Ultrasonic transducer mounting structure for water meter

Abstract

An ultrasonic transducer mounting structure for a water meter belongs to the technical field of flow measurement. The energy converter comprises an installation cavity, an energy converter, an end cover, an energy converter sealing ring and an end cover sealing ring, an energy converter limiting step and an end cover limiting step are arranged on the inner side wall of the installation cavity, the energy converter sealing ring is arranged between the energy converter and the energy converter limiting step, and the end cover sealing ring is arranged between the end cover and the end cover limiting step. The end cover is in threaded connection with the inner side wall of the installation cavity, a pressing ring is arranged between the end cover and the transducer, a threading opening is formed in the side face of the pressing ring, and the end cover presses the transducer on the transducer limiting step through the pressing ring. According to the utility model, the assembly operation can be effectively simplified and the assembly efficiency is improved.

Description

Technical Field

[0001] This utility model relates to the field of flow measurement and testing technology, and in particular to an installation structure for an ultrasonic transducer for a water meter. Background Technology

[0002] The main function of an ultrasonic transducer is to measure the velocity and flow rate of water by emitting and receiving ultrasonic waves. Sealing is the most basic requirement for its installation. In the prior art, such as the prior art with authorization announcement number CN 208171353 U, a rotating positioning structure for a large-diameter ultrasonic transducer mounting base is disclosed. This structure includes a pipe section, a clamping ring, a positioning cover, a mounting base, and a positioning tube. The positioning tube is vertically mounted on the pipe section. The clamping ring is threadedly connected to the positioning tube to fix the mounting base in the positioning tube. The mounting base is installed in the positioning tube to install and fix the transducer. The positioning cover includes a circular cover body with a downwardly protruding third cylinder on its lower side. The third cylinder has a rectangular groove. A positioning protrusion is formed on the lower side of the cover body. The upper end face of the mounting base protrudes upward to form a rectangular rib that matches the rectangular groove. A positioning recess is formed on the upper end face of the positioning tube that matches the positioning protrusion.

[0003] However, the installation structure of the ultrasonic transducer described above still suffers from problems such as cumbersome assembly and low efficiency. Utility Model Content

[0004] The purpose of this invention is to solve the problems existing in the prior art and provide an installation structure for an ultrasonic transducer for water meters, which can effectively simplify the assembly operation and improve the assembly efficiency.

[0005] The objective of this utility model is achieved through the following technical solution:

[0006] An ultrasonic transducer mounting structure for a water meter includes a mounting cavity, a transducer, an end cap, a transducer sealing ring, and an end cap sealing ring. The inner wall of the mounting cavity is provided with a transducer limiting step and an end cap limiting step. The transducer sealing ring is located between the transducer and the transducer limiting step, and the end cap sealing ring is located between the end cap and the end cap limiting step. The end cap is threaded to the inner wall of the mounting cavity. A clamping ring is provided between the end cap and the transducer. The clamping ring has a wire through-hole on its side. The end cap presses the transducer onto the transducer limiting step through the clamping ring.

[0007] Preferably, the clamping ring has a threading port on both opposite sides, and an anti-rotation pin is provided between two adjacent mounting cavities, with both ends of the anti-rotation pin extending into the threading port of the clamping ring in the two adjacent mounting cavities.

[0008] Preferably, a wire hole is provided between two adjacent mounting cavities.

[0009] Preferably, the anti-rotation pin has an axial through hole and is disposed in the thread hole.

[0010] Preferably, the anti-rotation pin is threadedly connected to the thread hole.

[0011] Preferably, the anti-rotation pin includes an insertion portion and a limiting portion, wherein the diameter of the limiting portion is larger than the diameter of the insertion portion.

[0012] Preferably, the clamping ring is slidably connected to the inner wall of the mounting cavity.

[0013] Preferably, the threading port is connected to one end of the clamping ring that runs axially upwards.

[0014] Preferably, the threading port is connected to the end of the clamping ring near the end cap.

[0015] Preferably, the end cap is provided with a positioning groove in the circumferential direction, and the end cap sealing ring is disposed in the positioning groove.

[0016] The advantages of this utility model are:

[0017] 1. By simply tightening the end cap with a screw, not only is a seal achieved between the end cap and the mounting cavity, but the displacement during the screw tightening process is also transferred to the transducer using the clamping ring, thereby causing the transducer to press against the transducer sealing ring and achieving a seal between the transducer and the mounting cavity.

