Leak-proof device for hydraulic oil cylinder

Abstract

The utility model relates to the technical field of hydraulic oil cylinders, and discloses a leakproof device for a hydraulic oil cylinder, which comprises a hydraulic oil cylinder barrel, a fixed sleeve plate fixedly sleeved in the middle of the hydraulic oil cylinder barrel, an air cylinder fixedly sleeved at one end of the fixed sleeve plate, an exhaust hole arranged at the top of the air cylinder, and a piston slidably connected in the air cylinder. A pull rod is fixedly connected to the middle of the top of the piston, the top of the pull rod penetrates through the inflator and is fixedly connected with a connecting plate, a second rack is fixedly connected to the bottom of the other end of the connecting plate, and a second one-way valve is fixedly connected to the bottom of the inflator and communicates with the bottom of the inflator. According to the hydraulic oil cylinder, when the piston rod shrinks, the descending speed of the piston is higher, the flow speed of airflow at the air nozzle is higher, the dust cleaning quality of the piston rod is improved, damage to the piston rod, an oil seal and the like is effectively avoided, the service life of the hydraulic oil cylinder is prolonged, and hydraulic oil leakage is avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic cylinder technical field especially relates to a kind of anti-leakage devices for hydraulic cylinder. BACKGROUND

[0002] In modern industrial field, hydraulic cylinder as a kind of key execution element, is widely used in various mechanical equipment, such as engineering machinery, mining machinery, metallurgical equipment and shipbuilding industry etc. It realizes linear reciprocating motion by converting hydraulic energy into mechanical energy, to drive working parts to complete various predetermined operation tasks, by searching, the patent with Chinese patent authorization No.CN219865697U discloses a kind of anti-leakage devices for hydraulic cylinder, relate to hydraulic cylinder field.A kind of anti-leakage devices for hydraulic cylinder, comprising: suction cylinder, fixedly installed on the side wall of hydraulic cylinder barrel;With piston's pull rod, slidingly connected in the suction cylinder;The upper end of the pull rod is fixedly connected with the top block of piston rod end portion connection;Annular gas tank, fixedly installed on the oil seal of hydraulic cylinder barrel upper end close to cylinder cover, the annular gas tank is set on the outer side of piston rod;The utility model can blow off dust attached on piston rod, avoid dust and oil seal contact, scratch piston rod and damage oil seal, so as to cause the leakage of hydraulic cylinder hydraulic oil, effectively improve the service life of hydraulic cylinder.

[0003] The anti-leakage device for hydraulic cylinder in the above patent has the following disadvantages: the device drives the movement of pull rod by the lifting of piston rod, so that the gas in the suction cylinder is sprayed out through the nozzle when the piston rod descends, but since the moving speed of piston rod of the oil cylinder is slow and synchronized with the speed of pull rod of the suction cylinder, the gas pressure of the sprayed gas is small, which is not convenient for discharging dust and other impurities, resulting in low practicality. Therefore, an anti-leakage device for hydraulic cylinder is designed. UTILITY MODEL CONTENTS

[0004] The utility model aims at solving the shortcomings in the prior art and proposes an anti-leakage device for hydraulic cylinder.

[0005] To achieve the above-mentioned purpose, the utility model adopts the following technical solutions:

[0006] The utility model provides a kind of hydraulic cylinder leak-proof device, including hydraulic cylinder barrel, fixed sleeve is equipped with fixed sleeve plate in the middle of the hydraulic cylinder barrel, one end of the fixed sleeve plate is fixedly sleeved with air cylinder, air cylinder top is provided with exhaust hole, the piston is slidably connected in the air cylinder, and the rubber sealing ring is fixedly connected to the circumference surface of the piston, the pull rod is fixedly connected to the top middle of the piston, and the connecting plate is fixedly connected to the pull rod top and penetrates the air cylinder, the second rack is fixedly connected to the other end bottom of the connecting plate, the second one-way valve is fixedly connected to the bottom of the air cylinder, and the second one-way valve is communicated with the bottom of the air cylinder, the dust cylinder is fixedly connected to the bottom of the air cylinder outer wall, and the filter screen is screwed to the bottom of the dust cylinder, gas in the air cylinder can be filtered, and dust cannot enter the inside of the air cylinder.

