CN114215738A

CN114215738A - Double-cylinder hydraulic pump

Info

Publication number: CN114215738A
Application number: CN202111354494.XA
Authority: CN
Inventors: 姜亚东; 张俊旗
Original assignee: Individual
Current assignee: Individual
Priority date: 2021-11-16
Filing date: 2021-11-16
Publication date: 2022-03-22

Abstract

The utility model relates to the technical field of hydraulic pumps, in particular to a double-cylinder hydraulic pump which comprises an oil tank, wherein connecting columns which are uniformly distributed are fixedly arranged on the outer surface of the upper end of the oil tank, supporting plates are fixedly arranged on the outer surfaces of the upper ends of four groups of connecting columns, a hydraulic pump body is arranged on the outer surface of the upper end of each supporting plate, two groups of connecting pipes are symmetrically connected with the outer surface of the upper end of the oil tank in a penetrating manner close to the middle position, the upper ends of the connecting pipes penetrate through the supporting plates and are fixedly connected with the hydraulic pump body, an oil filter body is arranged at the middle position of each connecting pipe, and a first connecting part is in threaded connection with the lower end of the inner surface of the oil filter body. According to the utility model, by arranging the auxiliary mechanism, when the filter hole of the filter element is blocked or damaged after the oil filter body is used for a long time, the whole set of the shell and all components is not required to be discarded, a whole set of new oil filter is replaced, unnecessary resource waste and environment damage are avoided, and the overall practicability is improved.

Description

Double-cylinder hydraulic pump

Technical Field

The utility model relates to the technical field of hydraulic pumps, in particular to a double-cylinder hydraulic pump.

Background

One element of a hydraulic pump that provides pressurized fluid for hydraulic transmission is the pump. The hydraulic fluid machine has the function of converting the mechanical energy of a power machine (such as a motor, an internal combustion engine and the like) into the pressure energy of liquid and lifting low-pressure liquid into high-pressure liquid. The service life of the hydraulic pump is influenced by a plurality of factors, and besides the design and the manufacture of the pump, the selection of some elements (such as a coupler, an oil filter and the like) related to the use of the pump, the operation in the trial run process and the like also relate to the working principle of the hydraulic pump that the movement brings the change of the volume of a pump cavity, so that the compressed fluid enables the fluid to have pressure energy. The hydraulic pump is classified into a gear pump, a plunger pump, a vane pump and a screw pump according to their structures.

The utility model discloses a full-hydraulic double-cylinder plunger pump, and the patent application number is CN201821301390.6, and the utility model relates to a full-hydraulic double-cylinder plunger pump, which comprises a pump body, a hydraulic power system and a controller, wherein a transposition piston is arranged in the center of an inner cavity of the pump body, the transposition piston divides the inner cavity of the pump body into a first cavity and a second cavity, two ends of the inner cavity of the pump body are provided with limit switches, the left side and the right side of the pump body are respectively and fixedly connected with a first cylinder body and a second cylinder body, a first plunger is arranged in the first cylinder body, a second plunger is arranged in the second cylinder body, two ends of the transposition piston are respectively connected with the first plunger and the second plunger, and the first cavity and the second cavity are both provided with an oil inlet and an oil outlet.

Although the above-mentioned patent can control the plunger pump driven by two independent hydraulic power systems, and coordinate and compensate each other, the oil supply is faster, and it is easy to adjust, so that the system not only can automatically and continuously operate, but also can make the fluid output stably at a constant flow rate, the flow control precision is relatively higher, and the working rate is higher, in the actual working process, in order to maintain the efficiency of the oil filter, the oil filter needs to be replaced regularly, the oil filter usually includes a sealed housing and various components and filter elements arranged inside the housing, the design of the sealed housing makes the user unable to replace the failed filter element alone, and must be discarded together with the housing and each component, a whole set of new oil filter is replaced, not only causing useless waste of resources but also causing environmental damage, and simultaneously, the hydraulic oil level inside the oil tank in the prior art needs to be checked regularly, and (4) checking the liquid level, and if the liquid level does not meet the standard, if the working personnel cannot timely supplement the hydraulic oil to the specified range, the hydraulic mechanism cannot work normally, and even is damaged.

To this end, a two-cylinder hydraulic pump is proposed.

Disclosure of Invention

The present invention is directed to a dual cylinder hydraulic pump to solve the above problems.

