A plastic elbow impact resistance testing device and method

Abstract

The present invention relates to the field of impact resistance testing technology, specifically to a device and method for impact resistance testing of a plastic elbow, comprising a test stand and an elbow, wherein an impact hammer is arranged on the upper side of the test stand, and a slot for inserting the elbow is provided on the side surface of the test stand. The device and method for impact resistance testing of a plastic elbow is limited by a spring steel ball by moving the pressure ring upward, at which time the top of the ring groove is connected to the outside along the air inlet, and the inside of the ring groove is filled with air. When the impact hammer impacts the inclined platform downward, the pressure ring moves downward along the ring groove, and while closing the air inlet, the air in the ring groove is pressed into the elbow along the air injection hole. Compared with the existing single test using the impact force caused by direct contact, the inclined platform cooperates with the pressure ring to quickly press air into the closed elbow, thereby utilizing instantaneous high-pressure air to simulate the sudden increase of water flow and air flow inside the elbow to perform an impact test from the inside to the outside, and the simulation test function is more in line with reality, and the test effect is more comprehensive.

Description

Technical Field

[0001] The invention relates to the technical field of impact resistance testing, and in particular to a device and method for testing the impact resistance of a plastic elbow. Background Art

[0002] Elbows are a common type of pipe fittings used in pipelines. They are generally used to connect two pipes of the same or different nominal diameters, or to change the direction of a pipe. Elbows are made of cast iron, stainless steel, alloy steel, malleable cast iron, carbon steel, nonferrous metals, and plastics. Taking plastic elbows as an example, after production, they generally need to be tested for related properties, such as impact resistance.

[0003] The existing patent (publication number: CN117388094A) discloses a heat exchanger pipeline impact performance detection device and detection method, which relates to the technical field of pipeline performance detection, and includes a frame, a workbench arranged on the frame, a lifting hammer arranged on the frame, and a lifting member for lifting and lowering the hammer, wherein the hammer is arranged in the middle of the frame, and also includes a clamping assembly arranged on the workbench to clamp the outer peripheral wall of the pipeline and a heating assembly arranged on the workbench to heat the pipeline. The fixing effect of the clamping block of the above-mentioned prior art conflicts with the rotation effect of the clamping wheel, and it is difficult to achieve the rotation adjustment effect, and the test function is single, and only direct contact impact is provided.

[0004] In view of this, we propose a device and method for testing the impact resistance of plastic elbows. Summary of the invention

[0005] The purpose of the present invention is to provide a device and method for testing the impact resistance of a plastic elbow, so as to solve the problem that the fixing effect of the clamping block and the rotation effect of the clamping wheel in the prior art mentioned in the above background technology conflict with each other, making it difficult to achieve the rotation adjustment effect, and the test function is single and only provides direct contact impact. In order to achieve the above purpose, the present invention provides the following technical solutions: a device for testing the impact resistance of a plastic elbow, comprising a test frame and an elbow, an impact hammer is provided on the upper side of the test frame, and a slot for inserting the elbow is provided on the side surface of the test frame, and a quick connector is provided on the elbow and the slot.

[0006] The quick connector comprises a chuck matched with the pipe opening of the elbow, and three calipers for fixing along the elbow are slidably connected to the chuck, and bolts for controlling the movement of the calipers are rotatably arranged on the side surface of the chuck.

[0007] The side surface of the test frame is provided with a disc slot that matches the chuck, and the disc slot is connected to the chuck slot. The inner wall of the disc slot is provided with an embedding groove, and a floating block is slidably connected in the embedding groove. A top spring is arranged in the embedding groove, and the top spring pushes the floating block into the disc slot.

[0008] A beveled opening matching with the chuck is cut on one side of the floating block relative to the entrance of the disc groove, and a ring tooth is provided on the outer ring of the chuck, and a locking tooth matching with the ring tooth is arranged on the inner side of the disc groove.

[0009] The test frame and the lock teeth are provided with adjustment components.

[0010] Preferably, the adjustment assembly includes a slide groove opened along the side surface of the test frame away from the disc groove, and the slide groove is connected to the disc groove, a slide seat is slidably connected in the slide groove, and the locking teeth are opened on the side surface of the slide seat.

[0011] A multi-directional impact component is arranged on the chuck.

