PVC compression strength testing device

Abstract

The utility model relates to material performance detection technical field discloses a kind of PVC compression strength testing device, including rack, lifting plate, lifting drive mechanism, lifting guide mechanism and test induction mechanism;Rack is equipped with workbench and the accommodation cavity located above workbench;Lifting plate is suspended above workbench for down-pressing test PVC pipe fitting;Lifting drive mechanism is arranged in accommodation cavity for driving lifting plate to lift;Lifting guide mechanism is used to assist lifting plate to move stably;Test induction mechanism is used to collect test data;To solve the technical problem that existing compression strength testing device has complex structure, inconvenient operation.

Description

Technical Field

[0001] This utility model relates to the field of material performance testing technology, specifically to a PVC compressive strength testing device. Background Technology

[0002] PVC pipe fittings are widely used in many fields, and accurately determining their compressive strength is crucial for ensuring product quality and engineering safety. Existing compressive strength testing devices suffer from problems such as complex structure, inconvenient operation, and low testing accuracy, making it difficult to meet the demand for efficient and accurate testing of the compressive strength of PVC pipe fittings. Utility Model Content

[0003] The present invention aims to provide a PVC compressive strength testing device to solve the technical problems of existing compressive strength testing devices having complex structures and inconvenient operation.

[0004] To achieve the above objectives, this utility model adopts the following technical solution: a PVC compressive strength testing device, comprising a frame, a lifting plate, a lifting drive mechanism, a lifting guide mechanism, and a testing sensing mechanism; the frame is provided with a worktable and a receiving cavity located above the worktable; the lifting plate is suspended above the worktable for pressing down to test PVC pipe fittings; the lifting drive mechanism is located in the receiving cavity for driving the lifting plate to rise and fall; the lifting guide mechanism is used to assist the lifting plate in stable movement; and the testing sensing mechanism is used to collect test data.

[0005] The principle and advantages of this solution are as follows: In practical applications, the lifting drive mechanism drives the lifting plate to move stably downward with the assistance of the lifting guide mechanism, performing a pressure test on the PVC pipe fittings on the workbench. The testing sensing mechanism collects data such as pressure and displacement in real time during the test and transmits it to the signal processing module for processing to evaluate the compressive strength of the PVC pipe fittings.

[0006] The overall structure of the device is clearly laid out, with each mechanism having a distinct function. Compared to existing devices, it reduces unnecessary structural complexity, making the device more concise and compact. The various mechanisms work together smoothly, and the operation process is simple and easy to understand, allowing operators to quickly learn and perform testing. The testing sensing mechanism can accurately collect pressure and displacement data, providing reliable data support for accurately assessing the compressive strength of PVC pipe fittings.

[0007] Preferably, as an improvement, the lifting drive mechanism includes a lead screw, a lead screw nut, and a drive assembly. The lead screw is vertically arranged and extends out of the accommodating cavity. The lower end of the lead screw is fixedly connected to the lower surface of the lifting plate. The lead screw nut is fitted onto the lead screw, and there is a threaded engagement between the lead screw and the lead screw nut. The lead screw nut is pivotally connected in the accommodating cavity, and the drive assembly is used to drive the lead screw nut to rotate.

[0008] The beneficial effects of this improvement are as follows: The structure employs a lead screw, lead screw nut, and drive assembly. The drive assembly rotates the lead screw nut, and the threaded engagement between the lead screw and nut enables the lifting and lowering of the lead screw, thereby moving the lifting plate. This structure provides smooth transmission, high precision, and accurate control over the downward pressure speed and displacement of the lifting plate, meeting the requirements for PVC pipe compressive strength testing.

[0009] Preferably, as an improvement, the drive assembly further includes a combination structure of a rotary motor, a drive gear, a transmission belt, and a transmission gear; the drive gear is fixedly sleeved on the output shaft of the rotary motor; the transmission gear is fixed on the lead screw nut; the transmission belt is wound around the drive gear and the transmission gear, and meshes with the drive gear and the transmission gear respectively through the toothed structure on the transmission belt.

[0010] The beneficial effects of this improvement are as follows: the drive structure, consisting of a rotary motor, a drive gear, a transmission belt, and transmission gears, can effectively transmit the power of the rotary motor to the lead screw and nut. The meshing transmission method of the transmission belt and gears features accurate transmission ratio and high transmission efficiency, ensuring the stability and reliability of power transmission, enabling the lead screw and nut to rotate smoothly, thereby driving the lead screw and lifting plate to move accurately.

