A testing device for the fall of pipe fittings

Abstract

The present invention relates to a test device for the fall of pipe fittings, which includes a rotating device, a lifting device, a constant temperature water bath device and a frame device. The rotating device uses a rotating motor with an output shaft, the output shaft is connected to a rotating shaft, and a rotating shaft sleeve that follows it is sleeved outside the rotating shaft. The lifting device uses a lead screw motor with a lead screw guide rail, and upper and lower limit blocks for limiting the frame device are respectively provided at the upper and lower ends of the lead screw guide rail. A rotating shaft base is fixedly provided at the inner side of the constant temperature water bath device. The rotating shaft base limits the bottom of the rotating shaft and is rotatably connected to the rotating shaft. The frame device is screwed to the lead screw guide rail and generates vertical displacement along with the rotation of the lead screw guide rail on the lead screw guide rail. Through the cooperation of the rotating motor and the lead screw motor, the pipe fittings can rise and fall simultaneously. In cooperation with the constant temperature water bath device, the pretreatment and the fall can be completed integrally, and the rotation speed of the motor is controlled to achieve the fall within a specified time.

Description

Technical Field

[0001] The present invention relates to the technical field of pipe fitting detection, and in particular to a test device for the fall of rigid polyvinyl chloride pipe fittings for various purposes. Background Art

[0002] In the pipe fitting fall test, the test piece needs to be pre-treated at 0±1°C for a specified time, and freely fall from a specified height to a flat concrete floor within 10 s. Moreover, there are clear requirements for the pre-treatment temperature, fall time, fall height, and fall ground of the test piece in the fall test.

[0003] Currently, the pre-treatment and fall in the fall test are carried out separately. The test piece is pre-treated in a low-temperature box, and the pre-treatment time varies according to the pipe diameter. Usually, the pre-treatment is carried out manually, which cannot save time costs. Secondly, the specification requires that free fall be completed within 10 s after the pre-treatment is completed. It is difficult for manual operation to control the time well, which will directly affect the test results. Summary of the Invention

[0004] The technical problem to be solved by the present invention is: to provide a test device for the fall of pipe fittings in order to overcome the deficiencies in the prior art.

[0005] The technical solution adopted by the present invention is: a test device for the fall of pipe fittings, including a rotating device, a lifting device, a constant temperature water bath device, and a frame device.

[0006] The rotating device uses a rotating motor with an output shaft. The output shaft is connected to a rotating shaft, and a rotating shaft sleeve that follows it is sleeved outside the rotating shaft.

[0007] The lifting device uses a lead screw motor with a lead screw guide rail. Upper and lower limit blocks for limiting the frame device are respectively provided at the upper and lower ends of the lead screw guide rail. The lead screw motor, the upper limit block, and the lower limit block are all fixedly arranged outside the rotating shaft sleeve and are connected in a line vertically.

[0008] A rotating shaft base is fixedly provided at the inner side of the constant temperature water bath device. The rotating shaft base limits the bottom of the rotating shaft and is rotatably connected to the rotating shaft.

[0009] The frame device is screwed to the lead screw guide rail and generates vertical displacement along with the rotation of the lead screw guide rail. The frame device includes a housing, a baffle for placing the pipe fitting, and a stop rod limited below the baffle.

[0010] Further, the upper limit block is provided with an insertion block that narrows downward.

[0011] The housing of the frame device includes an upper end face, a lower end face and a side face. The frame device adopts a cylindrical structure with an inner cavity. Guide holes for the lead screw guide rail to pass through, perforations for the retaining piece to pass through, and limit block holes for the insertion block to pass through are provided on the upper end face and the lower end face.

[0012] Furthermore, 3 - 6 retaining pieces are provided and are annularly distributed and pieced together into a circle. There are two retaining rods connected by an elastic connecting piece, and the elastic connecting piece is vertically connected to one end of the two retaining rods close to the guide hole.

[0013] Furthermore, the retaining piece is rotatably connected to the housing at the perforation on the upper end face through a pin shaft.

[0014] Furthermore, the end of the retaining rod with the elastic connecting piece is fixed to the housing of the frame device.

[0015] Furthermore, the limit block hole is arranged on the side of the elastic connecting piece away from the guide hole.

