1, a flow channel 2 disposed along an axial direction of the housing 1 is provided in the housing 1, two ends of the housing 1 are provided with connecting flanges 12 symmetrically disposed, a control box group 13 is provided at a top of the housing 1, the housing 1 is provided with ultrasonic transducers 3 symmetrically disposed on two sides of the flow channel 2 in pairs, the ultrasonic transducers 3 are detachably disposed on the housing 1 through a protection component 4, and in particular, the ultrasonic transducers 3 are disposed on left and right sides of the housing 1 along the axial direction of the flow channel 2.

The protection assembly 4 comprises a pressure-bearing nut seat 40 and a locking thread sleeve 41, the pressure-bearing nut seat 40 and the locking thread sleeve 41 are encircled to form a positioning cavity 42 which is matched with the ultrasonic transducer 3 and can expose the head of the ultrasonic transducer, the ultrasonic transducer 3 is provided with a connecting wire 30 connected with the control box group 13, the pressure-bearing nut seat 40 is provided with a sealing structure for the connecting wire 30 to penetrate out, particularly, the sealing structure can be used for the connecting wire 30 to penetrate out and sealing the penetrating part, the integral sealing performance is improved, and the pressure-bearing nut seat 40 is in threaded fit with the shell 1.

Referring to fig. 3 to 7, the pressure-bearing nut seat 40 is a revolving body structure, and mainly includes a matching section 400, an installation section 401 and a pressing head 402, which are coaxially disposed, wherein the matching section 400 has an external thread matching with the locking thread sleeve 41, the installation section 401 has an external thread matching with the housing 1, the side wall of the housing 1 has an installation hole 14 adapted to the pressure-bearing nut seat 40, the diameters of the pressing head 402, the matching section 400 and the installation section 401 are sequentially increased, the middle portion of the installation section 401 has a wire through hole 403 adapted to the connecting wire 30, the wire through hole 403 is coaxially disposed with the installation section 401, the pressing head 402 has a locking hole 404 penetrating through the wire through hole 403, the inner side wall of the locking hole 404 has an internal thread, and a pressing screw 43 adapted thereto is disposed.

The sealing structure in this embodiment mainly includes the above-mentioned compression screw 43, the transition rubber pad 45 and the compression rubber pad 46, as shown in the figure, the diameter of the locking hole 404 is greater than the diameter of the wire passing hole 403, the diameter of the transition rubber pad 45 is slightly greater than the diameter of the locking hole 404, the transition rubber pad 45 is in interference fit with the locking hole 404, the transition rubber pad 45 is provided with a through hole 450 adapted to the connection wire 30, the connection wire 30 is also in interference fit with the through hole 450, the compression rubber pad 46 is located between the transition rubber pads 45 and provided between the compression rubber pads 46, and is also in interference fit with the locking hole 404, and two ends of the compression rubber pad are respectively abutted against the transition rubber pad 45, so that when the connection wire 30 passes through, multi-stage sealing of the passing-through portion can be realized through the compression rubber pad 46 and the transition rubber pad 45, and relatively speaking, the operation is more convenient and reliable.

On this basis, the overall compressing head 402 is of a petal-shaped structure, the channel 47 which is radially arranged along the compressing head and penetrates through the compressing head to the locking hole 404 is arranged on the compressing head, and the channel 47 is uniformly distributed along the circumferential direction of the locking hole 404, so that the requirement of multi-direction routing can be met, and the bending of the connecting line 30 is reduced.

In the application, in order to improve the overall compactness of the flowmeter, both sides of the casing 1 are provided with lateral mounting cavities 10 for mounting the ultrasonic transducers 3, the lateral mounting cavities 10 are of a sink groove structure, and are provided with side covers 11 matched with the lateral mounting cavities 10, and the side covers 11 are flush with the outer surface of the casing 1.

Meanwhile, an annular sealing disc 405 is arranged between the mounting section 401 and the pressing head 402, the sealing disc 405 is arranged along the radial direction of the pressure-bearing nut seat 40, the outer edge of the sealing disc is provided with a flange 406 extending towards the positioning cavity 42, the flange 406 and the mounting section 401 surround to form an annular sealing groove 407, a sealing ring 44 adaptive to the annular sealing groove 407 is configured, an annular matching surface 15 is arranged on the circumferential outer side of the mounting hole 14 in the side mounting cavity 10, and after the mounting is completed, the flange 406 and the sealing ring 44 are both abutted against the annular matching surface 15, so that the sealing of the connection part of the two is realized.

Have the heavy groove 408 of location that suits with ultrasonic transducer 3 tail end in the cooperation section 400, locking swivel nut 41's front end inner has the echelonment location step 410 that suits with ultrasonic transducer 3 head end, the axial positioning of ultrasonic transducer 3 is realized through the cooperation of the heavy groove 408 of location and location step 410, during concrete implementation, the heavy groove 408 bottom of location has along its circumference evenly distributed's bellying 409, make after the installation is accomplished like this, ultrasonic transducer 3's bottom is not with the diapire direct contact of the heavy groove 408 of location, even like this ultrasonic transducer 3 has little deviation, connecting wire 30 also can not receive the touching with ultrasonic transducer 3's connecting portion position.

