Large-flow switching valve group and vibration test system with same

Abstract

The utility model provides a large-flow switching valve group and a vibration test system with the same, the switching valve group comprises a valve block and a first oil cylinder, and a sliding space, an oil inlet channel and a first oil outlet channel are arranged in the valve block; the first oil cylinder comprises a first sleeve and a second sleeve, a piston and a piston rod are arranged in the first sleeve, a first oil cavity is formed between the upper inner wall of the first sleeve and the upper end face of the piston, a second oil cavity is formed between the lower inner wall of the first sleeve and the lower end face of the piston, and a first oil inlet and a second oil inlet are formed in the first sleeve. The first oil inlet is communicated with the first oil cavity, the second oil inlet is communicated with the second oil cavity, a sliding rod is arranged in the second sleeve and can slide in the second sleeve and the sliding space, the piston rod is connected with the sliding rod, and oil is injected into the first oil inlet or the second oil inlet. The piston rod drives the sliding rod to move upwards or downwards so that the oil inlet channel and the first oil outlet channel can be blocked or connected. Large-flow output is met, and cost is saved.

Description

Technical Field

[0001] The utility model relates to the technical field of vibration test benches, in particular to a large-flow switching valve group and a vibration test system having the same. Background Art

[0002] Vibration test is a typical test of environmental mechanical test, which is widely used in mechanical simulation verification and reliability verification of automotive parts, aerospace products, etc.

[0003] For low-frequency and large-displacement vibration tests on heavy-loaded and high-center-of-gravity specimens, electric vibration tables can no longer meet the requirements due to their limited displacement. Currently, hydraulic drive is mostly used to complete the test, but the work surface size of the single-axis large hydraulic vibration table on the market is limited, and the maximum size does not exceed 3000mm×3000mm, and the products that can be used for vibration tests are limited. At the same time, a hydraulic vibration table needs to be equipped with a hydraulic pump station. When horizontal and vertical tests are required, another hydraulic pump station needs to be added, or the oil circuit needs to be switched. In order to reduce costs, the oil circuit switching method is usually selected. The traditional small-flow oil circuit switching can be achieved through the solenoid valve, but when encountering high-pressure and large-flow oil circuit switching, the traditional solenoid valve cannot meet the requirements due to factors such as size. Summary of the invention

[0004] The utility model aims to provide a large flow switching valve group and a vibration test system having the same, so as to solve the above problems.

[0005] The technical solution adopted by the utility model is:

[0006] A large flow switching valve group comprises a valve block and a first oil cylinder arranged on the valve block, wherein a sliding space, an oil inlet channel and a first oil outlet channel are arranged in the valve block, the oil inlet channel is connected to the first oil outlet channel, and the sliding space is connected to the first oil outlet channel;

[0007] The first oil cylinder includes a first sleeve and a second sleeve, a piston and a piston rod are arranged in the first sleeve, a first oil chamber is formed between the upper inner wall of the first sleeve and the upper end surface of the piston, and a second oil chamber is formed between the lower inner wall of the first sleeve and the lower end surface of the piston, a first oil inlet and a second oil inlet are arranged on the first sleeve, the first oil inlet is connected to the first oil chamber, and the second oil inlet is connected to the second oil chamber, a sliding rod is arranged in the second sleeve, the first sleeve, the second sleeve and the sliding space are arranged in sequence from top to bottom, the sliding space cooperates with the sliding rod, the sliding rod can slide in the second sleeve and the sliding space, the piston rod is connected to the sliding rod, oil is injected into the first oil inlet or the second oil inlet, and the piston rod drives the sliding rod to move upward or downward to block or connect the oil inlet channel and the first oil outlet channel.

[0008] As a further improved technical solution of the utility model, a third oil chamber is formed between the upper inner wall of the second sleeve and the upper end surface of the sliding rod, and a fourth oil chamber is formed between the lower inner wall of the second sleeve and the lower end of the sliding rod. The third oil chamber and the fourth oil chamber maintain equal pressure, and the fourth oil chamber is connected to the first oil outlet channel.

[0009] As a further improved technical solution of the utility model, an isobaric pipe is provided between the third oil chamber and the fourth oil chamber for communication.

[0010] As a further improved technical solution of the utility model, the piston rod and the sliding rod are threadedly connected.

[0011] As a further improved technical solution of the utility model, a sealing gasket is provided at the connection between the fourth oil chamber and the first oil outlet channel.

[0012] As a further improved technical solution of the utility model, the sliding rod comprises a sliding rod body and a spherical end portion, and the sealing gasket is a spherical sealing gasket matched with the spherical end portion.

