Base meter of ultrasonic heat meter

Abstract

The utility model provides a base meter of an ultrasonic heat meter, and belongs to the technical field of metering. The problem that the metering accuracy becomes poor after long-time use is solved. Two reflection columns are arranged in the body in the axial direction of the body, a flow stabilizing pipe is arranged between the two reflection columns in the body, the flow stabilizing pipe is a plastic piece, the other positions, relative to the flow stabilizing pipe, of the two ends of the flow stabilizing pipe are expanded outwards to form a horn mouth shape, and an annular protruding part is arranged on the outer side of the flow stabilizing pipe in the circumferential direction. The outer diameter of the annular protruding part is matched with the inner diameter of the body, an annular sealing groove is formed in the outer side of the annular protruding part, a sealing ring is arranged in the annular sealing groove and abuts against the inner wall of the body to form sealing, first notches communicated with an inner hole of the flow stabilizing pipe are formed in the bottoms of the two ends of the flow stabilizing pipe correspondingly, and the lower ends of the two reflection columns are located in the two first notches correspondingly. The inner wall of the first notch is a cambered surface, and the outer side wall of the reflection column is attached to the inner wall of the first notch. The device has the advantages of accurate metering, reliable structure and the like.

Description

Technical Field

[0001] The utility model belongs to the technical field of metrology and relates to a basic meter of an ultrasonic heat meter. Background Art

[0002] Traditional heat meters only have the function of metering and do not have the function of regulating the flow rate. Therefore, in order to regulate the flow rate after metering, a ball valve is usually connected to the rear end of the heat meter, but this will result in a relatively high cost. To solve the above problems, someone has improved the structure of the existing heat meter and proposed a fluid flow regulating device with a patent application number of 202120529447.3. It includes a pipe body, a detection component and an adjustment component. Among them, the detection component includes a first transducer, a second transducer and a transfer member arranged on the pipe body. The transfer member includes a first reflecting column, a second reflecting column and a third reflecting column. The first transducer and the second transducer are spaced apart, and the transfer member can transmit the detection signal emitted by the first transducer to the second transducer. A detection section is arranged inside the pipe body. The inner diameter of the detection section is smaller than the inner diameter of the pipe body, and the detection section is located between the first transducer and the second transducer; the adjustment component includes a ball core, a connecting pipe and a control rod. The connecting pipe is connected to the pipe body. The ball core is rotatably arranged between the pipe body and the connecting pipe. A through hole communicating with the inside of the pipe body is provided on the ball core. The control rod is rotatably arranged in a control hole provided on the pipe body. The inner end of the control rod is connected to the ball core and can drive the ball core to rotate. A first flap and a second flap for blocking the through hole are arranged on the ball core. One end of the first flap and the second flap are connected or close to each other to form an adjustment hole. Among them, the detection component mainly realizes metering, and the ball core is used to realize the regulation of the flow rate, especially the linear regulation of the flow rate through the setting of the adjustment hole.

[0003] However, the above-mentioned fluid flow regulating device also has deficiencies: the detection section is directly machined inside the pipe body. The pipe body is usually a brass part, and the smoothness of its inner wall is not high, which has a large resistance coefficient to the flow of water. This means that the flow of water in the detection section is not very smooth, and scale is likely to form on the inner wall of the detection section after long-term use, further affecting the smoothness of water flow. Therefore, there is a problem that the metering accuracy deteriorates after long-term use. Summary of the Utility Model

[0004] The purpose of the present utility model is to propose a basic meter of an ultrasonic heat meter for the above problems existing in the prior art, and solve the problem that the metering accuracy deteriorates after long-term use.

