CN2042520U

CN2042520U - Fluid-driving pressure-testing pump

Info

Publication number: CN2042520U
Application number: CN 87210789
Authority: CN
Inventors: 谭迥然; 王铁立
Original assignee: Individual
Current assignee: Individual
Priority date: 1987-12-02
Filing date: 1987-12-02
Publication date: 1989-08-09

Abstract

The utility model belongs to the technical field of plunger pumps, which adopts oil pumps and automatic reversing devices and changes rotary movement into reciprocal motion by directly making use of hydraulic energy, wherein, a control device carry out multiple control to a hydraulic pressure system by adopting hydraulic elements. The utility model has the advantages of simple structure, high efficiency, big low-tension output flow rate, high-pressure output flow rate stepless regulating and small frictional loss.

Description

Fluid-driving pressure-testing pump

The utility model belongs to the plunger pump technique field.

The existing motor test pump of Shi Yonging, be that mechanically operated horizontal four plungers are reciprocating type, it is made up of water vat, motor, transmission device etc., its motor is connected with worm screw, by making eccentric wheel promote slide block pair and crosshead shoe behind worm screw, the worm gear reducer, rotatablely moving of motor become to-and-fro motion.This hydraulic test pump complex structure, the mechanical transmission chain length, frictional loss is big, and the low pressure delivery efficiency is low, and the high pressure output flow can not be controlled.

The purpose of this utility model provides a kind of simple in structure, and the efficient height carries out the fluid transmission hydraulic test pump of various control easily.

The utility model is that the worm screw of transmission device in the common electric hydraulic test pump, worm gear, eccentric shaft, crosshead shoe etc. are removed, utilize oil pump, automatic reversing apparatus, one cover hydraulic system such as the actuator that control gear and high and low pressure water vat are formed replaces original mechanical transmission, utilize hydraulic pressure rotatablely moving of motor can be become the to-and-fro motion of oil cylinder piston, and the water vat that joins together of drive and oil cylinder piston (post) plug of living is reciprocating, make the sealed volume circulation change in the water vat and inhale, draining.

Oil pump 9 can adopt all kinds of fixed, the variable displacement pump of driven by motor.

Automatic reversing apparatus comprises two hydraulicchange-over valves 13,14 and

oil cylinder

3,15, and two hydraulicchange-over valves are to be constituted combination valve block and (also can be adopted the two-position four-way of two standards guiding valve that surges by two two-position four-ways guiding valve that surges; The logic cartridge valve; Or ball valve connecting mode).Two ends of oil cylinder are designed to buffer, antifluctuator cavity communicates with the pilot valve liquid controling cavity, the buffering high pressure that produces in the buffer is guided to the liquid controling cavity at pilot valve two ends in two hydraulicchange-over valves respectively, with the commutation of control pilot valve, the piston rod two ends of oil cylinder link to each other with water vat (post) alive plug respectively.High pressure water vat 16 is plunger cases, and plunger rod and oil cylinder piston bar make an integral body; Low pressure water vat 17 is piston cylinders, and piston rod and oil cylinder piston bar make an integral body, and there is the shaft shoulder diameter of axle and the binding thread that water vat piston 18 usefulness are installed the end of piston rod.The center of water vat piston 18 has with piston rod installs the mounting hole that the diameter of axle matches, and utilizes nut 19 that piston 18 is fixed on the shaft shoulder and the diameter of axle of piston rod.Nut 19 is in clamping piston 18, and the also rubber seal between clamping piston 18 and the piston rod 20 is with the leakage way between packed-piston mounting hole and the piston rod.Compress back nut (19) with cotter pin 21 location, prevent that it is loosening.High pressure water vat 16 and low pressure water vat 17 all are connected in the oil cylinder two ends respectively by carriage.

Control gear adopts the hydraulic element of standard, relief valve 7, and throttle valve 6 and selector valve 5 etc. advance system to oil-way system and carry out multistage pressure control, speed controlling of start-stop control automatically, cylinder piston motion etc. and reach corresponding control to output water.

