Pipe section of ultrasonic meter

Abstract

The utility model provides a pipe section of an ultrasonic meter, and belongs to the technical field of machinery. The problem of high production cost is solved. The pipe comprises a tubular body, the body comprises an outer pipe body which is a plastic piece and a tubular inner core which is a metal piece, the inner core is arranged in the outer pipe body, the outer wall of the inner core is fixedly connected with the inner wall of the outer pipe body, two bosses are arranged on the same side of the outer pipe body in a protruding mode, and the two bosses are distributed in the axial direction of the outer pipe body. Through holes are formed in the positions, corresponding to the two bosses, of the side portion of the inner core, each boss is provided with an installation hole located above the corresponding through hole and communicated with the corresponding through hole and connecting holes distributed in the two sides of the installation hole and parallel to the installation hole, a metal insert is fixedly connected into the connecting hole of each boss, and each metal insert is provided with an inner threaded hole. The utility model has the advantages of low production cost, good structural strength, good durability and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of machinery and relates to a pipe section of an ultrasonic meter. Background Art

[0002] In the water supply and heating pipeline, it is necessary to install a meter to measure the flow of water or the heat of heating, so as to facilitate the water supply company or heating company to settle the fees with the user. Traditional meters are mechanical, but with the continuous advancement of technology, ultrasonic meters have appeared on the market, which are more accurate and more stable than traditional mechanical meters.

[0003] Existing ultrasonic meters all include a pipe section, a measuring component and a display device. The measuring component is positioned in the pipe section. The measuring component has two oppositely arranged reflectors. Ultrasonic transducers corresponding to the two reflectors are fixed on the pipe section. The display device is fixed outside the pipe section and the two ultrasonic transducers are electrically connected to the display device. For example, an ultrasonic water meter disclosed in patent application No. 201621134074.5. At present, the common pipe sections on the market are copper parts. During production, the blanks are forged or cast first and then machined to obtain the finished products. They are widely used because of their durable structure and easy production. However, in practice, the price of copper materials is rising, resulting in the production cost of pipe sections becoming increasingly higher. Utility Model Content

[0004] The purpose of the utility model is to solve the above problems existing in the prior art, propose a pipe section of an ultrasonic meter, and solve the problem of high production cost.

[0005] The purpose of the utility model can be achieved through the following technical solutions:

[0006] The pipe section of the ultrasonic meter includes a tubular body, characterized in that the body includes an outer tube body which is a plastic part and an inner core which is a tubular metal part, the inner core is arranged in the outer tube body, the outer wall of the inner core is fixedly connected to the inner wall of the outer tube body, two bosses are protruding from the same side of the outer tube body, the two bosses are distributed along the axial direction of the outer tube body, and the side of the inner core corresponding to the position of the two bosses are respectively provided with through holes, each boss has a mounting hole located above the corresponding through hole and connected thereto, and connecting holes distributed on both sides of the mounting hole and parallel to the mounting hole, and a metal insert is fixedly connected to the connecting hole of each boss, and each metal insert has an internal threaded hole.

[0007] During production, the inner core and each metal insert are processed separately, and then the inner core and each metal insert are placed in a mold, and then molten plastic is injected into the mold. The molten plastic will eventually be formed into an outer tube body and directly connected with the inner core and each metal insert, thereby obtaining a complete body, wherein the mounting hole is used for mounting and fixing the ultrasonic transducer, and the internal threaded hole of each metal insert is used for mounting and fixing the display device on the body. The outer tube body of the plastic part can greatly reduce the production cost, and the existence of the inner core of the metal part can increase the structural strength of the outer tube body. For example, when the two ends of the outer tube body are threadedly connected, the inner core can well support the outer tube body so that it does not deform, ensuring that the pipe section has reliable durability. In addition, the use of the internal threaded hole of the metal insert to realize the installation and fixation of the display device can ensure that the outer tube body will not deform when the display device is installed and fixed (if the internal threaded hole is directly formed on the outer tube body, it is easy to cause the outer tube body to break at this point during the threaded connection).

[0008] In the pipe section of the ultrasonic meter described above, the inner core side has a plurality of limiting holes, and the inner wall of the outer tube body has a plurality of limiting heads corresponding to the limiting holes, and the limiting heads are respectively located in the limiting holes.

