Air tightness detection device for oil tank of hydraulic station

Abstract

The utility model relates to an air tightness detection device for an oil tank of a hydraulic station, which comprises a rack, and a positioning mechanism and an immersion mechanism which are arranged in the rack and are matched with each other, the positioning mechanism comprises a top plate transversely fixed to the top of the rack, a first lifting air cylinder fixed to the top of the top plate, a supporting plate transversely arranged below the top plate, a pressing plate transversely arranged between the top plate and the supporting plate, a plurality of connecting columns vertically arranged in the pressing plate in a penetrating mode, a base plate fixed to the bottom of the pressing plate and a plurality of pressing blocks fixed to the bottom of the base plate. The base is arranged at the top of the supporting plate; according to the utility model, the oil tank can be automatically positioned and the holes of the oil tank can be automatically sealed before detection, and the oil tank can be automatically placed into the detection box for air tightness detection without manual operation, so that the operation of the whole process is simplified, the working efficiency is improved, and time and labor are saved.

Description

Technical Field

[0001] The utility model relates to an air tightness detection device for an oil tank of a hydraulic station. Background Art

[0002] The main task of the hydraulic station is to convert power from one form to another. It has the characteristics of wide application, high efficiency and simple structure. The hydraulic station is composed of a hydraulic pump, a driving motor, an oil tank, a directional valve, a throttle valve, a relief valve, etc. The oil tank of the hydraulic station is a container for storing the oil required to ensure the operation of the hydraulic system. In order to install related accessories (such as: quick refueling connectors, air filters, thermometers, oil level gauges, oil suction self-sealing devices, boxes, drain valves) and connect oil pipes, it is necessary to set multiple holes on the outer wall of the oil tank. Since the oil tank is welded by metal materials, the circumferential weld between the bottom and the side wall of the oil tank is easily welded. If the welding is not in place and a complete seal is not achieved, the oil tank must be tested for air tightness after welding. However, when performing air tightness testing on existing oil tanks, most of them are done manually. That is, the operator first plugs each hole in turn with a matching sealing plug, then uses a lifting tool to lift the oil tank to the top of the testing box, and finally uses the lifting tool to place the oil tank into the testing box and fill the tank with pressurized gas for testing. After the test is completed, the oil tank is lifted out of the testing box. Therefore, the operation of the whole process is relatively cumbersome, and each step is inseparable from manual operation, so the work efficiency is low, and it is time-consuming and labor-intensive, which needs to be further improved. Utility Model Content

[0003] In view of the current status of the above-mentioned prior art, the technical problem to be solved by the present invention is to provide an air tightness detection device for a hydraulic station oil tank, which simplifies the operation to improve the work efficiency and saves both time and manpower.

[0004] The technical solution adopted by the present invention to solve the above-mentioned technical problems is: an air tightness detection device for the oil tank of a hydraulic station, characterized in that it includes a frame and a positioning mechanism and an immersion mechanism arranged inside the frame and cooperating with each other, the positioning mechanism includes a top plate fixed horizontally on the top of the frame, a first lifting cylinder fixed on the top of the top plate, a support plate arranged horizontally below the top plate, a pressure plate arranged horizontally between the top plate and the support plate, a plurality of connecting columns vertically inserted in the pressure plate, a seat plate fixed at the bottom of the pressure plate, a plurality of pressure blocks fixed at the bottom of the seat plate, and a base arranged at the top of the support plate, the telescopic end of the first lifting cylinder vertically downwardly passes through the top plate and is fixed to the top of the pressure plate, and the upper and lower ends of each of the connecting columns are respectively fixed to the top plate and the support plate.

[0005] The positioning mechanism also includes a first auxiliary device and a second auxiliary device respectively arranged on the left and right sides of the base, and a third auxiliary device arranged at the rear of the base. The first auxiliary device includes a first bracket fixed on the top of the support plate, a first auxiliary cylinder fixed on the first bracket, a first side plate vertically fixed on the telescopic end of the first auxiliary cylinder and located on the left side of the base, and a plurality of first sealing pins laterally fixed on the right outer wall of the first side plate; the telescopic end of the first auxiliary cylinder is arranged laterally to the right.

