Constant flow output device

Abstract

The utility model relates to the field of flow metering, in particular to a constant flow output device, which is characterized by comprising a flow meter, a constant flow valve, a flow sensor and a control module, a needle valve is arranged at the upper end of the flow meter, the constant flow valve is arranged on the side surface of the flow meter, and the constant flow valve is used for controlling the output flow; the air inlet pipe is connected to the lower end of the flow meter, the air inlet pipe is perpendicular to the flow meter, and a connecting hole is further formed in the side face of the air inlet pipe; one end of the first connecting pipe is connected to the air inlet pipe and connected with the connecting hole in the air inlet pipe, and the other end of the first connecting pipe is connected to the constant flow valve; the air outlet pipe is arranged at one end of the constant flow valve; the second connecting pipe is arranged on the flowmeter, one end of the second connecting pipe is connected to the upper end of the flowmeter and communicated with the needle valve, and the other end of the second connecting pipe is connected to the other end of the constant flow valve. The problem that flow output of the rotor flow meter is unstable is solved, and the effect of ensuring constant flow output of the rotor flow meter is achieved.

Description

Technical Field

[0001] The present application relates to the field of flow measurement, and in particular to a constant flow output device. Background Art

[0002] A rotor flowmeter is a device used to measure the flow of liquids. Its core working principle is based on a rotating rotor, which is installed in a pipe. When the liquid passes through the pipe, the rotor is pushed by the liquid to rotate. The speed of the rotor is proportional to the fluid flow. The sensor monitors the speed of the rotor rotation, transmits this information to the circuit board for processing, and presents real-time flow data on the display, allowing operators to monitor and control the flow of fluids.

[0003] However, rotor flowmeters may face the problem of unstable output in some cases. This instability may be caused by a variety of factors. The viscosity and temperature changes of the liquid may affect the driving force of the fluid on the rotor, causing the rotor to rotate unsteadily. Secondly, particles or bubbles that may exist in the fluid may also interfere with the rotational motion of the rotor, which will produce fluctuating flow output.

[0004] Therefore, we need a constant flow output device that can solve the problem of unstable flow output of the rotor flowmeter. Utility Model Content

[0005] The purpose of the present application is to provide a constant flow output device that can solve the problem of unstable flow output of a rotor flowmeter.

[0006] To achieve the above-mentioned purpose, the embodiment of the present application adopts the following technical scheme: a constant flow output device, comprising: a flow meter, the upper end of the flow meter is a needle valve, a dial is provided on the surface of the flow meter, a magnetic coupling part is also provided on the dial, one end of the magnetic coupling part is a pointer, the pointer is bent, and the pointer can rotate; a constant flow valve, the constant flow valve is arranged on the side of the flow meter, and the constant flow valve is used to control the output flow; an air inlet pipe, the air inlet pipe is connected to the lower end of the flow meter, the air inlet pipe and the flow meter are arranged vertically, and a connecting hole is also provided on the side of the air inlet pipe, and the air inlet pipe is used to input flow; connecting pipe one, one end of the connecting pipe one is connected to the air inlet pipe and connected to the connecting hole on the air inlet pipe, and the other end of the connecting pipe one is connected to the constant flow valve; an air outlet pipe, the air outlet pipe is arranged at one end of the constant flow valve, and the air outlet pipe is used to output flow; a connecting pipe two, the connecting pipe two is arranged on the flow meter, one end of the connecting pipe two is connected to the needle valve at the upper end of the flow meter, and the other end of the connecting pipe two is connected to the other end of the constant flow valve.

[0007] In the above technical scheme, the embodiment of the present application connects a constant flow valve at the outlet end of the rotor flowmeter and connects them through a connecting pipe. When the outlet pressure of the rotor flowmeter changes, the constant flow valve is automatically adjusted by a built-in diaphragm constant flow valve to maintain the differential pressure before and after the needle valve at a constant value, thereby ensuring the output of the constant flow of the rotor flowmeter. The constant flow valve design must meet the output flow of the rotor flowmeter. The rotor flowmeter will vary in size according to the flow range, and the structure of the constant flow valve will also change, and the parameters such as the cavity, valve core and spring of the constant flow valve will be changed. The problem of unstable flow output of the rotor flowmeter is solved, and the effect of ensuring the output of the rotor flowmeter constant flow is achieved.

