Pulse flowmeter

Abstract

The utility model discloses a pulse flowmeter which comprises a bottom shell and an upper cover, the bottom shell and the upper cover are connected in a matched mode through a buckle type structure, a sealing ring is arranged at the joint of the bottom shell and the upper cover, an inlet connecting pipe is arranged on the outer side of the bottom shell, the inlet connecting pipe is communicated with an inner cavity of the bottom shell, and an impeller is arranged in the bottom shell in a rotating connection mode. Opposite magnets are arranged in the impeller, an outlet connecting pipe is arranged on the outer side of the upper cover and communicated with an inner cavity of the upper cover, and an electronic connecting module is arranged on the upper portion of the upper cover. Compared with a common threaded connection or welding connection mode, disassembly, assembly and follow-up maintenance are effectively facilitated, and the service life of the flow meter is prolonged; the sealing ring is arranged at the joint of the bottom shell and the upper cover, leakage points at the connecting position can be avoided through the sealing ring, the sealing performance of the flow meter is enhanced, and measured numerical values are more accurate. The pulse flowmeter is simple in structure, reliable in connection of all parts, small in size, stable in installation and high in use reliability.

Description

TECHNICAL FIELD

[0001] The utility model relates to flowmeter technical field, concretely relates to a pulse flowmeter. BACKGROUND

[0002] The pulse flowmeter is provided with an impeller in the center of the body, and the impeller is fixed at both ends. When fluid passes through the pipeline, the impeller is impacted by the fluid, and a driving torque is generated on the impeller. The impeller overcomes the friction torque and fluid resistance torque to generate rotation. Within a certain flow range, for a certain fluid medium viscosity, the rotational angular velocity of the impeller is proportional to the fluid flow rate. Therefore, the fluid flow rate can be obtained by the rotational angular velocity of the impeller, and the fluid flow rate passing through the pipeline can be calculated.

[0003] The pulse flowmeter currently adopts threaded connection or welding between the bottom shell and the upper cover, which causes the problems of running, bleeding, dripping and leaking at the connection position, which affects the accuracy of the flowmeter in measurement.

[0004] In view of the above, it is urgent to develop a pulse flowmeter. UTILITY MODEL CONTENTS

[0005] In view of the deficiencies of the prior art, the utility model provides a pulse flowmeter which can avoid the leakage at the connection position, enhance the sealing performance of the flowmeter, and make the measured value more accurate.

[0006] To achieve the above purpose, the utility model realizes the following technical scheme:

[0007] A pulse flowmeter comprises a body, the body comprises a bottom shell and an upper cover, the bottom shell and the upper cover are connected in a buckle type structure, a sealing ring is arranged at the joint of the bottom shell and the upper cover, an inlet connecting pipe is arranged on the outer side of the bottom shell, the inlet connecting pipe is connected with the inner cavity of the bottom shell, an impeller is rotatably arranged in the inner cavity of the bottom shell, magnets are arranged in the impeller in a symmetrical manner, an outlet connecting pipe is arranged on the outer side of the upper cover, the outlet connecting pipe is connected with the inner cavity of the upper cover, and an electronic connection module is arranged on the upper part of the upper cover.

[0008] Further, a plurality of clamping protrusions are arranged on the outer side of the bottom shell in a circumferentially equal distribution, a bottom surface of each clamping protrusion is provided with a rotation stopping strip, an inner buckle is arranged on the inner side of the upper cover and matched with the clamping protrusion, and a rotation stopping groove matched with the rotation stopping strip is arranged on the top surface of the inner buckle.

[0009] Further, a connecting column extending upward is arranged in the inner cavity of the bottom shell, the top end of the connecting column is a conical surface, a connecting sleeve matched with the connecting column is arranged on the bottom of the impeller, a convex body is arranged on the top of the impeller, an accommodating cavity is arranged in the convex body, the accommodating cavity is an open structure at the top, and the magnets are symmetrically embedded in the accommodating cavity.

[0010] Further, the upper end surface of the bottom shell is provided with an annular groove, and the sealing ring is embedded in the annular groove and forms a sealing fit with the lower end surface of the upper cover.

[0011] Further, the electronic connection module comprises a packaging shell and a connection wire set; the inside of the packaging shell is provided with a circuit board and a sensor electrically connected with the circuit board, the connection wire set is led out from the packaging shell and electrically connected with the circuit board; the inside of the packaging shell is filled with a solidified plastic body to seal and package the circuit board and the sensor.

[0012] Further, the upper part of the upper cover is provided with a mounting position matched with the shape of the packaging shell, and the two sides of the mounting position are provided with groove positions with buckle edges, and correspondingly, the two sides of the packaging shell are provided with clamping blocks matched with the buckle edges.

