Inner wall air groove steel pipe sealing detection device for pneumatic conveying

Abstract

The utility model relates to the field of detection devices, in particular to an inner wall gas groove steel pipe sealing detection device for pneumatic transmission, which comprises a steel pipe clamping plate, a gas-tight gas tank and a sealing gas injection assembly, one side of a steel pipe clamping and fixing plate is communicated with an airtight gas tank, a sealing gas injection assembly is installed in the steel pipe clamping and fixing plate, a secondary sealing ring is installed on the inner wall of a gas inlet sealing block, the center of the gas inlet sealing block is communicated with a gas injection pipe, push rods are symmetrically welded to the outer portion of a sealing connecting block, and an air cylinder is installed at one end of each push rod. The piston end of the air cylinder is connected to the push rod, a first-stage sealing ring is arranged at the end, away from the push rod, of the sealing connecting block, and when the air cylinder pushes the sealing connecting block to be close to the steel pipe, the first-stage sealing ring firstly plays a role to preliminarily block the path of gas leaking from a port of the steel pipe; the device can be tightly attached to an air groove in the inner wall of the steel pipe, and air is prevented from reversely leaking from an air inlet part.

Description

Technical Field

[0001] This utility model relates to the field of testing devices, and in particular to a testing device for the sealing of steel pipes with inner wall air grooves used in pneumatic conveying. Background Technology

[0002] The pneumatic conveying inner wall grooved steel pipe sealing test device is a device specifically used to test the sealing performance of steel pipes with air grooves on the inner wall in pneumatic conveying systems. The core function of this device is to test the sealing performance of steel pipes with air grooves on the inner wall during the pneumatic conveying process. In pneumatic conveying systems, the sealing performance of steel pipes is crucial. If the steel pipe is not sealed tightly, it may lead to leakage of conveyed materials, which will not only cause material waste, but may also affect the normal operation of the entire conveying system, and even cause safety accidents.

[0003] Currently, most devices on the market used for testing the sealing of similar steel pipes adopt a single sealing structure. In actual operation, the sealing structure is somewhat complex, the operation process is cumbersome, and multiple steps and complex adjustments are required to achieve a good sealing effect. Moreover, the sealing effect achieved by a single sealing structure is not ideal. In some cases, problems such as incomplete sealing and gas leakage may occur, thereby affecting the accuracy and reliability of the test results.

[0004] Therefore, addressing the issues that many similar steel pipe sealing detection devices currently on the market employ a single sealing structure, resulting in complex and cumbersome operation requiring multiple steps and adjustments to achieve satisfactory results, and often exhibiting unsatisfactory sealing effects such as incomplete sealing and gas leakage, thus affecting the accuracy and reliability of the detection results, a pneumatic conveying steel pipe sealing detection device with an inner wall air groove can be designed. This device incorporates a double sealing structure with a primary and secondary sealing ring in the sealing and injection assembly. The primary sealing ring is located at the contact point between the sealing connecting block and the steel pipe end. When the cylinder pushes the sealing connecting block closer to the steel pipe, the primary sealing ring takes effect first, using its good elasticity and fit to initially block the path of gas leakage from the steel pipe end. The secondary sealing ring is installed on the inner wall of the air inlet sealing block, surrounding the injection pipe. When gas is injected, it tightly fits the air groove on the inner wall of the steel pipe, preventing gas from leaking back from the air inlet. Utility Model Content

[0005] To overcome the problems that many similar steel pipe sealing testing devices on the market currently use a single sealing structure, which is complicated and cumbersome to operate, requiring multiple steps and complex adjustments to achieve good results, and whose sealing effect is not ideal, and may result in incomplete sealing, gas leakage and other problems, thus affecting the accuracy and reliability of the test results.