[0006] The second auxiliary device includes a second bracket fixed on the top of the support plate, a second auxiliary cylinder fixed on the second bracket, a second side plate vertically fixed on the telescopic end of the second auxiliary cylinder and located on the right side of the base, and a plurality of second sealing pins laterally fixed on the left outer wall of the second side plate; the telescopic end of the second auxiliary cylinder is set laterally to the left.

[0007] The third auxiliary device includes a third bracket and a fourth bracket fixed on the top of the support plate and arranged on the left and right respectively, a third auxiliary cylinder fixed on the third bracket, a third sealing pin fixed on the telescopic end of the third auxiliary cylinder, a fourth auxiliary cylinder fixed on the fourth bracket, and a fifth sealing pin fixed on the telescopic end of the fourth auxiliary cylinder. The telescopic end of the third auxiliary cylinder is arranged horizontally forward, and the telescopic end of the fourth auxiliary cylinder is arranged inclined forward and downward.

[0008] The immersion mechanism includes an inspection box that is movably connected to the frame to have a vertical movement function and is located under the pallet, and two second lifting cylinders that are symmetrically arranged on the left and right sides of the inspection box. The fixed ends of the two second lifting cylinders are fixed on the frame, and the telescopic ends of the two second lifting cylinders are vertically upward and fixed on the left and right sides of the inspection box.

[0009] Preferably, the base includes two limit plates vertically fixed on the top of the support plate and symmetrically arranged on the left and right, a baffle vertically fixed between the two limit plates, a movable plate horizontally and movably connected between the two limit plates and located in front of the baffle, and a bottom plate horizontally fixed on the top of the movable plate, and a positioning cavity is opened on the top of the bottom plate.

[0010] Preferably, the base also includes a guide unit and a support unit which are respectively arranged in the front and rear and are both located between the two limit plates. The guide unit includes a plurality of guide combinations which are arranged in sequence from left to right. Correspondingly, the support unit includes the same number of support combinations which are arranged in sequence from left to right. Each of the support combinations is arranged behind a corresponding guide unit.

[0011] Preferably, the guide assembly includes a wheel frame fixed to the top of the support plate and a plurality of guide wheels rotatably connected to the wheel frame and arranged sequentially from front to back, and the upper part of each guide wheel is at the same height and higher than the top of the wheel frame.

[0012] Preferably, the support combination includes a heightening block fixed to the top of the support plate and two sliders arranged laterally above the heightening block and symmetrically distributed up and down, the upper slider is fixed to the bottom of the movable plate, and the lower slider is fixed to the top of the heightening block.

[0013] Preferably, the second auxiliary device further comprises a tightening cylinder fixed on the second bracket and a tightening head fixed on the telescopic end of the tightening cylinder, and the telescopic end of the tightening cylinder is arranged laterally to the left.

[0014] Preferably, a buffer unit is provided between the telescopic end of each second lifting cylinder and the inspection box, and the buffer unit includes a traction frame fixed on the inspection box, a guide column vertically fixed on the traction frame, a base fixed on the telescopic end of the second lifting cylinder, and a spring provided between the base and the traction frame; a guide sleeve is formed upward at the end of the base, the lower end of the guide column is movably inserted into the guide sleeve, the lower end of the spring is sleeved outside the guide sleeve and pressed against the end of the base, and the upper end of the spring is pressed against the traction frame.

[0015] Compared with the existing technology, the advantages of the present invention are: the present invention can automatically complete the positioning of the fuel tank and the sealing of the fuel tank holes before testing, and can automatically place the fuel tank into the inspection box for air tightness testing without manual work, thereby simplifying the operation of the entire process to improve work efficiency, and saving both time and labor. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a left front structural diagram of the utility model;

[0017] Figure 2 It is the right front side structural diagram of the utility model;

[0018] Figure 3 This is a structural diagram of the left front side of the buffer unit of the present invention;

[0019] Figure 4 This is a partial enlarged structural diagram of the utility model at point A;

[0020] Figure 5 This is a partial enlarged structural diagram of the utility model at point B. DETAILED DESCRIPTION

