Connector on flow controller and flow controller

Abstract

The utility model discloses a connector on a flow controller and the flow controller, the connector comprises a connecting pipe and a pipe joint, the first end of the connecting pipe is connected with the first end of the pipe joint, so that the connecting pipe is communicated with the pipe joint, and fluid flows in the hollow connecting pipe through the pipe joint; the connecting pipe extends into the pipe joint; the first end of the connecting pipe is provided with an annular protruding part surrounding the first end of the connecting pipe, and the annular protruding part is formed by extruding the inner wall of the connecting pipe through a bead. According to the flow controller, the problems that in the prior art, a pipe connector and a connecting pipe of the flow controller are generally connected through a screw and a nut, installation is relatively tedious, and liquid leakage is likely to happen are solved, and the connector is flexible in installation and has better stability and sealing performance.

Description

Technical Field

[0001] The present application relates to the field of flow meters, and in particular to a joint on a flow controller and a flow controller. Background Art

[0002] A flowmeter (also known as a flow controller) is an instrument that indicates the measured flow rate and / or the total amount of fluid within a selected time interval. Simply put, it is a device used to measure the flow rate of fluid in a pipe or open channel. Flowmeters are categorized into differential pressure flowmeters, rotor flowmeters, throttling flowmeters, slit flowmeters, positive displacement flowmeters, electromagnetic flowmeters, and ultrasonic flowmeters. They are also classified by medium into liquid flowmeters and gas flowmeters.

[0003] Figure 6 This is a connection diagram of a flow meter according to related technology, such as Figure 6 As shown, flow meter B is used to measure liquid flow or gas flow. In the following, liquid is used as an example. The liquid enters the flow meter from a pipe and then flows out of the flow meter from another pipe. Thus, the flow of the liquid can be controlled by flow meter B. The pipe is connected to the flow meter through connector A, which is convenient for disassembly of the flow meter. Figure 6 Two joints A are shown in FIG. 1 , wherein one joint is connected to the pipe entering the flow meter, and the other joint is connected to the pipe flowing out of the flow meter.

[0004] In the related art, the pipe joints and connecting pipes in the flow controller are generally connected by screws and nuts. This connection method is relatively cumbersome to install and may cause leakage. Summary of the Invention

[0005] An embodiment of the present application provides a connector on a flow controller, which at least solves the problem in the related art that the pipe connector and the connecting pipe of the flow controller are generally connected by screws and nuts, which is relatively cumbersome to install and may cause leakage.

[0006] According to one aspect of the present application, a connector on a flow controller is provided, comprising: a connecting tube and a pipe joint, wherein the first end of the connecting tube is connected to the first end of the pipe joint, so that the connecting tube and the pipe joint are in communication, and the fluid flows in the hollow connecting tube through the pipe joint; the connecting tube extends into the interior of the pipe joint; the first end of the connecting tube is provided with an annular protrusion surrounding the first end of the connecting tube, and the annular protrusion is formed by squeezing the inner wall of the connecting tube by inserting a bead.

[0007] Optionally, the joint further includes: a compression nut, wherein, after the connecting pipe and the pipe joint are connected, the compression nut is sleeved on the periphery of the connection between the pipe joint and the connecting pipe, applying pressure inward to the connection between the connecting pipe and the pipe joint.

[0008] Optionally, a base plate is provided on the first end of the clamping nut, and a hole adapted to the diameter of the connecting pipe is provided on the base plate, and the connecting pipe passes through the clamping nut through the hole and is connected to the pipe joint; a thread is provided from the second end of the clamping nut to the inside of the base plate, and the thread of the clamping nut cooperates with the thread provided on the outer wall of the pipe joint.

[0009] Optionally, after the compression nut is tightened, the inner wall of the hole contacts the annular protrusion to apply pressure to the connection between the connecting pipe and the pipe joint.

