Beam pipe structure and channel structure of ultrasonic water meter with valve control function and assembly method

Abstract

The invention relates to a beam pipe structure, a channel structure and an assembling method of an ultrasonic water meter with a valve control function. The beam pipe structure comprises a first beam pipe, a second beam pipe and a valve ball, the first beam tube and the second beam tube are clamped in a matched manner; the valve ball is arranged in the joint of the first beam pipe and the second beam pipe, a first guide notch is formed in the outer side of the first beam pipe, and a first reflecting plate is assembled in the first guide notch; a second guide notch is formed in the outer side of the second beam tube, and a second reflecting plate is assembled in the second guide notch; the device is simple in structure and ingenious in design, the two ends of the first beam pipe and the second beam pipe are the same in structure and can be used for a water inlet and a water outlet, and algorithm consistency processing of forward flow and reverse flow is facilitated.

Description

Technical Field

[0001] The invention belongs to the technical field of ultrasonic water meter accessories, and in particular relates to a beam tube structure, a channel structure and an assembly method of an ultrasonic water meter with a valve control function. Background Art

[0002] Most of the existing ultrasonic water meters with valve control function have the transducer placed at the rear end of the valve. The length of the water meter structure is relatively long, and it is difficult to design a compact appearance. The cost of the structure is high. When the valve is placed at the rear end, the channel structure at both ends of the beam tube is different, which is not conducive to the ultrasonic water meter to measure the reverse flow. At present, the country pays more attention to the leakage problem of the pipe network. Most small-diameter ultrasonic water meters do not have pressure sensors and cannot monitor whether there is leakage in the pipeline between the large-diameter water meter and the household meter. During the use of ultrasonic water meters, bubbles will inevitably be generated in the channel, and bubbles have a great impact on ultrasonic measurement, which is difficult to avoid.

[0003] In view of the above problems, it is necessary to improve them. Summary of the invention

[0004] The object of the present invention is to provide a beam tube structure, a channel structure and an assembly method of an ultrasonic water meter with a valve control function which has a simple structure, an ingenious design and avoids the influence of bubbles gathered on the top on ultrasonic measurement.

[0005] In order to achieve the above purpose, the technical solution adopted by the patent of the present invention is: a beam tube structure of an ultrasonic water meter with a valve control function, comprising a first beam tube, a second beam tube and a valve ball; the first beam tube and the second beam tube are adapted and clamped; the valve ball is built into the connection between the first beam tube and the second beam tube, a first guide groove is formed on the outer side of the first beam tube, and a first reflective plate is installed in the first guide groove; a second guide groove is formed on the outer side of the second beam tube, and a second reflective plate is installed in the second guide groove.

[0006] As a preferred solution of the present invention, the first reflective plate includes a first plate body and a first reflective sheet; the first reflective sheet is obliquely arranged on the first plate body, and the second reflective plate includes a second plate body and a second reflective sheet; the second reflective sheet is obliquely arranged on the second plate body.

[0007] As a preferred solution of the present invention, the angle between the first reflector and the inner wall of the first plate is 30° to 60°; the angle between the second reflector and the inner wall of the second plate is 30° to 60°; the first reflector and the second reflector are symmetrically arranged.

[0008] As a preferred solution of the present invention, a first sealing ring and a first gasket are installed in the first beam tube; a second sealing ring and a second gasket are installed in the second beam tube; the first sealing ring and the second sealing ring are symmetrically arranged, and the first gasket and the second gasket are symmetrically arranged.

[0009] As a preferred solution of the present invention, a positioning groove opening toward the second flow tube is formed on the first flow tube; an embedding notch is provided on the upper end of the valve ball, and the embedding notch faces the positioning groove of the first flow tube.

[0010] As a preferred solution of the present invention, a plurality of guide rods are formed at the end of the first beam tube, and correspondingly, a plurality of guide grooves adapted to the guide rods are formed on the second beam tube; the first beam tube is connected to the second beam tube, and the guide rods are assembled in the guide grooves.

[0011] As a preferred solution of the present invention, a locking block is formed at the end of the guide rod, and a locking groove is formed in the guide groove; the locking block is built into the locking groove to fasten the first beam tube and the second beam tube.