[0009] A number of limiting holes are processed on the side of the inner core, so that when the outer tube body is injection molded, limiting heads located in the limiting holes will be naturally formed on the inner wall of the outer tube body. The cooperation between the limiting heads and the limiting holes can improve the connection firmness between the outer tube body and the inner core both in the axial direction and in the circumferential direction, thereby reducing production costs and ensuring durability during long-term use.

[0010] In the pipe section of the ultrasonic meter, the outer side of the inner core has an outer spline, and the inner wall of the outer tube has an inner spline matching the outer spline.

[0011] After the outer tube body is injection molded, internal splines matching the external splines on the outer side of the inner core will be naturally formed on the inner wall of the outer tube body. With such matching, the connection firmness between the inner core and the outer tube body in the circumferential direction can be further improved.

[0012] In the pipe section of the ultrasonic meter described above, the two ends of the outer tube body are respectively provided with annular convex shoulders, and the inner core abuts between the two convex shoulders.

[0013] During injection molding, annular bosses are directly formed in the two ports of the outer tube body. After injection molding, the inner core directly rests between the two bosses, so that the two bosses can be used to form a more secure limit for the inner core along the axial direction, thereby reducing production costs and further improving the connection firmness between the outer tube body and the inner core.

[0014] In the pipe section of the ultrasonic meter, the outer side of the metal insert has an external spline, and the hole wall of the connecting hole has an internal spline matching the external spline.

[0015] After the outer tube body is injection molded, an internal spline that matches the external spline on the outside of the metal insert will naturally be formed on the wall of the connecting hole. With such a match, the circumferential connection strength between the metal insert and the connecting hole can be improved, avoiding slippage between the metal insert and the connecting hole along the circumferential direction after long-term use.

[0016] In the pipe section of the ultrasonic meter, the outer side of the metal insert has an annular groove in the middle along the center line of the connecting hole, and the hole wall of the connecting hole has an annular convex portion located in the annular groove.

[0017] When the outer tube body is injection molded, the molten plastic will form an annular convex portion that matches the annular groove. The cooperation between the annular convex portion and the annular groove can improve the connection firmness between the metal insert and the boss along the center line of the connecting hole, thereby preventing the metal insert from falling out of the connecting hole after long-term use.

[0018] Compared with the prior art, the pipe section of the ultrasonic meter is configured with a main body including an outer pipe body of a plastic part and an inner core of a metal part. The outer pipe body is integrally formed outside the inner core by injection molding. The outer pipe body of the plastic part can greatly reduce the production cost, and the presence of the inner core of the metal part can increase the structural strength of the outer pipe body. For example, when the two ends of the outer pipe body are threadedly connected, the inner core can well support the outer pipe body so that it does not deform, thereby ensuring that the pipe section has reliable durability.

[0019] In addition, the internal threaded hole of the metal insert is used to install and fix the display device, which can ensure that the outer tube body will not be deformed when the display device is installed and fixed. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 It is a three-dimensional schematic diagram of the pipe section of the ultrasonic meter.

[0021] Figure 2 It is a three-dimensional schematic diagram of the pipe section of the ultrasonic meter from another angle.

[0022] Figure 3 It is a plan view of the pipe section of this ultrasonic meter.

[0023] Figure 4 yes Figure 3 Sectional view along AA direction.

[0024] Figure 5 yes Figure 3 Cross-sectional view along the BB axis.

[0025] Figure 6yes Figure 3 Sectional view along CC direction.

[0026] Figure 7 It is a three-dimensional schematic diagram of the inner core.

[0027] Figure 8 This is the cross-sectional view after the measuring assembly is installed in this pipe section (the cross-sectional view direction is the same as that of the Figure 4 same).

[0028] In the figure, 1, main body; 2, outer tube body; 2a, boss; 2a1, mounting hole; 2a2, connecting hole; 2a3, annular convex part; 2b, limit head; 2c, shoulder; 2d, block part; 2e, boss; 2e1, assembly hole; 2f, first clearance hole; 3, inner core; 3a, through hole; 3b, limit hole; 3c, second clearance hole; 4, metal insert; 4a, internal threaded hole; 4b, annular groove; 5, positioning pin; 6, measuring component; 6a, bracket. DETAILED DESCRIPTION

[0029] The following are specific embodiments of the present invention and the accompanying drawings to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