On the basis, in the embodiment, the locking nut 41 has the pressure balance holes 411 uniformly distributed along the circumferential direction thereof, a gap is left between the end of the matching section 400 and the stepped positioning step 410, that is, the front end of the matching end 400 does not abut against the locking nut 41, the front end of the locking nut 41 has a conical surface shape adapted to the head end of the ultrasonic transducer 3, meanwhile, the shape of one end of the mounting hole 14 close to the flow channel 2 is adapted to the front end of the locking nut 41, and after the mounting is completed, the front end of the locking nut 41 abuts against the front end of the mounting hole 14.

Referring to the ultrasonic flowmeter transducer mounting structure shown in fig. 1 to 7, during installation, after the ultrasonic transducer 3 and the protection component 4 are assembled, the ultrasonic flowmeter transducer mounting structure is quickly installed in the mounting hole 14, and then connected with the control box set 13 through the connecting wire 30, and finally the side cover 11 is sealed, so that the mounting structure is quick and convenient, has excellent reliability, and simultaneously, because the ultrasonic transducer 3 and the connecting wire 30 are protected and sealed by the protection component 4, the bearing capacity of the mounting structure is greatly improved, and the service life of the mounting structure is prolonged.

Finally, it should be noted that the above-mentioned description is only a preferred embodiment of the present invention, and those skilled in the art can make various similar representations without departing from the spirit and scope of the present invention.

Claims

1. The utility model provides an ultrasonic flowmeter transducer mounting structure, includes casing (1), has runner (2) along its axial setting in casing (1), casing (1) has the symmetry and sets up in pairs in ultrasonic transducer (3) of runner (2) both sides, its characterized in that: ultrasonic transducer (3) set up on casing (1) with the mode of dismantling through protection subassembly (4), protection subassembly (4) are including pressure-bearing nut seat (40) and locking swivel nut (41), pressure-bearing nut seat (40) and locking swivel nut (41) surround form with ultrasonic transducer (3) suit and can supply location chamber (42) that its head exposes, pressure-bearing nut seat (40) have the seal structure that connecting wire (30) that supply ultrasonic transducer (3) worn out, pressure-bearing nut seat (40) and casing (1) screw-thread fit.

2. An ultrasonic flow meter transducer mounting structure according to claim 1, wherein: the bearing nut seat (40) comprises a matching section (400), an installation section (401) and a pressing head (402) which are coaxially arranged, wherein the matching section (400) is provided with an external thread matched with the locking thread sleeve (41), the installation section (401) is provided with an external thread matched with the shell (1), the diameters of the pressing head (402), the matching section (400) and the installation section (401) are sequentially increased, the installation section (401) is provided with a wire passing hole (403) matched with the connecting wire (30), the pressing head (402) is provided with a locking hole (404) communicated with the wire passing hole (403), and the inner side wall of the locking hole (404) is provided with an internal thread and is provided with a pressing screw (43) matched with the internal thread.

3. An ultrasonic flow meter transducer mounting structure according to claim 2, wherein: have between installation section (401) and the pressure head (402) and be annular sealed dish (405), sealed dish (405) are along the radial setting of pressure-bearing nut seat (40), and its outer fringe has turn-ups (406) towards location chamber (42) extension, turn-ups (406) encircle with installation section (401) and form annular seal groove (407) to dispose sealing washer (44) with this annular seal groove (407) adaptation, turn-ups (406) and sealing washer (44) all offset with casing (1).

4. An ultrasonic flow meter transducer mounting structure according to claim 2, wherein: the matching section (400) is internally provided with a positioning sinking groove (408) matched with the tail end of the ultrasonic transducer (3), and the inner end of the front end of the locking threaded sleeve (41) is provided with a stepped positioning step (410) matched with the head end of the ultrasonic transducer (3).

5. The ultrasonic flow meter transducer mounting structure of claim 4, wherein: the bottom of the positioning sunken groove (408) is provided with convex parts (409) which are uniformly distributed along the circumferential direction of the positioning sunken groove.

6. The ultrasonic flow meter transducer mounting structure according to claim 4 or 5, wherein: the locking screw sleeve (41) is provided with a pressure balance hole (411) arranged along the circumferential direction of the locking screw sleeve, and a gap is reserved between the end part of the matching section (400) and the stepped positioning step (410).

7. The ultrasonic flow meter transducer mounting structure according to claim 4 or 5, wherein: the front end of the locking threaded sleeve (41) is in a conical surface shape matched with the head end of the ultrasonic transducer (3).

8. The ultrasonic flow meter transducer mounting structure of claim 3, wherein: the diameter of the locking hole (404) is larger than that of the wire passing hole (403), a transition rubber mat (45) matched with the locking hole is arranged in the locking hole, a through hole (450) matched with the connecting wire (30) is formed in the transition rubber mat (45), a pressing rubber mat (46) is arranged between the pressing screw (43) and the transition rubber mat (45), and two ends of the pressing rubber mat (46) are respectively abutted against the transition rubber mat (45) and the pressing screw (43).

9. The ultrasonic flow meter transducer mounting structure of claim 8, wherein: the pressing head (402) is in a petal shape, and a channel (47) which is arranged along the radial direction of the pressing head and penetrates through the locking hole (404) is arranged on the pressing head.

10. An ultrasonic flow meter transducer mounting structure according to claim 1, wherein: the ultrasonic transducer is characterized in that side mounting cavities (10) for mounting the ultrasonic transducer (3) are formed in two sides of the shell (1), side covers (11) matched with the side mounting cavities (10) are arranged, and the side covers (11) are flush with the outer surface of the shell (1).