Single-screw flowmeter capable of being rapidly installed

Abstract

The utility model relates to the technical field of flow meters, and discloses a single-screw flow meter capable of realizing quick installation, which comprises a first shell and a second shell which are communicated with each other, a screw is arranged in the first shell along the axial direction, a magnetic ring is arranged at one end of the screw positioned in the second shell, and a magnetic pole is arranged on the end face of one end of the magnetic ring far away from the screw. A third shell is arranged on the outer side face of the second shell, an induction chip is arranged in the third shell, and the induction end of the induction chip is right opposite to the magnetic pole. By forming the positioning groove in the third cavity and adopting the third shell and the second shell which are detachably connected, on one hand, the induction chip in the third cavity can be accurately positioned, deviation of the installation position of the induction chip is prevented, it is guaranteed that the induction chip is right opposite to the magnetic pole, and therefore the detection precision of the induction chip is improved; when the sensing chip needs to be maintained or replaced in later operation, the sensing chip can be quickly disassembled and assembled, and it is ensured that the flowmeter is put into use again within a short time.

Description

Technical Field

[0001] The utility model belongs to the technical field of flow meters, and in particular relates to a single-screw flow meter that can be quickly installed. Background Art

[0002] Flowmeters are one of the most important instruments in industrial measurement, especially single-screw flowmeters, which are widely used in various fields of industrial manufacturing due to their simple and stable structure. As a type of positive displacement flowmeter, single-screw flowmeters can accurately measure liquid flow. Their working principle is to enclose a screw-shaped measuring rotor in a sealed metering chamber. Driven by the inlet and outlet pressure differential, the liquid flows, thereby driving the measuring rotor to rotate. A continuous independent metering chamber is formed axially between the rotor and the metering chamber. The liquid flows through the chamber by repeatedly filling and emptying from the inlet. The total volume of the fluid is measured based on the number of times the metering chamber is repeatedly filled and discharged with the corresponding volume of fluid.

[0003] Existing single-screw flowmeters typically feature a magnetic ring mounted on the end of the screw shaft. Multiple pairs of magnetic poles are evenly distributed along the circumference of the ring's side. Furthermore, a mounting slot is provided on the side of the flowmeter housing, into which a sensing chip fits, aligned with the side of the magnetic ring. The sensor chip detects the ring's rotation and outputs a pulse signal. The sensor chip is typically glued in place, making its position susceptible to deviation during installation. Furthermore, if the sensor chip malfunctions during operation, it cannot be quickly and easily maintained or replaced, impacting the flowmeter's performance. Summary of the Invention

[0004] In view of this, the purpose of the present invention is to provide a single-screw flowmeter that can be quickly installed, so as to solve the technical problem in the prior art that the installation position of the sensor chip is easily deviated by gluing and is inconvenient for subsequent maintenance and replacement.

[0005] In order to achieve the above-mentioned purpose, the present invention provides the following technical solutions:

[0006] A single-screw flowmeter capable of rapid installation comprises a first housing and a second housing connected to each other, the first housing and the second housing being detachably connected, a screw being axially disposed within the first housing, a magnetic ring being disposed at one end of the screw located within the second housing, a magnetic pole being disposed on an end face of the magnetic ring remote from the screw, a third housing being disposed on an outer surface of the second housing, an extension end of the third housing being radially inserted into the interior of the second housing, a gap being left between the extension end of the third housing and the magnetic ring, an induction chip being disposed within the third housing, an induction end of the induction chip being directly opposite the magnetic pole;

[0007] Furthermore, a cylindrical first cavity is formed axially at the center of the first shell, and a cylindrical second cavity is formed axially at the center of the second shell, and the fluid flows from the first cavity into the second cavity.

[0008] Furthermore, a mounting plane is formed on one side of the second shell, and a mounting hole is formed on the mounting plane. A cylindrical mounting plate is formed on the top of the fixed end of the third shell, and the mounting plate is in contact with the mounting plane. A countersunk hole is formed on the mounting plate, and a threaded hole corresponding to the countersunk hole is formed on the mounting plane. The countersunk hole and the threaded hole are threadedly connected by a screw, thereby achieving fixation between the third shell and the second shell.