[0012] A channel structure of an ultrasonic water meter with a valve control function comprises: a tube body, a water flow channel is formed in the tube; a beam tube structure is installed in the water flow channel, two ultrasonic connecting tubes are installed on the tube body, and the ultrasonic connecting tubes are connected to the water flow channel; a transducer is installed on the ultrasonic connecting tube; the two transducers respectively match a first reflector and a second reflector, a valve connecting tube corresponding to a positioning groove is installed on the tube body, the valve connecting tube is located between the two ultrasonic connecting tubes, and a valve stem and a limit nut are installed on the valve connecting tube; and along the length direction of the tube body, the valve stem is vertically upward, and the direction of the transducer is rotated 45 degrees outward with the tube body axis as the rotation axis.

[0013] As a preferred solution of the present invention, the tube body is equipped with a temperature sensor and a pressure sensor; a pressure plate is installed on the temperature sensor, pressure sensor and transducer, and the pressure plate is fastened to the tube body by screws; the inner hole of the ultrasonic connecting tube is a stepped hole, the transducer is inserted into the stepped hole, and is sealed by an O-ring.

[0014] A method for assembling a channel structure of an ultrasonic water meter with a valve control function comprises the following steps: Step 1: assemble the first sealing ring and the first gasket in the first beam tube in sequence; Step 2: assemble the valve ball into the first flow tube so that the embedding notch of the valve ball corresponds to the position of the positioning groove of the first flow tube; Step 3, assembling the second sealing ring and the second gasket in the second beam tube in sequence; Step 4: Connect the first beam tube and the second beam tube to each other and lock them. Step 5: assembling the first reflector and the second reflector at both ends of the first beam tube and the second beam tube respectively, so as to complete the assembly of the entire beam tube structure; Step 6: Assemble the beam tube structure in step 5 to the middle of the tube body so that the positioning groove corresponds to the position of the valve connecting tube on the tube body; and the two ultrasonic connecting tubes correspond to the positions of the first reflector and the second reflector; Step 7: assemble the temperature sensor, pressure sensor and transducer on the pipe body; and install a pressure plate on the temperature sensor, pressure sensor and transducer, and fasten them to the pipe body by screws; Step eight, transfer the valve stem and the limit nut to the valve connecting pipe in sequence; wherein the end of the valve stem passes through the valve connecting pipe and the positioning groove, and is embedded in the embedding notch to control the rotation of the valve ball.

[0015] The beneficial effects of the present invention are: 1. The present invention provides a beam tube structure of an ultrasonic water meter with a valve control function, comprising a first beam tube and a second beam tube that can be detachably assembled, with a simple structure and ingenious design. The first beam tube and the second beam tube have the same structure at both ends, and both ends can be used for water inlet and water outlet, which is beneficial to algorithm consistency processing of forward and reverse flow rates.

[0016] 2. The present invention provides a first guide slot and a second guide slot, realizing detachable connection between the first reflector plate and the second reflector plate, realizing connection between the first beam tube and the second beam tube through the guide rod and the guide slot, realizing locking and positioning of the first beam tube and the second beam tube through the coordinated connection between the locking block and the locking slot, thereby improving the integrity and compactness of the overall structure.

[0017] 3. The present invention provides a channel structure of an ultrasonic water meter with a valve control function, in which the valve stem is placed between two transducers, the pressure sensor is placed on the side of the beam tube, and the temperature sensor is used instead of the limit column; the manufacturing is simple and the production efficiency is high; it is conducive to monitoring the leakage of the pipe network.

[0018] 4. The valve connecting tube provided by the present invention is located between two ultrasonic connecting tubes, and along the length direction of the tube body, the angle formed between the valve connecting tube and the ultrasonic connecting tube is 45°, which is beneficial to prevent the accumulation of bubbles from affecting the metering.

