Corrugated pipe compressive strength detection device

Abstract

The utility model relates to the technical field of corrugated pipe detection, in particular to a corrugated pipe compressive strength detection device which comprises a base, a supporting frame, a pressure applying rod, a pressure applying plate, a pressure sensor, a limiting pressure cover, a limiting supporting plate and a measuring mechanism, the supporting frame is fixedly arranged on the upper surface of the base, and the pressure applying rod is fixedly arranged at the top of the supporting frame; the pressure applying plate is fixedly arranged at the telescopic end of the pressure applying rod, and the pressure sensor is fixedly arranged at the bottom of the pressure applying plate. The problem that the corrugated pipe pops up and falls off due to uneven stress and the elasticity of the corrugated pipe in the pressing process is avoided, the elastic deformation quantity of the corrugated pipe when the corrugated pipe is pressed to be damaged is effectively measured, the performance of the corrugated pipe can be known conveniently, large elasticity can be generated when the corrugated pipe is broken, and the reliability of the corrugated pipe is improved. The measuring mechanism can be quickly locked when the measuring mechanism is quickly accelerated under the influence of elastic force, so that the accuracy of a measuring result is ensured.

Description

Technical Field

[0001] The utility model relates to the technical field of bellows detection, in particular to a bellows compressive strength detection device. Background Art

[0002] PE corrugated pipe, also known as a corrugated pipe, is an extruded polyethylene plastic protective tube. It is also known as a corrugated pipe due to its annular corrugations on both the inside and outside. It protects cables from damage and offers excellent wear and corrosion resistance. Because PE is more resistant to corrosion, wear, and aging, and is environmentally friendly, it is also commonly used as a stormwater and sewage branch pipe.

[0003] When polyethylene corrugated pipes are used as protective pipes, they are often buried underground. This requires the corrugated pipes themselves to have a certain compressive strength. Therefore, according to the needs of use, the corrugated pipes need to be tested for compressive strength during production. The existing testing methods mainly measure the compressive strength of the corrugated pipes by cutting a section of the corrugated pipe and applying pressure to it, and measuring the maximum pressure that causes it to deform or rupture. However, the deformation of the corrugated pipe is not measured in this process. When measuring the deformation of the corrugated pipe caused by the maximum pressure, when the corrugated pipe ruptures, it will generate instantaneous elastic force on the deformation measurement plate, resulting in inaccurate measurement data. Utility Model Content

[0004] The utility model aims to solve the defects in the prior art and provides a device for detecting the compressive strength of a bellows.

[0005] The utility model is achieved through the following technical solutions:

[0006] A bellows compressive strength detection device includes a base, a support frame, a pressure rod, a pressure plate, a pressure sensor, a limit pressure cover, a limit support plate and a measuring mechanism, wherein the support frame is fixedly arranged on the upper surface of the base, the pressure rod is fixedly arranged on the top of the support frame, the pressure plate is fixedly arranged on the telescopic end of the pressure rod, the pressure sensor is fixedly arranged on the bottom of the pressure plate, the limit pressure cover is arranged on the bottom of the pressure sensor, the limit support plate is installed on the upper surface of the base, the measuring mechanism is arranged on the inner side of the support frame, and the measuring mechanism includes a guide rod, a contact seat, a roller, a parameter The reference ring, mounting seat, lifting rod, telescopic switch, lifting plate, spring, pressure ring and contact pad, the guide rod is clamped on one side of the support frame, the contact seat is fixedly arranged at one end of the guide rod, the roller is movably arranged at the bottom of the contact seat, the reference ring is sleeved on the outside of the guide rod, the mounting seat is fixedly arranged on the inside of the support frame, the lifting rod is clamped at the bottom of the mounting seat, the telescopic switch is arranged on the inside of the mounting seat, the lifting plate is fixedly arranged on the top of the lifting rod, the pressure ring is fixedly arranged on the outside of the lifting rod, the outer sleeve of the lifting rod is provided with a spring, and the bottom of the lifting rod is fixedly provided with a contact pad.