[0013] Compared with the prior art, the utility model has the following beneficial effects:

[0014] The pulse flowmeter is connected in a buckle type structure, which is more convenient to disassemble and maintain than common screw connection or welding connection, prolongs the service life of the flowmeter, and the sealing ring arranged at the joint of the bottom shell and the upper cover can avoid leakage at the connection position, enhances the sealing performance of the flowmeter, and makes the measured value more accurate. BRIEF DESCRIPTION OF DRAWINGS

[0015] Figure 1 Fig. 1 is a perspective view of the pulse flowmeter;

[0016] Figure 2 Fig. 2 is an exploded assembly view of the pulse flowmeter;

[0017] Figure 3 Fig. 3 is a perspective view of the bottom shell;

[0018] Figure 4 Fig. 4 is a perspective view of the bottom shell;

[0019] Figure 5 Fig. 5 is a perspective view of the upper cover;

[0020] Figure 6 Fig. 6 is a perspective view of the upper cover;

[0021] Figure 7 Fig. 7 is a perspective view of the impeller;

[0022] Figure 8 Fig. 8 is a perspective view of the impeller;

[0023] Figure 9The electronic connection module is shown in an exploded assembly view.

[0024] In the figure: 1, bottom shell; 2, upper cover; 3, sealing ring; 4, impeller; 5, magnet; 6, electronic connection module; 10, inlet connecting pipe; 11, clamping convex; 12, connecting column; 13, annular groove; 20, outlet connecting pipe; 21, inner buckle; 22, mounting position; 61, packaging shell; 62, circuit board; 63, sensor; 64, connecting wire group; 65, plastic body; 111, rotation stopping strip; 211, rotation stopping groove; 212, groove position; 421, cavity; 2110, buckling edge. DETAILED DESCRIPTION

[0025] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0026] Referring to Figures 1-9 The present application provides a technical solution: a pulse flowmeter, comprising a body, the body comprising a bottom shell 1 and an upper cover 2, the bottom shell 1 and the upper cover 2 are connected in a snap-fit structure, and a sealing ring 3 is arranged at the joint of the bottom shell 1 and the upper cover 2, an inlet connecting pipe 10 is arranged on the outside of the bottom shell 1, the inlet connecting pipe 10 communicates with the internal cavity of the bottom shell 1, a rotatably connected impeller 4 is arranged in the bottom shell 1, a magnet 5 is arranged in the impeller 4, an outlet connecting pipe 20 is arranged on the outside of the upper cover 2, the outlet connecting pipe 20 communicates with the internal cavity of the upper cover 2, and an electronic connection module 6 is arranged on the upper part of the upper cover 2. The pulse flowmeter has the advantages that, compared with the common screw connection or welding connection mode, it is effectively convenient to disassemble and assemble and to maintain subsequently, and the service life of the flowmeter is improved; the sealing ring 3 is arranged at the joint of the bottom shell 1 and the upper cover 2, the sealing ring 3 can avoid the occurrence of leakage at the connection position, the sealing property of the flowmeter is enhanced, and the measured value is more accurate.

[0027] Referring to Figures 3-5As shown, the outer side of the bottom shell 1 is provided with a plurality of clamping protrusions 11 distributed equally in the circumference, the bottom surface of each clamping protrusion 11 is provided with a rotation stopping strip 111, the inner side of the upper cover 2 is provided with an inner buckle 21 matched with the clamping protrusion 11, and the top surface of the inner buckle 21 is provided with a rotation stopping groove 211 matched with the rotation stopping strip 111. By providing a plurality of clamping protrusions 11 on the bottom shell 1 and an inner buckle 21 corresponding thereto on the upper cover 2, a snap-fit connection structure is formed, which is more convenient for disassembly and maintenance than the common threaded connection or welding connection, thereby prolonging the service life of the flow meter. In addition, the rotation stopping strip 111 is provided on the clamping protrusion 11, and the rotation stopping groove 211 corresponding thereto is provided on the inner buckle 21, thereby forming a rotation stopping and falling prevention structure to prevent the flow meter from loosening due to external or self vibration.

[0028] As shown in Figures 3-4 and Figures 7-8 As shown, the inner side of the bottom shell 1 is provided with a connection column 12 extending upward, and the top end of the connection column 12 is a tapered surface. The bottom of the impeller 4 is provided with a connection sleeve 41 matched with the connection column 12, and the top of the impeller 4 is provided with a convex body 42. The inner side of the convex body 42 is provided with a cavity 421, which is an open structure at the top. The magnet 5 is symmetrically embedded in the cavity 421. The top end of the convex body 42 is higher than the fluid outflow height, so as to prevent rust and other impurities in the fluid from adhering to the magnet 5, thereby causing the magnet 5 to be scaled, rusted, or even causing the magnet 5 to lose its magnetic properties. By designing the tapered surface at the top end of the connection column 12 and the connection sleeve 41 matched therewith, the rotation of the impeller 4 is smoother, and the rotation resistance is reduced.

[0029] As shown in Figure 3 As shown, the upper end surface of the bottom shell 1 is provided with an annular groove 13, and the sealing ring 3 is embedded in the annular groove 13 and forms a sealing fit with the lower end surface of the upper cover 2, so as to avoid leakage at the connection position and enhance the sealing performance of the flow meter, thereby making the measured value more accurate.