[0016] Specifically, the size range of the pipe fittings for general testing is (nominal outer diameter 20mm, height 16mm) - (nominal outer diameter 400mm, height 204mm). In order to ensure that pipe fittings of all sizes can be tested through the same device, requirements for the sizes of some components of the device are needed.

[0017] Furthermore, the surface of the retaining piece has a downward arc towards the center of the perforation. The retaining piece has a hollow part, and the diameter of the inscribed circle of the hollow part is 10 - 16mm, and the diameter of the perforation is 500 - 600mm.

[0018] Preferably, the retaining rod has a shape with an arc section, which is adapted to the arc of the retaining piece when limiting the retaining piece.

[0019] Furthermore, the lower section of the lead screw guide rail is located in the constant temperature water bath device, and the height located in the constant temperature water bath device is greater than 500mm;

[0020] The rotating motor is fixed on the bracket.

[0021] Furthermore, the diameter range of the rotating shaft sleeve is 60 - 100mm.

[0022] The testing includes the following steps:

[0023] S1. Place the pipe fitting on the retaining piece. Since the surface of the retaining piece has a downward arc towards the center of the perforation, the pipe fitting automatically tends to the center of the retaining piece;

[0024] S2. Then start the lead screw motor to immerse the pipe fitting in the constant temperature water in the constant temperature water bath device for pre - treatment, and then turn off the lead screw motor. Start the test after a certain period of time, and a time relay is equipped to determine the pre - treatment time;

[0025]

[0025] After the pre-treatment is completed, start the rotating motor and the lead screw motor, and control the rotation speeds of the two motors to ensure that the rotation angle of the rotating motor is (180° + n×360°, n is a natural number) within 10 s, and the frame device contacts the upper limit block. At this time, the insertion block abuts against the two stop rods and offsets the stop rods outside the through hole, and the elastic connecting piece undergoes elastic deformation. Then, the retaining piece rotates downward due to gravity because it loses the limit of the stop rod, and the pipe fitting on the retaining piece falls downward from the through hole to the ground;

[0026]

[0026] After one drop is completed, start the rotating motor and the lead screw motor to rotate in the reverse direction. The insertion block disengages from the two stop rods, and the elastic connecting piece returns to its original state and drives the two stop rods to rotate to below the through hole to re-limit the retaining piece. The entire device returns to its original position, and the rotating motor and the lead screw motor are turned off, waiting for the next test.

[0027]

[0027] The present invention has the following advantages compared with the prior art: Through the cooperation of the rotating motor and the lead screw motor, the pipe fitting can be lifted and lowered simultaneously. With the constant temperature water bath device, the pre-treatment and the drop can be completed integrally, and the rotation speeds of the motors are controlled to complete the drop within the specified time. Description of the Drawings

[0028] Figure 1 Figure 1 is a schematic structural diagram of the present invention;

[0029] Figure 2 Figure 2 is a schematic structural diagram of the present invention from another angle;

[0030] Figure 3 Figure 3 is a schematic structural diagram of the present invention after completing the work;

[0031] Figure 4 Figure 4 is a schematic structural diagram of the frame device of the present invention;

[0032] Figure 5 Figure 5 is the present invention Figure 4 Figure 4 from another angle;

[0033] Figure 6 Figure 6 is the present invention Figure 3 Figure 3 schematic structural diagram of the frame device in;

[0034]

[0034] The reference numerals in the figure: 1 - rotating motor, 11 - rotating shaft sleeve, 12 - rotating shaft, 13 - rotating shaft base; 2 - lead screw motor, 21 - lead screw guide rail, 22 - upper limit block, 23 - lower limit block, 24 - insertion block; 3 - bracket; 4 - constant temperature water bath device; 5 - frame device, 51 - retaining piece, 52 - stop rod, 53 - elastic connecting piece, 54 - guide rail hole, 55 - through hole, 56 - limit block hole. Detailed Embodiments

[0035] The embodiments of the present invention will be described in detail below. The embodiments are implemented on the premise of the technical solution of the present invention, and the detailed implementation manners and specific operation processes are given. However, the protection scope of the present invention is not limited to the following embodiments.

[0036] A test device for the fall of pipe fittings includes a rotating device, a lifting device, a constant temperature water bath device 4 and a frame device 5.

[0037] The rotating device uses a rotating motor 1 with an output shaft. The output shaft is connected to a rotating shaft 12, and a rotating shaft sleeve 11 that follows it is sleeved outside the rotating shaft 12.

