Device for measuring relation between sliding seal pressure and leakage rate and using method thereof

Abstract

The invention discloses a device for measuring the relation between sliding seal pressure and leakage amount and a using method thereof, and relates to the technical field of management and control, the device comprises a gas transmission pipeline and a gas source connected to the input end of the gas transmission pipeline, and the gas transmission pipeline is sequentially provided with a pressure reducing valve, a sealing platform and a gas flow meter from the input end to the output end; two cavities are formed in the sealing platform, a differential pressure detector is installed on the outer side of the sealing platform, the two execution ends of the differential pressure detector are connected into the two cavities respectively, a branch pipeline is communicated with the portion, located between the pressure reducing valve and the sealing platform, of the gas conveying pipeline, and a flow dividing valve is installed on the branch pipeline. According to the testing device and method, the critical differential pressure of different sealing strips under the same deformation can be accurately measured so as to compare the sealing effects of the sealing strips, meanwhile, the critical differential pressure of the same sealing strip under the different deformation can be measured, the overall structure of the device is simple, and the method is efficient and accurate.

Description

Technical Field

[0001] The patent of this invention relates to the field of control technology, specifically a device for measuring the relationship between sliding seal pressure and leakage and a method of using the device. Background Art

[0002] In VOCs waste gas treatment technology, the current drum or wheel adsorption technology, because its adsorption and desorption are performed without valve switching, the adsorbent area is divided into adsorption zone, desorption zone and cooling zone by sliding sealing. During the continuous rotation of the adsorbent module, the system can achieve continuous adsorption and desorption, which reduces costs while maximizing the adsorption and desorption effect of the adsorbent on the exhaust gas, and has been widely used.

[0003] In a rotor or drum system, the sealing performance between various areas and between various areas and the outside world is crucial. In existing rotor or drum systems, lip seals, U-type seals and P-type seals are mostly used for sealing. Simple and efficient new seals are also one of the key research and development directions of various rotor manufacturers, and related sealing patents are emerging in an endless stream.

[0004] However, the sealing performance and leakage of various sealing forms are basically judged indirectly by experience, feeling, intuitive elastic deformation of the seal and whether the system finally meets the standard, etc. There is no simple and efficient quantitative description of the relationship between the pressure difference on both sides of the seal of the sealing structure and the leakage. The present invention proposes a test device and a test method for measuring the relationship between the sealing pressure and leakage of a rotary wheel or a rotary drum.

[0005] Invention patent content

[0006] The purpose of the present invention is to provide a device for measuring the relationship between the pressure and leakage of a sliding seal and a method of using the device to solve the problems raised in the above-mentioned background technology.

[0007] In order to solve the above technical problems, the patent of the present invention provides the following technical solutions: a device for measuring the relationship between the pressure and leakage of a sliding seal, comprising a gas source connected to a gas pipeline at the input end of the gas pipeline, a pressure reducing valve, a sealing platform and a gas flow meter are sequentially arranged on the gas pipeline from the input end to the output end, two cavities are arranged in the sealing platform, a differential pressure detector is installed on the outside of the sealing platform, and two execution ends of the differential pressure detector are respectively connected to the two cavities, and a branch pipeline is connected to the gas pipeline between the pressure reducing valve and the sealing platform, and a diverter valve is installed on the branch pipeline.

[0008] Furthermore, the sealing platform includes a shell and a sealing device for dividing the shell into two cavities, the sealing device includes a partition integrally arranged in the shell, a channel is arranged between the bottom end of the partition and the bottom end of the inner wall of the shell, a sliding plate for covering the channel and a sealing strip fixedly connected to the bottom end of the sliding plate are arranged on one side of the partition, and the sliding plate can move up and down.

[0009] Furthermore, the sliding plate and the partition are fixed by a plurality of bolts, and waist-shaped holes having the same number as the number of screws are evenly spaced on the side wall of the sliding plate, and the waist-shaped holes are used for the screws to pass through and be screwed to the partition.

[0010] Furthermore, the gas source adopts a nitrogen cylinder / air compressor, the gas released by the gas source is preferably air / nitrogen, the differential pressure detector adopts a water column differential pressure gauge / electronic micro differential pressure gauge / mechanical differential pressure gauge, the differential pressure detector is preferably a water column differential pressure gauge, the gas flow meter adopts a float flow meter / electronic flow meter, and the gas flow meter is preferably a float flow meter.

