High-temperature tool for peel strength test of steel-plastic conversion pipe fitting

Abstract

The utility model discloses a high-temperature tool for a peel strength test of a steel-plastic conversion pipe fitting, and belongs to the technical field of pipe fitting experiment tools. The tool comprises a heating and heat preservation cover serving as a tool body structure. The heating and heat preservation cover comprises a shell, a heat preservation layer and a heat conduction layer. A heating coil is arranged between the heat preservation layer and the heat conduction layer, and a heating space for the pipe fitting is formed in the heat conduction layer. A temperature detection sensor is arranged in the shell; annular heat preservation plates are arranged on the two sides of the shell. The high-temperature tool provided by the utility model can locally heat the pipe fitting, can retain the whole structure of the pipe fitting, and ensures the primitiveness of test data; a nearly totally-enclosed heat-insulating layer, a heating ring and a heat-conducting layer laying method are adopted, so that the heating and heat-insulating process is easier to control; and two temperature detection sensors are arranged, so that the control stability of the root temperature of the stripping strip can be improved, the problems that fluids such as gas or liquid are heated unevenly and the temperature is not easy to control in other heating modes are solved, and the experiment accuracy is improved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pipe fitting experimental tool technical field, concretely relates to a kind of high-temperature tool for stripping strength test of steel plastic conversion pipe fitting. BACKGROUND

[0002] GB / T 26255-2022 requires to detect the stripping performance of 3PE steel plastic conversion under the highest operating temperature ±5 ℃, so as to obtain the bonding corrosion protection performance of product under the highest operating temperature. There is no professional and simple equipment or tool at present, and the industry generally uses oven heating and water bath heating method to pretreat pipe fitting, so that it rises to the required temperature, and then is transferred to stripping strength testing machine for stripping strength test, or high and low temperature stripping equipment is introduced to test product stripping strength;

[0003] The former needs to set an oven or water bath heating equipment and a stripping strength testing machine, to ensure stable pipe fitting temperature, and the transfer process of high-temperature pipe fitting must be fast enough, and the latter installs a large oven or water bath heating equipment on stripping strength testing machine, which avoids experimental error caused by transfer process, but the oven is heavy and not easy to move, not only that, but also has the shortcomings of high equipment cost, large floor area, large energy consumption and low efficiency. UTILITY MODEL CONTENTS

[0004] In view of the above problems existing in the prior art, the utility model aims to provide a high-temperature tool for stripping strength test of steel plastic conversion pipe fitting, which can realize local heating of pipe fitting, has high experimental accuracy, simple structure, low processing cost and test cost.

[0005] The utility model provides the following technical scheme: a high-temperature tool for stripping strength test of steel plastic conversion pipe fitting, which comprises a heating and heat preservation cover as a tool main body structure, the heating and heat preservation cover comprises an outer shell with open structure on both sides, a heat preservation layer laid on the inner wall of the outer shell and a heat conduction layer laid on the inner side of the heat preservation layer; a heating coil is arranged between the heat preservation layer and the heat conduction layer, and a heating space for pipe fitting is formed in the heat conduction layer; a temperature detection sensor for measuring the heating temperature of the heating coil and the internal temperature of the heat conduction layer is arranged in the outer shell; heat preservation plates are arranged on both sides of the outer shell, and through holes for pipe fitting to pass through are formed in the heat preservation plates.

[0006] Further, the heat preservation plates are detachably arranged on both sides of the outer shell.

[0007] Further, mounting clamping grooves matched with the heat preservation plates are arranged at both ends of the outer shell; an opening is arranged on the mounting clamping groove, and sheet materials for fastening are arranged on both sides of the opening, and the two sheet materials are connected by fasteners.

[0008] Further, the heat preservation layer and the heat conduction layer are provided with a first temperature detection sensor for measuring the heating temperature of the heating coil, and the heat conduction layer is internally provided with a second temperature detection sensor for measuring the internal temperature thereof.

[0009] Further, the shell is provided with an access opening connected with the heating coil, and the outer side of the access opening is provided with an access opening fixing strip.

[0010] Further, the shell is provided with an opening and closing hole, and the opening and closing hole is provided with an opening and closing cover, and the opening and closing cover is provided with a heat-resistant sealing strip.

[0011] Further, the bottom of the shell is provided with a support structure.

[0012] By adopting the above-mentioned technology, compared with the prior art, the beneficial effects of the utility model are as follows:

[0013] 1) The high-temperature tool can locally heat the pipe fitting, avoids the problem that the pipe fitting needs to be destructively machined and cut off due to being too long in the oven or water bath heating process, the overall structure of the pipe fitting is reserved, and the originality of the test data is ensured.