[0007] As a further scheme of the utility model, the hydraulic cylinder barrel top is fixedly connected with a sealing ring, and a piston rod is arranged in the middle of the sealing ring, and a top block is fixedly connected to the top of the piston rod.

[0008] As a further scheme of the utility model, the hydraulic cylinder barrel top circumference surface is fixedly connected with a plurality of connecting blocks, the same hollow ring block is fixedly connected to the top of the plurality of connecting blocks, a plurality of air jet nozzles are fixedly connected to the inside circumference surface of the hollow ring block at equal distances, and the plurality of air jet nozzles are communicated with the hollow ring block.

[0009] As a further scheme of the utility model, the air cylinder bottom two sides are fixedly connected with gas delivery pipes, the other ends of the two gas delivery pipes are fixedly connected to the hollow ring block and penetrate the fixed sleeve plate, the two sides of the fixed sleeve plate are provided with round holes matched with the gas delivery pipes, the first one-way valves are fixedly sleeved in the middle of the two gas delivery pipes, and the gas flow direction in the gas delivery pipe can only be from the air cylinder to the hollow ring block by the first one-way valve.

[0010] As a further scheme of the utility model, the top block bottom side close to the air cylinder is fixedly connected with two vertical bars, the same gear wheel is rotatably connected between the bottom of the two vertical bars, and the gear wheel is engaged with the second rack.

[0011] As a further scheme of the utility model, the hydraulic cylinder barrel outer wall side close to the second rack is fixedly connected with the first rack, and the first rack is engaged with the gear wheel, the lifting speed of the piston is faster than the speed of the piston rod by the second rack, the first rack and the gear wheel, so that the gas flow speed at the air jet nozzle is more rapid.

[0012] The utility model has the advantages that:

[0013] The utility model discloses: because adopt second rack, air cylinder gear, first rack, piston and hollow annular block etc. Technical means, through the cooperation of second rack, gear and first rack, make the speed of piston movement be much bigger than piston rod, make the gas pressure of air cylinder discharge be bigger, it is convenient to discharge the dust at piston rod place, effectively solve the problem in background art, and then realize the piston rod contraction time, the speed of piston drop is faster, make the airflow velocity at air jet mouth be faster, improve piston rod dust cleaning quality, effectively avoid the damage of piston rod and oil seal etc., improve the service life of hydraulic oil cylinder, avoid the technical effect of hydraulic oil leakage. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 The utility model provides a kind of hydraulic oil cylinder is used the structure schematic diagram of overall structure of leakage prevention device;

[0015] Figure 2 The utility model provides a kind of hydraulic oil cylinder is used the structure schematic diagram of air cylinder at leakage prevention device;

[0016] Figure 3 The utility model provides a kind of hydraulic oil cylinder is used leakage prevention device Figure 2 The structure schematic diagram of enlarged view of A place of;

[0017] Figure 4 The utility model provides a kind of hydraulic oil cylinder is used the sectional structure schematic diagram of air cylinder at leakage prevention device;

[0018] Figure 5 The utility model provides a kind of hydraulic oil cylinder is used the structure schematic diagram of top block bottom at leakage prevention device.

[0019] In the drawing: 1, hydraulic oil cylinder barrel;2, piston rod;3, top block;4, fixed cover plate;5, air cylinder;501, dustproof cylinder;502, filter screen;503, second check valve;6, first rack;7, sealing ring;8, gas pipe;9, first check valve;10, connecting block;11, hollow annular block;12, air jet mouth;13, pull rod;14, piston;15, connecting plate;16, second rack;17, vertical bar;18, gear. DETAILED DESCRIPTION

[0020] The technical scheme in the embodiments of the utility model will be described clearly and completely in conjunction with the drawings of the embodiments of the utility model, and obviously, the described embodiments are only a part of the embodiments of the utility model, not all the embodiments.

[0021] It should be explained that the embodiments in the application and the features in the embodiments can be combined with each other without conflict.The utility model will be described in detail with reference to the drawings and in conjunction with embodiments.