[0006] The technical solution of this utility model is as follows: a sealing detection device for steel pipes with inner wall air grooves for pneumatic conveying, comprising a steel pipe clamping plate, an airtight gas tank, and a sealing gas injection assembly; an airtight gas tank for providing gas for testing airtightness is connected and installed on one side of the steel pipe clamping plate, and a sealing gas injection assembly for airtightening the steel pipe is installed inside the steel pipe clamping plate. The sealing gas injection assembly includes an air inlet sealing block and a sealing connection block. A secondary sealing ring is installed on the inner wall of the air inlet sealing block, and a gas injection pipe is connected to the center of the air inlet sealing block. Push rods are symmetrically welded and installed on the outside of the sealing connection block. A cylinder is installed at one end of the push rod, and the piston end of the cylinder is connected to the push rod. A primary sealing ring is provided at the end of the sealing connection block away from the push rod.

[0007] Preferably, firstly, the steel pipe to be tested is placed on the steel pipe clamping plate and fixed in place. Then, the cylinder is started, and the piston of the cylinder pushes the push rod, thereby moving the sealing connecting block towards the steel pipe. The primary sealing ring at one end of the sealing connecting block first contacts the opening of the steel pipe to achieve a preliminary seal. Next, the air inlet sealing block continues to move under the push rod, so that the secondary sealing ring also makes tight contact with the opening of the steel pipe, further enhancing the sealing effect. At this time, the airtightness testing gas provided by the airtight gas tank is injected into the inside of the steel pipe through the gas injection pipe. By observing the change in gas pressure or detecting whether there is a gas leak, it is determined whether the sealing performance of the steel pipe meets the requirements.

[0008] Preferably, two sets of sliding rods are slidably installed on one side of the steel pipe clamping plate, and an adjusting clamping plate is installed at one end of each set of sliding rods. Both the adjusting clamping plate and the steel pipe clamping plate are equipped with two sets of rear baffles.

[0009] Preferably, two sets of air pressure sensors are linearly mounted on one end of each of the two sets of rear baffles. A power supply is installed on one set of rear baffles away from the air pressure sensors, and a mounting slot for installing the power supply is provided on one set of rear baffles.

[0010] Preferably, a control console is installed on the steel pipe clamping plate away from the rear baffle, an air inlet is opened at the top of the steel pipe clamping plate near one side edge, a sliding hole is symmetrically opened through one side of the clamping plate, and a support column is installed at the top of the steel pipe clamping plate below the air inlet.

[0011] Preferably, a handle is installed on the outer side of the adjusting clamp plate, away from the rear baffle, near one edge.

[0012] Preferably, a fluorescent light is installed at the top of the support column, and a rotating shaft is installed between the fluorescent light and the support column.

[0013] Preferably, a three-way connector is installed on one side of the airtight gas tank, a pressure regulating valve is installed at the top of the three-way connector, a fluorescent gas tank is spirally installed on the outside of the three-way connector, and an air inlet pipe is installed at the center of one side of the three-way connector.

[0014] The beneficial effects of this invention are as follows: This device features a carefully designed double-sealing structure with a primary sealing ring and a secondary sealing ring in the sealing and injection assembly. The primary sealing ring is located at the contact point between the sealing connecting block and the steel pipe end. When the cylinder pushes the sealing connecting block closer to the steel pipe, the primary sealing ring takes effect first, using its good elasticity and fit to initially block the path of gas leakage from the steel pipe end. The secondary sealing ring is installed on the inner wall of the inlet sealing block, surrounding the injection pipe. When gas is injected, it can tightly fit the gas groove on the inner wall of the steel pipe, preventing gas from leaking back from the inlet. Compared with the single sealing structure of existing technologies, the double sealing ring greatly enhances the reliability of the seal. When facing the complex inner wall contour and gaps of the steel pipe with gas grooves, it can effectively fill any possible leakage gaps, ensuring the gas flow during the testing process. The gas is strictly confined inside the steel pipe, reducing the risk of gas leakage due to poor sealing and ensuring the stability of the test pressure. This lays a solid foundation for accurately judging the sealing performance of the steel pipe. A cylinder is used as the power source to drive the sealing block. The piston stroke and thrust of the cylinder can be precisely controlled through the control panel. The push rods symmetrically welded to the outside of the sealing block stably transmit the linear motion of the cylinder, ensuring that the primary sealing ring at one end of the sealing block fits evenly and tightly against the end of the steel pipe. This precisely controlled sealing method achieves an extremely high level of fit between the sealing block and the end of the steel pipe, ensuring uniform distribution of sealing pressure and effectively avoiding the problem of local poor sealing. Compared with the manual sealing method, it not only has a better sealing effect but can also adapt to steel pipes with internal gas grooves of different diameters and wall thicknesses. Attached Figure Description