[0019] 5. The present invention provides an assembly method for the channel structure of an ultrasonic water meter with a valve control function, which can reduce the size of the appearance parts of the valve-controlled ultrasonic water meter, and the appearance parts of the ultrasonic water meter with valve and the ultrasonic water meter without valve can be universal, which greatly improves the versatility of the structural parts, reduces the manufacturing cost of parts, and reduces the inventory quantity and the difficulty of warehouse management. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1It is a structural exploded diagram of the channel structure of the ultrasonic water meter according to an embodiment of the present invention; Figure 2 This is a structural exploded view of the first beam tube according to an embodiment of the present invention; Figure 3 This is a structural exploded view of the second beam tube according to an embodiment of the present invention; Figure 4 It is a connection schematic diagram of the beam tube structure according to an embodiment of the present invention; Figure 5 A schematic diagram of a channel structure of an ultrasonic water meter according to an embodiment of the present invention; Figure 6 is a cross-sectional view of a channel structure of an ultrasonic water meter according to an embodiment of the present invention; Explanation of the accompanying drawings: first reflecting plate 1, first plate body 1-1, first reflecting sheet 1-2, first flow tube 2, guide rod 2-1, locking block 2-2, positioning groove 2-3, first sealing ring 3, valve ball 4, embedding groove 4-1, second flow tube 5, guide groove 5-1, locking groove 5-2, tube body 6, water flow channel 6-1, limit nut 7, valve stem 8, first gasket 9, temperature sensor 10, transducer 11, pressure plate 12, pressure sensor 13, ultrasonic connecting tube 14, O-ring 15, valve connecting tube 16, second sealing ring 17, second gasket 18, first guide groove 20, flow tube structure 30, second guide groove 50, second reflecting plate 51, second plate body 51-1, second reflecting sheet 51-2. DETAILED DESCRIPTION

[0021] The technical solution of the present invention will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of them. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0022] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, and it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0023] Example: like Figure 1As shown, a beam tube structure of an ultrasonic water meter with a valve control function comprises a first beam tube 2, a second beam tube 5 and a valve ball 4; the first beam tube 2 and the second beam tube 5 are adapted and clamped; the valve ball 4 is built into the connection between the first beam tube 2 and the second beam tube 5, a first guide slot 20 is formed on the outer side of the first beam tube 2, and a first reflector 1 is installed in the first guide slot 20; a second guide slot 50 is formed on the outer side of the second beam tube 5, and a second reflector 51 is installed in the second guide slot 50; the first reflector 1 and the second reflector 51 are symmetrically arranged relative to the center of the beam tube structure; the present invention provides a beam tube structure of an ultrasonic water meter with a valve control function, comprising two detachably assembled first beam tubes and second beam tubes, with a simple structure and ingenious design, the first beam tube and the second beam tube have the same structure at both ends, and both ends can be used for water inlet and water outlet, which is beneficial to the algorithm consistency processing of forward and reverse flow.

[0024] For details, please refer to the attached Figure 2 , Figure 3 and Figure 6 As shown, the first reflective plate 1 includes a first plate body 1-1 and a first reflective sheet 1-2; the first reflective sheet 1-2 is arranged obliquely on the first plate body 1-1, and the second reflective plate 51 includes a second plate body 51-1 and a second reflective sheet 51-2; the second reflective sheet 51-2 is arranged obliquely on the second plate body 51-1.

[0025] The included angle between the first reflector 1-2 and the inner wall of the first plate 1-1 is 30° to 60°; the included angle between the second reflector 51-2 and the inner wall of the second plate 51-1 is 30° to 60°; in this embodiment, the included angle between the first reflector 1-2 and the inner wall of the first plate 1-1 is 45°; the included angle between the second reflector 51-2 and the inner wall of the second plate 51-1 is 45°; the first reflector 1-2 and the second reflector 51-2 are symmetrically arranged; specifically, the first reflector 1-2, the second reflector 51-2 and the two transducers 11 are used in combination to enhance the stability of the measurement and improve the measurement accuracy.

[0026] See attached Figure 2-Figure 3 As shown, the first flow tube 2 is equipped with a first sealing ring 3 and a first gasket 9; the second flow tube 5 is equipped with a second sealing ring 17 and a second gasket 18; the first sealing ring 3 and the second sealing ring 17 are symmetrically arranged, and the first gasket 9 and the second gasket 18 are symmetrically arranged; specifically, the first sealing ring 3 and the second sealing ring 17, the first gasket 9 and the second gasket 18 are symmetrically assembled at both ends of the valve ball 4.

[0027] Specifically, the first gasket 9 and the second gasket 18 are both polytetrafluoroethylene gaskets, which increase the tightness of the overall structure. The use of polytetrafluoroethylene gaskets increases the tightness of the overall structure on the one hand, and increases the slidability of the valve ball 4 on the other hand.

