Elbow waterless pressing air tightness detection device
By designing an adjustable sliding and rotating structure and a double-layer sealing structure, the problem of insufficient detection accuracy and small application range in the prior art is solved, and reliable detection of elbows of different angles and sizes and identification of seal ring wear is achieved.
Patent Information
- Application Number
- CN202510654722.7
- Authority / Receiving Office
- CN · China
- Patent Type
- Applications(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-21
- Publication Date
- 2025-08-26
AI Technical Summary
The existing elbow waterless compression airtightness detection devices have insufficient detection accuracy and small application range, so they cannot adapt to elbows of different angles and sizes, and the seals are prone to wear and cause detection failure.
A detection device including a base, a workbench, a sliding structure, a rotating structure and a clamping structure is designed. The angle and distance between the movable plug and the fixed seat are adjusted through the sliding structure and the rotating structure, and the elbow detection of different angles and lengths is adapted to the movable plug and the fixed seat. A double-layer sealing structure is set up in the movable plug and the fixed seat, and the wear of the sealing ring is detected by using a pressure sensor.
It improves the scope of application and detection accuracy of the detection device, can identify wear of the sealing ring, and ensures the reliability and safety of the detection.
Smart Images
Figure CN120538765A_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of pipe fitting detection, in particular to an elbow air tightness detection device without water pressure testing. Background Art
[0002] Pressed elbow, also known as stamped elbow or seamless elbow, is usually divided into 90-degree, 45-degree and 180-degree elbows. It is a pipe fitting that changes the direction of the pipeline. It is formed by pressing high-quality carbon steel, stainless acid-resistant steel and low-alloy steel seamless pipes in a special mold. The airtightness detection device is one of the important equipment for testing pressed elbows.
[0003] For example, a device for testing the air tightness of an airless pressure elbow proposed in the disclosed technology on the market includes a testing platform, a movable plate fixedly connected to the outer surface of the testing platform, a movable groove provided on the outer surface of the movable plate, two movable sliders slidably connected inside the movable groove, a mounting plate fixedly connected to the outer surface of the movable slider, a driving assembly for driving the mounting plate to move connected to the outer surface of the testing platform, and a sealing assembly fixedly connected to the outer surface of the mounting plate. This disclosed technology utilizes the cooperation between the sealing assembly, the limit block, the rotating hollow screw, the sealed piston and the rotating block to facilitate sealing the vents at both ends of the elbow. The detection assembly can be used to drive the telescopic tube to exhaust air, so that the gas can be discharged into the elbow through the intake pipe to detect the tightness of the elbow. However, this disclosed technology can only be applied to 180-degree elbows of different sizes, which is not applicable to a wide range of applications. The action of fixing the elbow is too complicated and the operation is not simple. At the same time, the seal at the sealing part is in a state of constant friction during batch testing. Once the seal is worn and fails, the accuracy of the detection device will be reduced. This disclosed technology cannot identify whether the elbow is airtight or the seal has failed. Another disclosed technology proposes an elbow waterless pressure tightness detection device, including a base plate, a plurality of mounting holes are opened on the periphery of the base plate, a hanging ring is fixedly connected to the top of the base plate, an elbow is attached to one side of the hanging ring, a bottom plug and a top plug are attached to the two ends of the elbow respectively, a first sealing ring and a second sealing ring are fixedly connected to the outer walls of the bottom plug and the top plug respectively, an end of the bottom plug close to the elbow is fixedly connected to the air inlet pipe, an end of the bottom plug away from the elbow is fixedly connected to the air guide pipe, and the other end of the air guide pipe is fixed by a mounting seat It is connected to a pressure pump, and a plurality of bases are fixedly connected to the bottom of the pressure pump. The setting of the pull rope in the disclosed technology is convenient for better limiting the top plug, the setting of the air duct is convenient for better connecting the pressure pump with the bottom plug, the setting of the mounting seat is convenient for better limiting the air duct, and the setting of the hanging ring is convenient for better limiting the elbow. However, in the disclosed technology, the two sets of plugs only rely on the sealing ring and the elbow mouth to maintain sealing, and there is no fixed structure. When pressurized, the internal air pressure will inevitably push the plug out of the elbow mouth, resulting in detection failure.
