Hydraulic loading loop of bridge deck loading test device
By introducing a balancing hydraulic cylinder into the bridge deck loading test device, the problem of large fluctuations in loading force was solved, and a more stable bridge deck loading test was achieved.
Patent Information
- Application Number
- CN202520150040.8
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-01-22
- Publication Date
- 2025-11-25
- Estimated Expiration
- 2035-01-22
AI Technical Summary
In existing bridge deck loading test devices, the loading force between the two hydraulic cylinders is prone to large fluctuations, which affects the accuracy of bridge deck testing.
A balancing hydraulic cylinder is installed between the two loading hydraulic cylinders. When the oil in the oil tank enters the two inlet sides of the balancing hydraulic cylinder, the pressure is made the same. The oil pressure on the outlet side of the balancing hydraulic cylinder is also the same, so that the piston chamber pressure of the two loading hydraulic cylinders is the same, reducing the fluctuation of the loading force.
By balancing the hydraulic cylinders, the loading pressure between the two loading hydraulic cylinders was stabilized, the fluctuation of loading force was reduced, and the accuracy and reliability of the bridge deck loading test were improved.
Smart Images
Figure CN223594577U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The utility model belongs to bridge deck loading test technical field, concretely relates to a kind of hydraulic loading loop of bridge deck loading test device. BACKGROUND
[0002] Wheel type bridge deck accelerated loading test device is used to detect the strain of each position of bridge, and the loading force is applied to the tire on both sides of test device by two hydraulic cylinders, so that the tire can run on the bridge deck under preset loading force.
[0003] When the imbalance of the counterweight of the test device itself and the unevenness of the bridge deck occur, the loading force between the two hydraulic cylinders will fluctuate greatly, which will affect the test of the bridge deck. INVENTION CONTENTS
[0004] The utility model embodiment provides a kind of hydraulic loading loop of bridge deck loading test device, to solve the problem of the loading force fluctuation of two hydraulic cylinders in the bridge deck loading test device in prior art.
[0005] To achieve the above object, the technical scheme adopted by the utility model is as follows:
[0006] A kind of hydraulic loading loop of bridge deck loading test device is provided, comprising:
[0007] Oil tank has oil outlet and oil return port;
[0008] Two loading hydraulic cylinders, each having a piston cavity and a piston rod cavity;The cross-sectional area of the piston cavity is greater than the cross-sectional area of the piston rod cavity, and the piston rod cavity is communicated with the oil return port of the oil tank by a first pipeline;
[0009] Balancing hydraulic cylinder is connected with a partition plate inside, and the partition plate separates the inside of the balancing hydraulic cylinder into two chambers that are exactly equal, and each chamber is slidably provided with a piston;
[0010] Wherein, the two sides of each chamber at the piston are oil inlet side and oil outlet side respectively, and the oil inlet side of the two chambers is communicated with the oil outlet of the oil tank by a second pipeline;The oil outlet side of the two chambers is communicated with the piston cavity of corresponding loading hydraulic cylinder by a third pipeline respectively.
[0011] In a possible implementation manner, a positioning rod is arranged in the balancing hydraulic cylinder, the positioning rod penetrates the two chambers, and the two ends of the positioning rod are connected with the two ends of the balancing hydraulic cylinder respectively;Wherein, the piston in each chamber is slidably matched with the positioning rod.
[0012] In a possible implementation manner, a fourth pipeline is connected to the second pipeline, and at least one energy accumulator is connected to the fourth pipeline.
[0013] In a possible implementation, an oil passage filter is arranged on each of the first pipeline, the second pipeline and the third pipeline.
[0014] In a possible implementation, a blockage alarm mechanism is arranged on each of the first pipeline and the second pipeline, and each blockage alarm mechanism comprises a pressure sensor and an alarm; when the detection value of the pressure sensor is greater than a preset pressure, the alarm alarms.
[0015] In a possible implementation, the hydraulic loading circuit further comprises a temperature control module, and the temperature control module comprises a heating structure arranged in the oil tank, a cooling structure connected to the first pipeline, and a temperature transmitter arranged on the oil tank.
[0016] In a possible implementation, the cooling structure comprises a heat exchanger and a fan arranged on one side of the heat exchanger, and the heat exchanger has a heat exchange channel for oil flow.