[0015] Figure 1 The diagram shown is a schematic representation of the overall structure of the pneumatic conveying inner wall air groove steel pipe sealing detection device of this utility model.

[0016] Figure 2 The diagram shown is a schematic representation of the structure of the air inlet pipe of the pneumatic conveying inner wall air groove steel pipe sealing detection device of this utility model.

[0017] Figure 3 The diagram shows the structure of the sealing connection block of the pneumatic conveying inner wall air groove steel pipe sealing detection device of this utility model.

[0018] Figure 4 The diagram shows the structural design of the support column for the pneumatic conveying inner wall air groove steel pipe sealing detection device of this utility model.

[0019] Explanation of reference numerals in the attached drawings: 1. Steel pipe clamping plate; 2. Airtight gas cylinder; 101. Adjustable clamping plate; 102. Rear baffle; 103. Power supply; 104. Slide rod; 105. Pressure sensor; 106. Slide hole; 107. Handle; 108. Air inlet; 109. Support column; 110. Fluorescent lighting lamp; 111. Rotating shaft; 112. Control console; 201. Three-way connector; 202. Pressure regulating valve; 203. Fluorescent gas cylinder; 204. Air inlet pipe; 301. Cylinder; 302. Push rod; 303. Sealing connection block; 304. Primary sealing ring; 305. Secondary sealing ring; 306. Air inlet sealing block; 307. Gas injection pipe. Detailed Implementation

[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0021] Please see Figures 1-4 This utility model provides an embodiment of a gas-sealed steel pipe sealing detection device for pneumatic conveying, comprising a steel pipe clamping plate 1, a gas-tight gas tank 2, and a sealing gas injection assembly; a gas-tight gas tank 2 for providing gas for testing airtightness is connected and installed on one side of the steel pipe clamping plate 1; a sealing gas injection assembly for airtightening the steel pipe is installed inside the steel pipe clamping plate 1, the sealing gas injection assembly including an inlet sealing block 306 and a sealing connecting block 303; a secondary sealing ring 305 is installed on the inner wall of the inlet sealing block 306; a gas injection pipe 307 is connected to the center of the inlet sealing block 306; push rods 302 are symmetrically welded and installed on the outside of the sealing connecting block 303; a cylinder 301 is installed at one end of the push rod 302; the piston end of the cylinder 301 is connected to the push rod 302; and the sealing connecting block 303 is located away from the push rod 302. One end of rod 302 is equipped with a primary sealing ring 304. First, the steel pipe to be tested is placed on the steel pipe clamping plate 1 and fixed. Then, cylinder 301 is started. The piston of cylinder 301 pushes push rod 302, thereby driving sealing connection block 303 to move towards the steel pipe. The primary sealing ring 304 at one end of sealing connection block 303 first contacts the steel pipe opening to achieve initial sealing. Then, the air inlet sealing block 306 continues to move under the push of push rod 302, so that the secondary sealing ring 305 also makes tight contact with the steel pipe opening to further enhance the sealing effect. At this time, the airtightness test gas provided by airtight gas tank 2 is injected into the steel pipe through gas injection pipe 307. By observing the change in gas pressure or detecting whether there is gas leakage, it is determined whether the sealing performance of the steel pipe meets the requirements.