[0012] Preferably, the multi-directional impact assembly includes a round seat fixedly arranged at the center of the chuck, and a ramp is arranged at the top of the round seat, a connecting pin is fixedly connected to the bottom of the ramp, and the connecting pin is movably inserted into the round seat, and a spring is arranged at the bottom end of the connecting pin.

[0013] The opposite side of the inclined platform and the round seat surface are both provided with mutually matching latching teeth.

[0014] The round seat and the inclined platform are provided with air pressure impact components.

[0015] Preferably, the air pressure impact assembly includes an annular groove opened along the top surface of the round seat, a pressure ring matching the annular groove is fixedly provided at the bottom of the inclined platform, and a spring steel ball for limiting the downward movement of the pressure ring is embedded on the inner side wall of the annular groove.

[0016] An air inlet hole connected to the annular groove is formed on the outer surface of the round seat, and an air injection hole connected to the inside of the elbow is formed at the bottom of the annular groove.

[0017] Preferably, a buckle groove is provided on the outer surface of the slide seat.

[0018] Preferably, a pin is screwed onto the bottom end of the connecting pin, and the spring leaf is rotatably connected to the pin.

[0019] Preferably, a pressure relief hole communicating with the annular groove is provided on the outer surface of the round seat.

[0020] An operating method of a plastic elbow impact resistance testing device comprises the following steps:

[0021] S1. Connect the two chucks to the two ends of the plastic elbow respectively, and rotate the bolts to control the calipers to fix along the elbow;

[0022] S2. Align the chuck connected to the elbow with the disc slot, squeeze the floating block along the oblique opening and push it into the disc slot. At this point, the installation of the elbow along the test frame is completed, and the upper impact hammer can perform impact testing along the elbow;

[0023] S3. After the impact detection of the current position of the elbow is completed, the slide seat is pushed to move along the slide groove so that the locking teeth are separated from the ring teeth. At this time, the chuck can rotate along the disc groove and adjust the position of the elbow and the impact hammer accordingly. After adjustment, the slide seat is pushed back to lock it;

[0024] S4. In addition to the impact hammer directly acting on the elbow surface for testing, the operator can align the inclined platform with the impact hammer. After the impact hammer contacts the inclined platform, it applies radial impact force to the elbow along the inclined surface. After pulling up the inclined platform, the latching teeth are unlocked. At this time, the inclined platform can be rotated to adjust the direction of the force. After the adjustment is completed, the inclined platform is released, and the spring plate drives it to reset and then the latching teeth are used to lock the inclined platform;

[0025] S5. Pull up the inclined platform to move the pressure ring upward synchronously until the pressure ring is limited by the spring steel ball. At this time, the top of the ring groove is connected with the outside along the air inlet hole, and the inside of the ring groove is filled with air. When the impact hammer hits the inclined platform downward, the pressure ring moves down along the ring groove, closing the air inlet hole while pressing the air in the ring groove into the elbow along the air injection hole.

[0026] Compared with the prior art, the present invention has the following beneficial effects:

[0027] In the present invention, the installation of the elbow along the test frame is completed by aligning the chuck connected to the elbow with the disc groove, and squeezing the floating block along the oblique mouth and then pushing it into the disc groove. Compared with the existing installation of the pipe along the test equipment, the above-mentioned chuck can be pre-fixed without operating the pipe, and then the chuck can be used for a second rapid installation. On the one hand, it reduces the mutual interference between holding the pipe to maintain alignment and operating the fixing device. On the other hand, after the impact is completed, the operator can also quickly remove the elbow for inspection and then install it again conveniently, which is more convenient to use.

[0028] In the present invention, the slide seat is pushed to move along the slide groove so that the locking teeth are disengaged from the ring teeth. At this time, the chuck can rotate along the disc groove and adjust the position of the elbow and the impact hammer accordingly. After adjustment, the slide seat can be pushed back to lock it. Compared with the existing conflicting functions of the clamping block fixing function and the clamping wheel rotation function, the installation mode of the chuck can be divided into connection along the test frame and rotation along the test frame, and the rotation step is independent of the connection step, that is, the rotation adjustment of the elbow can be quickly realized without disassembling the chuck and the elbow, and the locking after adjustment is convenient, which is more in line with practical use.

