RU2293880C2 - Hydraulic pump with manual drive - Google Patents

Abstract

FIELD: equipment used in emergency-rescue tools, in particular, in pumps with manual drive for delivery of working fluid into working cavities of these tools and for discharge of working fluid from discharge cavity of these tools.

SUBSTANCE: pump has casing formed as shaped bushing secured through bracket with rocker formed as handle with arm. Tank and tank body are axially aligned with pump casing axis and are secured with one another through pin and nut. Pump casing and tank body are fixed to supporting plate incorporating first-stage pressure valve and second-stage suction valve, filter and control valve. First-stage valve function is combined with second-stage suction valve function. First-stage suction and pressure valves and second-stage suction valve, as well as second-stage pressure valve are axially aligned within pump casing opening. First-stage and second-stage pressure valves and second-stage suction valve are formed as flat spring-loaded valves whose seats are set with their outer spherical surfaces within pump casing so as to be dismantled and are pressed by connection pipes. Function of valve is combined with operation of safety valve. Control valve positioned within pump is made in the form of spring-loaded flat valve and lever for regulating of loading upon valve through pusher. Breather plug located within tank is made in the form of plug with spring-loaded valve fitted therein.

EFFECT: simplified construction, reduced weight and decreased labor intensity for manufacture of pump.

Description

The device is designed to pump working fluid into the working cavity of the rescue tool (ASI) and to divert the working fluid from the ASI drain cavity.

A single-stage hydraulic pump with a manual drive is known, consisting of a housing made in the form of a cylindrical sleeve fastened to a tank made in the form of a pipe, while the opposite end of the tank is fastened to the lid, and two mutually perpendicular planes are made on the outer surface of the housing, while a pump control flywheel is installed on the side plane of the casing, and the lower plane of the casing is fastened with a support made in the form of a trapezoid of sheet material, in addition, a fitting for fastenings with a sleeve for supplying working fluid to the tool hydraulics, while the pump casing, tank and tank cover are fastened together with a stud and a special nut, while the handle with the handle are fastened through the bracket installed in the body, while the pump has valves suction and discharge, made in the form of spring-loaded balls, in addition, the tank from the side of the lid is fastened with a second support made in the form of a trapezoid made of sheet material (single-stage hydraulic pump with manual drive GNR-8004 from the company prospectus "ENERPRED", May 2004, p.20).

Known automatic two-stage pump, consisting of a housing made in the form of a sleeve with a rectangular cross section, fastened to a tank made in the form of a hollow rectangular parallelepiped, while the opposite end of the tank is closed by a lid protruding beyond the periphery of the surface of the tank body, while the pump housing, tank and the tank cap is fastened together with a stud and nut, and the handle with the handle is fastened to the body through a bracket mounted in the body, while the pump has suction and first and second stage discharges, stage switching valves and a safety valve, while the valves are made in the form of spring-loaded balls, in addition, a fitting for connecting a hose for supplying working fluid to the working tool is installed on the end of the housing (automatic two-stage pump for quick and easy operation) NM-1 from the prospectus "LUKAS rescue systems, hydraulics and control technology", L8 95RT / r, p.6).

A two-stage manual pump with hydraulic drive is also known, consisting of a pump body made in the form of a shaped sleeve with which a bracket is connected, connected to a rocker with a handle, and a tank and tank body are fixed to the pump body, while an element for fastening with a base plate in the form of a flat rectangular base with two mounting holes, in addition, sharpenings are made on the surfaces of the pump and tank housings for fastening to the tank, made in the form of a pipe, while the housing the pump, tank and tank body are fastened together by means of a stud and nut, and the pump and tank bodies, in addition, are fastened with a base plate made in the form of a rectangular parallelepiped, while two suction valves of the first and second stages are placed in the pump body, two discharge valves of the first and second stages, as well as a control valve for switching the first stage to the second spool type and a pump control valve in the form of a ball valve with which the flywheel rod interacts (two-stage manual pump with hydra Influential drive НРС-2/80 from the prospectus of the company "SPRUT", p. 7).

