Single-cylinder flow metering equipment

Abstract

The utility model discloses single-cylinder flow metering equipment, which comprises a valve cylinder, a valve rod, a first valve rod, a second valve rod, a first valve rod, a second valve rod, a first valve rod, a second valve rod, a second valve rod, a first valve rod and a second valve rod, wherein the valve rod is provided with a valve cavity and a first inlet, a second inlet and an outlet; the piston is movably arranged in the valve cavity; the pressure sensor is arranged at the outlet and used for detecting the pressure of the fluid flowing out of the outlet; the single-cylinder flow metering device can solve the problem that a traditional single-cylinder flow metering device has a fluid output neutral position period, and the output efficiency of fluid is affected.

Description

Technical Field

[0001] This utility model relates to the field of metering equipment, specifically to a single-cylinder flow metering device. Background Technology

[0002] Flow metering equipment plays an important role in industries, agriculture, scientific research, and environmental protection. Traditional single-cylinder flow metering equipment generally has only one inlet and one outlet. When the piston moves unidirectionally in the cylinder, there is a certain gap in the fluid output, resulting in discontinuous flow and affecting the fluid output efficiency. Flow metering equipment with multiple cylinders or complex valve groups will increase the size of the equipment and maintenance costs.

[0003] In view of this, this application proposes a single-cylinder flow metering device capable of continuously outputting fluid. Utility Model Content

[0004] To overcome the above-mentioned shortcomings, the purpose of this utility model is to provide a single-cylinder flow metering device.

[0005] To achieve the above objectives, the technical solution adopted by this utility model includes: a valve cylinder having a valve cavity and a first inlet, a second inlet, and an outlet communicating with the valve cavity, the outlet being located between the first inlet and the second inlet; a piston movably disposed within the valve cavity; and a pressure sensor disposed at the outlet for detecting the pressure of the fluid flowing out through the outlet.

[0006] In the preferred embodiment of the above-mentioned single-cylinder flow metering device, the first inlet and the second inlet are located on the same side of the valve cylinder, and the outlet is located on the side of the valve cylinder away from the first inlet and the second inlet.

[0007] In the preferred embodiment of the above-mentioned single-cylinder flow metering device, the piston is controlled by a drive structure to move within the valve chamber.

[0008] In the preferred technical solution of the above-mentioned single-cylinder flow metering device, the drive structure includes a stepper motor, a lead screw located at the rotating shaft end of the stepper motor, and a slide table located at the top of the piston, wherein the slide table is threadedly connected to the lead screw.

[0009] In the preferred technical solution of the above-mentioned single-cylinder flow metering device, the driving structure is a telescopic cylinder, and the shaft end of the telescopic cylinder is connected to the top surface of the piston.

[0010] In the preferred technical solution of the above-mentioned single-cylinder flow metering device, both the first inlet and the second inlet are equipped with flow valves or on / off valves.

[0011] In the preferred technical solution of the above-mentioned single-cylinder flow metering device, the valve cavity, the first inlet, the second inlet and the outlet are coated with polytetrafluoroethylene coating.

[0012] In the preferred embodiment of the above-mentioned single-cylinder flow metering device, the thickness of the piston is greater than the inner diameter of the outlet.

[0013] The beneficial effect of this utility model is that by setting the outlet between the first inlet and the second inlet, when the piston reciprocates in the valve chamber, fluid always flows into the outlet through the space below or above the piston in the valve chamber, thus ensuring the efficiency of fluid output of this application. Attached Figure Description

[0014] Figure 1 This is the front view of the present invention;

[0015] Figure 2 This is a schematic diagram showing the connection between the valve cylinder and the piston.

[0016] In the diagram: valve cylinder 1, valve chamber 11, first inlet 12, second inlet 13, outlet 14, piston 2, pressure sensor 3, drive structure 4, flow valve 5. Detailed Implementation

[0017] Preferred embodiments of the present invention will now be described with reference to the accompanying drawings. Those skilled in the art should understand that these embodiments are merely illustrative of the technical principles of the present invention and are not intended to limit the scope of protection of the present invention.