[0011] A method for using a device for measuring the relationship between pressure and leakage of a sliding seal based on the device for measuring the relationship between pressure and leakage of the sliding seal comprises the following steps:

[0012] S1: The gas source releases gas, and the gas passes through the pressure reducing valve, sealing platform and gas flow meter in sequence;

[0013] S2: Adjust the opening and closing degree of the pressure reducing valve and the diverter valve in groups to provide different pressure differences for the inlet and outlet of the sealing platform;

[0014] The method for adjusting the opening and closing degree of the pressure reducing valve and the diverter valve in groups is: gradually increasing the pressure reducing valve and reducing the opening and closing degree of the diverter valve, and the opening and closing degree of the pressure reducing valve and the diverter valve are adjusted synchronously;

[0015] S3: Record each set of pressure difference data and leakage data under each set of pressure difference data;

[0016] S4: Taking the differential pressure as the abscissa and the gas leakage per unit length of the sealing strip as the ordinate, the differential pressure leakage curves of different sealing strips under the sealing deformation condition are obtained;

[0017] S5: According to the trend of the differential pressure leakage curve, the critical differential pressure values ​​of different sealing strips are obtained to facilitate the staff to compare the sealing effects of different sealing strips and the sealing effects of sealing strips under different deformation conditions.

[0018] Preferably, in step S2, the pressure reducing valve reduces the gas pressure to 2-8 kPa, and further, the pressure reducing valve reduces the gas pressure to 5 kPa.

[0019] The beneficial effects achieved by the present invention are:

[0020] 1. Through this test device and test method, the critical differential pressure values ​​of different sealing strips under the same sealing deformation can be measured, and the sealing effects of different sealing strips can be compared. Generally speaking, the sealing device with a large critical differential pressure value has better sealing performance.

[0021] 2. Through this test device and test method, the critical differential pressure value of the same sealing strip under different sealing deformations can be measured. Generally, the greater the sealing deformation, the greater the critical differential pressure value, but the greater the friction of the sealing strip, the shorter the life, and the best sealing deformation under the conditions of use is screened out.

[0022] 3. The test device has a simple structure, and the test method is concise, efficient and accurate. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a structural schematic diagram of a device for measuring the relationship between the pressure and leakage of a sliding seal in the first embodiment;

[0024] Figure 2 It is a structural schematic diagram of the sealing platform in the first embodiment;

[0025] Figure 3 is a cross-sectional view of the sealing platform in the first embodiment;

[0026] Figure 4 This is a flow chart of a method for using a device for measuring the relationship between sliding seal pressure and leakage in Embodiment 2;

[0027] Figure 5 It is the differential pressure leakage curve. DETAILED DESCRIPTION

[0028] The present invention is further described below in conjunction with the accompanying drawings.

[0029] Embodiment 1

[0030] like Figure 1-3 As shown, the patent of the present invention discloses a device for measuring the relationship between the pressure and leakage of a sliding seal, comprising: a gas pipeline 1 connected to a gas source 2 at the input end of the gas pipeline 1, a pressure reducing valve 3, a sealing platform 4 and a gas flow meter 5 are sequentially arranged on the gas pipeline 1 from the input end to the output end, two cavities are arranged in the sealing platform 4, a differential pressure detector 6 is installed on the outer side of the sealing platform 4, two execution ends of the differential pressure detector 6 are respectively connected to the two cavities, a branch line 11 is connected to the gas pipeline 1 between the pressure reducing valve 3 and the sealing platform 4, and a diverter valve 12 is installed on the branch line 11.

[0031] Further, such as Figure 2-3As shown, the sealing platform 4 includes a shell 41 and a sealing device for dividing the shell 41 into two cavities, the sealing device includes a partition 42 integrally arranged in the shell 41, a channel 43 is arranged between the bottom end of the partition 42 and the bottom end of the inner wall of the shell 41, a sliding plate 44 for covering the channel 43 and a sealing strip 45 installed on the bottom end of the sliding plate 44 are arranged on one side of the partition 42, and the sliding plate 44 can move up and down.

