Compression-resistant stable rotating elliptical gear flowmeter

Abstract

The embodiment of the utility model provides a pressure-resistant stable rotating elliptical gear flowmeter, and relates to the technical field of flowmeters. The two elliptical gears are meshed with each other to rotate, non-contact scanning is carried out through rotation of the elliptical gears, one pulse is generated in each half circle, the resolution ratio is very high, the elliptical gear transmitter can measure very small flow and quantify small-volume liquid, and the flow precision is high; through the arrangement of the fixing bolts, the threaded holes and the counter bores, the upper cover, the flow shell and the connecting shell can be fixedly installed through threaded connection between the fixing bolts and the threaded holes, and at the moment, the four fixing bolts can achieve the pressurization protection function; the elliptic gear flowmeter not only changes the problem of pressure resistance of a flange connection mode of a traditional elliptic gear flowmeter, but also changes a liquid inlet and outlet mode of the traditional elliptic gear flowmeter, effectively improves the stability of flow velocity measurement and the repeatability of flow metering of the flowmeter, and further improves the precision of the flowmeter.

Description

Technical Field

[0001] The embodiments of the present application relate to the technical field of flowmeters, and in particular to a pressure-resistant and stable rotating elliptical gear flowmeter. Background Art

[0002] A flow meter is an instrument used to measure the flow of fluid in a pipe or open channel. In industrial production and many practical application scenarios, accurate measurement of fluid flow is crucial for process control, resource management, and stable operation of the system.

[0003] Traditional flowmeters use flange connections, which pose a risk to their pressure-bearing capacity and poor pressure resistance when facing complex working conditions, such as medium and high pressure environments. At the same time, traditional elliptical gear flowmeters use left and right side liquid inlet and outlet methods, which easily cause the rotating components to move during operation, thereby affecting the stability of the flow rate measured by the flowmeter and the repeatability of the measured flow rate, and the measurement accuracy is easily affected. In particular, when measuring medium and high pressure small flows, the movement has a greater impact on accuracy. Based on the above reasons, the utility model proposes a pressure-resistant and stable rotating elliptical gear flowmeter. Utility Model Content

[0004] In view of the above problems, an embodiment of the present application provides a pressure-resistant and stable rotating elliptical gear flowmeter to solve the problems of insufficient pressure resistance, stability and accuracy of the elliptical gear flowmeter in the prior art.

[0005] An embodiment of the present application provides a pressure-resistant and stable rotating elliptical gear flowmeter, including a connecting shell, two "L-shaped" symmetrical inner holes are provided on the left and right sides of the connecting shell, a flow shell is installed on the top surface of the connecting shell, a cavity groove is provided in the center of the flow shell, a flow component is provided in the cavity groove, an upper cover is provided on the top surface of the flow shell, a non-through vertical hole is provided on the upper part of the upper cover, the vertical hole is a sensor installation space and is isolated from the cavity groove, and the magnetic resistance switch in the sensor senses the rotation of the flow component in the cavity groove.

[0006] In some embodiments, the flow component includes an elliptical gear, the cavity groove is arranged in a cross shape, and two mutually meshing elliptical gears are arranged in the cavity groove. The center of the elliptical gear rotates around the mounting axis, and the mounting axis is fixedly connected to the bottom of the cavity groove. Two through holes are symmetrically opened in the cavity groove, and the two through holes are respectively concentrically arranged with the upper parts of the two inner holes of the connecting shell.

[0007] In some embodiments, the top surface of the connecting shell is flat, and two "L-shaped" symmetrical inner holes are opened on the left and right sides of the connecting shell. The metered medium enters and exits the cavity groove from the bottom through the through hole through the inner hole, and the top surface of the connecting shell is located at the inner hole with a first sealing ring installed.

[0008] In some embodiments, countersunk holes are evenly distributed on the upper cover, and the lower through holes in the countersunk holes pass through the upper cover and the flow shell in sequence and extend to the top surface of the connecting shell. The top surface of the connecting shell is provided with threaded holes, and the fixing bolts enter from the countersunk holes and are tightened to the threaded holes.

[0009] In some embodiments, a second sealing ring is installed on the top surface of the flow shell, and the cavity groove is located inside the second sealing ring.

[0010] Through the above scheme, the flow meter of the present invention is provided with a flow component, and two elliptical gears are engaged and rotated with each other, and the rotation of the elliptical gears is used for non-contact scanning, and a pulse is generated every half circle. The resolution is very high, and the elliptical gear transmitter can measure very small flow rates, quantify small volumes of liquid, and has high flow accuracy; the utility model is provided with fixing bolts, threaded holes and countersunk holes, and the threaded connection between the fixing bolts and the threaded holes can complete the fixed installation between the upper cover, the flow shell and the connecting shell. At this time, the four fixing bolts can realize the pressurization protection function; the present elliptical gear flow meter not only changes the pressure resistance problem of the flange connection method of the traditional elliptical gear flow meter, but also changes the liquid inlet and outlet method of the traditional elliptical gear flow meter, effectively improving the stability of the flow meter in measuring flow rate and the repeatability of the flow meter, and further improving the accuracy of the flow meter.