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

[0006] The base meter of an ultrasonic heat meter includes a body in a tubular shape with an inlet end and an outlet end at both ends. A valve ball and a valve rod with its lower end connected to the valve ball are arranged in the outlet end. The side of the valve ball has a flow regulating hole for linearly regulating the flow rate. Two reflecting columns are arranged along the axial direction of the body. Both reflecting columns are vertically arranged and their lower ends are fixed to the body. It is characterized in that a flow stabilizing pipe is arranged between the two reflecting columns in the body. The flow stabilizing pipe is a plastic part. The two ends of the flow stabilizing pipe expand outwards to form a flared shape relative to the rest of the flow stabilizing pipe. An annular convex part is arranged on the outer side of the flow stabilizing pipe along the circumferential direction. The outer diameter of the annular convex part matches the inner diameter of the body. An annular sealing groove is arranged on the outer side of the annular convex part. A sealing ring is arranged in the annular sealing groove. The sealing ring abuts against the inner wall of the body to form a seal. First notches communicating with the inner hole of the flow stabilizing pipe are arranged at the bottoms of both ends of the flow stabilizing pipe. The lower ends of the two reflecting columns are respectively located in the two first notches. The inner wall of the first notch is an arc surface. The outer side wall of the reflecting column abuts against the inner wall of the first notch.

[0007] By arranging a flow stabilizing pipe in the body and using the inner hole of the flow stabilizing pipe as a detection section, since the flow stabilizing pipe is a plastic part, its inner wall is smoother, the resistance coefficient is small, the water flow in the flow stabilizing pipe is more smooth and stable, and it is not easy to form scale even after long-term use, thus well ensuring the accuracy of measurement. Moreover, first notches communicating with the inner hole of the flow stabilizing pipe are arranged at the bottoms of both ends of the flow stabilizing pipe. The lower ends of the two reflecting columns are respectively located in the two first notches. The inner wall of the first notch is an arc surface. The outer side wall of the reflecting column abuts against the inner wall of the first notch. In this way, the flow stabilizing pipe is axially abutted by the two reflecting columns to limit its movement, and at the same time, the flow stabilizing pipe will not rotate, thus ensuring the reliability of the structure, and at the same time, there is no need to separately set up special components to fix the flow stabilizing pipe.

[0008] In addition, the setting of the sealing ring ensures that no water leaks from between the body and the flow stabilizing pipe to affect the accuracy of measurement, and the flow stabilizing pipe will not cause the sealing ring to be worn because its movement is restricted both axially and circumferentially.

[0009] In the base meter of the above ultrasonic heat meter, installation parts are respectively convexly arranged at the positions corresponding to the two reflecting columns on the top of the body. Both installation parts have transducer installation holes. Two relief holes are arranged on the top wall of the body. The two relief holes are respectively located below the two transducer installation holes. The two relief holes respectively connect the corresponding transducer installation holes with the inside of the body. The two ends of the flow stabilizing pipe are respectively located below the two relief holes. Second notches communicating with the inner hole of the flow stabilizing pipe are arranged at the tops of both ends of the flow stabilizing pipe. The upward projections of the two first notches are respectively located inside the two second notches.

[0010] In practice, the reflecting columns are sequentially installed and fixed into the main body from top to bottom through the corresponding transducer mounting holes and relief holes. Since two reflecting columns are used to fix the flow stabilizer tube in the main body, second notches that are both communicated with the inner hole of the flow stabilizer tube are provided at the top ends of both ends of the flow stabilizer tube, and the second notches are used to make way for the reflecting columns, so as to avoid the setting of the flow stabilizer tube affecting the normal installation and fixation of the reflecting columns.

[0011] In the base meter of the ultrasonic heat meter described above, the inner wall of the second notch is an arc surface, and the inner wall of the second notch is flush with the hole wall of the relief hole.

[0012] The inner wall of the second notch is an arc surface, and the inner wall of the second notch is flush with the hole wall of the relief hole, indicating that there will be no solid part at the end of the flow stabilizer tube blocking directly below the relief hole, so that it will not affect the normal cooperation between the reflecting column and the corresponding transducer.

[0013] In the base meter of the ultrasonic heat meter described above, a plurality of reinforcing ribs are fixedly connected along the axial direction on the outer side of the flow stabilizer tube, and the reinforcing ribs are evenly distributed around the center line of the flow stabilizer tube, and each reinforcing rib partially overlaps with the annular convex part.

[0014] The flow stabilizer tube only has the outer diameter of the annular convex part matched with the inner diameter of the main body, and the structural strength of the flow stabilizer tube can be increased by the arrangement of each reinforcing rib.

