Pipe ring creep property testing device

Abstract

The utility model discloses a pipe ring creep property testing device, which comprises a water tank, a water storage cavity is arranged in the water tank, a tested ring pipe is placed in the water storage cavity, the water tank is connected with a detection unit, the detection unit comprises a fixed rod fixed on the water tank, the detection unit comprises a pressing rod rotationally connected on the fixed rod, and the pressing rod is connected with the water tank. The end, away from the fixed end, of the pressing rod is connected with a balance weight unit, and the pressing rod is connected with a loading unit abutting against the tested ring pipe. According to the device, the water tank is arranged, water is injected into the water tank to submerge the tested pipeline, so that the experimental environment is simulated, meanwhile, the fixing rod and the pressing rod are connected to the water tank, and the pressing rod can rotate relative to the fixing rod, so that after the end, away from the fixing rod, of the pressing rod is connected with the counterweight unit, the counterweight unit can rotate relative to the fixing rod; and a rotating tendency taking the joint of the fixed rod and the pressing rod as a rotating fulcrum can be generated.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of long -term performance detection of glass steel pipeline, especially a pipe ring creep performance testing device. BACKGROUND

[0002] The new standard of the determination of ring creep performance of glass fiber reinforced thermosetting plastics (GRP) pipe under wet or dry conditions (GB / T43117-2023 / ISO 10468:2018) is implemented from April 1, 2024. The experimental device in the standard has a compression loading machine, and the loading machine should have a force application system, which can apply load to two parallel action surfaces according to the provisions of 5.2, so that the pipe sample immersed in water and placed horizontally is subjected to vertical compression without vibration, and can maintain a constant vertical compression force within the test time according to the provisions of 10.6. The force measurement accuracy of the loading machine is 1%. The loading machine should ensure that the vertical compression force is not affected by friction and the creep test buoyancy under wet conditions. The loading machine that meets the loading requirements is not cheap, and each sample needs a loading machine. This experiment is a long-term performance experiment, generally with a test cycle of 10,000 hours, and the number of pipe ring samples is large, resulting in high cost.

[0003] For example, the publication number "CN118603738A" discloses "a water-force-heat-chemical multi-field coupled multi-axial test device and test method", which comprises a frame, the inside of the frame is hollow; a sample loading bin is arranged in the sample loading bin, a water inlet hole is arranged at the top of the sample loading bin, and a drainage hole is arranged at the bottom; a load loading mechanism is supported by the frame, the load loading mechanism comprises a plurality of force applying parts, each force applying part acts on the sample loading bin in multiple directions through a loading plate, and part of the loading plates are provided with heating parts; a mixed pressure mechanism is located inside the frame, the mixed pressure mechanism is in communication with the water inlet hole at the top of the sample loading bin, and the mixed pressure mechanism is located above the vertical force applying part. However, in actual application, since a loading machine with high precision needs to be selected, the loading force needs to be controlled with high precision, and the time period required for the ring pipe creep test is relatively long, so the detection cost is relatively high. SUMMARY

[0004] In view of the problems of the prior art in the background art that the loading machine precision is too high and the detection cost is too high, the utility model provides a pipe ring creep performance testing device, which can simplify the detection device, reduce the production cost of the detection device, and ensure the detection precision.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme.

[0006] The utility model provides a kind of pipe ring creep performance testing device, including water tank, water tank is provided with water storage cavity, measured ring pipe is placed in water storage cavity, water tank is connected with detection unit, the detection unit includes fixed rod fixed on water tank, the detection unit includes the pressing rod rotationally connected on fixed rod, the pressing rod is connected with counterweight unit at one end away from fixed end, the pressing rod is connected with the loading unit abutting measured ring pipe.In the application, by setting water tank, water is injected in water tank to cover measured pipeline, to simulate experimental environment, while water tank is connected by fixed rod and pressing rod, and setting pressing rod can be relatively rotated relative to fixed rod, so that the pressing rod can generate rotating tendency with fixed rod and pressing rod connection as rotating fulcrum after connecting counterweight unit on the end away from fixed rod, and connecting loading unit on pressing rod, abutting measured ring pipe by loading unit, to simulate the pressurized working condition of measured ring pipe, while the weight of counterweight unit connected on pressing rod is constant, so as to ensure that the pressure transmitted to measured ring pipe by loading unit is also constant, so that the application can realize accurate experimental simulation effect by such simple structure, while the production cost can be controlled.The connection mode between the pressing rod and the fixed rod includes but is not limited to bearing connection, universal ball connection, hinged hinge connection, etc., which can realize the fixation of the fixed rod relative to the water tank and the rotation of the pressing rod relative to the fixed rod.