[0022] Referring to Figures 1-5 A kind of hydraulic cylinder leakage prevention device, including hydraulic cylinder barrel 1, fixed sleeve is provided with fixed sleeve plate 4 in the middle of hydraulic cylinder barrel 1, one end of fixed sleeve plate 4 is fixedly sleeved with air cylinder 5, piston 14 is slidably connected in air cylinder 5, and the circumferential surface of piston 14 is fixedly connected with rubber sealing ring, pull rod 13 is fixedly connected at the middle of the top of piston 14, and the top of pull rod 13 is fixedly connected with connecting plate 15 penetrating air cylinder 5, second rack 16 is fixedly connected at the other end of connecting plate 15, second one-way valve 503 is fixedly connected at the bottom of air cylinder 5, and second one-way valve 503 is communicated with the bottom of air cylinder 5, dust cylinder 501 is fixedly connected at the bottom of the outer wall of air cylinder 5, and filter screen 502 is screwed at the bottom of dust cylinder 501, filter screen 502 can avoid dust into the inside of air cylinder 5.

[0023] In the embodiment, the top of the hydraulic cylinder barrel 1 is fixedly connected with a sealing ring 7, and a piston rod 2 is arranged in the middle of the sealing ring 7, and the top of the piston rod 2 is fixedly connected with a top block 3.

[0024] In the embodiment, the top of the hydraulic cylinder barrel 1 is fixedly connected with a plurality of connecting blocks 10, the top of the plurality of connecting blocks 10 is fixedly connected with a same hollow ring block 11, and a plurality of air nozzles 12 are fixedly connected at equal distances on the inner circumferential surface of the hollow ring block 11, and the plurality of air nozzles 12 are communicated with the hollow ring block 11, and the plurality of air nozzles 12 are arranged to spray around the piston rod 2.

[0025] In the embodiment, the bottom of the air cylinder 5 is fixedly connected with two gas conveying pipes 8 on both sides, the other ends of the two gas conveying pipes 8 are penetratingly fixedly connected with the hollow ring block 11 through the fixed sleeve plate 4, the two sides of the fixed sleeve plate 4 are provided with circular holes matched with the gas conveying pipes 8, and the middle of the two gas conveying pipes 8 is fixedly sleeved with a first one-way valve 9, so that the gas in the gas conveying pipe 8 can only enter the hollow ring block 11 from the air cylinder 5.

[0026] In the embodiment, the bottom of the top block 3 is fixedly connected with two vertical strips 17 on the side close to the air cylinder 5, and the same gear 18 is rotatably connected between the bottoms of the two vertical strips 17, and the gear 18 is engaged with the second rack 16.

[0027] In the embodiment, the first rack 6 is fixedly connected with the side of the outer wall of the hydraulic cylinder barrel 1 close to the second rack 16, and the first rack 6 is engaged with the gear 18, so that the moving speed of the piston 14 is faster than the speed of the piston rod 2 through the cooperation of the gear 18, the second rack 16 and the first rack 6, to ensure the pressure of the airflow.

[0028] Working principle: when the piston rod 2 is in use, when the piston rod 2 is elongated, through the setting of the gear 18 and the first rack 6, the second rack 16 and the pull rod 13 and the piston 14 are quickly raised, through the setting of the second rack 16, the gear 18 and the first rack 6, the stroke of the piston 14 is larger than the stroke of the piston rod 2, so that the bottom of the air cylinder 5 starts to suck air, the air enters the bottom of the air cylinder 5 from the filter screen 502 and the second one-way valve 503, and the top of the air cylinder 5 is provided with an exhaust hole, the gas at the top of the piston 14 is discharged, the setting of the filter screen 502 prevents dust and the like from entering the inside of the air cylinder 5, when the piston rod 2 is retracted, the piston 14 is lowered faster than the piston rod 2, so that the gas at the bottom of the air cylinder 5 is transported into the hollow annular block 11 through the two gas conveying pipes 8, and the multiple air nozzles 12 are matched to realize the injection of the piston rod 2 and the sealing ring 7, so as to avoid the damage of the dust remaining on the oil seal to the rod wall of the piston rod 2 and the damage of the oil seal, thereby causing the leakage of the hydraulic oil cylinder 1, effectively improving the service life of the hydraulic oil cylinder 1, and at the same time, due to the faster descending speed of the piston 14 than the descending speed of the piston rod 2, the airflow at the air nozzle 12 is larger.

