Device for measuring relation between stroke and volume of diaphragm

Abstract

The utility model discloses a device for measuring the relation between the stroke and the volume of a diaphragm, which comprises a diaphragm chamber and a guide rod stroke control device, a diaphragm cavity is arranged on the diaphragm chamber, a diaphragm is arranged in the diaphragm cavity, the diaphragm and the cavity wall on one side of the diaphragm cavity form a sealed volume cavity, an exhaust hole is arranged on the diaphragm chamber, and the guide rod stroke control device is arranged on the guide rod stroke control device. The volume cavity is communicated with the outside through the exhaust hole; the guide rod travel control device comprises a guide rod mounted on the diaphragm chamber, and the guide rod extends into the volume cavity and is connected with the diaphragm; and the oil filling device is communicated with the volume cavity through a pipeline. The diaphragm stroke and volume testing device is simple in structure, convenient to operate and low in cost, the relation between the diaphragm stroke and the volume can be accurately obtained, and good guidance is provided for specification selection of the diaphragm.

Description

Technical Field

[0001] The utility model relates to the technical field of diaphragm pump testing, in particular to a device for measuring the relationship between diaphragm stroke and volume. Background Art

[0002] For a diaphragm pump, the actual containment volume of the diaphragm is particularly important for the selection of the diaphragm pump diaphragm specifications. Selecting a diaphragm that is too large will cause an increase in the diaphragm chamber, thereby greatly increasing costs, while selecting one that is too small will cause unstable operation. Therefore, a reasonable diaphragm utilization rate is the key to achieving the best economy. Currently, when a diaphragm pump is in operation, it is necessary to restrict the movement of the diaphragm to ensure that the diaphragm reciprocates within a reasonable range and prevent excessive stretching of the diaphragm. The determination of this position needs to be selected according to a reasonable primary volume ratio. To obtain an accurate primary volume ratio, it is necessary to measure the suction and discharge oil volumes generated when the diaphragm moves to various positions. Currently, the device for testing the relationship between diaphragm stroke and volume adopts a dedicated testing device and collects data through multiple sensors, which is costly and has poor economy, and it is difficult to simulate the relationship between the stroke and volume of the diaphragm in the actual operating environment, and the test data is not accurate enough. Summary of the Utility Model

[0003] Aiming at the above deficiencies existing in the prior art, the purpose of the present utility model is to provide a device for measuring the relationship between diaphragm stroke and volume, so as to solve the problems of complex structure, high cost, poor economy and low test accuracy in the prior art.

[0004] To solve the above technical problems, the technical solution adopted by the present utility model is as follows: A device for measuring the relationship between diaphragm stroke and volume includes a diaphragm chamber and a guide rod stroke control device. A diaphragm cavity is provided on the diaphragm chamber, and a diaphragm is installed in the diaphragm cavity, so that the diaphragm and one side wall of the diaphragm cavity form a sealed volume cavity, and an exhaust hole is provided on the diaphragm chamber, and the exhaust hole communicates the volume cavity with the outside; the guide rod stroke control device includes a guide rod installed on the diaphragm chamber, and the guide rod extends into the volume cavity and is connected to the diaphragm; a fuel filling device is further included, and the fuel filling device communicates with the volume cavity through a pipeline.

[0005] As an optimization, the diaphragm cavity is opened on one side of the diaphragm chamber, a through hole communicating with the diaphragm cavity is opened on the other side of the diaphragm chamber, the diaphragm is installed on the side of the diaphragm cavity close to the through hole, so that the through hole communicates with the volume cavity; a cover is installed on the side of the diaphragm chamber where the through hole is opened to close the through hole, a pipeline installation hole and a guide rod installation hole are provided on the cover, the pipeline passes through the pipeline installation hole and then communicates with the volume cavity, and the guide rod passes through the guide rod installation hole and is connected to the diaphragm.

[0006] As an optimization, the guide rod is connected to the guide rod mounting hole by screw thread fit; or the guide rod is connected to the guide rod mounting hole by sliding fit, and a limit nut is installed on the guide rod for adjusting the axial movement of the guide rod.

[0007] As an optimization, the oil filling device includes an oil cup, an overflow port is provided on one side of the oil cup, and the bottom of the oil cup is connected to the pipeline.

[0008] As an optimization, an exhaust valve is installed at one end of the exhaust hole facing away from the volume chamber.

[0009] As an optimization, an oil return pipe is installed on the exhaust valve, and one end of the oil return pipe communicates with the upper part of the oil cup.