[0011] The above description is only an overview of the technical solution of the embodiment of the present application. In order to more clearly understand the technical means of the embodiment of the present application, it can be implemented in accordance with the contents of the specification. In order to make the above and other purposes, features and advantages of the embodiment of the present application more obvious and easy to understand, the specific implementation methods of the present application are listed below. BRIEF DESCRIPTION OF THE DRAWINGS

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present application, a brief introduction will be given below to the drawings required for use in the description of the embodiments. Obviously, the drawings described below are some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without any creative work.

[0013] Figure 1 This is a schematic diagram of the front three-dimensional structure of this application;

[0014] Figure 2 This is a schematic diagram of the internal three-dimensional structure of this application;

[0015] Figure 3 This is a schematic diagram of the three-dimensional structure of the connection housing of the present application;

[0016] Figure 4 This is a schematic diagram of the three-dimensional structure of the flow shell of this application;

[0017] Figure 5 This is a schematic diagram of the three-dimensional structure of the upper cover of this application.

[0018] Description of reference numerals:

[0019] 1. Connecting shell; 2. Inner hole; 3. Flow shell; 4. Cavity groove; 5. Upper cover; 6. Vertical hole; 7. Oval gear; 8. Mounting shaft; 9. Through hole; 10. First sealing ring; 11. Countersunk hole; 12. Fixing bolt; 13. Threaded hole; 14. Second sealing ring. DETAILED DESCRIPTION

[0020] To make the purpose, technical solutions, and advantages of the embodiments of this application more clear, the technical solutions in the embodiments of this application will be clearly and completely described below in conjunction with the accompanying drawings in the embodiments of this application. Obviously, the described embodiments are part of the embodiments of this application, not all of the embodiments. Based on the embodiments in this application, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of this application.

[0021] The terms "including" and "having" and any variations thereof in the specification, claims, and drawings of this application are intended to cover and not exclude other contents. The words "a" or "an" do not exclude the presence of a plurality. Unless otherwise indicated, "plurality" means more than two (including two). Similarly, "multiple groups" means more than two (including two groups).

[0022] The directional words appearing in the following description refer to the directions shown in the drawings and do not limit the specific structure of this application. For example, in the description of this application, the terms "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "inner", "outer", "axial", "radial", "circumferential", etc., which indicate directions or positional relationships, are based on the directions or positional relationships shown in the drawings and are only for the convenience of describing this application and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific direction, be constructed and operate in a specific direction, and therefore should not be understood as limiting this application.

[0023] In addition, the expressions of the indicated directions, such as the height direction, used to illustrate the operation and construction of the various components of this embodiment are not absolute but relative, and although these indications are appropriate when the various components are in the positions shown in the figures, when these positions are changed, these directions should be interpreted differently to correspond to the changes.

[0024] In the description of this application, 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, the "connected" or "connected" of a mechanical structure may refer to a physical connection, such as a fixed connection, a detachable connection, or an integral connection. In addition to referring to a physical connection, the "connected" or "connected" of a circuit structure may also refer to an electrical connection or a signal connection. For example, it may be a direct connection, that is, a physical connection, or it may be an indirect connection through at least one intermediate element, as long as the circuit is connected. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0025] In order to facilitate understanding of the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application are clearly and completely described below in conjunction with the drawings in the embodiments of the present application.

[0026] like Figure 1-5 As shown, the embodiment of the present application provides a pressure-resistant and stable rotating elliptical gear flowmeter, including a connecting shell 1, two inner holes 2 are symmetrically opened in the connecting shell 1, a flow shell 3 is installed on the top surface of the connecting shell 1, a cavity groove 4 is opened in the center of the flow shell 3, a flow component is arranged in the cavity groove 4, and the flow component includes an elliptical gear 7, the cavity groove 4 is arranged in a cross shape, and two mutually meshing elliptical gears 7 are arranged in the cavity groove 4. The elliptical gear 7 rotates around the mounting shaft 8, and the mounting shaft 8 is fixedly connected to the bottom of the cavity groove 4. Two through holes 9 are symmetrically opened in the cavity groove 4, and the two through holes 9 are respectively arranged to be concentrically connected with the upper parts of the two inner holes 2;

[0027] In the technical solution of this embodiment, two elliptical gears 7 are meshed and rotated with each other, and the rotation of the elliptical gears 7 is used for non-contact scanning, generating a pulse every half turn, with very high resolution. The elliptical gear 7 transmitter can measure very small flow rates and quantitatively measure small volumes of liquid with high flow accuracy;

[0028] Furthermore, the top surface of the connecting housing 1 is flat, with two "L-shaped" symmetrical inner holes 2 on the left and right. The metered medium passes through the inner hole 2 from the bottom through the through hole 9 to enter and exit the cavity groove 4, avoiding the movement of the elliptical gear 7 during operation and improving stability. The top surface of the connecting housing 1 is located at the inner hole 2. A first sealing ring 10 is installed, which can effectively improve the sealing performance of the connection between the inner hole 2 and the through hole 9, avoid liquid leakage, and improve accuracy.

