Tool and method for detecting damaged position of diaphragm of diaphragm pump

Abstract

The invention introduces a detection tool and a detection method for a damaged position of a diaphragm of a diaphragm pump. The detection tool comprises a sealing cover, a lining plate, a double-end bolt, a pressure gauge and a valve, the detection method comprises the specific steps of cleaning, detection tool installation, lifting inflation, detection and pressure relief. The detection tool is simple in structure and convenient to disassemble and assemble, the sealing cover and the lining plate are used in cooperation, the sealing performance of the diaphragm during detection is guaranteed, the detection tool can be used in cooperation with hoisting equipment during detection, and follow-up operation development is facilitated; by adopting a detection method of filling carbon dioxide and a litmus solution, the damage position can be quickly and accurately determined, the detection time is saved, and the detection efficiency is improved.

Description

Technical Field

[0001] The invention relates to the technical field of diaphragm pump maintenance, and in particular to a diaphragm damage position detection tool and a detection method for a diaphragm pump. Background Art

[0002] Diaphragm pumps are used in many industries due to their simple structure, convenient operation, easy maintenance and wide range of applications. The cylindrical rubber diaphragm with open ends is a key actuator and plays a vital role. In actual operation, it is often damaged due to the following reasons: 1. The gas source is not completely exhausted: the gas contains trace foreign matter, which causes the gas volume to change with the pressure of the pushing liquid, forming an air hammer effect, causing the diaphragm to be unevenly stressed and ruptured; 2. Pressure fluctuations: such as wear or leakage of the one-way valve, rupture or leakage of the pressure-stabilizing bag, etc., which may cause the pressure fluctuation of the unit to become larger, causing the diaphragm to be unevenly stressed and ruptured; 3. Propellant liquid problems: the outer propulsion medium level is too low and not added in time, too many impurities block the pipeline, and the replenishment and drainage system fails, which may cause the diaphragm to wear or rupture.

[0003] After the diaphragm is found to be damaged, it needs to be replaced. A single diaphragm is of high value. In practice, the diaphragm is usually repaired because there are two media on both sides of the diaphragm and the pressure difference on both sides is large, which has high requirements for the strength after the repair. The quality of the diaphragm after the repair can only be inspected by the naked eye. After the repaired rubber diaphragm is installed, the repair effect cannot be guaranteed. In actual production, the repaired diaphragm will be damaged again in a short time after installation. The entire diaphragm transmission system needs to be shut down and the diaphragm needs to be disassembled again, resulting in a large amount of manpower, material resources and time waste; moreover, under long-term high pressure and repeated tensile deformation, when foreign objects such as metal wire enter the transmitted slurry, it will cause minor damage to the diaphragm. Due to the material and manufacturing process of the rubber diaphragm, most of the small damage cannot be observed by the naked eye, resulting in it not being discovered during repair, and the diaphragm damage point cannot be systematically and comprehensively repaired. Summary of the invention

[0004] The purpose of the present invention is to overcome the shortcomings of the prior art and provide a diaphragm pump diaphragm damage position detection tool and detection method, which can timely and accurately judge the degree and position of damage to the rubber diaphragm, shorten the troubleshooting time, and ensure that the repaired diaphragm has good sealing and pressure resistance.

[0005] The technical solution adopted by the present invention is: A diaphragm damage position detection tool for a diaphragm pump, comprising a sealing cover, a lining plate, stud bolts, a pressure gauge and a valve; The sealing cover comprises an end plate and a mounting sleeve. The end plate is an oval-shaped plate. A plurality of connection holes are evenly arranged around the upper edge of the plate surface of the end plate. The connection holes correspond to the flange holes at the end of the diaphragm to be inspected. The mounting sleeve is an oval-shaped structure matching the end plate. The mounting sleeve is arranged on the center of the inner side surface of the end plate inside the connection hole. The outer diameter of the mounting sleeve matches the caliber of the diaphragm to be inspected. The liner is a segmented oval ring plate matching the end plate, and is provided with holes corresponding to the connection holes on the end plate; stud bolts pass through the end plate, the diaphragm and the liner respectively, and the sealing covers are respectively installed on both ends of the diaphragm; The pressure gauge and the valve are arranged on the end plate of the sealing cover at one end of the diaphragm.

[0006] Specifically, a lifting lug is arranged on the end plate of the sealing cover.

