Testing machine for testing creep property of plastic pipe

Abstract

The utility model provides a plastic pipe creep property testing machine which comprises a base and a frame, and the frame is fixedly connected to the middle of the top surface of the base. Compared with the prior art, the device has the advantages that the lower part of the counter weight is innovatively designed, the horizontal infrared transmitter is arranged, and the infrared transmitter transmits infrared rays to the scale plate on the inner side of the frame, so that the length reading is very clear during initial reading and final reading, and the length data of the plastic pipe after creeping and before creeping can be quickly, efficiently and clearly read; the infrared transmitter and the scale plate are used in a combined mode, errors possibly caused by a traditional measuring method are avoided, and the measuring accuracy and efficiency are improved. And the length change of the plastic pipe before and after creep deformation can be accurately measured, which is crucial for evaluating the creep deformation performance of the plastic pipe. The high-precision measurement data is helpful for users to more accurately understand the performance characteristics of the plastic pipe, and powerful support is provided for design and improvement of products.

Description

Technical Field

[0001] This utility model relates to the field of plastic pipe experimental technology, and in particular to a testing machine for testing the creep performance of plastic pipes. Background Technology

[0002] Creep performance testing of plastic pipes can evaluate their deformation behavior under sustained stress over long periods. By simulating the temperature and stress conditions in real-world applications, the creep performance of plastic pipes is tested, thereby predicting their long-term stability and durability. This is crucial for ensuring the reliability and safety of plastic pipes in practical applications.

[0003] When testing the creep performance of plastic tubes, holes are pre-drilled at both ends of the workpiece (plastic tube). The top of the workpiece is inserted into a positioning sleeve, and a pin is inserted into the pre-drilled hole of the workpiece to connect the positioning sleeve and the workpiece. Fasteners are then used to secure the workpiece, thus loading it. A pin is inserted into the bottom of the workpiece, and fasteners are installed at both ends of the pin. The fasteners are screwed onto both sides of the workpiece. Hanging ropes are attached to the grooves on both sides of the pin, and a counterweight is fixedly connected to the bottom of the hanging rope. The counterweight applies a continuous tensile stress to the workpiece (plastic tube). The length of the workpiece before the test is recorded, and the length after the creep test is recorded after a period of time. The difference between the two lengths represents the creep data over that time period. In existing technology, the workpiece length is recorded by a technician holding a measuring tape. Inaccurate measurement results due to the measuring tape not being held straight or the scale not being read accurately can lead to errors. Therefore, a new plastic tube creep performance testing machine is proposed to solve these problems. Utility Model Content

[0004] The purpose of this invention is to at least solve one of the aforementioned technical defects.

[0005] Therefore, one objective of this utility model is to propose a testing machine for the creep performance of plastic pipes, so as to solve the problems mentioned in the background art and overcome the shortcomings of the existing technology.

[0006] To achieve the above objectives, one embodiment of the present invention provides a plastic pipe creep performance testing machine, including a base and a frame, wherein the frame is fixedly connected to the middle of the top surface of the base;

[0007] A scale plate is fixedly connected to one inner side of the frame, and the scale plate is provided with length markings;

[0008] A positioning sleeve is detachably connected to the top surface of the inner side of the frame. A workpiece is inserted into the positioning sleeve. A pin is inserted into the top of the positioning sleeve and the workpiece. A fastener is threaded to the end of the pin.

[0009] A pin is inserted into the bottom end of the workpiece, and two fasteners are threaded onto the pin and tightened on both sides of the workpiece.

[0010] The pin has grooves at both ends, in which a hanging rope is hung, and a counterweight is fixedly connected to the bottom end of the hanging rope.

[0011] An infrared emitter is fixedly connected to the bottom of the counterweight, and the infrared emitter emits infrared rays onto the scale plate.

[0012] Preferably, in any of the above solutions, the base is welded to the frame, and the frame is in the form of a gantry frame.