[0004] In summary, it is necessary to optimize and improve the structure of the elbow waterless pressure air tightness detection device to improve the application range and detection accuracy of the elbow waterless pressure air tightness detection device. Summary of the Invention
[0005] (1) Technical problems solved In view of the shortcomings of the existing technology, the present invention provides a device for detecting air tightness of elbows by waterless pressure testing, which solves the problems of insufficient detection accuracy and small scope of application of the device for detecting air tightness of elbows by waterless pressure testing in the existing technology.
[0006] (2) Technical solution To achieve the above objectives, the present invention is implemented through the following technical solutions: a device for detecting air tightness of an elbow without water pressure, comprising a base and an elbow body, the upper wall of the base and the left side position fixedly connected to a workbench, the upper wall of the base and the right side of the workbench are fixedly connected to a control cabinet and an air pump in sequence in front and back distribution, a touch screen is provided on the control cabinet, the upper wall of the workbench and the position close to the front wall of the workbench is fixedly connected to a lifting seat, the upper wall of the lifting seat is detachably connected to a fixed seat, the upper wall of the workbench and the rear of the fixed seat is slidably connected to a first slide through a first sliding structure, the upper part of the first slide is slidably connected to a second slide through a second sliding structure, the upper wall of the second slide is rotatably connected to a turntable through a rotating structure, and the first slide and the workbench, the second slide and the first slide, and the turntable and the second slide are all locked by quick-lock screws.
[0007] Preferably, a second sink groove which is connected to the rear wall of the fixed seat is provided inside the fixed seat, a second plug-in column is provided on the front wall inside the second sink groove, a pressurized chamber which is connected to the rear wall of the second plug-in column is provided inside the second plug-in column, a second arc groove is provided on the front wall inside the second sink groove and located on the periphery of the second plug-in column, an air inlet joint which is connected to the pressurized chamber is fixedly connected to the front wall of the fixed seat, an end of the air inlet joint away from the fixed seat is connected to the air pump through a hose, a supporting structure is provided on the rear wall of the fixed seat and located below the second sink groove, and a clamping structure is provided on the upper wall of the turntable and located at one end close to the rotating structure. A clamping structure for holding a fixed elbow body, the upper wall of the turntable and the end located away from the rotating structure is detachably connected to a movable plug through a blocking drive structure, the movable plug is provided with a first sinking groove which passes through the side of the movable plug away from the blocking drive structure, the inner right wall of the first sinking groove is provided with a first plug-in column, the inner right wall of the first sinking groove and the outer periphery of the first plug-in column are provided with a first arc groove, the fixed seat and the movable plug are provided with a sealing structure for maintaining sealing when installing the elbow body, and the front wall of the fixed seat and the right wall of the movable plug are also provided with a pressure detection structure for detecting pressure.
[0008] Preferably, the first sliding structure includes two groups of slide rails and four groups of sliding seats. The two groups of slide rails are distributed on the left and right and are fixedly connected to the upper wall of the workbench, and the length directions of the two groups of slide rails are parallel to the front and back directions of the workbench. The four groups of sliding seats are slidably connected to the upper walls of the two groups of slide rails in pairs, and the first slide is fixedly connected to the upper walls of the four groups of sliding seats.
[0009] Preferably, the second sliding structure includes two groups of slide grooves and four groups of sliders. The two groups of slide grooves are distributed front to back and are arranged in sequence on the upper wall of the first slide. The length directions of the two groups of slide grooves are parallel to the left and right directions of the first slide. The four groups of sliders are slidably connected to the inner walls of the two groups of slide grooves in pairs, and the second slide is fixedly connected to the upper walls of the four groups of sliders.
[0010] Preferably, the rotating structure is a rotating shaft, which is fixedly connected to the upper wall of the second slide and located in the center of the second slide in the front-to-back direction. The rotating shaft is located near the left side of the second slide, and the turntable is rotatably connected to the outer wall of the rotating shaft.
[0011] Preferably, the supporting structure is a support plate, which is fixedly connected to the rear wall of the fixed seat by reinforcing ribs. The cross-section of the support plate when viewed from the front is semicircular and the semicircular opening is facing upward. The axis of the support plate is collinear with the extension line of the axis of the second trough, and the inner diameter of the semicircular ring of the support plate is consistent with the inner diameter of the second trough.