[0011] Preferably, as an improvement, the lifting guide mechanism includes a guide rod and a sleeve. There are two guide rods, both vertically arranged and located on both sides of the lead screw. The guide rods extend outward from the accommodating cavity, and the lower end of the guide rods is fixedly connected to the lifting plate. The sleeve is movably sleeved on the guide rod and is fixedly installed in the accommodating cavity.

[0012] The beneficial effects of this improvement are as follows: the two vertically positioned guide rods on both sides of the lead screw, in conjunction with the rod sleeves, provide precise guidance for the movement of the lifting plate. During the lifting process, the restrictive effect of the guide rods and rod sleeves ensures that the lifting plate can only move stably in a vertical direction, preventing deviation or swaying during movement and improving the accuracy and stability of the test.

[0013] Preferably, as an improvement, the accommodating cavity is a rectangular shell, and support rods are fixedly provided at the four bottom corners of the accommodating cavity, with the lower ends of the support rods fixedly connected to the worktable.

[0014] The beneficial effects of this improvement are: the accommodating cavity is a rectangular shell, which is fixedly connected to the worktable by the support rods at the four corners of the bottom. This structure allows the accommodating cavity to be stably installed above the worktable, providing a stable installation space for components such as the lifting drive mechanism and the test sensing mechanism, and ensuring the structural stability of the entire device.

[0015] Preferably, as an improvement, the test sensing mechanism includes a pressure sensor, a displacement sensor, and a signal processing module. The pressure sensor is installed on the lower surface of the lifting plate, the displacement sensor is set on the lead screw, guide rod, or lifting plate, and the signal processing module is set in the accommodating cavity to receive and process the electrical signals transmitted by the pressure sensor and the displacement sensor.

[0016] The beneficial effects of this improvement are: the pressure sensor, installed on the lower surface of the lifting plate, can directly sense the pressure borne by the PVC pipe fitting; the displacement sensor, set on the lead screw, guide rod, or lifting plate, can monitor the downward displacement of the lifting plate in real time. The signal processing module processes the electrical signals transmitted from the sensors, providing accurate basic data for subsequent data analysis and result evaluation, thus improving the accuracy and reliability of the test.

[0017] Preferably, as an improvement, the surface of the accommodating cavity is further provided with an operation panel, which is connected to the signal processing module and is used to display the processed pressure and displacement data in digital or graphical form.

[0018] The beneficial effects of this improvement are: the operation panel on the surface of the accommodating cavity is connected to the signal processing module, which can display the processed pressure and displacement data in an intuitive digital or graphical form, making it convenient for operators to observe the test process and results in real time. At the same time, it can also store data for subsequent query and analysis, improving the convenience of testing and the effectiveness of data management. Attached Figure Description

[0019] Figure 1 This is a structural schematic diagram of an embodiment of the present utility model.

[0020] Figure 2 This is a vertical cross-sectional view of an embodiment of the present utility model.

[0021] Figure 3 This is a horizontal cross-sectional view of an embodiment of the present invention.

[0022] The reference numerals in the accompanying drawings include: worktable 1, receiving cavity 2, lead screw 3, lead screw nut 4, lifting plate 5, drive gear 6, transmission belt 7, transmission gear 8, guide rod 9, rod sleeve 10, support rod 11, operation panel 12, and drive assembly 13. Detailed Implementation

[0023] The following detailed description illustrates the specific implementation method:

[0024] Example

[0025] The basics are as follows: Figure 1 As shown, a PVC compressive strength testing device includes a frame, a lifting plate 5, a lifting drive mechanism, a lifting guide mechanism, and a testing sensing mechanism.

[0026] The frame is equipped with a worktable 1, and a receiving cavity 2 is provided above the worktable 1. A lifting drive mechanism is installed in the receiving cavity 2, and the transmission end of the lifting drive mechanism is connected to a lifting plate 5, so that the lifting plate 5 is suspended above the worktable 1. The lower surface of the lifting plate 5 is used to contact and press down on the PVC pipe fittings on the worktable 1 for testing.

[0027] The lifting guide mechanism is used to assist in the suspension connection of the lifting plate 5, making the movement of the lifting plate 5 more stable.

[0028] As attached Figure 2 and attached Figure 3 As shown, the lifting drive mechanism includes a lead screw 3, a lead screw nut 4, and a drive assembly 13. The lead screw 3 is vertically positioned and extends outside the receiving cavity 2, with its lower end fixedly connected to the lower surface of the lifting plate 5. The lead screw nut 4 is fitted onto the lead screw 3, and the lead screw 3 and lead screw nut 4 are threaded together. The lead screw nut 4 is pivotally connected within the receiving cavity 2. The drive assembly 13 is used to drive the lead screw nut 4 to rotate.