[0013] The above technical solution is adopted: This device is specifically used for testing the creep performance of plastic pipes. The creep performance test of plastic pipes is a test to evaluate the ability of plastic pipes to deform over time under continuous stress. This deformation may be slow and partially irreversible, and may ultimately affect the performance and life of the material.

[0014] Preferably, in any of the above embodiments, the scale plate is installed vertically, and the scale plate is installed by a number of screws.

[0015] The above technical solution is adopted: the loading method of this device involves pre-drilling holes at both ends of the workpiece, i.e., the plastic tube, inserting the top end of the workpiece into the positioning sleeve, using a pin to connect the positioning sleeve and the reserved hole of the workpiece, and then fastening it with fasteners, thereby realizing the loading of the workpiece.

[0016] Preferably, in any of the above solutions, the positioning sleeve is detachably connected to the frame via a flange and screws, and the positioning sleeve is made of plastic.

[0017] The above technical solution is as follows: When this device is used, holes are pre-drilled at both ends of the workpiece, i.e., the plastic tube. The top end of the workpiece is inserted into the positioning sleeve. A pin is inserted into the positioning sleeve and the reserved hole of the workpiece, and then fasteners are used to fix it, thereby realizing the loading of the workpiece. A pin is inserted into the bottom end of the workpiece, and fasteners are installed at both ends of the pin. The fasteners are screwed on both sides of the workpiece. Hanging ropes are hung on the grooves on both sides of the pin. The bottom end of the hanging rope is fixedly connected to the counterweight. The counterweight applies a continuous tensile stress to the workpiece, i.e., the plastic tube. The length of the workpiece before the test is recorded. After a period of time, the length of the workpiece after the creep test is recorded. The difference between the two lengths is the creep data at this time.

[0018] Preferably, of any of the above solutions, the fastener is a nut, and the groove is symmetrically arranged about the center plane of the pin.

[0019] The core structure of this device, employing the above technical solution, consists of a frame, scale plate, positioning sleeve, pin, fastener, groove, hanging rope, counterweight, and infrared emitter. The key advantages of this device are: the positioning sleeve, used for positioning and installing the plastic tube, is detachably installed inside the frame via flanges and screws. Different models of positioning sleeves can be installed to load plastic tubes of different sizes for testing. The pins have symmetrical grooves at both ends to hang the hanging rope for applying the counterweight, ensuring stable load application during the test. An innovative design incorporates a horizontal infrared emitter below the counterweight. This emitter projects infrared light onto the scale plate inside the frame, providing clear length readings at both the initial and final readings. This allows for rapid, efficient, and clear reading of the plastic tube's length before and after creep, yielding accurate tensile creep data. The combined use of the infrared emitter and scale plate avoids errors that may arise from traditional measurement methods, improving measurement accuracy and efficiency. The ability to accurately measure the length change of the plastic tube before and after creep is crucial for evaluating the creep performance of plastic tubes. High-precision measurement data helps users understand the performance characteristics of plastic pipes more accurately, providing strong support for product design and improvement.

[0020] The length readings are very clear, allowing users to easily observe and record test data. This not only simplifies the testing process but also improves the traceability and reliability of the data.

[0021] Preferably, in any of the above embodiments, the counterweight is in the shape of a disc, and the infrared emitter is installed horizontally.

[0022] Compared with the prior art, the advantages and beneficial effects of this utility model are as follows:

[0023] This plastic pipe creep performance testing machine, through the coordinated setup of a frame, scale plate, positioning sleeve, pins, fasteners, grooves, hanging ropes, counterweights, and infrared emitters, allows for the positioning of the plastic pipe. The positioning sleeves, detachably installed inside the frame via flanges and screws, can accommodate different models of positioning sleeves to load plastic pipes of varying sizes for testing. Symmetrical grooves at both ends of the pins allow for the attachment of hanging ropes to apply the counterweight, ensuring stable load application during the test. An innovative design incorporates a horizontal infrared emitter below the counterweight. This emitter projects infrared light onto the scale plate inside the frame, providing clear length readings at both the initial and final stages. This allows for rapid, efficient, and clear readings of the plastic pipe's length before and after creep, yielding accurate tensile creep data. The combined use of the infrared emitter and scale plate avoids errors that may arise with traditional measurement methods, improving measurement accuracy and efficiency. The ability to accurately measure the length change of the plastic pipe before and after creep is crucial for evaluating its creep performance. High-precision measurement data helps users understand the performance characteristics of plastic pipes more accurately, providing strong support for product design and improvement.