Closest to the claimed technical solution is a hydraulic pump with a manual drive, consisting of a housing made in the form of a shaped sleeve fastened through an arm with a rocking chair, made in the form of a handle with a handle, a tank and a tank body, located on the same axis with the axis of the pump body and fastened together by a stud and nut, while the pump and tank housings are fastened to the base plate; suction and discharge valves of the first and second stages, a filter and a control valve, while the suction and discharge valves of the first stage and the discharge valve of the second stage are located on the same axis in the hole of the pump casing (RU 2022168 C1, 10.30.1994).

Known designs of hand-operated hydraulic two-stage pumps have a complex design, since they contain two suction valves of the first and second stages, two discharge valves of the first and second stages, a pump control valve, a valve for switching the first stage to the second and safety valve, while the valves are made in in the form of spring-loaded balls, in addition, there is no safety element in the tank design that excludes the occurrence of rarefaction or excessive pressure in the tank during injection the working fluid in the instruments or returning the hydraulic fluid from the tool into the pump.

The described technical solution is aimed at simplifying the design of the pump by reducing the number of parts included in the design, as well as simplifying and reducing the number of cuts in the pump housing by combining the function of the discharge valve of the first stage with the suction function of the valve of the second stage, as well as combining the function of the safety valve with the function crane control.

The task is achieved in that the discharge valves of the first and second stages and the suction valve of the second stage are made in the form of flat spring-loaded valves, whose seats are installed in the pump casing with external spherical surfaces with clamping fittings and the possibility of dismantling.

In addition, the function of the control valve is combined with the operation of the safety valve.

A control valve is installed in the pump casing, made in the form of a spring-loaded flat valve and a lever that regulates the load on the valve through the pusher.

A breather plug is installed in the tank, made in the form of a plug with a spring-loaded valve placed in it.

The base plate is made in the form of a plate having the shape of a rectangular trapezoid.

Those. the tasks are solved by performing a rational arrangement of the valves in the pump housing and selecting the efforts of the valve springs, which made it possible to combine the function of the suction valve of the second stage with the function of the discharge valve of the first stage, as well as by introducing into the pump design a lever interacting through the pusher with a spring, which reduces the force action on the safety valve, which allowed to relieve the discharge pressure in the hydraulic system of the tool to the drain and combine the function of the valve with safety valve function.

The essence of the proposed technical solution is illustrated by drawings, where:

figure 1 shows a General view of a hydraulic two-stage pump with a manual drive, figure 2 shows a section aa of figure 1, figure 3 shows a section bB of figure 1.

The described pump consists of a housing 1, made in the form of a shaped sleeve fastened through a bracket 2 with a rocking chair, made in the form of a handle 3 with a handle 4, a tank 5 and a housing 6 of a tank 5, located on the same axis with the axis of the pump housing 1 and fastened together with a stud 7 and a nut 8, while the pump housing 1, the housing 6 of the tank 5 are fastened to the base plate 9. The pump also includes a first stage and a second stage suction valve 10, a first stage suction valve 11 and a second stage pressure valve 12, a filter 13 and control valve 14, while the valve of the first stage discharge valve 10 is combined with the function of the second stage suction valve 10, while the first and second stage suction and discharge valves 10, 11 and the second stage suction valve, as well as the second stage discharge valve 12 are located on the same axis in the hole 15 of the pump housing 1, the discharge valves 10 of the first and 12 second stages and the suction valve 10 of the second stage are made in the form of flat spring-loaded valves, the seats of which are installed in the pump housing 1 by external spherical surfaces with clamping fittings 16, 17, 1 8 and the possibility of dismantling, while the function of the valve 14 is combined with the operation of the safety valve 19, while in the pump housing 1 there is a control valve 14 made in the form of a spring-loaded flat valve and a lever 20 that regulates the load on the valve through the pusher 21, in addition, the tank 5 is equipped with a breather plug 22, made in the form of a plug with a spring-loaded valve 23 located in it, while the base plate 9 is made in the form of a plate having the shape of a rectangular trapezoid.

The manufacture and assembly of the pump can be performed, for example, as follows.

First, the individual nodes are assembled, and then the valves are placed and adjusted and the nodes are fastened into a single unit. The product is ready for use.

