Counter-force frame control device for verification of load box

Abstract

The utility model relates to the field of load box calibration reaction frame devices, in particular to a reaction frame control device for load box calibration, which is characterized in that an oil path distributor (3) is arranged in front of an oil inlet of an auxiliary hydraulic cylinder (1), the oil path distributor (3) is connected with an oil pump (7) for the auxiliary hydraulic cylinder, the oil pump (7) for the auxiliary hydraulic cylinder is connected with an oil tank (8), and the oil tank (8) is connected with an overflow valve (5). The overflow valve (5) is connected with the reversing valve (4) and then connected with the oil return path distributor (2), and the reversing valve (4) is also connected with the oil tank (8).

Description

Technical Field

[0001] The utility model relates to the field of reaction frame devices for load cell calibration, and in particular to a reaction frame control device for load cell calibration. Background Art

[0002] At present, the reaction frame devices for load cell calibration on the market are all composed of an upper pressure plate, a lower pressure plate, a transition plate, a base, an auxiliary hydraulic cylinder and a control system. The control system only transmits the force value and pressure value to the computer through RS485, and the data is calculated and analyzed by software on the computer. The lifting of the transition plate is controlled by the operation of the hydraulic cylinder. The auxiliary hydraulic cylinders are connected in series or parallel, and only lift the transition plate to complete the return of the load cell piston. In this way, when the load cell piston is opened, due to the different starting pressures of each jack, the upper and lower plates are deformed, and the auxiliary hydraulic cylinders cannot run synchronously, resulting in non-horizontal lifting of the transition, etc.

[0003] At present, the reaction frame devices for load cell calibration on the market are all composed of an integral oil cylinder and an integral force measuring instrument. The structure is huge, and the force measuring instrument is fixed on the upper frame, with low safety factor, high cost and great manufacturing difficulty; at the same time, when calibrating, due to the uneven starting pressure of the load cell jack, the upper and lower plates of the load cell are deformed, etc. Content of the Utility Model

[0004] Purpose of the utility model: To provide a reaction frame control device for load cell calibration with better effects. The specific purpose can be seen in the multiple substantial technical effects in the specific implementation part.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] Solution 1:

[0007] A pressure equalizing device for a reaction frame for load cell calibration, characterized in that

[0008] The reaction frame device of the pressure equalizing device for the reaction frame consists of an upper pressure plate, the upper pressure plate is connected to the base 17 through the column 15, a track 20 is arranged on the base 17, a trolley can move on the track 20, and a transition plate 18 is arranged above the trolley;

[0009] A number of auxiliary hydraulic cylinders 1 and force measuring instruments 11 of the same model are installed on the base 17;

[0010] A whole lower pressure plate 16 is installed above the force measuring instrument 11; the lower pressure plate 16 can be lifted by being supported by a number of auxiliary hydraulic cylinders 1;

[0011] The test sample 10 can be placed on the lower pressure plate 16.

[0012] A further technical solution of the present utility model is that it further includes a trolley for loading. The trolley includes a frame 21, the frame 21 is a three-sided frame, and the transition plate 18 can be placed on the lower pressing plate 16.

[0013] A further technical solution of the present utility model is that the transition plate 18 can be installed on the trolley.

[0014] A further technical solution of the present utility model is that the dynamometer 11 is connected to the dynamometer display 12.

[0015] A further technical solution of the present utility model is that the sample to be measured 10 is a load box to be measured.

[0016] A further technical solution of the present utility model is that the load box to be measured is connected to the high-pressure oil pump 14 for the sample.

[0017] A further technical solution of the present utility model is that a plurality of auxiliary hydraulic cylinders 1 of the same model are connected to the oil pump 7 for the auxiliary hydraulic cylinder.

[0018] A further technical solution of the present utility model is that the oil pump 7 for the auxiliary hydraulic cylinder is connected to the pipeline leakage self-locking valve 13.

[0019] Solution Two:

[0020] A reaction force frame control device for load box calibration, characterized in that an oil circuit distributor 3 is installed in front of the oil inlet of the auxiliary hydraulic cylinder 1. The oil circuit distributor 3 is connected to the oil pump 7 for the auxiliary hydraulic cylinder. The oil pump 7 for the auxiliary hydraulic cylinder is connected to the fuel tank 8. The fuel tank 8 is connected to the overflow valve 5. The overflow valve 5 is connected to the reversing valve 4 and then connected to the return oil circuit distributor 2. The reversing valve 4 is also connected to the fuel tank 8.

[0021] A further technical solution of the present utility model is that the reversing valve 4 includes a position A and a position B.

[0022] A further technical solution of the present utility model is that the return oil circuit distributor 2 is connected to the overflow valve 5 through the position A.

[0023] A further technical solution of the present utility model is that the fuel tank 8 is connected to the position B.

