Pressure testing machine

Abstract

The utility model discloses a pressure testing machine, which relates to the technical field of pressure testing equipment, and comprises a mounting rack, a first mounting hole is formed in a bottom plate of the mounting rack; the driving assembly is fixed on the top plate of the mounting frame; the lower pressing plate is connected with the power output end of the driving assembly, and a second mounting hole is formed in the middle of the lower pressing plate; the light source positioning piece is fixed in the second mounting hole, the light source positioning piece emits light rays, a positioning aperture is projected on the bottom plate by taking the first mounting hole as a center, and a to-be-tested sample is placed in the positioning aperture; the detection assembly comprises a measuring piece and a lifting unit, the measuring piece is arranged in the first mounting hole, the lifting unit is connected with the measuring piece, the lifting unit is used for controlling the measuring piece to ascend and descend in the first mounting hole, and the measuring piece is used for measuring the residual deformation of the to-be-tested sample after the test.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure test equipment technical field especially relates to a pressure testing machine. BACKGROUND

[0002] As an important part of urban infrastructure, the quality and performance of the well lid are crucial to detect. Microcomputer electro-hydraulic servo well lid pressure testing machine plays a key role in well lid detection, but in actual operation, the sample placement relies on simple scale ruler for auxiliary positioning, and the staff places it manually by experience, without precise positioning auxiliary means, so it is difficult to achieve rapid and accurate placement, affecting the test efficiency and accuracy. Precise placement of well lid sample is essential to obtain reliable test data, but the existing placement method needs to be improved in terms of accuracy and efficiency. At the same time, the operator needs to spend a lot of time adjusting the position of the well lid sample during the placement process, especially for larger or heavier well lids, the operation difficulty increases, and the overall test efficiency decreases. SUMMARY

[0003] The technical problem to be solved by the utility model lies in providing a pressure testing machine capable of accurately positioning well lid samples.

[0004] In order to solve the above technical problems, the utility model provides a pressure testing machine, which comprises: a mounting frame, a first mounting hole is arranged on the bottom plate of the mounting frame; a driving assembly fixed to the top plate of the mounting frame; a lower pressing plate connected with the power output end of the driving assembly, a second mounting hole is arranged in the middle of the lower pressing plate; a light source positioning piece fixed in the second mounting hole, the light source positioning piece emits light, a positioning light ring is projected on the bottom plate with the first mounting hole as the center, and the test sample is placed in the positioning light ring; a detection assembly comprising a measuring piece and a lifting unit, the measuring piece is arranged in the first mounting hole, the lifting unit is connected with the measuring piece, the lifting unit is used for controlling the lifting of the measuring piece in the first mounting hole, and the measuring piece is used for measuring the residual deformation of the test sample after the test.

[0005] As an improvement of the above scheme, the pressure testing machine further comprises a control cabinet connected with the driving assembly and the light source positioning piece respectively.

[0006] As an improvement of the above scheme, the light source positioning piece comprises: a main shell fixed in the first mounting hole; an emission part fixed to one end of the main shell close to the bottom plate and used for emitting a light beam; a communication unit used for connecting the control cabinet and the emission part; and a light ring adjusting unit integrated in the emission part, the light ring adjusting unit is connected with the control cabinet through the communication unit, and the control cabinet sends instructions to control the divergence angle and spot shape of the light beam emitted by the emission part.

[0007] As the improvement of the above scheme, the light source positioning member further comprises an adjusting ring, which is rotatably sleeved on the outer wall of the emitting part, and is used for manually adjusting the divergence angle and the spot shape of the light beam emitted by the emitting part.

[0008] As the improvement of the above scheme, the driving assembly comprises a hydraulic cylinder and an upper mounting plate, the hydraulic cylinder is connected with the top plate through the upper mounting plate, and the power output end of the hydraulic cylinder is electrically connected with the lower pressing plate.

[0009] As the improvement of the above scheme, the driving assembly further comprises a load sensor, which is fixed to one side of the hydraulic cylinder close to the lower pressing plate, and is electrically connected with the control cabinet.

