CN112217075B

CN112217075B - Cable sealing assembly method for ultrasonic flow sensor

Info

Publication number: CN112217075B
Application number: CN202011135946.0A
Authority: CN
Inventors: 陈维厅; 林芳芬; 刘其钏; 刘春晓
Original assignee: Zhejiang Cangnan Instrument Group Dongxing Intelligent Instrument Co ltd
Current assignee: ZHEJIANG CANGNAN INSTRUMENT GROUP DONGXING INTELLIGENT INSTRUMENT CO.,LTD.
Priority date: 2020-10-22
Filing date: 2020-10-22
Publication date: 2022-01-25
Anticipated expiration: 2040-10-22
Also published as: CN112217075A

Abstract

The invention relates to the field of cable assembly, in particular to a cable sealing assembly method for an ultrasonic flow sensor, which comprises the following steps: step S1: providing a cable assembly component for an ultrasonic flow sensor, and plugging a plug post on a connector insertion tube; step S2: rotating the rotary valve to the position of the non-sealing through groove to enable the through groove to be communicated with the outside; step S3: rotating the sealing sleeve to enable the sealing sleeve to be in threaded connection with the threaded pipe; step S4: when an operator feels that the rotating force of the sealing sleeve obviously begins to increase gradually, the sealing sleeve stops rotating; step S5: rotating the rotary valve to the through groove, and sealing the through groove through the rotary valve; step S6: and rotating the gland again, and stopping rotating the gland when the operator feels that the rotating force of the gland obviously begins to increase gradually, so that the sealing assembly of the cable is completed.

Description

Cable sealing assembly method for ultrasonic flow sensor

Technical Field

The invention relates to the field of cable assembly, in particular to a cable sealing assembly method for an ultrasonic flow sensor.

Background

The ultrasonic flow sensor is a brand new universal time difference type multifunctional ultrasonic sensor designed by adopting a low-voltage multi-pulse balanced transmitting and receiving technology. Ultrasonic flow sensors are suitable for use in industrial environments to continuously measure the flow and heat of most clean, homogeneous liquids that do not contain large concentrations of suspended particles or gases. The method is widely applied to the aspects of factory sewage discharge monitoring, well cementation slurry flow measurement, oilfield oily sewage flow measurement, oil well water injection flow measurement, tap water flow measurement, industrial circulating water flow measurement, production process water consumption measurement, mineral separation pulp flow measurement, sodium aluminate and other process flow measurement and control, cooling circulating water flow measurement, generator set coil cooling water flow measurement, milk flow measurement and the like.

Generally, the ultrasonic flow sensor is connected and matched with a master control platform by inserting and matching a cable connector and an electrical connector arranged at the side of the ultrasonic flow sensor; because the ultrasonic flow sensor is generally applied to the detection of liquid flow and heat, in the use environment, the humidity in the air is relatively high, so that the electric connector and the cable connector are easily corroded by moisture to be damaged, the normal work of the ultrasonic flow sensor is influenced, and the service life of the ultrasonic flow sensor is shortened.

Disclosure of Invention

Solves the technical problem

Aiming at the defects in the prior art, the invention provides a cable sealing assembly method for an ultrasonic flow sensor, which can effectively solve the problems that the normal work of the ultrasonic flow sensor is influenced and the service life of the ultrasonic flow sensor is shortened due to the fact that the humidity in the air is high and the electric joint and the cable joint are easily corroded by moisture and damaged in the prior art.

Technical scheme

In order to achieve the purpose, the invention is realized by the following technical scheme:

a cable seal assembly method for an ultrasonic flow sensor, comprising the steps of:

step S1: providing a cable assembly component for an ultrasonic flow sensor, and plugging a plug post on a connector insertion tube;

step S2: rotating the rotary valve to the position of the non-sealing through groove to enable the through groove to be communicated with the outside;

step S3: rotating the sealing sleeve to enable the sealing sleeve to be in threaded connection with the threaded pipe;

step S4: when an operator feels that the rotating force of the sealing sleeve obviously begins to increase gradually, the sealing sleeve stops rotating;

step S5: rotating the rotary valve to the through groove, and sealing the through groove through the rotary valve;

step S6: and rotating the gland again, and stopping rotating the gland when the operator feels that the rotating force of the gland obviously begins to increase gradually, so that the sealing assembly of the cable is completed.