[0024] A further technical solution of the present utility model is that a pressure gauge 6 is installed in front of the overflow valve 4.

[0025] The present utility model adopting the above technical solutions has the following beneficial effects compared with the prior art: For Solution One: In the present invention, both the dynamometer and the oil cylinder that returns the load box to its original position after testing are installed under the base and do not move, with high safety. During the testing process, the oil cylinder generates a certain load, making the load box stable during calibration and close to the on-site working conditions.

[0026] For Solution 2: When the starting pressures of the jacks of the load cell are slightly different, the pistons can still extend synchronously, and the upper and lower plates of the load cell will not deform. After the load cell under test is calibrated, the auxiliary hydraulic cylinder works to push the lower plate to move and quickly retract the piston of the load cell, shortening the retraction time of the load cell and improving the detection efficiency. The auxiliary hydraulic cylinder and the force measuring instrument are both installed on the base, greatly reducing the weight of the upper and lower plates, reducing the load on the columns, improving the working safety, and extending the service life of the device. The auxiliary hydraulic cylinders are connected through pipeline leakage self-locking valves. When one of the hydraulic cylinders leaks, the other hydraulic cylinders will not be affected and can still normally lift and generate back pressure, allowing the device to operate normally for a short time and gaining time for device maintenance. Brief Description of the Drawings

[0027] To further illustrate the present invention, the following will be further described in conjunction with the drawings:

[0028] Figure 1 It is a structural diagram of the reaction frame control part;

[0029] Figure 2 It is a structural diagram of the reaction frame pressure equalizing system;

[0030] Figure 3 It is a schematic diagram of the cooperation between the trolley and the reaction frame;

[0031] Figure 4 It is a three-dimensional view of the trolley;

[0032] Wherein: 1. Auxiliary hydraulic cylinder; 2. Return oil circuit distributor; 3. Oil circuit distributor; 4. Directional valve; 5. Relief valve; 6. Pressure gauge; 7. Oil pump for auxiliary hydraulic cylinder; 8. Oil tank; 9. Reaction frame; 10. Test sample; 11. Force measuring instrument; 12. Force measuring instrument display; 13. Pipeline leakage self-locking valve; 14. High-pressure oil pump for sample; 15. Column; 16. Lower pressing plate; 17. Base; 18. Transition plate; 19. Wheels; 20. Track; 21. Frame. Detailed Embodiment

[0033] The present utility model will be further clarified below in conjunction with the accompanying drawings and specific embodiments. It should be understood that the following specific embodiments are only used to illustrate the present utility model and not to limit the scope of the present utility model. In the description of the present utility model, it should be noted that the orientation or positional relationship indicated by terms such as "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", "top", "bottom", etc. is based on the orientation or positional relationship shown in the accompanying drawings. It is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of the present utility model. In addition, unless otherwise clearly specified and defined, the terms "installation", "connection", and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be directly connected, or indirectly connected through an intermediate medium, and it can be the communication inside two elements. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations.

[0034] It should be noted that in this article, relational terms such as first and second are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual relationship or order between these entities or operations. Moreover, the terms "include", "comprise" or any other variant thereof are intended to cover non-exclusive inclusion, so that a process, method, article or device including a series of elements not only includes those elements, but also includes other elements not expressly listed, or also includes elements inherent to such process, method, article or device.

[0035] This patent provides multiple parallel solutions. For different expressions, they are improvement solutions or parallel solutions based on the basic solution. Each solution has its own unique features. In addition, the technical features involved in different embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other. The fixing method not described in the text can be any one of screw fixing, bolt fixing or glue bonding, etc.

[0036] Embodiment 1: In combination with all the drawings; a reaction frame equalizing device for load cell calibration, characterized in that

[0037] The reaction frame device of the reaction frame equalizing device consists of an upper pressure plate. The upper pressure plate is connected to a base 17 through a column 15. A track 20 is arranged on the base 17. A trolley can move on the track 20. A transition plate 18 is arranged above the trolley;

[0038] A number of auxiliary hydraulic cylinders 1 and load cells 11 of the same model are installed on the base 17;

[0039] A monolithic lower pressure plate 16 is installed above the force measuring instrument 11; the lower pressure plate 16 can be lifted by a number of auxiliary hydraulic cylinders 1;

[0040] The sample to be measured 10 can be placed above the lower pressure plate 16.

