Ultrasonic insert matching structure and pipe fitting

Abstract

The utility model discloses an ultrasonic insert matching structure and a pipe fitting, and relates to the technical field of ultrasonic water meters, the ultrasonic insert matching structure comprises an insert, the insert is provided with sawteeth along the inserting direction, the end part of the insert is provided with a limiting surface, and the insert is matched with a pipeline in an inserting manner; the inner wall of the pipeline is provided with tooth grooves matched with the sawteeth in a limiting mode and limiting steps connected with the limiting faces in an abutting mode, and the limiting direction of the matching structure of the sawteeth and the tooth grooves is opposite to the limiting direction of the matching structure of the limiting faces and the limiting steps. The pipe fitting comprises the ultrasonic insertion piece matching structure. According to the ultrasonic insertion piece matching structure, the insertion piece is kept free of displacement during long-time work, and the transmission stability of ultrasonic signals and the accuracy of water flow testing are improved. The pipe fitting is compact in structure, the internal insertion piece is more stable, and the transmission stability of ultrasonic signals and the accuracy of water flow testing are improved during long-time work.

Description

Technical Field

[0001] The utility model relates to the technical field of ultrasonic water meters, and particularly relates to an ultrasonic insert fitting structure and a pipe fitting. Background Art

[0002] An ultrasonic water meter is a new type of water meter that analyzes and processes the time difference generated when the ultrasonic beam changes in velocity during the forward and reverse flow in water to obtain the water flow velocity and further calculate the water flow rate. When installing an ultrasonic water meter, special pipe fittings are required for connection, and pipe fittings are a general term for components in a pipeline system that play roles such as connection, control, direction change, flow diversion, sealing, and support. Currently, most ultrasonic water meter inserts adopt an integrally stamped and formed structure insert. This structure is compact, easy to install, and can ensure the effective transmission of ultrasonic signals in the pipe section. Currently, the insert is installed by press-fitting with an interference fit. Some inserts have an interference fit on a single plane. In the short term, it does not affect the transmission and reflection of ultrasonic signals in the ultrasonic water meter. However, due to the influence of the long-term working process and environmental factors, the impact of the forward-flowing water during the working process will cause the insert to move slightly, thereby affecting the transmission and reflection of ultrasonic signals and resulting in a decrease in the accuracy of water flow measurement.

[0003] For example, the utility model patent with the publication number CN219035920U discloses a detachable ultrasonic water meter insert-type pipe fitting, which relates to the technical field of ultrasonic water meter pipe fittings. To solve the problem that the insert-type reflector used inside the existing connecting pipe fitting is not firmly installed when being replaced or fixed. The inner tank is installed inside the ultrasonic water meter connecting pipe fitting. Installation grooves are provided on both sides inside the two ends of the inner tank, and the installation grooves are integrally formed with the inner tank. Upper and lower moving shielding blocks are provided on the upper sides of the outer walls at both ends of the inner tank. Summary of the Utility Model

[0004] Technical Problems to be Solved by the Utility Model

[0005] Aiming at the technical problem that in the existing ultrasonic water meter, due to the influence of the long-term working process and environmental factors, the insert structure moves slightly, thereby affecting the transmission and reflection of ultrasonic signals and resulting in a decrease in the accuracy of water flow measurement, the utility model provides an ultrasonic insert fitting structure and a pipe fitting, which can keep the insert without displacement during long-term work, improving the transmission stability of ultrasonic signals and the accuracy of water flow measurement.

[0006] The utility model also provides a pipe fitting, which has a compact structure, and the internal insert is more stable, improving the transmission stability of ultrasonic signals and the accuracy of water flow measurement during long-term work.

[0007] Technical Solutions

[0008] To solve the above problems, the technical solution provided by the present utility model is as follows:

[0009] An ultrasonic insert fitting structure includes an insert. The insert is provided with serrations at its position along the insertion direction, a limiting surface at its end, and is inserted and fitted with a pipe. The pipe is provided with a tooth groove for limiting and fitting with the serrations and a limiting step for abutting against the limiting surface. The limiting direction of the fitting structure between the serrations and the tooth groove is opposite to the limiting direction of the fitting structure between the limiting surface and the limiting step.