[0013] As a further improved technical solution of the utility model, a guide sleeve is arranged in the second sleeve, the slide rod can slide in the guide sleeve, and the guide sleeve is used to guide the sliding of the slide rod.

[0014] A vibration test system includes a vibration isolation foundation, a hydraulic pump station, an accumulator station, a control device, a horizontal vibration device, a vertical vibration device and any of the above-mentioned large-flow switching valve groups. A solenoid valve and a second oil cylinder are also arranged on the valve block. The structure of the second oil cylinder is consistent with that of the first oil cylinder. The first oil cylinder is connected to the horizontal vibration device, and the second oil cylinder is connected to the vertical vibration device. The control device is used to send horizontal and vertical signals to the large-flow switching valve group to control the operation of the first oil cylinder and the second oil cylinder.

[0015] As a further improved technical solution of the utility model, a second oil outlet channel is further provided on the valve block, the first oil outlet channel is connected to the horizontal vibration device, and the second oil outlet channel is connected to the vertical vibration device.

[0016] As a further improved technical solution of the utility model, the accumulator station includes an oil inlet accumulator station and an oil return accumulator station, an oil inlet accumulator pipeline is arranged between the oil inlet accumulator station and the valve block, an oil inlet accumulator channel is arranged in the valve block, and the oil inlet accumulator pipeline is connected to the oil inlet accumulator channel.

[0017] The beneficial effects of the utility model are:

[0018] Through the above structure, the first oil cylinder and the second oil cylinder are driven to switch the oil circuits. By means of double switching of the oil circuits, the large flow output function is met, saving the test cost. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a structural diagram of the vibration test system;

[0020] Figure 2 yes Figure 1 Enlarged view of point A in the middle;

[0021] Figure 3 It is a schematic diagram of the internal structure of the switching valve group;

[0022] Figure 4 is a cross-sectional view of the switching valve group;

[0023] Figure 5 yes Figure 4 Enlarged view of point B in the middle;

[0024] Figure 6 It is a schematic diagram of the internal structure of the valve block.

[0025] Among them: 100-switching valve group, 110-valve block, 111-sliding space, 112-oil inlet channel, 113-first oil outlet channel, 114-second oil outlet channel, 115-oil inlet energy storage channel, 120-first oil cylinder, 121-first sleeve, 1211-first oil chamber, 1212-second oil chamber, 1213-first oil inlet, 1214-second oil inlet, 122-second sleeve, 1221-third oil chamber, 1222-fourth oil chamber, 123-piston, 124-piston rod, 125 -slide rod, 1251-slide rod body, 1252-spherical end, 126-isobaric tube, 127-spherical sealing pad, 128-guide sleeve, 130-second oil cylinder, 200-vibration isolation foundation, 300-hydraulic pump station, 310-oil inlet main pipeline, 410-oil inlet accumulator station, 420-oil return accumulator station, 430-oil inlet accumulator pipeline, 500-control device, 600-horizontal vibration device, 610-horizontal oil inlet main pipeline, 700-vertical vibration device, 710-vertical oil inlet main pipeline. DETAILED DESCRIPTION

[0026] The present invention will be described in detail below in conjunction with the specific embodiments shown in the accompanying drawings. However, these embodiments do not limit the present invention, and any structural, methodological, or functional changes made by a person skilled in the art based on these embodiments are all within the scope of protection of the present invention.

[0027] If the utility model involves directions (e.g., up, down, left, right, front, back, outside, inside, etc.) when describing, it is necessary to define the directions involved, such as "In order to clearly express the positions and directions described in the utility model, the end close to the operator is the proximal end, and the end away from the operator is the distal end." Or define it with the paper as a reference, etc. Of course, if the positional relationship between the two is defined by mutual reference in the subsequent description, it does not need to be defined here.