[0010] As the improvement of the above scheme, a speed measuring sensor is fixed on the support beam of the mounting frame, which is used for detecting the instantaneous speed of the lower pressing plate during work, and is connected with the control cabinet.

[0011] As the improvement of the above scheme, the lifting unit comprises a lifting machine fixed in the first mounting hole, and a measuring member fixed on the upper end of the lifting machine; and a driving hand wheel is threadedly connected with the lifting machine, and the lifting of the lifting machine is adjusted through the driving hand wheel.

[0012] As the improvement of the above scheme, the measuring member is a grating micrometer.

[0013] As the improvement of the above scheme, the pressure testing machine further comprises a mounting base, and the mounting frame is fixed on the upper end of the mounting base.

[0014] The beneficial effects of the present application are as follows:

[0015] The pressure testing machine in the present application can project a positioning light ring on the bottom plate through the light source positioning member in the second mounting hole, and the work personnel can place the well lid pattern quickly and accurately by aligning the outer contour of the well lid pattern with the positioning light ring, so that the stress of the well lid is uniform during the test, and the accuracy of the test result is improved. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 Figure 1 FIG. 1 is a structural schematic view of a pressure testing machine in the present embodiment;

[0017] Figure 2 FIG. 4 is a top view of the lower pressing plate of the pressure testing machine in the present embodiment;

[0018] Figure 3 FIG. 6 is a top view of the bottom plate of the pressure testing machine in the present embodiment;

[0019] Figure 4 is the structural schematic diagram of the light source positioning member in the embodiment.

[0020] The reference signs are explained as follows: 100, mounting rack; 110, bottom plate; 111, first mounting hole; 120, top plate; 130, support beam; 131, fixing bolt; 210, hydraulic cylinder; 211, oil delivery pipe; 220, upper mounting plate; 230, load sensor; 300, lower pressing plate; 310, second mounting hole; 400, light source positioning member; 410, emitting part; 420, main shell; 430, communication unit; 440, adjusting ring; 450, positioning light ring; 460, fixing ring; 510, measuring member; 520, driving hand wheel; 600, control cabinet; 610, display screen; 620, control button; 700, speed measuring sensor; 800, base. DETAILED DESCRIPTION

[0021] In order to make the purpose, technical scheme and advantages of the utility model more clear, the utility model will be described further in detail below in combination with the drawings.

[0022] Referring to Figures 1-3 , Figure 1 is the structural schematic diagram of the pressure testing machine in the embodiment; Figure 2 is the top view of the lower pressing plate of the pressure testing machine in the embodiment; Figure 3It is a top view of a base plate of a pressure testing machine in the embodiment; as shown in the figure, in the embodiment, the pressure testing machine is used for detecting the compression resistance of a manhole cover sample, which comprises a mounting frame 100, a first mounting hole 111 is arranged on a bottom plate 110 of the mounting frame 100; a driving assembly is fixed to a top plate 120 of the mounting frame 100; a lower pressing plate 300 is connected with a power output end of the driving assembly, a second mounting hole 310 is arranged in the middle of the lower pressing plate 300; a light source positioning piece 400 is fixed in the second mounting hole 310, the light source positioning piece 400 emits light, a positioning light circle 450 is projected on the bottom plate 110 with the first mounting hole 111 as the center, and a sample to be tested is placed in the positioning light circle 450; a detection assembly comprises a measuring piece 510 and a lifting unit, the measuring piece 510 is arranged in the first mounting hole 111, the lifting unit is connected with the measuring piece 510, the lifting unit is used for controlling the measuring piece 510 to ascend and descend in the first mounting hole 111, and the measuring piece 510 is used for measuring the residual deformation of the sample to be tested after the test. By arranging the light source positioning piece 400 in the second mounting hole 310, the positioning light circle 450 is projected on the bottom plate 110 by the light source positioning piece 400, the worker only needs to align the outer contour of the manhole cover sample with the positioning light circle 450, so that the manhole cover sample can be quickly and accurately placed, the stress of the manhole cover is uniform during the test, and the accuracy of the test result is improved.

