Pneumatic detection device for hydraulic damper

Abstract

The utility model relates to the technical field of damper detection, in particular to a pneumatic detection device for a hydraulic damper, which comprises a main frame and a pneumatic detection mechanism for applying constant pressure or tension to the hydraulic damper. The main frame comprises a top plate and a bottom plate which are horizontally arranged, the top plate and the bottom plate are fixedly connected through a plurality of vertically arranged supporting rods, a lower lug seat is fixedly mounted on the bottom plate, and an upper lug seat is arranged on the same vertical line of the lower lug seat; the pneumatic detection mechanism comprises a driving air cylinder, a pressurizing air pump and an air supply switching valve, the driving air cylinder is vertically and fixedly installed on the upper surface of the top plate, and the power output end of the driving air cylinder downwards penetrates through a through hole correspondingly formed in the top plate and is fixedly connected with the upper lug seat; according to the utility model, the pneumatic detection mechanism is arranged to provide constant pressure or tension for the detection of the hydraulic damper, different gears of the damper are detected, complex algorithms and control programs are not needed, the structure is small and exquisite, the installation is convenient, and the use prospect is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to damper detection technical field especially relates to a kind of pneumatic detection device for hydraulic damper. BACKGROUND

[0002] In recent ten years, the high attention of the state to medical devices and the urgent needs of people to rehabilitation medical services make rehabilitation medical equipment develop rapidly. Hydraulic damper has great advantage in medical device counterweight compared with counterweight block resistance.

[0003] At present, hydraulic damper test adopts large test bench, that is, test bench driven by accumulator group and oil cylinder. These devices not only need complex algorithm and control logic to accurately control force or speed output, resulting in high design complexity and high use cost, but also are often bulky, heavy and difficult to install. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem in the prior art and provides a pneumatic detection device for hydraulic damper, which is simple in structure, easy to operate and does not need complex control logic.

[0005] To achieve the above purpose, the utility model adopts the following technical scheme:

[0006] A pneumatic detection device for hydraulic damper, characterized in that:

[0007] It comprises a main frame and a pneumatic detection mechanism for applying constant pressure or tension to the hydraulic damper.

[0008] The main frame comprises a top plate and a bottom plate arranged horizontally, and the top plate and the bottom plate are connected and fixed by a plurality of vertically arranged support rods. A lower ear seat is fixedly installed on the bottom plate, and an upper ear seat is arranged on the same vertical line of the lower ear seat.

[0009] The pneumatic detection mechanism comprises a drive cylinder, a booster air pump and a gas supply switching valve. The drive cylinder is vertically fixedly installed on the upper surface of the top plate. The power output end of the drive cylinder passes through the through hole corresponding to the top plate and is fixedly connected with the upper ear seat. The two air ports of the drive cylinder are respectively connected with gas supply branch pipes. The outlet end of the booster air pump is connected with a gas supply main pipe. The gas supply main pipe is connected with the two gas supply branch pipes through the gas supply switching valve. At least one gas supply branch pipe is provided with a gas pressure gauge and an adjustable flow valve.

[0010] The technical problems to be solved by the utility model can be further realized by the following steps, the gas supply switch valve is three-position four-way reversing valve, the gas supply switch valve has working port A, working port B, working port C and working port D, wherein working port A is communicated with the gas supply main pipe, working port B and working port C are communicated with two gas supply branch pipes respectively, and working port D is the exhaust port;

[0011] When the gas supply switch valve is in the first working position, working port A, working port B, working port C and working port D are all cut off, and the driving cylinder is static;

[0012] When the gas supply switch valve is in the second working position, working port A and working port C are communicated, working port B and working port D are communicated, and the power output end of the driving cylinder drives the upper ear seat to rise;

[0013] When the gas supply switch valve is in the third working position, working port A and working port B are communicated, working port C and working port D are communicated, and the power output end of the driving cylinder drives the upper ear seat to descend.

[0014] The technical problems to be solved by the utility model can be further realized by the following steps, the pneumatic detection mechanism further includes the overflow pressure reducing valve installed on the gas supply main pipe.

[0015] The technical problems to be solved by the utility model can be further realized by the following steps, the pneumatic detection mechanism further includes the overflow pressure reducing valve installed on the gas supply main pipe.

[0016] The technical problems to be solved by the utility model can be further realized by the following steps, the upper ear seat and the lower ear seat are same in structure, the lower ear seat comprises a base and a bolt, the base comprises a horizontal rib plate and two vertical rib plates integrally connected to the left and right sides of the horizontal rib plate, the bolt is transversely installed on the two vertical rib plates, and a fish eye bearing is installed on the bolt.