[0041] The substantial technical effects achieved by the technical solution herein and its implementation process, i.e., the basic functions, are as follows:

[0042] 1. The reaction frame device for load cell calibration consists of an upper pressure plate, a base, a lower pressure plate, a transition plate, columns, etc. to form a closed frame;

[0043] 2. A number of hydraulic cylinders and force measuring instruments of the same model are installed on the base;

[0044] 3. A monolithic lower pressure plate is installed above the force measuring instrument;

[0045] 4. The transition plate, i.e., the movable trolley, is driven by a hydraulic cylinder and manually controlled to run along the guide rail, which is convenient for loading and unloading the samples to be detected;

[0046] 5. The lower pressure plate is lifted by a number of auxiliary hydraulic cylinders and can be raised and lowered. When the lower pressure plate runs to fit with the transition plate, they are lifted simultaneously, and the transition plate is completely disengaged from the movable trolley;

[0047] 6. During calibration, the load force generated by the load cell is transmitted to the force measuring instrument through the transition plate and the lower pressure plate;

[0048] 7. A number of hydraulic cylinders are installed on the base. After the load cell to be calibrated is calibrated, the auxiliary hydraulic cylinders work to push the lower pressure plate to move and make the piston of the load cell return quickly, shortening the retraction time of the load cell and improving the detection efficiency;

[0049] 8. At the beginning of calibration, when the piston of the load cell extends, the auxiliary oil cylinder generates back pressure, and the pistons of each jack of the load cell extend evenly;

[0050] 9. The auxiliary hydraulic cylinders are connected through a pipeline leakage self-locking valve.

[0051] The present invention is an improvement on the traditional reaction frame technology and has the following main advantages:

[0052] 1. When the starting pressures of the jacks of the load cell are slightly different, the pistons can still extend synchronously, and the upper and lower plates of the load cell will not deform;

[0053] 2. After the load cell to be calibrated is calibrated, the auxiliary hydraulic cylinders work to push the lower pressure plate to move and make the piston of the load cell return quickly, shortening the retraction time of the load cell and improving the detection efficiency;

[0054] 3. The auxiliary hydraulic cylinder and the dynamometer are both installed on the base, which greatly reduces the weight of the upper and lower plates, relieves the load on the columns, improves the working safety, and extends the service life of the device.

[0055] 4. The auxiliary hydraulic cylinders are connected through pipeline leakage self-locking valves. When one of the hydraulic cylinders leaks, the other hydraulic cylinders are not affected and can still lift normally and generate back pressure. The device can operate normally for a short time, gaining time for device maintenance.

[0056] Embodiment 2: As a further improvable solution, a parallel solution, or an alternative independent solution, it further includes a trolley for feeding. The trolley includes a frame 21, and the frame 21 is a three-sided frame. The transition plate 18 can be placed on the lower pressing plate 16. The substantial technical effects and their implementation processes, i.e., the basic functions, of the technical solution here are as follows: With all the attached drawings, a specific trolley is provided, which can be freely pushed in and out.

[0057] Embodiment 3: As a further improvable solution, a parallel solution, or an alternative independent solution, the transition plate 18 can be placed on the trolley.

[0058] Embodiment 4: As a further improvable solution, a parallel solution, or an alternative independent solution, the dynamometer 11 is connected to the dynamometer display 12.

[0059] Embodiment 5: As a further improvable solution, a parallel solution, or an alternative independent solution, the sample to be measured 10 is a load box to be measured.

[0060] Embodiment 6: As a further improvable solution, a parallel solution, or an alternative independent solution, the load box to be measured is connected to the high-pressure oil pump 14 for the sample.

[0061] Embodiment 7: As a further improvable solution, a parallel solution, or an alternative independent solution, several auxiliary hydraulic cylinders 1 of the same model are connected to the oil pump 7 for the auxiliary hydraulic cylinder.

[0062] Embodiment 8: As a further improvable solution, a parallel solution, or an alternative independent solution, the oil pump 7 for the auxiliary hydraulic cylinder is connected to the pipeline leakage self-locking valve 13.

[0063] Solution 2: The second part of the solution mainly concerns the oil circuit part.

[0064] Embodiment 9: As a further improvable solution, a parallel solution, or an alternative independent solution,

[0065] A reaction force frame control device for load cell calibration, characterized in that an oil circuit distributor 3 is installed in front of the oil inlet of the auxiliary hydraulic cylinder 1. The oil circuit distributor 3 is connected to the oil pump 7 for the auxiliary hydraulic cylinder. The oil pump 7 for the auxiliary hydraulic cylinder is connected to the fuel tank 8. The fuel tank 8 is connected to the overflow valve 5. The overflow valve 5 is connected to the reversing valve 4 and then connected to the return oil circuit distributor 2. The reversing valve 4 is also connected to the fuel tank 8. The substantial technical effect and its implementation process, that is, the basic function, of the technical solution here are as follows: The present invention is a modification based on the traditional control system. A set of overflow valves is added at the rear end of the auxiliary hydraulic cylinder to generate back pressure during the opening process of the load cell piston, forcing the pistons of each jack of the load cell to run synchronously; a set of pressure dividers is added at the front end of the auxiliary hydraulic cylinder, and by adjusting the outlet pressure of each pressure divider, each auxiliary hydraulic cylinder works synchronously.