[0029] When the drive assembly 13 drives the lead screw nut 4 to rotate, the lead screw 3, under the threaded engagement with the lead screw nut 4 and the reverse movement restriction that the lead screw 3 can only move up and down, realizes the lifting of the lead screw 3, that is, the lifting plate 5 is driven to move up and down by the lead screw 3.

[0030] The drive component can be a rotary hydraulic cylinder or a hollow rotary platform. When a rotary hydraulic cylinder is used, the output shaft of the rotary hydraulic cylinder is fixedly connected to the lead screw nut 4. In this way, the rotary hydraulic cylinder directly drives the lead screw nut 4 to rotate. However, this structure requires the output shaft of the rotary hydraulic cylinder to be coaxial with the lead screw 3.

[0031] The drive assembly 13 may also include a rotary motor, a drive gear 6, a transmission belt 7, and a transmission gear 8. The drive gear 6 is fixedly mounted on the output shaft of the rotary motor. The transmission gear 8 is fixed on the lead screw nut 4. The transmission belt 7 is wound around the drive gear 6 and the transmission gear 8. As is known from common knowledge, the toothed structure on the transmission belt 7 meshes with the drive gear 6 and the transmission gear 8 respectively, thereby realizing the transmission of force. Thus, in use, when the rotary motor is started, the output shaft of the rotary motor rotates, which drives the drive gear 6 to rotate. At this time, the drive gear 6 transmits power to the transmission gear 8 through the transmission belt 7. The transmission gear 8 links the lead screw nut 4, thereby driving the lead screw nut 4 to rotate. In the above structure, the power of the rotary motor is transmitted through the cooperation of the drive gear 6, the transmission belt 7, and the transmission gear 8.

[0032] The lifting guide mechanism includes guide rods 9 and rod sleeves 10. There are two guide rods 9, both vertically arranged and located on both sides of the lead screw 3. The guide rods 9 also extend outward from the receiving cavity 2. The lower end of the guide rod 9 is fixedly connected to the lifting plate 5. The rod sleeve 10 is movably sleeved on the guide rod 9 and fixedly installed inside the receiving cavity 2. A mounting bracket is provided inside the receiving cavity for fixing the rotary motor.

[0033] When the lead screw nut 4 is linked with the lead screw 3, the lead screw 3 can only move vertically due to the constraints of the guide rod 9 and the sleeve. The guide rod 9 plays a guiding role, improving the stability of the movement of the lead screw 3.

[0034] The accommodating cavity 2 is a rectangular shell. Support rods 11 are fixedly installed at the four corners of the bottom of the accommodating cavity 2. The lower end of the support rods 11 is fixedly connected to the workbench 1, so that the accommodating cavity 2 is fixedly installed above the workbench 1 by the support rods 11.

[0035] The testing sensing mechanism includes a pressure sensor, a displacement sensor, and a signal processing module. The pressure sensor is installed on the lower surface of the lifting plate 5, which allows it to directly contact the PVC pipe fitting on the workbench 1. When the lifting plate 5 presses down to perform a pressure test on the PVC pipe fitting, the pressure sensor can accurately sense the pressure exerted on the pipe fitting and convert it into an electrical signal. The displacement sensor can be installed on the lead screw 3, guide rod 9, or lifting plate 5. Its function is to monitor the downward displacement of the lifting plate 5 in real time, i.e., the distance the lead screw 3 drives the lifting plate 5 to descend, and similarly convert the displacement information into an electrical signal output. The signal processing module is located in a suitable position within the accommodating cavity 2. It receives the electrical signals from the pressure sensor and displacement sensor, and performs amplification, filtering, analog-to-digital conversion, and other processing on these signals for subsequent analysis and recording.

[0036] The pressure sensor can be a diffused silicon pressure sensor, based on the piezoresistive effect. The pressure of the measured medium acts directly on the sensor's diaphragm, causing a slight displacement of the diaphragm and thus changing its resistance. This resistance change is converted into a voltage signal using a Wheatstone bridge circuit. For example, the Honeywell PSC series is mounted on the lower surface of the lifting plate 5, directly contacting the PVC pipe fitting to ensure accurate measurement of the pressure applied to the fitting.

[0037] The displacement sensor can be a magnetostrictive displacement sensor, which utilizes the magnetostrictive principle to measure position by generating a strain pulse signal through the intersection of two different magnetic fields. The measuring element is a waveguide, and the sensing element inside the waveguide is made of a special magnetostrictive material. For example, the MTS Temposonics series is mounted on the guide rod 9, and the displacement of the lifting plate 5 is indirectly measured by measuring the displacement of the guide rod 9. This mounting method can provide a stable measurement environment and reduce mechanical transmission errors.