[0017] The technical problems to be solved by the utility model can be further realized by the following steps, the pneumatic detection mechanism further includes the overflow pressure reducing valve installed on the gas supply main pipe.

[0018] The technical problems to be solved by the utility model can be further realized by the following steps, the pneumatic detection mechanism further includes the overflow pressure reducing valve installed on the gas supply main pipe.

[0019] Compared with the prior art, the advantages of this utility model are: by setting up a pneumatic detection mechanism to provide constant pressure or tension for the detection of hydraulic dampers, the tensile resistance and compressive resistance of hydraulic dampers can be quickly detected simply by switching the working position of the air supply switching valve; the pipeline pressure is monitored by an air pressure gauge, and the constant force is adjusted by adjusting the opening of the adjustable flow valve to detect different positions of the damper. No complicated algorithms and control programs are required. The structure is compact, easy to install, and has good application prospects. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of the structure of this utility model;

[0021] Figure 2 This is a schematic diagram of the use of this utility model;

[0022] Figure 3 This is a schematic diagram (b) illustrating the use of this utility model;

[0023] Figure 4 c is a schematic diagram of the use of this utility model;

[0024] Figure 5 d is a schematic diagram of the use of this utility model;

[0025] Figure 6 This is a schematic diagram of the air path of this utility model;

[0026] Figure 7 This is a schematic diagram of the lower ear seat of this utility model;

[0027] In the diagram: 1-Top plate; 2-Bottom plate; 3-Support rod; 4-Upper ear seat; 5-Lower ear seat; 6-Hydraulic damper; 7-Drive cylinder; 8-Booster air pump; 9-Air supply branch pipe; 10-Air supply main pipe; 11-Air supply switching valve; 12-Air pressure gauge; 13-Adjustable flow valve; 14-Support leg; 15-Overflow pressure reducing valve; 16-Horizontal stiffener; 17-Vertical stiffener; 18-Pin; 19-Fixed end; 20-Floating end. Detailed Implementation

[0028] The specific technical solutions of this utility model are further described below to enable those skilled in the art to further understand this utility model, without constituting a limitation on its rights.

[0029] In the description of this utility model, it should be understood that the terms "upper", "lower", "front", "rear", "left", "right", "top", "bottom", "inner", "outer", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the utility model.

[0030] Please refer to Figures 1-6 A pneumatic detection device for hydraulic damper, comprising a main frame and a pneumatic detection mechanism for exerting constant pressure or tension on the hydraulic damper;

[0031] The main frame comprises a top plate 1 and a bottom plate 2 arranged horizontally, which are connected and fixed by a plurality of vertically arranged support rods 3. A lower lug 5 is fixedly installed on the bottom plate 2, and an upper lug 4 is arranged on the same vertical line of the lower lug 5. The upper lug 4 is used to connect the fixed end 19 of the hydraulic damper 6, and the lower lug 5 is used to connect the floating end 20 of the hydraulic damper 6.

[0032] The pneumatic detection mechanism comprises a driving cylinder 7, a booster air pump 8 and a gas supply switching valve 11. The working pressure of the booster air pump 8 is 0.8 Mpa. The driving cylinder 7 is vertically fixedly installed on the upper surface of the top plate 1 by bolts. The power output end of the driving cylinder 7 passes through the through hole corresponding to the upper lug 4 and is fixedly connected with the upper lug 4. The stroke of the driving cylinder 7 is greater than the maximum extension stroke of the hydraulic damper 6. Two gas ports of the driving cylinder 7 are respectively connected with a gas supply branch pipe 9. The outlet of the booster air pump 8 is connected with a gas supply main pipe 10. The gas supply main pipe 10 is connected with the two gas supply branch pipes 9 through the gas supply switching valve 11. At least one gas supply branch pipe 9 is provided with an air pressure gauge 12 and an adjustable flow valve 13. The air pressure gauge 12 is used to obtain the air pressure reading, and the adjustable flow valve 13 is used to adjust the pipeline air pressure to ensure the standardization of the hydraulic damper 6 detection. The gas supply switching valve 11 has a total of three working positions, i.e. first, second and third working positions. When the gas supply switching valve 11 is in the first working position, the driving cylinder 7 is static. When the gas supply switching valve 11 is in the second working position, the power output end of the driving cylinder 7 drives the upper lug 4 to rise. When the gas supply switching valve 11 is in the third working position, the power output end of the driving cylinder 7 drives the upper lug 4 to descend.

