Adhesive force testing jig for anticorrosive layer of three-PE (polyethylene) anticorrosive steel pipe

Abstract

The utility model belongs to the technical field of anti-corrosion steel pipes, and particularly relates to an adhesive force testing frame for an anti-corrosion layer of a three-PE (Poly Ethylene) anti-corrosion steel pipe. The device comprises a support; the force application mechanism is arranged at the top end of the support, the force application mechanism comprises a pull rope, and the pull rope penetrates through the top end of the support and extends into the lower portion of the support; one end of the dynamometer is connected with the pull rope; and the clamp is connected with the other end of the dynamometer and is used for clamping the anti-corrosion layer. The tensile test device is used for solving the technical problems that in the prior art, the tensile test can be completed only by sampling the anti-corrosion steel pipe and feeding the sample into a test room, and the tensile test cannot be directly performed on the anti-corrosion steel pipe in the production and sales processes.

Description

Technical Field

[0001] The utility model belongs to the technical field of anti-corrosion steel pipes, and in particular relates to a three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test frame. Background Art

[0002] The adhesion test method of the anti-corrosion layer of PE anti-corrosion steel pipe generally adopts the tensile method, that is, the anti-corrosion layer of a set area is clamped by a fixture, and vertical tensile force is continuously applied along the radial direction of the anti-corrosion steel pipe until the anti-corrosion layer is peeled off from the substrate (steel pipe), and the tensile value when the anti-corrosion layer is peeled off is collected, and then the measured tensile value is compared with the standard value to judge whether the adhesion of the anti-corrosion layer meets the standard requirements. However, the test equipment for tensile testing in the prior art is too large, and only samples of anti-corrosion steel pipes can be collected to complete tensile testing in the inspection room; and in the actual production and sales process, there is a need to detect the adhesion of the anti-corrosion layer. Therefore, how to improve the speed and convenience of tensile testing is particularly important and needs to be solved urgently. Utility Model Content

[0003] The technical problem to be solved by the utility model is to overcome the deficiencies of the prior art and provide a three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand to solve the technical problem in the prior art that it is necessary to sample the anti-corrosion steel pipe and send the sample to the inspection room to complete the tensile test, and the tensile test cannot be performed directly on the anti-corrosion steel pipe during the production and sales process.

[0004] The utility model solves the above technical problems with the following technical solutions: a three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand, comprising:

[0005] Bracket;

[0006] A force applying mechanism, the force applying mechanism is arranged at the top end of the bracket, the force applying mechanism comprises a pull rope, the pull rope passes through the top end of the bracket and extends into the bottom of the bracket;

[0007] a dynamometer, one end of which is connected to the pull rope;

[0008] A clamp is connected to the other end of the dynamometer and is used to clamp the anti-corrosion layer.

[0009] The utility model can directly set up the bracket on the anti-corrosion steel pipe, then use the clamp to directly clamp the anti-corrosion layer, and then use the force-applying mechanism to stretch the dynamometer. At this time, the dynamometer will display the current tension. By observing whether the current value of the dynamometer is greater than the standard value during the force-applying stretching process of the anti-corrosion layer, it can be concluded whether the adhesion of the anti-corrosion layer meets the standard requirements.

[0010] Further: the bracket includes a left leg and a right leg, the top of the left leg and the top of the right leg are each provided with a pair of hinged ears, the left leg and the right leg are hinged through the hinged ears, and a platform is further connected between adjacent hinged ears, and the platform is used to fix the force-applying mechanism;

[0011] The platform is also provided with a through hole at a position corresponding to the pull rope.

[0012] The beneficial effect of adopting this step is that the openable bracket can adjust the distance between the left leg and the right leg to adapt to anti-corrosion steel pipes of different diameters.

