Special-shaped pipe test clamping tool and horizontal and vertical test lines

Abstract

This invention discloses a clamping fixture for pressure testing of irregular-shaped pipe fittings, as well as horizontal and vertical pressure testing lines, relating to the field of pressure testing fixture technology. The clamping fixture for pressure testing of irregular-shaped pipe fittings includes a fixture base, clamping components, and a clamping drive. It has a good match with irregular-shaped pipe fittings and is a customized design for them. It can achieve rapid clamping and disassembly of parts and meet the needs of automated pressure testing systems, thus improving efficiency and reducing costs. The horizontal and vertical pressure testing lines, including the aforementioned clamping fixture for pressure testing of irregular-shaped pipe fittings, not only achieve rapid loading and unloading of irregular-shaped pipe fittings but also enable automated pressure testing on a production line, thereby improving testing efficiency and reducing testing costs. The horizontal and vertical pressure testing lines can perform continuous and automated batch pressure testing of irregular-shaped pipe fittings without stopping the entire system, solving the problem of low testing efficiency for large-volume products in existing systems.

Description

Technical Field

[0001] This invention relates to the field of pressure testing fixtures, and in particular to a clamping fixture for pressure testing of irregular-shaped pipe fittings and a horizontal and vertical pressure testing line for automated pressure testing of irregular-shaped pipe fittings. Background Technology

[0002] Some special-shaped pipe fittings, such as Figure 1 The irregular thin-walled pipe fittings with spatial corners shown often require pressure testing after manufacturing to ensure the quality of the pipe fittings upon leaving the factory.

[0003] Traditional pressure testing equipment uses fixtures to clamp the pipe fittings to be tested. However, existing pressure testing fixtures are only suitable for clamping pipe fittings with regular shapes and cannot meet the pressure testing clamping requirements of irregular-shaped pipe fittings. Therefore, it is necessary to propose a new type of clamping fixture for pressure testing of irregular-shaped pipe fittings to meet the pressure testing clamping requirements of irregular-shaped pipe fittings.

[0004] In addition, traditional pressure testing equipment clamps one pipe fitting at a time for pressure testing, which not only results in low testing efficiency, but also requires the equipment to be stopped when loading and unloading pipe fittings, which takes a long time and further reduces the working efficiency of the pressure testing equipment. Summary of the Invention

[0005] The purpose of this invention is to provide a clamping fixture for pressure testing of irregular-shaped pipe fittings and a horizontal and vertical pressure testing line for automated pressure testing of irregular-shaped pipe fittings. The clamping fixture for pressure testing of irregular-shaped pipe fittings can be used for the rapid loading and unloading of irregular-shaped pipe fittings. The horizontal and vertical pressure testing lines including this fixture can perform batch continuous automatic pressure testing of irregular-shaped pipe fittings without stopping the machine, thereby improving the pressure testing efficiency and solving the problems existing in the prior art.

[0006] To achieve the above objectives, the present invention provides the following solution: On one hand, the present invention provides a clamping fixture for pressure testing of irregularly shaped pipe fittings, which can be used for clamping irregularly shaped pipe fittings, wherein the two end faces of the irregularly shaped pipe fittings have a spatial angle; the clamping fixture for pressure testing of irregularly shaped pipe fittings includes: The tooling base includes a tooling base plate and a tooling upright plate fixed at an angle to the tooling base plate; The clamping assembly includes an angle support wedge block disposed on the tooling base plate, a tooling clamping plate slidably mounted on the top inclined surface of the angle support wedge block, and a tooling fixing plate disposed on the tooling upright plate. A spatial angle adapted to the irregular pipe fitting is formed between the tooling clamping plate and the tooling fixing plate. A clamping drive is provided on the tooling base plate or the angle support wedge block. The clamping drive is connected to the tooling clamping plate and is used to drive the tooling clamping plate to press the irregular pipe fitting to be tested onto the tooling fixing plate.

[0007] In some embodiments, the clamping fixture for pressure testing of the irregular-shaped pipe fitting further includes a positioning component, the positioning component comprising: A tooling positioning block is disposed on the tooling upright plate and located on one side of the tooling fixing plate. The tooling positioning block is used to position the end of the special-shaped pipe fitting to be tested. The clamping unit includes a tooling angle drive and a tooling clamping block. The tooling angle drive is disposed on the tooling upright plate, and the tooling clamping block is fixed to the output end of the tooling angle drive. The tooling angle drive is used to drive the tooling clamping block to rotate and switch between a fixed position and a disassembled position. When the tooling clamping block is in the fixed position, it can clamp the end of the irregular pipe fitting. When the tooling clamping block is in the disassembled position, it is away from the irregular pipe fitting. Multiple sets of the clamping units are arranged on the outer periphery of the tooling fixing plate.

[0008] In some embodiments, the outer wall of the tooling fixing plate is provided with an outer support platform for the tooling fixing plate, and the first end face of the irregular pipe fitting is provided with an end face sealing groove that is adapted to the concave and convex shape of the outer support platform for the tooling fixing plate.

[0009] In some embodiments, the end face of the tooling clamping plate is provided with a sealing groove, the second end of the irregular tube is used to insert into the sealing groove, and the inner wall of the second end port of the irregular tube is provided with an inner support platform that matches the inner step of the sealing groove.

[0010] In some embodiments, the angle support wedge is arranged at an acute angle to the tooling upright; the top inclined surface of the angle support wedge is arranged from high to low along the direction away from the tooling upright. The top of the top slope is recessed to form a recessed slope parallel to the top slope. A tooling slide rail is provided on the recessed slope along the inclination direction of the top slope. A tooling slider is slidably mounted on the tooling slide rail. A tooling support block is fixed on the tooling slider. The tooling clamping plate is fixed on the tooling support block. A tooling support plate is provided at the bottom of the top slope, and the clamping drive is fixed on the tooling support plate and connected to the tooling slider or the tooling support block.

[0011] In some embodiments, the clamping drive is a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder.

[0012] On the other hand, the present invention proposes a horizontal pressure testing line that uses the differential pressure method for pipe fitting pressure testing. It includes a horizontal conveyor line, testing fixtures, and multiple clamping fixtures for testing irregularly shaped pipe fittings as described above, wherein: The testing fixture includes a testing fixture base plate, a testing fixture support column with its bottom set on the testing fixture base plate, a testing fixture top plate set on the top of the testing fixture support column, a hollow shaft cylinder set on the testing fixture top plate, and a first position sensor set on the testing fixture base plate. The horizontal conveyor line includes a first transmission rail, a pallet drive, and multiple first transmission pallets slidably mounted on the first transmission rail. The first transmission rail passes between the bottom plate and the top plate of the testing fixture. Each of the first transmission pallets is provided with a clamping fixture for testing irregular pipe fittings, and the clamping fixture for testing irregular pipe fittings is fixed to the first transmission pallet through the fixture bottom plate. The pallet drive is used to drive each of the first transmission pallets to be conveyed along the first transmission rail, so as to successively transport the irregular pipe fittings to be tested to the testing fixture for testing.

[0013] In some embodiments, the first transmission rail is a closed-loop annular rail; the pallet drive is disposed on the inner ring of the annular rail, and the pallet drive includes: Driving gear and driven gear; The first chain is looped around the driving gear and the driven gear in a closed loop, and the inner end of each of the first transmission plates is connected to the first chain. The first motor has its output end connected to the drive gear to drive the first chain drive.

[0014] Furthermore, this invention proposes a vertical pressure testing line that uses the bubble method for pipe pressure testing. It includes a vertical conveyor line, pressure testing fixtures, and multiple clamping fixtures for testing irregularly shaped pipes as described above, wherein: The pressure testing fixture includes a pressure testing fixture base, a pressure testing fixture support column with its bottom set on the pressure testing fixture base, a pressure testing fixture connecting block set inside the pressure testing fixture support column, a water tank set below the pressure testing fixture base, a top pressure cylinder set inside the water tank, and a second position sensor set at the top opening of the water tank. The vertical conveyor line includes a pallet drive, a linear guide support disposed inside the connecting block of the pressure testing fixture, a second transmission linear guide disposed on the outer periphery of the linear guide support, and a plurality of second transmission pallets slidably mounted on the second transmission linear guide. Each of the second transmission pallets is provided with a clamping fixture for pressure testing of the irregular pipe fitting, and the clamping fixture for pressure testing of the irregular pipe fitting is fixed to the second transmission pallet through the fixture base plate. The pallet drive is used to drive each of the second transmission pallets to be conveyed along the second transmission linear guide, so as to successively transport the irregular pipe fitting to be pressure tested into the water tank for pressure testing.