[0017] In a possible implementation, a liquid level gauge is arranged in the oil tank, and the oil tank is further provided with an oil filling port.
[0018] In a possible implementation, a pressure transmitter is connected to each of the fourth pipeline and the second pipeline, and a proportional pressure reducing valve is arranged between the two pressure transmitters, and the proportional pressure reducing valve is connected to the second pipeline.
[0019] In a possible implementation, a one-way valve is connected to the second pipeline between the proportional pressure reducing valve and the oil tank.
[0020] Compared with the prior art, the hydraulic loading circuit of the bridge loading test device provided by the utility model balances the loading pressure between the two loading hydraulic cylinders, reduces the large loading force fluctuation between the two hydraulic cylinders, and thus facilitates the loading test of the bridge. BRIEF DESCRIPTION OF DRAWINGS
[0021] Fig. 1 FIG. 1 is a schematic diagram of a hydraulic loading circuit of a bridge loading test device provided by an embodiment of the utility model;
[0022] Fig. 2 FIG. 2 is a schematic diagram of a balance hydraulic cylinder part of the hydraulic loading circuit of the bridge loading test device provided by the embodiment of the utility model.
[0023] Explanation of reference signs: 1, oil tank; 2, loading hydraulic cylinder; 3, balance hydraulic cylinder; 4, first pipeline; 5, partition plate; 6, second pipeline; 7, third pipeline; 8, variable pump; 9, blockage alarm mechanism; 10, check valve; 11, proportional pressure reducing valve; 12, electromagnetic overflow valve; 13, fifth pipeline; 14, sixth pipeline; 15, seventh pipeline; 16, supporting hydraulic cylinder; 17, pressure transmitter; 18, fourth pipeline; 19, pressure gauge; 20, accumulator; 21, liquid level meter; 22, oil filling port; 23, heating structure; 24, temperature transmitter; 25, heat exchanger; 26, fan; 27, chamber; 28, positioning rod. DETAILED DESCRIPTION
[0024] In order to make the technical problems, technical schemes and beneficial effects of the utility model clearer and more apparent, the utility model will be further described in detail below in combination with the drawings and examples. It should be understood that the specific examples described herein are only used to explain the utility model and not to limit the utility model.
[0025] Please refer to Figs. 1-2 , now a kind of hydraulic loading loop of bridge deck loading test device provided by the utility model will be described. The hydraulic loading loop of the kind of bridge deck loading test device, including oil tank 1, two loading hydraulic cylinders 2 and balance hydraulic cylinder 3;Oil tank 1 has oil outlet and oil return port;Two loading hydraulic cylinders 2 all have piston cavity and piston rod cavity;The cross-sectional area of piston cavity is greater than the cross-sectional area of piston rod cavity, and piston rod cavity is communicated with the oil return port of oil tank 1 by first pipeline 4;Balance hydraulic cylinder 3 is connected with partition plate 5 inside, and partition plate 5 divides the inside of balance hydraulic cylinder 3 into two chambers 27 that are completely equal, and each chamber 27 is slidably provided with a piston;Wherein, each chamber 27 is on the two sides of the piston respectively as oil inlet side and oil outlet side, and the oil inlet side of two chambers 27 is communicated with the oil outlet of oil tank 1 by second pipeline 6;The oil outlet side of two chambers 27 is communicated with the piston cavity of corresponding loading hydraulic cylinder 2 respectively by third pipeline 7. Positioning rod 28 is arranged in balance hydraulic cylinder 3, positioning rod 28 penetrates two chambers 27, and the two ends of positioning rod 28 are connected with the two ends of balance hydraulic cylinder 3 respectively;Wherein, the piston in each chamber 27 is in sliding fit with positioning rod 28;Positioning rod 28 is fixed on balance hydraulic cylinder 3;Through the above setting, the stability of the piston sliding in chamber 27 can be ensured.