[0007] As preferred, the loading unit includes a loading rod connected to the pressing rod and moving synchronously with the pressing rod. The loading unit includes a loading rod that can extend the force transmission range of the pressing rod. The force of the pressing rod can be transmitted to the inside of the water storage cavity through the loading rod. The connection between the loading rod and the pressing rod can be fixed connection, such as welding, or detachable connection, such as bolt connection. The detachable connection can improve the flexibility of the loading rod setting, and the loading rod can be replaced to ensure that the pressing rod can be transmitted to the measured ring pipe when detecting different specifications of the measured ring pipe.

[0008] As preferred, the loading unit includes a loading plate clamped between the loading rod and the measured ring pipe. The loading unit also includes a loading plate clamped between the loading rod and the measured ring pipe, which can improve the stability of force transmission and avoid pressure concentration by squeezing the loading plate, ensuring the uniformity and stability of the pressure.

[0009] As preferred, the loading plate is provided with a bayonet near the loading rod, the loading rod is provided with a top cone near the loading plate, and the top cone abuts the bayonet. The bayonet and the top cone are engaged to ensure the stability of the relative abutting position between the top cone and the bayonet, thereby avoiding the relative position between the loading rod and the loading plate during installation and subsequent detection, ensuring the accuracy of detection.

[0010] As preferred, the fixed rod is provided with a hinged joint, and the pressing rod is connected to the hinged joint and can rotate relative to the fixed rod. The hinged joint can make the pressing rod rotate relative to the fixed rod, so that the pressing rod can generate a rotating tendency after the counterweight unit is connected to the end of the pressing rod, thereby generating a pressing effect on the measured ring.

[0011] As preferred, the pressing rod and the counterweight unit are detachably connected. The detachable connection between the counterweight unit and the pressing rod can make the counterweight unit be flexibly adjusted, thereby improving the adaptability to different detection environments, improving the adjustment range, and ensuring that the accuracy of the counterweight unit meets the experimental requirements.

[0012] As preferred, the water tank is provided with a fixed frame, the fixed frame is connected with a dial gauge, and the dial gauge abuts against the pressing rod. The dial gauge abuts against the pressing rod, so that the inclination change of the pressing rod in the subsequent detection process can be detected, thereby making the detection value more accurate and facilitating data recording.

[0013] As preferred, the fixed frame is provided with an adjustable gauge frame, and the adjustable gauge frame is connected with the dial gauge. The position of the dial gauge can be adjusted according to the experimental requirements through the adjustable gauge frame, thereby improving the flexibility of detection.

[0014] As preferred, the water tank is connected with a plurality of detection units, a plurality of measured ring pipes are placed in the water storage cavity, and each detection unit corresponds to a measured ring pipe. The plurality of detection units arranged on the water tank can simultaneously detect the values of the plurality of measured ring pipes, thereby improving the efficiency of the experiment, and the plurality of measured ring pipes can be detected at the same time, so that the detection cost is reduced.

[0015] As preferred, the pressing rod comprises a main rod located above the water storage cavity, an extension rod end connected to the main rod away from the fixed rod, and the counterweight unit connected to the extension rod end, and the counterweight unit is arranged outside the water storage cavity. The counterweight unit is arranged outside the water storage cavity, so that the counterweight unit is prevented from being in contact with the water injection in the water storage cavity, thereby ensuring the accuracy of the counterweight of the counterweight unit and avoiding the influence of the water injection buoyancy, and the length of the pressing rod is increased, thereby forming a lever structure and achieving counterweight by the light counterweight unit.

