An automated recyclable hydrostatic test device for ductile iron pipe fittings and its usage method

Abstract

The present invention discloses an automated recyclable hydrostatic test device for ductile iron pipe fittings and its usage method, which includes a bracket and a fixed clamping mechanism capable of fixing ductile iron pipe fittings. On the surface of the bracket, a locking and pressurizing mechanism is symmetrically arranged, which can lock the ductile iron pipe fittings and inject a large amount of water inward. The fixed clamping mechanism includes an arc-shaped groove, an oil groove is arranged inside the arc-shaped groove, and a plurality of locking blocks are arranged in a circumferential array at the clamping end of the oil groove. The locking and pressurizing mechanism includes a water inlet test head. The whole is synchronously pressurized through two water inlet test heads, with higher test efficiency. Moreover, the water is recycled by means of gravity, and the recycling cost is lower, so the overall operation cost will also be reduced. And the whole realizes a pipeline-type feeding, testing and discharging process, with higher overall test efficiency, and can conduct hydrostatic tests on a large number of ductile iron pipe fittings for a long time.

Description

Technical Field

[0001] The present invention relates to an automatic recyclable hydrostatic test device for ductile iron pipe fittings and a method for using the same. Background Art

[0002] The pipe made of foundry molten iron above No. 18 after adding spheroidizing agent and centrifugally cast at high speed by a centrifugal ductile iron casting machine is called "ductile iron pipe", which is simply referred to as ductile pipe, ductile iron pipe and ductile iron cast pipe, etc. After annealing, the metallographic structure of the ductile iron pipe is ferrite plus a small amount of pearlite, with good mechanical properties, excellent anti-corrosion performance, good ductility, good sealing effect and easy installation.

[0003] Ductile iron pipe fittings are usually made through three steps: molten iron preparation, centrifugal casting and finishing. Especially in the hydrostatic test of the finishing step, it is the most important inspection link before leaving the factory, which is a test of its ductility and sealing performance, and also the most important process for detecting the quality of ductile iron pipe fittings.

[0004] However, the existing hydrostatic test device has the following disadvantages during the test: during the overall use, a large amount of water will be wasted due to the hydrostatic test. The existing water recovery needs to rely on other equipment for recovery, and the recovery cost is relatively high. Moreover, the overall continuity is long, which consumes a lot of time for the test of a large number of ductile iron pipe fittings. Summary of the Invention

[0005] The purpose of the present invention is to provide an automatic recyclable hydrostatic test device for ductile iron pipe fittings and a method for using the same, so as to solve the problems raised in the above background art.

[0006] To solve the above technical problems, the present invention provides the following technical solutions: including a bracket and a fixed clamping mechanism capable of fixing ductile iron pipe fittings, and a locking and pressurizing mechanism capable of locking ductile iron pipe fittings and adding a large amount of water inward is symmetrically arranged on the surface of the bracket;

[0007] The fixed clamping mechanism includes an arc-shaped groove, an oil groove is arranged inside the arc-shaped groove, and a plurality of locking blocks are arranged in a circumferential array at the clamping end of the oil groove;

[0008] The locking and pressurizing mechanism includes a water inlet test head, and a folding sealing film capable of deforming under the extrusion of water pressure and fitting the ductile iron pipe fitting is arranged at the output end of the water inlet test head.

[0009] Preferably, electric push rods are symmetrically arranged on the surface of the bracket, a connecting pipe is arranged at the power output end of the electric push rod surface, and the water inlet test head is arranged on the surface of the connecting pipe.

[0010] Preferably, an extrusion sealing groove is arranged at the sealing end of the water inlet test head surface.

[0011] Preferably, a water reservoir is provided on the surface of the bracket. A high-pressure water pump is provided at the extraction end of the water reservoir. A water inlet pipe is provided at the output end of the high-pressure water pump. The connecting pipe is arranged on the surface of the water inlet pipe.

[0012] Preferably, a protruding block is provided on one side of the surface of the water reservoir. A support rod is provided on the upper surface of the protruding block.

[0013] Preferably, a transmission rod is arranged inside the support rod, and the lower surface of the transmission rod penetrates through the protruding block. A servo motor is arranged on the surface of the transmission rod.

[0014] Preferably, an inductor is provided on the lower surface of the protruding block. A pointer is arranged at a position corresponding to the inductor on the surface of the transmission rod.

[0015] Preferably, a turntable is arranged at the power output end of the transmission rod. Four cross bars are arranged in a circumferential array on the surface of the turntable. The arc-shaped groove is arranged on the surface of the cross bar.