In order to achieve the purpose, the utility model provides the following technical scheme: a double-cylinder hydraulic pump comprises an oil tank, connecting columns which are uniformly distributed are fixedly arranged on the outer surface of the upper end of the oil tank, supporting plates are fixedly arranged on the outer surfaces of the upper ends of four groups of connecting columns, a hydraulic pump body is arranged on the outer surface of the upper end of the supporting plate, two groups of connecting pipes are symmetrically connected with the outer surface of the upper end of the oil tank in a penetrating manner near the middle position, the upper ends of the connecting pipes penetrate through the supporting plate and are fixedly connected with the hydraulic pump body, an oil filter body is arranged at the middle position of the connecting pipes, a first connecting part is in threaded connection with the lower end of the inner surface of the oil filter body, the oil filter body is fixedly connected with the connecting pipes near the lower end of the oil filter body through the first connecting part, an auxiliary mechanism is arranged at the middle position of the connection between the oil filter body and the first connecting part, and an alarm mechanism is arranged at the lower end of the connecting pipes near the inner part of the oil tank, the upper end of the inner surface of the oil filter body is in threaded connection with a second connecting part, the oil filter body is fixedly connected with a connecting pipe close to the upper end of the oil filter body through the second connecting part, and a filter element is arranged in the middle of the inside of the oil filter body;

the auxiliary mechanism comprises a mounting groove, an air bag, a spring, a first fixing block, a first fixing groove, a second fixing groove and a second fixing block, wherein the mounting groove is formed in the middle position of the outer surface of each of two sides of the first connecting part, the air bag is fixedly mounted in the middle position of the outer surface of one side of the mounting groove, the spring is fixedly mounted on the outer surface of one side of the mounting groove close to the outer side of the air bag, the first fixing block is fixedly mounted on the outer surface of one side of the air bag and fixedly connected with the spring, the first fixing grooves are formed in two sides of the inner surface of the oil filter body, the mounting groove is horizontally corresponding to the first fixing grooves, the second fixing blocks are fixedly mounted on the outer surface of the upper end and the outer surface of the lower end of the filter element close to the edges of the two sides, the second fixing grooves are formed in the positions of the inner bottom surface and the inner top surface of the oil filter body close to the edges of the two sides, and the filter element is fixedly connected with the oil filter body through a second fixing block and a second fixing groove.

The prior art can control the plunger pump driven by two independent hydraulic power systems. The utility model provides a filter which is coordinated and compensated with each other, oil supply is faster and adjustment is easy, but in the actual working process, in order to maintain the oil filtering efficiency, the oil filter body needs to be replaced regularly, mainly because excessive impurities are accumulated on a filter element after the oil filter body is used for a long time, so that the filtering hole of the filter element is blocked, the oil filtering efficiency is reduced, and the filter element needs to be replaced regularly to recover the oil filtering function of the oil filter body. When the oil filter works, because the temperature of hydraulic oil is about seventy degrees, substances which are easy to expand when heated, such as carbon dioxide, air and other gases, are arranged in the air bag, the air bag is made of silicon rubber materials and can bear high temperature of four hundred degrees, the heat resistance of the silicon rubber is good, meanwhile, the supporting performance is high, at the moment, the gas in the air bag expands when heated to drive the air bag to expand, in the process that the air bag expands when heated, the expansion force of the air bag enables the first fixing block to overcome the elastic force of the spring in the mounting groove and move towards the direction close to the first fixing groove until the front end outer surface of the first fixing block is tightly abutted against the outer surface of the first fixing groove, the fixation is completed, when the tightness degree of connection between the oil filter body and the first connecting part is ensured, the phenomenon of side leakage of hydraulic oil is avoided, the problem that the connection between the oil filter body and the first connecting part is damaged is caused, and the service life of the oil filter body and the first connecting part is prolonged, when the filter element is damaged or the filter hole is blocked and needs to be replaced, the temperature in the oil filter body is reduced, the air bag is contracted, the expansion force disappears, and in the process that the spring recovers elastic deformation, the first fixing block is driven to gradually move towards the direction close to the mounting groove in the first fixing groove until the first fixing block completely enters the mounting groove, the first connecting part is separated from the oil filter body by rotating the first connecting part, the first connecting part is cancelled, the second fixing block arranged at the lower end of the filter element is separated from the second fixing groove arranged at the upper end of the first connecting part, the second fixing block arranged on the outer surface of the upper end of the filter element is separated from the second fixing groove arranged on the inner top surface of the oil filter body by manpower, the filter element can be cancelled for replacement or maintenance, so that after the oil filter body is used for a long time, when the filter hole of the filter element is blocked or damaged, the whole set of the shell and all components does not need to be discarded, the whole set of new oil filter is replaced, so that unnecessary resource waste and environment damage are avoided, and the overall practicability is improved.

Preferably, the inner bottom surfaces of the second fixing grooves formed in the inner bottom surface of the oil filter body are provided with first mounting blocks, and a magnet is fixedly mounted between the two groups of first mounting blocks.