[0010] The serration design of the insert can provide limitation along the insertion direction of the insert (the axial direction of the pipe), ensuring stable axial limitation of the insert. The serrated insertion type installation of the insert can also ensure the consistency and stability of the insert position under long-term water flow impact, without affecting the accuracy of ultrasonic wave propagation and reflection, improving the transmission stability of ultrasonic signals and the accuracy of water flow measurement. Moreover, the serration structure combined with the limiting structure of the limiting surface and the limiting step enables the insert to be limited in both forward and reverse axial directions after being inserted into the pipe, and it is always reliably installed during long-term operation and under forward water flow impact. Facing forward impact, the rear angle of the serration structure and the limiting surface at the end can firmly hold against the pipe; facing reverse water flow impact, the serration structure is buckled into the tooth groove, and the positive angle can stably and firmly hold against the pipe. This insert installation structure is compact, the installation method is simple, it can ensure that the insert has no displacement for a long time, and it can ensure the stable transmission of ultrasonic signals in a short pipe and the stability of the product.

[0011] Optionally, the insert includes an opening and a reflector. The reflector is arranged in the opening and is fixedly connected to the opening through a connecting rod.

[0012] The opening is used for water flow passage, the reflector is used for reflecting ultrasonic waves, and the connecting rod can ensure that the reflector remains stable during use, avoiding position deviation caused by vibration or other external forces.

[0013] Optionally, the opening is in a water droplet shape, and the edge of the opening is provided with an inclined water guiding edge.

[0014] The water droplet-shaped opening is beneficial to the water guiding effect of the water flow, so as to reduce the obstruction to the internal water flow of the pipe and reduce the pressure loss. Thereby ensuring the uniformity of the internal flow passage of the pipe, which is beneficial to ensuring high-precision ultrasonic wave transmission and reflection. The water guiding edge guides the water flow. Compared with shapes such as rectangles that will have a frontal impact on the water flow, the water droplet shape and the water guiding edge can avoid frontal impact, reduce impact wear and instability caused by the impact on the insert.

[0015] Optionally, the reflector is inclined at an angle to the insert.

[0016] By tilting the reflector relative to the insert by a certain angle, the reflection direction of the ultrasonic signal can be precisely controlled, which is very important for ultrasonic sensors. When choosing the tilting angle, factors such as the propagation characteristics of the ultrasonic signal and the position of the detection target need to be considered to ensure that the signal can be effectively reflected and received.

[0017] Optionally, the reflector and the insert are of an integrally formed structure, and the connecting rod is of a twist-forming structure.

[0018] The integrally formed structure can effectively prevent the problem of structural fracture, and the integrally formed design ensures that there are no additional connection points between the reflector and the insert, reducing potential failure points and improving the reliability and durability of the entire structure. The connecting rod is formed by twisting, which can not only provide sufficient support force to maintain the position of the reflector, but also increase the mechanical strength of the entire structure.

[0019] Optionally, the saw teeth are positive rake angle teeth, and the rake face of the positive rake angle teeth faces away from the limiting surface.

[0020] The limiting directions of the saw tooth structure and the limiting surface can form opposite stable limitations, so that the insert will not move in either the forward or reverse direction, which is beneficial to improving stability.

[0021] A pipe fitting, according to the ultrasonic insert fitting structure described above, includes the ultrasonic insert fitting structure.

[0022] The pipe fitting includes the ultrasonic insert fitting structure, which has the advantages of a compact structure, no displacement of the insert during long-term operation, improved transmission stability of ultrasonic signals, and improved accuracy of water flow measurement.

[0023] Optionally, both ends of the pipe fitting are provided with the ultrasonic insert fitting structure and threaded connection ends, the ultrasonic water meter connection end is arranged at the position of the ultrasonic insert of the pipe fitting, and the pipe fitting is provided with a fixing part.

[0024] The ultrasonic insert fitting structure is used to ensure the stability of the insert, the threaded connection end is used to connect other pipe fittings, the ultrasonic water meter connection end is used to connect the ultrasonic water meter, and the fixing part provides structural support.