[0007] In a preferred embodiment of the present invention, the bottom of the limit pressure cover and the top of the limit support plate are provided with arc grooves for easy clamping, and both ends of the top of the limit pressure cover are provided with shielding pieces arranged obliquely downward;

[0008] The arc grooves at the bottom of the limit pressure cover and the top of the limit support plate prevent the bellows from being pressed out during the pressure application process, which affects the detection. The shielding plates at both ends of the top of the limit pressure cover effectively prevent the bellows from popping out.

[0009] In a preferred embodiment of the present invention, the spring is located between the mounting seat and the pressure ring, and the telescopic end of the telescopic switch is located at the bottom of the lifting plate;

[0010] By retracting the telescopic end of the telescopic switch, the lifting plate loses its support instantly, so that the spring-controlled contact pad pops out, thereby instantly fixing the position of the guide rod.

[0011] In a preferred embodiment of the present invention, a vertical upward limiting guide rod is provided on the top edge of the pressure plate, and the top of the limiting guide rod passes through and extends to the top outer side of the support frame;

[0012] The limiting guide rod mainly provides effective guidance for the lifting and lowering of the pressure plate to prevent the pressure plate and the limiting pressure cover at the bottom from rotating.

[0013] In a preferred embodiment of the present invention, the surface of the guide rod is provided with a scale, and the inner side of the reference ring is in contact with the outer side of the support frame;

[0014] The inner side of the reference ring fits against the outer side of the support frame, and the outer side of the contact seat contacts the surface of the bellows. When pressure is applied, the deformed bellows will squeeze the contact seat, thereby measuring the distance from the inner side of the reference ring to the support frame and obtaining the deformation amount generated when the bellows is ruptured under pressure.

[0015] In a preferred embodiment of the present invention, the bottom of the contact pad is made of rubber, and the bottom of the roller contacts the upper surface of the base.

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

[0017] The bellows compressive strength testing device can effectively limit the bellows when applying pressure to the bellows, avoiding the problem of the bellows popping out and falling off due to uneven force and the elasticity of the bellows itself during the pressure application process, and effectively measures the elastic deformation of the bellows when it is compressed to break, which is convenient for understanding the performance of the bellows. When the bellows breaks, it will produce greater elasticity, and the measuring mechanism can be quickly locked when it is suddenly accelerated by the elastic force, thereby ensuring accurate measurement results. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 This is a schematic diagram of the three-dimensional structure of the bellows compressive strength testing device of the present invention;

[0019] Figure 2 This is a schematic diagram of the main structure of the bellows compressive strength testing device of the present invention;

[0020] Figure 3 This is a schematic diagram of the measuring mechanism structure of the bellows compressive strength testing device of the present invention.

[0021] In the figure: 1. Base; 2. Support frame; 3. Pressure rod; 4. Pressure plate; 5. Pressure sensor; 6. Limit pressure cover; 7. Limit support plate; 8. Measuring mechanism; 81. Guide rod; 82. Contact seat; 83. Roller; 84. Reference ring; 85. Mounting seat; 86. Lifting rod; 87. Telescopic switch; 88. Lifting plate; 89. Spring; 810. Pressure ring; 811. Contact pad. DETAILED DESCRIPTION

[0022] The following detailed description of preferred embodiments of the present invention, combined with the accompanying drawings, will facilitate understanding of the advantages and features of the present invention by those skilled in the art, thereby more clearly defining the scope of protection of the present invention. Directional terms used in this invention, such as "up," "down," "front," "back," "left," "right," "top," and "bottom," are intended solely to refer to the directions in the accompanying drawings. Therefore, these directional terms are intended to illustrate and facilitate understanding of the present invention and are not intended to limit the present invention.