[0010] Compared with the prior art, the present utility model has the following advantages:

[0011] 1. Simulates the actual operating state of the diaphragm, and can accurately obtain the relationship between the diaphragm stroke and the volume.

[0012] 2. The structure is simple, and the product parts are used for the test, saving costs. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 is a schematic structural diagram of the present utility model;

[0014] In the figure: 1 diaphragm chamber, 2 diaphragm cavity, 3 diaphragm, 4 exhaust hole, 5 guide rod, 6 through hole, 7 cover, 8 limit nut, 9 oil cup, 10 overflow port, 11 exhaust valve, 12 oil return pipe. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0015] The present utility model will be further described below in conjunction with the drawings and embodiments.

[0016] To make the purpose, technical solutions and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below in conjunction with the drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Therefore, the detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but only represents the selected embodiments of the present utility model. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts belong to the scope of protection of the present utility model.

[0017] It should be noted that like reference numerals and letters refer to like items in the following figures. Therefore, once an item is defined in one figure, it does not need to be further defined and explained in subsequent figures. In the description of the present invention, it should be noted that the orientation or positional relationship indicated by the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. is based on the orientation or positional relationship shown in the figures, or the orientation or positional relationship in which the product of the invention is usually placed during use. It is only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be construed as a limitation of the present invention. In addition, the terms "first", "second", "third", etc. are only used for descriptive distinction and cannot be understood as indicating or implying relative importance. In addition, terms such as "horizontal" and "vertical" do not mean that the components are required to be absolutely horizontal or hanging, but can be slightly inclined. For example, "horizontal" only means that its direction is more horizontal relative to "vertical", and does not mean that the structure must be completely horizontal, but can be slightly inclined. In the description of the present invention, it should also be noted that unless otherwise clearly specified and defined, the terms "set", "install", "connect", "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 directly connected or indirectly connected through an intermediate medium, and can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0018] Embodiment 1: Refer to Figure 1 , a device for measuring the relationship between diaphragm stroke and volume, including a diaphragm chamber 1 and a guide rod stroke control device. A diaphragm cavity 2 is provided on the diaphragm chamber 1, and a diaphragm 3 is installed in the diaphragm cavity 2, so that the diaphragm 3 forms a sealed volume cavity with one side wall of the diaphragm cavity 2, and an exhaust hole 4 is provided on the diaphragm chamber 1. The exhaust hole 4 communicates the volume cavity with the outside; the guide rod stroke control device includes a guide rod 5 installed on the diaphragm chamber 1. The guide rod 5 extends into the volume cavity and is connected to the diaphragm 3; it also includes a refueling device, and the refueling device communicates with the volume cavity through a pipeline.

[0019] Specifically, the diaphragm chamber 1 can adopt actual diaphragm pump components, which do not need to be manufactured separately, saving costs. Only a guide rod 5 capable of determining its position is needed to drive the diaphragm 3 to move, and then the refueling device is used to refuel the volume cavity. By the amount of oil added to the volume cavity and the moving distance of the guide rod 5, the relationship between diaphragm stroke and volume can be obtained, thus simulating the actual operating state of the diaphragm 3, and the relationship between diaphragm stroke and volume can be obtained more accurately. Moreover, the structure is simple, directly using product parts for testing, saving costs.

[0020] Specifically, the diaphragm cavity 2 is opened on one side of the diaphragm chamber 1. A through hole 6 communicating with the diaphragm cavity 2 is opened on the other side of the diaphragm chamber 1. The diaphragm 3 is installed on the side of the diaphragm cavity 2 close to the through hole 6, so that the through hole 6 communicates with the volume cavity; A cover 7 is installed on the side of the diaphragm chamber 1 where the through hole 6 is opened to close the through hole 6. A pipeline installation hole and a guide rod installation hole are provided on the cover 7. The pipeline passes through the pipeline installation hole and communicates with the volume cavity. The guide rod 5 passes through the guide rod installation hole and is connected to the diaphragm 3. The cover 7 can be reused to adapt to diaphragm pumps of various specifications, test diaphragms 3 of various specifications, improve versatility and reduce costs.

[0021] Among them, the guide rod 5 is in threaded fit connection with the guide rod installation hole. The position of the guide rod 5 is adjusted by the thread, so as to determine the stroke of the diaphragm 3. Or the guide rod 5 is in sliding fit connection with the guide rod installation hole, and a limit nut 8 is installed on the guide rod 5 to adjust the axial movement of the guide rod 5. The limit nut 8 can be fixed to the preset position of the guide rod 5 by fitting or threaded fit with the cover 7 and other fitting methods, so as to adjust the stroke of the guide rod 5 and determine the stroke of the diaphragm 3.