[0010] Optionally, the compression nut cooperates with the external thread of the pipe joint and is pressed downward to deform the annular protrusion that is inverted at the bead insertion point and fits with the pipe joint.

[0011] Optionally, the internal thread of the compression nut cooperates with the external thread of the pipe joint to apply pressure to the sealing element in the pipe joint, so that the pipe wall and the bead entry bevel are sealed.

[0012] Optionally, the internal thread of the compression nut cooperates with the external thread of the pipe joint to apply pressure to the internal inclined surface feature of the pipe joint, so that the inclined surface of the pipe joint is pressed against the pipe wall and the bead to form an undercut feature when under pressure.

[0013] Optionally, some or all of the components of the joint are made of PFA material.

[0014] According to another aspect of the present application, a flow controller is also provided, characterized in that the flow controller uses the above-mentioned connector.

[0015] Optionally, the flow controller is an ultrasonic flow controller.

[0016] In the embodiment of the present application, the connector used includes: a connecting pipe and a pipe joint, wherein the first end of the connecting pipe is connected to the first end of the pipe joint, so that the connecting pipe and the pipe joint are in communication, and the fluid flows in the hollow connecting pipe through the pipe joint; the connecting pipe extends into the interior of the pipe joint; the first end of the connecting pipe is provided with an annular protrusion surrounding the first end of the connecting pipe, and the annular protrusion is formed by squeezing the inner wall of the connecting pipe with a bead. This application solves the problem in the related art that the pipe joint and the connecting pipe of the flow controller are generally connected by screws and nuts, which is relatively cumbersome to install and may leak. This connector is flexible to install and has better stability and sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The drawings that form part of this application are intended to provide a further understanding of this application. The illustrative embodiments and descriptions of this application are intended to explain this application and do not constitute an improper limitation on this application. In the drawings:

[0018] Figure 1 is a cross-sectional view of a connector on a flow controller according to an embodiment of the present application;

[0019] Figure 2 According to the embodiment of this application Figure 1 Schematic diagram of detail 1;

[0020] Figure 3 According to the embodiment of this application Figure 1 Schematic diagram of detail 2;

[0021] Figure 4 According to the embodiment of this application Figure 1 Schematic diagram of detail 3;

[0022] Figure 5 is a perspective view of a connector on a flow controller according to an embodiment of the present application;

[0023] Figure 6 1 is a connection diagram of a flow meter according to the related art. DETAILED DESCRIPTION

[0024] It should be noted that, in the absence of conflict, the embodiments and features of the embodiments in this application can be combined with each other. The present application will be described in detail below with reference to the accompanying drawings and in combination with the embodiments.

[0025] Figure 5 is a perspective view of a connector on a flow controller according to an embodiment of the present application, as shown in FIG. Figure 5As shown, the connector on the flow controller includes two major parts, namely a connecting pipe and a pipe joint, wherein the first end of the connecting pipe is connected to the first end of the pipe joint, so that the connecting pipe and the pipe joint are connected, and the flow flows in the hollow connecting pipe through the connector. Figure 1 is a cross-sectional view of a connector on a flow controller according to an embodiment of the present application, as shown in FIG. Figure 1 As shown, the first end of the connecting tube 4 is provided with an annular protrusion surrounding the first end of the connecting tube 4 , and the annular protrusion is formed by squeezing the inner wall of the connecting tube 4 through the bead 3 .

[0026] That is Figure 1 The joint shown includes: a connecting pipe 4 and a pipe joint 1, wherein the first end of the connecting pipe 4 is connected to the first end of the pipe joint 1, so that the connecting pipe 4 and the pipe joint 1 are in communication, and the fluid flows in the hollow connecting pipe 4 through the pipe joint 1; the connecting pipe 4 extends into the interior of the pipe joint 1; the first end of the connecting pipe 4 is provided with an annular protrusion surrounding the first end of the connecting pipe 4, and the annular protrusion is formed by squeezing the inner wall of the connecting pipe 4 with the bead 3.