[0015] In the base meter of the ultrasonic heat meter described above, the number of the annular convex parts is two, and the two annular convex parts are respectively located at positions close to both ends of the flow stabilizer tube, and each annular convex part is provided with the above-mentioned sealing ring.

[0016] Through the above setting, the sealing effect between the flow stabilizer tube and the main body can be further improved.

[0017] In the base meter of the ultrasonic heat meter described above, the main body includes a main body and a valve seat. The main body sequentially has a first mounting hole and a second mounting hole along the axial direction. A circular ring-shaped partition part is provided in the main body. The first mounting hole and the second mounting hole are located on both sides of the partition part. The first mounting hole penetrates one end of the main body, and the second mounting hole penetrates the other end of the main body. The flow stabilizer tube is located in the first mounting hole. The orifice of the second mounting hole has an internal thread and one end of the valve seat is threadedly connected into the second mounting hole. A valve ball is located in the second mounting hole. Sealing washers are abutted between the valve ball and the partition part and between the valve ball and the valve seat. A water passing hole is provided on the side of the valve ball. The flow regulating hole is communicated with the water passing hole. The opening direction of the flow regulating hole is the same as that of the water passing hole, and the projection of the flow regulating hole along the axial direction of the main body is located inside the water passing hole.

[0018] In the prior art, the detection section is directly machined within the body. Obviously, the machining of the detection section requires machining from both ends of the body inward respectively to obtain it. This leads to the need to fixedly install another component within the body to abut against and set the sealing gasket. In the base meter of this ultrasonic heat meter, since the inner hole of the flow stabilizer tube is used as the detection section to replace directly machining the corresponding detection section within the body, a partition section can be directly machined within the body to abut against and set the sealing gasket, without the need to fixedly install another component within the body to abut against and set the sealing gasket. Thus, the structure is simplified to a certain extent.

[0019] In the base meter of the above-mentioned ultrasonic heat meter, a temperature measurement hole communicating with the water passing hole is provided at the bottom of the valve ball. A temperature measurement section is protrudingly provided at the position corresponding to the valve ball at the bottom of the main body. The temperature measurement section is provided with a temperature measurement port which has internal threads. A communication hole communicating the second installation hole with the temperature measurement port is provided on the bottom wall of the main body. The temperature measurement port is located below the communication hole.

[0020] Such a setting enables the base meter of this ultrasonic heat meter to also have the function of temperature measurement. When measuring temperature, the temperature sensor is threadedly connected to the temperature measurement port, and the probe of the temperature sensor extends into the water passing hole of the valve ball through the communication hole and the temperature measurement hole. When temperature measurement is not required, the temperature sensor is disassembled, and a plug is threadedly connected into the internal threads of the temperature measurement port.

[0021] In the base meter of the above-mentioned ultrasonic heat meter, a neck is protrudingly provided at the position corresponding to the valve ball at the top of the main body. The valve rod passes through the neck. One of the installation parts is arranged close to the neck. Convex ribs are integrally and fixedly connected between the two installation parts outside the main body and between the neck and the adjacent installation part.

[0022] The setting of the convex ribs can significantly increase the structural strength of the main body and ensure the service life.

[0023] Compared with the prior art, the base meter of this ultrasonic heat meter has the following advantages:

[0024] 1. By arranging a flow stabilizer tube within the body and using the inner hole of the flow stabilizer tube as the detection section, since the flow stabilizer tube is a plastic part, its inner wall is smoother, the resistance coefficient is small, the flow of water within the flow stabilizer tube is smoother and more stable, and even after long-term use, it is not easy to form scale. Thus, the accuracy of measurement is well ensured;

[0025] 2. By providing first notches communicating with the inner bore of the flow stabilizer tube at both bottom ends of the flow stabilizer tube, the lower ends of the two reflecting columns are respectively located in the two first notches. The inner wall of the first notch is an arc surface, and the outer side wall of the reflecting column is in abutment with the inner wall of the first notch. In this way, the flow stabilizer tube is axially abutted by the two reflecting columns to limit its movement, and at the same time, the flow stabilizer tube will not rotate, thereby ensuring the reliability of the structure. At the same time, there is no need to additionally provide special components to fix the flow stabilizer tube.