[0015] In some embodiments, the second transmission rail is a closed-loop annular rail; the pallet transmission drive includes: The drive shaft extends through the top of both of the linear guide supports, and the two ends of the drive shaft are rotatably connected to the top of the two test pressure fixture support columns, respectively. The driven shaft extends through the bottom of the two linear guide supports, and the two ends of the driven shaft are rotatably connected to the bottom of the two test pressure fixture support columns, respectively. A sprocket is fitted onto both the drive shaft and the driven shaft. The second chain is looped around the sprocket on the drive shaft and the sprocket on the driven shaft, and the bottom surface of each of the second transmission plates is connected to the second chain. The second motor is fixed to the support column of the test fixture by a motor bracket. The output end of the second motor is connected to the drive shaft to drive the second chain drive.

[0016] The present invention achieves the following technical effects compared to the prior art: The clamping fixture for pressure testing of irregular pipe fittings proposed in this invention has a good matching degree with irregular pipe fittings. It is a customized design for irregular pipe fittings, which can realize the quick clamping and disassembly of parts and meet the needs of automated pressure testing of the system, thereby improving efficiency and reducing costs.

[0017] The horizontal and vertical pressure testing lines proposed in this invention, including the aforementioned clamping fixtures for testing irregularly shaped pipe fittings, not only enable rapid loading and unloading of irregularly shaped pipe fittings but also achieve automated pressure testing on an assembly line, thereby improving testing efficiency and reducing testing costs. The pressure testing lines can perform continuous and automated batch pressure testing of irregularly shaped pipe fittings without shutting down the entire system, solving the problem of low testing efficiency for large-volume products in existing systems. Attached Figure Description

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0019] Figure 1 This is a schematic diagram of the structure of the irregular-shaped pipe fitting to be tested according to an embodiment of the present invention; Figure 2 This is a front view of the irregular-shaped pipe fitting to be tested according to an embodiment of the present invention; Figure 3 This is a side view of the irregular-shaped pipe fitting to be tested according to an embodiment of the present invention; Figure 4 for Figure 3 A schematic diagram of the AA cross-section; Figure 5 for Figure 4 Enlarged structural diagram at point I; Figure 6 This is a schematic diagram of the clamping fixture for pressure testing of irregularly shaped pipe fittings disclosed in an embodiment of the present invention; Figure 7 This is a schematic diagram of the structure and installation of the angle support wedge block in the clamping fixture for pressure testing of irregular pipe fittings disclosed in an embodiment of the present invention; Figure 8 This is a schematic diagram of the fixture fixing plate in the clamping fixture for pressure testing of irregular pipe fittings disclosed in an embodiment of the present invention; Figure 9 for Figure 8 BB cross-sectional diagram; Figure 10 This is a schematic diagram of a clamping fixture for pressure testing of irregularly shaped pipe fittings disclosed in an embodiment of the present invention, used to clamp irregularly shaped pipe fittings. Figure 11 This is a schematic diagram of the structure of the horizontal pressure testing line disclosed in an embodiment of the present invention; Figure 12 This is a schematic diagram of the structure of the first transmission rail in the horizontal test line disclosed in an embodiment of the present invention; Figure 13 This is a schematic diagram of the structure and assembly of the first transmission support plate in the horizontal pressure testing line disclosed in an embodiment of the present invention; Figure 14 This is a schematic diagram of the assembly of the clamping fixture for pressure testing of irregularly shaped pipes disclosed in an embodiment of the present invention on the first transmission support plate; Figure 15 This is a schematic diagram of the testing fixture in the horizontal pressure testing line disclosed in an embodiment of the present invention; Figure 16 This is a schematic diagram of the vertical pressure testing line disclosed in an embodiment of the present invention; Figure 17 This is a schematic diagram of the vertical test line disclosed in an embodiment of the present invention without the second transmission connecting plate. Figure 18 for Figure 17 The main view; Figure 19 for Figure 17 Top view; Figure 20 for Figure 17 Side view; Figure 21 for Figure 20 A schematic diagram of the CC cross-section; Figure 22 This is a schematic diagram of the structure and assembly of the second transmission support plate in the vertical pressure testing line disclosed in an embodiment of the present invention; Figure 23 This is a schematic diagram of the assembly of the clamping fixture for pressure testing of irregularly shaped pipes disclosed in an embodiment of the present invention on the second transmission support plate; Figure 24 This is a schematic diagram of the water tank in the vertical pressure testing line disclosed in an embodiment of the present invention.

[0020] In the figure, the attached figures are labeled as follows: 100. Clamping fixture for pressure testing of irregular pipe fittings; 1. Irregular pipe fitting; 2. End face sealing groove; 3. Fixture upright plate; 4. Fixture base plate; 5. Angle support wedge; 6. Fixture slider; 7. Fixture slide rail; 8. Clamping drive; 9. Fixture support plate; 10. Support plate fastening screws; 11. Fixture support block; 12. Fixture clamping plate; 121. Sealing groove; 13. Fixture positioning block; 14. Fixture fixing plate; 15. Fixture corner drive; 16. Fixture clamping block; 17. Fixture fixing plate outer support platform; 18. Fixture fixing plate end face; 200. Horizontal test pressure line; 19. First transmission rail; 20. First transmission slider; 21. First transmission support plate; 22. First transmission connecting plate; 23. Inspection fixture base plate; 24. Inspection fixture support column; 25. Inspection fixture top plate; 26. Guide shaft; 27. First air cylinder rod; 28. Guide shaft lower plate; 29. ​​Hollow shaft cylinder; 30. First chain; 31. Drive gear; 32. First motor; 33. First position sensor; 34. Driven gear; 300. Vertical test pressure line; 35. Second transmission rail; 36. Second transmission slider; 37. Second transmission support plate; 38. Second transmission connecting plate; 39. Rail support; 40. Test pressure fixture support column; 41. Test pressure fixture connecting block; 42. Test pressure fixture base; 43. Test pressure fixture bottom plate; 44. Second chain; 45. Sprocket; 46. Support bearing; 47. Drive shaft; 48. Second motor; 49. Motor bracket; 50. Water tank; 51. Second position sensor; 52. Top pressure cylinder; 53. Second intermediate air cylinder rod; 54. Driven shaft. Detailed Implementation

[0021] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0022] One of the objectives of this invention is to provide a clamping fixture for pressure testing of irregularly shaped pipe fittings, which can be used for the rapid loading and unloading of irregularly shaped pipe fittings, thereby solving the problems existing in the prior art.

[0023] Another objective of this invention is to provide a horizontal pressure testing line that includes the above-mentioned clamping fixture for testing irregular pipe fittings, which can perform batch continuous automatic pressure testing on irregular pipe fittings without stopping the machine, thereby improving the pressure testing efficiency and solving the problem of low pressure testing efficiency for large batches of products.

[0024] Another objective of this invention is to provide a vertical pressure testing line comprising the above-mentioned clamping fixture for pressure testing of irregular pipe fittings, which can perform batch continuous automatic pressure testing of irregular pipe fittings without stopping the machine, thereby improving the pressure testing efficiency and solving the problem of low pressure testing efficiency for large batches of products.

[0025] To make the above-mentioned objects, features and advantages of the present invention more apparent and understandable, the present invention will be further described in detail below with reference to the accompanying drawings and specific embodiments.

[0026] Example 1 like Figure 6 As shown in the figure, this embodiment provides a clamping fixture 100 for pressure testing of irregularly shaped pipe fittings, which is mainly used for... Figures 1-5 The clamping of the irregular pipe fitting 1 is shown. The irregular pipe fitting 1 has a certain degree of curvature and torsion, and its two end faces have a spatial angle; that is, the two end faces of the irregular pipe fitting 1 not only have a radial angle but also twist towards each other, as shown... Figure 3 As shown, when the right end face of the irregular pipe fitting is in a two-dimensional planar view, the left end face is still in a three-dimensional view. The side wall of this irregular pipe fitting 1 is provided with a pressure test hole, which is a standard design in the field of pipe fitting pressure testing and is a clear technical solution for those skilled in the art; therefore, it will not be elaborated further.