[0007] Specifically, the lining plate is of two sections, and the sections are respectively located at the opposite end points of the two ends of the waist circle.

[0008] A method for detecting the damaged position of a diaphragm of a diaphragm pump, comprising the following specific steps: Step 1: Cleaning: Use a high-pressure water gun and a brush to clean the inside and outside of the rubber diaphragm to be tested to remove scale and oil on the surface of the diaphragm; Step 2: Install the inspection tooling: Press the port of the diaphragm to be inspected to a flat shape and put the diaphragm on the installation sleeve of the sealing cover, adjust the flange hole on the diaphragm port to correspond to the installation hole on the end plate, place the two liner plates on the rear side of the diaphragm port flange, use stud bolts to pass through the corresponding sealing cover, diaphragm and liner plates respectively, and tighten them with nuts to ensure the sealing of the diaphragm and the sealing cover. After all bolts and nuts are installed, install the sealing cover on the other port of the diaphragm in the same way as above. During installation, ensure that the sealing covers at both ends are in the same position and the diaphragm is straight and not twisted; Step 3: Lift and inflate: Use the lifting hook of the lifting equipment to cooperate with the lifting ears on the sealing covers at both ends to lift the entire diaphragm, connect the inflation pipe of the air pump to the joint of the valve set on the sealing cover, open the valve handle, start the air pump, fill the diaphragm with carbon dioxide, and observe the pressure gauge display. When the pressure in the diaphragm rises to 0.5-0.8Mpa, close the valve; disconnect the connection between the inflation pipe of the air pump and the valve; Step 4. Test: Choose paper with good water absorption and smooth surface, and immerse the paper in 0.5-0.8% litmus solution for 4 to 5 minutes; stick the soaked paper on the inflated diaphragm to ensure that the paper fits tightly to the diaphragm without bubbles or gaps; wait for 5 to 10 minutes and observe the color change of the paper. The paper at the damaged part of the diaphragm will come into contact with the leaked carbon dioxide and turn red, and mark the damaged part immediately; Step 5. Pressure relief: After the detection marking is completed, open the valve and start pressure relief. Keep the ventilation environment during pressure relief. After the pressure relief is completed, disassemble the detection tooling and repair the marked parts. After the repair, repeat steps 1 to 5 again to confirm the repair results.

[0009] Specifically, in the step 1, during the first inspection, after cleaning is completed, a visual inspection is first performed, and obvious damage is repaired. After the obvious damage is repaired, step 2 is performed.

[0010] Specifically, in the step 1, before cleaning, the end flange of the diaphragm to be tested is polished and smoothed to ensure that there are no burrs and foreign matter; and the sealing performance of the testing tooling is ensured after installation.

[0011] Specifically, in step 5, the detection environment temperature does not exceed 27° C. to avoid the temperature affecting the detection result.

[0012] Due to the adoption of the above-mentioned technical solution, the present invention has the following advantages: The detection tooling of the present invention has a simple structure and is easy to assemble and disassemble. The sealing cover and the lining plate are used in combination to ensure the sealing of the diaphragm during detection. During detection, the tooling can be used in combination with a lifting device to facilitate subsequent operations. The detection method of filling with carbon dioxide and litmus solution can quickly and accurately determine the damage position, save detection time, and improve detection efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is an overall schematic diagram of the present invention when in use.

[0014] Figure 2 It is an overall schematic diagram of the detection tooling and the diaphragm of the present invention.

[0015] Figure 3 It is a schematic diagram of a sealing cover provided with a pressure gauge and a valve according to the present invention.

[0016] Figure 4 yes Figure 3 Schematic diagram of the top view.

[0017] Figure 5 It is a bottom view schematic diagram of the sealing cover at the other end of the present invention.

[0018] Figure 6 It is a structural schematic diagram of the liner of the present invention.

[0019] Figure 7 is a schematic diagram of the diaphragm of the present invention.

[0020] In the figure: 1-sealing cover, 11-end plate, 12-mounting sleeve, 13-lifting ear, 2-lining plate, 3-stud bolt, 4-pressure gauge, 5-valve, 6-lifting equipment, 7-air pump, 8-diaphragm. DETAILED DESCRIPTION

[0021] The present invention will be further explained below in conjunction with the accompanying drawings and embodiments, which should not be used to limit the protection scope of the present invention. The purpose of disclosing the present invention is to protect all technical improvements within the scope of the present invention.