[0026] 3. The setting of the sealing ring ensures that water will not leak from between the body and the flow stabilizer tube to affect the measurement accuracy, and since the movement of the flow stabilizer tube is restricted both axially and circumferentially, the sealing ring will not be worn. Brief Description of the Drawings

[0027] Figure 1 is a three-dimensional schematic view of the basic meter of this ultrasonic heat meter.

[0028] Figure 2 is a sectional view of the basic meter of this ultrasonic heat meter.

[0029] Figure 3 is a schematic view of the fit between the reflecting column and the flow stabilizer tube.

[0030] Figure 4 is a schematic view of the fit between the reflecting column and the flow stabilizer tube from another angle.

[0031] Figure 5 is a three-dimensional schematic view of the flow stabilizer tube.

[0032] Figure 6 is a three-dimensional schematic view of the valve ball.

[0033] Figure 7 is another three-dimensional schematic view of the valve ball.

[0034] In the figures, 1. Body; 1a. Main body; 1a1. Convex head; 1a11. Positioning hole; 1a2. Mounting part; 1a21. Transducer mounting hole; 1a3. Relief hole; 1a4. Partition part; 1a5. Neck; 1a6. Rib; 1a7. Temperature measuring part; 1a71. Temperature measuring port; 1a8. Communication hole; 1b. Valve seat; 2. Valve ball; 2a. Flow regulating hole; 2b. Water passing hole; 2c. Temperature measuring hole; 3. Valve rod; 4. Reflecting column; 5. Flow stabilizer tube; 5a. Annular convex part; 5a1. Annular sealing groove; 5b. First notch; 5c. Second notch; 5d. Reinforcing rib; 6. Sealing ring; 7. Sealing washer. Detailed Embodiments

[0035] The following are specific embodiments of the present invention in combination with the drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0036] As Figure 1 and Figure 2 shown, a base meter of an ultrasonic heat meter includes a body 1 in a tubular shape with a water inlet end and a water outlet end at both ends respectively. A valve ball 2 is arranged in the water outlet end, and a valve rod 3 with its lower end connected to the valve ball 2. Two reflecting columns 4 are arranged along the axial direction of the body 1. Both reflecting columns 4 are arranged vertically, and the lower ends of both reflecting columns 4 are fixed to the body 1. Specifically, two convex heads 1a1 protrude from the bottom of the body 1. Each of the two convex heads 1a1 has a positioning hole 1a11 communicating with the inside of the body 1. The lower ends of the two reflecting columns 4 are respectively tightly fixed in the two positioning holes 1a11. At positions corresponding to the two reflecting columns 4 on the top of the body 1, two mounting parts 1a2 protrude respectively. Both mounting parts 1a2 have transducer mounting holes 1a21. Two relief holes 1a3 are provided on the top wall of the body 1. The two relief holes 1a3 are respectively located below the two transducer mounting holes 1a21, and the two relief holes 1a3 respectively communicate the corresponding transducer mounting holes 1a21 with the inside of the body 1. The tops of the two reflecting columns 4 both have inclined reflecting surfaces. The inclined directions of the two reflecting surfaces are opposite and the inclined angles are the same. The distance between the two reflecting surfaces gradually decreases from top to bottom.