[0026] The hydraulic loading loop of the bridge loading test device is provided, compared with the prior art, the balance hydraulic cylinder 3 is arranged between the two loading hydraulic cylinders 2, when the oil in the oil tank 1 enters the two oil inlet sides of the balance hydraulic cylinder 3, the pressure of the two oil inlet sides of the balance hydraulic cylinder 3 is the same, in the process that the oil in the oil inlet side pushes the piston to slide, the oil pressure of the two oil outlet sides of the balance hydraulic cylinder 3 is the same, and then the pressure of the piston cavities of the two loading hydraulic cylinders 2 is the same, through the above arrangement, the loading pressure between the two loading hydraulic cylinders 2 can be balanced, the larger loading force fluctuation between the two hydraulic cylinders is reduced, and then the loading test on the bridge is facilitated.
[0027] It should be noted that the second pipeline 6 connected with the oil outlet of the oil tank 1 is sequentially connected with a variable pump 8, a blockage alarm mechanism 9, a check valve 10 and a proportional pressure reducing valve 11; the electromagnetic overflow valve 12 is arranged in parallel with the second pipeline 6 at the position of the check valve 10, the electromagnetic overflow valve 12 is connected with the second pipeline 6 through the fifth pipeline 13 and the sixth pipeline 14, and the check valve 10 is located between the fifth pipeline 13 and the sixth pipeline 14; the fifth pipeline 13 communicates with the first pipeline 4; the sixth pipeline 14 is connected with the support hydraulic cylinder 16 through the seventh pipeline 15, and the piston rod cavity of the support hydraulic cylinder 16 communicates with the first pipeline 4; the support hydraulic cylinder 16 is two groups, since the two groups of support hydraulic cylinders 16 only play a supporting role and do not serve as loading force output, the balance hydraulic cylinder 3 does not need to be arranged between the two groups of support hydraulic cylinders 16; the proportional pressure reducing valve 11 and the pressure transmitter 17 are connected on the seventh pipeline 15.
[0028] The fourth pipeline 18 is connected on the second pipeline 6 at the position between the check valve 10 and the proportional pressure reducing valve 11, the pressure gauge 19, the pressure transmitter 17 and at least one energy accumulator 20 are connected on the fourth pipeline 18; four energy accumulators 20 are taken as an example for description in the embodiment; the energy accumulators 20 are arranged on the oil inlet pipeline of the balance hydraulic cylinder 3, when pressure fluctuation occurs, the energy accumulators 20 can stabilize the pressure of the overall hydraulic loop and reduce the pressure fluctuation in the hydraulic loop.
[0029] The pressure gauge 19 and the pressure transmitter 17 are connected on the second pipeline 6 at the position between the proportional pressure reducing valve 11 and the balance hydraulic cylinder 3, the oil passing through the proportional pressure reducing valve 11 can be detected in pressure, so that the pressure entering the oil inlet side of the balance hydraulic cylinder 3 is adjusted, and then the loading force of the two loading hydraulic cylinders 2 is adjusted. The hydraulic transmitter and the proportional pressure reducing valve 11 are adopted to perform closed-loop control, precise control of the pressure is realized, and the accurate and smooth loading force is ensured.
[0030] For example, Figs. 1-2As shown, the first pipeline 4 is also provided with a blockage alarm mechanism 9, which comprises a pressure sensor and an alarm, the pressure sensor can detect the oil pressure in the pipeline, and when the oil pressure in the pipeline is higher than the preset pressure, the alarm can issue an alarm to remind the operator to handle in time.
[0031] As shown in the drawings, Figs. 1-2 As shown, the oil tank 1 is provided with a liquid level gauge 21, and the oil tank 1 is also provided with an oil filling port 22; the liquid level gauge 21 on the oil tank 1 can detect the oil liquid level height in the oil tank 1, and when the oil liquid level height is lower than the set height, the operator can add oil liquid to the oil tank 1 from the oil filling port 22.