[0022] Specifically, the oil filling device includes an oil cup 9. An overflow port 10 is provided on one side of the oil cup 9. The bottom of the oil cup 9 is connected to the pipeline. Among them, marks such as scales that can display the oil volume can be set on the oil cup 9 to determine the oil volume added to the volume cavity.

[0023] In order to facilitate the air discharge in the volume cavity during oil filling, an exhaust valve 11 is installed at the end of the exhaust hole 4 facing away from the volume cavity. And in order to prevent oil spillage or waste and for oil recovery, an oil return pipe 12 is installed on the exhaust valve 11. One end of the oil return pipe 12 communicates with the upper part of the oil cup 9.

[0024] During use, first adjust the position of the guide rod 5 to make the diaphragm 3 in the initial position, and record the position of the guide rod 5. Open the exhaust valve 11 and add oil to the oil cup 9 until the liquid level of the oil is flush with the overflow port 10, and stop adding oil. At this time, the volume cavity is filled with oil. Then adjust the guide rod 5 to move a preset stroke. The volume of the volume cavity becomes larger and the liquid level of the oil drops. At this time, the oil volume entering the volume cavity can be determined by observing the amount of the liquid level drop or the amount of oil added to the oil cup 9 until it is flush with the overflow port 10, so as to form a corresponding relationship with the stroke of the guide rod 5, and thus determine the relationship between the stroke of the diaphragm 3 and the volume at this time. Repeat in turn to obtain the relationship between the diaphragm 3 and the volume in various stroke states.

[0025] In summary, the utility model has a simple structure, is convenient to operate, the cost of the test device is relatively low, and can accurately obtain the relationship between the diaphragm stroke and the volume, providing a good guidance for the selection of the diaphragm specifications.

[0026] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention rather than limiting them. Those of ordinary skill in the art should understand that any modifications or equivalent replacements made to the technical solutions of the present invention without departing from the purpose and scope of the technical solutions should be covered within the scope of the claims of the present invention.

Claims

1. A device for measuring the relationship between diaphragm stroke and volume, characterized in that: It includes a diaphragm chamber and a guide rod stroke control device. A diaphragm cavity is provided on the diaphragm chamber, and a diaphragm is installed in the diaphragm cavity, so that the diaphragm and one side wall of the diaphragm cavity form a sealed volume cavity. An exhaust hole is provided on the diaphragm chamber, and the exhaust hole communicates the volume cavity with the outside; the guide rod stroke control device includes a guide rod installed on the diaphragm chamber, and the guide rod extends into the volume cavity and is connected to the diaphragm; it also includes an oil filling device, and the oil filling device communicates with the volume cavity through a pipeline.

2. The device for measuring the relationship between the diaphragm stroke and the volume according to claim 1, characterized in that: The diaphragm cavity is opened on one side of the diaphragm chamber, and a through hole communicating with the diaphragm cavity is opened on the other side of the diaphragm chamber. The diaphragm is installed on the side of the diaphragm cavity close to the through hole, so that the through hole communicates with the volume cavity; a cover is installed on the side of the diaphragm chamber where the through hole is opened to close the through hole. A pipeline installation hole and a guide rod installation hole are provided on the cover. The pipeline passes through the pipeline installation hole and then communicates with the volume cavity. The guide rod passes through the guide rod installation hole and then is connected to the diaphragm.

3. The device for measuring the relationship between the diaphragm stroke and the volume according to claim 1, characterized in that: The guide rod is connected to the guide rod installation hole by screw thread fit; or the guide rod is connected to the guide rod installation hole by sliding fit, and a limit nut is installed on the guide rod to adjust the axial movement of the guide rod.

4. A device for measuring the relationship between the diaphragm stroke and the volume according to claim 1, characterized in that: The oil filling device includes an oil cup. An overflow port is provided on one side of the oil cup, and the bottom of the oil cup is connected to the pipeline.

5. The device for measuring the relationship between the diaphragm stroke and the volume according to claim 4, characterized in that: An exhaust valve is installed at the end of the exhaust hole facing away from the volume cavity.

6. The device for measuring the relationship between the diaphragm stroke and the volume according to claim 5, characterized in that: A return oil pipe is installed on the exhaust valve, and one end of the return oil pipe communicates with the upper part of the oil cup.

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