[0013] Further: the force applying mechanism comprises:

[0014] a pair of fixing plates, wherein the pair of fixing plates are fixed in parallel to the platform;

[0015] A rope wheel, wherein a rotating shaft is provided at the center of both end surfaces of the rope wheel, the rope wheel is hinged between the fixing plates through the rotating shaft, a groove is provided on the circumferential surface of the rope wheel, and the pull rope is wound in the groove;

[0016] A driver is used for driving the rope wheel to rotate.

[0017] The beneficial effect of adopting this step is: by driving the rope pulley forward and reversely through the driver, the pull rope can be retracted and released; usually before the test, the pull rope is first lengthened to allow the clamp to clamp the anti-corrosion layer, and then the pull rope is gradually tightened. Under the action of the pull rope, the dynamometer, the clamp and the anti-corrosion layer are gradually tightened. The tightened dynamometer can display the adhesion between the anti-corrosion layer and the steel pipe.

[0018] Further: the driver is a crank, one end of which is fixedly connected to the rotating shaft of the rope pulley;

[0019] The crank is a single-handle crank or a double-handle crank.

[0020] The beneficial effect of adopting this step is: the rotation of the rope wheel is controlled by turning the crank.

[0021] Furthermore, the driver is a push rod, the front end of the push rod is forked into a pair of paddles, and the pair of paddles are respectively hinged to the rotating shafts at both ends of the rope wheel;

[0022] The rope wheel is also provided with two circles of ratchets;

[0023] The paddle is also hinged with a pushing pawl adapted to the ratchet;

[0024] The fixing plate is also provided with a limiting pawl matched with the ratchet.

[0025] The beneficial effect of adopting this step is: by pressing or lifting the push rod, the push pawl on the push rod will drive the rope wheel with ratchet teeth to rotate, thereby tightening the pull rope, and under the action of the limit pawl, the rope wheel will not return during the rotation process, and can only ensure one-way rotation, thereby ensuring that the force on the dynamometer is stable.

[0026] Furthermore: protective nets are provided on the sides of the left leg and the right leg.

[0027] The beneficial effect of adopting this step: at the moment when the anti-corrosion layer is peeled off from the substrate under stress, the fixture and the dynamometer are easy to collapse and may hit the operator nearby, but the protective net can prevent this from happening.

[0028] Furthermore: a limiting mechanism is also provided on the side of the left leg and the right leg, and the limiting mechanism includes a limiting pin and a limiting strip, and the limiting pin and the limiting strip are respectively arranged on the left leg and the right leg, and the limiting strip is also provided with a plurality of through holes or slots adapted to the limiting pins.

[0029] The beneficial effect of adopting this step is: the opening and closing angles of the left leg and the right leg are adjusted and fixed by using the limiting mechanism to provide stable support.

[0030] Furthermore: rollers are provided at the bottom of the left leg and the right leg, and the rotation direction of the rollers is consistent with the opening and closing direction of the bracket.

[0031] The beneficial effect of adopting this step is that the roller can move along the radial direction of the anti-corrosion steel pipe to facilitate the adjustment of the position of the bracket on the anti-corrosion steel pipe.

[0032] Further: the support is provided with a horizontal bubble meter or a plumb line

[0033] The beneficial effects of adopting this step are: through the horizontal bubble meter or plumb line, ensure that the point where the fixture clamps the anti-corrosion layer, the dynamometer, and the straight line formed by the pull rope are perpendicular to the anti-corrosion steel pipe, avoiding the deviation of the force direction and affecting the accuracy of the measurement results.

[0034] The beneficial effects of the utility model are:

[0035] 1. The test stand of the present application can directly perform tensile tests on the adhesion of the anti-corrosion layer on the anti-corrosion steel pipe. It is no longer necessary to take samples and send them to the inspection room for inspection as in the prior art. This can save inspection time and simplify the inspection process. Accurate results can be obtained directly and quickly in multiple scenarios such as production or sales sites, making it more convenient to use.