[0021] Unless otherwise defined, the technical or scientific terms used in this utility model shall have the usual meanings understood by persons of ordinary skill in the field to which this utility model belongs. The words "first", "second" and similar terms used in this utility model do not indicate any order, quantity or importance, but are only used to distinguish different components. Words such as "include" or "comprise" mean that the elements or objects appearing before the word include the elements or objects listed after the word and their equivalents, without excluding other elements or objects. Words such as "connect" or "connected" are not limited to physical or mechanical connections, but may include electrical connections, whether direct or indirect. "Up", "down", "left", "right" and the like are only used to indicate relative positional relationships. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0022] In order to keep the following description of the embodiments of the present invention clear and concise, the present invention omits detailed descriptions of known functions and known components.

[0023] like Figures 1 to 5 As shown, a hydraulic station oil tank air tightness detection device includes a frame 1 and a positioning mechanism 2 and an immersion mechanism 3 arranged inside the frame 1 and cooperating with each other, the positioning mechanism 2 includes a top plate 21 fixed horizontally on the top of the frame 1, a first lifting cylinder 219 fixed on the top of the top plate 21, a support plate 23 arranged horizontally below the top plate 21, a pressure plate 22 arranged horizontally between the top plate 21 and the support plate 23, a plurality of connecting columns 24 vertically inserted in the pressure plate 22, a seat plate 25 fixed at the bottom of the pressure plate 22, a plurality of pressure blocks 26 fixed at the bottom of the seat plate 25, and a base 220 arranged at the top of the support plate 23, the telescopic end of the first lifting cylinder 219 vertically downwardly passes through the top plate 21 and is fixed to the top of the pressure plate 22, and the upper and lower ends of each connecting column 24 are respectively fixed on the top plate 21 and the support plate 23.

[0024] The positioning mechanism 2 also includes a first auxiliary device and a second auxiliary device respectively arranged on the left and right sides of the base 220, and a third auxiliary device arranged at the rear of the base 220. The first auxiliary device includes a first bracket 222 fixed on the top of the support plate 23, a first auxiliary cylinder 221 fixed on the first bracket 222, a first side plate 211 vertically fixed on the telescopic end of the first auxiliary cylinder 221 and located on the left side of the base 220, and a plurality of first sealing pins 212 laterally fixed on the right outer wall of the first side plate 211; the telescopic end of the first auxiliary cylinder 221 is laterally set to the right.

[0025] The second auxiliary device includes a second bracket 27 fixed on the top of the support plate 23, a second auxiliary cylinder 28 fixed on the second bracket 27, a second side plate 29 vertically fixed on the telescopic end of the second auxiliary cylinder 28 and located on the right side of the base 220, and a plurality of second sealing pins 210 laterally fixed on the left outer wall of the second side plate 29; the telescopic end of the second auxiliary cylinder 28 is set laterally to the left.

[0026] The second auxiliary device further includes a tightening cylinder 217 fixed on the second bracket 27 and a tightening head 218 fixed on the telescopic end of the tightening cylinder 217. The telescopic end of the tightening cylinder 217 is arranged horizontally to the left.

[0027] The third auxiliary device includes a third bracket 223 and a fourth bracket 224 fixed on the top of the support plate 23 and arranged on the left and right respectively, a third auxiliary cylinder 213 fixed on the third bracket 223, a third sealing pin 214 fixed on the telescopic end of the third auxiliary cylinder 213, a fourth auxiliary cylinder 215 fixed on the fourth bracket 224, and a fifth sealing pin 216 fixed on the telescopic end of the fourth auxiliary cylinder 215. The telescopic end of the third auxiliary cylinder 213 is set horizontally forward, and the telescopic end of the fourth auxiliary cylinder 215 is set inclined forward and downward.

[0028] The immersion mechanism 3 includes an inspection box 31 movably connected to the frame 1 to have a vertical movement function and located under the pallet 23, and two second lifting cylinders 32 symmetrically arranged on the left and right sides of the inspection box 31. The fixed ends of the two second lifting cylinders 32 are fixed on the frame 1, and the telescopic ends of the two second lifting cylinders 32 are vertically upward and fixed on the left and right sides of the inspection box 31 respectively.