[0030] As shown in Figure 9 As shown, the electronic connection module 6 includes a packaging shell 61 and a connection wire set 64. The inner side of the packaging shell 61 is provided with a circuit board 62 and a sensor 63 electrically connected with the circuit board. The sensor 63 is a Hall sensor. The connection wire set 64 is led out from the packaging shell 61 and electrically connected with the circuit board 62. The inner side of the packaging shell 61 is filled with a solidified plastic body 65, which seals and packages the circuit board 62 and the sensor 63. The solidified plastic body 65 makes the electronic connection module reach the IP68 protection level.

[0031] As shown in Figure 6As shown, the upper part of the upper cover 2 is provided with a mounting position 22 matched with the shape of the packaging shell 61, and the two sides of the mounting position 22 are provided with groove positions 212 with buckle connecting edges 2110, and correspondingly, the two sides of the packaging shell 61 are provided with clamping blocks 611 matched with the buckle connecting edges 2110, so that the packaging shell 61 can be stably mounted.

[0032] The assembly process of the pulse flowmeter: embed the sealing ring 3 in the annular groove 13 of the bottom shell 1; the impeller 4 is sleeved on the tapered surface of the connecting column 12 through the connecting sleeve 41 to ensure free rotation; the upper cover 2 is clamped with the clamping convex 11 through the inner buckle 21, and the rotation stopping strip 111 is clamped into the rotation stopping groove 211 to prevent loosening; the electronic connection module 6 is mounted on the upper cover mounting position 22 and fixed to the upper cover groove position 212 through the clamping block 611, and the connection line group 64 is connected with the signal processing device.

[0033] Working principle: fluid driving and impeller rotation: the fluid enters the bottom shell cavity from the inlet connecting pipe 10, impacts the impeller 4 to make it rotate around the connecting column 12; the tapered surface and the connecting sleeve 41 reduce the contact area and reduce the rotation resistance, improve the response sensitivity. Magnetic pulse signal generation: when the impeller 4 rotates, the symmetrical magnet 5 periodically passes through the sensor 63 sensing area; the sensor 63 converts the magnetic flux change into an electric pulse signal, which is processed into flow data by the circuit board 62. Signal output and protection: the connection line group 64 outputs the flow signal to the external device; the solidified plastic body 65 isolates water vapor and dust to ensure the long-term stability of the electronic connection module.

Claims

1. A pulse flow meter, comprising a body, said body including a bottom shell (1) and a top cover (2), characterized in that, The bottom shell (1) and the top cover (2) are connected by a snap-fit ​​structure, and a sealing ring (3) is provided at the joint of the bottom shell (1) and the top cover (2). An inlet connecting pipe (10) is provided on the outside of the bottom shell (1), and the inlet connecting pipe (10) connects to the internal cavity of the bottom shell (1). An impeller (4) is provided inside the bottom shell (1) and is rotatably connected. A magnet (5) is provided inside the impeller (4) and is arranged opposite to it. An outlet connecting pipe (20) is provided on the outside of the top cover (2), and the outlet connecting pipe (20) connects to the internal cavity of the top cover (2). An electronic connection module (6) is provided on the upper part of the top cover (2).

2. The pulse flow meter according to claim 1, characterized in that, The outer side of the bottom shell (1) is provided with a plurality of circumferentially distributed protrusions (11), and the bottom surface of each protrusion (11) is provided with an anti-rotation strip (111). The inner side of the top cover (2) is provided with an inner buckle (21) that is connected to the protrusions (11), and the top surface of the inner buckle (21) is provided with an anti-rotation groove (211) that is adapted to the anti-rotation strip (111).

3. The pulse flow meter according to claim 1, characterized in that, The bottom shell (1) has an upwardly extending connecting column (12) in the center of its interior. The top of the connecting column (12) is a conical surface. The bottom of the impeller (4) is provided with a connecting sleeve (41) that is compatible with the connecting column (12). The top of the impeller (4) is provided with a protrusion (42). The interior of the protrusion (42) is provided with a cavity (421). The cavity (421) is an open structure at the top. The magnet (5) is symmetrically embedded in the cavity (421).

4. The pulse flow meter according to claim 1, characterized in that, The upper end face of the bottom shell (1) is provided with an annular groove (13), and the sealing ring (3) is embedded in the annular groove (13) and forms a sealing fit with the lower end face of the top cover (2).

5. The pulse flow meter according to claim 1, characterized in that, The electronic connection module (6) includes a package shell (61) and a connecting wire group (64); the package shell (61) is provided with a circuit board (62) and a sensor (63) electrically connected to the circuit board, and the connecting wire group (64) is led out from the package shell (61) and electrically connected to the circuit board (62); The encapsulation shell (61) is filled with a cured plastic body (65) to seal and encapsulate the circuit board (62) and the sensor (63).

6. The pulse flow meter according to claim 5, characterized in that, The upper part of the cover (2) is provided with a mounting position (22) that is adapted to the shape of the encapsulation shell (61). The mounting position (22) is provided with slots (212) with snap-fit ​​edges (2110) on both sides. Correspondingly, the encapsulation shell (61) is provided with snap-fit ​​blocks (611) on both sides that engage with the snap-fit ​​edges (2110).

Images