[0038] The lifting device uses a lead screw motor 2 with a lead screw guide 21. Upper and lower limit blocks 22 and 23 for limiting the frame device 5 are respectively provided at the upper and lower ends of the lead screw guide 21. The lead screw motor 2, the upper limit block 22 and the lower limit block 23 are all fixedly arranged outside the rotating shaft sleeve 11 and are in a straight line vertically.

[0039] A rotating shaft base 13 is fixedly provided at the inner side of the constant temperature water bath device 4. The rotating shaft base 13 limits the bottom of the rotating shaft 12 and is rotationally connected to the rotating shaft 12.

[0040] The frame device 5 is screwed onto the lead screw guide 21 and generates an up and down displacement along with the rotation of the lead screw guide 21. The frame device 5 includes a housing, a baffle 51 for placing pipe fittings, and a baffle rod 52 limited below the baffle 51.

[0041] The upper limit block 22 has an insertion block 24 that narrows downward.

[0042] The housing of the frame device 5 includes an upper end face, a lower end face and a side face. The frame device 5 adopts a cylindrical structure with an inner cavity. Guide holes 54 for the lead screw guide 21 to pass through, perforations 55 for the baffle 51 to pass through, and limit block holes 56 for the insertion block 24 to pass through are provided on the upper end face and the lower end face.

[0043] There are 3 - 6 baffle plates 51 distributed in a ring and assembled into a circle. There are two baffle rods 52 connected by an elastic connecting piece 53. The elastic connecting piece 53 is vertically connected to one end of the two baffle rods 52 close to the guide hole 54.

[0044] The baffle 51 is rotatably connected to the housing at the perforation 55 on the upper end face through a pin shaft.

[0045] One end of the baffle rod 52 provided with the elastic connecting piece 53 is fixed to the housing of the frame device 5.

[0046] The limit block hole 56 is arranged on the side of the elastic connecting piece 53 away from the guide hole 54.

[0047] The surface of the baffle 51 has a downward curvature towards the center of the perforation 55. The baffle 51 has a hollowed-out part, and the diameter of the inscribed circle of the hollowed-out part is 10 - 16 mm, and the diameter of the perforation 55 is 500 - 600 mm.

[0048] The lower section of the screw rod guide 21 is located inside the constant temperature water bath device 4, and the height inside the constant temperature water bath device 4 is greater than 500 mm; the rotating motor 1 is fixed on the bracket 3.

[0049] The diameter range of the rotating shaft sleeve 11 is 60 - 100 mm.

[0050] The testing includes the following steps:

[0051] S1. Place the pipe fitting on the baffle 51. Since the surface of the baffle 51 has a downward curvature towards the center of the perforation 55, the pipe fitting automatically tends to the center of the baffle 51.

[0052] S2. Then start the screw rod motor 2 to immerse the pipe fitting in the constant temperature water in the constant temperature water bath device 4 for pre-treatment, and then turn off the screw rod motor 2. Start the test after a certain period of time, and a time relay is equipped to determine the pre-treatment time.

[0053] S3. After the pre-treatment is completed, start the rotating motor 1 and the screw rod motor 2, control the rotation speeds of the two motors, ensure that the rotation angle of the rotating motor 1 is (180° + n×360°, n is a natural number) within 10 s, the frame device 5 contacts the upper limit block 22. At this time, the insertion block 24 presses against the two stop rods 52 and offsets the stop rods 52 outwards from the perforation 55, and the elastic connecting piece undergoes elastic deformation. Then the baffle 51 rotates downward due to gravity because it loses the limit of the stop rods 52, and the pipe fitting on the baffle 51 falls downward from the perforation 55 to the ground.

[0054] S4. After one drop is completed, start the rotating motor 1 and the screw rod motor 2 to rotate in the reverse direction. The insertion block 24 disengages from the two stop rods 52, and the elastic connecting piece returns to its original state and drives the two stop rods 52 to rotate to below the perforation 55 to re-limit the baffle 51. The whole device returns to its original position, turn off the rotating motor 1 and the screw rod motor 2, and wait for the next test.