[0029] The base 220 includes two limit plates 2201 vertically fixed on the top of the support plate 23 and symmetrically arranged on the left and right, a baffle 2202 vertically fixed between the two limit plates 2201, a movable plate 2203 horizontally and movably connected between the two limit plates 2201 and located in front of the baffle 2202, and a bottom plate 2204 horizontally fixed on the top of the movable plate 2203. A positioning cavity 22041 is provided on the top of the bottom plate 2204.

[0030] The base 220 also includes a guide unit and a support unit which are respectively arranged in the front and rear and are both located between the two limit plates 2201. The guide unit includes a plurality of guide combinations which are arranged in sequence from left to right. Correspondingly, the support unit includes the same number of support combinations which are arranged in sequence from left to right. Each support combination is arranged behind a corresponding guide unit.

[0031] The guide assembly includes a wheel frame 2205 fixed on the top of the support plate 23 and a plurality of guide wheels 2206 rotatably connected to the wheel frame 2205 and arranged in sequence from front to back. The upper part of each guide wheel 2206 is at the same height and higher than the top of the wheel frame 2205.

[0032] The support combination includes a raising block 2207 fixed on the top of the support plate 23 and two sliders 2208 arranged laterally above the raising block 2207 and symmetrically distributed up and down. The upper slider 2208 is fixed on the bottom of the movable plate 2203, and the lower slider 2208 is fixed on the top of the raising block 2207.

[0033] A handle 2209 is also fixed to the front side of the movable plate 2203 .

[0034] A buffer unit is also provided between the telescopic end of each second lifting cylinder 32 and the inspection box 31. The buffer unit includes a traction frame 36 fixed on the inspection box 31, a guide column 35 vertically fixed on the traction frame 36, a base 33 fixed on the telescopic end of the second lifting cylinder 32, and a spring 34 provided between the base 33 and the traction frame 36; a guide sleeve 331 is formed upward at the end of the base 33, and the lower end of the guide column 35 is movably inserted into the guide sleeve 331, the lower end of the spring 34 is sleeved outside the guide sleeve 331 and pressed against the end of the base 33, and the upper end of the spring 34 is pressed against the traction frame 36.

[0035] A main convex ring 2111 is formed outwardly on the right outer wall of the first side plate 211 , and a plurality of side convex rings 2112 are formed between the outer peripheral surface of the main convex ring 2111 and the right outer wall of the first side plate 211 .

[0036] Four guide rods 37 are also fixed vertically on the periphery of the inspection box 31 inside the frame 1. Correspondingly, four groove wheel combinations are provided on the outer wall of the inspection box 31, which respectively cooperate with the four guide rods 37. The groove wheel combination includes several groove wheels 38 arranged in sequence from top to bottom, and each groove wheel 38 is rolled and mounted on a corresponding guide rod 37.

[0037] Working principle:

[0038] Hold the handle 2209 with your hand and pull it forward to drive the movable plate 2203 and the base plate 2204 to move forward, so that the slider 2208 fixed at the bottom of the movable plate 2203 in each support combination moves to the top of the wheel frame 2205 in the corresponding guide combination and moves forward along the multiple guide wheels 2206 on the wheel frame 2205 to save time and effort; then, place the oil tank to be inspected on the top of the base plate 2204 and embed its bottom into the positioning cavity 22041 to complete the preliminary positioning; finally, push the movable plate 2203 backward to drive the oil tank to move to the right until the back side of the movable plate 2203 is against the baffle 2202. At this time, the slider 2208 fixed at the bottom of the movable plate 2203 in each support combination is attached to the top of the slider 2208 fixed on the top of the raising block 2207 in the same support combination.