[0032] Further, such as Figure 2-3 As shown, the sliding plate 44 and the partition plate 42 are fixed by multiple bolts. The side wall of the sliding plate 44 is provided with waist-shaped holes 441 with the same number as the screws at equal intervals. The waist-shaped holes 441 are used for the screws to pass through and be screwed to the partition plate 42.

[0033] Furthermore, the gas source 2 adopts a nitrogen cylinder / air compressor, and the gas released by the gas source 2 is preferably air / nitrogen. The differential pressure detector 6 adopts a water column differential pressure gauge / electronic micro differential pressure gauge / mechanical differential pressure gauge, and the differential pressure detector 6 is preferably a water column differential pressure gauge. The gas flow meter 5 adopts a float flow meter / electronic flow meter, and the gas flow meter 5 is preferably a float flow meter.

[0034] Based on the above structure, Figure 1-3 As shown, the initial state is that the pressure reducing valve 3 is closed and the diverter valve 12 is fully opened. When in use, the opening and closing degrees of the pressure reducing valve 3 and the diverter valve 12 are adjusted in groups (the opening and closing degree of the pressure reducing valve 3 is increased while the opening and closing degree of the diverter valve 12 is reduced), and the gas source 2 passes through the pressure reducing valve 3, the sealing platform 4 and the gas flow meter 5 in sequence through the gas transmission pipeline 1, and is discharged from the output end of the gas transmission pipeline 1. In this process, the differential pressure detector 6 detects the pressure difference between the two chambers after the opening and closing degree of each group of pressure reducing valves 3 and diverter valves 12 is adjusted, and displays it. At the same time, the gas flow meter 5 detects the flow rate of the gas discharged from the output end of the sealing platform 4 after the opening and closing degree of each group of pressure reducing valves 3 and diverter valves 12 is adjusted. The staff records the pressure difference data and flow data (leakage data) after the opening and closing degree of each group of pressure reducing valves 3 and diverter valves 12 is adjusted, and makes each group of pressure difference data and flow data into a curve chart, thereby obtaining the critical pressure difference value of the sealing strip;

[0035] During this process, the diverter valve 12 is used to stabilize the pressure of the gas pipeline 1 between the pressure reducing valve 3 and the sealing platform 4;

[0036] When it is necessary to further record the pressure difference data and flow data curves of the sealing strip under different deformation conditions, the staff loosens the threaded connection between the screw and the partition 42, presses down or moves up the sliding plate 44, and thereby adjusts the pressure exerted by the sliding plate 44 on the sealing strip 45, so that the sealing strip 45 produces different deformations due to the change in pressure. After the sealing strip 45 meets the deformation requirements, the screws are re-fastened to the partition 42 to complete the fixation of the sliding plate 44, so that the sealing strip 45 maintains the deformed state, and then the pressure difference data and flow data can be tested.

[0037] In order to facilitate the staff to move the sliding plate 44 up / down, the sealing platform 4 can be opened (as shown in the figure).

[0038] Embodiment 2

[0039] See also Figure 4 A method for using a device for measuring the relationship between a sliding seal pressure and a leakage amount based on the device for measuring the relationship between a sliding seal pressure and a leakage amount comprises the following steps:

[0040] S1: The gas source 2 releases gas, and the gas passes through the pressure reducing valve 3, the sealing platform 4 and the gas flow meter 5 in sequence;

[0041] S2: regulating the opening and closing degree of the pressure reducing valve 3 and the diverter valve 12 in groups to provide different pressure differences for the inlet and outlet of the sealing platform 4;

[0042] The method for adjusting the opening and closing degree of the pressure reducing valve 3 and the diverter valve 12 in groups is: gradually increasing the pressure reducing valve 3 and reducing the opening and closing degree of the diverter valve 12, and adjusting the opening and closing degree of the pressure reducing valve 3 and the diverter valve 12 is performed synchronously;

[0043] S3: Record each set of pressure difference data and leakage data under each set of pressure difference data;

[0044] S4: Taking the differential pressure as the abscissa and the gas leakage per unit length of the sealing strip as the ordinate, the differential pressure leakage curves of different sealing strips under the sealing deformation condition are obtained;

[0045] S5: According to the trend of the differential pressure leakage curve, the critical differential pressure values ​​of different sealing strips are obtained to facilitate the staff to compare the sealing effects of different sealing strips and the sealing effects of sealing strips under different deformation conditions.