[0008] Further, according to an embodiment of the present application, the needle valve is a 90-degree needle valve.

[0009] Further, according to an embodiment of the present application, the constant flow valve further includes:

[0010] The lower body, the right side of the lower body is connected to the connecting pipe 2, and the left side is connected to the air outlet pipe;

[0011] The upper body has a through hole at the bottom thereof, and the through hole is connected to a connecting pipe;

[0012] A stud bolt group is arranged between the lower body and the upper body, and is used to connect the lower body and the upper body.

[0013] Further, according to an embodiment of the present application, the constant flow valve is divided into three chambers.

[0014] Further, according to an embodiment of the present application, the chambers are two left and right chambers and a separate chamber below them.

[0015] Further, according to an embodiment of the present application, the chamber below the constant flow valve is separated from the left and right chambers.

[0016] Further, according to an embodiment of the present application, the connecting pipe 1 is connected to the chamber below the constant flow valve.

[0017] Further, according to an embodiment of the present application, connecting pipe 2 is connected to the left chamber of the constant flow valve.

[0018] Further, according to an embodiment of the present application, the air inlet pipe is inserted into the flow meter and connected to the input end through a flange.

[0019] Further, according to an embodiment of the present application, the air outlet pipe is connected to the right chamber of the constant flow valve, and is connected to the output end through a flange.

[0020] Compared with the prior art, the present application has the following beneficial effects: the present application adopts a constant flow output device, by connecting a constant flow valve at the outlet end of the rotor flowmeter and connecting through a connecting pipe, when the outlet pressure of the rotor flowmeter changes through the constant flow valve, it is automatically adjusted through the built-in diaphragm type constant flow valve to maintain the differential pressure before and after the needle valve at a constant value, thereby ensuring the output of the constant flow of the rotor flowmeter. The constant flow valve design must meet the output flow of the rotor flowmeter. The rotor flowmeter will change in size according to the different flow ranges, and the structure of the constant flow valve will also change, and the parameters such as the cavity, valve core and spring of the constant flow valve will be changed. The problem of unstable flow output of the rotor flowmeter is solved, and the effect of ensuring the output of the rotor flowmeter constant flow is achieved. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] The present application is further described below in conjunction with the accompanying drawings and embodiments.

[0022] Figure 1 It is a principle diagram of a constant flow output device according to an embodiment.

[0023] Figure 2 It is a structural schematic diagram of a constant flow output device according to an embodiment.

[0024] Figure 3 Schematic diagram of the structure of the constant flow valve of the embodiment.

[0025] Figure 4 Schematic diagram of the structure of the constant flow valve diaphragm of the embodiment.

[0026] In the attached figure

[0027] 1. Flow meter 11. Needle valve 12. Dial

[0028] 13. Magnetic coupling 2. Constant flow valve 21. Lower body

[0029] 22. Upper body 23. Stud bolt group 24. Valve core

[0030] 25. Spring 26. Sealing ring 27. Diaphragm

[0031] 28. Press the upper plate 29. Press the lower plate 3. Intake pipe

[0032] 4. Connecting pipe 1 5. Exhaust pipe 6. Connecting pipe 2 DETAILED DESCRIPTION

[0033] In order to make the purpose and technical solution of the utility model clearly and completely described, and the advantages more clearly understood, the embodiments of the utility model are further described in detail in conjunction with the accompanying drawings. It should be understood that the specific embodiments described here are part of the embodiments of the utility model, not all of the embodiments, and are only used to explain the embodiments of the utility model, and are not used to limit the embodiments of the utility model. All other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0034] In the description of the present utility model, it should be noted that the terms "center", "middle", "upper", "lower", "left", "right", "inner", "outer", "top", "bottom", "side", "vertical", "horizontal" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "one", "first", "second", "third", "fourth", "fifth", "sixth" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] For the purpose of simplicity and illustration, the principles of the embodiments are mainly described by reference to examples. In the following description, many specific details are proposed to provide a thorough understanding of the embodiments. However, it is obvious that for those of ordinary skill in the art, these embodiments may not be limited to these specific details in practice. In some instances, known methods and structures are not described in detail to avoid making these embodiments unnecessarily difficult to understand. In addition, all embodiments can be used in combination with each other.

