Oil-water-gas separation device with filtering function for calibrating plastic pipe pressure resistance testing machine

Abstract

The utility model relates to the technical field of oil-water separation, and discloses an oil-water-gas separation device with a filtering function for a calibration plastic pipe pressure resistance testing machine, which comprises a cylinder body, one side of the outer wall of the cylinder body is fixedly connected with a filter, and one side of the outer wall of the filter is fixedly connected with a pressure external interface. The two sides of the filter are fixedly connected with stainless steel flanges, the interiors of the stainless steel flanges are slidably connected with double-end threaded columns, the two sides of the outer wall of each double-end threaded column are in threaded connection with nuts, one side of the interior of the cylinder body is provided with an etalon external connector, and the interior of the cylinder body is slidably connected with a piston. According to the oil-water-gas separation device, in the process that liquid flows from a tested device to the cylinder body, the filter plays a role in filtering, impurities in the liquid are effectively filtered out, and the impurities are prevented from entering the cylinder body, so that a good filtering effect is achieved, and the problem that the separation effect is reduced due to the fact that water is directly guided into the oil-water-gas separation device is solved; and the separation quality and purity of the device are improved.

Description

Technical Field

[0001] The utility model relates to the technical field of oil-water-gas separation, in particular to an oil-water-gas separation device with a filtering function for a calibration plastic pipe pressure test machine. Background Art

[0002] The plastic pipe pressure tester can accurately measure the pressure resistance of the pipe, and uses high-precision sensors to ensure that the test data is accurate and reliable. It has a variety of test modes to meet the testing needs of plastic pipes of different specifications and types. It is simple and convenient to operate, easy to use, sturdy and durable, and can run stably for a long time. When calibrating the plastic pipe pressure tester, the oil-water-gas separation device can effectively remove the oil, water and gas in the test medium to ensure the accuracy and reliability of the test results.

[0003] The plastic pipe pressure tester is a special device that evaluates the performance of plastic pipes by giving different types of plastic pipes the condition of bearing internal pressure at a certain temperature. The national calibration specification JJF 1628-2017 "Plastic Pipe Pressure Tester" requires a 0.05-level digital pressure gauge as the standard instrument. The pressure transmission medium of the digital pressure gauge is oil, while the pressure transmission medium in the plastic pipe pressure tester is water. If the digital pressure gauge is used directly for calibration, it will cause mutual contamination of the media and affect the accuracy of the digital pressure gauge.

[0004] The existing technology also uses an oil-water separation device for the above calibration, but water generally contains impurities, and there will inevitably be gas in the pipeline. If the oil-water separation device is used directly, the separation effect will be reduced, resulting in low purity of the separated oil and water. At the same time, it will cause mutual contamination between the media, affecting their quality and purity, and the presence of gas will affect the stability of the pressure. For this reason, an oil-water-gas separation device with a filtering function for calibrating a plastic pipe pressure test machine is proposed to solve the above problems. Utility Model Content

[0005] In order to make up for the above shortcomings, the utility model provides an oil-water-gas separation device for a calibrated plastic pipe pressure testing machine with a filtering function, aiming to improve the problem in the prior art that water is directly introduced into the oil-water-gas separation device, thereby reducing the separation effect.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] An oil-water-gas separation device for a calibrated plastic pipe pressure test machine with filtering function comprises a cylinder body, a filter is fixedly connected to one side of the outer wall of the cylinder body, a pressure external interface is fixedly connected to one side of the outer wall of the filter, stainless steel flanges are fixedly connected to both sides of the filter, a double-headed threaded column is slidably connected inside the stainless steel flange, nuts are threadedly connected to both sides of the outer wall of the double-headed threaded column, a standard external interface is provided on one side of the cylinder body, a piston is slidably connected inside the cylinder body, two Gley rings are fixedly connected to the outer wall of the piston, sealing rings are fixedly connected to both sides of the outer wall of the cylinder body, one side of the outer wall of the sealing ring is in contact with the outer wall of the stainless steel flange, exhaust components are arranged on both sides of the cylinder body, and the exhaust components are used to control the discharge of gas inside the cylinder body;

[0008] As a further description of the above technical solution:

[0009] The exhaust assembly includes an automatic exhaust valve, one side of the outer wall of which is threadedly connected to the inside of the cylinder body;

[0010] As a further description of the above technical solution:

[0011] A fixed threaded cover is threadedly connected to one side of the automatic exhaust valve, and a spring is arranged on one side of the fixed threaded cover;

[0012] As a further description of the above technical solution:

[0013] A valve core is slidably connected inside the automatic exhaust valve, one end of the spring is fixedly connected to one side of the outer wall of the fixed threaded cover, and the other end of the spring is fixedly connected to one side of the outer wall of the valve core;

[0014] As a further description of the above technical solution:

[0015] An exhaust hole is provided on one side of the valve core, and a pressure relief hole is provided on one side of the automatic exhaust valve.