[0033] The gas supply switching valve 11 is a three-position four-way reversing valve. The gas supply switching valve 11 is manually controlled and can be fixedly installed on the bottom plate 2 or the top plate 1. The gas supply switching valve has a working port A, a working port B, a working port C and a working port D. The working port A of the gas supply switching valve 11 is communicated with the gas supply main pipe 10. The working port B and the working port C of the gas supply switching valve 11 are respectively communicated with the two gas supply branch pipes 9. The working port D of the gas supply switching valve 11 is an exhaust port.

[0034] When the gas supply switching valve 11 is in the first working position, the working port A, the working port B, the working port C and the working port D are all disconnected, and the driving cylinder 7 is static.

[0035] When the gas supply switching valve 11 is in the second working position, the working port A and the working port C are communicated, the working port B and the working port D are communicated, and the power output end of the driving cylinder 7 drives the upper lug 4 to rise.

[0036] When the gas supply switch valve 11 is in the third working position, the working port A and the working port B are communicated, the working port C and the working port D are communicated, and the power output end of the driving cylinder 7 drives the upper ear seat 4 to descend.

[0037] The pneumatic detection mechanism further comprises an overflow pressure reducing valve 15 installed on the gas supply main pipe 10; the set pressure of the overflow pressure reducing valve 15 is set to 0.2-0.5 MPa. In this way, when the pressure exceeds the set value, the overflow pressure reducing valve 15 will automatically open to release the excess pressure, thereby protecting the pipeline and related components from damage and ensuring the safe performance of the detection process.

[0038] A pressure gauge 12 and an adjustable flow valve 13 are installed on each of the two gas supply branch pipes 9. In this way, the operator can monitor and finely adjust the gas pressure of the two gas supply branches in real time, ensuring that the pressure or tension applied to the hydraulic damper 6 is more accurate and stable, thereby improving the accuracy and flexibility of the detection.

[0039] The upper ear seat 4 and the lower ear seat 5 have the same structure, and the lower ear seat 4 is taken as an example, which comprises a base and a latch 18, the base comprises a horizontal rib plate 16 and two vertical rib plates 17 integrally connected to the left and right sides of the horizontal rib plate, and the latch 18 is transversely installed on the two vertical rib plates 17, and a fish-eye bearing (not shown in the figure) is installed on the latch; in this way, even if the upper ear seat 4 and the lower ear seat 5 are inclined during installation or after long-term use, the fish-eye bearing can ensure that the hydraulic damper 6 can be smoothly compressed or stretched.

[0040] The vertical projections of the top plate 1 and the bottom plate 2 coincide, and the support rod 3 is provided with four rods in total, and through holes are provided in the four corners of the top plate and the bottom plate for the support rods to pass through.

[0041] The support rod 3 is specifically a threaded rod; the upper end of the support rod 3 passes through the top plate 1 and extends upward, and fastening nuts A for fixing the top plate 1 are respectively arranged on the support rods 3 on both sides of the top plate; the lower end of the support rod 3 passes through the bottom plate 2 and extends downward, and fastening nuts B for fixing the bottom plate 2 are respectively arranged on the support rods 3 on both sides of the bottom plate 2; and a support leg 14 is installed on the lower end of the support rod. In this way, when facing hydraulic dampers 6 of different specifications, the fastening nuts B for fixing the bottom plate 2 are loosened, and the height of the bottom plate 2 and the lower ear seat 5 is adjusted, so that the distance between the upper ear seat 4 and the lower ear seat 5 is always greater than the maximum stroke of the hydraulic damper 6.

[0042] During installation, the pneumatic testing device for the hydraulic damper described in this utility model is first connected and fixed by the top plate 1, the bottom plate 2 and the support rod 3 through fastening nuts A and B, ensuring that the distance between the top plate 1 and the bottom plate 2 is greater than the maximum stroke of the hydraulic damper 6 to be tested. Then, the lower ear seat 5 is installed on the bottom plate 2, the drive cylinder 7 is installed on the top plate 1, the upper ear seat 4 is connected to the power output end of the drive cylinder 7, and the air supply branch pipe 9 is connected to the air port of the drive cylinder 7 to ensure smooth air circuit connection.