[0029] In the present invention, the inclined table and the impact hammer are aligned, and after the impact hammer contacts the inclined table, a radial impact force is applied to the elbow along the inclined surface, and the inclined table is pulled up to unlock the latch teeth. At this time, the inclined table can be rotated to adjust the direction of the force. After the adjustment is completed, the inclined table is released, and the spring plate drives the inclined table to reset and then uses the latch teeth to lock the inclined table. Compared with the existing detection of directly impacting the outer surface of the pipe fitting, the above-mentioned chuck can simulate the connection position of the pipeline and the elbow, and use the radial impact force acting on the chuck to simulate the impact effect caused by the pipeline and water flow oscillation along the elbow connection point, thereby providing a more realistic detection for the elbow.

[0030] In the present invention, the pressure ring is limited by the spring steel ball by moving upward. At this time, the top of the ring groove is connected with the outside along the air inlet hole, and the inside of the ring groove is filled with air. When the impact hammer impacts the inclined platform downward, the pressure ring moves downward along the ring groove, and closes the air inlet hole. At the same time, the air in the ring groove is pressed into the elbow along the air injection hole. Compared with the existing test that only uses the impact force caused by direct contact, the above-mentioned inclined platform and the pressure ring cooperate to quickly press air into the closed elbow. Instantaneous high-pressure air is used to simulate the sudden increase of water flow and airflow inside the elbow to perform impact test from the inside to the outside. The simulation test function is more in line with reality and the test effect is more comprehensive. BRIEF DESCRIPTION OF THE DRAWINGS

[0031] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0032] Figure 2 It is a schematic diagram of the separation structure of the test stand, the chuck and the elbow of the present invention;

[0033] Figure 3 A partial cross-sectional view of the test stand of the present invention;

[0034] Figure 4 It is a three-dimensional structural schematic diagram of the chuck of the present invention;

[0035] Figure 5 It is a three-dimensional structural cross-sectional view of the chuck of the present invention;

[0036] Figure 6 It is an exploded view of the round seat, the ramp and the connecting pin of the present invention;

[0037] Figure 7 The three-dimensional structure of the round seat and the inclined platform of the present invention is cut away Figure 1 ;

[0038] Figure 8 For the present invention Figure 7 The enlarged view of point A in the middle;

[0039] Fig. 9 The three-dimensional structure of the round seat and the inclined platform of the present invention is cut away Figure 2 .

[0040] In the figure: 1. test stand; 2. elbow; 3. impact hammer; 4. slot; 5. quick connector; 51. chuck; 52. caliper; 53. bolt; 54. disc slot; 55. embedded slot; 56. floating block; 57. top spring; 58. bevel; 59. ring tooth; 510. lock tooth; 511. adjustment assembly; 5111. slide groove; 5112. slide seat; 5113. multi-directional impact assembly; 51131. round seat; 51132. ramp; 51133. connecting pin; 51134. spring; 51135. slot; 51136. air pressure impact assembly; 511361. ring groove; 511362. pressure ring; 511363. spring steel ball; 511364. air inlet; 511365. air injection hole. DETAILED DESCRIPTION

[0041] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technical staff in this field without creative work are within the scope of protection of the present invention.

[0042] See also Figures 1 to 9 The present invention provides a technical solution: a plastic elbow impact test device, comprising a test frame 1 and an elbow 2, an impact hammer 3 is arranged on the upper side of the test frame 1, and a slot 4 for inserting the elbow 2 is opened on the side surface of the test frame 1, and a quick connector 5 is arranged on the elbow 2 and the slot 4. After the elbow 2 is installed along the test frame 1 using the quick connector 5, the upper impact hammer 3 can perform an impact test along the elbow 2.

[0043] The quick connector 5 includes a chuck 51 that matches the pipe mouth of the elbow 2, and three calipers 52 are slidably connected to the chuck 51 for fixing along the elbow 2. Bolts 53 for controlling the movement of the calipers 52 are rotatably provided on the side surface of the chuck 51. The two chucks 51 are respectively connected to the two ends of the plastic elbow, and the bolts 53 are rotated to control the calipers 52 to be fixed along the elbow 2.

[0044] The side surface of the test frame 1 is provided with a disc groove 54 that matches the chuck 51, and the disc groove 54 is connected to the chuck groove 4. The inner wall of the disc groove 54 is provided with an embedding groove 55, and a floating block 56 is slidably connected in the embedding groove 55. A top spring 57 is arranged in the embedding groove 55, and the top spring 57 pushes the floating block 56 into the disc groove 54.