[0037] Embodiment 1:

[0038] like Figure 1-4As shown, the present application discloses a constant flow output device, which is characterized by comprising: a flow meter 1, the upper end of the flow meter 1 is a needle valve 11, the surface of the flow meter 1 is provided with a dial 12, the dial 12 is also provided with a magnetic coupling 13, one end of the magnetic coupling 13 is a pointer, the pointer is bent and can rotate; a constant flow valve 2, the constant flow valve 2 is arranged on the side of the flow meter 1, and the constant flow valve 2 is used to control the output flow; an air inlet pipe 3, the air inlet pipe 3 is connected to the lower end of the flow meter 1, the air inlet pipe 3 and the flow meter 1 are arranged vertically, and the air inlet pipe 3 is connected to the lower end of the flow meter 1. A connecting hole is also provided on the side of the air pipe 3, and the air inlet pipe 3 is used to input flow; a connecting pipe 4, one end of the connecting pipe 4 is connected to the air inlet pipe 3, and is connected to the connecting hole on the air inlet pipe 3, and the other end of the connecting pipe 4 is connected to the constant flow valve 2; an outlet pipe 5, the outlet pipe 5 is arranged at one end of the constant flow valve 2, and the outlet pipe 5 is used to output flow; a connecting pipe 2 6, the connecting pipe 2 6 is arranged on the flow meter 1, one end of the connecting pipe 2 6 is connected to the needle valve 11 at the upper end of the flow meter 1, and the other end of the connecting pipe 2 6 is connected to the other end of the constant flow valve 2.

[0039] Specifically, the needle valve 11 is a 90-degree needle valve.

[0040] Specifically, the constant flow valve 2 also includes: a lower body 21, the right side of the lower body 21 is connected to the connecting pipe 2 6, and the left side is connected to the exhaust pipe 5; an upper body 22, a through hole is provided below the upper body 22, and the through hole is connected to the connecting pipe 1 4; a stud bolt group 23, the stud bolt group 23 is provided between the lower body 21 and the upper body 22, and the stud bolt group 23 is used to connect the lower body 21 and the upper body 22.

[0041] Specifically, the constant flow valve 2 is divided into three chambers. The chambers are respectively two left and right chambers and a separate chamber below them. The chamber below the constant flow valve 2 is separated from the left and right chambers. The connecting pipe 1 4 is connected to the chamber below the constant flow valve 2. The connecting pipe 2 6 is connected to the left chamber of the constant flow valve 2.

[0042] Specifically, the air inlet pipe 3 is inserted into the flow meter 1 and connected to the input end through a flange. The air outlet pipe 5 is connected to the right chamber of the constant flow valve 2 and connected to the output end through a flange.

[0043] Specifically, the constant flow valve 2 also includes: a valve core 24, a spring 25, a sealing ring 26 and a diaphragm 27. The diaphragm 27 is arranged between the upper body 22 and the lower body 21 of the constant flow valve 2, and there is a circular hole between the diaphragm 27, and the circular hole is used to place the valve core 24. The valve core 24 is arranged in the diaphragm 27, and its lower end has a thread and is arranged below the diaphragm 27. The valve core 24 is fixed by a nut. The top of the valve core 24 is conical, which can clamp the entrance of the right chamber of the constant flow valve 2, control the size of the connection between the left and right chambers, and thus limit the flow into the right chamber. The sealing ring 26 is arranged on the valve core 24, and there are two sealing rings 26, which are respectively arranged on both sides of the diaphragm 27. The sealing ring 26 strengthens the sealing between the valve core 24 and the diaphragm 27, thereby further separating the lower chamber from the left and right chambers. The spring 25 is arranged at the upper end of the valve core 24, at the connection between the left and right chambers. When the flow rate decreases, the valve core 24 is automatically restored to its original position by the spring 25, so that it can automatically adjust when the outlet pressure changes, and maintain the differential pressure before and after the needle valve at a constant value. The valve core 24 is also provided with a clamping upper plate 28 and a clamping lower plate 29, which are arranged on both sides of the diaphragm 27, respectively, and the diaphragm 27 and the valve core 24 are clamped by them to enhance the sealing performance. The problem of unstable flow output of the rotor flowmeter 1 is solved, and the effect of ensuring the output of the rotor flowmeter 1 at a constant flow rate is achieved.