[0023] like Figure 1-3 The bellows compressive strength testing device shown in the figure includes a base 1, a support frame 2, a pressure rod 3, a pressure plate 4, a pressure sensor 5, a limit pressure cover 6, a limit support plate 7 and a measuring mechanism 8. The support frame 2 is fixedly arranged on the upper surface of the base 1, the pressure rod 3 is fixedly arranged on the top of the support frame 2, the pressure plate 4 is fixedly arranged at the telescopic end of the pressure rod 3, the pressure sensor 5 is fixedly arranged at the bottom of the pressure plate 4, the limit pressure cover 6 is arranged at the bottom of the pressure sensor 5, the limit support plate 7 is installed on the upper surface of the base 1, and the measuring mechanism 8 is arranged on the inner side of the support frame 2. The measuring mechanism 8 includes a guide rod 81, a contact seat 82, a roller 83, a reference ring 84, a mounting seat 85, and a lifting rod 86. , telescopic switch 87, lifting plate 88, spring 89, pressure ring 810 and contact pad 811, the guide rod 81 is clamped on one side of the support frame 2, the contact seat 82 is fixedly set at one end of the guide rod 81, the roller 83 is movably set at the bottom of the contact seat 82, the reference ring 84 is sleeved on the outside of the guide rod 81, the mounting seat 85 is fixedly set on the inside of the support frame 2, the lifting rod 86 is clamped at the bottom of the mounting seat 85, the telescopic switch 87 is set on the inside of the mounting seat 85, the lifting plate 88 is fixedly set on the top of the lifting rod 86, the pressure ring 810 is fixedly set on the outside of the lifting rod 86, the spring 89 is sleeved on the outside of the lifting rod 86, and the contact pad 811 is fixedly set at the bottom of the lifting rod 86.

[0024] Specifically, arc grooves are provided at the bottom of the limiting pressure cover 6 and the top of the limiting support plate 7 for easy clamping. Shielding plates are provided at both ends of the top of the limiting pressure cover 6 and tilted downward. The spring 89 is located between the mounting seat 85 and the pressure ring 810. The telescopic end of the telescopic switch 87 is located at the bottom of the lifting plate 88. A vertical upward limiting guide rod is provided at the top edge of the pressure plate 4. The top of the limiting guide rod passes through and extends to the outside of the top of the support frame 2. A scale is provided on the surface of the guide rod 81. The inner side of the reference ring 84 is in contact with the outer side of the support frame 2. The bottom material of the contact pad 811 is rubber, and the bottom of the roller 83 is in contact with the upper surface of the base 1.

[0025] In this embodiment, first, a section of the bellows is cut and placed in the arc groove at the top of the limiting support plate 7 on the upper surface of the base 1. The two ends of the bellows need to extend to the outside of the two ends of the limiting support plate 7. Leaving a certain margin can reduce the error in the compressive strength test. Then, the pressure rod 3 is controlled to press down until the bottom of the limiting pressure cover 6 at the bottom of the pressure plate 4 contacts the top of the bellows. Since there are arc grooves on the top of the limiting support plate 7 and the bottom of the limiting pressure cover 6, the initial clamping and limiting of the bellows can be achieved. Then, the contact seat 82 is moved to its outside to contact the outer surface of the bellows, and the reference ring 84 is moved to its inside to fit the outer side of the support frame 2.

[0026] Furthermore, the pressure rod 3 is controlled to extend, thereby controlling the limit pressure cover 6 at the bottom of the pressure plate 4 to continue to press down, and the shielding plates at both ends of the limit pressure cover 6 prevent the bellows from being pressed and popping out. After the bellows is compressed and deformed, its two sides are squeezed outward, thereby pushing the contact seat 82 to move outward, and the roller 83 facilitates the outward movement of the contact seat 82. The pressure value of the pressure sensor 5 will continue to increase and be recorded by the equipment. When the bellows reaches the pressure limit, it will rupture, causing the value of the pressure sensor 5 to drop instantly. The bellows generally ruptures at the pressure positions on both sides, and the rupture will cause its tube wall to pop out, thereby causing the contact seat 82 to The contact seat 82 accelerates instantaneously, affecting the measurement result. Therefore, when the pressure measured by the pressure sensor 5 decreases instantaneously, the telescopic switch 87 receives the signal and retracts quickly, resulting in a lack of support at the bottom of the lifting plate 88. The pre-compressed spring 89 pops out instantaneously to apply pressure to the pressure ring 810, pressing the contact pad 811 on the surface of the guide rod 81, locking the position of the guide rod 81. At this time, the length from the inside of the reference ring 84 to the outside of the support frame 2 is the maximum deformation of the bellows before it ruptures. Not only the compressive strength is measured, but also the maximum deformation of the bellows is measured, which is convenient for effectively understanding the overall performance of the bellows.