Furthermore, the cable assembly component for the ultrasonic flow sensor comprises a device body and a cable, wherein the right side wall of the device body is respectively provided with a threaded pipe and a connector insertion pipe, the connector insertion pipe is positioned at the axis of the threaded pipe, one end of the cable is provided with an insertion column which is in insertion fit with the connector insertion pipe, the outer side of the insertion column is in threaded connection with a sealing sleeve component, the sealing sleeve component comprises a sealing sleeve in threaded connection with the threaded pipe, a threaded sleeve which is arranged at the right side of the sealing sleeve and is in threaded connection with the insertion column and a wire fixing sleeve which is in threaded connection with the outer side of the circumference of the sealing sleeve, the outer side of the circumference of the sealing sleeve is provided with a threaded clamping groove, the circumferential side wall of the wire fixing sleeve is provided with a wire guide pipe, a left end thread of the inserted cable penetrates through the threaded sleeve and penetrates into the sealing sleeve, one end of the cable, which is far away from the insertion column, is clamped into the threaded clamping groove and penetrates out of the wire guide pipe, and a plurality of groups of contact pins which are electrically connected with the device body are uniformly arranged in the connector insertion pipe, the left side of the plug column is provided with a socket which is in plug fit with the connector insertion tube, the left side of the socket is uniformly provided with a pin groove which is in plug fit with the pin, the pin groove is internally provided with an electric guide sheet which is electrically connected with the cable, when the socket at the left end of the plug column is plugged in the connector insertion tube, the plug fit of the pin and the pin groove is realized, and further the electric connection of the device body and the cable is realized.

Furthermore, the inner wall of the threaded sleeve is provided with a threaded part and a smooth part, a sealing block is integrally arranged between the end part of one side, close to the threaded pipe, of the smooth part and the inserted column, the sealing sleeve comprises a horizontal part and a vertical part, a threaded clamping groove is formed in the horizontal part, the horizontal part is connected with the threaded sleeve through the vertical part, one side, close to the threaded pipe, of the vertical part is connected with a sealing spring, one side, far away from the vertical part, of the sealing spring is connected with a sealing baffle, the upper end and the lower end of the sealing baffle are respectively in sealing connection with the inner wall of the horizontal part and the outer wall of the threaded sleeve, a through groove is formed in the threaded sleeve, a rotary valve capable of rotating is arranged on the outer end side, far away from the threaded pipe, a net groove is formed in the smooth part, a first drying agent is contained in the net groove, and a containing groove is fixedly connected to the inner wall of the threaded pipe, accomodate the groove in and accomodate the second drier, it keeps away from to accomodate the groove the one end of sealing baffle is provided with sealed push pedal, it keeps away from to accomodate the groove the lower lateral wall of the one end of sealing baffle is provided with the check valve, it lies in to accomodate on the lower lateral wall in groove sealed push pedal with limiting plate between the check valve.

Furthermore, the circumferential side wall of the right part of the inserted column is provided with a first thread part in threaded fit with the thread sleeve, so that threaded connection between the inserted column and the seal sleeve is realized.

Furthermore, a wire clamping groove communicated with the thread clamping groove is formed in the right side of the sealing sleeve, so that a cable can be clamped into the thread clamping groove from the rightmost end of the thread clamping groove conveniently.

Furthermore, a second threaded part is arranged at the protruding part between every two adjacent threaded clamping grooves.

Furthermore, the inner side wall of the circumference of the wire fixing sleeve is provided with circular concave threads, the circular concave threads are in threaded fit with the positions of the cable convex thread clamping grooves, thread grooves in threaded fit with the second thread portions are formed between every two adjacent circular concave threads, the concave threads are in threaded fit with the positions of the cable convex thread clamping grooves, the cable is clamped into the thread clamping grooves conveniently, and threaded connection between the wire fixing sleeve and the circular concave threads is achieved through threaded fit of the two thread portions and the thread grooves.

Advantageous effects

Compared with the known public technology, the technical scheme provided by the invention has the following beneficial effects:

1. the ultrasonic flow sensor is simple in structure and convenient to operate, the plug post and the connector insertion tube are in a relatively sealed environment through the threaded matching of the sealing sleeve and the threaded pipe, so that moisture corrosion is reduced, the normal work of the flow sensor is guaranteed, the service life of the ultrasonic flow sensor is prolonged, meanwhile, the overlong cable is clamped into the threaded clamping groove through the rotating wire fixing sleeve, the service length of the cable can be adjusted according to the connecting length of the cable, and the situation that the overlong cable is messed outside the device body is avoided.