[0018] It should be noted that in the description of this utility model, terms such as "upper," "lower," "left," "right," "front," and "rear," which indicate direction or positional relationships, are based on the direction or positional relationships shown in the accompanying drawings. These are used merely for ease of description and do not indicate or imply that the device or element must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] Furthermore, it should be noted that, in the description of this utility model, unless otherwise explicitly specified and limited, the terms "set," "connected," and "linked" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] like Figures 1 to 2As shown, the single-cylinder flow metering device of this utility model includes: a valve cylinder 1, which has a valve chamber 11 and a first inlet 12, a second inlet 13 and an outlet 14 communicating with the valve chamber 11, with the outlet 14 located between the first inlet 12 and the second inlet 13; a piston 2, which is movably disposed in the valve chamber 11; and a pressure sensor 3, which is disposed at the outlet 14 and is used to detect the pressure of the fluid flowing out through the outlet 14.

[0021] See Figure 1 , Figure 2 The valve cylinder 1 has a valve chamber 11, one end of which passes through the valve cylinder 1. The valve cylinder 1 has a first inlet 12, a second inlet 13, and an outlet 14. The first inlet 12, the second inlet 13, and the outlet 14 are all connected to the valve chamber 11. In the height direction of the valve cylinder 1, the outlet 14 is located between the first inlet 12 and the second inlet 13. The piston 2 is movably disposed in the valve chamber 11 of the valve cylinder 1, and the outer ring of the piston 2 fits the inner wall of the valve chamber 11. A pressure sensor 3 is disposed on the outlet 14 of the valve cylinder 1. When the fluid flows out through the outlet 14, the pressure sensor 3 can detect the pressure change of the fluid, thereby calculating the fluid velocity and then obtaining the fluid flow rate, realizing real-time monitoring of fluid pressure and flow rate.

[0022] Specifically, when outputting fluid, the fluid is introduced into the valve chamber 11 through the first inlet 12 and the second inlet 13. The piston 2 is controlled to move vertically back and forth within the valve chamber 11. When the piston 2 is pushed down to the position below the outlet 14, a negative pressure is formed in the valve chamber 11 above the piston 2, causing the fluid to enter the upper space inside the valve chamber 11 through the first inlet 12 and be discharged through the outlet 14. When the piston 2 moves up to the position above the outlet 14, a negative pressure is formed in the valve chamber 11 below the piston 2, causing the fluid to enter the lower space inside the valve chamber 11 through the second inlet 13 and be discharged through the outlet 14. As the piston 2 moves back and forth within the valve chamber 11, it ensures that fluid always flows into the space above and below the piston 2 within the valve chamber 11 and is discharged through the outlet 14, thus improving the fluid output efficiency of this application. In addition, when the fluid flows out through the outlet 14, the fluid passes through the pressure sensor 3. The pressure sensor 3 can detect the pressure change of the fluid, thereby obtaining the fluid flow rate and realizing the monitoring of the fluid flow rate. This application ensures the efficiency of fluid output by setting the outlet 14 between the first inlet 12 and the second inlet 13, so that when the piston 2 reciprocates in the valve chamber 11, fluid always flows into the outlet 14 through the space below or above the piston 2 in the valve chamber 11.

[0023] In one or more embodiments, the first inlet 12 and the second inlet 13 are located on the same side of the valve cylinder 1, and the outlet 14 is located on the side of the valve cylinder 1 away from the first inlet 12 and the second inlet 13.

[0024] See Figure 1 , Figure 2 The first inlet 12 and the second inlet 13 are located on the same side of the valve cylinder 1, and the outlet 14 is located on the other side of the valve cylinder 1. By arranging the first inlet 12, the second inlet 13 and the outlet 14 at different positions in the valve cylinder 1, it is convenient to route the pipelines installed in the first inlet 12, the second inlet 13 and the outlet 14, thereby improving the aesthetics of the metering equipment of this application.

[0025] In one or more embodiments, the piston 2 is controlled by the drive structure 4 to move within the valve chamber 11. When the single-cylinder flow metering device of this application is applied to a specific device, the drive structure 4 and the valve cylinder 1 are fixed to the device so that the drive structure 4 drives the piston 2 to reciprocate within the valve chamber 11 of the valve cylinder 1; by setting the drive structure 4 to drive the piston 2 to reciprocate, the output efficiency of the fluid can be improved, and it has the characteristics of high automation and stable fluid output.

[0026] In the first embodiment of the drive structure 4, the drive structure 4 includes a stepper motor, a lead screw located at the end of the stepper motor's rotating shaft, and a slide table located at the top of the piston 2, wherein the slide table is threadedly connected to the lead screw.