[0009] Furthermore, a third cavity is formed in the third housing, and two opposite positioning grooves are formed on the sidewalls of the third cavity. The elongated sensing chip is snapped into the positioning grooves to fix the sensing chip so that the sensing end of the sensing chip is exactly opposite to the magnetic pole.

[0010] Furthermore, a plurality of first blind holes are formed at both ends of the first housing along the axial direction from the outside to the inside, and a plurality of second blind holes corresponding to the first blind holes are formed on the inner side surfaces of the first support and the second support, and the first blind holes and the second blind holes together form a closed latch hole, and the latch holes are distributed on the periphery of the first cavity, and positioning pins are provided in the latch holes, and the positioning pins are used to realize the positioning of the first support and the second support, and ensure that the two are in a directly facing state;

[0011] Furthermore, a protective cover connected to the third shell is provided above the third shell. The protective cover is detachably connected to the mounting plate by screws, and a cable arrangement hole is reserved on the top of the protective cover.

[0012] The beneficial effects of the present invention are:

[0013] (1) Compared with the prior art, by providing a positioning groove in the third cavity and connecting the third shell and the second shell with screws, on the one hand, the sensing chip in the third cavity can be accurately positioned to prevent the deviation of the installation position of the sensing chip and ensure that the sensing chip is aligned with the magnetic pole, thereby improving the detection accuracy of the sensing chip. On the other hand, when the sensing chip needs to be maintained or replaced in the later operation, the sensing chip can be quickly disassembled and installed, ensuring that the flow meter can be put back into use in a short time.

[0014] (2) By setting the magnetic pole at the end face of the magnetic ring and placing the sensing chip directly opposite the magnetic pole, the relative distance between the magnetic pole and the sensing chip remains unchanged. During actual operation, there is only a small deviation in the vertical direction, which can effectively ensure the detection accuracy.

[0015] (3) The positioning of the first support and the second support is realized through the positioning pin, and the two are kept in the opposite state, the installation precision of the screw rod is ensured, and the screw rod is prevented from shaking or swinging in the subsequent use process;

[0016] (4) The first shell and the second shell are detachably connected through screws, in the actual installation process, the parts associated with the first shell and the parts associated with the second shell are respectively assembled with the first shell and the second shell independently, and then the first shell and the second shell are integrally assembled, through the modular design, parallel operation and division of labor can be realized, not only the assembly efficiency is improved, but also the diversified demand is met, and the adaptability and flexibility of the product are enhanced. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to make the purpose, technical scheme and beneficial effects of the utility model clearer, the utility model is provided with the following drawings for description:

[0018] Figure 1 It is the overall schematic view of the single screw flowmeter capable of realizing rapid installation in the utility model embodiment one;

[0019] Figure 2 It is the sectional view of the single screw flowmeter capable of realizing rapid installation in the utility model embodiment one;

[0020] Figure 3 It is Figure 2 the enlarged view of A1 in the utility model embodiment one;

[0021] Figure 4 It is the schematic view of the third shell in the utility model embodiment one.

[0022] The signs in the drawings are as follows:

[0023] The first shell 1, the first cavity 101, the second shell 2, the second cavity 201, the first support 3, the second support 4, the screw rod 5, the magnetic ring 6, the magnetic pole 7, the mounting hole 8, the third shell 9, the third cavity 901, the positioning groove 902, the mounting plate 903, the induction chip 10, the protective cover 11, the positioning pin 12. DETAILED DESCRIPTION

[0024] The utility model embodiment one is specifically as shown in the drawing. Figures 1-4

[0025] ​A single-screw flowmeter that can be quickly installed includes a first shell 1 and a second shell 2 that are connected to each other. The first shell 1 and the second shell 2 are detachably connected. A screw 5 is axially provided in the first shell 1, and a magnetic ring 6 is provided at one end of the screw 5 located in the second shell 2. A magnetic pole 7 is provided on the end face of the magnetic ring 6 away from the end of the screw 5. A third shell 9 is provided on the outer surface of the second shell 2, and the third shell 9 is radially inserted into the interior of the second shell 2. An induction chip 10 is provided in the third shell 9, and the induction end of the induction chip 10 is opposite to the magnetic pole 7.