[0027] against Figure 1 The irregular pipe fitting 1 shown is designed with the following clamping fixture 100 for pressure testing: it includes a fixture base, a clamping assembly, and a clamping drive 8. The fixture base includes a fixture base plate 4 and a fixture upright plate 3 fixed at an angle to the fixture base plate 4; the clamping assembly includes an angle support wedge 5 set on the fixture base plate 4, a fixture clamping plate 12 slidably installed on the top inclined surface of the angle support wedge 5, and a fixture fixing plate 14 set on the fixture upright plate 3. A spatial angle adapted to the irregular pipe fitting is formed between the fixture clamping plate 12 and the fixture fixing plate 14. The fixture clamping plate 12 and the fixture fixing plate 14 are respectively used to seal and tighten with the two end faces of the irregular pipe fitting 1; the clamping drive 8 is set on the fixture base plate 4 or the angle support wedge 5. The clamping drive 8 is connected to the fixture clamping plate 12 and is used to drive the fixture clamping plate 12 to move linearly so as to press the irregular pipe fitting 1 to be tested onto the fixture fixing plate 14, thereby realizing the clamping of the irregular pipe fitting 1 between the fixture clamping plate 12 and the fixture fixing plate 14.

[0028] In some feasible implementations, both the tooling base plate 4 and the tooling upright plate 3 are preferably rectangular plates of uniform thickness. The connection methods between the tooling base plate 4 and the tooling upright plate 3 include, but are not limited to, welding, bolting, tenon and mortise joints, or integral molding. Since the spatial angle between the tooling clamping plate 12 and the tooling fixing plate 14 can be adjusted by using angle support wedges 5 with different inclinations, the included angle between the tooling base plate 4 and the tooling upright plate 3 can be an obtuse angle, an acute angle, or a right angle. Then, by using angle support wedges 5 with matching inclinations according to this included angle and the spatial angle of the irregular pipe fitting 1, the clamping requirements of the tooling for irregular pipe fittings 1 with different spatial angles can be met.

[0029] The tooling base plate 4 and the tooling upright plate 3 are arranged at right angles, which can ensure the tooling's small size and integration, and also facilitate the tooling's installation on any test line, thus improving the tooling's applicability.

[0030] In some feasible implementations, the tooling clamping plate 12 and the tooling fixing plate 14 are mainly used to clamp the irregular pipe fitting 1 and close the port of the irregular pipe fitting 1. The tooling clamping plate 12 and the tooling fixing plate 14 include, but are not limited to, circular or polygonal plates, as long as the end face of the plate has a circular sealing structure that matches the port of the irregular pipe fitting 1. Specifically, such as Figures 6-10 As shown, both the preferred tooling clamping plate 12 and the tooling fixing plate 14 are circular plates.

[0031] Some feasible implementation methods, such as Figures 7-9 As shown, to ensure the clamping degree and sealing effect of the tooling fixing plate 14 on the first end port of the irregular pipe fitting 1, it is preferable to provide an outer support platform 17 for the tooling fixing plate 14 on the outer wall of the port. This outer support platform 17 is mainly formed by the reduced diameter of the outer wall of the port of the tooling fixing plate 14, specifically a recessed step located on the outer wall of the port of the tooling fixing plate 14. The end face of the port of the tooling fixing plate 14, i.e., the end face 18 of the tooling fixing plate, together with the outer support platform 17, constitutes the port stepped plug of the tooling fixing plate 14.

[0032] The first end of the irregular-shaped pipe fitting 1 (i.e., the end used to abut against the tooling fixing plate 14) is circular, for inserting into the outer support platform 17 of the tooling fixing plate. Specifically, a face sealing groove 2 is concentrically formed on the end face of the first end of the irregular-shaped pipe fitting 1, such as... Figure 5 As shown, the cross-section of the end face sealing groove 2 is U-shaped. The first end of the irregular pipe fitting 1 is inserted into the outer support platform 17 of the tooling fixing plate through the end face sealing groove 2, and the outer support platform 17 of the tooling fixing plate and the end face sealing groove 2 are fitted with a clearance. After being inserted into place, the end face 18 of the tooling fixing plate is exactly abutted against the bottom of the end face sealing groove 2, and the outer ring end face of the end face sealing groove 2 is exactly abutted against the recessed step end face of the outer support platform 17 of the tooling fixing plate.

[0033] To ensure sealing, it is preferable that the recessed step end face and / or the bottom of the end face sealing groove 2 of the tooling fixing plate outer support platform 17 are provided with sealing rings. Sealing rings include, but are not limited to, O-rings.

[0034] Some feasible implementation methods, such as Figures 4-6 As shown, an annular sealing groove 121 is concentrically formed on the end face of the tooling clamping plate 12, and the sealing groove 121 is arranged near the edge of the tooling clamping plate 12. The second end of the shaped pipe fitting 1 (i.e., the end used to abut against the tooling clamping plate 12) is circular and is used to insert into the sealing groove 121. When the second end of the shaped pipe fitting 1 is aligned with the tooling clamping plate 12, the second end of the shaped pipe fitting 1 is precisely embedded in the sealing groove 121, and the inner wall of the second end of the shaped pipe fitting 1 is provided with an inner support platform that matches the concave and convex surfaces of the inner ring step surface of the sealing groove 121. After the second end of the shaped pipe fitting 1 is inserted into the tooling clamping plate 12, the end face of the second end of the shaped pipe fitting 1 abuts against the bottom of the groove of the sealing groove 121, and at the same time, the stepped end face of the aforementioned inner support platform abuts against the stepped end face of the inner ring of the sealing groove 121, thereby realizing the positioning and assembly of the shaped pipe fitting 1 by the tooling clamping plate 12.

[0035] To ensure sealing, it is preferable that the bottom of the sealing groove 121 of the tooling clamping plate 12 and / or the stepped end face of the inner support platform are provided with sealing rings. The sealing rings include, but are not limited to, O-rings.

[0036] Some feasible implementation methods, such as Figure 6 and Figure 7 As shown, the preferred angle support wedge 5 and the tooling upright plate 3 are arranged in a non-perpendicular relationship, that is, the right side of the angle support wedge 5 is arranged at an acute angle to the tooling upright plate 3. The angle support wedge 5 is inclined relative to the tooling upright plate 3, which can adapt to the relative position relationship of the two ends in the irregular pipe fitting 1. The fixing method between the angle support wedge 5 and the tooling base plate 4 includes, but is not limited to, bolt connection, screw connection and other detachable installation methods.

[0037] like Figure 6 , Figure 7 and Figure 10 As shown, the top inclined surface of the angle support wedge 5 is arranged from high to low along the direction away from the tooling upright plate 3. The top of the top inclined surface of the angle support wedge 5 is recessed to form a recessed inclined surface parallel to the top inclined surface. A tooling slide rail 7 is provided on the recessed inclined surface, arranged along the inclined direction of the top inclined surface. A tooling slider 6 is slidably mounted on the tooling slide rail 7. A tooling support block 11 is fixed on the tooling slider 6. The tooling clamping plate 12 is fixed to the tooling support block 11, and the fixing method includes, but is not limited to, welding, bolt connection, or screw connection. Meanwhile, refer to... Figure 7 and Figure 10A tooling support plate 9 is provided at the bottom of the top inclined surface of the angle support wedge 5. The tooling support plate 9 is a right-angled L-shaped support plate with uniform thickness. The bottom plate is fixed on the top inclined surface of the angle support wedge 5. The clamping drive 8 is fixed on the vertical plate of the tooling support plate 9 and connected to the tooling slider 6 or the tooling support block 11. By driving the tooling support block 11 to slide along the tooling slide rail 7, the tooling clamping plate 12 can clamp or disassemble the pipe fitting. The shape of the tooling support block 11 is not limited, including but not limited to U-shaped or flat plate shapes.

[0038] To ensure the support strength of the tooling support plate 9, it is preferable that the tooling support plate 9 adopts an integral molding structure, and its base plate can be fixed to the angle support wedge block 5 by multiple support plate fastening screws 10.

[0039] The tooling slide rail 7 includes, but is not limited to, one or more rails. When multiple rails are provided, any two tooling slide rails 7 are parallel to each other.

[0040] The tooling slide rail 7 can be a protruding slide rail assembled on the angle support wedge 5, or a grooved linear rail embedded in the top recessed inclined surface of the angle support wedge 5. It can be configured into the appropriate structural form according to actual needs, and will not be elaborated further.