[0028] A large flow switching valve group 100, such as Figures 2 to 6 As shown, it includes a valve block 110 and a first oil cylinder 120 disposed on the valve block 110, wherein a sliding space 111, an oil inlet channel 112 and a first oil outlet channel 113 are disposed in the valve block 110, wherein the oil inlet channel 112 is connected to the first oil outlet channel 113, and the sliding space 111 is connected to the first oil outlet channel 113;

[0029] The first oil cylinder 120 includes a first sleeve 121 and a second sleeve 122. A piston 123 and a piston rod 124 are arranged in the first sleeve 121. A first oil chamber 1211 is formed between the upper inner wall of the first sleeve 121 and the upper end surface of the piston 123. A second oil chamber 1212 is formed between the lower inner wall of the first sleeve 121 and the lower end surface of the piston 123. A first oil inlet 1213 and a second oil inlet 1214 are arranged on the first sleeve 121. The first oil inlet 1213 is connected to the first oil chamber 1211, and the second oil inlet 1214 is connected to the second oil chamber 1212, a slide bar 125 is arranged in the second sleeve 122, and the first sleeve 121, the second sleeve 122 and the sliding space 111 are arranged in sequence from top to bottom, the sliding space 111 cooperates with the slide bar 125, and the slide bar 125 can slide in the second sleeve 122 and the sliding space 111, the piston rod 124 is connected to the slide bar 125, and oil is injected into the first oil inlet 1213 or the second oil inlet 1214, and the piston rod 124 drives the slide bar 125 to move upward or downward, thereby blocking or connecting the oil inlet channel 112 and the first oil outlet channel 113.

[0030] like Figure 5 As shown, a third oil chamber 1221 is formed between the upper inner wall of the second sleeve 122 and the upper end surface of the sliding rod 125, and a fourth oil chamber 1222 is formed between the lower inner wall of the second sleeve 122 and the lower end of the sliding rod 125. The third oil chamber 1221 and the fourth oil chamber 1222 maintain equal pressure, and the fourth oil chamber 1222 is connected to the first oil outlet channel 113.

[0031] An isobaric pipe 126 is provided between the third oil chamber 1221 and the fourth oil chamber 1222 to communicate with each other, and the isobaric pipe 126 is used to ensure that the pressure between the third oil chamber 1221 and the fourth oil chamber 1222 is always constant.

[0032] The piston rod 124 and the slide rod 125 are threadedly connected, and the connection is tight and easy to install.

[0033] As a further improvement of the present invention, a sealing gasket is provided at the connection between the fourth oil chamber 1222 and the first oil outlet channel 113 , so as to improve the sealing effect and avoid a hard connection between the sliding rod 125 and the valve block 110 .

[0034] As an embodiment of the present utility model, Figure 4 As shown, the slide bar 125 includes a slide bar body 1251 and a spherical end 1252 , and the sealing gasket is a spherical sealing gasket 127 matched with the spherical end 1252 .

[0035] A guide sleeve 128 is provided in the second sleeve 122, and the guide sleeve 128 is welded in the second sleeve 122. The slide bar 125 can slide in the guide sleeve 128, and the guide sleeve 128 is used to guide the sliding of the slide bar 125. Preferably, the guide sleeve 128 is a guide copper sleeve, and the guide sleeve 128 made of copper is softer than the guide sleeve 128 made of other materials, so that it is easier to produce a guiding effect and reduce the friction between the slide bar 125 and the slide bar 125.

[0036] The piston 123 and the piston rod 124 can slide in the first sleeve 121, and the slide bar 125 can slide in the guide copper sleeve, and the external oil flows from the oil inlet channel 112 to the first oil outlet channel 113. When oil is supplied to the first oil inlet port 1213, the oil in the first oil chamber 1211 continues to increase. At this time, the second oil chamber 1212 is connected to the oil return port, and the pressure is zero. The pressure in the first oil chamber 1211 is greater than the pressure in the second oil chamber 1212. The pressure in the first oil chamber 1211 is equal to the pressure in the third oil chamber 1221. The pressure in the first oil chamber 1211 is equal to the pressure in the fourth oil chamber 1222. The piston 123 and the piston rod 124 move toward the fourth oil chamber 1222 and push the slide bar 125 to move toward the fourth oil chamber 1222. When moving to the lowermost end, the spherical end 1252 abuts against and presses the spherical sealing gasket, thereby blocking the oil from flowing from the oil inlet channel 112 to the first oil outlet channel 1214, the oil in the second oil chamber 1212 continues to increase. At this time, the first oil chamber 1211 is connected to the oil return port, and the pressure is zero. The pressure in the second oil chamber 1212 is greater than the pressure in the first oil chamber 1211. The pressure in the second oil chamber 1212 is equal to the pressure in the third oil chamber 1221 and the pressure in the fourth oil chamber 1222. The piston 123 and the piston rod 124 move toward the first oil chamber 1211 and drive the sliding rod 125 to move toward the first oil chamber 1211. The spherical end 1252 is separated from the spherical sealing gasket 127, so that the oil can flow from the oil inlet channel 112 to the first oil outlet channel 113, thereby realizing oil circuit conduction.