[0037] Furthermore, as Figure 2 、 Figure 3 、 Figure 4 and Figure 5As shown in the figure, a flow stabilizer tube 5 is provided between two reflecting columns 4 inside the main body 1. The flow stabilizer tube 5 is a plastic tube. The two ends of the flow stabilizer tube 5 expand outward relative to the rest of the flow stabilizer tube 5 to form a flared shape. An annular convex portion 5a is provided on the outer side of the flow stabilizer tube 5 along the circumferential direction. The outer diameter of the annular convex portion 5a is matched with the inner diameter of the main body 1. An annular sealing groove 5a1 is provided on the outer side of the annular convex portion 5a. A sealing ring 6 is provided in the annular sealing groove 5a1. The sealing ring 6 abuts against the inner wall of the main body 1 to form a seal. At the bottom of both ends of the flow stabilizer tube 5, first notches 5b communicating with the inner hole of the flow stabilizer tube 5 are provided. The lower ends of the two reflecting columns 4 are respectively located in the two first notches 5b. The inner wall of the first notch 5b is an arc surface. The outer side wall of the reflecting column 4 abuts against the inner wall of the first notch 5b. The inner walls of the two first notches 5b are respectively flush with the hole walls of the corresponding positioning holes 1a11 where the reflecting columns 4 are located. The two ends of the flow stabilizer tube 5 are respectively located below the two relief holes 1a3. At the top of both ends of the flow stabilizer tube 5, second notches 5c communicating with the inner hole of the flow stabilizer tube 5 are provided. The upward projections of the two first notches 5b are respectively located inside the two second notches 5c. In this embodiment, the inner wall of the second notch 5c is an arc surface, and the inner wall of the second notch 5c is flush with the hole wall of the relief hole 1a3. A plurality of reinforcing ribs 5d are fixedly connected to the outer side of the flow stabilizer tube 5 along the axial direction. The reinforcing ribs 5d are evenly distributed around the center line of the flow stabilizer tube 5. Each reinforcing rib 5d partially overlaps with the annular convex portion 5a. The number of the annular convex portions 5a is two. The two annular convex portions 5a are respectively located at positions close to both ends of the flow stabilizer tube 5. Each annular convex portion 5a is provided with the above-mentioned sealing ring 6.

[0038] By arranging the flow stabilizer tube 5 inside the main body 1 and using the inner hole of the flow stabilizer tube 5 as a detection section, since the flow stabilizer tube 5 is a plastic part, its inner wall is smoother, the resistance coefficient is small, the water flow is more smooth and stable inside the flow stabilizer tube 5, and it is not easy to form scale even after long-term use, thus well ensuring the accuracy of measurement. Moreover, first notches 5b communicating with the inner hole of the flow stabilizer tube 5 are provided at the bottom of both ends of the flow stabilizer tube 5. The lower ends of the two reflecting columns 4 are respectively located in the two first notches 5b. The inner wall of the first notch 5b is an arc surface. The outer side wall of the reflecting column 4 abuts against the inner wall of the first notch 5b. In this way, the flow stabilizer tube 5 is axially abutted by the two reflecting columns 4 to limit the movement, and at the same time, the flow stabilizer tube 5 will not rotate, thus ensuring the reliability of the structure, and at the same time, there is no need to additionally set up special components to fix the flow stabilizer tube 5.

[0039] In addition, the setting of the sealing ring 6 ensures that no water leaks from between the main body 1 and the flow stabilizer tube 5 to affect the accuracy of measurement, and since the movement of the flow stabilizer tube 5 is restricted both axially and circumferentially, the sealing ring 6 will not be worn.

[0040] Further, as Figure 1 and Figure 2As shown, the body 1 includes a main body 1a and a valve seat 1b. Both the main body 1a and the valve seat 1b are made of brass. The main body 1a has a first mounting hole and a second mounting hole in sequence along the axial direction. There is an annular partition 1a4 inside the main body 1a. The first mounting hole and the second mounting hole are located on both sides of the partition 1a4. The first mounting hole penetrates one end of the main body 1a, and the second mounting hole penetrates the other end of the main body 1a. The flow stabilizing pipe 5 is located in the first mounting hole. There is an internal thread at the orifice of the second mounting hole, and one end of the valve seat 1b is threadedly connected in the second mounting hole. The valve ball 2 is located in the second mounting hole. Sealing washers 7 are abutted and arranged between the valve ball 2 and the partition 1a4 and between the valve ball 2 and the valve seat 1b. A neck 1a5 protrudes at the position corresponding to the valve ball 2 at the top of the main body 1a. The valve stem 3 passes through the neck 1a5. One of its mounting parts 1a2 is arranged close to the neck 1a5. Ribs 1a6 are integrally fixed outside the main body 1a between the two mounting parts 1a2 and between the neck 1a5 and the adjacent mounting part 1a2. The ribs 1a6 can significantly increase the structural strength of the main body 1a and ensure the service life.