[0028] See attached Figure 1-Figure 2 As shown, a positioning groove 2-3 with an opening toward the second flow tube 5 is formed on the first flow tube 2; an embedding groove 4-1 is provided at the upper end of the valve ball 4, and the embedding groove 4-1 is directly opposite to the positioning groove 2-3 of the first flow tube 2; wherein, the setting of the embedding groove 4-1 facilitates the embedding of the valve stem 8 and improves the sliding operability of the valve ball 40.

[0029] See attached Figure 2-Figure 3 As shown; a plurality of guide rods 2-1 are formed at the end of the first beam tube 2, and correspondingly, a plurality of guide grooves 5-1 adapted to the guide rods 2-1 are formed on the second beam tube 5; the first beam tube 2 is connected to the second beam tube 5, and the guide rods 2-1 are assembled in the guide grooves 5-1; through the mutual cooperation between the guide rods 2-1 and the guide grooves 5-1, the detachable connection between the first beam tube 2 and the second beam tube 5 is realized.

[0030] In addition, a locking block 2-2 is formed at the end of the guide rod 2-1, and a locking groove 5-2 is formed in the guide groove 5-1; the locking block 2-2 is built into the locking groove 5-2, and is used to fasten the first beam tube 2 and the second beam tube 5; through the mutual cooperation of the locking block 2-2 and the locking groove 5-2, the first beam tube 2 and the second beam tube 5 are assembled and locked, thereby improving the overall structural strength and firmness.

[0031] See attached Figure 1 and Figure 5 As shown; a channel structure of an ultrasonic water meter with a valve control function, comprising: a tube body 6, a water flow channel 6-1 is formed in the tube body 6; a beam tube structure 30 is installed in the water flow channel 6-1, two ultrasonic connecting tubes 14 are installed on the tube body 6, and the ultrasonic connecting tube 14 is connected to the water flow channel 6-1; a transducer 11 is installed on the ultrasonic connecting tube 14; the two transducers 11 match the first reflector 1-2 and the second reflector 51-2 respectively, and a valve connecting tube 16 corresponding to the positioning groove 2-3 is installed on the tube body 6, the valve connecting tube 16 is located between the two ultrasonic connecting tubes 14, and a valve stem 8 and a limit nut 7 are installed on the valve connecting tube 16; and along the length direction of the tube body 6, the valve stem 8 is vertically upward, and the direction of the transducer 11 is rotated 45° outward with the tube body axis as the rotation axis; specifically, the transducer 11 is installed by rotating a certain angle, which is conducive to avoiding the influence of bubbles gathered on the top on ultrasonic measurement.

[0032] The valve connecting pipe 16 is equipped with a valve stem 8 and a limit nut 7; the present invention provides a channel structure of an ultrasonic water meter with a valve control function, the valve stem 8 is placed in the middle of two transducers, the pressure sensor is placed on the side of the beam tube, and the temperature sensor is used instead of the limit column; the manufacturing is simple and the production efficiency is high; it is conducive to monitoring the leakage of the pipe network.

[0033] Specifically, the tube body 6 is equipped with a temperature sensor 10 and a pressure sensor 13; a pressure plate 12 is installed on the temperature sensor 10, the pressure sensor 13 and the transducer 11, and the pressure plate 12 is fastened to the tube body 6 by screws; the firmness of the entire channel structure is improved, thereby ensuring safe use.

[0034] The inner hole of the ultrasonic connecting tube 14 is a stepped hole, and the transducer 11 is inserted into the stepped hole so that the transducer 11 is positioned and sealed by the O-ring 15 to achieve sealed installation.

[0035] A method for assembling a channel structure of an ultrasonic water meter with a valve control function comprises the following steps: Step 1: assemble the first sealing ring 3 and the first gasket 9 in the first beam tube 2 in sequence; Step 2: assemble the valve ball 4 into the first flow tube 2 so that the embedding notch 4 - 1 of the valve ball 4 corresponds to the positioning groove 2 - 3 of the first flow tube 2; Step 3, assemble the second sealing ring 17 and the second gasket 18 in the second beam tube 5 in sequence; Step 4: Connect the first beam tube 2 and the second beam tube 5 to each other and lock them. Step 5: assemble the first reflector 1 and the second reflector 51 at both ends of the first beam tube 2 and the second beam tube 5, respectively, to complete the assembly of the entire beam tube structure 30; Step 6: Assemble the beam tube structure 30 in step 5 to the middle of the tube body 6, so that the positioning groove 2-3 corresponds to the position of the valve connecting tube 16 on the tube body 6; the two ultrasonic connecting tubes 14 correspond to the positions of the first reflector 1-2 and the second reflector 51-2; Step 7: assemble the temperature sensor 10, the pressure sensor 13 and the transducer 11 on the tube body 6; and install a pressing plate 12 on the temperature sensor 10, the pressure sensor 13 and the transducer 11, and fasten them to the tube body 6 by screws; Step eight, transfer the valve stem 8 and the limit nut 7 to the valve connecting pipe 16 in sequence; wherein the end of the valve stem 8 passes through the valve connecting pipe 16 and the positioning groove 2-3, and is embedded in the embedding groove 4-1 to control the rotation of the valve ball 4.