[0012] Preferably, the clamping structure includes two groups of first cylinders, which are fixedly connected to the upper wall of the turntable in a front-to-back position, and the two groups of first cylinders are fixedly connected to the upper wall of the turntable through a group of pads respectively. The protruding shafts of the two groups of first cylinders are arranged at opposite ends and the ends of the protruding shafts of the two groups of first cylinders are fixedly connected with splints, and the two groups of first cylinders are both double-axis cylinders.
[0013] Preferably, the sealing drive structure is a second cylinder, which is fixedly connected to the upper wall of the turntable and close to the right end of the turntable. The axis of the extended shaft of the second cylinder is parallel to the left and right directions of the turntable. The movable plug is detachably connected to the end of the extended shaft of the second cylinder. The second cylinder is a dual-axis cylinder.
[0014] Preferably, the sealing structure includes a first sealing ring, a second sealing ring, a third sealing ring and a fourth sealing ring. The first sealing ring and the second sealing ring are respectively arranged on the inner side wall of the first sink groove and the outer circumference wall of the first plug-in column and are both located near one end of the first arc groove. The third sealing ring and the fourth sealing ring are respectively arranged on the inner side wall of the second sink groove and the outer circumference wall of the second plug-in column and are both located near one end of the second arc groove.
[0015] Preferably, the pressure detection structure includes a first pressure sensor, a second pressure sensor and a third pressure sensor. The first pressure sensor is fixedly connected to the right wall of the movable plug, and the detection rod of the first pressure sensor passes through the inner wall of the movable plug and extends into the first arc groove. The second pressure sensor and the third pressure sensor are both fixedly connected to the front wall of the fixed seat, and the detection rod of the second pressure sensor passes through the inner wall of the fixed seat and extends into the second arc groove. The detection rod of the third pressure sensor passes through the inner wall of the fixed seat and extends into the pressurized chamber.
[0016] (3) Beneficial effects The present invention provides a device for testing the air tightness of elbows without water pressure testing. It has the following beneficial effects: 1. Compared with the existing technology, the elbow waterless pressure air tightness detection device can drive the angle and distance between the axis of the movable plug and the fixed seat to change through the adjustment of the first sliding structure, the second sliding structure and the rotating structure, and can adapt to the detection of elbow bodies of different angles and lengths. The fixed seat and the lifting seat, as well as the movable plug and the second cylinder are all detachable connections, which can be replaced according to elbow bodies of different calibers, greatly improving the scope of use of the detection device.
[0017] 2. Compared with the existing technology, the elbow waterless pressure tightness detection device is respectively provided with plug-in columns for connecting the two ends of the elbow body in the movable plug and the fixed seat, and a group of sealing rings are respectively provided between the elbow body and the plug-in columns and between the elbow body and the inner wall of the sink groove to achieve double-layer sealing. An arc groove and a pressure sensor for detecting changes inside the arc groove are provided between the double-layer seals, which can effectively identify whether the sealing ring on the outer wall of the plug-in column has failed, thereby improving the detection accuracy.
[0018] 3. Compared with the existing technology, the elbow waterless pressure tightness detection device is provided with a support plate for correction and a clamping plate for clamping and fixing, so that the elbow body will not be displaced when the movable plug is plugged into one end of the elbow body and during pressurized testing, which effectively improves the safety of the detection device. BRIEF DESCRIPTION OF THE DRAWINGS
[0019] Figure 1 It is a schematic diagram of the structure of the present invention; Figure 2 For the present invention Figure 1 A partial enlarged view of point A in the middle; Figure 3 For the present invention Figure 1 A partial enlarged view of point B in the middle; Figure 4 It is a partial schematic diagram of the connection structure of the workbench, slide rail, slide seat and first slide of the present invention; Figure 5It is a partial side view of the connection structure of the first slide, the slider and the second slide of the present invention; Figure 6 This is a schematic cross-sectional view of the internal structure of the movable plug of the present invention; Figure 7 A partial sectional side view of the internal structure of the fixing seat of the present invention; Figure 8 It is a schematic diagram of the back structure of the fixing seat of the present invention.