[0041] The tooling slider 6 adopts a known slider structure, and its sliding assembly technology with the tooling slide rail 7 is known in the prior art, and will not be described in detail here.

[0042] The aforementioned downward slope creates a limiting step at the center of the top slope of the angle support wedge 5. This limiting step serves as the end limiting structure of the tooling slide rail 7, restricting the tooling slider 6 from moving away from the tooling fixing plate 14. Simultaneously, preferably, a limiting plate or limiting block is provided at the front end of the tooling slide rail 7 (i.e., the end closer to the tooling fixing plate 14) to restrict the tooling slider 6 from moving closer to the tooling fixing plate 14. Figure 6 As shown, the limiting plate or limiting block can be fixed to the end of the angle support wedge 5 by screws or bolts, as long as the limiting plate or limiting block is higher than the tooling slide rail 7, so as to ensure the limiting effect on the tooling slider 6.

[0043] In some feasible implementations, the clamping drive 8 preferably adopts a linear drive mechanism, including but not limited to a cylinder, a hydraulic cylinder, an electric slide (screw-slider mechanism), an electric cylinder, etc. Taking the clamping drive 8 using a cylinder as an example, it is arranged parallel to the tooling slide rail 7, the bottom of the cylinder is fixed on the vertical plate of the tooling support plate 9, and the piston end of the cylinder is connected to the tooling support block 11.

[0044] In some feasible implementations, to ensure the clamping and fixing effect of the clamping fixture 100 for pressure testing of irregular pipe fittings on the irregular pipe fitting 1, it is preferable that the clamping fixture 100 for pressure testing of irregular pipe fittings is also provided with a positioning component to reinforce the irregular pipe fitting 1. For example Figure 10 As shown, the outer wall of the first end port of the irregular pipe fitting 1 is generally radially expanded to form a positioning boss. Based on this positioning boss, the positioning assembly includes a tooling positioning block 13 and a clamping unit. The tooling positioning block 13 is disposed on the tooling upright plate 3 and located on one side of the tooling fixing plate 14. The tooling positioning block 13 is used to position the end of the irregular pipe fitting 1 to be pressure tested. The clamping unit includes a tooling angle drive 15 and a tooling clamping block 16. The tooling angle drive 15 is disposed on the tooling upright plate 3. One end of the tooling clamping block 16 is fixed to the output end of the tooling angle drive 15. The tooling angle drive 15 is used to... The tooling clamping block 16 is driven to rotate, switching between a fixed position and a disassembled position. When the tooling clamping block 16 is in the fixed position, its other end clamps the positioning boss of the shaped pipe fitting 1, ensuring a tight connection between the shaped pipe fitting 1 and the tooling fixing plate 14. When the tooling clamping block 16 is in the disassembled position, its other end moves away from the positioning boss of the shaped pipe fitting 1, allowing the shaped pipe fitting 1 to be detached from the tooling fixing plate 14. In practical applications, it is preferable that multiple sets of the aforementioned clamping units are arranged on the outer periphery of the tooling fixing plate 14, such as... Figure 10 As shown, three sets of clamping units are evenly distributed on the outer periphery of the tooling fixing plate 14.

[0045] In the clamping unit, the tooling angle drive 15 includes, but is not limited to, a micro motor, an angle hydraulic cylinder, and an angle pneumatic cylinder, with an angle pneumatic cylinder being preferred. Pneumatic cylinders offer high stroke control precision and can accurately control the rotation direction and angle of the tooling clamping block 16. The tooling clamping block 16 is preferably a rectangular block, with one end connected to the motor output. The connection method includes, but is not limited to, bolt connections.

[0046] In some feasible implementations, the preferred tooling positioning block 13 includes an L-shaped crank arm bracket and a boot-shaped positioning block. For example... Figure 7 and Figure 10 As shown, to facilitate quick positioning and disassembly of the irregular pipe fitting 1 and the tooling fixing plate 14, it is preferable to set only one set of tooling positioning blocks 13. The top crossbeam of the L-shaped crank arm bracket of the tooling positioning block 13 is fixed to the top side of the tooling upright plate 3, and the fixing method includes, but is not limited to, welding, bolt connection, and screw connection. The side upright beam of the L-shaped crank arm bracket of the tooling positioning block 13 is located on the front side of the tooling upright plate 3 and is parallel to the tooling upright plate 3. The boot-shaped positioning block is fixed to the bottom end of this side upright beam (the fixing method includes, but is not limited to, welding, bolt connection, and screw connection). The pointed end of the boot-shaped positioning block points towards the irregular pipe fitting 1. When assembling the special-shaped pipe fitting 1 on the tooling, firstly, the first end of the special-shaped pipe fitting 1 is placed between the embedded boot-shaped positioning block and the tooling fixing plate 14 to achieve the initial positioning of the special-shaped pipe fitting 1 by the boot-shaped positioning block. Then, the tooling rotation drive 15 is started to drive the tooling clamping block 16 to rotate, so that the tooling clamping block 16 simultaneously clamps the positioning boss on the outer wall of the special-shaped pipe fitting 1.

[0047] In some feasible implementations, except for the sealing ring, all other components of the preferred clamping fixture 100 for pressure testing of irregular pipe fittings can be made of stainless steel (manufacturing process is not limited, such as casting). It has excellent durability and corrosion resistance, which helps to extend the service life of the fixture.

[0048] The following example illustrates the loading and unloading principle of the clamping fixture 100 used for pressure testing of the aforementioned irregular-shaped pipe fittings: The outer support platform 17 of the tooling fixing plate 14 is designed and manufactured according to the major diameter of the end face sealing groove 2. The end face 18 of the tooling fixing plate is pressed against the bottom of the end face sealing groove 2. The wall thickness at this position is less than the groove width of the end face sealing groove 2 to ensure that the end face 18 of the tooling fixing plate 18 is in contact with the bottom of the end face sealing groove 2. The tooling fixing plate 14 is fixed to the tooling upright plate 3 with screws. Three tooling corner drives 15 are evenly distributed and fixed on the outer periphery of the tooling fixing plate 14 at 120 degrees, and each tooling corner drive 15 has a tooling clamping block 16 installed at its output end to clamp the first end of the pipe fitting. The size of the angle support wedge 5 is designed according to the deflection angle of the irregular pipe fitting 1. Its size is determined by the spatial angle between the two ends of the irregular pipe fitting 1. The tooling clamping plate 12 is fixed to the tooling support block 11 with screws. A tooling slider 6 is mounted on the bottom surface of the tooling support block 11, and the tooling slider 6 is mounted on the tooling slide rail 7. The tooling slide rail 7 is fixed to the downward-sloping surface of the angle support wedge block 5 with screws. The clamping drive 8 is fixed to the angle support wedge block 5 via the tooling support plate 9 and the support plate fastening screws 10. The piston rod of the clamping drive 8 is connected to the tooling support block 11 to push the tooling clamping plate 12 to clamp and release parts. The tooling positioning block 13 is mounted on the tooling upright plate 3 and can be used to adjust the angle of the irregularly shaped pipe fitting 1.

[0049] The clamping fixture 100 for pressure testing of irregular pipe fittings can be adapted to be installed in various pressure testing systems, such as bubble pressure testing systems and differential pressure testing systems (such as differential pressure air tightness testers). The clamping fixture 100 and the irregular pipe fitting 1 clamped on it can be transported to the water tank or tester for pressure testing through the transmission mechanism of the pressure testing system.

[0050] The clamping fixture 100 for pressure testing of irregular pipe fittings can be used in conjunction with a robotic arm to grab irregular pipe fittings 1 during loading and unloading, thereby automating the loading and unloading of irregular pipe fittings 1 and improving pressure testing efficiency.

[0051] Therefore, the clamping fixture 100 for pressure testing of irregular pipe fittings of the present invention has a good matching degree with the irregular pipe fitting 1. It is a customized design for the irregular pipe fitting 1. It can realize the quick clamping and disassembly of parts and meet the needs of automated pressure testing of the system, thereby achieving the purpose of improving efficiency and reducing costs.