[0036] The present invention provides an assembling method of a channel structure of an ultrasonic water meter with a valve control function, which can reduce the size of the appearance parts of the valve-controlled ultrasonic water meter, and the appearance parts of the ultrasonic water meter with a valve and the ultrasonic water meter without a valve can be universal, which greatly improves the versatility of the structural parts, reduces the manufacturing cost of parts, and reduces the inventory quantity and the difficulty of warehouse management.

[0037] The above description of the disclosed embodiments enables one skilled in the art to implement or use the present invention. Various modifications to these embodiments will be apparent to one skilled in the art, and the general principles defined herein may be implemented in other embodiments without departing from the spirit or scope of the present invention; therefore, the present invention will not be limited to the embodiments shown herein, but rather to the widest scope consistent with the principles and novel features disclosed herein.

[0038] Although this article uses more of the figure markings: first reflector 1, first plate body 1-1, first reflector sheet 1-2, first flow tube 2, guide rod 2-1, locking block 2-2, positioning groove 2-3, first sealing ring 3, valve ball 4, embedded groove 4-1, second flow tube 5, guide groove 5-1, locking groove 5-2, tube body 6, water flow channel 6-1, limit nut 7, valve stem 8, first gasket 9, temperature sensor 10, transducer 11, pressure plate 12, pressure sensor 13, ultrasonic connecting tube 14, O-ring 15, valve connecting tube 16, second sealing ring 17, second gasket 18, first guide groove 20, flow tube structure 30, second guide groove 50, second reflector 51, second plate body 51-1, second reflector sheet 51-2 and other terms, the possibility of using other terms is not excluded. These terms are used only to more conveniently describe and explain the essence of the present invention; any additional limitations interpreted as them are contrary to the spirit of the present invention.

Claims

1. A beam tube structure of an ultrasonic water meter with valve control function, characterized in that: The invention comprises a first beam tube (2), a second beam tube (5) and a valve ball (4); the first beam tube (2) and the second beam tube (5) are adapted to be clamped together; the valve ball (4) is built into the connection between the first beam tube (2) and the second beam tube (5); a first guide slot (20) is formed on the outer side of the first beam tube (2), and a first reflection plate (1) is mounted in the first guide slot (20); a second guide slot (50) is formed on the outer side of the second beam tube (5), and a second reflection plate (51) is mounted in the second guide slot (50).

2. The beam tube structure of an ultrasonic water meter with valve control function according to claim 1, characterized in that: The first reflective plate (1) comprises a first plate body (1-1) and a first reflective sheet (1-2); the first reflective sheet (1-2) is arranged obliquely on the first plate body (1-1); the second reflective plate (51) comprises a second plate body (51-1) and a second reflective sheet (51-2); the second reflective sheet (51-2) is arranged obliquely on the second plate body (51-1).

3. The beam tube structure of an ultrasonic water meter with valve control function according to claim 2, characterized in that: The included angle between the first reflection sheet (1-2) and the inner wall of the first plate body (1-1) is 30° to 60°; the included angle between the second reflection sheet (51-2) and the inner wall of the second plate body (51-1) is 30° to 60°; the first reflection sheet (1-2) and the second reflection sheet (51-2) are symmetrically arranged.

4. The beam tube structure of an ultrasonic water meter with valve control function according to claim 1, characterized in that: The first beam tube (2) is equipped with a first sealing ring (3) and a first gasket (9); the second beam tube (5) is equipped with a second sealing ring (17) and a second gasket (18); the first sealing ring (3) and the second sealing ring (17) are symmetrically arranged, and the first gasket (9) and the second gasket (18) are symmetrically arranged.