[0016] As a further description of the above technical solution:

[0017] A first card slot is provided inside the automatic exhaust valve, a second card slot is provided inside the automatic exhaust valve, and a third card slot is provided inside the automatic exhaust valve;

[0018] As a further description of the above technical solution:

[0019] The outer wall of the valve core is fixedly connected with two O-rings, and the outer wall of the O-ring fits with the two inner walls of the groove;

[0020] As a further description of the above technical solution:

[0021] The outer wall of the O-ring is in contact with the third inner wall of the card slot, and the outer wall of the O-ring is in contact with the first inner wall of the card slot.

[0022] The utility model has the following beneficial effects:

[0023] 1. In the utility model, the filter is used to connect the cylinder body and the pressure external interface. In the process of liquid flowing from the measured device to the cylinder body, the filter will play its filtering role, effectively filter out impurities therein, and prevent impurities from entering the cylinder body, thereby achieving a good filtering effect, solving the problem that the separation effect will be reduced when water is directly introduced into the oil-water-gas separation device, and improving the separation quality and purity of the device.

[0024] 2. In the utility model, firstly, the valve core slides to control the O-ring to fit with two of the first, second and third grooves, so that the gas is discharged through the exhaust hole and the pressure relief hole, or is sealed by the O-ring, thereby automatically controlling the discharge and sealing of the gas. The automatic exhaust valves on both sides are respectively located in the oil chamber and the water chamber, which effectively discharge the gas in the chamber and ensure the stability of the piston operation. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 A three-dimensional schematic diagram of an oil-water-gas separation device for a calibration plastic pipe pressure test machine with filtering function proposed by the utility model;

[0026] Figure 2 This is a schematic diagram of the structure of the automatic exhaust valve of the oil-water-gas separation device for the calibration plastic pipe pressure test machine with filtering function proposed by the utility model;

[0027] Figure 3 This is a schematic diagram of the cross-sectional structure of the automatic exhaust valve of the oil-water-gas separation device for the calibration plastic pipe pressure test machine with filtering function proposed by the utility model;

[0028] Figure 4 This is a schematic diagram of the slot structure of the oil-water-gas separation device for the calibration plastic pipe pressure testing machine with filtering function proposed by the utility model.

[0029] Legend:

[0030] 1. Pressure external interface; 2. Filter; 3. Stainless steel flange; 4. Cylinder body; 5. Double-ended threaded column; 6. Nut; 7. Automatic exhaust valve; 8. Standard external interface; 9. Piston; 10. Gly ring; 11. Sealing ring; 12. Pressure relief hole; 13. Exhaust hole; 14. O-ring; 15. Fixed threaded cover; 16. Valve core; 17. Spring; 18. Slot 1; 19. Slot 2; 20. Slot 3. DETAILED DESCRIPTION

[0031] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in 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.

[0032] Reference Figure 1 , the utility model provides an embodiment: an oil-water gas separation device for a calibration plastic pipe pressure test machine with a filtering function, comprising a cylinder body 4, a filter 2 is fixedly connected to one side of the outer wall of the cylinder body 4, a pressure external interface 1 is fixedly connected to one side of the outer wall of the filter 2, stainless steel flanges 3 are fixedly connected on both sides of the filter 2, a double-headed threaded column 5 is slidably connected inside the stainless steel flange 3, nuts 6 are threadedly connected on both sides of the outer wall of the double-headed threaded column 5, a standard device external interface 8 is opened on one side of the cylinder body 4, a piston 9 is slidably connected inside the cylinder body 4, two Gley rings 10 are fixedly connected to the outer wall of the piston 9, sealing rings 11 are fixedly connected to both sides of the outer wall of the cylinder body 4, and one side of the outer wall of the sealing ring 11 is in contact with the outer wall of the stainless steel flange 3;

[0033] Specifically, the filter 2 connects the cylinder body 4 and the pressure external interface 1. When the liquid flows into the cylinder body 4 through the measured device, the filter 2 will filter out impurities to prevent impurities from entering the cylinder body 4, thereby achieving the filtering effect. The filter screen of the filter 2 valve is made of cast copper and has good rust resistance. The size can be selected according to actual needs and can be cleaned and reused repeatedly. The stainless steel flange 3 plays a role in fixing the cylinder body 4 by cooperating with the double-headed threaded column 5 and the nut 6. The cylinder body 4 is fixed by the stainless steel flange 3, the double-headed threaded column 5 and the nut 6, which increases the pressure inside the cylinder body 4 compared to the threaded fixing method on the market. A stainless steel column with a diameter of 14 mm is selected. The pressure range of the 14 mm stainless steel column is 25 to 40 MPa, which can meet the pressure requirement of not less than 25 MPa in the specification.