[0030] like Figure 1 , Figure 3 , Figure 4 , Figure 5 and Figure 7 As shown, the pipe section of the ultrasonic meter includes a tubular body 1, the body 1 includes an outer tube body 2 which is a plastic part and an inner core 3 which is a tubular metal part. The inner core 3 is made of stainless steel. The inner core 3 is arranged in the outer tube body 2. The outer wall of the inner core 3 is fixedly connected to the inner wall of the outer tube body 2. The outer sides of the two ends of the outer tube body 2 are respectively provided with external threads. Two bosses 2a are protruding from the same side of the outer tube body 2. The two bosses 2a are distributed along the axial direction of the outer tube body 2. The side of the inner core 3 is respectively provided with through holes 3a at positions corresponding to the two bosses 2a. Each boss 2a has a mounting hole 2a1 located above and connected to the corresponding through hole 3a and connecting holes 2a2 distributed on both sides of the mounting hole 2a1 and parallel to the mounting hole 2a1. A metal insert 4 is fixedly connected to the connecting hole 2a2 of each boss 2a. Each metal insert 4 has an internal threaded hole 4a. The mounting holes 2a1 are used to mount ultrasonic transducers, which are used in pairs. In actual use, ultrasonic transducers are installed in both mounting holes 2a1. The internal threaded holes 4a of each metal insert 4 are used to mount and fix the display device on the body 1. Specifically, after the two ultrasonic transducers are mounted and fixed in the two mounting holes 2a1, a pressing plate is set against the two bosses 2a, and then the display device is placed against the pressing plate. Then, the screws and the internal threaded holes 4a of each metal insert 4 are used to complete the mounting and fixing of the display device and the body 1.

[0031] During production, the inner core 3 and each metal insert 4 are processed separately, and then the inner core 3 and each metal insert 4 are placed in a mold, and then molten plastic is injected into the mold. The molten plastic will eventually be formed into an outer tube body 2 and directly fixed together with the inner core 3 and each metal insert 4, thereby obtaining a complete body 1. The outer tube body 2 of the plastic part can greatly reduce the production cost, and the existence of the inner core 3 of the metal part can increase the structural strength of the outer tube body 2. For example, when the two ends of the outer tube body 2 are threadedly connected, the inner core 3 can well support the outer tube body 2 so that it does not deform, ensuring that this pipe section has reliable durability. In practice, this pipe section can be applied to both ultrasonic water meters and ultrasonic heat meters.

[0032] Specifically, Figure 4 , Figure 5 , Figure 6 and Figure 7 As shown, the inner core 3 has a plurality of limiting holes 3b on the side, and the inner wall of the outer tube body 2 has a plurality of limiting heads 2b corresponding to the limiting holes 3b, and each limiting head 2b is located in each limiting hole 3b. First, a plurality of limiting holes 3b are processed on the side of the inner core 3, so that when the outer tube body 2 is injection molded, the limiting heads 2b located in each limiting hole 3b will be naturally formed on the inner wall of the outer tube body 2. The cooperation between the limiting heads 2b and the limiting holes 3b can improve the connection firmness between the outer tube body 2 and the inner core 3 in both the axial direction and the circumferential direction, and ensure the durability in long-term use while reducing the production cost. The outer side of the inner core 3 has an external spline, and the inner wall of the outer tube body 2 has an internal spline that matches the external spline. After the outer tube body 2 is injection molded, the inner wall of the outer tube body 2 will naturally form an internal spline that matches the external spline on the outer side of the inner core 3. With the help of such cooperation, the connection firmness between the inner core 3 and the outer tube body 2 in the circumferential direction can be further improved. In this embodiment, the two ports of the outer tube body 2 are respectively provided with annular convex shoulders 2c, and the inner core 3 abuts between the two convex shoulders 2c. The outer tube body 2 directly forms annular convex shoulders 2c in the two ports during injection molding, and the inner core 3 directly abuts between the two convex shoulders 2c after injection molding, so that the two convex shoulders 2c can be used to form a more secure limit for the inner core 3 along the axial direction, thereby further improving the connection firmness between the outer tube body 2 and the inner core 3 while reducing the production cost.