[0045] A bevel 58 matching with the chuck 51 is cut on one side of the floating block 56 relative to the entrance of the disc groove 54, and a ring tooth 59 is provided on the outer ring of the chuck 51. A locking tooth 510 matching with the ring tooth 59 is provided on the inner side of the disc groove 54. The chuck 51 connected to the elbow 2 is aligned with the disc groove 54, and the floating block 56 is squeezed along the bevel 58 and then pushed into the disc groove 54. At this time, the installation of the elbow 2 along the test frame 1 is completed.

[0046] An adjustment assembly 511 is disposed on the test frame 1 and the locking tooth 510 .

[0047] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the adjustment component 511 includes a slide groove 5111 opened along the side surface of the test frame 1 away from the disc groove 54, and the slide groove 5111 is connected to the disc groove 54. A slide seat 5112 is slidably connected in the slide groove 5111. The locking tooth 510 is opened on the side surface of the slide seat 5112. The slide seat 5112 is pushed to move along the slide groove 5111, so that the locking tooth 510 is disengaged from the ring tooth 59. At this time, the chuck 51 can rotate along the disc groove 54 and adjust the position of the elbow 2 and the impact hammer 3 accordingly. After adjustment, the slide seat 5112 can be pushed back to lock it.

[0048] A multi-directional impact assembly 5113 is provided on the chuck 51 .

[0049] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the multi-directional impact assembly 5113 includes a round seat 51131 fixedly arranged at the center of the chuck 51, and a ramp 51132 is arranged at the top of the round seat 51131, a connecting pin 51133 is fixedly connected to the bottom of the ramp 51132, and the connecting pin 51133 is movably inserted in the round seat 51131, and a spring leaf 51134 is arranged at the bottom of the connecting pin 51133.

[0050] Mutually matching latching teeth 51135 are provided on opposite sides of the inclined platform 51132 and the surface of the round seat 51131. The inclined platform 51132 is aligned with the impact hammer 3. After the impact hammer 3 contacts the inclined platform 51132, a radial impact force is applied to the elbow 2 along the inclined surface. The inclined platform 51132 is pulled up and the latching teeth 51135 are unlocked. At this time, the inclined platform 51132 can be rotated to adjust the direction of the force. After the adjustment is completed, the inclined platform 51132 is released, and the spring leaf 51134 drives the reset and then the inclined platform 51132 is locked by the latching teeth 51135.

[0051] An air pressure impact assembly 51136 is provided on the round seat 51131 and the inclined platform 51132 .

[0052] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, the pneumatic impact assembly 51136 includes an annular groove 511361 opened along the top surface of the round seat 51131, a pressure ring 511362 matching the annular groove 511361 is fixedly arranged at the bottom of the inclined platform 51132, and a spring steel ball 511363 for limiting the downward movement of the pressure ring 511362 is embedded on the inner side wall of the annular groove 511361. After the inclined platform 51132 is pulled up, the spring steel ball 511363 can be limited along the pressure ring 511362. During non-pneumatic impact testing, the operator can press down the inclined platform 51132 to assist the pressure ring 511362 in squeezing out the spring steel ball 511363.

[0053] An air inlet hole 511364 communicating with the annular groove 511361 is provided on the outer surface of the round seat 51131, and an air injection hole 511365 communicating with the inside of the elbow 2 is provided at the bottom of the annular groove 511361. The pressure ring 511362 moves up until it is limited by the spring steel ball 511363. At this time, the top of the annular groove 511361 is communicated with the outside along the air inlet hole 511364, and the inside of the annular groove 511361 is filled with air. When the impact hammer 3 strikes the inclined platform 51132 downward, the pressure ring 511362 moves down along the annular groove 511361, closing the air inlet hole 511364 and pressing the air in the annular groove 511361 into the elbow 2 along the air injection hole 511365.

[0054] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, a buckle groove is provided on the outer surface of the slide seat 5112, and the user can conveniently push the slide seat 5112 to move along the buckle groove, which is easy to operate.

[0055] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9 As shown, a pin is screwed onto the bottom end of the connecting pin 51133, and the spring leaf 51134 is rotatably connected to the pin. When the elastic force and the limit amount of the spring leaf 51134 are damaged, the spring leaf 51134 can be quickly replaced by screwing out the pin.