[0016] Preferably, a hydraulic cylinder is arranged inside the cross bar. The oil groove is arranged on the surface of the hydraulic cylinder.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] 1. The present invention seals the ductile iron pipe fittings from the outside by squeezing the sealing groove, and forces the folding sealing film to deform by water pressure extrusion, so that it fits inside the pipeline to form a seal from the inside. The overall sealing performance is stronger through the double-sealing structure, and the test is more accurate. The whole is synchronously pressurized through two water inlet test heads, and the test efficiency is higher. And the water is recycled by means of gravity, and the recycling cost is lower, so the overall operating cost will also be reduced;

[0019] 2. The present invention drives the rotation of the arc-shaped groove through the servo motor, and accurately positions the rotation angle of the ductile iron pipe fittings under the cooperation of the pointer and the inductor. Finally, under the combined action of the hydraulic cylinder and the locking block to lock or release the ductile iron pipe fittings, the overall feeding, testing and discharging processes in a pipeline manner are finally realized, and the overall test efficiency is relatively high, and the hydrostatic test can be carried out on a large number of ductile iron pipe fittings for a long time. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is the overall structural schematic diagram of the embodiment of the present invention;

[0021] Figure 2 is the bottom view structural schematic diagram of the embodiment of the present invention;

[0022] Figure 3 is the structural schematic diagram of the fixed clamping mechanism of the embodiment of the present invention;

[0023] Figure 4 Schematic structural diagram of the water inlet test head according to an embodiment of the present invention;

[0024] Figure 5 Schematic top view structure diagram according to an embodiment of the present invention.

[0025] In the figure: 1, water storage tank; 2, bracket; 301, electric push rod; 302, connecting pipe; 303, water inlet pipe; 304, water inlet test head; 305, folding sealing film; 306, extrusion sealing groove; 4, high-pressure water pump; 5, protruding block; 6, support rod; 7, turntable; 801, cross bar; 802, hydraulic cylinder; 803, oil tank; 804, locking block; 805, arc groove; 9, servo motor; 10, transmission rod; 11, pointer; 12, inductor. Detailed implementation manners

[0026] In order to facilitate the solution of the problems of high existing water recovery cost and low test efficiency, the present invention provides an automated recyclable hydrostatic test device for ductile iron pipe fittings and its usage method. The technical solutions in the present invention will be clearly and completely described below with reference to the accompanying drawings in the present invention. Obviously, the described invention is only a part of the invention of the present invention, rather than all of the invention. All other inventions obtained by those of ordinary skill in the art based on the invention in the present invention without creative efforts shall fall within the protection scope of the present invention.

[0027] Please refer to Figures 1-5 , the present invention provides an automated recyclable hydrostatic test device for ductile iron pipe fittings, including a bracket 2 and a fixed clamping mechanism capable of fixing ductile iron pipe fittings. The surface of the bracket 2 is symmetrically provided with a locking and pressurizing mechanism capable of locking ductile iron pipe fittings and adding a large amount of water inward;

[0028] The fixed clamping mechanism includes an arc groove 805. An oil tank 803 is arranged inside the arc groove 805. A plurality of locking blocks 804 are arranged in a circumferential array at the clamping end of the oil tank 803;

[0029] The locking and pressurizing mechanism includes a water inlet test head 304. A folding sealing film 305 that can be deformed under the action of water pressure and fit the ductile iron pipe fittings is arranged at the output end of the water inlet test head 304.

[0030] Furthermore, electric push rods 301 are symmetrically arranged on the surface of the bracket 2. A connecting pipe 302 is arranged at the power output end of the surface of the electric push rod 301. The water inlet test head 304 is arranged on the surface of the connecting pipe 302; The electric push rod 301 provides power and extrusion force, and the water inlet test head 304 is connected to the electric push rod 301 through the connecting pipe 301.

[0031] Further, an extrusion sealing groove 306 is provided at the surface sealing end of the water inlet test head 304; the outer surface of the ductile iron pipe fitting is extruded and sealed through the extrusion sealing groove 306.

[0032] Further, a water storage tank 1 is provided on the surface of the bracket 2, a high-pressure water pump 4 is provided at the extraction end of the water storage tank 1, a water inlet pipe 303 is provided at the output end of the high-pressure water pump 4, and the connecting pipe 302 is arranged on the surface of the water inlet pipe 303; the water in the water storage tank 1 is extracted by the high-pressure water pump 4 and supplied to the connecting pipe 302 through the water inlet pipe 303.