Claims

1. A test device for the fall of pipe fittings, characterized in that: It includes a rotating device, a lifting device, a constant temperature water bath device (4) and a frame device (5). The rotating device uses a rotating motor (1) with an output shaft. The output shaft is connected to a rotating shaft (12), and a rotating shaft sleeve (11) that follows it is sleeved outside the rotating shaft (12). The lifting device uses a lead screw motor (2) with a lead screw guide (21). Upper and lower limit blocks (22) and (23) for limiting the frame device (5) are respectively provided at the upper and lower ends of the lead screw guide (21). The lead screw motor (2), the upper limit block (22) and the lower limit block (23) are all fixedly arranged outside the rotating shaft sleeve (11) and are in a straight line vertically. A rotating shaft base (13) is fixedly provided at the inner side edge of the constant temperature water bath device (4). The rotating shaft base (13) limits the bottom of the rotating shaft (12) and the rotating shaft base (13) is rotationally connected to the rotating shaft (12). The frame device (5) is screwed to the lead screw guide (21) and generates vertical displacement along with the rotation of the lead screw guide (21) on the lead screw guide (21). The frame device (5) includes a housing, a baffle (51) for placing pipe fittings, and a baffle rod (52) limited below the baffle (51). The upper limit block (22) has an insertion block (24) that narrows downward. The housing of the frame device (5) includes an upper end face, a lower end face and a side face. The frame device (5) adopts a cylindrical structure with an inner cavity. Guide holes (54) for the lead screw guide (21) to pass through, through holes (55) for the baffle (51) to pass through, and limit block holes (56) for the insertion block (24) to pass through are provided on the upper end face and the lower end face. There are 3 - 6 baffle plates (51) distributed in a ring and pieced together into a circle. There are two baffle rods (52) connected by an elastic connecting piece (53). The elastic connecting piece (53) is vertically connected to one end of the two baffle rods (52) close to the guide hole (54). The baffle (51) is rotationally connected to the housing at the through hole (55) of the upper end face through a pin shaft. One end of the baffle rod (52) provided with the elastic connecting piece (53) is fixed to the housing of the frame device (5). The limit block hole (56) is arranged on the side of the elastic connecting piece (53) away from the guide hole (54).

2. The test device for the fall of pipe fittings according to claim 1, characterized in that: The surface of the baffle (51) has a downward arc towards the center of the through hole (55). The baffle (51) has a hollow part, and the diameter of the inscribed circle of the hollow part is 10 - 16 mm, and the diameter of the through hole (55) is 500 - 600 mm.

3. The test device for pipe fitting falling according to claim 1, characterized in that: The lower section of the lead screw guide (21) is located inside the constant temperature water bath device (4), and the height inside the constant temperature water bath device (4) is greater than 500 mm. The rotating motor (1) is fixed on the bracket (3).

4. The test device for pipe fitting falling according to claim 1, characterized in that: The diameter range of the rotating shaft sleeve (11) is 60 - 100 mm.

5. The test device for the fall of pipe fittings according to any one of claims 1-4, characterized in that: The testing includes the following steps: S1. Place the pipe fitting on the baffle (51). Since the surface of the baffle (51) has a downward arc towards the center of the through hole (55), the pipe fitting automatically tends to the center of the baffle (51). S2. Then start the lead screw motor (2) to immerse the pipe fitting in the constant-temperature water in the constant-temperature water bath device (4) for pretreatment, and then turn off the lead screw motor (2). Start the test after a certain period of time, and equip a time relay to determine the pretreatment time. S3. After the pretreatment is completed, start the rotation motor (1) and the lead screw motor (2), and control the rotation speeds of the two motors to ensure that the rotation angle of the rotation motor (1) is (180° + n×360°, n is a natural number) within 10 s and the frame device (5) contacts the upper limit block (22). At this time, the insertion block (24) offsets the two retaining rods (52) outward from the through hole (55) after pressing against the two retaining rods (52), and the elastic connecting piece undergoes elastic deformation. Then, the retaining piece (51) rotates downward due to gravity because the limit of the retaining rod (52) is lost, and the pipe fitting on the retaining piece (51) falls downward from the through hole (55) to the ground. S4. After one drop is completed, start the rotation motor (1) and the lead screw motor (2) to rotate in the reverse direction. The insertion block (24) disengages from the two retaining rods (52), and the elastic connecting piece returns to its original state, driving the two retaining rods (52) to rotate to the lower part of the through hole (55) to re-limit the retaining piece (51). The entire device returns to its original position. Turn off the rotation motor (1) and the lead screw motor (2), and wait for the next test.

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