[0041] As Figure 2 , Figure 6 and Figure 7As shown, the side of the valve ball 2 is provided with a flow regulating hole 2a capable of linearly regulating the flow rate. The side of the valve ball 2 is also provided with a water passing hole 2b. The flow regulating hole 2a is communicated with the water passing hole 2b. The opening direction of the flow regulating hole 2a is the same as that of the water passing hole 2b, and the projection of the flow regulating hole 2a along the axial direction of the main body 1a is located inside the water passing hole 2b. The flow regulating hole 2a has an upper side hole wall and a lower side hole wall. Both the upper side hole wall and the lower side hole wall of the flow regulating hole 2a are inclined. The inclination directions of the upper side hole wall and the lower side hole wall of the flow regulating hole 2a are opposite, and the inclination angles are the same. One end of the upper side hole wall of the flow regulating hole 2a is connected to one end of the lower side hole wall of the flow regulating hole 2a. In practice, the flow regulating hole 2a is generally an isosceles triangle. The principle of realizing linear flow regulation is as follows: When the valve ball 2 is in a state of separating the water inlet end and the water outlet end of the main body 1, the flow regulating hole 2a of the valve ball 2 and the central hole of the sealing gasket 7 are in a completely staggered state. When the valve ball 2 rotates, the flow regulating hole 2a of the valve ball 2 and the central hole of the sealing gasket 7 gradually coincide from completely staggered. The overlapping part of the flow regulating hole 2a and the central hole of the sealing gasket 7 linearly increases as the rotation angle of the valve ball 2 increases, thereby realizing linear flow regulation. A temperature measuring hole 2c communicated with the water passing hole 2b is provided at the bottom of the valve ball 2. A temperature measuring part 1a7 is protrudingly provided at a position corresponding to the valve ball 2 at the bottom of the main body 1a. The temperature measuring part 1a7 is provided with a temperature measuring port 1a71, and the temperature measuring port 1a71 has an internal thread. A communication hole 1a8 communicating the second installation hole with the temperature measuring port 1a71 is provided on the bottom wall of the main body 1a. The temperature measuring port 1a71 is located below the communication hole 1a8. Such a setting enables the basic meter of this ultrasonic heat meter to also have a temperature measuring function. When measuring the temperature, the temperature sensor is threadedly connected to the temperature measuring port 1a71, and the probe of the temperature sensor extends into the water passing hole 2b of the valve ball 2 through the communication hole 1a8 and the temperature measuring hole 2c. When the temperature measurement is not required, the temperature sensor is disassembled, and a plug is threadedly connected into the internal thread of the temperature measuring port 1a71.

[0042] The specific embodiments described herein are merely illustrative of the spirit of the present utility model. Those skilled in the art of the present utility model can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present utility model or exceed the scope defined by the appended claims.

Claims

1. The basic meter of an ultrasonic heat meter, comprising a body (1) in a tubular shape with an inlet end and an outlet end at both ends respectively. A valve ball (2) and a valve rod (3) with its lower end connected to the valve ball (2) are arranged in the outlet end. The side of the valve ball (2) is provided with a flow regulating hole (2a) capable of linearly regulating the flow rate. Two reflecting columns (4) are arranged along the axial direction of the body (1). Both reflecting columns (4) are arranged vertically and the lower ends of both reflecting columns (4) are fixed to the body (1). It is characterized in that, A flow stabilizing pipe (5) is arranged between two reflecting columns (4) inside the described body (1). The flow stabilizing pipe (5) is a plastic part. The two ends of the flow stabilizing pipe (5) expand outward relative to the remaining positions of the flow stabilizing pipe (5) to form a flared shape. An annular convex portion (5a) is arranged on the outer side of the flow stabilizing pipe (5) along the circumferential direction. The outer diameter of the annular convex portion (5a) is matched with the inner diameter of the body (1). An annular sealing groove (5a1) is formed on the outer side of the annular convex portion (5a). A sealing ring (6) is arranged in the annular sealing groove (5a1). The sealing ring (6) abuts against the inner wall of the body (1) to form a seal. First notches (5b) communicating with the inner hole of the flow stabilizing pipe (5) are arranged at the bottoms of both ends of the flow stabilizing pipe (5). The lower ends of the two reflecting columns (4) are respectively located in the two first notches (5b). The inner wall of the first notch (5b) is an arc surface. The outer side wall of the reflecting column (4) abuts against the inner wall of the first notch (5b).