[0056] In this embodiment, Figure 1 , Figure 2 , Figure 3 , Figure 4 , Figures 5 to 9As shown, a pressure relief hole connected to the annular groove 511361 is provided on the outer surface of the round seat 51131. After the user pulls up the inclined platform 51132 to adjust the angle, the air in the annular groove 511361 can be discharged along the pressure relief hole during the process of pressing down the inclined platform 51132, so as to avoid the air pressure shock detection affecting the external shock detection, and the aperture of the pressure relief hole is smaller than the air injection hole 511365. Therefore, during the air pressure detection process, the pressure ring 511362 will press most of the air into the elbow 2 instead of leaking.

[0057] An operating method of a plastic elbow impact resistance testing device comprises the following steps:

[0058] S1. Connect the two chucks 51 to the two ends of the plastic elbow respectively, and rotate the bolts 53 to control the caliper 52 to fix along the elbow 2.

[0059] S2, align the chuck 51 connected to the elbow 2 with the disc groove 54, and squeeze the floating block 56 along the oblique opening 58 and push it into the disc groove 54. At this time, the installation of the elbow 2 along the test frame 1 is completed, and the upper impact hammer 3 can perform impact test along the elbow 2.

[0060] S3. After the impact detection of the current position of the elbow 2 is completed, the slide 5112 is pushed to move along the slide groove 5111 so that the locking tooth 510 is disengaged from the ring tooth 59. At this time, the chuck 51 can rotate along the disc groove 54 and adjust the position of the elbow 2 and the impact hammer 3 accordingly. After adjustment, the slide 5112 can be pushed back to lock it.

[0061] S4. In addition to the impact hammer 3 directly acting on the surface of the elbow 2 for detection, the operator can align the inclined platform 51132 with the impact hammer 3. After the impact hammer 3 contacts the inclined platform 51132, it applies a radial impact force to the elbow 2 along the inclined surface. After pulling up the inclined platform 51132, the latch tooth 51135 is unlocked. At this time, the inclined platform 51132 can be rotated to adjust the direction of the force. After the adjustment is completed, the inclined platform 51132 is released, and the spring leaf 51134 drives the reset and then uses the latch tooth 51135 to lock the inclined platform 51132.

[0062] S5. Pull up the inclined platform 51132 to make the pressure ring 511362 move up synchronously until the pressure ring 511362 is limited by the spring steel ball 511363. At this time, the top of the annular groove 511361 is connected with the outside along the air inlet hole 511364, and the inside of the annular groove 511361 is filled with air. When the impact hammer 3 impacts the inclined platform 51132 downward, the pressure ring 511362 moves down along the annular groove 511361, closing the air inlet hole 511364, and at the same time, presses the air in the annular groove 511361 into the elbow 2 along the air injection hole 511365.