2. The space between the sealing sleeve and the inserted column can be reduced to the minimum by the matching action of the sealing spring, the sealing baffle, the through groove, the rotary valve, the first drying agent, the accommodating groove, the second drying agent, the sealing push plate, the one-way valve and the sealing block, so that the contained air and moisture thereof are reduced, and meanwhile, the drying degree in the sealing sleeve can be reduced to the maximum extent by matching the second drying agent, and the long-time moisture-proof effect is improved; and the second drier of cooperation can reduce the moisture in the clearance between contact pin and contact pin groove and socket and the post of inserting, further prevents the moisture between contact pin and the contact pin groove.

Drawings

In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings used in the description of the embodiments or the prior art will be briefly described below. It is obvious that the drawings in the following description are only some embodiments of the invention, and that for a person skilled in the art, other drawings can be derived from them without inventive effort.

FIG. 1 is a schematic view of the connection of a cable to a body according to the present invention;

FIG. 2 is a partial cross-sectional structural view of the cable to body connection of the present invention;

FIG. 3 is a schematic view of the structure of the device of the present invention;

FIG. 4 is a schematic view of the structure of the plug post and gland assembly of the present invention;

FIG. 5 is a schematic view of the thread-fixing sleeve structure of the present invention;

FIG. 6 is a detailed view of a portion of the cross-sectional structure of the cable to body connection of the present invention;

FIG. 7 is an enlarged view taken at A of FIG. 6 in accordance with the present invention;

FIG. 8 is an enlarged view taken at B of FIG. 6 in accordance with the present invention;

the reference numerals in the drawings denote: 1-a container body; 2-a cable; 3-a threaded pipe; 4-a joint cannula; 5-inserting a column; 6-sealing sleeve; 7-a thread bushing; 8-wire fixing sleeve; 9-a threaded clamping groove; 10-a conduit; 11-pin; 12-a socket; 13-a pin slot; 14-a first threaded portion; 15-a wire clamp slot; 16-a second threaded portion; 17-a concave circular helix; 18-thread groove; 19-a sealing spring; 20-sealing a baffle plate; 21-a through groove; 22-a rotary valve; 23-a first desiccant; 24-a receiving groove; 25-a second desiccant; 26-a sealing push plate; 27-a one-way valve; 28-sealing the block.

Detailed Description

In order to make the objects, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention. It is to be understood that the embodiments described are only a few embodiments of the present invention, and not all embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

The present invention will be further described with reference to the following examples.

Examples

A cable fitting assembly for an ultrasonic flow sensor of the present embodiment, with reference to fig. 1 to 5: including the ware body 1 and

cable

2, 1 right side wall of the ware body is provided with screwed pipe 3 and joint intubate 4 respectively, joint intubate 4 is located 3 axle centers of screwed pipe department, 2 one end of cable is provided with and inserts post 5 with 4 grafting complex of joint intubate, 5 outside threaded connection of post inserts has the sealed cover subassembly, the sealed cover subassembly includes the seal cover 6 with 3 threaded connection of screwed pipe, set up on the right side of seal cover 6 and with insert 5 threaded connection's thread bush 7 and the solidus cover 8 of threaded connection in the 6 circumference outside of seal cover, 6 circumference outside of seal cover is provided with

thread clamping groove

9, 8 circumference lateral walls of solidus cover be provided with conduit 10, it passes in the thread bush 7 and penetrates seal cover 6 to insert 5 left end screw threads, cable 2 keeps away from 5 one end card of post and goes into in thread clamping groove 9 and wears out conduit 10.

Wherein, evenly be provided with a plurality of groups in the joint intubate 4 and the contact pin 11 of ware 1 electric connection, the plug post 5 left side is provided with the socket 12 with the joint intubate 4 grafting cooperation, the socket 12 left side evenly is seted up and is pegged graft the complex contact pin groove 13 with contact pin 11, be provided with the electric guide vane with cable 2 electric connection in the contact pin groove 13, when pegging graft the socket 12 of the left end of plug post 5 in the joint intubate 4, realize the grafting cooperation of contact pin 11 and contact pin groove 13, and then realize the electric connection of ware 1 and cable 2.

Wherein, the lateral wall of the right part circumference of the inserted column 5 is provided with a first thread part 14 which is in thread fit with the thread bush 7, so that the threaded connection between the inserted column 5 and the sealing sleeve 6 is realized.

Wherein, seal cover 6 right side is provided with the communicating wire draw-in groove 15 with screw thread draw-in groove 9, is convenient for go into screw thread draw-in groove 9 with cable 2 from the rightmost end card of screw thread draw-in groove 9.