[0027] The above-mentioned joint solves the problem that the pipe joint 1 and the connecting pipe 4 of the flow controller in the related art are generally connected by screws and nuts. This connection method is relatively cumbersome to install and there is a possibility of leakage. This joint is flexible to install and has better stability and sealing.

[0028] Optionally, the joint further includes: a clamping nut 2, wherein, after the connecting pipe 4 and the pipe joint 1 are connected, the clamping nut 2 is sleeved on the periphery of the connection between the pipe joint 1 and the connecting pipe 4, applying pressure inward to the connection between the connecting pipe 4 and the pipe joint 1.

[0029] Optionally, a base plate is provided on the first end of the clamping nut 2, and a hole adapted to the diameter of the connecting pipe 4 is provided on the base plate, and the connecting pipe 4 passes through the clamping nut 2 through the hole and is connected to the pipe joint 1; a thread is provided from the second end of the clamping nut 2 to the inside of the base plate, and the thread of the clamping nut 2 cooperates with the thread provided on the outer wall of the pipe joint 1.

[0030] Optionally, after the compression nut 2 is tightened, the inner wall of the hole contacts the annular protrusion to apply pressure to the connection between the connecting pipe 4 and the pipe joint 1 .

[0031] exist Figure 1 After being tightened by the compression nut, three details are formed. Each of these three details can achieve a better sealing effect. These three details are explained below.

[0032] Detail I: The clamping nut 2 cooperates with the external thread of the pipe joint 1 and is pressed downward to deform the annular protrusion at the bead 3 and fit the pipe joint 1. Figure 2 According to the embodiment of this application Figure 1 The schematic diagram of detail 1 is as follows: Figure 2 As shown, detail I is the first sealing part. The compression nut cooperates with the external thread of the pipe joint and presses downward, causing the inverted flange feature at the bead to deform and fit tightly with the pipe joint. At the same time, the internal liquid pressure pushes the flange (i.e., the annular protrusion) outward, making the seal between the bead and the pipe joint more strict.

[0033] Detail II: The internal thread of the compression nut 2 cooperates with the external thread of the pipe joint 1, applying pressure to the sealing element in the pipe joint 1, so that the pipe wall and the inclined surface of the bead 3 are sealed. Figure 3 According to the embodiment of this application Figure 1 The schematic diagram of detail 2 is as follows: Figure 3 As shown, detail II is the second sealing part. The internal thread of the compression nut cooperates with the external thread of the pipe joint, applying pressure to the sealing element in the pipe joint to seal the pipe wall and the bead bevel, ensuring a tight and leak-free pipeline connection.

[0034] Detail III: The internal thread of the clamping nut 2 cooperates with the external thread of the pipe joint 1, applying pressure to the internal inclined surface feature of the pipe joint 1, so that the inclined surface of the pipe joint 1 is pressed against the pipe wall and the bead 3 to form an undercut feature when under pressure. Figure 4 According to the embodiment of this application Figure 1 The schematic diagram of detail 3 is as follows: Figure 3 As shown, detail III is the third sealing part. The compression nut cooperates with the external thread of the pipe joint to apply pressure to the inclined surface feature inside the pipe joint, so that the inclined surface feature of the pipe joint is pressed against the pipe wall and the bead when under pressure, and at the same time forms an undercut feature, which enhances the tightness of the sealing interface and greatly reduces the risk of loosening.

[0035] In the above embodiment, a connector is provided. The connector is a detachable connector in the fluid pathway, including a pipe joint, a compression nut, a connecting pipe, an insert bead and other components. The connector is assembled around the plastic housing of the flow controller. Some or all of the components in the connector can be made of PFA material, which has low density, light weight, corrosion resistance, acid and alkali resistance, moisture resistance, easy disassembly, and good sealing performance.