[0032] As shown in the drawings, Figs. 1-2 As shown, the hydraulic loading circuit further comprises a temperature control module, which comprises a heating structure 23 arranged in the oil tank 1, a cooling structure connected to the first pipeline 4, and a temperature transmitter 24 arranged on the oil tank 1; the heating structure 23 can adopt an electric heating mode, and when the oil liquid in the oil tank 1 circulates, the oil liquid can be heated by adopting an electric heating mode. The cooling structure comprises a heat exchanger 25 and a fan 26 arranged on one side of the heat exchanger 25, and the heat exchanger 25 has a heat exchange channel for oil liquid circulation; the oil liquid in the first pipeline 4 flows through the heat exchange channel in the heat exchanger 25, and the heat exchanger 25 can be cooled by the fan 26, thereby cooling the oil liquid in the first pipeline 4; the temperature transmitter 24 can detect the temperature of the oil liquid, and by cooperating with the heating structure 23 and the cooling structure, the oil liquid can be kept within a preset temperature range, reducing the instability of the hydraulic circuit caused by excessively high or low temperature of the oil liquid.
[0033] As shown in the drawings, Figs. 1-2 As shown, the first pipeline 4, the second pipeline 6 and the third pipeline 7 are all provided with an oil filter (not shown in the figure); the oil filter can filter the oil liquid, which can ensure the quality of the oil liquid, reduce impurities in the oil liquid, and thereby reduce the problem of circuit impact caused by impurities in the oil liquid.
[0034] The above is only a preferred embodiment of the present application, and is not intended to limit the present application, and any modification, equivalent replacement and improvement made within the spirit and principle of the present application shall be included in the protection scope of the present application.
Claims
1. A hydraulic loading circuit for a bridge deck loading test device, characterized in that, include: The fuel tank has an oil outlet and an oil return outlet; Both loading hydraulic cylinders have a piston chamber and a piston rod chamber; The cross-sectional area of the piston chamber is larger than that of the piston rod chamber, and the piston rod chamber is connected to the oil return port of the oil tank through a first pipeline; A balanced hydraulic cylinder has an internal partition that divides the interior of the balanced hydraulic cylinder into two completely equal chambers, each of which is equipped with a sliding piston. Each chamber has an oil inlet side and an oil outlet side on both sides of the piston, and the oil inlet sides of the two chambers are connected to the oil outlet of the oil tank through a second pipeline; the oil outlet sides of the two chambers are connected to the piston chamber of the corresponding loaded hydraulic cylinder through a third pipeline.
2. The hydraulic loading circuit of the bridge deck loading test device as described in claim 1, characterized in that, The balancing hydraulic cylinder is equipped with a positioning rod that passes through two chambers, and the two ends of the positioning rod are respectively connected to the two ends of the balancing hydraulic cylinder; wherein, the piston in each chamber slides in cooperation with the positioning rod.
3. The hydraulic loading circuit of the bridge deck loading test device as described in claim 1, characterized in that, The second pipeline is connected to a fourth pipeline, and at least one energy accumulator is connected to the fourth pipeline.
4. The hydraulic loading circuit of the bridge deck loading test device as described in claim 1, characterized in that, Oil filters are provided on the first pipeline, the second pipeline, and the third pipeline.
5. The hydraulic loading circuit of the bridge deck loading test device as described in claim 4, characterized in that, Both the first pipeline and the second pipeline are equipped with a blockage alarm mechanism. Each blockage alarm mechanism includes a pressure sensor and an alarm. When the detected value of the pressure sensor is greater than a preset pressure, the alarm will sound.
6. The hydraulic loading circuit of the bridge deck loading test device as described in claim 1, characterized in that, The hydraulic loading circuit also includes a temperature control module, which includes a heating structure installed in the oil tank, a cooling structure connected to the first pipeline, and a temperature transmitter installed on the oil tank.
7. The hydraulic loading circuit of the bridge deck loading test device as described in claim 6, characterized in that, The cooling structure includes a heat exchanger and a fan disposed on one side of the heat exchanger, wherein the heat exchanger has a heat exchange channel for oil flow.
8. The hydraulic loading circuit of the bridge deck loading test device as described in claim 1, characterized in that, The oil tank is equipped with a level gauge and an oil filling port.
9. The hydraulic loading circuit of the bridge deck loading test device as described in claim 3, characterized in that, Pressure transmitters are connected to both the fourth and second pipelines, and a proportional pressure reducing valve is provided between the two pressure transmitters. The proportional pressure reducing valve is connected to the second pipeline.
10. The hydraulic loading circuit of the bridge deck loading test device as described in claim 9, characterized in that, A check valve is connected to the second pipeline between the proportional pressure reducing valve and the oil tank.