High-stability hydraulic jack with safety valve

Abstract

The hydraulic jack with the safety valve is high in stability and comprises a shell barrel, an oil cylinder for storing hydraulic oil and a cylinder barrel capable of being provided with a piston rod are installed in the shell barrel, and a base is installed at the bottom of the shell barrel. A pipeline mechanism and a safety valve are installed in the base, and the pipeline mechanism is used for conveying hydraulic oil in the oil cylinder into the cylinder barrel. The hydraulic oil in the oil cylinder is pumped out through the pipeline mechanism by means of the hydraulic pump and conveyed into the cylinder barrel to push the piston rod to move upwards. When the oil pressure is larger than the maximum bearing pressure value of the jack, the safety valve can be compressed, hydraulic oil can flow back into the oil cylinder, and when the oil pressure is lower than the maximum bearing pressure value of the jack, the safety valve automatically returns, so that the hydraulic oil smoothly enters the cylinder barrel, and the hydraulic oil can flow back into the cylinder barrel within the maximum bearing pressure value range of the jack. Stable use of the jack is guaranteed, and safety accidents caused by damage of the jack due to large bearing pressure are avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to hydraulic jack technical field, concretely is a kind of high stability hydraulic jack with safety valve. BACKGROUND

[0002] Hydraulic jack is a kind of equipment using hydraulic principle to realize object hoisting, support or movement, and the working principle of hydraulic jack is based on Pascal's law, that is, in a closed container, the pressure of liquid is uniformly transmitted to every corner of the container, when a small force is applied to hydraulic oil, the pressure is transmitted to a larger area through hydraulic oil, thereby generating a larger force to lift heavy objects, it lifts or moves heavy objects by the force generated by hydraulic system, and is widely used in industry, construction, automobile maintenance and other fields.

[0003] At present, hydraulic jack only discharges through pressure relief valve, when the weight supported by the hydraulic jack is greater than the bearing pressure of the hydraulic jack, it cannot discharge in time, which easily causes damage to the jack and safety accidents.

[0004] Therefore, a kind of high stability hydraulic jack with safety valve is proposed to solve the above problems. UTILITY MODEL CONTENTS

[0005] 1. Technical problem to be solved by the utility model

[0006] In view of the deficiencies of the prior art, the utility model aims to provide a kind of high stability hydraulic jack with safety valve, to solve the problem that the hydraulic jack only discharges through pressure relief valve in the prior art, when the weight supported by the hydraulic jack is greater than the bearing pressure of the hydraulic jack, it cannot discharge in time, which easily causes damage to the jack and safety accidents.

[0007] Technical scheme

[0008] To achieve the above object, the utility model provides the following technical scheme:

[0009] A kind of high stability hydraulic jack with safety valve, including shell cylinder, the inside of the shell cylinder is installed with the oil cylinder of storing hydraulic oil and the cylinder barrel that can be installed with piston rod, the bottom of the shell cylinder is installed with base, the inside of the base is installed with the pipeline mechanism for conveying the hydraulic oil in oil cylinder into cylinder barrel and safety valve, the safety valve can automatically open pressure relief when the oil pressure conveyed into cylinder barrel by pipeline mechanism exceeds maximum range value.

[0010] As the preferred scheme of the utility model, the base is installed on the steel base plate, and the manual hydraulic pump is also installed on the base plate.

[0011] As the preferred scheme of the utility model, the cylinder is installed at the inside bottom center of the shell cylinder, the oil cylinder has two and is installed on the two side faces of the cylinder respectively, the two cylinder is communicated through the metal pipe, the outside face of the shell cylinder is provided with an oil inlet opening with a threaded bolt.

[0012] As the preferred scheme of the utility model, the pipeline mechanism is provided with an oil pressure pipe, the oil pressure pipe outer ring face one side is connected with an oil discharge pipe, the oil discharge pipe is provided with a one-way valve one, the top of the oil discharge pipe is provided with an oil inlet pipe, the oil inlet pipe is provided with a one-way valve two, one end of the oil inlet pipe is connected with the bottom of an oil cylinder, the other end of the oil discharge pipe and the oil inlet pipe are connected with the hydraulic pump.

[0013] As the preferred scheme of the utility model, the top center of the oil pressure pipe is connected with an oil supply pipe, the top of the oil supply pipe is connected with the bottom of the cylinder, one end of the top of the oil pressure pipe is connected with an oil return pressure relief pipe, the oil return pressure relief pipe is connected with the bottom of another oil cylinder, the safety valve is installed in the inside of the oil pressure pipe between the connecting port of the oil supply pipe and the oil return pressure relief pipe.