[0026] like Figure 2 As shown, in this embodiment, the first shell 1 and the second shell 2 are both cylindrical, and a cylindrical first cavity 101 is formed axially at the center position inside the first shell 1, and a cylindrical second cavity 201 is formed axially at the center position inside the second shell 2, and the fluid flows from the first cavity 101 into the second cavity 201.

[0027] A mounting plane is formed on one side of the second shell 2 for the fitting and fixing of the third shell 9. A mounting hole 8 is provided on the plane. The extended end of the third shell 9 passes through the mounting hole 8 and enters the second cavity 201. A gap is left between the extended end of the third shell 9 and the magnetic ring 6. A cylindrical mounting plate 903 is formed on the top of the fixed end of the third shell 9. The mounting plate 903 fits in the mounting plane. A countersunk hole is provided on the mounting plate 903. A threaded hole corresponding to the countersunk hole is provided on the mounting plane. The countersunk hole and the threaded hole are threadedly connected by screws, thereby achieving the fixation between the third shell 9 and the second shell 2. A protective cover 11 connected to the third shell 9 is also provided above the third shell 9. The protective cover 11 and the mounting plate 903 are detachably connected by screws. A wiring hole is reserved on the top of the protective cover 11 to facilitate the electrical connection of the sensor chip 10 with external devices.

[0028] A third cavity 901 is formed in the third housing 9. Two opposing positioning grooves 902 are formed on the side walls of the third cavity 901. The elongated sensing chip 10 is snapped into the positioning grooves 902 to secure the sensing chip 10. The sensing end of the sensing chip 10 is aligned with the magnetic pole 7. The sensing chip 10 detects the rotation of the magnetic ring 6 and outputs a corresponding pulse signal.

[0029] By providing a positioning groove 902 in the third cavity 901 and connecting the third shell 9 and the second shell 2 with screws, on the one hand, the sensing chip 10 in the third cavity 901 can be accurately positioned to prevent deviation in the installation position of the sensing chip 10, and to ensure that the sensing chip 10 is facing the magnetic pole 7, thereby improving the detection accuracy of the sensing chip 10. On the other hand, when the sensing chip 10 needs to be maintained or replaced in later operation, the sensing chip 10 can be quickly disassembled and installed to ensure that the flow meter is put back into use in a short time.

[0030] In addition, the screw will inevitably wobble during rotation. If the positional relationship between the magnetic poles and the sensing chip in the prior art is adopted, that is, the magnetic poles are distributed on the side of the magnetic ring and the sensing chip is directly opposite the side of the magnetic ring, then the magnetic ring and the magnetic poles will wobble synchronously with the screw, causing the distance between the magnetic poles and the sensing chip to always be in a large range of dynamic changes, thus making it impossible to guarantee detection accuracy. In this embodiment, by placing the magnetic pole 7 on the end face of the magnetic ring 6 and positioning the sensing chip 10 directly opposite the magnetic pole 7, the relative distance between the magnetic pole 7 and the sensing chip 10 remains unchanged. During actual operation, there is only a small deviation in the vertical direction, which can effectively guarantee detection accuracy.

[0031] The first shell 1 and the second shell 2 are detachably connected by screws. During the actual installation process, the parts associated with the first shell 1 and the parts associated with the second shell 2 are first assembled independently with the first shell 1 and the second shell 2 respectively, and then the first shell 1 and the second shell 2 are assembled as a whole. Through modular design, parallel operation and division of labor and cooperation can be achieved, which not only improves assembly efficiency, but also meets diverse needs and enhances the adaptability and flexibility of the product.