[0036] 2. The bracket of the test frame in this application can adjust the opening angle, which can be applied to anti-corrosion steel pipes of different diameters and can provide a stable support point during the tensile test. BRIEF DESCRIPTION OF THE DRAWINGS

[0037] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0038] Figure 1 A schematic structural diagram of a first embodiment of a three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand provided by the utility model;

[0039] Figure 2 A schematic structural diagram of a second embodiment of a three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand provided by the utility model;

[0040] Figure 3 A schematic diagram of the structure of a three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand provided by the utility model, excluding the dynamometer and the fixture;

[0041] Figure 4 for Figure 3 AA section view.

[0042] Reference numerals:

[0043] 1- bracket; 2- force applying mechanism; 3- dynamometer; 4- fixture;

[0044] 11-hinged ear; 12-protective net; 14-roller; 21-fixed plate; 22-ropes; 23-push rod; 23'-crank handle; 24-limiting pawl;

[0045] 131 - limiting strip; 132 - limiting pin; 221 - groove; 222 - ratchet; 231 - pushing pawl. DETAILED DESCRIPTION

[0046] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0047] It should be noted that, unless otherwise specified, the technical terms or scientific terms used in this application should have the common meanings understood by technicians in the field to which the utility model belongs.

[0048] In the description of the present application, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.

[0049] In addition, the terms "first", "second", etc. are used for descriptive purposes only and cannot be understood as indicating or implying relative importance or implicitly indicating the number of technical features indicated. In the description of the present utility model, the meaning of "plurality" is more than two, unless otherwise clearly and specifically limited.

[0050] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this utility model can be understood according to specific circumstances.

[0051] In the present application, unless otherwise clearly specified and limited, a first feature being “above” or “below” a second feature may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. Moreover, a first feature being “above”, “above”, and “above” a second feature may mean that the first feature is directly above or obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being “below”, “below”, and “below” a second feature may mean that the first feature is directly below or obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

[0052] Example

[0053] like Figure 1 , Figure 2 , Figure 3 and Figure 4 As shown, the utility model provides a three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand, comprising:

[0054] Bracket 1;

[0055] A force applying mechanism 2, wherein the force applying mechanism 2 is disposed at the top of the bracket 1, and the force applying mechanism 2 comprises a pull rope, wherein the pull rope passes through the top of the bracket 1 and extends into the bottom of the bracket 1;

[0056] A dynamometer 3, one end of which is connected to the pull rope;

[0057] The clamp 4 is connected to the other end of the dynamometer 3, and the clamp 3 is used to clamp the anti-corrosion layer. The clamp 4 is preferably a locking pliers, which can provide reliable clamping force and can adjust the clamping thickness of the jaws. It is suitable for anti-corrosion layers of different thicknesses and is easy to use.

[0058] The utility model can directly set up the bracket 1 on the anti-corrosion steel pipe, and then use the clamp 4 to directly clamp the anti-corrosion layer, and then use the force-applying mechanism 2 to stretch the dynamometer 3. At this time, the dynamometer 3 will display the current tension. By observing whether the current value of the dynamometer 3 is greater than the standard value during the force stretching process of the anti-corrosion layer, it can be concluded whether the adhesion of the anti-corrosion layer meets the standard requirements. There are two specific situations. The adhesion of the anti-corrosion layer is less than the standard adhesion. When the tension value displayed by the dynamometer 3 is less than the standard adhesion, the anti-corrosion layer will peel off the substrate. The other situation is that the adhesion of the anti-corrosion layer is greater than the standard adhesion. When the tension value displayed by the dynamometer 3 reaches the standard adhesion, the anti-corrosion layer has not yet peeled off the substrate. At this time, you can choose to terminate the tension test, or you can continue the tension test until the anti-corrosion layer peels off the substrate and measure the actual maximum adhesion of the anti-corrosion layer.

[0059] On the basis of the above technical solution, the bracket 1 includes a left leg and a right leg, and a pair of hinged ears 11 are provided at the top of the left leg and the right leg, and the left leg and the right leg are hinged through the hinged ears 11, and a platform is also connected between adjacent hinged ears 11, and the platform is used to fix the force-applying mechanism 2;

[0060] The platform is also provided with a through hole at a position corresponding to the pull rope, so that the pull rope can pass through the platform without hindrance through the through hole.