[0018] 2. The anti-rotation pin and the limiting fit of the wire threading port prevent damage to the transducer wires when the clamping ring rotates;

[0019] 3. By placing the anti-rotation pin inside the through hole and using the axial through hole of the anti-rotation pin for threading, the structure is simplified and production efficiency is improved. Attached Figure Description

[0020] Figure 1 A cross-sectional view of an ultrasonic transducer mounting structure for a water meter provided as an embodiment of this specification;

[0021] Figure 2 This is a schematic diagram of the structure of an ultrasonic water meter provided in the embodiments of this specification;

[0022] Figure 3 This is a schematic diagram of the clamping ring provided in the embodiments of this specification;

[0023] Figure 4 This is a schematic diagram of the anti-rotation pin provided in the embodiments of this specification;

[0024] In the diagram: 1-Installation cavity; 2-Transducer; 3-End cap; 31-Positioning groove; 4-Transducer sealing ring; 5-End cap sealing ring; 6-Pressure ring; 61-Wire hole; 7-Wire; 8-Tube body; 9-Wire tube; 10-Meter head; 11-Anti-rotation pin; 111-Through hole; 112-Insert part; 113-Limiting part; 12-Wire hole; 13-Outlet hole. Detailed Implementation

[0025] The present invention will now be described in further detail with reference to the accompanying drawings and specific embodiments.

[0026] As mentioned in the background section, the installation structure of the ultrasonic transducer requires two screw-tightening operations to achieve two seals: one is the screw-tightening operation on the clamping ring to securely install and seal the transducer; the other is the screw-tightening operation on the positioning cover to install and seal the positioning cover. Therefore, the assembly steps are relatively cumbersome, and the overall assembly efficiency is low.

[0027] Therefore, such as Figure 1 and 2 As shown, this embodiment provides an ultrasonic transducer mounting structure for water meters, including a mounting cavity 1, a transducer 2, an end cap 3, a transducer sealing ring 4, an end cap sealing ring 5, and a clamping ring 6. In a conventional configuration, the inner wall of the mounting cavity 1 has a transducer limiting step and an end cap limiting step. The transducer sealing ring 4 is located between the transducer 2 and the transducer limiting step, and the end cap sealing ring 5 is located between the end cap 3 and the end cap limiting step. The end cap 3 is threadedly connected to the inner wall of the mounting cavity 1. However, unlike existing technologies, in this embodiment, the clamping ring 6 does not need to be threadedly connected to the inner wall of the mounting cavity. Instead, it is directly placed between the transducer 2 and the end cap 3. The displacement generated during the screw tightening of the end cap 3 pushes the clamping ring 6 to press against the transducer 2, thereby pressing the transducer 2 against the transducer limiting step, achieving a seal at the transducer sealing ring 4. The end cap 3 itself is fastened to the mounting cavity via a threaded connection, achieving a seal at the end cap sealing ring 5. In other words, this embodiment only uses a single screw tightening operation to meet the sealing requirements at both locations. Of course, in the prior art, space needs to be left between the clamping ring 6 and the end cap 3 for wire threading. However, in this embodiment, both ends of the clamping ring 6 need to contact the end cap 3 and the transducer 2 respectively. Therefore, in order to lead out the wire 7, a wire threading port 61 is provided on the side of the clamping ring 6.

[0028] like Figure 2As shown, ultrasonic water meters typically have two sets of transducers on opposite sides of the pipe body 8. Each set of transducers includes two transducers arranged vertically adjacent to each other. The wires 7 of the two adjacent transducers are connected to the meter head 10 through a single upper wire conduit 9. Therefore, the upper side of the upper mounting cavity has an outlet hole 13 connecting to the wire conduit 9, and a through hole 12 is provided between the upper and lower mounting cavities to allow the wire of the lower transducer to pass through the upper mounting cavity and enter the wire conduit 9. Therefore, as... Figure 3 As shown, both sides of the clamping ring 6 opposite to each other are provided with wire-passing openings 61 to allow the wires of the lower transducer to pass through the upper mounting cavity. In order to increase the size of the wire-passing openings 61 and reduce the difficulty of wire passing, the wire-passing openings 61 can be made to be connected to one end of the clamping ring 6 in the axial direction. However, in order to ensure the balance of pressure of the clamping ring 6 on various parts of the transducer 2, the wire-passing openings 61 are specifically connected to one end of the clamping ring 6 near the end cap 3. In this way, the end of the clamping ring 6 that abuts against the transducer 2 has a complete annular structure.