[0032] The ends of the screw 5 are rotatably connected to the first support 3 and the second support 4, respectively, via bearings. The first support 3 is located at the inlet end of the first cavity 101, and the second support 4 is located at the outlet end of the first cavity 101. In the prior art, the connection between the first support 3, the second support 4, and the first housing 1 is typically a threaded connection, whereby the first support 3 and the second support 4 are provided with external threads on the sides of the first support 3 and the second support 4, and internal threads are provided at corresponding positions at the ends of the first housing 1. However, during the manufacturing process, machining errors may occur between the internal and external threads, resulting in the first support 3 and the second support 4 not being fully aligned after tightening and installation, affecting the installation of the threads 5 and subsequent normal operation.

[0033] Based on this, in this embodiment, a plurality of first blind holes are opened axially from the outside to the inside at both ends of the first shell 1, and a plurality of second blind holes corresponding to the first blind holes are opened on the inner side surfaces of the first support 3 and the second support 4. The first blind holes and the second blind holes together form a closed latch hole, and the latch holes are distributed on the periphery of the first cavity 101. A positioning pin 12 is provided in the latch hole, and the positioning pin 12 is used to position the first support 3 and the second support 4, and ensure that the two are in a facing state, thereby ensuring the installation accuracy of the screw 5 and preventing the screw 5 from shaking or swinging during subsequent use. In addition, it should be explained in detail that the first support 3 is tightly fixed by the outer second shell 2, and the second support 4 is threadedly connected to the second shell 2 to fix the second support 4.

[0034] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention and are not limiting. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A single screw flow meter that can be quickly installed, characterized in that: The invention comprises a first shell and a second shell which are connected to each other, and a detachable connection is adopted between the first shell. A screw is axially provided in the first shell, and a magnetic ring is provided at one end of the screw located in the second shell. A magnetic pole is provided on the end face of the magnetic ring away from the end of the screw. A third shell is provided on the outer surface of the second shell, and an extended end of the third shell is radially inserted into the interior of the second shell. A gap is left between the extended end of the third shell and the magnetic ring. An induction chip is provided in the third shell, and the induction end of the induction chip is directly opposite to the magnetic pole.

2. The single screw flow meter capable of rapid installation according to claim 1, characterized in that: A cylindrical first cavity is formed axially at the center of the first shell, and a cylindrical second cavity is formed axially at the center of the second shell. The fluid flows from the first cavity into the second cavity.

3. The single screw flow meter capable of rapid installation according to claim 2, characterized in that: A mounting plane is formed on one side of the second shell, and a mounting hole is opened on the mounting plane. A cylindrical mounting plate is formed on the top of the fixed end of the third shell. The mounting plate is fitted with the mounting plane, and a countersunk hole is opened on the mounting plate. A threaded hole corresponding to the countersunk hole is opened on the mounting plane. The above-mentioned countersunk holes and threaded holes are threadedly connected by screws, thereby achieving fixation between the third shell and the second shell.

4. The single-screw flowmeter capable of rapid installation according to claim 3, characterized in that: A third cavity is formed in the third shell, and two opposite positioning grooves are opened on the side walls of the third cavity. The long strip of sensing chip is snapped into the positioning grooves to fix the sensing chip so that the sensing end of the sensing chip is exactly opposite to the magnetic pole.

5. The single screw flow meter capable of rapid installation according to claim 4, characterized in that: A plurality of first blind holes are provided at both ends of the first shell along the axial direction from the outside to the inside, and a plurality of second blind holes corresponding to the first blind holes are provided on the inner side surfaces of the first support and the second support. A closed latch hole is formed by the first blind holes and the second blind holes. The latch holes are distributed on the periphery of the first cavity. A positioning pin is provided in the latch hole. The positioning pin is used to realize the positioning of the first support and the second support and ensure that the two are in a facing state.

6. The single screw flow meter capable of rapid installation according to claim 5, characterized in that: A protective cover connected to the third shell is also provided above the third shell. The protective cover is detachably connected to the mounting plate by screws, and a cable arrangement hole is reserved on the top of the protective cover.

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