And a second threaded part 16 is arranged at the protruding part between two adjacent threaded clamping grooves 9.

The inner side wall of the circumference of the wire fixing sleeve 8 is provided with a circular concave thread 17, the circular concave thread 17 is in threaded fit with a part of the cable 2 protruding thread clamping groove 9, a thread groove 18 in threaded fit with the second thread part 16 is arranged between every two adjacent circular concave threads 17, the concave thread 17 is in threaded fit with the part of the cable 2 protruding thread clamping groove 9, the cable 2 is conveniently clamped into the thread clamping groove 9, and the threaded connection of the wire fixing sleeve 8 and the circular concave thread 17 is achieved through threaded fit of the second thread part 16 and the thread groove 18.

When the cable 2 is connected to the connector body 1, the plug column 5 is plugged in the connector insertion tube 4, then the sealing sleeve 6 is rotated, so that the sealing sleeve 6 is in threaded connection with the threaded tube 3, the interior of the sealing sleeve 6 is in a relatively sealed environment, moisture in the air can be blocked, moisture corrosion between the plug column 5 and the connector insertion tube 4 is effectively reduced, normal work of the flow sensor is guaranteed, and the service life of the ultrasonic flow sensor is prolonged; and then the wire fixing sleeve 8 is rotated towards the direction close to the body 1 according to the using length of the cable 2, so that the part of the cable 2 which is not needed is clamped into the thread clamping groove 9, the part of the cable 2 is wound on the circumferential side wall of the sealing sleeve 6, the situation that the overlong cable 2 is messy on the outer side of the body 1 is avoided, and the probability of damage to the cable 2 is reduced.

The device simple structure, high durability and convenient operation, screw-thread fit through seal cover 6 and screwed pipe 3, make insert post 5 and joint intubate 4 in the environment sealed relatively, and then reduce the moisture and corrode, flow sensor's normal work has been guaranteed, and improve supersound flow sensor's life, simultaneously through rotatory solidus cover 8, go into 2 cards of overlength in the screw thread draw-in groove 9, then can be according to 2 connection length of cable, adjust the live length of cable 2, avoid 2 mixed and disorderly in the external 1 outsides of ware of overlength cable.