[0022] Please see Figures 2-3In this embodiment, two sets of sliding rods 104 are slidably installed on one side of the steel pipe clamping plate 1. An adjusting clamping plate 101 is installed at one end of each set of sliding rods 104. Two sets of rear baffles 102 are installed on both the adjusting clamping plate 101 and the outside of the steel pipe clamping plate 1. The two sets of sliding rods 104 slidably installed on one side of the steel pipe clamping plate 1, and the adjusting clamping plate 101 installed at one end of each sliding rod 104, can be flexibly adjusted in position according to the diameter of the steel pipe, thereby adapting to steel pipes of different specifications and improving the versatility of the device. The adjusting clamping plate 101 and the two sets of rear baffles 102 installed on the outside of the steel pipe clamping plate 1 can block and fix the steel pipe from multiple directions, ensuring that the steel pipe will not shift during the testing process. To ensure the accuracy and stability of the test, two sets of air pressure sensors 105 are linearly mounted on one end of each of the two sets of rear baffles 102. A power supply 103 is installed on one set of rear baffles 102 away from the air pressure sensors 105. One set of rear baffles 102 has a mounting slot for installing the power supply 103. The two sets of air pressure sensors 105 linearly mounted on one end of the two sets of rear baffles 102 can detect the air pressure changes at various positions of the steel pipe in real time and accurately, thereby more comprehensively and accurately judging the sealing performance of the steel pipe. The power supply 103 installed on one set of rear baffles 102 provides stable power support for the air pressure sensors 105 and other testing equipment, ensuring the smooth progress of the test.

[0023] Please see Figures 3-4 In this embodiment, a control console 112 is installed on the steel pipe clamping plate 1 away from the rear baffle 102. An air inlet 108 is opened at the top of the steel pipe clamping plate 1 near one side edge. A sliding hole 106 is symmetrically opened through one side of the adjusting clamping plate 101. A support column 109 is installed at the top of the steel pipe clamping plate 1 below the air inlet 108. The control console 112 installed on the steel pipe clamping plate 1 away from the rear baffle 102 facilitates the operator to centrally control the various parameters and operations of the entire sealing detection device, improving work efficiency and convenience. The air inlet 108 opened at the top of the steel pipe clamping plate 1 near one side edge The system provides a clear channel for the injection of airtight gas, making the air intake process smoother and more efficient. A handle 107 is installed on the outer side of the adjusting clamping plate 101, away from the rear baffle 102, near one side edge. The handle 107 installed on the outer side of the adjusting clamping plate 101 allows the operator to manually pull or push the adjusting clamping plate 101 to adjust its position, making the operation easier and more convenient. The support column 109 installed below the air inlet 108 at the top of the steel pipe clamping plate 1 can provide support for the upper structure, enhance the structural stability of the entire device, and ensure that it will not deform or be damaged due to uneven force during the testing process.

[0024] Please see Figures 3-4In this embodiment, a fluorescent lamp 110 is installed at the top of the support column 109, and a rotating shaft 111 is installed through the fluorescent lamp 110 and the support column 109. The fluorescent lamp 110 installed at the top of the support column 109 can provide sufficient light to the working area during the detection operation, which is convenient for the operator to observe and operate, and improves the accuracy and efficiency of the detection. The rotating shaft 111 installed through the fluorescent lamp 110 and the support column 109 allows the lamp to be flexibly adjusted according to actual needs, ensuring that the light can accurately illuminate the required position and meet different lighting needs. A three-way connector 201 is connected to one side of the airtight gas tank 2, and a pressure regulating valve 202 is connected to the top of the three-way connector 201. The external spiral mounts a fluorescent gas canister 203. An air inlet pipe 204 is connected to the center of one side of the three-way connector 201. The three-way connector 201 connected to one side of the airtight gas canister 2 enables multi-directional connection between the airtight gas canister 2 and other components, facilitating the simultaneous connection of different functional components, improving the system's integration and ease of use. The pressure regulating valve 202 connected to the top of the three-way connector 201 can precisely adjust the output pressure of the airtight gas to meet the pressure requirements of different steel pipe sealing tests, ensuring the accuracy and reliability of the test results. The fluorescent gas canister 203 externally spiral mounts the three-way connector 201, which can replenish special fluorescent gas when needed for detecting minute leaks. Furthermore, the fluorescent gas is easy to observe, allowing for more sensitive detection of leak points.