During operation, metal impurities such as scrap iron and the like cannot be effectively intercepted and filtered, and due to the shape particularity of the metal impurities, the filter element is often damaged under long-term high-pressure impact, so that the whole hydraulic system is polluted, and hydraulic elements are maintained and replaced in large batches.

Preferably, the outer surfaces of the two sides of the magnet are fixedly provided with rotating rods close to the middle position, one side of the first mounting block is provided with a rotating groove close to the middle position, and the magnet is rotatably connected with the rotating groove through the rotating rods in the middle of the first mounting block.

The during operation makes magnet and first installation piece rotate through bull stick and rotation groove and is connected, and at the in-process that hydraulic oil strikes, the magnet takes place to rotate to each side surface of guaranteeing the magnet can all exert the adsorption, thereby further guarantees the adsorption effect of magnet.

Preferably, the alarm mechanism comprises a second mounting block, a sliding groove, a sliding block, a sliding rod, a first switch contact piece, a third mounting block, a second switch contact piece, a floating plate and an alarm, a second mounting block is fixedly mounted inside the oil tank and close to the outer side of the connecting pipe, sliding grooves are formed in the middle positions inside two side walls of the second mounting block, a slide bar is connected in the slide groove in a sliding way, a slide block is fixedly arranged on the outer surface of the upper end of the slide bar, the sliding groove is connected with the middle of the sliding rod in a sliding way through a sliding block, a first switch contact piece is fixedly arranged on the outer surface of the lower end of the sliding block, a third mounting block is fixedly mounted on the inner surface of the sliding groove close to the lower end, a second switch contact piece is fixedly mounted on the outer surface of the upper end of the third mounting block, the slide bar runs through third installation piece fixed mounting and has the kickboard, the upper end surface of oil tank is close to left side edge fixed mounting and has the alarm.

The hydraulic oil liquid level in the oil tank of the prior art needs to be checked regularly to check the liquid level height, when the liquid level height does not meet the standard, if a worker cannot timely supplement the hydraulic oil to a specified range, the hydraulic mechanism cannot work normally and even is damaged, the utility model arranges the alarm mechanism, because the floating plate is made of ethylene-vinyl acetate copolymer and has buoyancy, in the process of the hydraulic oil liquid level in the oil tank descending, the floating plate can also move downwards due to gravity, in the process of the downward movement of the floating plate, the floating plate drives the slide bar to move downwards in the sliding groove, namely the slide block moves downwards in the sliding groove, because the distance between the inside of the slide block and the third mounting block is equal to the difference between the original liquid level and the unsafe liquid level in the oil tank, when the unsafe liquid level in the oil tank descends, the floating plate moves downwards to drive the slide bar to move downwards in the sliding groove, first switch contact and second switch contact the signal of telecommunication, start the alarm and remind the staff to supply hydraulic oil, when supplying hydraulic oil, the inside liquid level of oil tank rises, the kickboard is because the reason rebound of buoyancy, drive the slide bar at the inside rebound of sliding tray, the slider is inside rebound at the sliding tray promptly, first switch contact and second switch contact separation, the going on of convenient next alarm work, thereby guarantee that the staff can be timely supply the inside hydraulic oil of oil tank, avoid the staff can not timely supply hydraulic oil to the regulation scope, can lead to the unable normal work of hydraulic pressure mechanism, the problem of damage takes place even, improve the practicality of totality.

Preferably, the outer surface of the lower end of the second mounting block is fixedly provided with a fourth mounting block, the outer surface of the lower end of the fourth mounting block is fixedly provided with a scraper, and the fourth mounting block and the scraper are both positioned outside the slide bar.

When the switch contact piece cleaning device works, the scraper is arranged, so that hydraulic oil attached to the sliding rod is cleaned in the process that the floating plate moves upwards due to buoyancy and drives the sliding rod to move upwards in the sliding groove, and the phenomenon that the normal work of the first switch contact piece and the second switch contact piece is influenced because the hydraulic oil is brought into the sliding groove in the process that the sliding rod moves upwards in the sliding groove is avoided.

Preferably, a sealing ring is fixedly installed at a position, close to the middle, where the sliding rod is connected with the third installation block, and the sealing ring is made of fluorosilicone rubber.

During operation, the sealing ring is arranged at the joint of the sliding rod and the third mounting block, hydraulic oil is prevented from entering the sliding groove from the joint of the sliding rod and the third mounting block to influence the normal operation of the first switch contact and the second switch contact, and meanwhile, the sliding rod is further prevented from bringing the hydraulic oil into the sliding groove in the upward movement process inside the sliding groove, so that the normal operation of the alarm mechanism is ensured.