[0016] The beneficial effects of the utility model are as follows:

[0017] (1) The detection device can be simplified, the production cost of the detection device can be reduced, and the detection accuracy can be ensured;

[0018] (2) can carry out the detection of multiple groups of measured ring pipes in the same water tank, and further improve the efficiency of the test;

[0019] (3) can form a lever structure by lengthening the pressure rod, is simple and reliable, reduces the weight required by the counterweight unit, avoids the influence of the water injection buoyancy on the counterweight unit, and guarantees the accuracy of the experiment. BRIEF DESCRIPTION OF DRAWINGS

[0020] Figure 1 is the axonometric view of the utility model.

[0021] Figure 2 is the sectional view of the utility model.

[0022] Figure 3 is the local enlarged view of the utility model.

[0023] In the drawing:

[0024] 1 water tank, 11 water storage cavity;

[0025] 2 measured ring pipe;

[0026] 3 detection unit, 31 fixed rod, 311 hinged hinge, 32 pressure rod, 321 main rod, 322 extension rod end, 33 counterweight unit, 34 loading unit, 341 loading rod, 3411 top cone, 342 loading plate, 3421 bayonet;

[0027] 4 fixed frame;

[0028] 5 dial gauge, 51 adjustable gauge stand;

[0029] 6 mold temperature controller. DETAILED DESCRIPTION

[0030] The utility model will be further described below in combination with the drawings and specific embodiments.

[0031] Example 1:

[0032] The new standard of Determination of the wet or dry creep properties of glass fibre reinforced thermosetting plastics (GRP) pipes under ring loading (GB / T 43117-2023 / ISO 10468:2018) is implemented from April 1, 2024. The experimental device in the standard has a compression loading machine, which should have a force application system that can apply a load to two parallel action surfaces according to the provisions of 5.2, so that the pipe sample immersed in water and placed horizontally can be subjected to vertical compression without vibration, and can maintain a constant vertical compression force within the test time according to the provisions of 10.6. The force measurement accuracy of the loading machine is 1%. The loading machine should ensure that the vertical compression force is not affected by friction and the creep test buoyancy under wet conditions. The loading machine that meets the loading requirements is expensive, and each sample needs a loading machine. This experiment is a long-term performance test, generally 10,000 hours per test cycle, and the number of pipe ring samples is large, resulting in high costs. The above problems are solved by the following structure in this embodiment.

[0033] As shown in Figure 1 , a pipe ring creep performance test device, comprising a water tank 1, a water storage cavity 11 is arranged in the water tank 1, and a measured ring pipe 2 is placed in the water storage cavity 11; the water tank 1 is connected with a detection unit 3; the detection unit 3 comprises a fixed rod 31 fixed on the water tank 1; the detection unit 3 comprises a pressing rod 32 rotatably connected to the fixed rod 31; the pressing rod 32 is connected with a counterweight unit 33 at one end away from the fixed end; and the pressing rod 32 is connected with a loading unit 34 abutting against the measured ring pipe 2. In this application, the water tank 1 is provided, and the measured pipe is immersed by injecting water in the water tank 1, so as to simulate the experimental environment. At the same time, the fixed rod 31 and the pressing rod 32 are connected on the water tank 1, and the pressing rod 32 is arranged to be relatively rotatable relative to the fixed rod 31, so that the pressing rod 32 can generate a rotating tendency with the fixed rod 31 and the pressing rod 32 as the rotating fulcrum after the counterweight unit 33 is connected at the end away from the fixed rod 31. The loading unit 34 is connected on the pressing rod 32, and the measured ring pipe 2 is abutted by the loading unit 34, so as to simulate the pressurized working condition of the measured ring pipe 2. Since the weight of the counterweight unit 33 connected on the pressing rod 32 is a constant value, the pressure transmitted to the measured ring pipe 2 by the loading unit 34 of the pressing rod 32 is also constant, so that the application can realize accurate experimental simulation effect by only such simple structure, and the production cost can be controlled. The connection mode between the pressing rod 32 and the fixed rod 31 includes but is not limited to bearing connection, universal ball connection, hinged hinge 311 connection, etc., which can realize that the fixed rod 31 is fixed relative to the water tank 1, and the pressing rod 32 is rotatable relative to the fixed rod 31.