[0020] Among them, 1, base; 2, workbench; 3, control cabinet; 301, touch screen; 4, air pump; 5, slide rail; 501, sliding seat; 6, first slide; 7, slide groove; 701, slider; 8, second slide; 9, rotating shaft; 10, turntable; 11, pad; 12, first cylinder; 13, splint; 14, second cylinder; 15, movable plug; 1501, first sink; 1502, first plug column; 150 3. First arc groove; 16. First pressure sensor; 17. Lifting seat; 18. Fixed seat; 1801. Second sink groove; 1802. Second plug-in column; 1803. Second arc groove; 1804. Pressurized chamber; 19. Air inlet connector; 20. Second pressure sensor; 21. Third pressure sensor; 22. Support plate; 23. First sealing ring; 24. Second sealing ring; 25. Third sealing ring; 26. Fourth sealing ring. DETAILED DESCRIPTION
[0021] The following will clearly and completely describe the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.
[0022] Example: like Figures 1 to 8 As shown, an embodiment of the present invention provides an elbow waterless pressure tightness detection device, including a base 1 and an elbow body, a workbench 2 is fixedly connected to the upper wall of the base 1 and at a position close to the left side, a control cabinet 3 and an air pump 4 are fixedly connected to the upper wall of the base 1 and located on the right side of the workbench 2 in a front-to-back distribution, and a touch screen 301 is provided on the control cabinet 3, a lifting seat 17 is fixedly connected to the upper wall of the workbench 2 and close to the front wall of the workbench 2, a fixed seat 18 is detachably connected to the upper wall of the lifting seat 17, a first slide 6 is slidably connected to the upper wall of the workbench 2 and located behind the fixed seat 18 through a first sliding structure, a second slide 8 is slidably connected to the top of the first slide 6 through a second sliding structure, a turntable 10 is rotatably connected to the upper wall of the second slide 8 through a rotating structure, and the first slide 6 and the workbench 2, the second slide 8 and the first slide 6, and the turntable 10 and the second slide 8 are all locked by quick-lock screws; In order to facilitate the forward and backward movement of the first slide 6 on the workbench 2, the first sliding structure includes two sets of slide rails 5 and four sets of sliding seats 501. The two sets of slide rails 5 are fixedly connected to the upper wall of the workbench 2 in a left-right distribution, and the length directions of the two sets of slide rails 5 are parallel to the front-back direction of the workbench 2. The four sets of sliding seats 501 are slidably connected to the upper walls of the two sets of slide rails 5 in pairs. The first slide 6 is fixedly connected to the upper walls of the four sets of sliding seats 501. By loosening the quick-locking screws on the first slide 6, the first slide 6 can be pushed to move forward and backward along the slide rails 5 to adjust the front-back position of the first slide 6. After the adjustment is completed, it is locked and fixed by the quick-locking screws. In order to facilitate the second slide 8 to move left and right above the first slide 6, the second sliding structure includes two groups of slide grooves 7 and four groups of sliders 701. The two groups of slide grooves 7 are distributed front and back and are arranged in sequence on the upper wall of the first slide 6. The length directions of the two groups of slide grooves 7 are parallel to the left and right directions of the first slide 6. The four groups of sliders 701 are slidably connected to the inner walls of the two groups of slide grooves 7 in pairs. The second slide 8 is fixedly connected to the upper wall of the four groups of sliders 701. By loosening the quick-locking screws on the second slide 8, the second slide 8 can be pushed to move left and right along the slide grooves 7 to adjust the left and right position of the second slide 8. After the adjustment is completed, it is tightened by the quick-locking screws.