[0029] The top surface of the flow housing 3 is provided with an upper cover 5, with a non-through vertical hole 6 defined in its upper portion. This vertical hole 6 provides space for the sensor installation and is isolated from the cavity slot 4. The magnetic resistance switch in the sensor senses the rotation of the flow assembly within the cavity slot 4. Countersunk holes 11 are evenly distributed throughout the upper cover 5, which can also be configured as straight-through holes. The lower through-holes in the countersunk holes 11 sequentially penetrate the upper cover 5 and flow housing 3 and extend to the top surface of the connecting housing 1. Threaded holes 13 are defined on the top surface of the connecting housing 1. Bolts 12 enter through the countersunk holes in the upper cover 5 and are tightened through each through-hole to the threaded hole 13 at the top of the connecting housing 1.

[0030] In the technical solution of this embodiment, the upper cover 5, the flow shell 3 and the connection shell 1 are fixedly installed by the threaded connection between the fixing bolts 12 and the threaded holes 13. At this time, the four fixing bolts 12 can realize the pressure protection function, which not only facilitates the disassembly and maintenance of the flow meter, but also multiple bolts 12 can be provided to further improve the pressure resistance of the flow meter.

[0031] Furthermore, a second sealing ring 14 is fixedly connected to the top surface of the flow shell 3 , and the cavity groove 4 is arranged inside the second sealing ring 14 , which can effectively improve the sealing between the flow shell 3 and the upper cover 5 .

[0032] Those skilled in the art will appreciate that, although some embodiments herein include certain features included in other embodiments but not other features, combinations of features from different embodiments are intended to be within the scope of this application and to form different embodiments. For example, in the claims, any one of the claimed embodiments may be used in any combination.

[0033] As described above, the above embodiments are only used to illustrate the technical solutions of the present application, rather than to limit them. Although the present application has been described in detail with reference to the above embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the above embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the embodiments of the present application.

Claims

1. A pressure-resistant and stable rotating elliptical gear flowmeter, characterized in that: The invention comprises a connecting shell (1), wherein two "L-shaped" symmetrical inner holes (2) are provided on the left and right sides of the connecting shell (1), a flow shell (3) is installed on the top surface of the connecting shell (1), a cavity groove (4) is provided at the center of the flow shell (3), a flow component is provided in the cavity groove (4), an upper cover (5) is provided on the top surface of the flow shell (3), a non-through vertical hole (6) is provided on the top of the upper cover (5), the vertical hole (6) is a sensor installation space and is isolated from the cavity groove (4), and a magnetic resistance switch in the sensor senses the rotation of the flow component in the cavity groove (4).

2. The pressure-resistant and stable rotating elliptical gear flowmeter according to claim 1, characterized in that: The flow assembly includes an elliptical gear (7), the cavity groove (4) is arranged in a cross shape, two mutually meshing elliptical gears (7) are arranged in the cavity groove (4), the elliptical gear (7) rotates around a mounting shaft (8), the mounting shaft (8) is fixedly connected to the bottom of the cavity groove (4), and two through holes (9) are symmetrically provided in the cavity groove (4), and the two through holes (9) are respectively arranged to be concentrically connected to the upper parts of the two inner holes (2).

3. The pressure-resistant and stable rotating elliptical gear flowmeter according to claim 1, characterized in that: The top surface of the connecting shell (1) is arranged in a plane, with two "L-shaped" symmetrical inner holes (2) formed on the left and right sides. The metered medium enters and exits the cavity groove (4) from the bottom through the through hole (9) through the inner hole (2). The top surface of the connecting shell (1) is provided with a first sealing ring (10) at the inner hole (2).

4. The pressure-resistant and stable rotating elliptical gear flowmeter according to claim 1, characterized in that: Countersunk holes (11) are evenly distributed on the upper cover (5), and lower through holes in the countersunk holes (11) sequentially penetrate the upper cover (5), the flow shell (3), and extend to the top surface of the connecting shell (1). The top surface of the connecting shell (1) is provided with threaded holes (13), and fixing bolts (12) enter from the countersunk holes (11) and are screwed together with the threaded holes (13).

5. The pressure-resistant and stable rotating elliptical gear flowmeter according to claim 1, characterized in that: A second sealing ring (14) is installed on the top surface of the flow shell (3), and the cavity groove (4) is located inside the second sealing ring (14).

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