In practical application, although the above structure can achieve better moisture-proof effect, in special environment and high precision, the joint is still damaged by moisture, and the applicant finds that the joint can contain external damp air when being installed between the sealing sleeve 6 and the plug post 5, and the space can also contain external damp air as time goes on, and the inside of the space is not ideal due to the threaded connection between the threaded sleeve 7 and the plug post 5 and the sealing effect between the sealing sleeve and the threaded pipe 3, so that the inside can be leaked after being used for a long time, and particularly, if the gap between the contact pin 11 and the contact pin groove 13 is exposed to damp air, the corrosion of the gap is obvious, therefore, the applicant further improves that the inner wall of the threaded sleeve 7 is provided with a threaded part and a smooth part, and a sealing block 28 is integrally arranged between one side end part of the smooth part close to the threaded pipe 3 and the plug post 5, the sealing sleeve 6 comprises a horizontal part and a vertical part, a thread clamping groove 9 is arranged on the horizontal part, the horizontal part is connected with a thread sleeve 7 through the vertical part, one side of the vertical part, which is close to the threaded pipe 3, is connected with a sealing spring 19, one side of the sealing spring 19, which is far away from the vertical part, is connected with a sealing baffle 20, the upper end and the lower end of the sealing baffle 20 are respectively in sealing sliding connection with the inner wall of the horizontal part and the outer wall of the thread sleeve 7, a through groove 21 is arranged inside the thread sleeve 7, a rotary valve 22 capable of rotating is arranged on the outer end side of the thread sleeve 7, which is far away from the threaded pipe 3, a net groove is arranged on the inner wall of the smooth part, a first drying agent 23 is accommodated in the net groove, a containing groove 24 is fixedly connected with the inner wall of the threaded pipe 3, a second drying agent 25 is contained in the containing groove 24, and the end part, which is close to the sealing baffle 20, is an elastic sealing structure, for example, the upper and lower elastic plates are overlapped at the middle position, under the pushing of the second drying agent 25, the second drying agent can extrude the upper and lower elastic plates and the overlapped position thereof, so as to extrude from the accommodating groove 24, one end of the accommodating groove 24 far away from the sealing baffle plate 20 is provided with a sealing push plate 26, the lower side wall of the end of the accommodating groove 24 far away from the sealing baffle plate 20 is provided with a one-way valve 27, and the lower side wall of the accommodating groove 24 is provided with a limiting plate between the sealing push plate 26 and the one-way valve 27. In use, the same parts as those of the previous embodiment will not be described in detail, except that after the cable 2 is inserted, the rotary valve 22 is rotated to a position not corresponding to the sealing through slot 21, then the gland 6 is rotated, the vertical part of the gland 6 drives the sealing baffle 20 to gradually approach the threaded pipe 3 through the sealing spring 19, the gland 6 is continuously rotated, after the sealing baffle 20 contacts the threaded pipe 3, the sealing baffle 20 will start to gradually compress the sealing spring 19 along with continuous rotation due to the blocking of the threaded pipe 3, the sealing baffle 20 shields the elastic side wall of the accommodating slot 24 to prevent the second desiccant from being thrown out due to vibration and the like, and due to the continuous extrusion process, the space between the gland 6 and the plug column 5 is gradually extruded through the sealing baffle 20, the moist air inside is discharged through the through slot 21, and after the sealing spring 19 is extruded, the turning force at this moment obviously starts to increase gradually, which means that the threaded bush 7 starts to enter the hollow space between the threaded pipe 3 and the socket 4, at this moment the rotary valve 22 is turned to the through slot 21, the through slot 21 is sealed by the rotary valve 22 so that the air inside will no longer be discharged, and, as the rotation continues, the pressure increases due to the decrease of the inner space, so that the check valve 27 is pushed by the pressure, so that the air gradually enters into the receiving groove 24, and the sealing push plate 26 is further pushed, the pushing of the sealing push plate 26 extrudes the plurality of second desiccant particles 25 out of the elastic end side of the receiving groove, the extruded second desiccant can push the sealing baffle 20, so that the second desiccant particles are caught between the sealing barrier 20 and the receiving groove 24, preventing shaking, while keeping the space continuously dry, while drying out the blow-by gases produced by the threaded connection between the threaded pipe 3 and the gland 6; on the other hand, as the threaded sleeve 7 is continuously rotated and advanced, the smooth part of the threaded sleeve 7 and the first drying agent 23 on the smooth part are gradually close to the gap between the pin 11 and the pin groove 13, and external moisture is prevented from entering the gap through the sealing block 28, and meanwhile, air leakage and/or liquid leakage generated by the threaded connection between the threaded sleeve 7 and the plug post 5 are dried through the first drying agent 23. Through the scheme, the moisture space in the sealing sleeve 6 can be reduced to the maximum degree, meanwhile, the sealing space between the pin 11 and the pin groove 13 is sealed, and the first desiccant and the second desiccant are matched to prevent the influence of moisture to the maximum degree. Specifically, the seal assembly method includes: step S1: providing a cable assembly for an ultrasonic flow sensor, plugging a plug post 5 on a connector insertion tube 4; step S2: rotating the rotary valve 22 to a position where the through groove 21 is not sealed, so that the through groove 21 can communicate with the outside; step S3: the sealing sleeve 6 is rotated, so that the sealing sleeve 6 is in threaded connection with the threaded pipe 3; step S4: when the operator feels that the rotating force of the sealing sleeve 6 obviously begins to increase gradually, the sealing sleeve 6 stops rotating; step S5: rotating the rotary valve 22 to the through groove 21, and sealing the through groove 21 through the rotary valve 22; step S6: the gland 6 is rotated again, and when the operator feels that the rotating force of the gland 6 obviously starts to increase gradually, the gland 6 is stopped rotating, and the sealing assembly of the cable is completed.

The above examples are only intended to illustrate the technical solution of the present invention, but not to limit it; although the present invention has been described in detail with reference to the foregoing embodiments, it will be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the corresponding technical solutions.

Claims

1. A cable seal assembly method for an ultrasonic flow sensor, comprising the steps of:

step S1: providing a cable assembly component for an ultrasonic flow sensor, and plugging a plug post (5) on a connector insertion tube (4);

step S2: rotating the rotary valve (22) to a position where the through groove (21) is not sealed, so that the through groove (21) can be communicated with the outside;

step S3: the sealing sleeve (6) is rotated, so that the sealing sleeve (6) is in threaded connection with the threaded pipe (3);

step S4: when an operator feels that the rotating force of the sealing sleeve (6) obviously begins to increase gradually, the sealing sleeve (6) stops rotating;

step S5: rotating the rotary valve (22) to the through groove (21), and sealing the through groove (21) through the rotary valve (22);