[0034] Reference Figure 1 - Figure 4, exhaust components are arranged on both sides of the cylinder body 4, and the exhaust components are used to control the exhaust of the gas inside the cylinder body 4. The exhaust components include an automatic exhaust valve 7, one side of the outer wall of the automatic exhaust valve 7 is threadedly connected to the inside of the cylinder body 4, one side of the automatic exhaust valve 7 is threadedly connected to a fixed threaded cover 15, one side of the fixed threaded cover 15 is provided with a spring 17, and a valve core 16 is slidably connected to the automatic exhaust valve 7, one end of the spring 17 is fixedly connected to one side of the outer wall of the fixed threaded cover 15, and the other end of the spring 17 is fixedly connected to the outer wall of the valve core 16. On one side of the wall, an exhaust hole 13 is provided on one side of the inner part of the valve core 16, a pressure relief hole 12 is provided on one side of the inner part of the automatic exhaust valve 7, a card groove 18 is provided on the inner part of the automatic exhaust valve 7, a card groove 2 19 is provided on the inner part of the automatic exhaust valve 7, a card groove 3 20 is provided on the inner part of the automatic exhaust valve 7, two O-rings 14 are fixedly connected to the outer wall of the valve core 16, the outer wall of the O-ring 14 is fitted with the inner wall of the card groove 2 19, the outer wall of the O-ring 14 is fitted with the inner wall of the card groove 3 20, and the outer wall of the O-ring 14 is fitted with the inner wall of the card groove 1 18;

[0035] Specifically, the automatic exhaust valve 7 is fixed to the stainless steel flange 3 and the cylinder body 4 by means of threads. The end face of the valve core 16 of the automatic exhaust valve 7 is provided with an exhaust hole 13, which extends from the axial direction of the automatic exhaust valve 7 to a direction perpendicular to the axial direction. When the pressure in the cylinder body 4 is relatively small, the spring 17 on the valve core 16 is in a natural state. At this time, the exhaust hole 13 on the valve core 16 coincides with the pressure relief hole 12 on the surface of the valve body, and the O-ring 14 is respectively located inside the first groove 18 and the second groove 19, so that the cylinder body 4 and the outside world are in a connected state. When the pressure in the cylinder body 4 rises slowly, the gas is squeezed out. After the pressure in the cavity increases to the point where the spring 17 on the valve core 16 is compressed and deformed, the exhaust hole 13 on the valve core 16 moves to the left as a whole with the spring 17. At this time, the O-ring 14 is located inside the second groove 19 and the third groove 20, thereby separating the pressure relief hole 12 and the exhaust hole 13, blocking the channel. To ensure effective sealing of the liquid in the cylinder, the middle O-ring 14 plays the role of blocking the exhaust hole 13 on the valve core 16 and the pressure relief hole 12 on the valve body surface, ensuring that the cylinder pressure can still be well sealed within a certain range. The cylinder body 4 is made of 304 stainless steel, which is resistant to oil and acid and alkali corrosion. The inner surface is finely processed and the surface roughness can reach 4μm, thereby ensuring the matching accuracy with the piston 9. The external interface 8 of the standard device is a reserved interface on the stainless steel flange 3 and the cylinder body 4, which can be connected to a digital pressure gauge. When the piston 9 is under pressure, it can move smoothly in the cylinder body 4, thereby dividing the cavity space into two parts and blocking different pressure transmission media. The piston 9 has two grooves in the vertical axis and is equipped with a gray ring 10, whose function is to increase a certain amount of damping, so that the piston 9 and the inner plane of the cylinder body 4 are effectively in contact, avoiding the piston 9 jamming caused by the non-coincidence of the axis of the piston 9 and the axis of the cylinder body 4 caused by abnormal factors.