[0043] In use, the fixed end and floating end of the hydraulic damper 6 are respectively mounted on the pins 18 of the upper ear seat 4 and the lower ear seat 5 via fisheye bearings. Figure 2 , 3 Then turn on the booster pump 8 and adjust the throttle valve to the appropriate opening, and switch the air supply switching valve 11 from the first working position ( Figure 6 Switch from the middle position to the third working position ( Figure 6 (Lower position), at this time, working port A and working port B are connected, working port C and working port D are connected, the power output end of the drive cylinder 7 drives the upper ear seat 4 to descend, driving the hydraulic damper 6 to compress ( Figure 4 At this point, timing begins; timing stops when compression reaches its limit, and this time is the compression time at this pressure and gear level; then, the air supply switching valve 11 is switched from the third working position to the second working position. Figure 6 (Upper position), at this time, working port A and working port C are connected, working port B and working port D are connected, the power output end of the drive cylinder 7 drives the upper ear seat 4 to rise, driving the hydraulic damper 6 to stretch ( Figure 5 At this point, timing begins; timing stops when the tension reaches its maximum. This time is the stretching time at this gear and with this tension. At this point, the compression and tension tests are complete, and the hydraulic damper 6 can be replaced as needed, or the next set of tests can be performed directly.

[0044] Obviously, the described embodiments are only some, not all, of the embodiments of this utility model. All other embodiments obtained by those skilled in the art based on the embodiments of this utility model without inventive effort are within the scope of protection of this utility model.

Claims

1. A pneumatic detection device for hydraulic dampers, characterized in that: it comprises a main frame and a pneumatic detection mechanism for exerting constant pressure or tension on the hydraulic dampers; the main frame comprises a top plate and a bottom plate arranged horizontally, which are connected and fixed by a plurality of vertically arranged support rods, a lower ear seat is fixedly installed on the bottom plate, and an upper ear seat is arranged on the same vertical line of the lower ear seat; the pneumatic detection mechanism comprises a driving cylinder, a booster air pump and a gas supply switching valve, wherein the driving cylinder is vertically fixedly installed on the upper surface of the top plate, the power output end of the driving cylinder passes through the through hole corresponding to the top plate and is fixedly connected with the upper ear seat, the two gas ports of the driving cylinder are respectively connected with gas supply branch pipes, the outlet end of the booster air pump is connected with a gas supply main pipe, the gas supply main pipe is connected with the two gas supply branch pipes through the gas supply switching valve, and a gas pressure gauge and an adjustable flow valve are installed on at least one gas supply branch pipe. The gas supply switching valve is specifically a three-position four-way reversing valve, which has working port A, working port B, working port C and working port D, wherein working port A is in communication with the gas supply main pipe, working port B and working port C are respectively in communication with the two gas supply branch pipes, and working port D is a gas discharge port; When the gas supply switching valve is in the first working position, working port A, working port B, working port C and working port D are all disconnected, and the driving cylinder is stationary; When the gas supply switching valve is in the second working position, working port A and working port C are in communication, working port B and working port D are in communication, and the power output end of the driving cylinder drives the upper ear seat to rise; 2. The pneumatic detection device for a hydraulic damper according to claim 1, characterized by: When the gas supply switching valve is in the third working position, working port A and working port B are in communication, working port C and working port D are in communication, and the power output end of the driving cylinder drives the upper ear seat to descend. The pneumatic detection mechanism further comprises an overflow pressure reducing valve installed on the gas supply main pipe. A gas pressure gauge and an adjustable flow valve are installed on each of the two gas supply branch pipes. The upper ear seat and the lower ear seat have the same structure, the lower ear seat comprises a base and a latch, the base comprises a horizontal rib plate and two vertical rib plates integrally connected to the left and right sides of the horizontal rib plate, the latch is transversely installed on the two vertical rib plates, and a fish eye bearing is installed on the latch.

3. The pneumatic detection device for a hydraulic damper according to claim 1, characterized by: The vertical projections of the top plate and the bottom plate coincide, the support rods are provided in total four, and through holes for the support rods to pass through are arranged at the four corners of the top plate and the bottom plate.

4. The pneumatic detection device for a hydraulic damper according to claim 1, characterized by: The support rods are specifically threaded rods, the upper ends of the support rods pass through the top plate and extend upward, fastening nuts A for fixing the top plate are respectively arranged on the support rods at both sides of the top plate, the lower ends of the support rods pass through the bottom plate and extend downward, fastening nuts B for fixing the bottom plate are respectively arranged on the support rods at both sides of the bottom plate, and feet are installed on the lower ends of the support rods.

5. The pneumatic detection device for a hydraulic damper according to claim 1, characterized by: ​ 6. The pneumatic detection device for a hydraulic damper according to claim 1, characterized by: ​ 7. The pneumatic detection device for a hydraulic damper according to claim 1, characterized by: ​

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