[0034] As shown in Figure 1 , 2As shown in Figure 3, the loading unit 34 includes a loading rod 341, which is connected to a pressure rod 32. The loading rod 341 and the pressure rod 32 move synchronously. The loading unit 34 also includes a loading plate 342, which is clamped between the loading rod 341 and the tested ring tube 2. A bayonet 3421 is provided on the side of the loading plate 342 near the loading rod 341, and a top cone 3411 is provided on the side of the loading rod 341 near the loading plate 342. The top cone 3411 abuts against the bayonet 3421.

[0035] The loading unit 34 includes a loading rod 341, which extends the force transmission range of the pressure rod 32. Through the loading rod 341, the force of the pressure rod 32 can be transmitted to the interior of the water storage chamber 11. The connection between the loading rod 341 and the pressure rod 32 can be a fixed connection, such as welding, or a detachable connection, such as bolting. A detachable connection improves the flexibility of the loading rod 341's placement. When testing different specifications of the tested ring pipe 2, the specifications of the loading rod 341 can be changed to ensure that the pressure rod 32 can transmit force to the tested ring pipe 2. The loading unit 34 also includes a loading plate 342, which is clamped between the loading rod 341 and the tested ring pipe 2. This improves the stability of force transmission and, by squeezing the loading plate 342, avoids pressure concentration, ensuring pressure uniformity and stability. The engagement between the bayonet 3421 and the top cone 3411 ensures a stable relative contact position between the top cone 3411 and the bayonet 3421, thereby preventing relative positioning between the loading rod 341 and the loading plate 342 during installation and subsequent testing, thus ensuring the accuracy of the test.

[0036] like Figure 2 As shown, a hinge 311 is provided on the fixed rod 31, and the pressure rod 32 is connected to the hinge 311. The pressure rod 32 can rotate relative to the fixed rod 31. The hinge 311 allows the pressure rod 32 to rotate relative to the fixed rod 31, so that after the counterweight unit 33 is connected to the end of the pressure rod 32, the pressure rod 32 can generate a rotational tendency, thereby producing a squeezing effect on the tested ring tube 2.

[0037] like Figure 1 As shown, the pressure rod 32 and the counterweight unit 33 are detachably connected. This detachable connection allows for flexible adjustment of the counterweight unit 33, improving its adaptability to different testing environments, expanding its adjustment range, and ensuring that the accuracy of the counterweight unit 33 meets experimental requirements.

[0038] like Figure 1 , 2As shown, the water tank 1 is provided with a fixed frame 4, the fixed frame 4 is connected with a dial gauge 5, the dial gauge 5 abuts against the pressure rod 32. The fixed frame 4 is provided with an adjustable gauge stand 51, the adjustable gauge stand 51 is connected with the dial gauge 5.

[0039] By abutting the dial gauge 5 against the pressure rod 32, the inclination change of the pressure rod 32 in the subsequent detection process can be detected, and the detection value can be more accurate, and the data recording is convenient. The dial gauge 5 can be adjusted in position according to the experimental requirements through the adjustable gauge stand 51, so as to improve the flexibility of detection.

[0040] As shown in the Figure 1 As shown, the water tank 1 is connected with a plurality of detection units 3, and a plurality of measured ring pipes 2 are placed in the water storage cavity 11, and each detection unit 3 corresponds to measure a corresponding measured ring pipe 2. By providing a plurality of detection units 3 on the water tank 1, the numerical value detection of a plurality of measured ring pipes 2 can be carried out synchronously, and the efficiency of the experiment can be improved, and since the same water tank 1 can simultaneously detect a plurality of groups of measured ring pipes 2, the detection cost can be reduced.

[0041] As shown in the Figure 2 As shown, the pressure rod 32 includes a main rod 321 located above the water storage cavity 11, and the main rod 321 is connected with an extension rod end 322 away from the fixed rod 31, and a counterweight unit 33 is connected to the extension rod end 322, and the counterweight unit 33 is arranged outside the water storage cavity 11. The counterweight unit 33 is arranged outside the water storage cavity 11, so as to avoid the counterweight unit 33 from contacting the water injection inside the water storage cavity 11, thereby ensuring the counterweight accuracy of the counterweight unit 33, avoiding the influence of the water injection buoyancy, and increasing the length of the pressure rod 32, thereby forming a lever structure, and the counterweight unit 33 is lighter.