[0022] Combined with Figure 1-7 The diaphragm damage position detection tool for a diaphragm pump shown in the figure includes a sealing cover 1, a liner 2, stud bolts 3, a pressure gauge 4 and a valve 5.

[0023] The sealing cover 1 includes an end plate 11 and a mounting sleeve 12. The end plate 11 is an oval plate. A plurality of connecting holes are evenly arranged along the plate surface of the end plate 11. The connecting holes correspond to the flange holes at the ends of the diaphragm 8 to be inspected. A lifting ear 13 is arranged on the outer side of the end plate 11. The mounting sleeve 12 is an oval structure matching the end plate 11. The mounting sleeve 12 is arranged on the center of the inner side surface of the end plate 11 inside the connecting hole. The outer diameter of the mounting sleeve 12 matches the caliber of the diaphragm 8 to be inspected.

[0024] The liner 2 is a two-section oval circular ring plate that matches the end plate 11. The segmentation is located at the end points of the two circular ends of the oval circular shape. The liner 2 is provided with holes corresponding to the connecting holes on the end plate 11; the stud bolts 3 pass through the end plate 11, the diaphragm 8 and the liner 2 respectively, and the sealing cover 1 is installed on the two ends of the diaphragm 8 respectively.

[0025] The pressure gauge 4 and the valve 5 are arranged on the end plate 11 of the sealing cover 1 at one end of the diaphragm 8 .

[0026] A method for detecting the damaged position of a diaphragm of a diaphragm pump, comprising the following specific steps: Step 1, cleaning: Before cleaning, grind and smooth the end flange of the diaphragm 8 to be tested to make sure there are no burrs or foreign matter; ensure the sealing of the testing tooling after installation; use a high-pressure water gun and a brush to clean the inside and outside of the rubber diaphragm 8 to be tested to remove scale and oil on the surface of the diaphragm 8; perform a visual inspection first and repair any obvious damage. After the obvious damage is repaired, proceed to step 2.

[0027] Step 2: Installation of inspection tooling: press the port of the diaphragm 8 to be inspected into a flat shape and put the diaphragm 8 on the mounting sleeve 12 of the sealing cover 1, adjust the flange hole on the port of the diaphragm 8 to correspond to the mounting hole on the end plate 11, place the two sections of lining plates 2 correspondingly on the rear side of the flange of the port of the diaphragm 8, use the stud bolts 3 to pass through the corresponding sealing cover 1, diaphragm 8 and lining plate 2 respectively, and tighten them with nuts to ensure the sealing of the diaphragm 8 and the sealing cover 1. After all the bolts and nuts are installed, install the sealing cover 1 on the other port of the diaphragm 8 in the above manner. During installation, ensure that the positions of the sealing covers 1 at both ends correspond and the diaphragm 8 is straight and not twisted.

[0028] Step 3, lifting and inflating: use the lifting hook of the lifting device 6 to cooperate with the lifting ears 13 on the sealing covers 1 at both ends to lift the entire diaphragm 8, connect the inflation pipe of the air pump 7 to the joint of the valve 5 set on the sealing cover 1, open the valve 5 handle, start the air pump 7, fill the diaphragm 8 with carbon dioxide, and observe the display of the pressure gauge 4. When the pressure in the diaphragm 8 rises to 0.5-0.8Mpa, close the valve 5; disconnect the connection between the inflation pipe of the air pump 7 and the valve 5.

[0029] Step 4, detection: select paper with good water absorption and smooth surface, immerse the paper in litmus solution with a concentration of 0.5-0.8% for 4 to 5 minutes; stick the soaked paper on the inflated diaphragm 8 to ensure that the paper fits tightly to the diaphragm 8 without bubbles or gaps; wait for 5 to 10 minutes and observe the color change of the paper. The paper at the damaged part of the diaphragm 8 will come into contact with the leaked carbon dioxide and turn red, and mark the damaged part immediately.

[0030] Step 5, pressure relief: After the detection mark is completed, open valve 5 and start pressure relief. Keep the environment ventilated during pressure relief and the ambient temperature should not exceed 27°C. After the pressure relief is completed, disassemble the detection tooling and repair the marked parts. After the repair, repeat steps 1 to 5 again to confirm the repair results.

[0031] The parts not described in detail in this invention are prior art.