[0044] Specifically, Figure 1 Where P1 is the pressure in the lower chamber of the constant flow valve 2; P2 is the pressure in the upper chamber of the constant flow valve 2; P3 is the outlet pressure of the constant flow valve 2; F is the elastic force of the spring 25; A is the cross-sectional area of ​​the elastic diaphragm 27; ΔP is the pressure difference before and after the needle valve. Thus, the calculation formula of ΔP=P1-P2=F / A can be obtained. The problem of unstable flow output of the rotor flowmeter 1 is solved, and the effect of ensuring the output of the rotor flowmeter 1 with a constant flow is achieved.

[0045] Specifically, the present application connects a constant flow valve 2 to the outlet end of the rotor flowmeter 1 and connects them through a connecting pipe. When the outlet pressure of the rotor flowmeter 1 changes, the constant flow valve 2 with a built-in diaphragm type automatically adjusts it to maintain the differential pressure before and after the needle valve at a constant value, thereby ensuring the output of the constant flow of the rotor flowmeter 1. The design of the constant flow valve 2 must meet the output flow of the rotor flowmeter 1. The size of the rotor flowmeter 1 will change according to the flow range, and the structure of the constant flow valve 2 will also change, and the parameters such as the cavity, valve core 24 and spring 25 of the constant flow valve 2 will be changed. The problem of unstable flow output of the rotor flowmeter 1 is solved, and the effect of ensuring the output of the constant flow of the rotor flowmeter 1 is achieved.

[0046] Although the above describes the illustrative specific implementation methods of the present application so that technicians in this technical field can understand the present application, the present application is not limited to the scope of the specific implementation methods. For ordinary technicians in this technical field, as long as various changes are within the spirit and scope of the present application defined and determined by the attached claims, all application creations using the concept of the present application are protected.

Claims

1. A constant flow output device, characterized in that: include: A flow meter, wherein the upper end of the flow meter is a needle valve, a dial is provided on the surface of the flow meter, a magnetic coupling piece is also provided on the dial, one end of the magnetic coupling piece is a pointer, the pointer is bent and can rotate; A constant flow valve, the constant flow valve is arranged on the side of the flow meter, and the constant flow valve is used to control the output flow; An air inlet pipe, the air inlet pipe is connected to the lower end of the flow meter, the air inlet pipe and the flow meter are vertically arranged, a connecting hole is also arranged on the side of the air inlet pipe, and the air inlet pipe is used to input flow; A connecting pipe 1, one end of which is connected to the air inlet pipe and connected to a connecting hole on the air inlet pipe, and the other end of which is connected to the constant flow valve; An air outlet pipe, the air outlet pipe is arranged at one end of the constant flow valve, and the air outlet pipe is used to output flow; Connecting pipe 2, the connecting pipe 2 is arranged on the flow meter, one end of the connecting pipe 2 is connected to the upper end of the flow meter and connected to the needle valve, and the other end of the connecting pipe 2 is connected to the other end of the constant flow valve.

2. A constant flow output device according to claim 1, characterized in that: The needle valve is a 90-degree needle valve.

3. A constant flow output device according to claim 1, characterized in that: The constant flow valve also includes: A lower body, wherein the right side of the lower body is connected to the second connecting pipe, and the left side of the lower body is connected to the air outlet pipe; An upper body, wherein a through hole is provided below the upper body, and the through hole is connected to the connecting pipe; A stud bolt group is arranged between the lower body and the upper body, and is used to connect the lower body and the upper body.

4. A constant flow output device according to claim 3, characterized in that: The constant flow valve is divided into three chambers.

5. A constant flow output device according to claim 4, characterized in that: The chambers are respectively two left and right chambers and a separate chamber below them.

6. A constant flow output device according to claim 5, characterized in that: The chamber below the constant flow valve is separated from the left and right chambers.

7. A constant flow output device according to claim 5, characterized in that: The connecting pipe 1 is connected to the chamber below the constant flow valve.

8. A constant flow output device according to claim 5, characterized in that: The second connecting pipe is connected to the left chamber of the constant flow valve.

9. A constant flow output device according to claim 1, characterized in that: The air inlet pipe is inserted into the flow meter and connected to the input end via a flange.

10. A constant flow output device according to claim 1, characterized in that: The air outlet pipe is connected to the right chamber of the constant flow valve and is connected to the output end through a flange.

Images