[0023] In order to facilitate the adjustment of the angle of the turntable 10, the rotating structure is a rotating shaft 9, which is fixedly connected to the upper wall of the second slide 8 and is located in the middle of the second slide 8 in the front-to-back direction. The rotating shaft 9 is located near the left side of the second slide 8. The turntable 10 is rotatably connected to the outer wall of the rotating shaft 9. After loosening the quick-locking screw on the turntable 10, the turntable 10 can be pushed to rotate along the rotating shaft 9, so that the angle between the axis of the movable plug 15 and the fixed seat 18 is adjusted, thereby meeting the purpose of detecting the elbow body at different angles; In order to pressurize the inside of the elbow body to test the air tightness, a second sink 1801 is provided inside the fixing seat 18 and is connected to the rear wall of the fixing seat 18. A second plug-in column 1802 is provided on the inner front wall of the second sink 1801. A pressurized chamber 1804 is provided inside the second plug-in column 1802 and is connected to the rear wall of the second plug-in column 1802. A second arc groove 1803 is provided on the inner front wall of the second sink 1801 and is located on the periphery of the second plug-in column 1802. An air inlet connector 19 that is connected to the pressurized chamber 1804 is fixedly connected to the front wall of the fixing seat 18. The end of the air inlet connector 19 away from the fixing seat 18 is connected to the air pump 4 through a hose. After the elbow body is installed, the air pump 4 passes compressed air into the pressurized chamber 1804 through the air pipe and the air inlet connector 19. In order to facilitate the installation of the elbow body, a supporting structure is provided on the rear wall of the fixing seat 18 and below the second sink groove 1801. The supporting structure is a supporting plate 22. The supporting plate 22 is fixedly connected to the rear wall of the fixing seat 18 by reinforcing ribs. The front cross-section of the supporting plate 22 is semicircular and the semicircular opening is upward. The axis of the supporting plate 22 is collinear with the axis extension line of the second sink groove 1801. The inner diameter of the semicircular ring of the supporting plate 22 is consistent with the inner diameter of the second sink groove 1801. One end of the elbow body is placed above the supporting plate 22, and then the elbow body is pushed forward axially along the supporting plate 22 until the front end of the elbow body is inserted into the second sink groove 1801. The supporting plate 22 plays the role of guiding, positioning and supporting, making the installation easier. In order to fix the elbow body, a clamping structure for clamping and fixing the elbow body is provided on the upper wall of the turntable 10 and at one end close to the rotating structure. The clamping structure includes two groups of first cylinders 12. The two groups of first cylinders 12 are fixedly connected to the upper wall of the turntable 10 in a front-to-back relative manner. The two groups of first cylinders 12 are fixedly connected to the upper wall of the turntable 10 respectively through a group of pads 11. The extended shafts of the two groups of first cylinders 12 are arranged at opposite ends and the ends of the extended shafts of the two groups of first cylinders 12 are fixedly connected with a splint 13. The two groups of first cylinders 12 are double-axis cylinders. After one end of the elbow body is inserted into the second sink groove 1801, the other end is pressed flat toward the upper wall of the turntable 10. After pressing flat, the two groups of first cylinders 12 are started, driving the two groups of splints 13 to clamp and fix the elbow body to prevent the elbow body from moving when the movable plug 15 is inserted and during pressurization testing; In order to facilitate the docking of the movable plug 15 with one end of the elbow body, a movable plug 15 is detachably connected to the upper wall of the turntable 10 and the end located away from the rotating structure through a blocking drive structure. The blocking drive structure is a second cylinder 14. The second cylinder 14 is fixedly connected to the upper wall of the turntable 10 and close to the right end of the turntable 10. The axis of the extended shaft of the second cylinder 14 is parallel to the left and right directions of the turntable 10. The movable plug 15 is detachably connected to the end of the extended shaft of the second cylinder 14. The second cylinder 14 is a dual-axis cylinder. After the elbow body is fixed, the movable plug 15 is pushed by the extended shaft of the second cylinder 14 and moves toward the elbow body until the end of the elbow body away from the fixed seat 18 is inserted into the first sink groove 1501; In order to form a sealed space inside the elbow body, the movable plug 15 is provided with a first sinking groove 1501 which is connected to the side of the movable plug 15 away from the blocking drive structure, the first sinking groove 1501 is provided with a first plug-in column 1502 on the inner right wall, the first sinking groove 1501 is provided with a first arc groove 1503 on the inner right wall and located on the periphery of the first plug-in column 1502, the fixed seat 18 and the movable plug 15 are provided with a sealing structure for maintaining sealing when installing the elbow body, the sealing structure includes a first sealing ring 23, a second sealing ring 24, a third sealing ring 25 and a fourth sealing ring 26, and the first sealing ring 23 and the second sealing ring 24 are respectively provided at the first and second sealing rings 25 and 26. The inner side wall of the first sink 1501 and the outer circumferential wall of the first plug-in column 1502 are both located near one end of the first arc groove 1503. The third sealing ring 25 and the fourth