[0029] Since there is no threaded connection between the clamping ring 6 and the mounting cavity, during the screw tightening process of the end cap 3, the rotation of the end cap 3 will cause the clamping ring 6 to rotate through friction. Since the position of the wire 7 is fixed, the rotation of the clamping ring will subject the wire 7 to shear force, which can easily damage the wire. Therefore, anti-rotation pins 11 are provided on the sidewalls between two adjacent mounting cavities. The two ends of the anti-rotation pins 11 extend into the wire-passing holes 61 of the clamping rings 6 in the two adjacent mounting cavities, thereby limiting the rotation angle of the upper and lower clamping rings 6. Correspondingly, the wire-passing holes 12 on the mounting cavity need to be in the same axial direction as the anti-rotation pins 11.

[0030] To further simplify the structure, the anti-rotation pin 11 and the wire hole 12 are integrated together, that is, the anti-rotation pin 11 is inserted into the wire hole 12, and in order to meet the wire threading requirements, such as Figure 4 As shown, an axial through hole 111 is provided in the anti-rotation pin 11 for threading. To ensure the stability of the connection between the anti-rotation pin 11 and the threading hole 12, a threaded connection between the anti-rotation pin and the threading hole 12 can be designed. To ensure the accuracy of the connection position between the anti-rotation pin 11 and the threading hole 12, and to ensure that both ends of the anti-rotation pin can stably play a limiting role, the anti-rotation pin 11 includes an insertion part 112 and a limiting part 113. The diameter of the limiting part 113 is larger than the diameter of the insertion part 112, that is, the diameter of the limiting part 113 is larger than the diameter of the threading hole 12. When the limiting part 113 abuts against the inner wall of the mounting cavity, the accurate installation of the anti-rotation pin is completed.

[0031] In addition, to ensure the stability of the clamping ring's position within the mounting cavity and to prevent radial movement, the clamping ring 6 is slidably connected to the inner wall of the mounting cavity, i.e., the two are in clearance fit.

[0032] To ensure the sealing performance of the end cap sealing ring 5, the end cap 3 is provided with a positioning groove 31 in the circumferential direction, and the end cap sealing ring 5 is located in the positioning groove 31.

[0033] The above are merely preferred embodiments of this utility model, and are implementations based on the overall concept of this utility model. Furthermore, the scope of protection of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the scope of protection of this utility model. Therefore, the scope of protection of this utility model should be determined by the scope of the claims.

Claims

1. An ultrasonic transducer mounting structure for a water meter, comprising a mounting cavity, a transducer, an end cap, a transducer sealing ring, and an end cap sealing ring, wherein the inner wall of the mounting cavity is provided with a transducer limiting step and an end cap limiting step, the transducer sealing ring is disposed between the transducer and the transducer limiting step, the end cap sealing ring is disposed between the end cap and the end cap limiting step, and the end cap is threadedly connected to the inner wall of the mounting cavity, characterized in that... A clamping ring is provided between the end cap and the transducer. The clamping ring has a wire pass-through hole on its side. The end cap presses the transducer onto the transducer limiting step through the clamping ring.

2. The installation structure for an ultrasonic transducer for a water meter according to claim 1, characterized in that, The clamping ring has a threading port on both opposite sides, and a non-rotating pin is provided between two adjacent mounting cavities. The two ends of the non-rotating pin extend into the threading port of the clamping ring in the two adjacent mounting cavities.

3. The installation structure for an ultrasonic transducer for a water meter according to claim 2, characterized in that, A wire-passing hole is provided between two adjacent mounting cavities.

4. The installation structure for an ultrasonic transducer for a water meter according to claim 3, characterized in that, The anti-rotation pin has an axial through hole and is located inside the thread hole.

5. The installation structure for an ultrasonic transducer for a water meter according to claim 4, characterized in that, The anti-rotation pin is threadedly connected to the thread hole.

6. The installation structure for an ultrasonic transducer for a water meter according to claim 2, characterized in that, The anti-rotation pin includes an insertion part and a limiting part, wherein the diameter of the limiting part is larger than the diameter of the insertion part.

7. The installation structure for an ultrasonic transducer for a water meter according to claim 1, characterized in that, The clamping ring is slidably connected to the inner wall of the mounting cavity.

8. The installation structure for an ultrasonic transducer for a water meter according to claim 1, characterized in that, The threading port is connected to one end of the clamping ring that is axially upward.

9. The installation structure for an ultrasonic transducer for a water meter according to claim 8, characterized in that, The threading opening is connected to the end of the clamping ring near the end cap.

10. The installation structure for an ultrasonic transducer for a water meter according to claim 1, characterized in that, The end cap is provided with a positioning groove in the circumference, and the end cap sealing ring is disposed in the positioning groove.

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