Airtightness testing device for hydraulic oil tank of excavator

Abstract

The utility model discloses an excavator hydraulic oil tank air tightness testing device which comprises a testing table, the left side of the top of the testing table is fixedly connected with a fixing shell, an inner cavity of the testing table is provided with a sealing assembly, the sealing assembly comprises a propelling head, and the bottom of the propelling head is fixedly connected with a conical sealing sleeve. The surface of the propelling head is sleeved with a slidable sealing cover, and the surface of the propelling head is sleeved with a spring. According to the utility model, the propelling assembly and the fixing shell are used in cooperation to vertically propel the air pressure sensor, then the sealing assembly is arranged to carry out double sealing processing on the oil port of the hydraulic oil tank, and finally the air pump and the air supply pipe are used in cooperation to inflate air into the inner cavity of the hydraulic oil tank. Through cooperative use of the air pressure detector and the air pressure sensor, the air pressure in the inner cavity of the hydraulic oil tank is monitored, and the purpose that the monitoring result of the double-channel high-sealing box is accurate can be achieved.

Description

TECHNICAL FIELD

[0001] The utility model belongs to hydraulic oil tank test technical field, in particular, relate to a kind of excavator hydraulic oil tank air tightness testing device. BACKGROUND

[0002] Hydraulic oil tank is an important component in hydraulic system, mainly used to store hydraulic oil, air tight test is a kind of test method for detecting the sealing property of the sealing structure of container, pipeline system, product shell etc., it is mainly through the gas (usually air or nitrogen) of certain pressure applied to the inside or outside of the object to be tested, then monitor whether gas leaks and the extent of leakage, to judge the air tightness of the object to be tested.

[0003] When the air tightness of excavator hydraulic oil tank is tested, the air inlet position needs to be sealed, to prevent the leakage of test gas, however, simple plugging method is used to seal the oil tank oil port, and air leakage is prone to occur, resulting in inaccurate test results, and the air tightness of the oil tank cannot be truly reflected, which will interfere with the test results, affect the accurate judgment of the air tightness of hydraulic oil tank, therefore, excavator hydraulic oil tank air tightness testing device is needed, which adopts the way of reverse propulsion, double sealing treatment is carried out on the air inlet position, to prevent leakage of air inlet position, and under the cooperation of air inlet structure and air pressure detection structure, the air pressure in hydraulic oil tank is monitored, so as to test the air tightness of the oil tank. UTILITY MODEL CONTENTS

[0004] The utility model aims at providing a kind of excavator hydraulic oil tank air tightness testing device, adopts the way of reverse propulsion, double sealing treatment is carried out on the air inlet position, to prevent leakage of air inlet position, and under the cooperation of air inlet structure and air pressure detection structure, the air pressure in hydraulic oil tank is monitored, so as to test the air tightness of the oil tank, to solve the above technical problems.

[0005] The utility model discloses a technical scheme that solves the above technical problem is as follows: a kind of excavator hydraulic oil tank air tightness testing device, including test table: the left side fixedly connected with fixed shell in the top of test table, the inner chamber of test table is provided with sealing assembly, sealing assembly includes push head, the bottom fixedly connected with conical seal sleeve of push head, the surface of push head is equipped with the seal cover that can slide, the surface of push head is equipped with spring, the top end and bottom end of spring are respectively welded with push head and seal cover, the bottom of inner wall of seal cover is embedded with sealing ring, the right side fixedly installed with air pressure detector in the top of test table, the bottom fixedly connected with air pressure sensor of push head, air pressure detector and air pressure sensor are electrically connected, the inner chamber fixedly connected with gas supply pipe of push head, the rear side fixedly installed with air pump in the top of test table, the bottom end of gas supply pipe is penetrated to the bottom of push head, the rear end of gas supply pipe is connected with the air outlet end of air pump, the inner chamber of fixed shell is provided with push assembly.

[0006] Preferably, the right end of the rear side of the test table is fixedly installed with an electric telescopic rod, and a slidable extrusion rod is penetrated and arranged at the center of the top of the test table, and the top end of the extrusion rod is fixedly connected with the output end of the electric telescopic rod.

[0007] Preferably, the push assembly comprises a limiting pipe fixedly connected in the inner chamber of the fixed shell, a tooth column is welded at the top of the push head, and a gear wheel is rotatably connected at the left side of the inner chamber of the fixed shell, and the gear wheel is engaged with the tooth column.

[0008] Preferably, the rear end of the gear wheel is penetrated to the rear side of the fixed shell and is fixedly connected with a worm wheel, and a worm is rotatably connected at the top of the rear side of the test table, and the worm is engaged with the worm wheel.

[0009] Preferably, the top of the tooth column is penetrated to the inner chamber of the limiting pipe, and the tooth column is slidably connected with the limiting pipe.

[0010] Preferably, the left end of the worm is fixedly connected with a rotating disc.