Before the work, the spool of the guiding valve in two hydraulicchange-over valves 13 (pilot valve 1, selector valve 2) is in the left position (see figure 1) under spring action, during work, and pressure oil P ₀Enter the right chamber of oil cylinder 3 through selector valve 2, the left chamber of oil cylinder 3 leads to oil return, and piston 4 moves to left, simultaneously P ₀Enter pilot valve 1 and selector valve 2 right control chambeies, to keep the reliable of initial position, when piston 4 moves to the left end buffer, generation buffering high pressure P ' ₁, make P ' ₁Pressure P ' greater than the right-hand member buffer ₂, (P ' at this moment ₂=P ₀), P ' ₁Enter control chamber, pilot valve 1 left side, promote spool, the commutation that moves to right, after the commutation, oil return, P are connected in control chamber, the right side of selector valve 2 ₀Enter the left side control chamber of selector valve 2, promote selector valve 2 commutation that moves to right, make pressure oil P ₀Enter oil cylinder 3 left chambeies, oil cylinder 3 right-hand members take back oil, piston 4 moves to right, when moving to the right-hand member buffer, piston 4 can repeat above-mentioned action, the commutation action can be carried out automatically continuously, and the relief valve 7 of control set for adjusting can limit maximum pressure output (see figure 5), can make the high and low pressure oil cylinder open, stop by 2/2-way hydraulic control valve 5, series flow control valve 6 can be controlled the reciprocating speed of oil cylinder 15, reaches the flow of step-less adjustment high pressure output water.

The utility model is compared with motor test pump, have simple in structure, the efficient height, advantage such as the low pressure output flow is big, and high pressure output water flow can step-less adjustment, and frictional loss is little, it is reasonable in design, advanced.

Description of drawings:

Fig. 1 is an automatic reversing apparatus schematic diagram of the present utility model.

Fig. 2 is the functional symbol basis figure of Fig. 1.

Fig. 3 is a side-looking structural representation of the present utility model.

Fig. 4 is the plan view of Fig. 3.

Fig. 5 is functional symbol basis figure of the present utility model.

Accompanying drawing is an embodiment of the present utility model:

The frame of hydraulic test pump is made of water tank and fuel tank, the volume of fuel tank 11 is less than the volume of water tank 12, when hydraulic test pump is started working, the pressure oil content two-way of oil pump 9 outputs, one the tunnel by 5 blocking-up of 2/2-way hydraulic control valve, another Lu Jingshuan hydraulicchange-over valve 13 enters oil cylinder 3, makes it make piston 4 to-and-fro motion, and the reciprocating and output low-pressure water of the low pressure water vat piston that fuses of drive and piston rod 18.When delivery pressure during to 2MPa (this value can be adjusted), open two two logical hydraulic control valve 5 automatically, pressure oil P ₀Entering oil cylinder 15 by two hydraulicchange-over valves 14 makes oil cylinder piston reciprocating.And make the high pressure water cylinder plug bar to-and-fro motion that is integral with the oil cylinder piston work and discharge high pressure water, at this moment oil cylinder 3 quits work automatically.

The series flow control valve 6 of control gear can be controlled the reciprocating speed (see figure 5) of oil cylinder 15, thereby has controlled the output flow of high pressure water, reaches the rate of rise of step-less adjustment high pressure output.Regulate relief valve 7 and can limit maximum pressure output; Can make the high and low pressure oil cylinder open, stop by 2/2-way hydraulic control valve 5; Can carry out multistage pressure control to output water if increase relief valve; The boost pressure relay, the time relay can be controlled automatically, program control etc., the one-way valve 8 of water vat water inlet and outlet can be made the form of valve piece in groups.Oil cylinder, water vat and hydraulicchange-over valve can make standard piece, be easy to form the multiple product of different size and purposes, water-collecting machine 10, fuel tank 11, water tank 12 is the hydraulic test pump basic part, hydraulic element in the utility model change pneumatic element into, can be working medium with pressurized gas just, make hydraulic test pump work.

Claims

1, a kind of fluid transmission hydraulic test pump of forming by water vat, frame, motor and transmission device etc., it is characterized in that automatic reversing apparatus comprises two hydraulicchange-over valves and oil cylinder, two hydraulicchange-over valves are to be constituted combination valve block, made pilot valve and selector valve respectively by two two-position four-ways guiding valve that surges, two ends of oil cylinder are designed to buffer, antifluctuator cavity communicates with the pilot valve liquid controling cavity, and the piston rod two ends on the oil cylinder link to each other with water vat (post) alive plug respectively.

2, according to the described hydraulic test pump of claim 1, it is characterized in that frame is made of water tank and fuel tank, the volume of fuel tank is less than the volume of water tank.