[0023] Preferably, the light source positioning piece 400 is located directly above the measuring piece 510, so as to ensure that the center of the projected positioning light circle 450 coincides with the center of the measuring piece 510.

[0024] Referring to Figure 1 , further, in the embodiment, the pressure testing machine further comprises a control cabinet 600, and the control cabinet 600 is connected with the driving assembly and the light source positioning piece 400 respectively. A display screen 610 is arranged on the control cabinet 600, which is used for displaying the working data and detection data of the pressure testing machine in real time, and a control button 620 is arranged on the control cabinet 600, which is used for controlling the working of the pressure testing machine.

[0025] Referring to Figure 1 , further, in the embodiment, the pressure testing machine further comprises a mounting base 800, and the mounting frame 100 is fixed to the upper end of the mounting base 800, and the mounting base 800 is arranged to improve the bearing capacity of the bottom plate 110 of the mounting frame 100.

[0026] Referring to Figure 1 , further, in the embodiment, the mounting frame 100 comprises a bottom plate 110, a support beam 130 and a top plate 120, and the two ends of the support beam 130 are connected with the top plate 120 and the bottom plate 110 through fixing bolts 131 respectively.

[0027] Referring to Figure 3 and Figure 4 , Figure 4 is a structural schematic diagram of the light source positioning member 400 in the embodiment;

[0028] Further, in the embodiment, the light source positioning member 400 is a laser emitter, which comprises a main housing 420 fixedly installed in the first mounting hole 111 through a fixing ring 460, an emitting part 410 fixed to one end of the main housing 420 close to the bottom plate 110 for emitting a light beam, a communication unit 430 for connecting the control cabinet 600 and the emitting part 410, and an aperture adjusting unit integrated in the emitting part 410, which is connected with the control cabinet 600 through the communication unit 430 and controls the divergence angle and spot shape of the light beam emitted by the emitting part 410 through the control cabinet 600. The light source positioning member 400 further comprises an adjusting ring 440 rotatably sleeved on the outer wall of the emitting part 410, which is used for manually adjusting the divergence angle and spot shape of the light beam emitted by the emitting part 410. In use, the size of the positioning aperture 450 emitted by the laser positioning device is first coarsely adjusted through the adjusting ring 440, and then the laser positioning device is installed into the second mounting hole 310, connected with the control cabinet 600 through the communication unit 430, and the size of the positioning aperture 450 is finely adjusted through the aperture adjusting unit of the control cabinet 600. In the specific implementation process of the embodiment, the diameter of the manhole cover sample is 500 mm, the control cabinet 600 sends a command to the aperture adjusting unit through the communication unit 430 to make the emitting part 410 project a 500 mm positioning aperture 450 on the bottom plate 110, and the operator can complete positioning by fitting the outer contour of the manhole cover sample with the positioning aperture 450.

[0029] Preferably, the light source positioning member 400 uses a high-precision laser diode as a light source, and the output power thereof is adjusted according to actual needs, so as to ensure sufficient brightness and clarity of the positioning aperture 450 on the bottom plate 110 and avoid causing harm to the eyes of the operator. The light source positioning member 400 emits red laser with a wavelength of 630 nm to 680 nm, and the operator can clearly observe the projected positioning aperture 450.

[0030] Preferably, the light source positioning member 400 further comprises a voltage stabilizer connected with the power supply system of the testing machine. In other embodiments, the light source positioning member 400 can further be provided with an independent battery in the main body, which is connected with the voltage stabilizer, so as to ensure that the laser positioning device can normally operate under various working conditions and is not affected by power fluctuations.

[0031] Preferably, the communication unit 430 is connected with the control cabinet 600 in a wired manner, specifically, in an RS-485 bus or an Ethernet line, to ensure stable communication; in other embodiments, the communication unit 430 can also be connected with the control cabinet 600 in a wireless manner, specifically, using Bluetooth or Wi-Fi.