[0027] It should be noted that the parts not covered in the present invention are the same as the existing technology or can be implemented by using the existing technology; the various drives in the present invention can be implemented by using corresponding power structures such as cylinders, oil cylinders, electric cylinders, motors, etc. in combination with connecting rods, guide rods, etc., and are not limited to the description in the specification and the structure in the drawings.

[0028] In the description of the embodiments of the present invention, unless otherwise expressly specified or limited, the terms "installed," "connected," "connected," "set," and "provided with" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integral connections; they may refer to mechanical connections or electrical connections; they may refer to direct connections or indirect connections through an intermediate medium; and they may refer to internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

[0029] The above-described embodiments merely represent several implementation methods of the present invention. While the descriptions are relatively specific and detailed, they should not be construed as limiting the scope of the patent. It should be noted that a person skilled in the art would be able to make numerous variations and improvements without departing from the concept of the present invention, and all such variations and improvements fall within the scope of protection of the present invention.

Claims

1. A bellows compressive strength testing device, comprising a base (1), a support frame (2), a pressure rod (3), a pressure plate (4), a pressure sensor (5), a limit pressure cover (6), a limit support plate (7) and a measuring mechanism (8), characterized in that: The support frame (2) is fixedly arranged on the upper surface of the base (1), the pressure rod (3) is fixedly arranged on the top of the support frame (2), the pressure plate (4) is fixedly arranged on the telescopic end of the pressure rod (3), the pressure sensor (5) is fixedly arranged on the bottom of the pressure plate (4), the limit pressure cover (6) is arranged on the bottom of the pressure sensor (5), the limit support plate (7) is installed on the upper surface of the base (1), and the measuring mechanism (8) is arranged on the inner side of the support frame (2); The measuring mechanism (8) comprises a guide rod (81), a contact seat (82), a roller (83), a reference ring (84), a mounting seat (85), a lifting rod (86), a telescopic switch (87), a lifting plate (88), a spring (89), a pressure ring (810) and a contact pad (811), wherein the guide rod (81) is clamped on one side of the support frame (2), the contact seat (82) is fixedly arranged at one end of the guide rod (81), the roller (83) is movably arranged at the bottom of the contact seat (82), and the reference ring (811) is fixedly arranged at one end of the guide rod (81). (84) is sleeved on the outside of the guide rod (81), the mounting seat (85) is fixedly arranged on the inside of the support frame (2), the lifting rod (86) is clamped on the bottom of the mounting seat (85), the telescopic switch (87) is arranged on the inside of the mounting seat (85), a lifting plate (88) is fixedly arranged on the top of the lifting rod (86), a pressure ring (810) is fixedly arranged on the outside of the lifting rod (86), a spring (89) is sleeved on the outside of the lifting rod (86), and a contact pad (811) is fixedly arranged on the bottom of the lifting rod (86).

2. The bellows compressive strength testing device according to claim 1, characterized in that: The bottom of the position-limiting pressure cover (6) and the top of the position-limiting support plate (7) are provided with arc grooves for facilitating clamping, and shielding pieces arranged obliquely downward are provided at both ends of the top of the position-limiting pressure cover (6).

3. The bellows compressive strength testing device according to claim 1, characterized in that: The spring (89) is located between the mounting seat (85) and the pressure ring (810), and the telescopic end of the telescopic switch (87) is located at the bottom of the lifting plate (88).

4. The bellows compressive strength testing device according to claim 1, characterized in that: A vertically upward limiting guide rod is provided on the top edge of the pressure plate (4), and the top of the limiting guide rod passes through and extends to the top outer side of the support frame (2).

5. The bellows compressive strength testing device according to claim 1, characterized in that: The surface of the guide rod (81) is provided with a scale, and the inner side of the reference ring (84) is in contact with the outer side of the support frame (2).

6. The bellows compressive strength testing device according to claim 1, characterized in that: The bottom of the contact pad (811) is made of rubber, and the bottom of the roller (83) contacts the upper surface of the base (1).

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