Circumferential torque testing device for steel-plastic conversion pipe fitting
By designing a combination of hydraulic pipe wrench, adjustable telescopic lever, and digital torque wrench, the problem of quantitatively evaluating the torque resistance of steel-plastic conversion pipe fittings was solved, thus improving accuracy and safety.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-13
- Publication Date
- 2026-03-24
AI Technical Summary
Existing technologies lack effective devices and methods to quantitatively evaluate the torque resistance of steel-plastic conversion pipe fittings, leading to frequent circumferential twisting of pipe fittings at construction sites, which affects long-term sealing performance.
A circumferential torque testing device was designed, comprising a hydraulic pipe wrench, an adjustable telescopic lever, a digital torque wrench measuring mechanism, a pressure plate structure, and a mandrel. Measurement errors are eliminated through directional grooves and anti-slip pads, ensuring that pipe fittings are securely fixed and improving accuracy and safety.
It enables precise torque testing of steel-plastic conversion pipe fittings, reduces measurement errors, improves the safety of the device and the fixing reliability of the pipe fittings, and adapts to the testing needs of different workpieces.
Smart Images
Figure CN224035156U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to pipe fitting torque testing device technical field, specifically relates to a kind of circumferential torque testing device for steel-plastic conversion pipe fitting. BACKGROUND
[0002] Steel-plastic conversion pipe fitting is mainly composed of three parts, respectively metal piece (including sealing groove structure), plastic piece, locking ring / inner support ring, since three parts are cylindrical structure, steel-plastic combination site is connected by buckling, therefore, when being subjected to circumferential action, the risk of circumferential rotation is generated, while being influenced by the complexity of working condition, pipe fitting circumferential twist phenomenon often occurs, can seriously affect the long-term sealing performance of pipe fitting.Although anti-torque structure is developed, for example, groove is set on the end face of steel-plastic combination site, or the interference fit amount of plastic piece of buckling site is increased, but the anti-torque performance of pipe fitting is not quantitatively evaluated, and the detection device and method research for the anti-torque performance of steel-plastic conversion pipe fitting is less in the industry. SUMMARY
[0003] In view of the above problems, the utility model aims at providing a kind of circumferential torque testing device for steel-plastic conversion pipe fitting.
[0004] The specific technical solutions are as follows:
[0005] A kind of circumferential torque testing device for steel-plastic conversion pipe fitting, including hydraulic pipe tongs, adjustable telescopic force rod and digital torque wrench measuring mechanism, adjustable telescopic force rod includes fixed force rod, movable force rod and fixed bolt, one end of fixed force rod is fixedly connected with hydraulic pipe tongs, the other end is inserted into adjustable connection with one end of movable force rod, first through hole is uniformly set on fixed force rod and movable force rod respectively, fixed bolt is inserted into first through hole to realize the connection of fixed force rod and movable force rod, the other end of movable force rod is fixedly connected with digital torque wrench measuring mechanism, hydraulic pipe tongs clamps the metal pipe fitting of steel-plastic conversion pipe fitting, clamps rotation to measure torque force.
[0006] Further, the end of movable force rod connected with digital torque wrench measuring mechanism is provided with a limiting groove.
[0007] Further, steel-plastic rotating pipe fitting includes metal pipe fitting, locking ring and plastic pipe fitting, one end of metal pipe fitting is inserted into one end of plastic pipe fitting, and locking ring is arranged at the socket.
[0008] Further, it further includes pressure plate structure for preventing plastic pipe fitting from rotating and core rod inserted into plastic pipe fitting for supporting plastic pipe fitting.
[0009] Further, the second through hole is arranged on the plastic pipe, the insertion hole is arranged on the core rod, the pressure plate structure comprises an upper pressure plate and a lower pressure plate, the upper pressure plate and the lower pressure plate are connected to form a whole, and are arranged on the outer surface of the plastic pipe and press the plastic pipe; the lower surface of the upper pressure plate is vertically provided with a guide column, the guide column passes through the second through hole and is inserted into the insertion hole to limit the plastic pipe.
[0010] Further, the inner wall of the hydraulic pipe tongs is provided with an antiskid pad to prevent the hydraulic pipe tongs from slipping during the clamping and rotating process.
[0011] The utility model has the advantages that:
[0012] 1) The utility model has a telescopic force rod with adjustable function, large range, and can meet the test requirements of different workpieces.
[0013] 2) The utility model is provided with a limiting groove at the end of the telescopic vertical rod, which can eliminate measurement error and improve accuracy; at the same time, the test device rotates along the direction of the limiting groove, prevents excessive stress during rotation, and improves the safety factor of the device.
[0014] 3) The utility model has a multi-section detachable structure, is convenient to store, and has good secondary modification performance.
[0015] 4) The utility model fixes the pipe firmly through the pressure plate structure and the inner supporting core rod, and has smaller test error. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1 It is a three-dimensional structure schematic view of the utility model.
[0017] In the figure: 1, hydraulic pipe tongs; 2, adjustable telescopic force rod; 21, fixed force rod; 22, movable force rod; 23, fixed bolt; 24, first through hole; 3, digital display torque wrench measuring mechanism; 4, metal pipe; 5, limiting groove; 6, locking ring; 7, plastic pipe; 71, second through hole; 8, pressure plate structure; 81, upper pressure plate; 811, guide column; 82, lower pressure plate; 9, core rod; 91, insertion hole. DETAILED DESCRIPTION
[0018] The utility model will be further described below in conjunction with the drawings of the specification, but the protection scope of the utility model is not limited to this.