[0032] The embodiments selected herein for the purpose of disclosing the invention are currently considered to be suitable, but it should be understood that the invention is intended to include all changes and modifications of the embodiments that fall within the scope of the concept and invention.

Claims

1. A diaphragm pump diaphragm damage position detection tool, characterized in that: Includes sealing cover, liner, stud bolts, pressure gauge and valve; The sealing cover comprises an end plate and a mounting sleeve. The end plate is an oval-shaped plate. A plurality of connection holes are evenly arranged around the upper edge of the plate surface of the end plate. The connection holes correspond to the flange holes at the end of the diaphragm to be inspected. The mounting sleeve is an oval-shaped structure matching the end plate. The mounting sleeve is arranged on the center of the inner side surface of the end plate inside the connection hole. The outer diameter of the mounting sleeve matches the caliber of the diaphragm to be inspected. The liner is a segmented oval ring plate matching the end plate, and is provided with holes corresponding to the connection holes on the end plate; stud bolts pass through the end plate, the diaphragm and the liner respectively, and the sealing covers are respectively installed on both ends of the diaphragm; The pressure gauge and the valve are arranged on the end plate of the sealing cover at one end of the diaphragm.

2. The diaphragm damage position detection tool for a diaphragm pump according to claim 1, characterized in that: The end plate of the sealing cover is provided with a lifting ear.

3. The diaphragm damage position detection tool for a diaphragm pump according to claim 1, characterized in that: The lining plate is of two sections, and the sections are respectively located at the opposite end points of the two ends of the waist circle.

4. A detection method using the diaphragm damage position detection tooling of a diaphragm pump according to any one of claims 1 to 3, characterized in that: The specific steps are: Step 1: Cleaning: Use a high-pressure water gun and a brush to clean the inside and outside of the rubber diaphragm to be tested to remove scale and oil on the surface of the diaphragm; Step 2: Install the inspection tooling: Press the port of the diaphragm to be inspected to a flat shape and put the diaphragm on the installation sleeve of the sealing cover, adjust the flange hole on the diaphragm port to correspond to the installation hole on the end plate, place the two liner plates on the rear side of the diaphragm port flange, use stud bolts to pass through the corresponding sealing cover, diaphragm and liner plates respectively, and tighten them with nuts to ensure the sealing of the diaphragm and the sealing cover. After all bolts and nuts are installed, install the sealing cover on the other port of the diaphragm in the same way as above. During installation, ensure that the sealing covers at both ends are in the same position and the diaphragm is straight and not twisted; Step 3: Lift and inflate: Use the lifting hook of the lifting equipment to cooperate with the lifting ears on the sealing covers at both ends to lift the entire diaphragm, connect the inflation pipe of the air pump to the joint of the valve set on the sealing cover, open the valve handle, start the air pump, fill the diaphragm with carbon dioxide, and observe the pressure gauge display. When the pressure in the diaphragm rises to 0.5-0.8Mpa, close the valve; disconnect the connection between the inflation pipe of the air pump and the valve; Step 4. Test: Choose paper with good water absorption and smooth surface, and immerse the paper in 0.5-0.8% litmus solution for 4 to 5 minutes; stick the soaked paper on the inflated diaphragm to ensure that the paper fits tightly to the diaphragm without bubbles or gaps; wait for 5 to 10 minutes and observe the color change of the paper. The paper at the damaged part of the diaphragm will come into contact with the leaked carbon dioxide and turn red, and mark the damaged part immediately; Step 5. Pressure relief: After the detection marking is completed, open the valve and start pressure relief. Keep the ventilation environment during pressure relief. After the pressure relief is completed, disassemble the detection tooling and repair the marked parts. After the repair, repeat steps 1 to 5 again to confirm the repair results.

5. The method for detecting the damaged position of a diaphragm of a diaphragm pump according to claim 4, characterized in that: In the step 1, during the first inspection, after cleaning, a visual inspection is first performed, and obvious damage is repaired. After the obvious damage is repaired, step 2 is performed.

6. The method for detecting the damaged position of a diaphragm of a diaphragm pump according to claim 4, characterized in that: In the step 1, before cleaning, the end flange of the diaphragm to be inspected is polished and smoothed to ensure that there are no burrs or foreign matter.

7. The method for detecting the damaged position of a diaphragm of a diaphragm pump according to claim 4, characterized in that: In the step 5, the detected ambient temperature does not exceed 27°C.

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