Compared with the prior art, the utility model has the beneficial effects that:

1. by arranging the auxiliary mechanism, when the filter hole of the filter element is blocked or damaged after the oil filter body is used for a long time, the whole set of the shell and all components is not required to be discarded, a whole set of new oil filter is replaced, unnecessary resource waste and environment damage are avoided, and the overall practicability is improved.

2. According to the utility model, the alarm mechanism is arranged, the sliding block moves upwards in the sliding groove, and the first switch contact piece is separated from the second switch contact piece, so that the next alarm work is facilitated, thereby ensuring that a worker can supplement hydraulic oil in the oil tank in time, avoiding the problem that the hydraulic mechanism cannot work normally or even is damaged because the worker cannot supplement the hydraulic oil in time to a specified range, and improving the overall practicability.

Drawings

FIG. 1 is a schematic view of the complete structure of the present invention;

FIG. 2 is a partial elevational cross-sectional structural view of the present invention;

FIG. 3 is an enlarged view of the structure at A of the present invention;

FIG. 4 is an enlarged view of the structure of the present invention at B;

FIG. 5 is an enlarged view of the structure at C of the present invention;

FIG. 6 is an enlarged structural view taken at D of the present invention;

FIG. 7 is an enlarged structural view at E of the present invention;

fig. 8 is a structural view of the joint of the second mounting block and the slide bar of the present invention.

In the figure: 1. an oil tank; 2. connecting columns; 3. a support plate; 4. a hydraulic pump body; 5. a connecting pipe; 6. an oil filter body; 7. a first connection portion; 8. an auxiliary mechanism; 81. mounting grooves; 82. an air bag; 83. a spring; 84. a first fixed block; 85. a first fixing groove; 86. a second fixing groove; 87. a second fixed block; 88. a first mounting block; 89. a magnet; 811. a rotating rod; 812. a rotating groove; 9. an alarm mechanism; 91. a second mounting block; 92. a sliding groove; 93. a slider; 94. a slide bar; 95. a first switch contact; 96. a third mounting block; 97. a second switch contact; 98. a floating plate; 99. an alarm; 911. a fourth mounting block; 912. a squeegee; 913. a seal ring; 10. a second connecting portion; 11. and (3) a filter element.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

In the description of the present invention, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", and the like, indicate orientations and positional relationships based on those shown in the drawings, and are used only for convenience of description and simplicity of description, and do not indicate or imply that the device or element being referred to must have a particular orientation, be constructed and operated in a particular orientation, and thus, should not be considered as limiting the present invention.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second", may explicitly or implicitly include one or more of the described features. In the description of the present invention, "a plurality" means two or more unless specifically defined otherwise. Furthermore, the terms "mounted," "connected," and "connected" are to be construed broadly and may, for example, be fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meanings of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Referring to fig. 1 to 8, the present invention provides a dual cylinder hydraulic pump, which comprises:

a double-cylinder hydraulic pump is shown in figures 1 to 4 and comprises an oil tank 1, wherein connecting columns 2 which are uniformly distributed are fixedly arranged on the outer surface of the upper end of the oil tank 1, supporting plates 3 are fixedly arranged on the outer surfaces of the upper ends of four groups of connecting columns 2, a hydraulic pump body 4 is arranged on the outer surface of the upper end of each supporting plate 3, two groups of connecting pipes 5 are symmetrically connected with the outer surface of the upper end of the oil tank 1 in a penetrating way near the middle position, the upper ends of the connecting pipes 5 are fixedly connected with the hydraulic pump body 4 in a penetrating way through the supporting plates 3, an oil filter body 6 is arranged at the middle position of each connecting pipe 5, a first connecting part 7 is in threaded connection with the lower end of the inner surface of the oil filter body 6, the oil filter body 6 is fixedly connected with the connecting pipe 5 near the lower end of the oil filter body 6 through the first connecting part 7, an auxiliary mechanism 8 is arranged at the middle position of the connection of the oil filter body 6 and the first connecting part 7, an alarm mechanism 9 is arranged at the lower end of the inside of the oil tank 1 close to the connecting pipe 5, a second connecting part 10 is in threaded connection with the upper end of the inner surface of the oil filter body 6, the oil filter body 6 is fixedly connected with the connecting pipe 5 close to the upper end of the oil filter body 6 through the second connecting part 10, and a filter element 11 is arranged at the middle position of the inside of the oil filter body 6;