sealing ring 26 are respectively arranged on the inner side wall of the second sink 1801 and the outer circumferential wall of the second plug-in column 1802 and are both located near one end of the second arc groove 1803. The first sealing ring 23 and the third sealing ring 25 are respectively used to seal the two ends of the elbow body to form a sealed space inside the elbow body. When the air pump 4 pressurizes the interior of the elbow body, the pressure inside the pressurized chamber 1804 that passes through the interior of the elbow body is detected by the pressure detection structure, and the detection result is fed back to the touch screen 301 of the control cabinet 3; In order to realize the dataization of airtightness detection and detect the seals, the front wall of the fixed seat 18 and the right wall of the movable plug 15 are also provided with a pressure detection structure for detecting pressure. The pressure detection structure includes a first pressure sensor 16, a second pressure sensor 20 and a third pressure sensor 21. The first pressure sensor 16 is fixedly connected to the right wall of the movable plug 15. The detection rod of the first pressure sensor 16 passes through the inner wall of the movable plug 15 and extends into the first arc groove 1503. The second pressure sensor 20 and the third pressure sensor 21 are both fixedly connected to the front wall of the fixed seat 18. The detection rod of the second pressure sensor 20 passes through the inner wall of the fixed seat 18 and extends into the second arc groove 1803. The detection rod of the third pressure sensor 21 passes through the inner wall of the fixed seat 18 and extends into the pressurized chamber. Inside 1804, the third pressure sensor 21 is used to detect the internal pressure of the pressurized chamber 1804. After compressed air is injected into the elbow body, the third pressure sensor 21 is used to detect whether the internal pressure of the elbow body changes within the specified time, so as to determine whether the air tightness of the elbow body is qualified. When the first sealing ring 23 or the third sealing ring 25 is worn, the compressed air will overflow into the first arc groove 1503 or the second arc groove 1803. The first pressure sensor 16 and the second pressure sensor 20 can be used to perform pressure detection on the first arc groove 1503 or the second arc groove 1803 during detection, so as to realize the detection of the sealing effect of the first sealing ring 23 or the third sealing ring 25, and replace them in time if failure is found, thereby effectively improving the accuracy of the detection device.
[0024] Working principle: Loosen the quick-lock screw on the first slide 6, and push the first slide 6 to move forward and backward along the slide rail 5 to adjust the front and rear position of the first slide 6. After the adjustment is completed, tighten it with the quick-lock screw. Loosen the quick-lock screw on the second slide 8, and push the second slide 8 to move left and right along the slide groove 7 to adjust the left and right position of the second slide 8. After the adjustment is completed, tighten it with the quick-lock screw. After loosening the quick-lock screw on the turntable 10, the turntable 10 can be pushed to rotate along the rotating shaft 9 to adjust the angle between the axis of the movable plug 15 and the fixed seat 18, so as to meet the purpose of detecting the elbow body at different angles. After installation, the air pump 4 introduces compressed air into the pressurized chamber 1804 through the air pipe and the air inlet joint 19, and one end of the elbow body is placed above the support plate 22. Then, the elbow body is pushed forward axially along the support plate 22 until the front end of the elbow body is inserted into the second sink groove 1801. The support plate 22 plays the role of guiding, positioning, and supporting, making the installation easier. After one end of the elbow body is inserted into the second sink groove 1801, the other end is pressed flat against the upper wall of the turntable 10. After pressing flat, the two groups of first cylinders 12 are started, driving the two groups of clamps 13 to clamp the elbow body to prevent the elbow body from moving when the movable plug 15 is inserted and during pressurization testing. After the elbow body is fixed, the movable plug 15 is pushed by the shaft extended from the second cylinder 14 and moves toward the elbow body until the end of the elbow body away from the fixed seat 18 is inserted into the first sink 1501. The first sealing ring 23 and the third sealing ring 25 are respectively used to seal the two ends of the elbow body to form a sealed space inside the elbow body. When the air pump 4 pressurizes the inside of the elbow body, the pressure inside the pressurized chamber 1804 that passes through the inside of the elbow body is detected by the pressure detection structure. The detection result is fed back to the touch screen 301 of the control cabinet 3. The third pressure sensor 21 is used to detect the internal pressure of the pressurized chamber 1804. When the elbow body is injected After the air is compressed, the third pressure sensor 21 is used to detect whether the internal pressure of the elbow body changes within the specified time, so as to determine whether the air tightness of the elbow body is qualified. When the first sealing ring 23 or the third sealing ring 25 is worn, the compressed air will overflow into the first arc groove 1503 or the second arc groove 1803. The first pressure sensor 16 and the second pressure sensor 20 can be used to perform pressure detection on the inside of the first arc groove 1503 or the second arc groove 1803 during detection, so as to detect the sealing effect of the first sealing ring 23 or the third sealing ring 25, and replace them in time if failure is found, thereby effectively improving the accuracy of the detection device.