The manufacture of pump parts can be performed, for example, as follows. All valves can be made, for example, of UIX15 GOST 801-78 steel by machining on metal cutting machines, seats can also be obtained by machining on metal cutting machines made of GOST 5632-72 steel 95X18, the pump housing can be made of GOST 4784-97 aluminum alloy B95T1 by stamping followed by processing on metal cutting machines, the base plate can be made, for example, from sheet D16AT GOST 21631-76, the tank body can be made by casting from aluminum alloy AK7 (AL9) GOST 1583-93 with refinement on metal cutting equipment, and b It can be made, for example, from a pipe 80 × 3.5 V95T1 GOST 18482-79, while the bracket can be made, for example, from steel ZOKHGSA GOST 4543-71 by stamping with further processing on metal cutting machines. For the manufacture of a "hydraulic pump with a manual drive" does not require the use of universal and expensive equipment and materials.

The pump operates as follows.

The handle 3 is connected with the plunger, which performs a reciprocating movement and creates a pumping fluid (figure 1). The pump part of the pump design is made in a two-stage scheme: the first stage is low pressure, and the second is high, while the maximum pressure is adjusted during assembly by adjusting the safety valve with sleeve 14 (Fig. 4), when the plunger moves up - the suction phase is the working fluid from tank 6 (figure 1) moves through the intake fitting 16 (figure 4), while the ball of the valve 11 moves to the left, and the fluid enters the second stage of the plunger. When the plunger moves down - the pumping phase - the fluid enters the mechanism for switching the first stage to the second, which is located in the area of the nozzle 18 (Fig.3), after which the fluid enters the high pressure zone, while the valve 12 moves to the left, and the fluid through the nozzle 17 enters the discharge line to the connected hydraulic tool.

In case of excess pressure in the discharge line, the valve located on the seat of the safety valve 19 (Fig. 4) rises up and connects the cavity of the first stage to the drain, while part of the working fluid from the discharge line is vented through the safety valve into the tank 6.

For forced pressure relief from the discharge line to the drain line, a lever 20 is provided (Fig. 4). Pressing it down, carry out pressure relief, while the working fluid from the hydraulic tool through the drain line enters the tank.

The described design of the pump allows

to increase the reliability of the design and the service life by replacing the design of ball valves with flat valves, as a result of a decrease in the specific load in the zone of contact of the valve with the seat due to the increase in the contact area,

- to increase the reliability of the design by performing in the tank design a safety valve in the form of a breather plug, which excludes the occurrence of a vacuum or excessive pressure in the tank when pumping the working fluid into the tools or returning the working fluid from the tools to the pump

- to simplify the design of the pump by reducing the number of parts included in the design, as well as simplifying and reducing the number of cuts in the pump housing due to

- combining the function of the discharge valve of the first stage with the suction function of the valve of the second stage,

- combining the function of the safety valve with the function of the control valve.

Significantly reduces the weight of the structure by reducing the number of parts and reducing the dimensions of the pump casing as a result of the rational arrangement of the valves in the casing and selection of spring forces, as well as by making the base plate of aluminum alloy in the form of a plate having the shape of a rectangular trapezoid.

Pump repair is simplified, as valve seats are installed in the body with the possibility of dismantling, they are tightened by fittings, so there is no need to dispose of the cases.

Claims (5)

1. A hydraulic pump with a manual drive, consisting of a housing made in the form of a shaped sleeve fastened through a bracket with a rocking chair, made in the form of a handle with a handle, a tank and a tank body, located on the same axis as the axis of the pump body and fastened together by a stud and with a nut, while the pump and tank housings are fastened to the base plate, suction and discharge valves of the first and second stages, a filter and a control valve, while the suction and discharge valves of the first stage and the discharge valve of the second stage are located on one axis in the opening of the pump casing, characterized in that the discharge valves of the first and second stages and the suction valve of the second stage are made in the form of flat spring-loaded valves, whose seats are installed in the pump casing with external spherical surfaces with clamping fittings and the possibility of dismantling. 2. A hydraulic pump with a manual drive according to claim 1, characterized in that the function of the control valve is combined with the operation of the safety valve. 3. A hydraulic pump with a manual drive according to claim 1, characterized in that a control valve is installed in the pump housing, made in the form of a spring-loaded flat valve and a lever that regulates the load on the valve through the pusher. 4. The hydraulic pump with a manual actuator according to claim 1, characterized in that the tank has a breather plug made in the form of a plug with a spring-loaded valve placed in it. 5. A hydraulic pump with a manual drive according to claim 1, characterized in that the base plate is made in the form of a plate having the shape of a rectangular trapezoid.

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