[0024] The length readings are very clear, allowing users to easily observe and record test data. This not only simplifies the testing process but also improves the traceability and reliability of the data.

[0025] Additional aspects and advantages of this invention will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of the invention. Attached Figure Description

[0026] The above and / or additional aspects and advantages of this utility model will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:

[0027] Figure 1 This is a first-view structural schematic diagram of the present invention;

[0028] Figure 2 This is a structural schematic diagram of the present invention from a second perspective;

[0029] Figure 3 This is a structural schematic diagram of the present invention from a third-view perspective;

[0030] Figure 4 This utility model Figure 2 A magnified structural diagram of point A in the middle.

[0031] In the diagram: 1-base, 2-frame, 3-scale plate, 4-positioning sleeve, 5-workpiece, 6-pin, 7-fastener, 8-groove, 9-hanging rope, 10-counterweight, 11-infrared transmitter. Detailed Implementation

[0032] The embodiments of this utility model are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and intended to explain this utility model, and should not be construed as limiting this utility model.

[0033] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0034] like Figure 1-4As shown, this plastic pipe creep performance testing machine includes a base 1 and a frame 2, with the frame 2 fixedly connected to the middle of the top surface of the base 1.

[0035] A scale plate 3 is fixedly connected to one inner side of the frame 2, and the scale plate 3 is provided with length scale.

[0036] A positioning sleeve 4 is detachably connected to the top surface of the inner side of the frame 2. A workpiece 5 is inserted into the positioning sleeve 4. A pin 6 is inserted into the top of the positioning sleeve 4 and the workpiece 5. A fastener 7 is threaded to the end of the pin 6.

[0037] A pin 6 is inserted into the bottom end of the workpiece 5, and two fasteners 7 are threaded onto the pin 6 and tightened on both sides of the workpiece 5.

[0038] The pin 6 has grooves 8 at both ends, and a hanging rope 9 is hung in the grooves 8. A counterweight 10 is fixedly connected to the bottom end of the hanging rope 9.

[0039] An infrared emitter 11 is fixedly connected to the bottom of the counterweight 10, and the infrared emitter 11 emits infrared rays onto the scale plate 3.

[0040] Example 1: The base 1 is welded to the frame 2, and the frame 2 is in the form of a gantry frame. This device is specifically used for testing the creep performance of plastic pipes. Creep performance testing of plastic pipes is an experiment to evaluate the ability of plastic pipes to deform over time under continuous stress. This deformation may be slow and partially irreversible, ultimately affecting the material's performance and lifespan. The scale plate 3 is installed vertically and is secured by several screws.

[0041] Example 2: The loading method of this device involves pre-drilling holes at both ends of the workpiece 5 (the plastic tube). The top end of the workpiece 5 is inserted into the positioning sleeve 4. A pin 6 is inserted into the pre-drilled holes of the positioning sleeve 4 and the workpiece 5, and then fastened with a fastener 7 to achieve loading of the workpiece 5. The positioning sleeve 4 is detachably connected to the frame 2 via a flange and screws, and the positioning sleeve 4 is made of plastic. The fastener 7 is a nut, and the groove 8 is symmetrically arranged about the center surface of the pin 6. The counterweight 10 is disc-shaped, and the infrared emitter 11 is horizontally mounted.