step S6: the sealing sleeve (6) is rotated again, when an operator feels that the rotating force of the sealing sleeve (6) obviously begins to increase gradually, the sealing sleeve (6) is stopped rotating, and the sealing assembly of the cable is completed;

the assembling method is applied to a cable assembling component of an ultrasonic flow sensor, and the cable assembling component comprises a body (1) and a cable (2), and is characterized in that: the device is characterized in that a threaded pipe (3) and a joint insertion pipe (4) are respectively arranged on the right side wall of the device body (1), the joint insertion pipe (4) is located at the axis of the threaded pipe (3), an insertion column (5) which is in insertion fit with the joint insertion pipe (4) is arranged at one end of a cable (2), a sealing sleeve assembly is in threaded connection with the outer side of the insertion column (5), the sealing sleeve assembly comprises a sealing sleeve (6) in threaded connection with the threaded pipe (3), a threaded sleeve (7) which is arranged on the right side of the sealing sleeve (6) and in threaded connection with the insertion column (5), and a wire fixing sleeve (8) which is in threaded connection with the outer side of the circumference of the sealing sleeve (6), a threaded clamping groove (9) is arranged on the outer side of the circumference of the sealing sleeve (6), a wire guide (10) is arranged on the circumferential side wall of the wire fixing sleeve (8), the left end thread of the insertion column (5) penetrates through the threaded sleeve (7) and penetrates into the sealing sleeve (6), one end of the cable (2) far away from the insertion column (5) is clamped into the threaded clamping groove (9) and penetrates through the wire guide (10), a plurality of groups of contact pins (11) electrically connected with the connector body (1) are uniformly arranged in the connector insertion tube (4), a socket (12) in plug-in fit with the connector insertion tube (4) is arranged on the left side of the contact pin (5), a contact pin groove (13) in plug-in fit with the contact pins (11) is uniformly formed in the left side of the socket (12), an electric guide sheet electrically connected with the cable (2) is arranged in the contact pin groove (13), the inner wall of the thread sleeve (7) is provided with a thread part and a smooth part, a sealing block (28) is integrally arranged between the end part of one side, close to the thread pipe (3), of the smooth part and the contact pin (5), the sealing sleeve (6) comprises a horizontal part and a vertical part, a thread clamping groove (9) is formed in the horizontal part, the horizontal part is connected with the thread sleeve (7) through the vertical part, and a sealing spring (19) is connected to one side, close to the thread pipe (3), of the vertical part, one side of the sealing spring (19) far away from the vertical part is connected with a sealing baffle plate (20), the upper end and the lower end of the sealing baffle plate (20) are respectively connected with the inner wall of the horizontal part and the outer wall of the threaded sleeve (7) in a sealing manner, a through groove (21) is arranged inside the threaded sleeve (7), a rotary valve (22) capable of rotating is arranged on the outer end side of the threaded sleeve (7) far away from the threaded pipe (3), a net groove is arranged on the inner wall of the smooth part, a first drying agent (23) is contained in the net groove, a containing groove (24) is fixedly connected with the inner wall of the threaded pipe (3), a second drying agent (25) is contained in the containing groove (24), a sealing push plate (26) is arranged at one end of the sealing baffle plate (20) far away from the containing groove (24), a one-way valve (27) is arranged on the lower side wall of one end of the sealing baffle plate (20) far away from the sealing baffle plate in the containing groove (24), and a limiting plate is arranged on the lower side wall of the accommodating groove (24) and between the sealing push plate (26) and the one-way valve (27).

2. The method for the sealed assembly of a cable for an ultrasonic flow sensor according to claim 1, characterized in that the right circumferential side wall of the insert post (5) is provided with a first threaded portion (14) which is in threaded engagement with the threaded sleeve (7).

3. The method for the sealed assembly of the cable for the ultrasonic flow sensor according to claim 1, characterized in that a lead wire clamping groove (15) communicated with the thread clamping groove (9) is arranged at the right side of the sealing sleeve (6).

4. The cable seal assembly method for the ultrasonic flow sensor according to claim 1, wherein a second threaded portion (16) is arranged at a projection between two adjacent threaded clamping grooves (9).

5. The cable seal assembly method for the ultrasonic flow sensor is characterized in that the inner side wall of the circumference of the wire fixing sleeve (8) is provided with a circular concave thread (17), the circular concave thread (17) is in threaded fit with a part of the cable (2) protruding out of the thread clamping groove (9), and a thread groove (18) in threaded fit with the second thread part (16) is arranged between every two adjacent circular concave threads (17).