[0011] The utility model discloses the beneficial effect is:

[0012] 1、 the utility model discloses a push assembly and the cooperation of fixed shell are used to push vertically to air pressure sensor, then the setting of sealing assembly is handled to the double sealing of hydraulic oil tank oil port, finally the cooperation of air pump and gas supply pipe is used to fill gas in the inner chamber of hydraulic oil tank, the cooperation of air pressure detector and air pressure sensor is used to monitor the air pressure in the inner chamber of hydraulic oil tank, can reach the purpose of double high sealing box monitoring result accurate;

[0013] 2. The utility model discloses a squeeze limiting effect to the hydraulic oil tank through the cooperation of electric telescopic link and extruding rod, makes the hydraulic oil tank steady and place in the inner chamber of test table, thereby improved the stability of hydraulic oil tank in the testing process.

[0014] 3. The utility model discloses a vertical pushing effect to the pushing head through the cooperation of gear column and gear of the setting of pushing assembly, makes the barometer sensor can accurately enter the inner chamber of hydraulic oil tank, and under the cooperation of worm wheel and worm, drive rotation effect to gear is also carried out locking effect to gear simultaneously, makes gear column can steadily push to the specified position. BRIEF DESCRIPTION OF DRAWINGS

[0015] Among them:

[0016] Figure 1 It is the three-dimensional schematic view of one embodiment of the utility model;

[0017] Figure 2 It is one embodiment of the utility model Figure 1 The local enlarged view of A point in one embodiment of the utility model;

[0018] Figure 3 It is the three-dimensional schematic view of sealing assembly and pushing assembly of one embodiment of the utility model;

[0019] Figure 4 It is the three-dimensional explosion view of sealing assembly and pushing assembly of one embodiment of the utility model.

[0020] In the drawing, the component list that each sign represents is as follows:

[0021] 1, test table, 2, fixed shell, 3, barometer detector, 4, sealing assembly, 41, pushing head, 42, conical sealing sleeve, 43, sealing cover, 44, spring, 45, sealing ring, 5, barometer sensor, 6, gas supply pipe, 7, air pump, 8, pushing assembly, 81, limit tube, 82, gear column, 83, gear, 84, worm wheel, 85, worm, 9, electric telescopic link, 10, rotating disc, 11, extruding rod. DETAILED DESCRIPTION

[0022] In the following, the embodiment of the hydraulic oil tank air tightness testing device of the utility model will be described with reference to the drawings.

[0023] Figures 1-4The utility model discloses a kind of excavator hydraulic oil tank air-tightness testing devices of embodiment, including test table 1, electric telescopic rod 9 is fixedly installed in the right end of the rear side of test table 1, slidable extrusion rod 11 is penetrated and arranged in the center of the top of test table 1, the top end of extrusion rod 11 is fixedly connected with the output end of electric telescopic rod 9, by the cooperation of electric telescopic rod 9 and extrusion rod 11, extrusion limiting effect is played to hydraulic oil tank, so that hydraulic oil tank is stably placed in the inner cavity of test table 1, to improve the stability of hydraulic oil tank in testing process, fixed shell 2 is fixedly connected in the left side of the top of test table 1, the inner cavity of test table 1 is provided with sealing assembly 4, sealing assembly 4 includes push head 41, push head 41 is fixedly connected with conical sealing sleeve 42 in the bottom, push head 41 is equipped with slidable sealing cover 43, push head 41 is equipped with spring 44, the top end and bottom end of spring 44 are respectively welded with push head 41 and sealing cover 43, sealing ring 45 is embedded in the bottom of the inner wall of sealing cover 43, air pressure detector 3 is fixedly installed in the right side of the top of test table 1, push head 41 is fixedly connected with air pressure sensor 5 in the bottom, air pressure detector 3 is electrically connected with air pressure sensor 5, push head 41 is fixedly connected with gas supply pipe 6 in the inner cavity, air pump 7 is fixedly installed in the rear side of the top of test table 1, the bottom end of gas supply pipe 6 is penetrated to the bottom of push head 41, the rear end of gas supply pipe 6 is connected with the air outlet end of air pump 7, the inner cavity of fixed shell 2 is provided with push assembly 8, push assembly 8 includes limit pipe 81 fixedly connected in the inner cavity of fixed shell 2, the top of push head 41 is welded with tooth column 82, gear wheel 83 is rotatably connected in the left side of the inner cavity of fixed shell 2, gear wheel 83 is engaged with tooth column 82, the rear end of gear wheel 83 is penetrated to the rear side of fixed shell 2 and is fixedly connected with worm gear 84, worm 85 is rotatably connected in the top of the rear side of test table 1, worm 85 is engaged with worm gear 84, the top of tooth column 82 is penetrated to the inner cavity of limit pipe 81, tooth column 82 is slidably connected with limit pipe 81, rotating disc 10 is fixedly connected with the left end of worm 85, by the setting of push assembly 8, wherein the cooperation of tooth column 82 and gear wheel 83 plays vertical pushing effect to push head 41, so that air pressure sensor 5 can accurately enter the inner cavity of hydraulic oil tank, simultaneously under the cooperation of worm gear 84 and worm 85, gear wheel 83 is driven to rotate while also playing locking effect to gear wheel 83, so that tooth column 82 can be stably pushed to specified position.