2. The base meter of an ultrasonic heat meter according to claim 1, characterized in that, At positions corresponding to the two reflecting columns (4) on the top of the described body (1), mounting portions (1a2) are respectively protrudingly arranged. Both mounting portions (1a2) have transducer mounting holes (1a21). Two relief holes (1a3) are arranged on the top wall of the body (1). The two relief holes (1a3) are respectively located below the two transducer mounting holes (1a21). The two relief holes (1a3) respectively connect the corresponding transducer mounting holes (1a21) with the inside of the body (1). Both ends of the flow stabilizing pipe (5) are respectively located below the two relief holes (1a3). Second notches (5c) communicating with the inner hole of the flow stabilizing pipe (5) are arranged at the tops of both ends of the flow stabilizing pipe (5). The upward projections of the two first notches (5b) are respectively located inside the two second notches (5c).

3. The base meter of an ultrasonic heat meter according to claim 2, characterized in that, The inner wall of the described second notch (5c) is an arc surface. The inner wall of the second notch (5c) is flush with the hole wall of the relief hole (1a3).

4. The base meter of an ultrasonic heat meter according to claim 3, characterized in that, A plurality of reinforcing ribs (5d) are fixedly connected to the outer side of the flow stabilizing pipe (5) along the axial direction. The reinforcing ribs (5d) are evenly distributed around the center line of the flow stabilizing pipe (5). Each reinforcing rib (5d) partially overlaps with the annular convex portion (5a).

5. The base meter of an ultrasonic heat meter according to claim 4, characterized in that, The number of the annular convex portions (5a) is two. The two annular convex portions (5a) are respectively located at positions close to both ends of the flow stabilizing pipe (5). Each annular convex portion (5a) is provided with the above-mentioned sealing ring (6).

6. The base meter of an ultrasonic heat meter according to claim 2 or 3 or 4 or 5, characterized in that, The described body (1) includes a main body (1a) and a valve seat (1b). The main body (1a) has a first mounting hole and a second mounting hole axially in sequence. There is an annular partition part (1a4) in the main body (1a). The first mounting hole and the second mounting hole are on both sides of the partition part (1a4). The first mounting hole penetrates one end of the main body (1a), and the second mounting hole penetrates the other end of the main body (1a). The steady flow pipe (5) is located in the first mounting hole. The orifice of the second mounting hole has internal threads and one end of the valve seat (1b) is threadedly connected into the second mounting hole. The valve ball (2) is located in the second mounting hole. Sealing washers (7) are provided in abutting contact between the valve ball (2) and the partition part (1a4) and between the valve ball (2) and the valve seat (1b). The side of the valve ball (2) has a water passing hole (2b). The flow regulating hole (2a) is communicated with the water passing hole (2b). The opening direction of the flow regulating hole (2a) is the same as that of the water passing hole (2b), and the projection of the flow regulating hole (2a) along the axial direction of the main body (1a) is located inside the water passing hole (2b).

7. The base meter of an ultrasonic heat meter according to claim 6, characterized in that, A temperature measuring hole (2c) communicated with the water passing hole (2b) is provided at the bottom of the described valve ball (2). A temperature measuring part (1a7) is protrudingly provided at a position corresponding to the valve ball (2) at the bottom of the main body (1a). The temperature measuring part (1a7) is provided with a temperature measuring port (1a71). The temperature measuring port (1a71) has internal threads. A communication hole (1a8) communicating the second mounting hole with the temperature measuring port (1a71) is provided on the bottom wall of the main body (1a). The temperature measuring port (1a71) is located below the communication hole (1a8).

8. The base meter of an ultrasonic heat meter according to claim 7, characterized in that A neck part (1a5) is protrudingly provided at a position corresponding to the valve ball (2) at the top of the described main body (1a). The valve rod (3) passes out of the neck part (1a5). One of the mounting parts (1a2) is arranged close to the neck part (1a5). Ribs (1a6) are integrally and fixedly connected outside the main body (1a) between the two mounting parts (1a2) and between the neck part (1a5) and the adjacent mounting part (1a2).

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