[0042] The working principle of this utility model is as follows:

[0043] Holes are pre-drilled at both ends of workpiece 5, i.e., the plastic tube. The top end of workpiece 5 is inserted into positioning sleeve 4. Pins 6 are inserted into the pre-drilled holes of positioning sleeve 4 and workpiece 5, and then fastened with fasteners 7 to load workpiece 5. A pin 6 is inserted into the bottom end of workpiece 5, and fasteners 7 are installed at both ends of pin 6. Fasteners 7 are screwed onto both sides of workpiece 5. Hanging ropes 9 are hung on the grooves 8 on both sides of pin 6. The bottom end of hanging ropes 9 is fixedly connected to counterweights 10. Counterweights 10 apply a continuous tensile stress to workpiece 5, i.e., the plastic tube. The length of workpiece 5 before the test is recorded. After a period of time, the length of workpiece 5 after the creep test is recorded. The difference between the two lengths is the creep data at this time.

[0044] Compared with the prior art, the present invention has the following advantages:

[0045] This plastic pipe creep performance testing machine, through the coordinated setup of frame 2, scale plate 3, positioning sleeve 4, pin 6, fastener 7, groove 8, hanging rope 9, counterweight 10, and infrared emitter 11, allows for the positioning and installation of the plastic pipe. The positioning sleeve 4 is detachably installed inside the frame 2 via flanges and screws, allowing for the installation of different models of positioning sleeve 4 to load plastic pipes of different sizes for testing. The pin 6 has symmetrical grooves 8 at both ends to hang the hanging rope 9 for applying the counterweight 10, ensuring stable load application during the test. An innovative design incorporates a horizontal infrared emitter 11 installed below the counterweight 10. The infrared emitter 11 emits infrared rays onto the scale plate 3 inside the frame 2, providing clear length readings at both the initial and final readings. This allows for quick, efficient, and clear reading of the plastic pipe's length before and after creep, obtaining accurate tensile creep data. The combined use of the infrared emitter 11 and the scale plate 3 avoids errors that may arise from traditional measurement methods, improving measurement accuracy and efficiency. The ability to accurately measure the length change of plastic tubes before and after creep is crucial for evaluating their creep performance. High-precision measurement data helps users understand the performance characteristics of plastic tubes more accurately, providing strong support for product design and improvement.

[0046] The length readings are very clear, allowing users to easily observe and record test data. This not only simplifies the testing process but also improves the traceability and reliability of the data.

Claims

1. A creep performance testing machine for plastic pipes, characterized in that, Includes a base (1) and a frame (2), with the frame (2) fixedly connected to the middle of the top surface of the base (1); A scale plate (3) is fixedly connected to one inner side of the frame (2), and length scales are provided on the scale plate (3); The top surface inside the frame (2) is detachably connected to a positioning sleeve (4), a workpiece (5) is inserted into the positioning sleeve (4), and a pin (6) is inserted into the top of the positioning sleeve (4) and the workpiece (5). A fastener (7) is threaded to the end of the pin (6). A pin (6) is inserted into the bottom end of the workpiece (5), and two fasteners (7) are threaded onto the pin (6) and tightened on both sides of the workpiece (5). The pin (6) has grooves (8) at both ends, and a hanging rope (9) is hung in the grooves (8). A counterweight (10) is fixedly connected to the bottom end of the hanging rope (9). An infrared emitter (11) is fixedly connected to the bottom of the counterweight (10), and the infrared emitter (11) emits infrared rays onto the scale plate (3).

2. The creep performance testing machine for plastic pipes as described in claim 1, characterized in that: The base (1) is welded to the frame (2), and the frame (2) is in the form of a gantry frame.

3. The creep performance testing machine for plastic pipes as described in claim 2, characterized in that: The scale plate (3) is installed vertically and is installed by a number of screws.

4. The creep performance testing machine for plastic pipes as described in claim 3, characterized in that: The positioning sleeve (4) is detachably connected to the frame (2) via a flange and screws, and the positioning sleeve (4) is made of plastic.

5. The plastic pipe creep performance testing machine as described in claim 4, characterized in that: The fastener (7) is a nut, and the groove (8) is symmetrical about the center surface of the pin (6).

6. The creep performance testing machine for plastic pipes as described in claim 5, characterized in that: The counterweight (10) is disc-shaped, and the infrared emitter (11) is installed horizontally.

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