[0046] Preferably, in step S2, the pressure reducing valve 3 reduces the gas pressure to 2-8 kPa, and further, the pressure reducing valve 3 reduces the gas pressure to 5 kPa.

[0047] The above are only preferred specific implementation methods of the present invention, but the protection scope of the present invention is not limited thereto. Any technician familiar with the technical field can make equivalent replacements or changes according to the technical solution and invention concept of the present invention within the technical scope disclosed by the present invention, which should be covered by the protection scope of the present invention.

Claims

1. A device for measuring the relationship between sliding seal pressure and leakage, characterized in that: The invention comprises a gas transmission pipeline (1) connected to a gas source (2) at the input end of the gas transmission pipeline (1); a pressure reducing valve (3), a sealing platform (4) and a gas flow meter (5) are arranged on the gas transmission pipeline (1) in sequence from the input end to the output end; two cavities are arranged in the sealing platform (4); a differential pressure detector (6) is installed on the outer side of the sealing platform (4); two execution ends of the differential pressure detector (6) are respectively connected to the two cavities; a branch line (11) is connected to the gas transmission pipeline (1) between the pressure reducing valve (3) and the sealing platform (4); and a diverter valve (12) is installed on the branch line (11).

2. The device for measuring the relationship between sliding seal pressure and leakage according to claim 1, characterized in that: The sealing platform (4) comprises a shell (41) and a sealing device for dividing the shell (41) into two cavities, the sealing device comprising a partition (42) integrally arranged in the shell (41), a channel (43) being arranged between the bottom end of the partition (42) and the bottom end of the inner wall of the shell (41), a sliding plate (44) for covering the channel (43) being arranged on one side of the partition (42), and a sealing strip (45) installed at the bottom end of the sliding plate (44), and the sliding plate (44) being movable up and down.

3. The device for measuring the relationship between sliding seal pressure and leakage according to claim 2, characterized in that: The sliding plate (44) and the partition plate (42) are fixed by a plurality of bolts. The side wall of the sliding plate (44) is provided with waist-shaped holes (441) at equal intervals and the same number as the number of screws. The waist-shaped holes (441) are used for the screws to pass through and be screwed to the partition plate (42).

4. The device for measuring the relationship between sliding seal pressure and leakage according to claim 3, characterized in that: The gas source (2) adopts a nitrogen cylinder / air compressor, and the gas released by the gas source (2) is preferably air / nitrogen. The differential pressure detector (6) adopts a water column differential pressure gauge / electronic micro differential pressure gauge / mechanical differential pressure gauge, and the differential pressure detector (6) is preferably a water column differential pressure gauge. The gas flow meter (5) adopts a float flow meter / electronic flow meter, and the gas flow meter (5) is preferably a float flow meter.

5. A method for using the device for measuring the relationship between the pressure and leakage of a sliding seal according to claim 4, characterized in that: The steps include: S1: The gas source (2) releases gas, and the gas passes through the pressure reducing valve (3), the sealing platform (4) and the gas flow meter (5) in sequence; S2: adjusting the opening and closing degrees of the pressure reducing valve (3) and the diverter valve (12) in groups to provide different pressure differences for the inlet and outlet of the sealing platform (4); The method for adjusting the opening and closing degrees of the pressure reducing valve (3) and the diverter valve (12) in groups is: gradually increasing the opening and closing degree of the pressure reducing valve (3) and reducing the opening and closing degree of the diverter valve (12), and adjusting the opening and closing degrees of the pressure reducing valve (3) and the diverter valve (12) are performed synchronously; S3: Record each set of pressure difference data and leakage data under each set of pressure difference data; S4: Taking the differential pressure as the abscissa and the gas leakage per unit length of the sealing strip as the ordinate, the differential pressure leakage curves of different sealing strips under the sealing deformation condition are obtained; S5: According to the trend of the differential pressure leakage curve, the critical differential pressure values ​​of different sealing strips are obtained to facilitate the staff to compare the sealing effects of different sealing strips and the sealing effects of sealing strips under different deformation conditions.

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