[0029] For the purposes of this description, spatially relative terms, such as "above", "below", "up", "down", "top", "bottom", "side" and the like, are used to describe the relative position of one element to another element as illustrated in the figures. It is understood that the spatially relative terms are intended to encompass different orientations of the device in use or operation in addition to the orientations depicted in the figures. For example, if a device in the figures is inverted, then a dependent element described as "above" or "up" of other elements would then be oriented "below" or "down" relative to the other elements. Accordingly, the exemplary term "above" can encompass both an orientation of above and below. The device can be otherwise oriented (rotated 90 degrees or at other orientations) and the spatially relative descriptors used herein interpreted accordingly. It is to be understood that the use of spatially relative terms does not indicate a fixed position in time and / or space.

[0030] It is to be understood that the terms so used are merely descriptive, rather than limiting, of the exemplary embodiments according to the present application. As used herein, unless otherwise indicated, the use of the singular includes the plural and back again; and, moreover, the use of "including", "containing", "having" or "comprising" or variations thereof is intended to be inclusive of the features, steps, operations, devices, components and / or elements so described, and any combination thereof.

[0031] The above merely describes preferred embodiments of the present application and is not intended to limit the present application. For those skilled in the art, the present application can have various modifications and changes. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the protection scope of the present application.

Claims

1. A leakage prevention device for a hydraulic cylinder comprising a hydraulic cylinder barrel (1), characterized in that, The middle part of the hydraulic cylinder (1) is fixedly sleeved with a fixed sleeve plate (4), one end of the fixed sleeve plate (4) is fixedly sleeved with a gas cylinder (5), the inside of the gas cylinder (5) is slidably connected with a piston (14), the circumferential surface of the piston (14) is fixedly connected with a rubber sealing ring, the top of the piston (14) is fixedly connected with a pull rod (13), the top of the pull rod (13) penetrates through the gas cylinder (5) and is fixedly connected with a connecting plate (15), the other end of the connecting plate (15) is fixedly connected with a second rack (16), the bottom of the gas cylinder (5) is fixedly connected with a second one-way valve (503), the second one-way valve (503) is communicated with the bottom of the gas cylinder (5), the bottom of the outer wall of the gas cylinder (5) is fixedly connected with a dustproof cylinder (501), and the bottom of the dustproof cylinder (501) is screwed with a filter screen (502).

2. The hydraulic cylinder leak prevention device of claim 1, wherein The top of the hydraulic cylinder (1) is fixedly connected with a sealing ring (7), and the middle part of the sealing ring (7) is provided with a piston rod (2), and the top of the piston rod (2) is fixedly connected with a top block (3).

3. The hydraulic cylinder leak prevention device of claim 1, wherein The top of the hydraulic cylinder (1) is fixedly connected with a plurality of connecting blocks (10), the top of the plurality of connecting blocks (10) is fixedly connected with a same hollow ring block (11), and the inside circumferential surface of the hollow ring block (11) is fixedly connected with a plurality of air nozzles (12) at equal distances, and the plurality of air nozzles (12) are communicated with the hollow ring block (11).

4. The hydraulic cylinder leak prevention device of claim 1, wherein The bottom of the gas cylinder (5) is fixedly connected with a gas conveying pipe (8) on both sides, the other end of the two gas conveying pipes (8) penetrates through the fixed sleeve plate (4) and is fixedly connected on the hollow ring block (11), the two sides of the fixed sleeve plate (4) are provided with circular holes matched with the gas conveying pipes (8), and the middle parts of the two gas conveying pipes (8) are fixedly sleeved with a first one-way valve (9).

5. The hydraulic cylinder leak prevention device of claim 2, wherein, The bottom of the top block (3) is fixedly connected with two vertical bars (17) on one side close to the gas cylinder (5), the bottom of the two vertical bars (17) is rotatably connected with a same gear (18), and the gear (18) is engaged with the second rack (16).

6. The hydraulic cylinder leak prevention device of claim 1, wherein The side of the hydraulic cylinder (1) close to the second rack (16) is fixedly connected with a first rack (6), and the first rack (6) is engaged with the gear (18).

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