the auxiliary mechanism 8 includes a mounting groove 81, an air bag 82, a spring 83, a first fixing block 84, a first fixing groove 85, a second fixing groove 86 and a second fixing block 87, the mounting groove 81 is formed in the middle position of the outer surface of each of the two sides of the first connecting portion 7, the air bag 82 is fixedly mounted in the middle position of the outer surface of each of the two sides of the mounting groove 81, the spring 83 is fixedly mounted on the outer surface of each of the one sides of the mounting groove 81, which is close to the outer side of the air bag 82, the first fixing block 84 is fixedly mounted on the outer surface of each of the one sides of the air bag 82, the first fixing block 84 is fixedly connected with the spring 83, the first fixing grooves 85 are formed in the two sides of the inner surface of the oil filter body 6, the mounting groove 81 is horizontally corresponding to the first fixing groove 85, the second fixing blocks 87 are fixedly mounted on the outer surface of the upper end and the outer surface of the lower end of the filter element 11, which are close to the edges of the two sides, and the inner bottom surface and the inner top surface of the oil filter body 6 are respectively formed with the second fixing grooves 86 The filter element 11 and the oil filter body 6 are fixedly connected with a second fixing groove 86 through a second fixing block 87.

Although the prior art can control the plunger pump to be driven by two independent hydraulic power systems, the plunger pump is coordinated and compensated with each other, the oil supply is faster and easy to adjust, but in the actual working process, in order to maintain the oil filtering efficiency, the oil filter body 6 needs to be replaced regularly, the utility model arranges the auxiliary mechanism 8, when in installation, the second fixed block 87 fixedly arranged on the outer surface of the upper end of the filter element 11 is aligned with the second fixed groove 86 arranged on the inner top surface of the oil filter body 6, the second fixed block 87 arranged on the outer surface of the upper end of the filter element 11 is extruded into the second fixed groove 86 arranged on the inner top surface of the oil filter body 6 by manpower, the oil filter body 6 is installed together with the first connecting part 7 by rotation, after the installation, the inner bottom surface of the oil filter body 6 and the inner surface of the second fixed groove 86 arranged on the inner top surface limit and fix the filter element 11 by the second fixed block 87, when the oil filter works, because the temperature of hydraulic oil is about seventy degrees, substances which are easy to expand when heated, such as carbon dioxide, air and other gases, are arranged in the air bag 82, the air bag 82 is made of silicon rubber materials and can bear four hundred-degree high temperature, the heat resistance of the silicon rubber is good, and meanwhile, the supporting performance is high, at the moment, the gas in the air bag 82 expands when heated, the air bag 82 is driven to expand, in the process that the air bag 82 expands when heated, the expansion force of the air bag 82 enables the first fixing block 84 to overcome the elasticity of the spring 83 in the installation groove 81 and move towards the direction close to the first fixing groove 85 until the outer surface of the front end of the first fixing block 84 is abutted against the outer surface of the first fixing groove 85 to complete the fixation, and when the tightness degree of connection between the oil filter body 6 and the first connecting part 7 is ensured, the phenomenon of side leakage of the hydraulic oil filter body 6 and the first connecting part 7 are avoided to cause damage, the service life of the oil filter body 6 and the first connecting part 7 is prolonged, when the filter element 11 is damaged or the filter hole is blocked and needs to be replaced, only the temperature in the oil filter body 6 is reduced, the air bag 82 is contracted, the expansion force disappears, and the first fixing block 84 is driven to gradually move towards the direction close to the mounting groove 81 in the first fixing groove 85 in the process that the spring 83 recovers the elastic deformation until the first fixing block 84 completely enters the mounting groove 81, the first connecting part 7 is separated from the oil filter body 6 by rotating the first connecting part 7, the first connecting part 7 is cancelled, the second fixing block 87 arranged at the lower end of the filter element 11 is separated from the second fixing groove 86 arranged at the upper end of the first connecting part 7, the second fixing block 87 arranged at the outer surface of the upper end of the filter element 11 is separated from the second fixing groove 86 arranged at the inner top surface of the oil filter body 6 by manpower, and the filter element 11 can be cancelled for replacement or maintenance, therefore, after the oil filter body 6 is used for a long time, when the filtering holes of the filter element 11 are blocked or damaged, the whole set of the shell and all parts and components does not need to be discarded, a whole set of new oil filter is replaced, unnecessary resource waste is not caused, the environment is also damaged, and the overall practicability is improved.

As one embodiment of the present invention, as shown in fig. 4, first mounting blocks 88 are provided on the inner bottom surface of the second fixing grooves 86 provided on the inner bottom surface of the oil filter body 6, and a magnet 89 is fixedly mounted between the two first mounting blocks 88.

During operation, metal impurities such as scrap iron and the like cannot be effectively intercepted and filtered, and due to the shape particularity of the metal impurities, the filter element 11 is often damaged under long-term high-pressure impact, so that the whole hydraulic system is polluted, and hydraulic elements are maintained and replaced on a large scale.