[0061] The openable bracket 1 can adjust the distance between the left leg and the right leg to adapt to anti-corrosion steel pipes of different diameters.

[0062] On the basis of the above technical solution, the force applying mechanism 2 comprises:

[0063] A pair of fixing plates 21, wherein the pair of fixing plates 21 are fixed in parallel to the platform;

[0064] A rope wheel 22, wherein a rotating shaft is provided at the center of both end surfaces of the rope wheel 22, and the rope wheel 22 is hinged between the fixing plates 21 through the rotating shaft. A groove 221 is provided on the circumferential surface of the rope wheel 22, and the pull rope is wound in the groove 221;

[0065] A driver is used for driving the rope wheel 22 to rotate.

[0066] By driving the rope pulley 22 forward and reversely, the pull rope can be retracted and released; usually before the test, the pull rope is first lengthened to allow the clamp 4 to clamp the anti-corrosion layer, and then the pull rope is gradually tightened. Under the action of the pull rope, the dynamometer 3, the clamp 4 and the anti-corrosion layer are gradually tightened. After tightening, the dynamometer 3 can display the adhesion between the anti-corrosion layer and the steel pipe (when static).

[0067] On the basis of the above technical solution, the driver is a crank 23', one end of which is fixedly connected to the rotating shaft of the rope wheel 22;

[0068] The crank 23' is a single-handle crank or a double-handle crank, which can be operated with one hand or two hands. The double-handle crank can be used to crank the rope wheel 22 with both hands, so that the rope wheel 22 rotates more smoothly.

[0069] On the basis of the above technical solution, the driver is a push rod 23, the front end of the push rod 23 is forked into a pair of paddles, and the pair of paddles are respectively hinged to the rotating shafts at both ends of the rope wheel 22;

[0070] The rope wheel 22 is also provided with two circles of ratchet teeth 222;

[0071] The paddle is also hinged with a push pawl 231 adapted to the ratchet 222;

[0072] The fixing plate 21 is further provided with a limiting pawl 24 adapted to the ratchet teeth 222 .

[0073] In this embodiment, the clockwise rotation of the rope wheel 22 will tighten the pull rope, so the push rod 23 needs to be lifted upward, and the pushing pawl 231 on the push rod 23 will drive the rope wheel 22 with the ratchet 222 to rotate clockwise to tighten the pull rope. Under the action of the limiting pawl 24, the rope wheel 22 will not retreat during the rotation process, and can only ensure unidirectional rotation, thereby ensuring that the force on the dynamometer 3 is stable. The limiting pawl 24 is equipped with a reset spring, which is a common technology and will not be explained in detail.

[0074] On the basis of the above technical solution, protective nets 12 are provided on the sides of the left leg and the right leg.

[0075] At the moment when the anti-corrosion layer is peeled off from the substrate under stress, the clamp 4 and the dynamometer 3 are likely to collapse and may hit the operator nearby, but the protective net 12 can prevent this from happening.

[0076] On the basis of the above technical scheme, a limiting mechanism is also provided on the side of the left leg and the right leg, and the limiting mechanism includes a limiting pin 132 and a limiting strip 131, and the limiting pin 132 and the limiting strip 131 are respectively arranged on the left leg and the right leg, and the limiting strip 131 is also provided with a plurality of through holes or slots adapted to the limiting pin 132, wherein the limiting pin 132 can be fixed or axially movable and can be pressed to adjust the position; when the limiting pin 132 is fixed, there is a slot on the limiting strip 131, and the limiting strip 131 can snap the slot into the limiting pin 132 when it is flipped; when the limiting pin 132 is a pressable axially movable structure, the limiting strip 131 is a through hole, and when the through hole is aligned with the limiting pin 132, the limiting pin 132 is pressed to pass through the through hole to achieve fixation.