[0037] A vibration test system, such as Figures 1-2As shown, it includes a vibration isolation foundation 200, a hydraulic pump station 300, an accumulator station, a control device 500, a horizontal vibration device 600, a vertical vibration device 700 and the large flow switching valve group 100 mentioned above, and a second oil cylinder 130 is also arranged on the valve block 110. The structure of the second oil cylinder 130 is consistent with that of the first oil cylinder 120. The first oil cylinder 120 is connected to the horizontal vibration device 600, and the second oil cylinder 130 is connected to the vertical vibration device 700. An oil inlet main pipeline 310 is arranged between the hydraulic pump station 300 and the valve block 110, and the oil inlet main pipeline 310 is connected to the oil inlet channel 112. The hydraulic pump station 300 is provided with an oil return main pipeline. A horizontal oil inlet main pipeline 610 is arranged between the horizontal vibration device 600 and the valve block 110, and the horizontal oil inlet main pipeline 610 is connected to the first oil outlet channel 113. A vertical oil inlet main pipeline 710 is arranged between the vertical vibration device 700 and the valve block 110. A second oil outlet channel 114 is also arranged in the valve block 110, and the second oil outlet channel 114 is connected to the oil inlet channel 112. The vertical oil inlet main pipeline 710 is connected to the second oil outlet channel 114.

[0038] The accumulator station includes an oil inlet accumulator station 410 and an oil return accumulator station 420. The oil inlet accumulator station 410 supplements the flow through the hydraulic pump station 300, can complete instantaneous large flow output, and realize high-speed impact. The oil return accumulator station 420 has the function of stabilizing the voltage and eliminating the circuit pulse impact. An oil inlet accumulator pipeline 430 is arranged between the oil inlet accumulator station 410 and the valve block 110. An oil inlet accumulator channel 115 is arranged in the valve block 110. The oil inlet accumulator pipeline 430 is connected to the oil inlet accumulator channel 115, and the oil flowing out of the oil return accumulator station 420 flows back to the hydraulic pump station 300 through the oil return pipeline.

[0039] The control device 500 includes a controller and a solenoid valve. The controller is used to send horizontal and vertical signals to the solenoid valve. The solenoid valve is used to control the operation of the first cylinder 120 and the second cylinder 130, specifically to control the selection of the oil inlets of the first cylinder 120 and the second cylinder 130, thereby achieving the blocking and conduction of the oil circuits of the first cylinder 120 and the second cylinder 130.

[0040] The horizontal vibration device 600 can meet the low-frequency and large-displacement lateral vibration requirements of a heavy-loaded and high-center-of-gravity specimen, and can also perform high-speed and high-acceleration vibration.

[0041] The vertical vibration device 700 can meet the low-frequency and large-displacement longitudinal vibration requirements of a heavy-loaded and high-center-of-gravity specimen, and can also perform high-speed and high-acceleration vibration.

[0042] The hydraulic pump station 300 supplies oil to the oil inlet channel 112 of the valve block 110 through the oil inlet main pipeline 310. When the control device 500 sends a horizontal signal to the large flow switching valve group 100, the oil circuit of the first oil cylinder 120 is connected and the oil circuit of the second oil cylinder 130 is blocked. Then, the oil flows to the horizontal oil inlet main pipeline 310 through the first oil outlet channel 113 to drive the horizontal vibration device 600 to operate. The oil flowing out of the horizontal oil return main pipeline of the horizontal vibration device 600 flows to The oil return main pipeline of the hydraulic pump station 300; when the control device 500 sends a vertical signal to the large-flow switching valve group 100, the oil circuit of the first oil cylinder 120 is blocked, and the oil circuit of the second oil cylinder 130 is connected, then the oil flows through the second oil outlet channel 114 to the vertical oil inlet main pipeline 310 to drive the vertical vibration device 700 to operate, and the oil flowing out of the vertical oil return main pipeline of the vertical vibration device 700 flows to the oil return main pipeline of the hydraulic pump station 300, realizing the function of double switching of the oil circuit.

[0043] The large flow switching valve group 100 and the vibration test system provided by the utility model adopt the solenoid valve switching to drive the first oil cylinder 120 and the second oil cylinder 130 to switch the oil circuit. By means of double switching oil circuits, the large flow output function is met and the test cost is saved.

[0044] It should be understood that although this specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each implementation mode may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

[0045] The series of detailed descriptions listed above are only specific descriptions of feasible implementation methods of the utility model. They are not intended to limit the protection scope of the utility model. Any equivalent implementation methods or changes that do not deviate from the technical spirit of the utility model should be included in the protection scope of the utility model.