[0025] While embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions, and variations may be made to these embodiments without departing from the principles and spirit of the invention, and that the scope of the invention is defined by the appended claims and their equivalents.
Claims
1. A device for testing the air tightness of elbows without water pressure, characterized by: The invention comprises a base (1) and an elbow body, wherein a workbench (2) is fixedly connected to the upper wall of the base (1) and at a position close to the left side, a control cabinet (3) and an air pump (4) are fixedly connected to the upper wall of the base (1) and at a position close to the right side of the workbench (2) in a front-to-back manner, and a touch screen (301) is provided on the control cabinet (3), a lifting seat (17) is fixedly connected to the upper wall of the workbench (2) and at a position close to the front wall of the workbench (2), and a fixing seat (18) is detachably connected to the upper wall of the lifting seat (17). The upper wall of the workbench (2) and located behind the fixed seat (18) is slidably connected to a first slide (6) through a first sliding structure, the upper part of the first slide (6) is slidably connected to a second slide (8) through a second sliding structure, the upper wall of the second slide (8) is rotatably connected to a turntable (10) through a rotating structure, and the first slide (6) and the workbench (2), the second slide (8) and the first slide (6), and the turntable (10) and the second slide (8) are all locked by quick-locking screws.
2. The device for testing air tightness of elbows without water pressure according to claim 1, characterized in that: The fixing seat (18) is provided with a second sink groove (1801) which is connected to the rear wall of the fixing seat (18), the inner front wall of the second sink groove (1801) is provided with a second plug-in column (1802), the inner side of the second plug-in column (1802) is provided with a pressurizing chamber (1804) which is connected to the rear wall of the second plug-in column (1802), the inner front wall of the second sink groove (1801) and the outer periphery of the second plug-in column (1802) are provided with a second arc groove (1803), the front wall of the fixing seat (18) is fixedly connected with an air inlet connector (19) which is connected to the pressurizing chamber (1804), the end of the air inlet connector (19) away from the fixing seat (18) is connected to the air pump (4) through a hose, the rear wall of the fixing seat (18) and the lower side of the second sink groove (1801) are provided with a supporting structure, the upper wall of the turntable (10) and the outer periphery of the turntable (10) are provided with a second arc groove (1803), the front wall of the fixing seat (18) is fixedly connected with an air inlet connector (19) which is connected to the pressurizing chamber (1804), the end of the air inlet connector (19) away from the fixing seat (18) is connected to the air pump (4) through a hose, the rear wall of the fixing seat (18) and the lower side of the second sink groove (1801) are provided with a supporting structure, A clamping structure for clamping the fixed elbow body is provided at one end close to the rotating structure, and a movable plug (15) is detachably connected to the upper wall of the turntable (10) and located at the end away from the rotating structure through a blocking drive structure. A first sinking groove (1501) is provided inside the movable plug (15) and is connected to the side of the movable plug (15) away from the blocking drive structure. A first plug-in column (1502) is provided on the right wall inside the first sinking groove (1501), and a first arc groove (1503) is provided on the right wall inside the first sinking groove (1501) and located on the periphery of the first plug-in column (1502). A sealing structure for maintaining sealing when installing the elbow body is provided inside the fixed seat (18) and the movable plug (15), and a pressure detection structure for detecting pressure is also provided on the front wall of the fixed seat (18) and the right wall of the movable plug (15).