[0039] The telescopic end of the first lifting cylinder 219 is driven to extend outward to drive the multiple pressing blocks 26 to move downward with the help of the pressing plate 22 and the seat plate 25 until the end of each pressing block 26 is pressed tightly against the top of the oil tank; then the telescopic end of the first auxiliary cylinder 221 in the first auxiliary device is driven to extend outward to drive the first side plate 211 to move rightward until the right outer wall of the first side plate 211 is attached to the left outer wall of the oil tank, thereby making the main convex ring 2111 and each side convex ring 2112 embedded in the corresponding countersunk ring on the left outer wall of the oil tank. The hole plays both a positioning and a sealing role; at the same time, the telescopic end of the second auxiliary cylinder 28 in the second auxiliary device is driven to extend outward to drive the second side plate 29 to move to the left, until the second sealing pins 210 located on the second side plate 29 are all inserted into the corresponding through holes on the right outer wall of the fuel tank to play both a positioning and a sealing role; at the same time, the telescopic end of the tightening cylinder 217 needs to be driven to extend outward to drive the tightening head 218 to move to the left, until the end of the tightening head 218 is pressed against the right outer wall of the fuel tank.

[0040] Next, the telescopic end of the third auxiliary cylinder 213 in the third auxiliary device is driven to extend outward to drive the third sealing pin 214 to move forward until the end of the third sealing pin 214 is pressed against the rear outer wall of the oil tank; at the same time, the telescopic end of the fourth auxiliary cylinder 215 is driven to extend outward to drive the fifth sealing pin 216 to move tilted forward and downward until the end of the fifth sealing pin 216 is tilted and pressed against the inclined surface on the rear outer wall of the oil tank.

[0041] Next, a certain amount of water is filled into the inspection box 31, and the telescopic ends of the two second lifting cylinders 32 in the immersion mechanism 3 are driven to extend outward to drive the inspection box 31 to move vertically upward, so that the support plate 23 enters the interior of the inspection box 31 through the top opening of the inspection box 31 until the bottom of the tank is completely immersed in water; then, pressurized gas is filled into the tank through the pipe through the joint set at the top of the tank, and the pressure is maintained after reaching a certain pressure value, and then the water in the inspection box 31 is observed to see if there are bubbles. to check the air tightness of the welding position at the bottom of the oil tank; after the inspection is completed, turn off the input of the pressurized gas and remove the joint for air intake, and then drive the telescopic ends of the two second lifting cylinders 32 in the immersion mechanism 3 to retract inward to drive the inspection box 31 to move down to the bottom in the same way so that the oil tank leaves the inspection box 31, and finally operate the fourth auxiliary cylinder 215, the third auxiliary cylinder 213, the second auxiliary cylinder 28, the first auxiliary cylinder 221 and the first lifting cylinder 219 in reverse order in the same way and remove the oil tank after the operation.

[0042] The utility model can not only automatically complete the positioning of the fuel tank and the sealing of the fuel tank holes before testing, but also automatically place the fuel tank into the inspection box 31 for air tightness testing without manual work, thereby simplifying the operation of the entire process to improve work efficiency, and saving both time and labor.

[0043] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present invention, rather than to limit it. Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or make equivalent replacements for some of the technical features therein. However, these modifications or replacements do not deviate the essence of the corresponding technical solutions from the spirit and scope of the technical solutions of the various embodiments of the present invention.