[0036] Working principle: On one side of the cylinder body 4, the filter 2 connects the pressure external interface 1 with the inside of the cylinder body 4, so that the liquid enters the pressure external interface 1 after being filtered by the filter 2 to avoid interference from impurities. The stainless steel flange 3 on both sides of the cylinder body 4 is connected, and the nut 6 is tightened by turning, so that the stainless steel flanges 3 on both sides can be fixed to the cylinder body 4, and the sealing ring 11 makes the two connected in a sealed manner. The cylinder body 4 is provided with a standard device external interface 8, which can be connected to a digital pressure gauge. The piston 9 slides inside the cylinder body 4, and a gray ring 10 is provided on the outside to avoid When the pressure inside the cylinder body 4 is relatively low, the O-ring 14 on the valve core 16 will be stuck in the inside of the first groove 18 and the second groove 19 under the action of the spring 17, so that the exhaust hole 13 inside the valve core 16 is aligned with the pressure relief hole 12 inside the automatic exhaust valve 7, so that the gas is discharged. When the pressure inside the cylinder body 4 increases, the spring 17 can be compressed to make the valve core 16 slide, and the O-ring 14 on the valve core 16 will be stuck in the inside of the second groove 19 and the third groove 20, so that the exhaust hole 13 and the pressure relief hole 12 are blocked, so that the gas inside the cylinder body 4 is no longer discharged.

[0037] Finally, it should be noted that the above is only a preferred embodiment of the present invention and is not intended to limit the present invention. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art can still modify the technical solutions described in the aforementioned embodiments or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. An oil-water-gas separation device for a calibration plastic pipe pressure test machine with filtering function, comprising a cylinder (4), characterized in that: A filter (2) is fixedly connected to one side of the outer wall of the cylinder body (4), and a pressure external interface (1) is fixedly connected to one side of the outer wall of the filter (2). Stainless steel flanges (3) are fixedly connected to both sides of the filter (2). A double-headed threaded column (5) is slidably connected inside the stainless steel flange (3), and nuts (6) are threadedly connected to both sides of the outer wall of the double-headed threaded column (5). A standard external interface (8) is provided on one side of the interior of the cylinder body (4). A piston (9) is slidably connected inside the cylinder body (4), and two Gly rings (10) are fixedly connected to the outer wall of the piston (9). Sealing rings (11) are fixedly connected to both sides of the outer wall of the cylinder body (4), and one side of the outer wall of the sealing ring (11) is in contact with the outer wall of the stainless steel flange (3). Exhaust components are provided on both sides of the interior of the cylinder body (4), and the exhaust components are used to control the discharge of gas inside the cylinder body (4).

2. The oil-water-gas separation device for a calibration plastic pipe pressure test machine with filtering function according to claim 1 is characterized in that: The exhaust component comprises an automatic exhaust valve (7), and one side of the outer wall of the automatic exhaust valve (7) is threadedly connected to the inside of the cylinder body (4).

3. The oil-water-gas separation device for a calibration plastic pipe pressure test machine with filtering function according to claim 2 is characterized in that: A fixed threaded cover (15) is threadedly connected to one side of the interior of the automatic exhaust valve (7), and a spring (17) is provided on one side of the fixed threaded cover (15).

4. The oil-water-gas separation device for a calibration plastic pipe pressure test machine with filtering function according to claim 3 is characterized in that: The automatic exhaust valve (7) is slidably connected to a valve core (16), one end of the spring (17) is fixedly connected to one side of the outer wall of the fixed threaded cover (15), and the other end of the spring (17) is fixedly connected to one side of the outer wall of the valve core (16).

5. The oil-water-gas separation device for a calibration plastic pipe pressure test machine with filtering function according to claim 4, characterized in that: An exhaust hole (13) is provided on one side of the interior of the valve core (16), and a pressure relief hole (12) is provided on one side of the interior of the automatic exhaust valve (7).

6. The oil-water-gas separation device for a calibration plastic pipe pressure test machine with filtering function according to claim 5, characterized in that: The automatic exhaust valve (7) has a first card slot (18) formed inside, the automatic exhaust valve (7) has a second card slot (19) formed inside, and the automatic exhaust valve (7) has a third card slot (20) formed inside.

7. The oil-water-gas separation device for a calibration plastic pipe pressure test machine with filtering function according to claim 6, characterized in that: Two O-rings (14) are fixedly connected to the outer wall of the valve core (16), and the outer wall of the O-ring (14) fits the inner wall of the second clamping groove (19).

8. The oil-water-gas separation device for a calibration plastic pipe pressure test machine with filtering function according to claim 7, characterized in that: The outer wall of the O-ring (14) fits with the inner wall of the third clamping groove (20), and the outer wall of the O-ring (14) fits with the inner wall of the first clamping groove (18).

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