[0036] PFA material is a copolymer of a small amount of perfluoropropyl perfluorovinyl ether and polytetrafluoroethylene. PFA material has excellent chemical corrosion resistance and is resistant to all chemicals. It has the lowest friction coefficient among plastics and has good electrical properties. Its electrical insulation is not affected by temperature. PFA material is suitable for making corrosion-resistant parts, wear-resistant parts, seals, insulating parts and medical device parts.

[0037] The above embodiment utilizes a beaded connector, comprising a pipe joint, a compression nut, a beaded connector, and a connecting tube. The beaded connector serves as the connecting component between the flow controller and the piping system, ensuring a smooth connection with the pipeline and enabling fluid transport. This connector, assembled around the flow controller's housing, is precision-machined from PFA material and boasts excellent corrosion, high-temperature, and seismic resistance. It also offers excellent flexibility, stability, and sealing.

[0038] In this embodiment, a flow meter (ie, a flow controller) may also be provided, which uses the above-mentioned connector to connect a connector through which fluid enters the flow meter, and / or uses the above-mentioned connector to connect a connector through which fluid flows out of the flow meter.

[0039] The flowmeter can be an ultrasonic flowmeter, in which PFA is a more suitable material for the connector. The ultrasonic flowmeter can include: a housing, wherein the housing space is divided into two parts; a valve assembly for controlling the flow of liquid into the ultrasonic flowmeter; a flow measurement assembly for measuring the flow rate of the liquid passing through the flow measurement assembly using ultrasound, wherein the valve assembly is connected to the flow assembly, and the valve assembly and the flow assembly are located in the first of the two parts; and a circuit board for controlling the valve assembly and the flow measurement assembly, wherein the circuit board is located in the second of the two parts.

[0040] The above-mentioned valve assembly may include: a stepper motor, a rotating shaft, a slider nut, an adapter nut and a diaphragm, wherein the stepper motor drives the rotating shaft to perform rotational motion under control, the slider nut is coupled to the rotating shaft, and the slider nut performs linear motion on the axis of the rotating shaft driven by the rotating shaft; the first end of the adapter nut is connected to the slider nut, and the second end of the adapter nut is connected to the diaphragm, and the slider nut drives the diaphragm to perform linear motion through the adapter nut, and the linear motion of the diaphragm is used to control the flow rate.

[0041] Optionally, the slider nut includes: a first cylinder and a second cylinder, wherein the second cylinder and the first cylinder are coaxially arranged, the diameter of the first cylinder is larger than that of the second cylinder, the central axis of the slider nut is hollow, the diameter of the hollow part is adapted to the rotating axis, and the second cylinder is used to connect with the adapter nut.

[0042] Optionally, the valve assembly may further include: a retaining frame, which is adapted to the shape of the stepper motor and is sleeved on the stepper motor; at least two equidistant notches are also provided on the first cylinder of the slider nut, and the number of limiting columns is the same as the number of the notches. The limiting columns pass through the notches to install the slider nut on the retaining frame, and the slider nut can move linearly along the axis of the limiting columns. The limiting columns are used to limit the rotation of the slider nut.

[0043] Optionally, there are three notches on the first cylinder of the slider nut, and the slider nut is mounted on the retaining frame through three limiting columns; the retaining frame is fixed to the stepping motor through fixing screws.

[0044] Optionally, the valve assembly may further include: a valve cover and a spring, wherein one end of the spring contacts the adapter nut, and the other end of the spring contacts the valve cover, and when the adapter nut moves toward the valve cover, the spring is compressed; the valve cover is fixed to the retaining frame by a fixing screw, and there is a certain distance between the retaining frame and the valve cover.

[0045] Optionally, the valve assembly may further include: a valve sealing shell and a valve sealing ring, wherein the valve sealing shell is used to place the following components: the stepper motor, the retaining frame, the slider nut, the adapter nut, the spring and the valve cover; the valve sealing ring is fixed to the valve sealing shell by fixing screws.