[0014] As the preferred scheme of the utility model, the outer ring face of the base is threadedly connected with a pressure relief valve, one end of the pressure relief valve is inserted into the inside of the oil pressure pipe and is connected with one end of the safety valve, the safety valve is extruded into the inside of the connecting port of the oil return pressure relief pipe and the oil pressure pipe after being pressed beyond the limit. Advantageous effects

[0015] Compared with the prior art, the utility model has the beneficial effects that:

[0016] The utility model discloses a pipeline mechanism utilizes the hydraulic pump to pump out the hydraulic oil in the oil cylinder and transports to the inside of the cylinder, pushes the piston rod to move upwards, in the process of the hydraulic pump conveying the hydraulic oil, if the oil pressure in the pipeline mechanism is greater than the maximum bearing pressure value of the jack, the safety valve is compressed, at this moment, the hydraulic oil in the pipeline mechanism returns to the inside of the oil cylinder and reaches the purpose of pressure relief, and when the oil pressure is lower than the maximum bearing force value of the jack, the safety valve is automatically reset, and the hydraulic oil enters the cylinder smoothly, thereby guaranteeing the stable use of the jack in the maximum bearing pressure value range of the jack, avoiding the damage of the jack caused by the large bearing pressure and the safety accident. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is whole structure schematic diagram of the utility model discloses a kind of high stability hydraulic jack with safety valve;

[0018] Figure 2 It is shell cylinder section structure schematic diagram of the utility model discloses a kind of high stability hydraulic jack with safety valve;

[0019] Figure 3 The utility model discloses a high stability relief valve and safety valve amplification structure schematic diagram of hydraulic jack with safety valve.

[0020] In the drawing: 1, shell cylinder;11, cylinder barrel;12, oil cylinder;13, guide pipe;2, base;21, relief valve;22, safety valve;3, pipeline mechanism;31, oil pressure pipe;32, oil discharge pipe;33, check valve one;34, oil inlet pipe;35, check valve two;36, oil supply pipe;37, oil return relief pipe. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the utility model. EMBODIMENT

[0022] Please refer to Figures 1-3 The utility model discloses a high stability hydraulic jack with safety valve, including shell cylinder 1, the inside installation of shell cylinder 1 has the oil cylinder 12 of storage hydraulic oil and the cylinder barrel 11 of the piston rod can be installed, the bottom of shell cylinder 1 is installed with base 2, the inside installation of base 2 has the pipeline mechanism 3 for the hydraulic oil in oil cylinder 12 is delivered into cylinder barrel 11 and safety valve 22, safety valve 22 can open pressure relief automatically when the oil pressure that pipeline mechanism 3 delivers into cylinder barrel 11 exceeds the maximum range value, this high stability hydraulic jack with safety valve when using, through pipeline mechanism 3 utilizes hydraulic pump and sends to the inside cylinder barrel 11 of oil cylinder 12 and pushes the piston rod and moves upwards with the hydraulic oil of oil cylinder 12, in the process of hydraulic pump delivery hydraulic oil, if the oil pressure in pipeline mechanism 3 is greater than the maximum pressure value that the jack bears, safety valve 22 will be compressed, at this moment, the hydraulic oil in pipeline mechanism 3 will flow back to the inside of oil cylinder 12 and reach the purpose of pressure relief, and when the oil pressure is lower than the maximum bearing force value of jack, safety valve 22 is automatically reset, so that the hydraulic oil enters cylinder barrel 11 smoothly, thereby in the maximum pressure value range of the jack, the stable use of jack is guaranteed, and the damage of jack caused by the relatively large bearing pressure is avoided, and safety accidents occur.

[0023] In the embodiment, as Figure 3As shown, the pipeline mechanism 3 is installed with an oil pressure pipe 31, the outer ring surface of the oil pressure pipe 31 is connected with a discharge pipe 32, the discharge pipe 32 is sleeved with a one-way valve 1 33, the top of the discharge pipe 32 is installed with an inlet pipe 34, the inlet pipe 34 is sleeved with a one-way valve 2 35, one end of the inlet pipe 34 is connected with the bottom of an oil cylinder 12, the other end of the discharge pipe 32 and the inlet pipe 34 are connected with a hydraulic pump, the oil in the oil cylinder 12 can be pumped into the hydraulic pump through the inlet pipe 34, and then the hydraulic oil is discharged into the oil pressure pipe 31 through the discharge pipe 32 to generate a certain pressure.

[0024] In this embodiment, as shown in Figure 2 and Figure 3 , the top center of the oil pressure pipe 31 is connected with a supply pipe 36, the top of the supply pipe 36 is connected with the bottom of the cylinder barrel 11, one end of the top of the oil pressure pipe 31 is connected with a return oil pressure relief pipe 37, the return oil pressure relief pipe 37 is connected with the bottom of the other oil cylinder 12, and the safety valve 22 is installed on the inner side of the oil pressure pipe 31 between the connection port of the supply pipe 36 and the return oil pressure relief pipe 37, so when the discharge pipe 32 injects hydraulic oil into the oil pressure pipe 31, under the action of the safety valve 22, the hydraulic oil enters the inside of the cylinder barrel 11 through the supply pipe 36, and the piston rod is lifted upward.