[0042] The assembly and working process of the pipe ring creep performance testing device in the embodiment are as follows: in the embodiment, a water tank 1 is included, wherein the water tank 1 includes a water storage cavity 11 surrounded by side walls and a bottom plate, and the water storage cavity 11 can be filled with water to simulate a detection environment, wherein the water tank 1 is connected with a detection unit 3, the detection unit 3 is further divided into a fixed rod 31 and a pressure rod 32, and the fixed rod 31 and the pressure rod 32 are movably connected together, in the embodiment, a hinge joint 311 is connected to the fixed rod 31, and the fixed rod 31 and the pressure rod 32 are connected together through the hinge joint 311, so that the pressure rod 32 can rotate relative to the fixed rod 31, wherein the fixed rod 31 is fixed on the side wall of the water tank 1 and is reinforced by a reinforcing member, so as to ensure that the position of the fixed rod 31 is fixed relative to the water tank 1.

[0043] Further, in the embodiment, the length of the pressing rod 32 is greater than the width of the water storage tank 1, so the pressing rod 32 comprises a main rod 321 above the water storage cavity 11, and the pressing rod 32 further comprises an extension rod end 322, which is arranged at one end of the main rod 321 away from the fixed rod 31, and the counterweight unit 33 is connected to the extension rod end 322, so that the counterweight unit 33 is arranged outside the water storage cavity 11 and does not contact the water tank 1, and the counterweight unit 33 is connected to the extension rod end 322 to form a lever structure, wherein during operation, the weight of the counterweight unit 33 generates a downward pressure on the extension rod end 322, thereby causing the pressing rod 32 to rotate relative to the fixed rod 31 about the hinged joint 311 as the rotation point.

[0044] Further, in the embodiment, the main rod 321 of the pressing rod 32 is connected to the loading unit 34, which comprises a loading rod 341 fixedly connected to the main rod 321, and the extension direction of the loading rod 341 is towards the inside of the water storage cavity 11, that is, when the measured ring pipe 2 is placed in the water storage cavity 11, the loading rod 341 extends towards one side of the measured ring pipe 2, wherein the loading unit 34 further comprises a loading plate 342 placed on the measured ring pipe 2, and after the loading plate 342 is placed on the measured ring pipe 2, it is pressed and fixed relative to the measured ring pipe 2 by the loading rod 341, that is, during testing, the loading plate 342 is clamped between the loading rod 341 and the measured ring pipe 2; further, a bayonet 3421 is arranged on the loading plate 342, wherein the bayonet 3421 of the loading plate 342 is at the middle position on the loading plate 342, and a top cone 3411 is arranged on the side of the loading rod 341 close to the loading plate 342, which is triangular in the embodiment, and the top cone 3411 abuts on the bayonet 3421, thereby fixing the abutting position between the top cone 3411 and the bayonet 3421, wherein the abutting relationship between the bayonet 3421 and the top cone 3411 can maintain a certain amount of movement, thereby allowing the measured ring pipe 2 to adapt to the change in relative position and angle between the loading plate 342 and the loading rod 341 after being deformed by extrusion, while ensuring the force transmission of the loading rod 341 to the loading plate 342, and also ensuring that the loading plate 342 maintains a relatively stable position between the loading rod 341 and the measured ring pipe 2 without fixed connection; and since the loading rod 341 presses on the measured ring pipe 2 through the loading plate 342, it can avoid pressure concentration and ensure the stability of force transmission, and also maintain the stability of force transmission after the measured ring pipe 2 is deformed by extrusion.

[0045] Further, in the embodiment, the water tank 1 is further provided with a fixing frame 4, the fixing frame 4 transversely passes above the main body rod 321, the fixing frame 4 is provided with an adjustable watch rack 51, a dial gauge 5 is connected to the adjustable watch rack 51, and a detection end of the dial gauge 5 abuts against the pressing rod 32, so that the change amount of the pressing rod 32 in the measuring state can be monitored in real time, and the recording stability of data is ensured.

[0046] Further, in the embodiment, water is injected in the water tank 1, the water tank 1 is connected to the mold temperature controller 6, and then the water temperature in the water tank 1 can be controlled by the mold temperature controller 6, so that the water temperature in the water tank 1 is ensured to be constant, and then the detection environment of the measured ring pipe 2 is ensured to be stable.