5. The beam tube structure of an ultrasonic water meter with valve control function according to claim 1, characterized in that: The first beam tube (2) is formed with a positioning groove (2-3) opening toward the second beam tube (5); the upper end of the valve ball (4) is provided with an embedding groove (4-1), and the embedding groove (4-1) is directly opposite to the positioning groove (2-3) of the first beam tube (2).

6. The beam tube structure of an ultrasonic water meter with valve control function according to claim 1, characterized in that: A plurality of guide rods (2-1) are formed at the end of the first beam tube (2), and correspondingly, a plurality of guide grooves (5-1) adapted to the guide rods (2-1) are formed on the second beam tube (5); the first beam tube (2) is connected to the second beam tube (5), and the guide rods (2-1) are assembled in the guide grooves (5-1).

7. The beam tube structure of an ultrasonic water meter with valve control function according to claim 6, characterized in that: A locking block (2-2) is formed at the end of the guide rod (2-1), and a locking groove (5-2) is formed in the guide groove (5-1); the locking block (2-2) is built into the locking groove (5-2) and is used to fasten the first beam tube (2) and the second beam tube (5).

8. A channel structure of an ultrasonic water meter with valve control function, characterized in that: The beam tube structure according to any one of claims 1 to 7 comprises: a tube body (6), a water flow channel (6-1) is formed in the tube body (6); a beam tube structure (30) is installed in the water flow channel (6-1), two ultrasonic connecting tubes (14) are installed on the tube body (6), and the ultrasonic connecting tubes (14) are connected to the water flow channel (6-1); a transducer (11) is installed on the ultrasonic connecting tube (14); the two transducers (11) respectively match the first reflector (1-2) and the second reflector (51-2), a valve connecting tube (16) corresponding to the positioning groove (2-3) is installed on the tube body (6), the valve connecting tube (16) is located between the two ultrasonic connecting tubes (14), and a valve stem (8) and a limit nut (7) are installed on the valve connecting tube (16); and along the length direction of the tube body (6), the direction of the valve stem (8) is vertically upward, and the direction of the transducer (11) is rotated 45 degrees outward with the tube body axis as the rotation axis.

9. The channel structure of an ultrasonic water meter with valve control function according to claim 8, characterized in that: The tube body (6) is equipped with a temperature sensor (10) and a pressure sensor (13); a pressure plate (12) is installed on the temperature sensor (10), the pressure sensor (13) and the transducer (11), and the pressure plate (12) is fastened to the tube body (6) by means of screws; the inner hole of the ultrasonic connecting tube (14) is a stepped hole, and the transducer (11) is inserted into the stepped hole and sealed by means of an O-ring (15).

10. A method for assembling a channel structure of an ultrasonic water meter with a valve control function, characterized in that: The channel structure according to any one of claims 8 to 9 comprises the following steps: Step (1), assembling the first sealing ring (3) and the first gasket (9) in sequence in the first beam tube (2); Step (ii), assembling the valve ball (4) in the first flow tube (2) so that the embedding notch (4-1) of the valve ball (4) corresponds to the position of the positioning groove (2-3) of the first flow tube (2); Step (iii), assembling the second sealing ring (17) and the second gasket (18) in sequence into the second beam tube (5); Step (iv), the first beam tube (2) and the second beam tube (5) are mutually clamped and locked. Step (five), assembling the first reflection plate (1) and the second reflection plate (51) at both ends of the first beam tube (2) and the second beam tube (5), respectively, to complete the assembly of the entire beam tube structure (30); Step (six), assembling the beam tube structure (30) in step (fifth) to the middle of the tube body (6), so that the positioning groove (2-3) corresponds to the position of the valve connecting tube (16) on the tube body (6); and the two ultrasonic connecting tubes (14) correspond to the positions of the first reflecting sheet (1-2) and the second reflecting sheet (51-2); Step (seven), assembling the temperature sensor (10), the pressure sensor (13) and the transducer (11) on the tube body (6); and installing a pressure plate (12) on the temperature sensor (10), the pressure sensor (13) and the transducer (11), and fastening the pressure plate (12) to the tube body (6) by means of screws; Step (eight), the valve stem (8) and the limit nut (7) are sequentially transferred to the valve connecting pipe (16); wherein the end of the valve stem (8) passes through the valve connecting pipe (16) and the positioning groove (2-3), and is embedded in the embedding groove (4-1) to control the rotation of the valve ball (4).

Images