3. The device for testing air tightness of elbows without water pressure according to claim 2, characterized in that: The first sliding structure comprises two groups of slide rails (5) and four groups of slide seats (501), the two groups of slide rails (5) are distributed left and right and fixedly connected to the upper wall of the workbench (2), and the length directions of the two groups of slide rails (5) are parallel to the front-back direction of the workbench (2), the four groups of slide seats (501) are slidably connected to the upper walls of the two groups of slide rails (5) in pairs, and the first slide table (6) is fixedly connected to the upper walls of the four groups of slide seats (501).
4. The device for testing air tightness of elbows without water pressure according to claim 3, characterized in that: The second sliding structure comprises two groups of slide grooves (7) and four groups of sliders (701), the two groups of slide grooves (7) are arranged in a front-to-back distribution on the upper wall of the first slide (6), the length directions of the two groups of slide grooves (7) are parallel to the left-right direction of the first slide (6), the four groups of sliders (701) are slidably connected to the inner side walls of the two groups of slide grooves (7) in pairs, and the second slide (8) is fixedly connected to the upper walls of the four groups of sliders (701).
5. The device for testing air tightness of elbows without water pressure according to claim 4, characterized in that: The rotating structure is a rotating shaft (9), which is fixedly connected to the upper wall of the second slide (8) and is located in the middle of the second slide (8) in the front-back direction. The rotating shaft (9) is located near the left side of the second slide (8), and the turntable (10) is rotatably connected to the outer wall of the rotating shaft (9).
6. The device for testing air tightness of elbows without water pressure according to claim 5, characterized in that: The supporting structure is a support plate (22), which is fixedly connected to the rear wall of the fixing seat (18) through reinforcing ribs. The support plate (22) has a semicircular ring shape in a front view and the semicircular ring opening is upward. The axis of the support plate (22) is collinear with the axis extension line of the second trough (1801), and the inner diameter of the semicircular ring of the support plate (22) is consistent with the inner diameter of the second trough (1801).
7. The device for testing air tightness of elbows without water pressure testing according to claim 6, characterized in that: The clamping structure comprises two groups of first cylinders (12), the two groups of first cylinders (12) are fixedly connected to the upper wall of the turntable (10) in a front-to-back relative manner, the two groups of first cylinders (12) are fixedly connected to the upper wall of the turntable (10) via a group of pads (11), the protruding shafts of the two groups of first cylinders (12) are both arranged at opposite ends, and the ends of the protruding shafts of the two groups of first cylinders (12) are fixedly connected with a clamping plate (13), and the two groups of first cylinders (12) are both double-axis cylinders.
8. The device for testing air tightness of elbows without water pressure testing according to claim 7, characterized in that: The blocking drive structure is a second cylinder (14), which is fixedly connected to the upper wall of the turntable (10) and close to the right end of the turntable (10). The axis of the extended shaft of the second cylinder (14) is parallel to the left and right directions of the turntable (10). The movable plug (15) is detachably connected to the end of the extended shaft of the second cylinder (14). The second cylinder (14) is a double-axis cylinder.
9. The device for testing air tightness of elbows without water pressure according to claim 8, characterized in that: The sealing structure comprises a first sealing ring (23), a second sealing ring (24), a third sealing ring (25) and a fourth sealing ring (26); the first sealing ring (23) and the second sealing ring (24) are respectively arranged on the inner side wall of the first sink groove (1501) and the outer circumferential wall of the first plug-in column (1502) and are both located near one end of the first arc groove (1503); the third sealing ring (25) and the fourth sealing ring (26) are respectively arranged on the inner side wall of the second sink groove (1801) and the outer circumferential wall of the second plug-in column (1802) and are both located near one end of the second arc groove (1803).
10. The device for testing air tightness of elbows without water pressure according to claim 9, characterized in that: The pressure detection structure includes a first pressure sensor (16), a second pressure sensor (20) and a third pressure sensor (21), wherein the first pressure sensor (16) is fixedly connected to the right wall of the movable plug (15), and the detection rod of the first pressure sensor (16) passes through the inner wall of the movable plug (15) and extends into the first arc groove (1503), and the second pressure sensor (20) and the third pressure sensor (21) are both fixedly connected to the front wall of the fixed seat (18), and the detection rod of the second pressure sensor (20) passes through the inner wall of the fixed seat (18) and extends into the second arc groove (1803), and the detection rod of the third pressure sensor (21) passes through the inner wall of the fixed seat (18) and extends into the pressurized chamber (1804).