[0052] Example 2 like Figures 11-15As shown, this embodiment proposes a horizontal pressure testing line 200, which uses the differential pressure method for pipe fitting pressure testing. It includes a horizontal conveyor line, a testing fixture, and multiple clamping fixtures 100 for testing irregularly shaped pipe fittings as disclosed in Embodiment 1. The testing fixture includes a testing fixture base plate 23, a testing fixture support column 24 with its bottom on the base plate 23, a testing fixture top plate 25 with its top on the support column 24, a hollow shaft cylinder 29 on the top plate 25, and a first position sensor 33 on the base plate 23. The horizontal conveyor line includes a first transmission rail 19, a pallet drive, and multiple first transmission pallets 21 slidably mounted on the first transmission rail 19. The rail 19 passes through the base plate 23 and the top plate 25 of the testing fixture. Each of the first transmission pallets 21 is provided with a clamping fixture 100 for testing irregular pipe fittings. The clamping fixture 100 for testing irregular pipe fittings is fixed to the first transmission pallet 21 through the fixture base plate 4. The fixing method includes, but is not limited to, bolt fixing, welding, etc. The pallet drive is used to drive each first transmission pallet 21 to be conveyed along the first transmission rail 19 so as to successively transport the irregular pipe fittings 1 to be tested to the testing fixture for testing.

[0053] Some feasible implementation methods, such as Figure 11 and Figure 12 As shown, the preferred first transmission rail 19 is a closed-loop annular rail; the pallet transmission drive is located on the inner ring of the annular rail, and the pallet transmission drive includes a driving gear 31, a driven gear 34, a first chain 30, and a first motor 32. The first chain 30 is arranged in a closed loop on the driving gear 31 and the driven gear 34. The inner end of each first transmission pallet 21 (i.e., one end located on the inner ring of the annular rail) is provided with a first transmission connecting plate 22, and the first transmission connecting plate 22 is connected to the first chain 30; the output end of the first motor 32 is connected to the driving gear 31 to drive the first chain 30.

[0054] Combination Figure 13 The first transmission support plate 21 is generally rectangular, and a rectangular first transmission connecting plate 22 is provided at its inner end. The first transmission connecting plate 22 and the first transmission support plate 21 can be assembled and fixed together, or they can be integrally formed. Both the first transmission connecting plate 22 and the first transmission support plate 21 are preferably made of stainless steel. The first transmission connecting plate 22 is preferably connected to the first chain 30 by bolts or screws.

[0055] like Figure 11 and Figure 12 As shown, the driving gear 31 and the driven gear 34 have the same outer diameter and are arranged symmetrically and at intervals, transmitting power through the first chain 30. Both the first chain 30 and the first transmission rail 19 are racetrack-shaped with semicircular ends. Multiple first transmission support plates 21 are evenly distributed along the circumferential direction on the first transmission rail 19.

[0056] like Figure 13 and Figure 14 As shown, each of the first transmission trays 21 has a first transmission slider 20 at its bottom, and the first transmission tray 21 slides with the first transmission rail 19 via the first transmission slider 20. The first transmission tray 21 and the first transmission slider 20 can be assembled and connected using screws or other mounting components, or they can be directly integrally formed. The sliding engagement technology between the first transmission slider 20 and the first transmission rail 19 is prior art and will not be described in detail here.

[0057] like Figure 13 and Figure 14 As shown, to improve the transmission stability of the first transmission pallet 21, it is preferable to have two rings of the first transmission rail 19, i.e., the entire test pressure line adopts a dual-rail transmission mode. Correspondingly, the inner and outer ends of the first transmission pallet 21 are each provided with a first transmission slider 20, which slides in engagement with the inner and outer rings of the first transmission rail 19, respectively. Specifically, the four corners of the first transmission pallet 21 are each provided with a first transmission slider 20. The first transmission sliders 20 located at the two inner corners of the first transmission pallet 21 slide in engagement with the inner ring of the first transmission rail 19, while the first transmission sliders 20 located at the two outer corners of the first transmission pallet 21 slide in engagement with the outer ring of the first transmission rail 19. The test pressure line adopts a dual-rail mode, which is more stable and reliable.

[0058] In some feasible implementations, the first drive rail 19 is mounted on a workbench or workshop floor, and the first motor 32 and the first drive rail 19 are mounted on the same plane. Simultaneously, the driven gear 34 is rotatably connected to the corresponding plane using known gear mounting technology. The output end of the first motor 32 is equipped with a driving gear 31, which drives the first chain 30 to rotate.

[0059] like Figure 11 and Figure 15As shown, the testing fixture base plate 23 and the first transmission rail 19 are installed on the same plane, and the first transmission rail 19 spans across the top of the testing fixture base plate 23. The testing fixture top plate 25 is located on the top of the testing fixture base plate 23 and is supported by four testing fixture support columns 24. The hollow shaft cylinder 29 is fixed on the testing fixture top plate 25. The four corners of the guide shaft lower plate 28 are installed on the bottom surface of the testing fixture top plate 25 by four guide shafts 26. The guide shaft lower plate 28 is provided with a guide hole for the first intermediate air cylinder rod 27 of the hollow shaft cylinder 29 to move through. The guide hole and the first intermediate air cylinder rod 27 of the hollow shaft cylinder 29 are clearance fit to guide the extension and retraction of the first intermediate air cylinder rod 27 and prevent the first intermediate air cylinder rod 27 from deviating from the air inlet of the special-shaped pipe 1. The first cylinder rod 27 of the hollow shaft cylinder 29 has a hollow structure. Besides pressing the shaped pipe fitting 1, it also seals and connects with the air inlet at the top of the shaped pipe fitting 1 to inflate it for pressure testing. This is existing technology and will not be elaborated further. A first position sensor 33 is installed on the base plate 23 of the testing fixture to detect whether the first transmission support plate 21 has arrived between the base plate 23 and the top plate 25 of the testing fixture. Based on the detection signal, the first motor 32 is shut down and the hollow shaft cylinder 29 is activated to extend, inflating and pressurizing the shaped pipe fitting 1 located between the base plate 23 and the top plate 25 of the testing fixture. This ensures the orderly operation of the pressure testing line and enables continuous pressure testing of batches of pipe fittings on the pressure testing line. During continuous pressure testing, the first motor 32 adopts a periodic intermittent start-stop mode to cooperate with the hollow shaft cylinder 29 to complete the fully automatic testing of pipe fittings on the pressure testing line. The detection function of the first position sensor 33, together with the guiding function of the guide shaft lower plate 28, can ensure that the first air cylinder rod 27 and the air inlet on the special-shaped pipe 1 are aligned, thus ensuring the pressure test accuracy and efficiency.

[0060] The first position sensor 33 includes, but is not limited to, image acquisition devices, infrared sensors, proximity sensors (such as Hall effect sensors), etc. The specific sensing principle will not be described in detail here.

[0061] like Figure 11 and Figure 14 As shown, each first transmission pallet 21 is equipped with a set of clamping fixtures 100 for pressure testing of irregularly shaped pipe fittings, so as to achieve a one-to-one correspondence between the first transmission pallet 21 and the irregularly shaped pipe fitting 1. Meanwhile, as... Figure 11 and Figure 15As shown, multiple sets of hollow shaft cylinders 29 are preferably arranged at intervals along the transmission direction of the first transmission rail 19 on the top plate 25 of the preferred testing fixture. Each hollow shaft cylinder 29 corresponds to a first transmission support plate 21. Based on this, the top plate 25 of the testing fixture can simultaneously perform pressure testing on multiple irregular pipe fittings 1 on the first transmission support plates 21, further improving the pressure testing efficiency. Taking two sets of hollow shaft cylinders 29 on the top plate 25 of the testing fixture as an example, the bottom plate 23 and the top plate 25 of the testing fixture reach the two sets of first transmission support plates 21 (i.e., the two irregular pipe fittings 1 to be pressure tested) synchronously each time. After the air inlets of the two irregular pipe fittings 1 on the two sets of first transmission support plates 21 are aligned with the first air cylinder rods 27 of the two sets of hollow shaft cylinders 29, the first motor is turned off, and the first air cylinder rods 27 of the two sets of hollow shaft cylinders 29 are started to extend synchronously to achieve synchronous pressure testing of the two irregular pipe fittings 1.

[0062] In other embodiments, three or more sets of hollow shaft cylinders 29 may be provided on the top plate 25 of the testing fixture, and the structure is not limited to the two sets mentioned above. The multiple cylinders improve the testing efficiency of the pressure testing line and provide sufficient time for the cylinder rods of the hollow shaft cylinders 29 to return (so that they can extend again after the next set of pipes arrives, and so on). Compared with stopping the machine once per pipe, the multi-pipe-one-stop operation mode can improve the working efficiency of the pressure testing line, while avoiding equipment failure and reduced service life caused by too many motor stops.