[0014] 2) The nearly fully-closed heat preservation layer, the heating ring and the heat conduction layer laying method make the heating and heat preservation process more controllable, and the two temperature detection sensors can improve the control stability of the temperature at the root of the stripping strip, solve the problem that the gas or liquid fluid is not uniformly heated and the temperature is not easy to control in other heating modes, and improve the accuracy of the experiment.

[0015] 3) In the utility model, the detachable mounting structure design of the heat preservation plate can adapt to the experimental installation requirements of pipe materials of different sizes. DRAWINGS

[0016] Fig. 1 It is a three-dimensional structure schematic diagram of the utility model;

[0017] Fig. 2 It is a longitudinal section structure schematic diagram of the whole utility model;

[0018] Fig. 3 It is a section structure schematic diagram of the heat preservation plate of the utility model. DETAILED DESCRIPTION

[0019] In order to make the purpose, technical scheme and advantages of the utility model more clear and obvious, the utility model is further described in detail in combination with the drawings and examples of the specification. It should be understood that the specific examples described herein are only used to explain the utility model, and are not used to limit the utility model.

[0020] On the contrary, the utility model covers any alternative, modification, equivalent method and scheme made on the essence and scope of the utility model defined by the claim. Further, in order to enable the public to have better understanding of the utility model, in the following detailed description of the utility model, some specific details are described in detail. The utility model can also be completely understood without the description of these details for those skilled in the art.

[0021] Embodiments:

[0022] Please refer to Figs. 1-3 A high-temperature tool for peel strength test of steel-plastic conversion pipe fittings, comprising a heating and heat preservation cover, the heating and heat preservation cover is a tool main body, which comprises an outer shell 1, a heat preservation layer 2, a heat conduction layer 3, a heating coil, a heat preservation plate 5, a first temperature detection sensor and a second temperature detection sensor.

[0023] Specifically, the outer shell 1 is a cylindrical structure with two open sides, and an opening and closing hole is formed in the outer shell 1, and an opening and closing cover 6 is arranged at the opening and closing hole to realize the opening and closing of the hole, and a handle structure is arranged on the opening and closing cover 6 for convenient hand holding; the opening and closing hole serves as an observation hole and an operation hole, the opening and closing hole is closed during the preheating process, and is opened during the peeling process, and the clamp moves up and down through the opening and closing hole.

[0024] Specifically, the heat preservation layer 2 is laid on the inner wall of the outer shell 1, and the material thereof is preferably high-temperature-resistant heat-insulating asbestos; the heat conduction layer 3 is laid on the inner side of the heat preservation layer 2, and the material thereof is preferably ceramic sheet with excellent heat conduction performance.

[0025] Specifically, the heating coil is arranged between the heat preservation layer 2 and the heat conduction layer 3, and the inlet of the heating coil 4 extends out of the outer shell 1, and an interface fixing strip 8 for assisting in fixing and protecting the plug of the inlet line is arranged on the outer shell 1.

[0026] Specifically, since the surface temperature of the pipe fitting and the air temperature on the surface of the pipe fitting cannot change immediately with the change of the temperature of the heating coil, a first temperature detection sensor for measuring the heating temperature of the heating coil is arranged between the heat preservation layer 2 and the heat conduction layer 3, and a second temperature detection sensor for measuring the internal temperature of the heat conduction layer 3 is arranged inside the heat conduction layer 3. The first temperature detection sensor and the second temperature detection sensor are both contact type temperature detection sensors.

[0027] By controlling the temperature T1 of the first temperature detection sensor (90℃≤T1≤95℃), the temperature of the second temperature detection sensor is maintained at 70℃-75℃, and the second contact type temperature detection sensor is arranged 2-3 cm below the geometric center of the cavity.

[0028] Specifically, the heat preservation plates 5 are detachably installed on the two sides of the outer shell 1, and the heat preservation plates are annular structures with hollow structures, and through holes are arranged in the middle portions of the heat preservation plates for the pipe to pass through.

[0029] The inner side of the both side ends of the shell 1 is provided with a mounting clamping groove 101, the heat preservation plate 5 is placed in the mounting clamping groove 101, the mounting clamping groove 101 is provided with an opening, the both sides of the opening are provided with a roll-shaped sheet 102, the roll-shaped sheet 102 is provided with a supporting round rod 103, the fastener 7 passes through the both sides of the sheet 102 and the round rod 103, and the heat preservation plate 5 placed in the mounting clamping groove 101 is limited.