[0025] Beneficial Effects

[0026] Adopting the technical solution provided by the present utility model, compared with the prior art, it has the following beneficial effects:

[0027] In the technical solution provided by the present utility model, the serrated design of the insert can provide a limit along the insertion direction of the insert (the axial direction of the pipeline), ensuring the stable limit of the insert in the axial direction. The serrated insertion type installation of the insert can also ensure the consistency and stability of the insert position under the impact of water flow for a long time, without affecting the accuracy of ultrasonic wave propagation and reflection, improving the transmission stability of ultrasonic signals and the accuracy of water flow measurement. Moreover, the serrated structure combined with the limit structures of the limit surface and the limit step enables it to be limited in both positive and negative axial directions after being inserted into the pipeline, and it is always reliably installed during long-term operation and under the impact of positive-direction water flow. Facing the positive impact, the rear angle of the serrated structure and the limit surface at the end can firmly support against the pipeline; facing the reverse water flow impact, the serrated structure has an inverted tooth groove, and the positive angle can stably and firmly support against the pipeline. This insert installation structure is compact, the installation method is simple, it can ensure that the insert has no displacement for a long time, and it can ensure the stable transmission of ultrasonic signals in the short pipeline and the stability of the product. Description of the Drawings

[0028] Figure 1 It is a partial structural sectional view of an ultrasonic insert fitting structure proposed in an embodiment of the present utility model;

[0029] Figure 2 It is a structural schematic diagram of a first insert of an ultrasonic insert fitting structure proposed in an embodiment of the present utility model;

[0030] Figure 3 It is a structural sectional view of a pipe fitting proposed in an embodiment of the present utility model;

[0031] Figure 4 It is a structural schematic diagram of a pipe fitting proposed in an embodiment of the present utility model;

[0032] 1. Pipe fitting; 101. First limit step; 102. Second limit step; 103. Tooth groove; 104. Ultrasonic water meter connection end; 105. Fixed part; 2. First insert; 201. Serrations; 202. Opening; 203. Flow guiding edge; 204. Reflective sheet; 205. Connecting rod; 206. Limit surface; 3. Second insert; 4. Pipeline. Detailed Embodiment

[0033] To further understand the content of the present utility model, the present utility model will be described in detail in combination with the drawings and embodiments.

[0034] Embodiment

[0035] Combined with the attached Figure 1 、 2, An ultrasonic insert fitting structure, including an insert and a pipe 4, the ultrasonic insert fitting structure is symmetrically arranged at both ends of the pipe 4. The insert is divided into a first insert 2 and a second insert 3. The first insert 2 is arranged at the left end, and serrations 201 are provided at its position along the insertion direction, and a limiting surface 206 is provided at its end, and it is inserted and fitted with the pipe 4. The inner wall of the pipe 4 is provided with a tooth groove 103 that is limitedly fitted with the serrations 201 and a limiting step that abuts against the limiting surface 206. The limiting direction of the fitting structure between the serrations 201 and the tooth groove 103 is opposite to the limiting direction of the fitting structure between the limiting surface 206 and the limiting step. Specifically, the serrations 201 are provided on both sides of the first insert 2, and both sides of the first insert 2 are in interference fit with the inner wall of the pipe 4. After insertion, the serrations 201 and the tooth groove 103 are clamped and fixed. The fitting structure between the limiting surface 206 and the limiting step forms an abutting structure to hold the first insert 2. Both sides of the first insert 2 are in interference fit with the inner wall of the pipe 4, that is, the insert is slightly larger than the inner diameter of the pipe 4 to ensure a tight connection. The interference fit increases the friction between the insert and the pipe 4 and improves the stability of the connection.

[0036] The insert includes an opening 202 and a reflecting sheet 204. The reflecting sheet 204 is arranged in the opening 202, and the reflecting sheet 204 is fixedly connected to the opening 202 through a connecting rod 205. The reflecting sheet 204 is opposite to the pipe orifice of the ultrasonic water meter connection end 104, so that ultrasonic waves can be emitted to the orifice of the ultrasonic water meter connection end 104 and then transmitted to the ultrasonic water meter.

[0037] The opening 202 is in a water droplet shape, and the reflecting sheet 204 is located at the larger width of the water droplet shape, which can accommodate the reflecting sheet 204. The edge of the opening 202 is provided with an inclined guiding edge 203. The heads of the water droplet-shaped openings 202 of the first insert 2 and the second insert 3 face outwards, and the tails are opposite.