[0077] The limit mechanism is used to adjust and fix the opening and closing angles of the left leg and the right leg to provide stable support.

[0078] On the basis of the above technical solution, rollers 14 are provided at the bottom of the left leg and the right leg, and the rotation direction of the rollers 14 is consistent with the opening and closing direction of the bracket 1.

[0079] The roller 14 can move along the radial direction of the anti-corrosion steel pipe to adjust the position of the bracket 1 on the anti-corrosion steel pipe.

[0080] On the basis of the above technical solution, the bracket 1 is provided with a horizontal bubble meter or a plumb line.

[0081] A horizontal bubble meter or a plumb line is used to ensure that the point where the clamp 4 clamps the anti-corrosion layer, the dynamometer 3, and the straight line formed by the pull rope are perpendicular to the anti-corrosion steel pipe to avoid deviation in the force direction and affect the accuracy of the measurement results.

[0082] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, ordinary technicians in this field should understand that they can still modify the technical solutions recorded in the aforementioned embodiments, or replace some or all of the technical features therein with equivalents. However, these modifications or replacements do not make the essence of the corresponding technical solution deviate from the scope of the technical solution of the embodiments of the utility model.

Claims

1. A three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand, characterized in that: include: Bracket; A force applying mechanism, the force applying mechanism is arranged at the top end of the bracket, the force applying mechanism comprises a pull rope, the pull rope passes through the top end of the bracket and extends into the bottom of the bracket; a dynamometer, one end of which is connected to the pull rope; A clamp is connected to the other end of the dynamometer and is used to clamp the anti-corrosion layer.

2. The three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand according to claim 1 is characterized in that: The bracket comprises a left leg and a right leg, a pair of hinged ears are provided at the top of the left leg and the right leg, the left leg and the right leg are hinged through the hinged ears, and a platform is connected between adjacent hinged ears, and the platform is used to fix the force applying mechanism; The platform is also provided with a through hole at a position corresponding to the pull rope.

3. The three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand according to claim 2 is characterized in that: The force applying mechanism comprises: a pair of fixing plates, wherein the pair of fixing plates are fixed in parallel to the platform; A rope wheel, wherein a rotating shaft is provided at the center of both end surfaces of the rope wheel, the rope wheel is hinged between the fixing plates through the rotating shaft, a groove is provided on the circumferential surface of the rope wheel, and the pull rope is wound in the groove; A driver is used for driving the rope wheel to rotate.

4. The three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand according to claim 3 is characterized in that: The driver is a crank, one end of which is fixedly connected to the rotating shaft of the rope wheel; The crank is a single-handle crank or a double-handle crank.

5. The three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand according to claim 3 is characterized in that: The driver is a push rod, the front end of which is forked into a pair of paddles, and the pair of paddles are respectively hinged to the rotating shafts at both ends of the rope wheel; The rope wheel is also provided with two circles of ratchets; The paddle is also hinged with a pushing pawl adapted to the ratchet; The fixing plate is also provided with a limiting pawl matched with the ratchet.

6. The three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand according to claim 2 is characterized in that: The sides of the left supporting leg and the right supporting leg are both provided with protective nets.

7. The three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand according to claim 2 is characterized in that: A limiting mechanism is also provided on the side of the left leg and the right leg, and the limiting mechanism includes a limiting nail and a limiting strip. The limiting nail and the limiting strip are respectively arranged on the left leg and the right leg, and the limiting strip is also provided with a plurality of through holes or slots adapted to the limiting nails.

8. The three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand according to claim 7 is characterized in that: Rollers are provided at the bottom of the left leg and the right leg, and the rotation direction of the rollers is consistent with the opening and closing direction of the bracket.

9. The three-PE anti-corrosion steel pipe anti-corrosion layer adhesion test stand according to any one of claims 1 to 8, characterized in that: A horizontal bubble meter or a plumb line is arranged on the bracket.

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