[0024] Working principle: the utility model for use, the user through the hydraulic oil tank is placed in the bottom of test table 1 inner chamber, then moves the hydraulic oil tank position, so that sealing cover 43 and the oil port of hydraulic oil tank align, then the user rotates the rotating disc 10, the rotating disc 10 is driven by the worm 85 to rotate in the process of rotating, because the worm 85 and the worm wheel 84 are in the meshing transmission state, so that the gear 83 rotates in the inner chamber of fixed shell 2, the tooth column 82 drives the tooth column 82 in the inner chamber of self-limiting tube 81 vertically downward in the process of rotating, further make the propulsion head 41 and sealing cover 43 can occur displacement downward, until sealing cover 43 is engaged in the oil port surface of hydraulic oil tank, open the electric telescopic rod 9, the electric telescopic rod 9 drives the extrusion rod 11 to slide downward, so that the bottom of extrusion rod 11 is pressed in the surface of hydraulic oil tank, extrusion fixing of hydraulic oil tank, then the user rotates the rotating disc 10 again, so that the tooth column 82 continues to advance the propulsion head 41, so that sealing cover 43 drives sealing ring 45 to be tightly pressed in the surface of hydraulic oil tank oil port, simultaneously make the air pressure sensor 5 enter the oil port of hydraulic oil tank, the surface of conical sealing sleeve 42 and the oil port inner wall of hydraulic oil tank are in close contact, at this time, open the air pump 7, and through the use of the cooperation of propulsion assembly 8, the inner chamber of hydraulic oil tank is inflated and pressurized, simultaneously through the air pressure detector 3 and air pressure sensor 5, the air pressure change in the inner chamber of hydraulic oil tank is monitored.

[0025] In conclusion: the excavator hydraulic oil tank air tightness testing device, through the cooperation of propulsion assembly 8 and fixed shell 2, the air pressure sensor 5 is vertically advanced, then through the setting of sealing assembly 4, the hydraulic oil tank oil port is treated with double sealing, finally through the cooperation of air pump 7 and air pipe 6, the inner chamber of hydraulic oil tank is filled with gas, through the cooperation of air pressure detector 3 and air pressure sensor 5, the air pressure in the inner chamber of hydraulic oil tank is monitored, the purpose of double high sealing box monitoring result accurate is achieved.

Claims

1. A hydraulic oil tank air tightness testing device for a shovel, characterized by, The utility model provides a test platform, which comprises a test platform (1), a fixed shell (2) is fixedly connected to the left side of the top of the test platform (1), a sealing assembly (4) is arranged in the inner cavity of the test platform (1), the sealing assembly (4) comprises a propelling head (41), the bottom of the propelling head (41) is fixedly connected with a conical sealing sleeve (42), the surface of the propelling head (41) is sleeved with a slidable sealing cover (43), the surface of the propelling head (41) is sleeved with a spring (44), the top end and the bottom end of the spring (44) are welded with the propelling head (41) and the sealing cover (43) respectively, the bottom of the inner wall of the sealing cover (43) is embedded with a sealing ring (45), an air pressure detector (3) is fixedly installed on the right side of the top of the test platform (1), an air pressure sensor (5) is fixedly connected to the bottom of the propelling head (41), the air pressure detector (3) is electrically connected with the air pressure sensor (5), a gas supply pipe (6) is fixedly connected to the inner cavity of the propelling head (41), an air pump (7) is fixedly installed on the rear side of the top of the test platform (1), the bottom end of the gas supply pipe (6) penetrates to the bottom of the propelling head (41), the rear end of the gas supply pipe (6) is communicated with the air outlet end of the air pump (7), the inner cavity of the fixed shell (2) is provided with a propelling assembly (8).

2. The hydraulic oil tank air tightness testing device of claim 1, wherein, An electric telescopic rod (9) is fixedly installed on the right end of the rear side of the test platform (1), a slidable extrusion rod (11) is penetratingly arranged at the center of the top of the test platform (1), and the top end of the extrusion rod (11) is fixedly connected with the output end of the electric telescopic rod (9).

3. The hydraulic oil tank air tightness testing device of claim 2, wherein, The propelling assembly (8) comprises a limiting pipe (81) fixedly connected in the inner cavity of the fixed shell (2), a tooth column (82) welded on the top of the propelling head (41), and a gear wheel (83) rotatably connected to the left side of the inner cavity of the fixed shell (2) and engaged with the tooth column (82).

4. The hydraulic oil tank air tightness testing device of claim 3, wherein, The rear end of the gear wheel (83) penetrates to the rear side of the fixed shell (2) and is fixedly connected with a worm wheel (84), and a worm (85) is rotatably connected to the top of the rear side of the test platform (1) and engaged with the worm wheel (84).

5. The hydraulic oil tank air tightness testing device of claim 4, wherein, The top of the tooth column (82) penetrates to the inner cavity of the limiting pipe (81), and the tooth column (82) is slidingly connected with the limiting pipe (81).

6. The hydraulic oil tank air tightness testing device of claim 5, wherein, The left end of the worm (85) is fixedly connected with a rotating disc (10).

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