Claims

1. An air tightness detection device for a hydraulic station oil tank, characterized in that: It includes a frame and a positioning mechanism and an immersion mechanism arranged inside the frame and cooperating with each other, the positioning mechanism includes a top plate fixed horizontally on the top of the frame, a first lifting cylinder fixed on the top of the top plate, a support plate arranged horizontally below the top plate, a pressing plate arranged horizontally between the top plate and the support plate, a plurality of connecting columns vertically inserted in the pressing plate, a seat plate fixed at the bottom of the pressing plate, a plurality of pressing blocks fixed at the bottom of the seat plate, and a base arranged at the top of the support plate, the telescopic end of the first lifting cylinder vertically passes through the top plate downward and is fixed to the top of the pressing plate, and the upper and lower ends of each of the connecting columns are respectively fixed to the top plate and the support plate; The positioning mechanism also includes a first auxiliary device and a second auxiliary device respectively arranged on the left and right sides of the base, and a third auxiliary device arranged at the rear of the base, the first auxiliary device includes a first bracket fixed to the top of the support plate, a first auxiliary cylinder fixed to the first bracket, a first side plate vertically fixed to the telescopic end of the first auxiliary cylinder and located on the left side of the base, and a plurality of first sealing pins transversely fixed to the right outer wall of the first side plate; the telescopic end of the first auxiliary cylinder is transversely arranged to the right; The second auxiliary device comprises a second bracket fixed on the top of the support plate, a second auxiliary cylinder fixed on the second bracket, a second side plate vertically fixed on the telescopic end of the second auxiliary cylinder and located on the right side of the base, and a plurality of second sealing pins transversely fixed on the left outer wall of the second side plate; the telescopic end of the second auxiliary cylinder is transversely arranged to the left; The third auxiliary device includes a third bracket and a fourth bracket fixed to the top of the support plate and respectively arranged on the left and right sides, a third auxiliary cylinder fixed to the third bracket, a third sealing pin fixed to the telescopic end of the third auxiliary cylinder, a fourth auxiliary cylinder fixed to the fourth bracket, and a fifth sealing pin fixed to the telescopic end of the fourth auxiliary cylinder, the telescopic end of the third auxiliary cylinder is arranged transversely forward, and the telescopic end of the fourth auxiliary cylinder is arranged obliquely forward and downward; The immersion mechanism includes an inspection box that is movably connected to a frame to have a vertical movement function and is located under a pallet, and two second lifting cylinders that are symmetrically arranged on the left and right sides of the inspection box, the fixed ends of the two second lifting cylinders are fixed to the frame, and the telescopic ends of the two second lifting cylinders are vertically arranged upward and are respectively fixed on the left and right sides of the inspection box.

2. The air tightness detection device for a hydraulic station oil tank according to claim 1, characterized in that: The base includes two limit plates vertically fixed on the top of the support plate and symmetrically arranged on the left and right, a baffle plate vertically fixed between the two limit plates, a movable plate laterally and movably connected between the two limit plates and located in front of the baffle plate, and a bottom plate laterally fixed on the top of the movable plate, and a positioning cavity is opened on the top of the bottom plate.

3. The air tightness detection device for the oil tank of a hydraulic station according to claim 2, characterized in that: The base also includes a guide unit and a support unit which are respectively arranged front and back and are located between two limit plates. The guide unit includes a plurality of guide assemblies which are arranged in sequence from left to right. Correspondingly, the support unit includes the same number of support assemblies which are arranged in sequence from left to right. Each of the support assemblies is arranged behind a corresponding guide unit.

4. The air tightness detection device for the oil tank of a hydraulic station according to claim 3, characterized in that: The guide assembly includes a wheel frame fixed on the top of the support plate and a plurality of guide wheels rotatably connected to the wheel frame and arranged sequentially from front to back, and the upper part of each guide wheel is of the same height and higher than the top of the wheel frame.

5. The air tightness detection device for the oil tank of a hydraulic station according to claim 4, characterized in that: The support assembly includes a heightening block fixed on the top of the support plate and two sliders arranged laterally above the heightening block and symmetrically distributed up and down, the upper slider is fixed on the bottom of the moving plate, and the lower slider is fixed on the top of the heightening block.

6. The air tightness detection device for a hydraulic station oil tank according to claim 1, characterized in that: The second auxiliary device also includes a tightening cylinder fixed on the second bracket and a tightening head fixed on the telescopic end of the tightening cylinder, and the telescopic end of the tightening cylinder is arranged horizontally to the left.

7. The air tightness detection device for a hydraulic station oil tank according to claim 1, characterized in that: A buffer unit is also provided between the telescopic end of each second lifting cylinder and the inspection box, and the buffer unit includes a traction frame fixed on the inspection box, a guide column vertically fixed on the traction frame, a base fixed on the telescopic end of the second lifting cylinder, and a spring provided between the base and the traction frame; a guide sleeve is formed upward at the end of the base, the lower end of the guide column is movably inserted into the guide sleeve, the lower end of the spring is sleeved outside the guide sleeve and pressed against the end of the base, and the upper end of the spring is pressed against the traction frame.

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