[0063] The above shows and describes the basic principles, main features and advantages of the present invention. Technical personnel in this industry should understand that the present invention is not limited to the above embodiments. The above embodiments and descriptions are only preferred examples of the present invention and are not used to limit the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A plastic elbow impact resistance testing device, comprising a test frame (1) and an elbow (2), characterized in that: An impact hammer (3) is arranged on the upper side of the test frame (1), and a slot (4) for inserting the elbow (2) is provided on the side surface of the test frame (1), and a quick connector (5) is arranged on the elbow (2) and the slot (4); The quick connector (5) comprises a chuck (51) matched with the pipe opening of the elbow (2), and three calipers (52) for fixing along the elbow (2) are slidably connected to the chuck (51), and bolts (53) for controlling the movement of the calipers (52) are rotatably arranged on the side surface of the chuck (51); The side surface of the test stand (1) is provided with a disc groove (54) matched with the chuck (51), and the disc groove (54) is communicated with the chuck groove (4); an embedding groove (55) is provided on the inner wall of the disc groove (54), and a floating block (56) is slidably connected in the embedding groove (55); a top spring (57) is provided in the embedding groove (55), and the top spring (57) pushes the floating block (56) into the disc groove (54); A bevel (58) matching with the chuck (51) is cut on one side of the floating block (56) opposite to the entrance of the disc groove (54), and a ring tooth (59) is provided on the outer ring of the chuck (51), and a locking tooth (510) matching with the ring tooth (59) is provided on the inner side of the disc groove (54); The test frame (1) and the lock tooth (510) are provided with an adjustment component (511); The adjustment assembly (511) comprises a slide groove (5111) formed along a side surface of the test frame (1) facing away from the disc groove (54), and the slide groove (5111) is connected to the disc groove (54), a slide seat (5112) is slidably connected in the slide groove (5111), and the locking tooth (510) is formed on a side surface of the slide seat (5112); The chuck (51) is provided with a multi-directional impact component (5113); The multi-directional impact assembly (5113) comprises a round seat (51131) fixedly arranged at the center of the chuck (51), and a ramp (51132) is arranged at the top of the round seat (51131), a connecting pin (51133) is fixedly connected to the bottom of the ramp (51132), and the connecting pin (51133) is movably inserted into the round seat (51131), and a spring leaf (51134) is arranged at the bottom of the connecting pin (51133); The inclined platform (51132) and the round seat (51131) are provided with mutually matching latching teeth (51135) on opposite sides of the surface. A gas pressure impact assembly (51136) is provided on the round seat (51131) and the inclined platform (51132); The air pressure impact assembly (51136) comprises an annular groove (511361) formed along the top surface of the round seat (51131); a pressure ring (511362) matching the annular groove (511361) is fixedly arranged at the bottom of the inclined platform (51132); and a spring steel ball (511363) for limiting the downward movement of the pressure ring (511362) is embedded on the inner side wall of the annular groove (511361); An air inlet hole (511364) communicating with the annular groove (511361) is provided on the outer surface of the round seat (51131), and an air injection hole (511365) communicating with the inside of the elbow (2) is provided at the bottom of the annular groove (511361).

2. A plastic elbow impact resistance testing device according to claim 1, characterized in that: The outer surface of the sliding seat (5112) is provided with a buckle groove.

3. A plastic elbow impact resistance testing device according to claim 2, characterized in that: A pin is screwed onto the bottom end of the connecting pin (51133), and the spring leaf (51134) is rotatably connected to the pin.

4. A plastic elbow impact resistance testing device according to claim 3, characterized in that: The outer surface of the round seat (51131) is provided with a pressure relief hole which is in communication with the annular groove (511361).

5. The method for operating the plastic elbow impact resistance testing device according to claim 4 comprises the following steps: S1, docking the two chucks (51) with the two ends of the plastic elbow respectively, and rotating the bolts (53) to control the calipers (52) to be fixed along the elbow (2); S2, align the chuck (51) connected to the elbow (2) with the disc groove (54), and squeeze the floating block (56) along the oblique opening (58) and then push it into the disc groove (54). At this time, the installation of the elbow (2) along the test frame (1) is completed, and the upper impact hammer (3) can perform an impact test along the elbow (2); S3, after the impact detection of the current position of the elbow (2) is completed, the slide seat (5112) is pushed along the slide groove (5111) to move so that the locking teeth (510) are disengaged from the ring teeth (59). At this time, the chuck (51) can be rotated along the disc groove (54), and the position of the elbow (2) and the impact hammer (3) is adjusted accordingly. After adjustment, the slide seat (5112) is pushed back to lock it; S4. In addition to the impact hammer (3) directly acting on the surface of the elbow (2) for detection, the operator can align the inclined platform (51132) with the impact hammer (3). After the impact hammer (3) contacts the inclined platform (51132), it applies a radial impact force to the elbow (2) along the inclined surface. After the inclined platform (51132) is pulled up, the latch (51135) is unlocked. At this time, the inclined platform (51132) can be rotated to adjust the direction of the force. After the adjustment is completed, the inclined platform (51132) is released, and the spring (51134) drives the reset and then the inclined platform (51132) is locked by the latch (51135). S5. Pull up the inclined platform (51132) to move the pressure ring (511362) upward synchronously until the pressure ring (511362) is limited by the spring steel ball (511363). At this time, the top of the annular groove (511361) is connected to the outside along the air inlet hole (511364), and the inside of the annular groove (511361) is filled with air. When the impact hammer (3) impacts the inclined platform (51132) downward, the pressure ring (511362) moves downward along the annular groove (511361), closing the air inlet hole (511364) and pressing the air in the annular groove (511361) into the elbow (2) along the air injection hole (511365).

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