[0025] During operation, first place the entire device in a suitable work area, ensuring it is stable. Adjust the handle 107 on the clamping plate 101 to slide it along the slide rod 104 onto the steel pipe clamping plate 1. Adjust the distance between the clamping plate 101 and the steel pipe clamping plate 1 according to the outer diameter of the steel pipe to be tested, ensuring the steel pipe is securely clamped between them. The two sets of rear baffles 102 provide auxiliary positioning and support, completing the clamping operation of the steel pipe and preparing for subsequent testing. Check if the gas level in the airtight gas tank 2 is sufficient and confirm that the pressure regulating valve 202 is closed. If fluorescent gas is needed for testing to more intuitively check for leaks, then... The body tank 203 is spirally mounted on the three-way connector 201, connecting it to the airtight gas tank 2. Simultaneously, ensure that the power supply 103 is connected to power the various electrical components of the device, such as the pressure sensor 105 and the fluorescent lamp 110. Open the valve of the airtight gas tank 2; gas first enters the three-way connector 201. The operator adjusts the gas pressure to a preset value suitable for detecting the steel pipe by adjusting the pressure regulating valve 202. After adjusting the pressure, the gas enters the sealing gas injection assembly through the inlet pipe 204 and the inlet hole 108 at the top of the steel pipe clamping plate 1. The cylinder 301 is activated, and the piston pushes the push rod 302 outward, causing the sealing connecting block 303 to move towards the steel pipe end, causing the primary sealing ring 304 at one end of the sealing connecting block 303 to... The gas seal is initially sealed by a tight fit between the gas pipe and the steel pipe end. Then, gas enters the inlet sealing block 306 through the injection pipe 307. With further sealing by the secondary sealing ring 305, the gas is stably injected into the steel pipe, gradually filling it with pressurized gas and creating a detectable airtight environment. After the steel pipe is filled with gas, the pressure sensors 105, linearly mounted at one end of the two sets of rear baffles 102, begin real-time monitoring of the pressure at both ends and around the steel pipe. The pressure sensors 105 transmit the detected pressure data to the control console 112 in real time. The data processing system within the control console 112 analyzes and compares this data to determine whether the pressure is stable within a preset range and whether there are any abnormal pressure changes, thereby inferring... To check the sealing performance of the broken steel pipe, if gas from fluorescent gas cylinder 203 is used, operators can visually inspect the area around the device for leaks of fluorescent gas to aid in assessing the sealing condition. During the entire testing process, especially in low-light conditions, the fluorescent lamp 110 can be rotated as needed. Since the fluorescent lamp 110 is connected to the support column 109 via a rotating shaft 111, the lighting angle can be flexibly adjusted, allowing operators to clearly observe the status of each component, view the data displayed by the pressure sensor 105, and check for signs of gas leakage. After testing, first close the valve of the airtight gas cylinder 2, then operate the control panel 112 to retract the piston of cylinder 301.This causes the sealing connection block 303 and other components to return to their original position, releasing the gas inside the steel pipe. Afterwards, the adjusting clamping plate 101 can be loosened, and the tested steel pipe can be removed to prepare for the sealing test of the next steel pipe.