[0063] During the motor shutdown and pressure testing process, the disassembly of the completed non-standard pipe fittings and the clamping of a new batch of pipe fittings can be carried out. Because the first transmission rail 19 has a long stroke, the unloading and clamping of the non-standard pipe fitting 1 can also be performed during motor startup. In practical applications, a robotic arm can be used to load and unload pipe fittings on the pressure testing line, or they can be loaded and unloaded manually.

[0064] Because the first drive rail 19 has a long stroke, multiple sets of testing fixtures can be evenly distributed along the extension direction of the first drive rail 19. Each set of testing fixtures operates synchronously, which can further improve the pressure testing efficiency.

[0065] The following is a detailed explanation of the usage and working principle of the above-mentioned horizontal pressure testing line 200.

[0066] like Figures 11-15As shown, the inner and outer rings of the first transmission linear guide 19 are fixed on the worktable. The first transmission support plate 21 is connected to the inner and outer rings of the first transmission linear guide 19 by four first transmission sliders 20. The upper surface of the first transmission support plate 21 is connected to the fixture base plate 4 with screws. The inner end of the first transmission support plate 21 is connected to the first chain 30 through the first transmission connecting plate 22. The first motor 32 is mounted on the worktable, and the output end of the first motor 32 is connected to the drive gear 31. The drive gear 31 drives the first chain 30 to rotate, thereby transmitting power. The inspection fixture is a single set and fixed on the worktable.

[0067] The robotic arm grasps the irregular pipe fitting 1 to be pressurized and mounts it onto the fixture fixing plate 14. The rotation angle is adjusted so that the protruding part of the irregular pipe fitting 1 presses against the fixture positioning block 13. Then, the fixture rotation drive 15 is activated, pressing one end of the irregular pipe fitting 1 against the fixture fixing plate 14 via the fixture clamping block 16. Next, the clamping drive 8 is vented, pushing the fixture support block 11 forward. The other end of the irregular pipe fitting 1 is held in place by the fixture clamping plate 12, completing the clamping process.

[0068] The first motor 32 rotates, driving the first transmission plate 21 to move toward the detection fixture via the first chain 30. When the first position sensor 33 installed on the base plate 23 of the detection fixture detects the position of the first transmission plate 21, the first motor 32 stops, and the hollow shaft cylinder 29 drives the first intermediate air cylinder rod 27 to move down, using the bottom end of the first intermediate air cylinder rod 27 to press against the top air inlet of the irregular tube 1 for inflation.

[0069] Differential pressure type air tightness testers sold on the market can be used to analyze whether the pipe fittings are leaking. If they pass the test, they are accepted; otherwise, they are scrapped. After the pressure test of the irregular pipe fitting 1 is completed, the first motor 32 is started. The irregular pipe fitting 1, after pressure testing, moves away from the testing fixture under the drive of the first chain 30 and moves to the next station. The unloading is assisted by a robotic arm. The unloading steps are the reverse of the clamping sequence mentioned above.

[0070] By repeating the above clamping-inspection-unloading process, non-standard pipe fittings 1 to be tested can be continuously added to the pressure testing line, ensuring the continuous operation of the pressure testing line and realizing continuous automatic pressure testing of batch pipe fittings.

[0071] Existing equipment for pressure testing pipe fittings uses fixed fixtures to clamp parts, requiring manual clamping, with one part clamped at a time for testing. Some customers have designed equipment with 4-6 testing stations, using 4-6 cylinders to press the workpieces individually for pressure testing. However, this method also uses a fixed worktable and fixtures, requiring the equipment to be stopped for loading and unloading parts. After loading and unloading the workpieces, the equipment must be manually operated to lower and raise the cylinders together. This method results in long auxiliary loading and unloading times, low efficiency, and cannot meet the pressure testing needs of large-volume products.

[0072] The aforementioned horizontal pressure testing line 200 has a simple structure. Combined with the structural design and clamping principle of the clamping fixture 100 for testing irregularly shaped pipe fittings, and the assistance of a robotic arm, it not only enables rapid loading and unloading of irregularly shaped pipe fittings 1, but also achieves automated pressure testing on a production line, thereby improving testing efficiency and reducing testing costs. The horizontal pressure testing line 200 can realize continuous pressure testing of large batches of pipe fittings, solving the problem of low testing efficiency for large-volume products.

[0073] The components of the horizontal pressure testing line 200, such as the guide rail, slider, support plate, and gears, are preferably made of stainless steel precision castings to improve the service life and durability of the pressure testing line.

[0074] The first chain 30 can also be replaced with a conveyor belt, and the corresponding driving gear 31 and driven gear can be replaced with pulleys.

[0075] Example 3 like Figures 16-21 As shown, this embodiment proposes a vertical pressure testing line 300, which uses the bubble method for pipe pressure testing. It includes a vertical conveyor line, a pressure testing fixture, and multiple clamping fixtures 100 for testing irregularly shaped pipes as disclosed in Embodiment 1. The pressure testing fixture includes a pressure testing fixture base 42, two pressure testing fixture support columns 40 with their bottoms mounted on the base 42, a pressure testing fixture connecting block 41 located inside the support columns 40, a water tank 50 located below the base 42, a top-pressure cylinder 52 located at the bottom of the water tank 50, and a second position sensor 51 located at the top opening of the water tank 50. The vertical conveyor line includes a pallet drive, a linear guide support 39 located inside the connecting block 41, and a clamping fixture 100. The second transmission rail 35 is located on the outer periphery of the rail support 39, and multiple second transmission trays 37 are slidably mounted on the second transmission rail 35. Each second transmission tray 37 is provided with a clamping fixture 100 for pressure testing of irregular pipe fittings, and the clamping fixture 100 for pressure testing of irregular pipe fittings is fixed to the second transmission tray 37 through the fixture base plate 4. The tray drive is used to drive each second transmission tray 37 to be conveyed along the second transmission rail 35 so as to successively transport the irregular pipe fittings 1 to be pressure tested into the water tank 50 for pressure testing.

[0076] In some feasible embodiments, two pressure testing fixture support columns 40 are preferably symmetrically arranged. Two pressure testing fixture connecting blocks 41 are fixed to the inner side of each pressure testing fixture support column 40. The fixing methods between the pressure testing fixture connecting blocks 41 and the pressure testing fixture support column 40 include, but are not limited to, welding and bolting. A linear guide support 39 is fixed to the pressure testing fixture connecting block 41 inside each pressure testing fixture support column 40. The linear guide support 39 is vertically arranged, and its longitudinal cross-section is a racetrack shape with semi-circular upper and lower ends. A second transmission linear guide 35 on each linear guide support 39 is arranged in a closed loop against the outer wall of the linear guide support 39, forming a racetrack-shaped annular linear guide. The fixing methods between the second transmission linear guide 35 and the linear guide support 39 include, but are not limited to, welding and bolting. The second transmission linear guides 35 on the two linear guide supports 39 are spaced apart and parallel, forming a vertical double rail.

[0077] The fixing methods between the pressure testing fixture connecting block 41 and the linear guide support 39 include, but are not limited to, welding and bolting. The two linear guide supports 39 are mounted directly above the water tank 50 via the pressure testing fixture support column 40.

[0078] In some feasible implementations, the pallet drive includes a drive shaft 47, a driven shaft 54, a sprocket 45, a second chain 44, and a second motor 48. The drive shaft 47 extends movably through the top of the two linear guide supports 39, and both ends of the drive shaft 47 are rotatably connected to the top of the two test pressure fixture support columns 40, respectively. The driven shaft 54 ​​extends movably through the bottom of the two linear guide supports 39, and both ends of the driven shaft 54 ​​are rotatably connected to the bottom of the two test pressure fixture support columns 40, respectively. Sprockets 45 are fitted on both the drive shaft 47 and the driven shaft 54. The second chain 44 is fitted in a closed loop around the sprockets 45 on the drive shaft 47 and the driven shaft 54. The second chain 44 is located between the two linear guide supports 39, and the ring diameter of the second chain 44 is smaller than the ring diameter of the second transmission linear guide 35. The bottom surface of each second transmission support plate 37 is connected to the second chain 44 via a rectangular block-shaped second transmission connecting plate 38. The second motor 48 is fixed to the outside of a test pressure fixture support column 40 via a motor bracket 49. The output end of the second motor 48 is connected to one end of the drive shaft 47 to drive the second chain 44. The drive shaft 47 is preferably keyed or welded to the sprocket 45 on it. Similarly, the driven shaft 54 ​​is preferably keyed or welded to the sprocket 45 on it.