[0033] Furthermore, if Figure 5As shown, the metal insert 4 has an external spline on the outside, and the hole wall of the connecting hole 2a2 has an internal spline that matches the external spline. After the outer tube body 2 is injection molded, the hole wall of the connecting hole 2a2 will naturally form an internal spline that matches the external spline on the outside of the metal insert 4. With such a match, the circumferential connection firmness between the metal insert 4 and the connecting hole 2a2 can be improved, avoiding slippage between the metal insert 4 and the connecting hole 2a2 along the circumferential direction after long-term use. The outer side of the metal insert 4 has an annular groove 4b in the middle along the center line direction of the connecting hole 2a2, and the hole wall of the connecting hole 2a2 has an annular convex portion 2a3 located in the annular groove 4b. When the outer tube body 2 is injection molded, the molten plastic will form an annular convex portion 2a3 that matches it in the annular groove 4b. With the help of the cooperation between the annular convex portion 2a3 and the annular groove 4b, the connection firmness between the metal insert 4 and the boss 2a along the center line direction of the connecting hole 2a2 can be improved, thereby preventing the metal insert 4 from falling out of the connecting hole 2a2 after long-term use.

[0034] like Figure 1-Figure 4 As shown, at least two block parts 2d are protruding from the same side of the outer tube body 2. The block parts 2d and the boss 2a are arranged opposite to each other on the outer tube body 2. In actual use, the boss 2a is facing upward, so the two block parts 2d are arranged downward. The arrangement of the block parts 2d can make the pipe section be placed stably on a plane. The outer tube body 2 is also provided with a protruding column 2e on the side where the boss 2a is located. The protruding column 2e is located between the two bosses 2a. The protruding column 2e has an assembly hole 2e1 with an internal thread. The side wall of the outer tube body 2 is provided with a clearance hole 2f that is concentrically arranged and connected with the assembly hole 2e1, and the side of the inner core 3 is correspondingly provided with a clearance hole 2c. In actual use, the measuring component 6 is placed in the inner core 3, and the positioning pin 5 is connected to the assembly hole 2e1 of the boss 2e by thread. One end of the positioning pin 5 passes through the first clearance hole 2f and the second clearance hole 3c in sequence and is inserted into a hole in the bracket 6a of the measuring component 6 to form a positioning. The state of the measuring component 6 after being installed in the present pipe section is as follows: Figure 8 shown.

[0035] The specific embodiments described herein are merely examples of the spirit of the present invention. Those skilled in the art may make various modifications or additions to the specific embodiments described or replace them in similar ways, but they will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A pipe section of an ultrasonic meter, comprising a tubular body (1), characterized in that: The body (1) comprises an outer tube body (2) which is a plastic part and an inner core (3) which is a tubular metal part. The inner core (3) is arranged in the outer tube body (2). The outer wall of the inner core (3) is fixedly connected to the inner wall of the outer tube body (2). Two bosses (2a) are protruding from the same side of the outer tube body (2). The two bosses (2a) are distributed along the axial direction of the outer tube body (2). The side of the inner core (3) corresponding to the positions of the two bosses (2a) are respectively provided with through holes (3a). Each boss (2a) has a mounting hole (2a1) located above the corresponding through hole (3a) and connected thereto, and connecting holes (2a2) distributed on both sides of the mounting hole (2a1) and parallel to the mounting hole (2a1). A metal insert (4) is fixedly connected to the connecting hole (2a2) of each boss (2a). Each metal insert (4) has an internal threaded hole (4a).

2. The pipe section of the ultrasonic meter according to claim 1, characterized in that: The inner core (3) has a plurality of limiting holes (3b) on its side, and the inner wall of the outer tube (2) has a plurality of limiting heads (2b) corresponding to the limiting holes (3b), and the limiting heads (2b) are respectively located in the limiting holes (3b).

3. The pipe section of the ultrasonic meter according to claim 1, characterized in that: The outer side of the inner core (3) is provided with an external spline, and the inner wall of the outer tube body (2) is provided with an internal spline matching the external spline.

4. The pipe section of the ultrasonic meter according to claim 1, 2 or 3, characterized in that: The two ends of the outer tube body (2) are respectively provided with annular convex shoulders (2c), and the inner core (3) is pressed between the two convex shoulders (2c).

5. The pipe section of the ultrasonic meter according to claim 1, characterized in that: The outer side of the metal insert (4) has an external spline, and the hole wall of the connecting hole (2a2) has an internal spline that matches the external spline.

6. The pipe section of the ultrasonic meter according to claim 5, characterized in that: The outer side of the metal insert (4) has an annular groove (4b) in the middle along the center line direction of the connecting hole (2a2), and the hole wall of the connecting hole (2a2) has an annular protrusion (2a3) located in the annular groove (4b).

Images