[0046] Optionally, the valve assembly may further include: a valve end cover, the valve end cover being fixed to the valve sealing shell by fixing screws; a gap at the center of the valve end cover that matches the shape of the diaphragm, and the diaphragm can be placed in the gap.

[0047] Optionally, the adapter nut includes two cylinders, one of which has a larger diameter than the other, and the central axes of the two cylinders included in the adapter nut are the same. The cylinder with a larger diameter is used to connect the slider nut, and the cylinder with a smaller diameter is used to connect the diaphragm.

[0048] For the ultrasonic flow meter, the ultrasonic flow meter may further include: a plurality of mounting posts, one end of each mounting post being fixed to the shell, the mounting post being located in the first part, the other end of each mounting post being used to fix the circuit board, the circuit board and one side of the shell constituting the first part, and the part where the circuit board is located being the second part.

[0049] Optionally, the valve assembly is disposed on one side of the first portion, and the flow measurement assembly is disposed on the other side of the first portion. In another embodiment, the ultrasonic flowmeter may further include an inlet pipe and an outlet pipe, wherein the inlet pipe is connected to the valve assembly, and the outlet pipe is connected to the flow measurement assembly. The inlet and outlet pipes can then be connected to the external fluid channel using the aforementioned connector.

[0050] The above are merely embodiments of the present application and are not intended to limit the present application. For those skilled in the art, the present application may have various changes and variations. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present application should all be included within the scope of the claims of the present application.

Claims

1. A connector on a flow controller, characterized in that: include: Connecting pipes and pipe fittings, wherein The first end of the connecting pipe is connected to the first end of the pipe joint, so that the connecting pipe and the pipe joint are in communication, and the fluid flows in the hollow connecting pipe through the pipe joint; the connecting pipe extends into the interior of the pipe joint; The first end of the connecting pipe is provided with an annular protrusion surrounding the first end of the connecting pipe, and the annular protrusion is formed by pressing the inner wall of the connecting pipe with a bead.

2. The connector on the flow controller according to claim 1, characterized in that: The joint further comprises a compression nut, wherein: After the connecting pipe and the pipe joint are connected, the compression nut is sleeved on the periphery of the connection between the pipe joint and the connecting pipe to apply pressure inward to the connection between the connecting pipe and the pipe joint.

3. The connector on the flow controller according to claim 2, characterized in that: A base plate is provided on the first end of the compression nut, and a hole is provided on the base plate that is adapted to the diameter of the connecting pipe. The connecting pipe passes through the compression nut through the hole and is connected to the pipe joint; a thread is provided from the second end of the compression nut to the inside of the base plate, and the thread of the compression nut cooperates with the thread provided on the outer wall of the pipe joint.

4. The connector on the flow controller according to claim 3, characterized in that: After the compression nut is tightened, the inner wall of the hole contacts the annular protrusion to apply pressure to the connection between the connecting pipe and the pipe joint.

5. The connector on the flow controller according to claim 4, characterized in that: The compression nut cooperates with the external thread of the pipe joint and is pressed downward to deform the annular protrusion that is inverted at the bead insertion point and fits the pipe joint.

6. The connector on the flow controller according to claim 4, characterized in that: The internal thread of the compression nut cooperates with the external thread of the pipe joint to apply pressure to the sealing element in the pipe joint, so that the pipe wall and the bead bevel are sealed.

7. The connector on the flow controller according to claim 4, characterized in that: The internal thread of the compression nut cooperates with the external thread of the pipe joint to apply pressure to the internal inclined surface feature of the pipe joint, so that the inclined surface of the pipe joint is pressed against the pipe wall and the bead to form an undercut feature when under pressure.

8. The connector on the flow controller according to any one of claims 1 to 7, characterized in that: Part or all of the components of the joint are made of PFA material.

9. A flow controller, characterized in that: The flow controller uses the connector according to any one of claims 1 to 8.

10. The flow controller according to claim 9, characterized in that: The flow controller is an ultrasonic flow controller.

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