[0026] Through the above steps, firstly, the steel pipe to be tested is placed on the steel pipe clamping plate 1 and fixed. Then, the cylinder 301 is started, and the piston of the cylinder 301 pushes the push rod 302, thereby driving the sealing connecting block 303 to move towards the steel pipe. The primary sealing ring 304 at one end of the sealing connecting block 303 first contacts the steel pipe opening to achieve a preliminary seal. Next, the air inlet sealing block 306 continues to move under the push of the push rod 302, so that the secondary sealing ring 305 also makes tight contact with the steel pipe opening, further enhancing the sealing effect. At this time, the airtightness testing gas provided by the airtight gas tank 2 is injected into the steel pipe through the gas injection pipe 307. By observing the change in gas pressure or detecting whether there is gas leakage, it is determined whether the sealing performance of the steel pipe meets the requirements.

Claims

1. A sealing detection device for an inner wall air-grooved steel pipe used for pneumatic conveying, comprising a steel pipe clamping plate (1); characterized in that: It also includes an airtight gas tank (2) and a sealing gas injection assembly; an airtight gas tank (2) for providing gas for testing airtightness is connected to one side of the steel pipe clamping plate (1), and a sealing gas injection assembly for airtightening the steel pipe is installed inside the steel pipe clamping plate (1). The sealing gas injection assembly includes an air inlet sealing block (306) and a sealing connecting block (303). A secondary sealing ring (305) is installed on the inner wall of the air inlet sealing block (306), and a gas injection pipe (307) is connected to the center of the air inlet sealing block (306). A push rod (302) is symmetrically welded to the outside of the sealing connecting block (303). A cylinder (301) is installed at one end of the push rod (302), and the piston end of the cylinder (301) is connected to the push rod (302). A primary sealing ring (304) is provided at the end of the sealing connecting block (303) away from the push rod (302).

2. The pneumatic conveying inner wall air groove steel pipe sealing detection device according to claim 1, characterized in that: Two sets of sliding rods (104) are slidably installed on one side of the steel pipe clamping plate (1). An adjusting clamping plate (101) is installed at one end of each set of sliding rods (104). Two sets of rear baffles (102) are installed on the outside of both the adjusting clamping plate (101) and the steel pipe clamping plate (1).

3. The pneumatic conveying inner wall air groove steel pipe sealing detection device according to claim 2, characterized in that: Two sets of air pressure sensors (105) are linearly mounted on one end of each of the two sets of rear baffles (102). A power supply (103) is installed on one set of rear baffles (102) away from the air pressure sensor (105). One set of rear baffles (102) has a mounting slot for mounting the power supply (103).

4. The pneumatic conveying inner wall air groove steel pipe sealing detection device according to claim 2, characterized in that: A control panel (112) is installed on the steel pipe clamping plate (1) away from the rear baffle (102). An air inlet (108) is opened at the top of the steel pipe clamping plate (1) near one side edge. A sliding hole (106) is symmetrically opened on one side of the adjusting clamping plate (101). A support column (109) is installed at the top of the steel pipe clamping plate (1) below the air inlet (108).

5. The pneumatic conveying inner wall air groove steel pipe sealing detection device according to claim 2, characterized in that: A handle (107) is installed on one side edge of the adjusting clamping plate (101) away from the rear baffle (102).

6. The pneumatic conveying inner wall air groove steel pipe sealing detection device according to claim 5, characterized in that: A fluorescent lamp (110) is installed at the top of the support column (109), and a rotating shaft (111) is installed between the fluorescent lamp (110) and the support column (109).

7. The pneumatic conveying inner wall air groove steel pipe sealing detection device according to claim 1, characterized in that: A three-way connector (201) is connected to one side of the airtight gas tank (2), a pressure regulating valve (202) is connected to the top of the three-way connector (201), a fluorescent gas tank (203) is spirally installed on the outside of the three-way connector (201), and an air inlet pipe (204) is connected to the center of one side of the three-way connector (201).

Images