[0033] Further, a protruding block 5 is provided on one side of the surface of the water storage tank 1, and a support rod 6 is provided on the upper surface of the protruding block 5; the support rod 6 is supported by the protruding block 5.

[0034] Further, a transmission rod 10 is arranged inside the support rod 6, and the lower surface of the transmission rod 10 penetrates through the protruding block 5, and a servo motor 9 is arranged on the surface of the transmission rod 10; the transmission rod 10 is driven to rotate by the servo motor 9.

[0035] Further, an inductor 12 is provided on the lower surface of the protruding block 5, and a pointer 11 is arranged at a position corresponding to the inductor 12 on the surface of the transmission rod 10; the position of the pointer 11 is sensed by the inductor 12 to make the overall rotation positioning more accurate.

[0036] Further, a turntable 7 is arranged at the power output end of the transmission rod 10, four cross bars 801 are arranged in a circumferential array on the surface of the turntable 7, and an arc-shaped groove 805 is arranged on the surface of the cross bar 801; the cross bar 801 is driven to rotate by the turntable 7, so as to drive the arc-shaped groove 805 to rotate, and finally realize the transportation of the ductile iron pipe fitting.

[0037] Further, a hydraulic cylinder 802 is arranged inside the cross bar 801, and an oil groove 803 is arranged on the surface of the hydraulic cylinder 802; the oil in the oil groove 803 is driven to move by the hydraulic cylinder 802 to drive the locking block 804 to move.

[0038] Specific usage method:

[0039] Step A, Preparation: Set the feeding end of the ductile iron pipe fitting directly opposite to the bracket 2, set the discharging end of the ductile iron pipe fitting at the right side of the water storage tank 1 perpendicular to the protruding block 5, and add an appropriate amount of water to the water storage tank 1;

[0040] Step B: Locking and blanking: The arc-shaped groove 805 clamps the ductile iron pipe fitting. Start the hydraulic cylinder 802. The hydraulic cylinder 802 supplies oil to the oil tank 803, thereby pushing the locking block 804 on the surface of the oil cylinder to move outward, and finally locking the ductile iron pipe fitting. After the ductile iron pipe fitting is transported to the blanking position, operate the hydraulic cylinder 802 in reverse, so that the locking block 804 retracts, which facilitates the blanking machine to pick up the material;

[0041] Step C: Conveying and feeding: The servo motor 9 drives the transmission rod 10 to rotate, thereby driving the turntable 7 to rotate, and then driving the arc-shaped groove 805 on the surface of the turntable 7 to rotate. Finally, the arc-shaped groove 805 of the locked ductile iron pipe fitting is driven to rotate. And under the combined action of the pointer 11 and the inductor 12, the transportation of the ductile iron pipe fitting will be accurately positioned, so as to realize feeding, testing, and blanking;

[0042] Step D: Testing: When the ductile iron pipe fitting is transported to the bracket 2, start the electric push rod 301. The two electric push rods 301 insert the folding sealing film 305 and the water inlet test head 304 into the ductile iron pipe fitting, and insert the extrusion sealing groove 306 into the surface of the ductile iron pipe fitting. Start the high-pressure water pump 4 to conduct a water pressure test by pumping water from the water storage tank 1;

[0043] Step E: Water recovery: After the test is completed, retract the electric push rod 301, so that the folding sealing film 305 and the water inlet test head 304 are withdrawn from the inside of the ductile iron pipe fitting, and the extrusion sealing groove 306 is also separated from the surface of the ductile iron pipe fitting. Under the action of gravity, the water is recovered.

[0044] An automatic recyclable water pressure test device for ductile iron pipe fittings and its use method of the present invention have the following advantages:

[0045] 1. The present invention seals the ductile iron pipe fitting from the outside through the extrusion sealing groove 306, and forces the folding sealing film 305 to deform by water pressure extrusion, so that it fits inside the pipeline to form a seal from the inside. Through the double-sealing structure, the overall sealing performance is stronger, the test is more accurate, the whole is pressurized synchronously through two water inlet test heads 304, the test efficiency is higher, and the water is recovered by means of gravity, and the recovery cost is lower, so the overall operation cost will also be reduced;

[0046] 2. The present invention drives the arc-shaped groove 805 to rotate through the servo motor 9, accurately positions the rotation angle of the ductile iron pipe fitting under the combined action of the pointer 11 and the inductor 12, and finally under the combined action of the hydraulic cylinder 802 and the locking block 804 to lock or release the ductile iron pipe fitting, finally realizing a pipeline-type feeding, testing and blanking process, with a relatively high overall test efficiency, and can conduct water pressure tests on a large number of ductile iron pipe fittings for a long time.