[0038] The reflecting sheet 204 is inclined at an angle of 45° with the insert.

[0039] The reflecting sheet 204 and the insert are of an integrally formed structure, and the connecting rod 205 is of a twist-forming structure. The insert is made of a metal material and can be deformed at normal temperature or after heating. By twisting the reflecting sheet 204 of the originally sheet-shaped integrally formed insert by a certain angle, it can be formed, and the processing and manufacturing are very efficient. The connection of the connecting rod 205 makes the twisting process easier and reduces the processing difficulty.

[0040] The serrations 201 are positive rake teeth, and the rake angle of the positive rake teeth faces away from the limiting surface 206. The positive rake teeth refer to the situation where the rake angle of the teeth (that is, the angle of the tooth tip relative to the tooth root) is a positive value. In the face of the impact of reverse water flow, the serration 201 structure is buckled into the tooth groove 103, and the positive angle can firmly hold the pipe 4.

[0041] Combined with the attached Figure 3, a pipe fitting 1, including an ultrasonic insert fitting structure. The second insert 3 is located at the right end of the pipe fitting 1, and its structure is the same as that of the first insert 2 and is mirror-symmetrical. In the middle is a pipe 4 for ultrasonic transmission. The pipe 4 is expanded in diameter at the position for accommodating the ultrasonic insert fitting structure, and the middle of the pipe 4 is reduced in diameter to facilitate the concentrated transmission of ultrasonic waves and reduce the loss of ultrasonic signals.

[0042] The limiting steps are divided into a first limiting step 101 and a second limiting step 102. The first limiting step 101 is located at the left end, and the second limiting step 102 is located at the right end.

[0043] Combined with the attached Figure 4 , ultrasonic insert fitting structures and threaded connection ends are provided at both ends of the pipe fitting 1. An ultrasonic water meter connection end 104 is provided at the position of the ultrasonic insert of the pipe fitting 1, and a fixing part 105 is provided on the pipe fitting 1. The threaded connection end is provided with an external thread, and the ultrasonic water meter connection end 104 and the fixing part 105 are provided with internal threads.

[0044] The above has schematically described the present invention and its implementation manners. This description is not restrictive. What is shown in the drawings is only one of the implementation manners of the present invention, and the actual structure is not limited thereto. Therefore, if those of ordinary skill in the art are inspired by it and design similar structural manners and embodiments without creative efforts without departing from the purpose of the present invention's creation, they shall fall within the protection scope of the present invention.

Claims

1. An ultrasonic insert matching structure, characterized in that: include The insert is provided with saw teeth along the insertion direction and a limit surface at the end thereof, which is inserted into the pipe for cooperation; The inner wall of the pipe is provided with a tooth groove matched with the sawtooth and a limiting step abutting against the limiting surface, and the limiting direction of the matching structure of the sawtooth and the tooth groove is opposite to the limiting direction of the matching structure of the limiting surface and the limiting step.

2. The ultrasonic insert matching structure according to claim 1, characterized in that: The inserting sheet comprises an opening and a reflecting sheet, wherein the reflecting sheet is arranged in the opening and is fixedly connected to the opening via a connecting rod.

3. The ultrasonic insert matching structure according to claim 2, characterized in that: The opening is in a water drop shape, and an inclined flow guide edge is provided at the edge of the opening.

4. The ultrasonic insert matching structure according to claim 2, characterized in that: The reflective sheet and the inserting sheet are inclined at an angle.

5. The ultrasonic insert matching structure according to claim 4, characterized in that: The reflective sheet and the inserting sheet are an integrally formed structure, and the connecting rod is a twisted and formed structure.

6. The ultrasonic insert matching structure according to claim 1, characterized in that: The saw teeth are positive rake angle teeth, and the rake angles of the positive rake angle teeth are facing away from the limiting surface.

7. A pipe fitting, according to the ultrasonic insert matching structure according to any one of claims 1 to 6, characterized in that: It includes the ultrasonic insert matching structure.

8. A pipe fitting according to claim 7, characterized in that: Both ends of the pipe fitting are provided with the ultrasonic insert fitting matching structure and the threaded connection end. The ultrasonic insert fitting position is matched with an ultrasonic water meter connection end. The pipe fitting is provided with a fixing portion.

Images