[0032] Further, in the embodiment, the driving assembly comprises a hydraulic cylinder 210 and an upper mounting plate 220, the hydraulic cylinder 210 is connected with the top plate 120 through the upper mounting plate 220, and a power output end of the hydraulic cylinder 210 is connected with the lower pressing plate 300.

[0033] Preferably, the hydraulic cylinder 210 is connected with an oil delivery pipe 211, and the hydraulic cylinder 210 is connected with an oil pump through the oil delivery pipe 211.

[0034] Preferably, the driving assembly further comprises a load sensor 230, the load sensor 230 is fixed to one side of the hydraulic cylinder 210 close to the lower pressing plate 300, and the load sensor 230 is electrically connected with the control cabinet 600. The load sensor 230 is used to detect the pressing force of the hydraulic cylinder 210 each time, and the pressing force is displayed on the display screen 610, so that the staff can master the pressing load of the hydraulic cylinder 210 in real time, and the accuracy of the test is improved.

[0035] Referring to Figure 1 Further, in the embodiment, a speed sensor 700 is fixed to the support beam 130 of the mounting frame 100, the speed sensor 700 is used to detect the instantaneous speed of the lower pressing plate 300 during operation, and the speed sensor 700 is connected with the control cabinet 600. The speed sensor 700 is used to detect the pressing speed of the lower pressing plate 300, and the pressing speed is displayed on the display screen 610, so that the staff can ensure that the pressing speed of the lower pressing plate is within the same value range during testing of multiple manhole cover samples, and the uniqueness of the test is ensured.

[0036] Preferably, the speed sensor 700 is an optical sensor.

[0037] Referring to Figure 1 Further, in the embodiment, the lifting unit comprises: a lifting machine fixed in the first mounting hole 111, and the measuring member 510 is fixed to the upper end of the lifting machine; and a driving hand wheel 520 threadedly connected with the lifting machine, and the lifting machine is adjusted in lifting and lowering through the driving hand wheel 520. The lifting machine is a worm gear screw rod lifting machine, a manual screw lifting machine, or a ball screw lifting machine.

[0038] Preferably, the measuring member 510 is a grating micrometer, which is located at the geometric center of the manhole cover sample, and is electrically connected with the control cabinet 600; the data detected by the grating micrometer is displayed on the display screen 610 of the control cabinet 600.

[0039] Further, in the embodiment, the transverse section shape and size of the lower pressing plate 300 are the same as those of the manhole cover sample to be measured; the lower pressing plate 300 is made of quenched carbon steel, and has good durability and pressure resistance.

[0040] The embodiment provides a test method of a pressure testing machine in the second aspect, including the following steps.

[0041] S1: Turn on the light source positioning member 400 through the control cabinet 600, so that the light source positioning member 400 projects a positioning light ring 450 on the bottom plate 110.

[0042] S2: Adjust the size of the positioning light ring 450 through the control cabinet 600, so that the size of the positioning light ring 450 is the same as that of the manhole cover to be measured.

[0043] S3: Carry the manhole cover sample to the bottom plate 110, so that the outer contour of the manhole cover sample is attached to the positioning light ring 450, and positioning is completed.

[0044] S4: Adjust the grating micrometer to abut against the center of the manhole cover sample through the driving hand wheel 520, measure the distance from the manhole cover to the horizontal plane, and record the initial value; then adjust the grating micrometer to descend through the driving hand wheel 520.

[0045] S5: According to the test requirement, drive the hydraulic cylinder 210 to drive the lower pressing plate 300 to apply a load to the manhole cover sample at a specified rate until a specified test load value is reached, and keep for a period of time.

[0046] Specifically, the specified rate is 1 KN / S-5 KN / S, and the keeping time is 25 S-30 S.

[0047] S6: Gradually reduce the pressing pressure of the hydraulic cylinder 210 until complete unloading.