[0047] Although the inventions of the present invention have been shown and described, it will be understood by those of ordinary skill in the art that various changes, modifications, substitutions and variations can be made to these inventions without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A method for using an automated recyclable hydrostatic test device for ductile iron pipe fittings, characterized in that: The test device: includes a bracket (2) and a fixed clamping mechanism capable of fixing ductile iron pipe fittings. On the surface of the bracket (2), a locking and pressurizing mechanism is symmetrically arranged, which can lock the ductile iron pipe fittings and add a large amount of water inward; The fixed clamping mechanism includes an arc groove (805). Inside the arc groove (805), an oil groove (803) is arranged. At the clamping end of the oil groove (803), a plurality of locking blocks (804) are arranged in a circumferential array; The locking and pressurizing mechanism includes a water inlet test head (304). At the output end of the water inlet test head (304), a folding sealing film (305) is arranged, which can be deformed under the extrusion of water pressure to fit the ductile iron pipe fittings; On the surface of the bracket (2), electric push rods (301) are symmetrically arranged. At the power output end of the surface of the electric push rods (301), a connecting pipe (302) is arranged. The water inlet test head (304) is arranged on the surface of the connecting pipe (302); At the sealing end of the surface of the water inlet test head (304), an extrusion sealing groove (306) is arranged; On the surface of the bracket (2), a water storage tank (1) is arranged. At the extraction end of the water storage tank (1), a high-pressure water pump (4) is arranged. At the output end of the high-pressure water pump (4), a water inlet pipe (303) is arranged. The connecting pipe (302) is arranged on the surface of the water inlet pipe (303); On one side of the surface of the water storage tank (1), a protruding block (5) is arranged. On the upper surface of the protruding block (5), a support rod (6) is arranged; Inside the support rod (6), a transmission rod (10) is arranged, and the lower surface of the transmission rod (10) penetrates through the protruding block (5). On the surface of the transmission rod (10), a servo motor (9) is arranged; On the lower surface of the protruding block (5), a sensor (12) is arranged. At the position corresponding to the sensor (12) on the surface of the transmission rod (10), a pointer (11) is arranged; At the power output end of the transmission rod (10), a turntable (7) is arranged. On the surface of the turntable (7), four cross bars (801) are arranged in a circumferential array. The arc groove (805) is arranged on the surface of the cross bar (801); Inside the cross bar (801), a hydraulic cylinder (802) is arranged. The oil groove (803) is arranged on the surface of the hydraulic cylinder (802); The usage method includes the following steps: Step (A), Preparation: Set the feeding end of the ductile iron pipe fitting opposite to the bracket (2), set the discharging end of the ductile iron pipe fitting at the right side of the water storage tank (1) perpendicular to the protruding block (5), and add an appropriate amount of water into the water storage tank (1); Step (B), Locking and discharging: The arc groove (805) clamps the ductile iron pipe fitting. Start the hydraulic cylinder (802). The hydraulic cylinder (802) supplies oil into the oil groove (803) to push the locking block (804) on the surface of the oil cylinder to move outward, and finally lock the ductile iron pipe fitting. After the ductile iron pipe fitting is transported to the discharging position, operate the hydraulic cylinder (802) in reverse to retract the locking block (804), so as to facilitate the feeding machine to take the material; Step (C), conveying and loading: The servo motor (9) drives the transmission rod (10) to rotate, thereby driving the turntable (7) to rotate, and further driving the arc-shaped groove (805) on the surface of the turntable (7) to rotate. Finally, the arc-shaped groove (805) of the locked ductile iron pipe fitting is driven to rotate. And under the combined action of the pointer (11) and the inductor (12), the transportation of the ductile iron pipe fitting will be accurately positioned, so as to realize loading, testing, and unloading; Step (D), testing: When the ductile iron pipe fitting is transported to the bracket (2), start the electric push rod (301). The two electric push rods (301) insert the folding sealing film (305) and the water inlet test head (304) into the ductile iron pipe fitting, and insert the extrusion sealing groove (306) into the surface of the ductile iron pipe fitting. Start the high-pressure water pump (4) to conduct a water pressure test by pumping water from the water storage tank (1); Step (E), water recovery: After the test is completed, retract the electric push rod (301) to withdraw the folding sealing film (305) and the water inlet test head (304) from the inside of the ductile iron pipe fitting, and also let the extrusion sealing groove (306) disengage from the surface of the ductile iron pipe fitting, and the water is recovered under the action of gravity.

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