As an embodiment of the present invention, as shown in fig. 5, rotation rods 811 are fixedly mounted on outer surfaces of both sides of the magnet 89 near the middle position, a rotation groove 812 is formed on one side of each of the two sets of first mounting blocks 88 near the middle position, and the magnet 89 and the first mounting block 88 are rotatably connected with the rotation groove 812 through the rotation rods 811.

During operation, make magnet 89 and first installation piece 88 rotate through bull stick 811 and rotation groove 812 and be connected, at the in-process that hydraulic oil strikes, magnet 89 takes place to rotate to guarantee that each side surface of magnet 89 can all exert the adsorption to further guarantee the adsorption effect of magnet 89.

As an embodiment of the present invention, as shown in fig. 6 to 7, the alarm mechanism 9 includes a second mounting block 91, a sliding groove 92, a sliding block 93, a sliding rod 94, a first switch contact 95, a third mounting block 96, a second switch contact 97, a floating plate 98 and an alarm 99, the second mounting block 91 is fixedly mounted inside the oil tank 1 near the outer side of the connecting pipe 5, the sliding groove 92 is formed in both sides of the second mounting block 91, the sliding rod 94 is slidably connected inside the sliding groove 92, the sliding block 93 is fixedly mounted on the outer surface of the upper end of the sliding rod 94, the sliding groove 92 and the sliding rod 94 are slidably connected through the sliding block 93, the first switch contact 95 is fixedly mounted on the outer surface of the lower end of the sliding block 93, the third mounting block 96 is fixedly mounted on the inner surface of the sliding groove 92 near the lower end, the second switch contact 97 is fixedly mounted on the outer surface of the upper end of the third mounting block 96, the sliding rod 94 penetrates through the third mounting block 96 and is fixedly provided with a floating plate 98, and the outer surface of the upper end of the oil tank 1 is fixedly provided with an alarm 99 close to the edge of the left side.

In the prior art, the hydraulic oil level in the oil tank 1 needs to be checked regularly to check the liquid level, when the liquid level is not in accordance with the standard, if a worker cannot timely supplement the hydraulic oil to a specified range, the hydraulic mechanism cannot work normally, or even the hydraulic mechanism is damaged, the utility model arranges the alarm mechanism 9, because the floating plate 98 is made of ethylene-vinyl acetate copolymer and has buoyancy, in the process of the hydraulic oil level in the oil tank 1 descending, because of gravity, the floating plate 98 can also move downwards, in the process of the floating plate 98 moving downwards, the floating plate 98 drives the sliding rod 94 to move downwards in the sliding groove 92, namely the sliding block 93 moves downwards in the sliding groove 92, because the distance between the inside of the sliding block 93 and the third mounting block 96 is equal to the difference between the original liquid level and the unsafe liquid level in the oil tank 1, when the unsafe liquid level in the oil tank 1 descends, when the floating plate 98 moves downwards to drive the sliding rod 94 to move downwards in the sliding groove 92, the first switch contact piece 95 is in contact with the second switch contact piece 97 to send an electric signal, the alarm 99 is started to remind a worker to supplement hydraulic oil, when the hydraulic oil is supplemented, the liquid level in the oil tank 1 rises, the floating plate 98 moves upwards due to buoyancy, the sliding rod 94 is driven to move upwards in the sliding groove 92, namely, the sliding block 93 moves upwards in the sliding groove 92, the first switch contact piece 95 is separated from the second switch contact piece 97, the next alarm operation is convenient, so that the worker can supplement the hydraulic oil in the oil tank 1 in time, the situation that the worker cannot supplement the hydraulic oil in time to a specified range is avoided, the hydraulic mechanism cannot work normally or even is damaged is avoided, and the overall practicability is improved.

As shown in fig. 7, in one embodiment of the present invention, a fourth mounting block 911 is fixedly mounted on an outer surface of a lower end of the second mounting block 91, a scraper 912 is fixedly mounted on an outer surface of a lower end of the fourth mounting block 911, and both the fourth mounting block 911 and the scraper 912 are located outside the slide bar 94.

When the switch is in operation, the scraper 912 is arranged, so that in the process that the floating plate 98 moves upwards due to buoyancy and drives the sliding rod 94 to move upwards in the sliding groove 92, hydraulic oil attached to the sliding rod 94 is cleaned, and the phenomenon that the sliding rod 94 brings the hydraulic oil into the sliding groove 92 in the process of moving upwards in the sliding groove 92 to influence the normal operation of the first switch contact piece 95 and the second switch contact piece 97 is avoided.

As an embodiment of the present invention, as shown in fig. 8, a sealing ring 913 is fixedly installed at a position near the middle of the connection between the slide bar 94 and the third installation block 96, and the sealing ring 913 is made of a fluorosilicone rubber material.