[0030] Specifically, the lower part of the shell 1 is provided with a height-adjustable support or the shell 1 is placed on the adjustable support, so that the overall height of the heating heat preservation cover is adjusted.

[0031] The process of using the tooling of the embodiment to carry out the experiment is as follows:

[0032] During the experiment, the anticorrosive layer of the pipe fitting is first cut along the circumferential direction to cut through the anticorrosive layer, and one end of the peeled strip is pried up, the width is about 20mm, and the length is at least 160mm. The heat preservation cover is horizontally arranged in the area of the pried steel-plastic conversion pipe fitting through the through hole of the heat preservation plate 5 on the two sides of the heating heat preservation cover. The pipe fitting is arranged on the two end clamps of the peeling test machine, and the rotation is controlled through the rotating device arranged on the clamp.

[0033] The heating of the heating coil, the start and stop of the peeling test machine and the rotating device are all controlled through the centralized control box.

[0034] When the heating heat preservation cover works, the temperature of the heating coil is raised through the temperature feedback of the first contact type temperature detection sensor and the control and adjustment of the centralized control box, the heat is transferred to the heat conduction layer 3, so that the heat conduction layer 3 is also heated to a sufficient temperature, the heat conduction layer 3 further heats the air in the cover and transfers the heat to the pipe fitting and the second contact type temperature detection sensor, and the heating temperature of the heating coil is further adjusted under the temperature feedback of the sensor. At the same time, the rotating speed of the pipe fitting is controlled through the centralized control box. When the inner and outer surfaces of the pipe fitting are heated to the specified temperature, the heating is stopped, the opening and closing cover 6 is opened, the anticorrosive strip is clamped by the traction machine clamp, and the peeling strength test is prepared. When the temperature drops to the upper limit of the set highest operating temperature, the anticorrosive strip is pulled up vertically on the pipe fitting surface at a speed of 10mm / min. When the temperature drops to the lower limit, the measurement is ended.

[0035] The above only describes the preferred embodiment of the utility model, and does not limit the utility model, and any modification, equivalent replacement and improvement within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A high-temperature tooling for peel strength testing of steel-plastic conversion pipe fittings, characterized in that, The utility model relates to a heating and heat preservation cover which comprises a heating and heat preservation cover as a tool main structure, an outer shell (1) with open structure on both sides, a heat preservation layer (2) laid on the inner wall of the outer shell (1) and a heat conduction layer (3) laid on the inner side of the heat preservation layer (2), a heating coil is arranged between the heat preservation layer (2) and the heat conduction layer (3), the inside of the heat conduction layer (3) forms a heating space for pipe fittings, a temperature detection sensor is arranged in the outer shell (1) for measuring the heating temperature of the heating coil and the internal temperature of the heat conduction layer (3), heat preservation plates (5) are arranged on both sides of the outer shell (1), and through holes are formed in the heat preservation plates (5) for facilitating the pipe to pass through.

2. The high-temperature tool for peel strength testing of a steel-to-plastic transition fitting according to claim 1, characterized in that, The heat preservation plates (5) are detachably arranged on both sides of the outer shell.

3. The high temperature tool for peel strength testing of a steel-to-plastic transition fitting according to claim 2, characterized in that Mounting clamping grooves (101) are arranged at both ends of the outer shell and matched with the heat preservation plates (5), openings are arranged on the mounting clamping grooves (101), fastening sheets (102) are arranged on both sides of the openings, and the two fastening sheets (102) are connected by a fastener (7).

4. The high temperature tool for peel strength testing of a steel-to-plastic transition fitting according to claim 1, characterized in that, First temperature detection sensors are arranged between the heat preservation layer (2) and the heat conduction layer (3) for measuring the heating temperature of the heating coil, and second temperature detection sensors are arranged in the heat conduction layer (3) for measuring the internal temperature thereof.

5. The high temperature tool for peel strength testing of a steel-to-plastic transition fitting according to claim 1, characterized in that, An access port (4) is arranged on the outer shell (1) and connected with the heating coil, and an interface fixing strip (13) is arranged on the outer side of the access port (4).

6. The high temperature tool for peel strength testing of a steel-to-plastic transition fitting according to claim 1, characterized in that, An opening and closing hole is arranged on the outer shell, an opening and closing cover (6) is arranged at the opening and closing hole, and a heat-resistant sealing strip is arranged on the opening and closing cover (6).

7. The high temperature tool for peel strength testing of a steel-to-plastic transition fitting according to claim 1, characterized in that, A supporting structure is arranged at the bottom of the outer shell (1).

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