[0079] Each of the second transmission pallets 37 has a second transmission slider 36 at its bottom, and the second transmission pallet 37 slides with two second transmission linear guides 35 via the second transmission slider 36. The second transmission pallet 37 and the second transmission slider 36 can be assembled and connected using screws or other mounting components, or they can be directly integrally formed. The sliding engagement technology between the second transmission slider 36 and the second transmission linear guides 35 is existing technology and will not be elaborated further. Specifically, the second transmission pallet 37 is generally rectangular, with a rectangular block-shaped second transmission connecting plate 38 at the center of its bottom surface. The second transmission connecting plate 38 and the second transmission pallet 37 can be assembled and fixed, or they can be integrally formed. Both the second transmission connecting plate 38 and the second transmission pallet 37 are preferably made of stainless steel. The second transmission connecting plate 38 is preferably connected to the second chain 44 using bolts or screws.

[0080] Based on the aforementioned vertical double-rail structure, it is preferable that the left and right ends of the second transmission support plate 37 are each provided with a second transmission slider 36, which slides in cooperation with the second transmission rails 35 on the two rail supports 39, respectively. Specifically, the four corners of the second transmission support plate 37 are each provided with a second transmission slider 36, wherein, for example... Figures 16-18 As shown, the second transmission sliders 36 located at the two left corners of the second transmission support plate 37 are in sliding engagement with the second transmission rails 35 on the left side rail support 39, while the second transmission sliders 36 located at the two right corners of the second transmission support plate 37 are in sliding engagement with the second transmission rails 35 on the right side rail support 39. The test pressure line adopts a dual-track mode, which is more stable and reliable.

[0081] like Figure 16 As shown, the water tank 50 is a rectangular box with an open top. The top opening is large enough and is positioned directly opposite the bottom of the linear guide support 39. The second transmission pallet 37, which reaches the bottom of the linear guide support 39, and the tooling and pipes on the pallet can smoothly enter the water tank 50 from one side of the opening and complete the bubble pressure test inside the water tank 50. After the pressure test is completed, the second transmission pallet 37 and the tooling and pipes on the pallet can be smoothly transported upward through the other side of the opening.

[0082] A second position sensor 51 is installed at the top opening of the water tank 50 to detect whether the second transmission support plate 37 has entered the water tank 50. Based on the detection signal, the second motor 48 is shut down and the top-pressure cylinder 52 is activated to extend the second intermediate air cylinder rod 53 upwards. The second intermediate air cylinder rod 53 is a hollow structure that, in addition to pressing the shaped pipe fitting 1, also connects to the air inlet of the shaped pipe fitting 1 to inflate and pressure test the shaped pipe fitting 1 inside the water tank 50. The second motor 48 and the top-pressure cylinder 52 work together to ensure the orderly operation of the pressure testing line, enabling continuous pressure testing of small batches of pipe fittings on the pressure testing line. During continuous pressure testing, the second motor 48 adopts a periodic intermittent start-stop mode to work in conjunction with the top-pressure cylinder 52 to complete the fully automatic testing of the pipe fittings on the pressure testing line.

[0083] The second position sensor 51 includes, but is not limited to, existing sensors such as image acquisition devices, infrared sensors, and proximity sensors (such as Hall effect sensors). The specific sensing principle will not be elaborated here.

[0084] like Figure 22 and Figure 23 As shown, each second transmission pallet 37 is equipped with a set of clamping fixtures 100 for pressure testing of irregularly shaped pipe fittings, so as to achieve a one-to-one correspondence between the second transmission pallet 37 and the irregularly shaped pipe fitting 1. Meanwhile, as... Figure 16 and Figure 24 As shown, a set of top pressure cylinders 52 are set at the center of the bottom of the water tank 50.

[0085] During the pressure test when the second motor 48 is stopped, the disassembly of the completed non-standard pipe fittings and the clamping of a new batch of pipe fittings can be carried out. Because the second transmission rail 35 has a long stroke, the unloading and clamping of the non-standard pipe fitting 1 can also be performed during the start-up of the second motor 48. In practical applications, it can be used in conjunction with a robotic arm for loading and unloading pipe fittings on the pressure test line, or it can be done manually.

[0086] The following is a detailed explanation of the usage and working principle of the above-mentioned vertical pressure testing line 300.

[0087] like Figures 16-21 As shown, a test pressure fixture base plate 43 is welded to the bottom of the test pressure fixture base 42. The test pressure fixture base plate 43 is fixed on the workbench. The water tank 50 is located on the test pressure fixture base plate 43. The second transmission support plate 37 is connected to the two symmetrical second transmission rails 35 by four second transmission sliders 36. The outer surface of the second transmission support plate 37 is connected to the fixture base plate 4 with screws. The inner surface of the second transmission support plate 37 is connected to the second chain 44 through the second transmission connecting plate 38. The second motor 48 is fixed to the outside of the left test pressure fixture support column 40 by the motor bracket 49. The two ends of the drive shaft 47 and the driven shaft 54 ​​are rotatably connected to the test pressure fixture support columns 40 on both sides through support bearings 46. The output end of the second motor 48 passes through the left test pressure fixture support column 40 and is connected to the drive shaft 47 to drive the second chain 44 to rotate by rotating the sprocket on the drive shaft 47, thereby realizing power transmission.

[0088] The robotic arm grasps the irregular pipe fitting 1 to be pressurized and mounts it onto the fixture fixing plate 14. The rotation angle is adjusted so that the protruding part of the irregular pipe fitting 1 presses against the fixture positioning block 13. Then, the fixture rotation drive 15 is activated, pressing one end of the irregular pipe fitting 1 against the fixture fixing plate 14 via the fixture clamping block 16. Next, the clamping drive 8 is vented, pushing the fixture support block 11 forward. The other end of the irregular pipe fitting 1 is held in place by the fixture clamping plate 12, completing the clamping process.

[0089] The second motor 48 rotates, driving the second transmission plate 37 to move downward toward the water tank 50 via the second chain 44. When the second position sensor 51 installed at the top opening of the water tank 50 detects the position of the second transmission plate 37, the second motor 48 stops. At the same time, the top pressure cylinder 52 drives its second intermediate air cylinder rod 53 to move upward, using the top of the second intermediate air cylinder rod 53 to press against the top air inlet of the irregular tube 1 and inflate it.

[0090] Water is filled into the water tank 50. During the test, the irregular pipe fitting 1 is submerged in water. If air bubbles appear in the water while the irregular pipe fitting 1 is being inflated, it indicates that the pipe fitting is leaking and the defective part is scrapped; otherwise, the pipe fitting is qualified and passes the test. After the pressure test of the irregular pipe fitting 1 is completed, the second motor 48 is started under the control of the control system. It drives the second chain 44 to move the pressure-tested irregular pipe fitting 1 away from the water tank 50 and transfer it to the next station. Then, the part is unloaded with the assistance of a robotic arm. The unloading steps are the reverse of the clamping sequence described above.

[0091] By repeating the above clamping-inspection-unloading process, non-standard pipe fittings 1 to be tested can be continuously added to the pressure testing line, ensuring the continuous operation of the pressure testing line and realizing continuous automatic pressure testing of batch pipe fittings.

[0092] Existing equipment for pressure testing pipe fittings uses fixed fixtures to clamp parts, requiring manual clamping, with one part clamped at a time for testing. Some customers have designed equipment with 4-6 testing stations, using 4-6 cylinders to press the workpieces individually for pressure testing. However, this method also uses a fixed worktable and fixtures, requiring the equipment to be stopped for loading and unloading parts. After loading and unloading the workpieces, the equipment must be manually operated to lower and raise the cylinders together. This method results in long auxiliary loading and unloading times, low efficiency, and cannot meet the pressure testing needs of large-volume products.

[0093] The aforementioned vertical pressure testing line 300 has a simple structure. Combined with the structural design and clamping principle of the clamping fixture 100 for testing irregularly shaped pipe fittings, and the assistance of a robotic arm, it not only enables rapid loading and unloading of irregularly shaped pipe fittings 1, but also achieves automated pressure testing on a production line, thereby improving testing efficiency and reducing testing costs. The horizontal pressure testing line 200 can achieve continuous pressure testing of large batches of pipe fittings, solving the problem of low testing efficiency for large-volume products.