[0027] See Figure 1 The drive structure 4 includes a stepper motor, a lead screw, and a slide table. A guide rod is mounted on the top of the piston 2 and can move up and down synchronously with the slide table. The slide table and the lead screw are connected by a thread. Specifically, when the piston 2 reciprocates within the valve chamber 11 of the valve cylinder 1, the lead screw is rotated by the stepper motor, causing the slide table to move on the lead screw. It should be noted that by controlling the rotation direction of the stepper motor shaft, the slide table can be moved up and down on the lead screw, thereby causing the slide table to drive the piston 2 to move vertically up and down within the valve chamber 11 of the valve cylinder 1. This design has the advantages of high precision in piston 2 motion control, simple structure, and convenient operation, and is practical.

[0028] In the second embodiment of the drive structure 4, the drive structure 4 is a telescopic cylinder, and the shaft end of the telescopic cylinder is connected to the top surface of the piston 2. The attached figure does not show the structure when the drive structure 4 is a telescopic cylinder. The drive shaft end of the telescopic cylinder is directly or indirectly connected to the top surface of the piston 2, so that while the telescopic cylinder controls the extension or retraction of its shaft end, the position of the piston 2 in the valve chamber 11 of the valve cylinder 1 can be controlled.

[0029] In one or more embodiments, both the first inlet 12 and the second inlet 13 are equipped with flow valves 5 or switching valves.

[0030] See Figure 1The flow valve 5 or the on / off valve is used to control the flow rate entering the first inlet 12 or the second inlet 13. The first inlet 12 can be equipped with a separate flow valve 5 or the on / off valve, and the second inlet 13 can be equipped with a separate flow valve 5 or the on / off valve. Alternatively, the first inlet 12 and the second inlet 13 can share a single flow valve 5 or the on / off valve. There are no specific restrictions, and the valve can be selected according to actual production needs.

[0031] In one or more embodiments, the valve cavity 11, the first inlet 12, the second inlet 13 and the outlet 14 are coated with a polytetrafluoroethylene coating.

[0032] It should be noted that the polytetrafluoroethylene coating has certain self-lubricating and anti-corrosion effects, which can ensure the flow efficiency of fluid in the valve cavity 11, the first inlet 12, the second inlet 13 and the outlet 14, while further reducing the possibility of corrosion inside the valve cylinder 1 and improving the service life of the metering equipment of this application.

[0033] In one or more embodiments, the thickness of piston 2 is greater than the inner diameter of outlet 14.

[0034] See Figure 2 By setting the thickness of piston 2 to be greater than the diameter of outlet 14, when piston 2 moves up or down through outlet 14, the side of piston 2 can block outlet 14, ensuring that valve chamber 11 generates a negative pressure suction effect in the space below or above piston 2.

[0035] The above embodiments are only for illustrating the technical concept and features of this utility model. Their purpose is to enable those skilled in the art to understand the content of this utility model and implement it. They cannot be used to limit the protection scope of this utility model. All equivalent changes or modifications made in accordance with the spirit and essence of this utility model should be covered within the protection scope of this utility model.

Claims

1. A single-cylinder flow metering device, characterized in that, include: A valve cylinder having a valve chamber and a first inlet, a second inlet, and an outlet communicating with the valve chamber, the outlet being located between the first inlet and the second inlet; A piston, which is movably disposed within the valve chamber; A pressure sensor is configured at the outlet to detect the pressure of the fluid flowing out of the outlet.

2. The single-cylinder flow metering device according to claim 1, characterized in that: The first inlet and the second inlet are located on the same side of the valve cylinder, and the outlet is located on the side of the valve cylinder away from the first inlet and the second inlet.

3. The single-cylinder flow metering device according to claim 1, characterized in that: The piston is controlled by a drive mechanism to move within the valve chamber.

4. The single-cylinder flow metering device according to claim 3, characterized in that: The drive structure includes a stepper motor, a lead screw located at the rotating shaft end of the stepper motor, and a slide table located at the top of the piston, wherein the slide table is threadedly connected to the lead screw.

5. The single-cylinder flow metering device according to claim 3, characterized in that: The drive structure is a telescopic cylinder, and the shaft end of the telescopic cylinder is connected to the top surface of the piston.

6. The single-cylinder flow metering device according to claim 1, characterized in that: Both the first inlet and the second inlet are equipped with flow valves or on / off valves.

7. The single-cylinder flow metering device according to claim 1, characterized in that: The valve cavity, first inlet, second inlet and outlet are coated with polytetrafluoroethylene.

8. The single-cylinder flow metering device according to claim 1, characterized in that: The thickness of the piston is greater than the inner diameter of the outlet.

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