During operation, by arranging the sealing ring 913 at the joint between the sliding rod 94 and the third mounting block 96, hydraulic oil is prevented from entering the sliding groove 92 from the joint between the sliding rod 94 and the third mounting block 96 to affect the normal operation of the first switch contact 95 and the second switch contact 97, and meanwhile, the sliding rod 94 is further prevented from bringing the hydraulic oil into the sliding groove 92 in the upward movement process in the sliding groove 92, so that the normal operation of the alarm mechanism 9 is ensured.

The working principle is as follows: when the oil filter is installed, firstly, the second fixing block 87 fixedly installed on the outer surface of the upper end of the filter element 11 is aligned with the second fixing groove 86 formed in the inner top surface of the oil filter body 6, the second fixing block 87 installed on the outer surface of the upper end of the filter element 11 is extruded into the second fixing groove 86 formed in the inner top surface of the oil filter body 6 through manpower, then the oil filter body 6 is installed with the first connecting part 7 through rotation, after the installation is completed, the inner bottom surface of the oil filter body 6 and the inner surface of the second fixing groove 86 formed in the inner top surface limit and fix the filter element 11 through the second fixing block 87, when the oil filter works, as the temperature of hydraulic oil is about seventy degrees, substances which are easy to expand when heated, such as carbon dioxide, air and other gases are contained in the air bag 82, the air bag 82 is made of a silicon rubber material, can bear four hundred-degree high temperature, the heat resistance of the silicon rubber is good, and the supporting performance is high, at the moment, the air in the air bag 82 is heated and expanded to drive the air bag 82 to expand, in the process that the air bag 82 is heated and expanded, the expansion force of the air bag 82 enables the first fixing block 84 to overcome the elastic force of the spring 83 in the mounting groove 81 and move towards the direction close to the first fixing groove 85 until the front end outer surface of the first fixing block 84 is abutted against the outer surface of the first fixing groove 85, the fixing is completed, when the connection tightness degree between the oil filter body 6 and the first connecting part 7 is ensured, the phenomenon of side leakage of hydraulic oil is avoided, the problem that the connection part between the oil filter body 6 and the first connecting part 7 is damaged is solved, the service life of the oil filter body 6 and the first connecting part 7 is prolonged, when the filter element 11 is damaged or the filter hole is blocked and needs to be replaced, only the temperature in the oil filter body 6 is reduced, the air bag 82 is contracted, the expansion force disappears, and the spring 83 restores to elastically deform, the first fixing block 84 is driven to gradually move towards the direction close to the mounting groove 81 in the first fixing groove 85 until the first fixing block 84 completely enters the mounting groove 81, the first connecting part 7 is separated from the oil filter body 6 by rotating the first connecting part 7, the first connecting part 7 is cancelled, the second fixing block 87 arranged at the lower end of the filter element 11 is separated from the second fixing groove 86 arranged at the upper end of the first connecting part 7, the second fixing block 87 arranged at the outer surface of the upper end of the filter element 11 is separated from the second fixing groove 86 arranged at the inner top surface of the oil filter body 6 by manpower, the filter element 11 can be cancelled for replacement or maintenance, therefore, when the filter hole of the filter element 11 is blocked or damaged after the oil filter body 6 is used for a long time, the whole set of the shell and all components does not need to be discarded, a whole set of new oil filter is replaced, and unnecessary waste of resources and environment damage are not caused, improving the overall practicability.

The electric elements in the document are electrically connected with an external main controller and 220V mains supply through a transformer, the main controller can be a conventional known device controlled by a computer and the like, the product model provided by the utility model is only used according to the structural characteristics of the product, the product can be adjusted and modified after being purchased, so that the product is more matched with and accords with the technical scheme of the utility model, the product model is a technical scheme of the optimal application of the technical scheme, the product model can be replaced and modified according to the required technical parameters, and the product model is familiar to the technical personnel in the field, so that the technical scheme provided by the utility model can clearly obtain the corresponding use effect.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the utility model, the scope of which is defined in the appended claims and their equivalents.