[0094] The components of the vertical pressure testing line 300, such as the guide rail, slider, support plate, and sprocket, are preferably made of stainless steel precision castings to improve the service life and durability of the pressure testing line.

[0095] Compared to the horizontal pressure testing line 200, the vertical pressure testing line 300 occupies less space and is suitable for small workshops or sites. However, due to its vertical structure and the volume of the water tank 50, the vertical pressure testing line 300 can only perform pressure testing on a single pipe fitting at a time. Although the pressure testing efficiency is improved compared to the prior art, it is still not as good as that of Example 2.

[0096] The second chain 44 can also be replaced with a conveyor belt, and the corresponding sprocket can be replaced with a pulley.

[0097] It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and to facilitate understanding. They are not intended to limit the scope of the invention and therefore have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of the invention, should still fall within the scope of the technical content disclosed herein. Furthermore, the terms "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and not intended to limit the scope of the invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of the invention's implementation.

[0098] Specific examples have been used to illustrate the principles and implementation methods of this invention. The descriptions of the above embodiments are only for the purpose of helping to understand the method and core ideas of this invention. Furthermore, those skilled in the art will recognize that, based on the ideas of this invention, there will be changes in the specific implementation methods and application scope. Therefore, the content of this specification should not be construed as a limitation of this invention.

Claims

1. A clamping fixture for pressure testing of irregularly shaped pipe fittings, characterized in that, It can be used for clamping irregularly shaped pipe fittings, wherein there is a spatial corner between the two end faces of the irregularly shaped pipe fittings; The clamping fixture for pressure testing of the irregular-shaped pipe fittings includes: The tooling base includes a tooling base plate and a tooling upright plate fixed at an angle to the tooling base plate; The clamping assembly includes an angle support wedge block disposed on the tooling base plate, a tooling clamping plate slidably mounted on the top inclined surface of the angle support wedge block, and a tooling fixing plate disposed on the tooling upright plate. A spatial angle adapted to the irregular pipe fitting is formed between the tooling clamping plate and the tooling fixing plate. A clamping drive is provided on the tooling base plate or the angle support wedge block. The clamping drive is connected to the tooling clamping plate and is used to drive the tooling clamping plate to press the irregular pipe fitting to be tested onto the tooling fixing plate.

2. The clamping fixture for pressure testing of irregularly shaped pipe fittings according to claim 1, characterized in that, It also includes a positioning component, the positioning component comprising: A tooling positioning block is disposed on the tooling upright plate and located on one side of the tooling fixing plate. The tooling positioning block is used to position the end of the special-shaped pipe fitting to be tested. The clamping unit includes a tooling angle drive and a tooling clamping block. The tooling angle drive is disposed on the tooling upright plate, and the tooling clamping block is fixed to the output end of the tooling angle drive. The tooling angle drive is used to drive the tooling clamping block to rotate and switch between a fixed position and a disassembled position. When the tooling clamping block is in the fixed position, it can clamp the end of the irregular pipe fitting. When the tooling clamping block is in the disassembled position, it is away from the irregular pipe fitting. Multiple sets of the clamping units are arranged on the outer periphery of the tooling fixing plate.

3. The clamping fixture for pressure testing of irregularly shaped pipe fittings according to claim 1 or 2, characterized in that, The outer wall of the tooling fixing plate is provided with an outer support platform for the tooling fixing plate, and the first end face of the irregular pipe fitting is provided with an end face sealing groove that is compatible with the concave and convex shape of the outer support platform of the tooling fixing plate.

4. The clamping fixture for pressure testing of irregularly shaped pipe fittings according to claim 1 or 2, characterized in that, The end face of the tooling clamping plate is provided with a sealing groove, the second end of the special-shaped pipe is used to be inserted into the sealing groove, and the inner wall of the second end port of the special-shaped pipe is provided with an inner support platform that matches the inner step of the sealing groove.

5. The clamping fixture for pressure testing of irregularly shaped pipe fittings according to claim 1 or 2, characterized in that, The angle support wedge is arranged at an acute angle to the tooling upright plate; the top inclined surface of the angle support wedge is arranged from high to low along the direction away from the tooling upright plate; The top of the top slope is recessed to form a recessed slope parallel to the top slope. A tooling slide rail is provided on the recessed slope along the inclination direction of the top slope. A tooling slider is slidably mounted on the tooling slide rail. A tooling support block is fixed on the tooling slider. The tooling clamping plate is fixed on the tooling support block. A tooling support plate is provided at the bottom of the top slope, and the clamping drive is fixed on the tooling support plate and connected to the tooling slider or the tooling support block.

6. The clamping fixture for pressure testing of irregularly shaped pipe fittings according to claim 1 or 2, characterized in that, The clamping drive is a pneumatic cylinder, a hydraulic cylinder, or an electric cylinder.

7. A horizontal pressure testing line, characterized in that, The differential pressure method is used for pressure testing of pipe fittings, which includes a horizontal conveyor line, testing fixtures, and clamping fixtures for pressure testing of irregularly shaped pipe fittings as described in any one of claims 1 to 6, wherein: The testing fixture includes a testing fixture base plate, a testing fixture support column with its bottom set on the testing fixture base plate, a testing fixture top plate set on the top of the testing fixture support column, a hollow shaft cylinder set on the testing fixture top plate, and a first position sensor set on the testing fixture base plate. The horizontal conveyor line includes a first transmission rail, a pallet drive, and multiple first transmission pallets slidably mounted on the first transmission rail. The first transmission rail passes between the bottom plate and the top plate of the testing fixture. Each of the first transmission pallets is provided with a clamping fixture for testing irregular pipe fittings, and the clamping fixture for testing irregular pipe fittings is fixed to the first transmission pallet through the fixture bottom plate. The pallet drive is used to drive each of the first transmission pallets to be conveyed along the first transmission rail, so as to successively transport the irregular pipe fittings to be tested to the testing fixture for testing.

8. The horizontal pressure testing line according to claim 7, characterized in that, The first transmission rail is a closed-loop annular rail; the pallet transmission drive is disposed on the inner ring of the annular rail, and the pallet transmission drive includes: Driving gear and driven gear; The first chain is looped around the driving gear and the driven gear in a closed loop, and the inner end of each of the first transmission plates is connected to the first chain. The first motor has its output end connected to the drive gear to drive the first chain drive.

9. A vertical pressure testing line, characterized in that, The method of pressure testing pipe fittings using the bubble method includes a vertical conveyor line, a pressure testing fixture, and a clamping fixture for pressure testing of irregularly shaped pipe fittings as described in any one of claims 1 to 6, wherein: The pressure testing fixture includes a pressure testing fixture base, a pressure testing fixture support column with its bottom set on the pressure testing fixture base, a pressure testing fixture connecting block set inside the pressure testing fixture support column, a water tank set below the pressure testing fixture base, a top pressure cylinder set inside the water tank, and a second position sensor set at the top opening of the water tank. The vertical conveyor line includes a pallet drive, a linear guide support disposed inside the connecting block of the pressure testing fixture, a second transmission linear guide disposed on the outer periphery of the linear guide support, and a plurality of second transmission pallets slidably mounted on the second transmission linear guide. Each of the second transmission pallets is provided with a clamping fixture for pressure testing of the irregular pipe fitting, and the clamping fixture for pressure testing of the irregular pipe fitting is fixed to the second transmission pallet through the fixture base plate. The pallet drive is used to drive each of the second transmission pallets to be conveyed along the second transmission linear guide, so as to successively transport the irregular pipe fitting to be pressure tested into the water tank for pressure testing.

10. The vertical pressure testing line according to claim 9, characterized in that, The second transmission rail is a closed-loop annular rail; the pallet transmission drive includes: The drive shaft extends through the top of both of the linear guide supports, and the two ends of the drive shaft are rotatably connected to the top of the two test pressure fixture support columns, respectively. The driven shaft extends through the bottom of the two linear guide supports, and the two ends of the driven shaft are rotatably connected to the bottom of the two test pressure fixture support columns, respectively. A sprocket is fitted onto both the drive shaft and the driven shaft. The second chain is looped around the sprocket on the drive shaft and the sprocket on the driven shaft, and the bottom surface of each of the second transmission plates is connected to the second chain. The second motor is fixed to the support column of the test fixture by a motor bracket. The output end of the second motor is connected to the drive shaft to drive the second chain drive.

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