[0047] The test flow in the embodiment is as follows: the water tank 1 is a concrete support in the embodiment, the concrete water tank 1 is first placed on the laboratory ground, the fixing rod 31 is fixed on the concrete water tank 1, and then the pressing rod 32 is fixed to the fixing rod 31 through the hinge. After the measured ring pipe is placed in the water tank 1, the loading plate 342 is placed above the measured ring pipe 2, the pressing rod 32 is lowered at this time, the top cone 3411 on the loading rod 341 can contact the bayonet 3421 on the loading plate 342, the weight is hung on the extension rod end 322 as the counterweight unit 33, the pipe inner diameter of the measured ring pipe 2 is measured by the inner diameter ruler, and then the weight of the counterweight unit 33 is finely adjusted until the pipe inner diameter of the measured ring pipe 2 meets the experimental requirements. Water is injected in the water storage cavity 11 in the water tank 1, so that the water surface is higher than the measured ring pipe 2, the water tank 1 is connected to the mold temperature controller 6 through the reserved hole of the water tank 1, and the water temperature is stabilized at 25 degrees. According to the experimental requirements, the dial gauge 5 reading is recorded at intervals, generally for 10,000 hours, data analysis is performed after the dial gauge 5 reading is recorded, and then the experiment is completed.

Claims

1. A pipe ring creep performance testing device, characterized in that, The utility model provides a water tank (1) is provided with water storage cavity (11) in, the water storage cavity (11) is placed with the measured ring pipe (2), the water tank (1) is connected with detection unit (3), the detection unit (3) includes the fixed rod (31) fixed on water tank (1), the detection unit (3) includes the pressing rod (32) rotationally connected on fixed rod (31), the pressing rod (32) is connected with counterweight unit (33) in the fixed end one end away from, the pressing rod (32) is connected with the loading unit (34) of abutting the measured ring pipe (2).

2. A tube ring creep performance testing device as claimed in claim 1, characterized in that The loading unit (34) includes a loading rod (341), the loading rod (341) is connected to the pressing rod (32), and the loading rod (341) moves synchronously with the pressing rod (32).

3. A tube ring creep performance testing device as claimed in claim 2, characterized in that The loading unit (34) includes a loading plate (342), the loading plate (342) is clamped between the loading rod (341) and the measured ring pipe (2).

4. A tube ring creep performance testing device as claimed in claim 3, wherein The loading plate (342) is provided with a bayonet (3421) on the side close to the loading rod (341), the loading rod (341) is provided with a top cone (3411) on the side close to the loading plate (342), and the top cone (3411) abuts the bayonet (3421).

5. The apparatus for testing the creep performance of a tube ring according to claim 1, wherein The fixed rod (31) is provided with a hinged hinge (311), the pressing rod (32) is connected to the hinged hinge (311), and the pressing rod (32) can rotate relative to the fixed rod (31).

6. A tube ring creep performance testing device as claimed in claim 1, wherein, The pressing rod (32) and the counterweight unit (33) are detachably connected.

7. A device for testing the creep performance of a tube ring according to claim 1, characterized in that The water tank (1) is provided with a fixed frame (4), the fixed frame (4) is connected with a dial gauge (5), and the dial gauge (5) abuts the pressing rod (32).

8. A tube ring creep performance testing device as claimed in claim 7, characterized in that The fixed frame (4) is provided with an adjustable gauge stand (51), and the adjustable gauge stand (51) is connected to the dial gauge (5).

9. A device for testing the creep properties of a tube ring according to any one of claims 1-8, characterized in that The water tank (1) is connected with a plurality of detection units (3), the water storage cavity (11) is placed with a plurality of measured ring pipes (2), each detection unit (3) corresponds to a measured ring pipe (2) to be measured.

10. A device for testing the creep properties of a tube ring according to any one of claims 1-8, characterized in that The pressing rod (32) includes a main rod (321) located above the water storage cavity (11), the main rod (321) is connected with an extension rod end (322) away from the fixed rod (31) side, the counterweight unit (33) is connected to the extension rod end (322), and the counterweight unit (33) is arranged outside the water storage cavity (11).

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