[0066] Embodiment Ten: As a further improvable solution, parallel solution or alternative independent solution, the reversing valve 4 includes position A and position B. The return oil circuit distributor 2 is connected to the overflow valve 5 through position A. The fuel tank 8 is connected to position B.

[0067] The substantial technical effect and its implementation process, that is, the basic function, of the technical solution here are as follows: This device consists of a reaction force frame, an auxiliary hydraulic cylinder, a force measuring instrument, a reaction force frame control system, etc. A distributor is installed in front of the oil inlet of the auxiliary hydraulic cylinder, and an overflow valve is installed at the rear end of the oil return port. A pressure gauge is installed in front of the overflow valve to record the pressure value of the overflow valve. A number of hydraulic cylinders are installed on the base. After the load cell to be calibrated is calibrated, the auxiliary hydraulic cylinder works to push the lower pressing plate to move and make the load cell piston quickly return to its position, shortening the retraction time of the load cell and improving the detection efficiency. At the start of calibration, when the load cell piston extends, the auxiliary oil cylinder generates back pressure, and the pistons of each jack of the load cell extend evenly. The auxiliary hydraulic cylinders are connected through a pipeline leakage self-locking valve. Communicate with the computer through RS485, and display, analyze data and calculate in real time and then output the detection result.

[0068] Embodiment Eleven: As a further improvable solution, parallel solution or alternative independent solution, a pressure gauge 6 is installed in front of the overflow valve 4.

[0069] The present invention is an improvement on the traditional reaction force frame technology, and mainly has the following advantages

[0070] When the starting pressures of the jacks of the load cell are slightly different, the pistons can still extend synchronously, and the upper and lower plates of the load cell will not deform;

[0071] After the load cell to be calibrated is calibrated, the auxiliary hydraulic cylinder works to push the lower pressing plate to move and make the load cell piston quickly return to its position, shortening the retraction time of the load cell and improving the detection efficiency;

[0072] Others are the same as the traditional reaction force frame control, such as data transmission, calculation and analysis.

[0073] Test process description of the reaction frame control system for load cell calibration:

[0074] 1. Adjust the reversing valve to position B;

[0075] 2. Pressurize the auxiliary hydraulic cylinder through the oil pump. The piston rod of the auxiliary hydraulic cylinder extends simultaneously. When the tested sample contacts the upper and lower plates of the reaction frame or there is a slight pressure, turn off the oil pump and stop pressurizing;

[0076] 3. Adjust the piston rods of the auxiliary hydraulic cylinders of the reaction frame to extend simultaneously through the oil circuit distributor, that is, the pressures of each auxiliary hydraulic cylinder are equal.

[0077] 4. Adjust the reversing valve to position A and adjust the back pressure of the overflow valve to above the starting pressure value of the tested sample;

[0078] Pressurize the tested sample. The piston rod of the hydraulic cylinder of the tested sample extends. Under the action of the back pressure, force each piston to be synchronized to simulate the operation of the on-site working conditions.

[0079] Innovatively, each of the above effects exists independently, and the combination of the above results can also be achieved with a set of structures.

[0080] It should be noted that the multiple solutions provided by this patent include their own basic solutions, which are independent of each other and do not restrict each other. However, they can also be combined with each other without conflict to achieve the co-realization of multiple effects.

[0081] The above shows and describes the basic principles, main features and advantages of the present invention. Those skilled in the art should understand that the present invention is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention will have various changes and improvements, and these changes and improvements all fall within the scope of the claimed invention.

Claims

1. A reaction frame control device for load cell calibration, characterized in that An oil circuit distributor (3) is installed in front of the oil inlet of the auxiliary hydraulic cylinder (1). The oil circuit distributor (3) is connected to the oil pump (7) for the auxiliary hydraulic cylinder. The oil pump (7) for the auxiliary hydraulic cylinder is connected to the fuel tank (8). The fuel tank (8) is connected to the overflow valve (5). The overflow valve (5) is connected to the reversing valve (4) and then connected to the return oil circuit distributor (2). The reversing valve (4) is also connected to the fuel tank (8).

2. The reaction frame control device for load cell calibration according to claim 1, characterized in that The reversing valve (4) includes position A and position B.

3. The reaction frame control device for load cell calibration according to claim 2, characterized in that, The return oil circuit distributor (2) is connected to the overflow valve (5) through position A.

4. The reaction frame control device for load cell calibration according to claim 2, characterized in that, The fuel tank (8) is connected to position B.

5. The reaction frame control device for load cell calibration according to claim 1, characterized in that, A pressure gauge (6) is installed in front of the overflow valve (5).

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