[0019] For example, Figure 1The steel plastic rotary pipe fitting includes a metal pipe fitting 4, a locking ring 6 and a plastic pipe fitting 7, one end of the metal pipe fitting 4 is inserted into one end of the plastic pipe fitting 7, and the locking ring 6 is arranged at the inserted end. A circumferential torque testing device for a steel plastic conversion pipe fitting includes a hydraulic pipe wrench 1, an adjustable telescopic force rod 2, a digital torque wrench measuring mechanism 3, a pressure plate structure 8 and a core rod 9, wherein the digital torque wrench measuring mechanism 3 is a conventional digital torque wrench structure, similar to the countable display torque wrench described in the patent CN1640625A. The adjustable telescopic force rod 2 includes a fixed force rod 21, a movable force rod 22 and a fixed bolt 23, one end of the fixed force rod 21 is fixedly connected with the hydraulic pipe wrench 1, the other end is adjustably connected with one end of the movable force rod 22 in a plug-in mode, first through holes 24 are uniformly arranged on the fixed force rod 21 and the movable force rod 22 respectively, the fixed bolt 23 is inserted into the first through holes 24 to realize the connection of the fixed force rod 21 and the movable force rod 22, the other end of the movable force rod 22 is fixedly connected with the digital torque wrench measuring mechanism 3, the inner wall of the hydraulic pipe wrench 1 is provided with an anti-skid pad, the hydraulic pipe wrench 1 clamps the metal pipe fitting 4 of the steel plastic conversion pipe fitting, a limiting groove 5 is arranged on the end of the movable force rod 22 connected with the digital torque wrench measuring mechanism 3, the limiting groove 5 is a U-shaped open groove, during the testing process, the limiting groove 5 faces upward, and force is applied in the same direction of the opening instead of other directions, which not only eliminates the measurement error caused by the weight of the tool, but also avoids operation errors, and prevents the tool from generating excessive internal stress, a second through hole 71 is arranged on the plastic pipe fitting 7, and an insertion hole 91 is arranged on the core rod 9, the core rod 9 is inserted into the plastic pipe fitting 7 for internally supporting the plastic pipe fitting 7, the pressure plate structure 8 includes an upper pressure plate 81 and a lower pressure plate 82, which are connected to form a whole, and are arranged on the outer surface of the plastic pipe fitting 7 and press the plastic pipe fitting 7, a guide column 811 is vertically arranged on the lower surface of the upper pressure plate 81, the guide column 811 penetrates through the second through hole 71 and is inserted into the insertion hole 91 to limit the plastic pipe fitting 7, preventing the plastic pipe fitting 7 from rotating during the testing process, and at the same time, the pressure plate structure 8 applies pressure to the outside of the plastic pipe fitting 7, during the testing process, the plastic pipe fitting 7 is pressed by the pressure plate structure 8, the metal pipe fitting 4 is clamped by the hydraulic pipe wrench 1 of the testing device, then the testing device is rotated along the setting direction of the limiting groove 5, and the torque force is tested by the digital torque wrench measuring mechanism 3.
Claims
1. A circumferential torque testing device for steel-to-plastic transition pipe fittings, characterized by, The utility model relates to a kind of steel-plastic rotating pipe fittings, including hydraulic pipe wrench (1), adjustable telescopic force rod (2) and digital display torque wrench measuring mechanism (3), adjustable telescopic force rod (2) includes fixed force rod (21), movable force rod (22) and fixed bolt (23), one end of fixed force rod (21) is fixedly connected with hydraulic pipe wrench (1), and other end is with the one end of movable force rod (22) insertion type adjustable connection, fixed force rod (21) and movable force rod (22) are respectively evenly provided with first through-hole (24), fixed bolt (23) is inserted into first through-hole (24) to realize the connection of fixed force rod (21) and movable force rod (22), and the other end of movable force rod (22) is fixedly connected with digital display torque wrench measuring mechanism (3), and hydraulic pipe wrench (1) clamps the metal pipe fitting (4) of steel-plastic rotating pipe fitting, clamps rotation to measure torque force.
2. A circumferential torque testing device for steel-to-plastic transition pipe fittings as defined in claim 1, wherein, The end of movable force rod (22) connected with digital display torque wrench measuring mechanism (3) is provided with limiting groove (5).
3. A circumferential torque testing device for steel-to-plastic transition pipe fittings as defined in claim 2, wherein Steel-plastic rotating pipe fitting includes metal pipe fitting (4), locking ring (6) and plastic pipe fitting (7), one end of metal pipe fitting (4) is inserted into one end of plastic pipe fitting (7), and locking ring (6) is arranged at the socket.
4. A circumferential torque testing device for steel-to-plastic transition pipe fittings as defined in claim 3, wherein It further includes pressure plate structure (8) for preventing plastic pipe fitting (7) from rotating and core rod (9) inserted into plastic pipe fitting (7) for supporting plastic pipe fitting (7) from inside.
5. A circumferential torque testing device for a steel-to-plastic transition fitting as defined in claim 4, wherein, Second through-hole (71) is opened on plastic pipe fitting (7), and insertion hole (91) is opened on core rod (9), and pressure plate structure (8) includes upper pressure plate (81) and lower pressure plate (82), and upper pressure plate (81) and lower pressure plate (82) are connected to constitute a whole, and are arranged on the outer surface of plastic pipe fitting (7) and extrude plastic pipe fitting (7), and the lower surface of upper pressure plate (81) is vertically provided with guide column (811), guide column (811) passes through second through-hole (71) and is inserted into insertion hole (91) to realize the limiting of plastic pipe fitting (7).
6. A circumferential torque testing device for steel-to-plastic transition pipe fittings as defined in claim 1, wherein, The inner wall of hydraulic pipe wrench (1) is provided with antiskid pad.