Claims

1. A large flow switching valve group, characterized in that: The invention comprises a valve block (110) and a first oil cylinder (120) arranged on the valve block (110); a sliding space (111), an oil inlet channel (112) and a first oil outlet channel (113) are arranged in the valve block (110); the oil inlet channel (112) is connected to the first oil outlet channel (113); and the sliding space (111) is connected to the first oil outlet channel (113); The first oil cylinder (120) comprises a first sleeve (121) and a second sleeve (122), a piston (123) and a piston rod (124) are arranged in the first sleeve (121), a first oil chamber (1211) is formed between the upper inner wall of the first sleeve (121) and the upper end surface of the piston (123), a second oil chamber (1212) is formed between the lower inner wall of the first sleeve (121) and the lower end surface of the piston (123), and a first oil inlet (1213) and a second oil inlet (1214) are arranged on the first sleeve (121), the first oil inlet (1213) is connected to the first oil chamber (1211), and the second oil inlet (1214) is connected to the second oil chamber (1212). 1212), a slide bar (125) is arranged in the second sleeve (122), the first sleeve (121), the second sleeve (122) and the sliding space (111) are arranged in sequence from top to bottom, the sliding space (111) cooperates with the slide bar (125), the slide bar (125) can slide in the second sleeve (122) and the sliding space (111), the piston rod (124) is connected to the slide bar (125), oil is injected into the first oil inlet (1213) or the second oil inlet (1214), and the piston rod (124) drives the slide bar (125) to move upward or downward, thereby blocking or connecting the oil inlet channel (112) and the first oil outlet channel (113).

2. The large flow switching valve group according to claim 1 is characterized in that: A third oil chamber (1221) is formed between the upper inner wall of the second sleeve (122) and the upper end surface of the sliding rod (125), and a fourth oil chamber (1222) is formed between the lower inner wall of the second sleeve (122) and the lower end of the sliding rod (125). The third oil chamber (1221) and the fourth oil chamber (1222) maintain equal pressure, and the fourth oil chamber (1222) is connected to the first oil outlet channel (113).

3. The large flow switching valve group according to claim 2 is characterized in that: An isobaric tube (126) is provided between the third oil chamber (1221) and the fourth oil chamber (1222) for communication.

4. The large flow switching valve group according to claim 1 is characterized in that: The piston rod (124) and the sliding rod (125) are threadedly connected.

5. The large flow switching valve group according to claim 3 is characterized in that: A sealing gasket is provided at the connection between the fourth oil chamber (1222) and the first oil outlet channel (113).

6. The large flow switching valve group according to claim 5 is characterized in that: The sliding rod (125) comprises a sliding rod body (1251) and a spherical end portion (1252), and the sealing gasket is a spherical sealing gasket (127) matched with the spherical end portion (1252).

7. The large flow switching valve group according to claim 1 is characterized in that: A guide sleeve (128) is arranged inside the second sleeve (122), and the slide rod (125) can slide inside the guide sleeve (128). The guide sleeve (128) is used to guide the sliding of the slide rod (125).

8. A vibration test system, characterized in that: The invention comprises a vibration isolation foundation (200), a hydraulic pump station (300), an accumulator station, a control device (500), a horizontal vibration device (600), a vertical vibration device (700) and a large flow switching valve group (100) as described in any one of claims 1 to 7. A solenoid valve and a second oil cylinder (130) are also arranged on the valve block (110). The structure of the second oil cylinder (130) is consistent with that of the first oil cylinder (120). The first oil cylinder (120) is connected to the horizontal vibration device (600), and the second oil cylinder (130) is connected to the vertical vibration device (700). The control device (500) is used to send horizontal and vertical signals to the large flow switching valve group (100) to control the operation of the first oil cylinder (120) and the second oil cylinder (130).

9. The vibration test system according to claim 8, characterized in that: The valve block (110) is also provided with a second oil outlet channel (114); the first oil outlet channel (113) is connected to the horizontal vibration device (600), and the second oil outlet channel (114) is connected to the vertical vibration device (700).

10. The vibration test system according to claim 8, characterized in that: The accumulator station comprises an oil inlet accumulator station (410) and an oil return accumulator station (420); an oil inlet accumulator pipeline (430) is provided between the oil inlet accumulator station (410) and the valve block (110); an oil inlet accumulator channel (115) is provided in the valve block (110); and the oil inlet accumulator pipeline (430) is connected to the oil inlet accumulator channel (115).

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