Claims

1. A double-cylinder hydraulic pump comprises an oil tank (1), and is characterized in that: the oil filter is characterized in that connecting columns (2) which are uniformly distributed are fixedly arranged on the outer surface of the upper end of the oil tank (1), supporting plates (3) are fixedly arranged on the outer surfaces of the upper ends of the four groups of connecting columns (2), a hydraulic pump body (4) is arranged on the outer surface of the upper end of each supporting plate (3), two groups of connecting pipes (5) are symmetrically and penetratingly connected to the outer surface of the upper end of the oil tank (1) close to the middle position, the upper ends of the connecting pipes (5) penetrate through the supporting plates (3) and the hydraulic pump body (4) and are fixedly connected, an oil filter body (6) is arranged at the middle position of each connecting pipe (5), a first connecting portion (7) is connected to the lower end of the inner surface of the oil filter body (6) in a threaded mode, the oil filter body (6) is fixedly connected with the connecting pipes (5) close to the lower end of the oil filter body (6) through the first connecting portions (7), and an auxiliary mechanism (8) is arranged at the middle position of the connecting portion (6) and the first connecting portion (7) ) The lower end of the inside of the oil tank (1), which is close to the connecting pipe (5), is provided with an alarm mechanism (9), the upper end of the inner surface of the oil filter body (6) is in threaded connection with a second connecting part (10), the oil filter body (6) is fixedly connected with the connecting pipe (5), which is close to the upper end of the oil filter body (6), through the second connecting part (10), and the middle position of the inside of the oil filter body (6) is provided with a filter element (11);

the auxiliary mechanism (8) comprises a mounting groove (81), an air bag (82), a spring (83), a first fixing block (84), a first fixing groove (85), a second fixing groove (86) and a second fixing block (87), the mounting groove (81) is formed in the middle of the outer surface of each of two sides of the first connecting portion (7), the air bag (82) is fixedly mounted in the middle of the outer surface of one side of the mounting groove (81), the spring (83) is fixedly mounted on the outer surface of one side of the mounting groove (81) close to the outer side of the air bag (82), the first fixing block (84) is fixedly mounted on the outer surface of one side of the air bag (82), the first fixing block (84) is fixedly connected with the spring (83), the first fixing groove (85) is formed in each of two sides of the inner surface of the oil filter body (6), and the mounting groove (81) horizontally corresponds to the first fixing groove (85), the outer surface of the upper end and the outer surface of the lower end of the filter element (11) are fixedly provided with second fixing blocks (87) close to the edges of the two sides, the inner bottom surface and the inner top surface of the oil filter body (6) are provided with second fixing grooves (86) close to the edges of the two sides, and the filter element (11) and the oil filter body (6) are fixedly connected with the second fixing grooves (86) through the second fixing blocks (87).

2. The dual cylinder hydraulic pump as defined in claim 1, wherein: the oil filter comprises an oil filter body (6), wherein first mounting blocks (88) are arranged on the inner bottom surface of a second fixing groove (86) formed in the inner bottom surface of the oil filter body, and a magnet (89) is fixedly mounted in the middle of the two groups of first mounting blocks (88).

3. The dual cylinder hydraulic pump as defined in claim 2, wherein: the equal fixed mounting of both sides surface of magnet (89) is close to intermediate position has bull stick (811), and is two sets of one side of first installation piece (88) is close to the intermediate position and has seted up rotation groove (812), magnet (89) and first installation piece (88) are middle to be connected with rotation groove (812) rotation through bull stick (811).

4. The dual cylinder hydraulic pump as defined in claim 1, wherein: the alarm mechanism (9) comprises a second mounting block (91), a sliding groove (92), a sliding block (93), a sliding rod (94), a first switch contact piece (95), a third mounting block (96), a second switch contact piece (97), a floating plate (98) and an alarm (99), wherein the second mounting block (91) is fixedly mounted inside the oil tank (1) and close to the outer side of the connecting pipe (5), the sliding groove (92) is formed in the middle position inside the two side walls of the second mounting block (91), the sliding rod (94) is connected inside the sliding groove (92) in a sliding mode, the sliding block (93) is fixedly mounted on the outer surface of the upper end of the sliding rod (94), the sliding groove (92) is connected with the sliding rod (94) in a sliding mode through the sliding block (93), the first switch contact piece (95) is fixedly mounted on the outer surface of the lower end of the sliding block (93), the third mounting block (96) is fixedly mounted on the inner surface of the sliding groove (92) close to the lower end, the outer fixed surface of the upper end of third installation piece (96) installs second switch contact (97), slide bar (94) run through third installation piece (96) fixed mounting have kickboard (98), the upper end surface of oil tank (1) is close to left side edge position fixed mounting and has alarm (99).

5. The dual cylinder hydraulic pump as defined in claim 4, wherein: the outer surface of the lower end of the second mounting block (91) is fixedly provided with a fourth mounting block (911), the outer surface of the lower end of the fourth mounting block (911) is fixedly provided with a scraper (912), and the fourth mounting block (911) and the scraper (912) are both positioned on the outer side of the sliding rod (94).

6. The dual cylinder hydraulic pump as defined in claim 5, wherein: the sliding rod (94) and the third mounting block (96) are fixedly provided with a sealing ring (913) close to the middle position, and the sealing ring (913) is made of fluorosilicone rubber.