[0025] In this embodiment, as shown in Figure 1 , Figure 2 and Figure 3 , the outer ring surface of the base 2 is threadedly connected with a pressure relief valve 21, one end of the pressure relief valve 21 extends into the inside of the oil pressure pipe 31 and is connected with one end of the safety valve 22, and when the safety valve 22 is pressed beyond the limit, it will be pressed into the inside of the connection port of the return oil pressure relief pipe 37 and the oil pressure pipe 31, so that when the safety valve 22 is pressed beyond the limit, the hydraulic oil enters the oil cylinder 12 through the return oil pressure relief pipe 37, thereby realizing automatic pressure relief, and when the pressure is released to the normal pressure value, the safety valve 22 is automatically reset, and the hydraulic oil continues to act on the piston rod.

[0026] Working principle: when the hydraulic jack with high stability and safety valve is used, the oil in the oil cylinder 12 can be pumped into the hydraulic pump through the inlet pipe 34, and then the hydraulic oil is discharged into the oil pressure pipe 31 through the discharge pipe 32 to generate a certain pressure, when the discharge pipe 32 injects hydraulic oil into the oil pressure pipe 31, under the action of the safety valve 22, the hydraulic oil enters the inside of the cylinder barrel 11 through the supply pipe 36, and the piston rod is lifted upward, when the safety valve 22 is pressed beyond the limit, the hydraulic oil enters the oil cylinder 12 through the return oil pressure relief pipe 37, thereby realizing automatic pressure relief, and when the pressure is released to the normal pressure value, the safety valve 22 is automatically reset, and the hydraulic oil continues to act on the piston rod, thereby ensuring the stable use of the jack within the maximum bearing pressure value of the jack, avoiding the damage of the jack caused by the large bearing pressure and the safety accidents.

[0027] All the technical features in the embodiments can be combined freely according to actual needs.

[0028] The above embodiments are the preferred implementation of the present application, in addition to this, the present application can be implemented in other ways, without departing from the technical scheme concept, any obvious replacement is within the protection scope of the present application.

Claims

1. A hydraulic jack with a safety valve having high stability, comprising a shell cylinder (1), characterized in that: The inside of the shell cylinder (1) is provided with an oil cylinder (12) for storing hydraulic oil and a cylinder barrel (11) capable of mounting a piston rod, the bottom of the shell cylinder (1) is provided with a base (2), the inside of the base (2) is provided with a pipeline mechanism (3) for delivering hydraulic oil in the oil cylinder (12) into the cylinder barrel (11) and a safety valve (22), the safety valve (22) can be automatically opened to release pressure when the oil pressure delivered by the pipeline mechanism (3) into the cylinder barrel (11) exceeds the maximum range value.

2. The hydraulic jack with a safety valve having high stability according to claim 1, characterized in that: The base (2) is installed on a steel bottom plate, and a manual hydraulic pump is also installed on the bottom plate.

3. The hydraulic jack with a safety valve having high stability according to claim 1, characterized in that: The cylinder barrel (11) is installed at the inside bottom center of the shell cylinder (1), the oil cylinder (12) is provided with two cylinders respectively installed on the two side surfaces of the cylinder barrel (11), the two cylinder barrels (11) are communicated through a metal pipe, and an oil filling port provided with a threaded bolt is formed on the outer surface of the shell cylinder (1).

4. The hydraulic jack with a safety valve having high stability according to claim 1, characterized in that: The pipeline mechanism (3) is provided with an oil pressure pipe (31), the outer ring surface of the oil pressure pipe (31) is connected with a drain pipe (32), the drain pipe (32) is provided with a one-way valve I (33) sleeved and installed thereon, the top of the drain pipe (32) is provided with an oil inlet pipe (34), the oil inlet pipe (34) is provided with a one-way valve II (35) sleeved and installed thereon, one end of the oil inlet pipe (34) is connected with the bottom of one oil cylinder (12), and the other ends of the drain pipe (32) and the oil inlet pipe (34) are connected with a hydraulic pump.

5. The hydraulic jack with a safety valve according to claim 4, characterized in that: The top center of the oil pressure pipe (31) is connected with a oil supply pipe (36), the top of the oil supply pipe (36) is connected with the bottom of the cylinder barrel (11), one end of the top of the oil pressure pipe (31) is connected with an oil return pressure relief pipe (37), the oil return pressure relief pipe (37) is connected with the bottom of the other oil cylinder (12), and the safety valve (22) is installed inside the oil pressure pipe (31) between the connection ports of the oil supply pipe (36) and the oil return pressure relief pipe (37).

6. The hydraulic jack with a safety valve having high stability according to claim 1, characterized in that: The outer ring surface of the base (2) is threadedly connected with a pressure relief valve (21), one end of the pressure relief valve (21) extends into the inside of the oil pressure pipe (31) and is connected with one end of the safety valve (22), and the safety valve (22) is extruded into the inside of the connection port of the oil return pressure relief pipe (37) and the oil pressure pipe (31) when the pressure exceeds the limit.

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