[0038] The surface of the accommodating cavity 2 is also equipped with an operation panel 12, which is connected to the signal processing module. It can display the processed pressure and displacement data in an intuitive numerical or graphical form, making it convenient for operators to observe the test process and results in real time. It can also store the data for subsequent query and analysis.

[0039] During the test, when the drive assembly 13 rotates the lead screw nut 4, the lead screw 3 moves downward under the constraint of the threaded engagement and guide mechanism. The lifting plate 5 then descends and applies pressure to the PVC pipe fitting on the workbench 1. At this time, the pressure sensor detects the pressure change in real time, and the displacement sensor accurately measures the downward displacement of the lifting plate 5. The two sensors convert the detected physical quantities into electrical signals and transmit them to the signal processing module. After processing the electrical signals, the signal processing module transmits them to the data recording and display unit, allowing the operator to monitor the pressure and displacement during the test in real time. When the PVC pipe fitting reaches its compressive strength limit and ruptures, the pressure sensor detects a sudden change in pressure. The system can determine whether the pipe fitting has ruptured based on preset judgment criteria (such as the pressure drop amplitude) and record the pressure and displacement values ​​at this time. The displacement value indicates the percentage of compression of the PVC under external force, which serves as the basis for evaluating the compressive strength of the PVC pipe fitting.

[0040] The above descriptions are merely embodiments of this utility model. Commonly known technical solutions and / or characteristics are not described in detail here. It should be noted that those skilled in the art can make various modifications and improvements without departing from the technical solution of this utility model. These modifications and improvements should also be considered within the scope of protection of this utility model, and will not affect the effectiveness of the implementation of this utility model or the practicality of the patent. The scope of protection claimed in this application should be determined by the content of its claims, and the specific embodiments described in the specification can be used to interpret the content of the claims.

Claims

1. A PVC compressive strength testing device, characterized in that: It includes a frame, a lifting plate, a lifting drive mechanism, a lifting guide mechanism, and a test sensing mechanism; the frame is equipped with a worktable and a receiving cavity located above the worktable; the lifting plate is suspended above the worktable for pressing down on PVC pipe fittings for testing; the lifting drive mechanism is located in the receiving cavity for driving the lifting plate to rise and fall; the lifting guide mechanism is used to assist the lifting plate in stable movement; and the test sensing mechanism is used to collect test data.

2. The PVC compressive strength testing device according to claim 1, characterized in that: The lifting drive mechanism includes a lead screw, a lead screw nut, and a drive assembly. The lead screw is vertically positioned and extends out of the accommodating cavity. The lower end of the lead screw is fixedly connected to the lower surface of the lifting plate. The lead screw nut is fitted onto the lead screw, and there is a threaded connection between the lead screw and the lead screw nut. The lead screw nut is pivotally connected inside the accommodating cavity. The drive assembly is used to drive the lead screw nut to rotate.

3. The PVC compressive strength testing device according to claim 2, characterized in that: The drive assembly also includes a combination structure of a rotary motor, a drive gear, a transmission belt, and a transmission gear; the drive gear is fixedly mounted on the output shaft of the rotary motor; the transmission gear is fixed on the lead screw nut; the transmission belt is wound around the drive gear and the transmission gear, and meshes with the drive gear and the transmission gear respectively through the toothed structure on the transmission belt.

4. The PVC compressive strength testing device according to claim 3, characterized in that: The lifting guide mechanism includes a guide rod and a rod sleeve. There are two guide rods, both of which are vertically arranged and located on both sides of the lead screw. The guide rods extend outward from the accommodating cavity, and the lower end of the guide rod is fixedly connected to the lifting plate. The rod sleeve is movably sleeved on the guide rod and is fixedly installed in the accommodating cavity.

5. The PVC compressive strength testing device according to claim 4, characterized in that: The accommodating cavity is a rectangular shell, and support rods are fixedly installed at the four bottom corners of the accommodating cavity, with the lower ends of the support rods fixedly connected to the worktable.

6. The PVC compressive strength testing device according to claim 5, characterized in that: The test sensing mechanism includes a pressure sensor, a displacement sensor, and a signal processing module. The pressure sensor is installed on the lower surface of the lifting plate, the displacement sensor is set on the lead screw, guide rod, or lifting plate, and the signal processing module is set in the accommodating cavity to receive and process the electrical signals transmitted by the pressure sensor and the displacement sensor.

7. The PVC compressive strength testing device according to claim 6, characterized in that: The surface of the accommodating cavity is also provided with an operation panel, which is connected to the signal processing module and is used to display the processed pressure and displacement data in digital or graphical form.

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