[0048] S7: Repeat S5 and S6 at least three times to simulate the stress condition of the manhole cover in actual use.

[0049] S8: After unloading the pressure, wait for 25 S-35 S, adjust the grating micrometer to abut against the center of the manhole cover sample through the driving hand wheel 520, measure the distance from the manhole cover to the horizontal plane, and record the final deformation value.

[0050] S9: According to the residual deformation amount equal to the final deformation value minus the initial value, the residual deformation amount of the manhole cover sample is obtained, and the detection is completed.

[0051] The manhole cover test sample is placed in the light circle, and the light source positioning piece can accurately indicate the placement position of the manhole cover test sample, so that the stress of the manhole cover test sample is uniform during the test process, and the accuracy of the test result is improved.

[0052] The above is the preferred embodiment of the utility model, and it should be pointed out that, for ordinary skilled persons in the art, without departing from the principle of the utility model, a number of improvements and refinements can be made, and these improvements and refinements are also considered to be within the protection scope of the utility model.

Claims

1. A compression testing machine characterized by, The pressure testing machine comprises: a mounting frame, a bottom plate of which is provided with a first mounting hole; a driving assembly fixed to a top plate of the mounting frame; a lower pressing plate connected to a power output end of the driving assembly, a middle part of the lower pressing plate being provided with a second mounting hole; a light source positioning member fixed in the second mounting hole, the light source positioning member emitting light rays to project a positioning light circle on the bottom plate with the first mounting hole as the center, a sample to be tested being placed in the positioning light circle; a detection assembly comprising a measuring member and a lifting unit, the measuring member being arranged in the first mounting hole, the lifting unit being connected to the measuring member, the lifting unit being used to control the measuring member to ascend and descend in the first mounting hole, the measuring member being used to measure a residual deformation of the sample to be tested after testing.

2. The compression testing machine of claim 1, wherein, The pressure testing machine further comprises a control cabinet connected to the driving assembly and the light source positioning member respectively.

3. The compression testing machine of claim 2, wherein, The light source positioning member comprises: a main housing fixed in the first mounting hole; an emitting part fixed to one end of the main housing close to the bottom plate and used to emit light beams; a communication unit used to connect the control cabinet and the emitting part; a light circle adjusting unit integrated in the emitting part, the light circle adjusting unit being connected to the control cabinet through the communication unit and being used to control the emitting part to emit light beams with a divergence angle and a spot shape through an instruction sent by the control cabinet.

4. The compression testing machine of claim 3, wherein, The light source positioning member further comprises an adjusting ring rotatably sleeved on an outer wall of the emitting part, the adjusting ring being used to manually adjust the divergence angle and the spot shape of the light beams emitted by the emitting part.

5. The compression testing machine of claim 2, wherein, The driving assembly comprises a hydraulic cylinder and an upper mounting plate, the hydraulic cylinder being connected to the top plate through the upper mounting plate, a power output end of the hydraulic cylinder being connected to the lower pressing plate.

6. The compression testing machine of claim 5, wherein, The driving assembly further comprises a load sensor fixed to one side of the hydraulic cylinder close to the lower pressing plate, the load sensor being electrically connected to the control cabinet.

7. The compression testing machine of claim 2, wherein, A speed sensor is fixed to a support beam of the mounting frame, the speed sensor being used to detect an instantaneous speed of the lower pressing plate when the lower pressing plate is working, the speed sensor being electrically connected to the control cabinet.

8. The compression testing machine of claim 1, wherein, The lifting unit comprises: an elevator fixed in the first mounting hole, the measuring member being fixed to an upper end of the elevator; a driving hand wheel threadedly connected to the elevator, the driving hand wheel being used to adjust the elevator to ascend and descend.

9. The compression testing machine of claim 1, wherein, The measuring member is a grating micrometer.

10. The compression testing machine of claim 1, wherein, The pressure testing machine further comprises a mounting base, the mounting frame being fixed to an upper end of the mounting base.

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