CN218265885U

CN218265885U - Electro-hydraulic load sensor

Info

Publication number: CN218265885U
Application number: CN202222479490.0U
Authority: CN
Inventors: 高天龙; 翟爱国
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-20
Filing date: 2022-09-20
Publication date: 2023-01-10
Anticipated expiration: 2032-09-20

Abstract

The utility model discloses an electric hydraulic load sensor, which comprises a hydraulic oil tank, hydraulic oil, an oil pipeline, a high-pressure oil pump and a jack lifting plunger inside a main body; the electric appliance box is internally provided with a battery, a hydraulic sensor, a displacement sensor and a data acquisition and remote transmission unit; a U-shaped spring piece and a reed stopper are fixed at the front end of the main body, two plungers of the hydraulic jack can extend out of two round holes of the U-shaped spring piece, and a travel limit switch with a spring is embedded in the main body below the U-shaped spring piece; the device also comprises an electric cam mechanism, wherein the electric cam mechanism comprises an electric motor, a cam, a bearing, a thrust rod, a travel limit switch, a control circuit and a remote controller. The utility model discloses can solve that the work efficiency that traditional "manual cam mechanism of suppressing" exists is low, the operation difficulty and the degree of difficulty is big, dangerous and waste time and energy scheduling technical problem.

Description

Electro-hydraulic load sensor

Technical Field

The utility model relates to a portable load sensor is used in well logging.

Background

In the process of oil exploitation, the indicator diagram of the pumping unit needs to be measured frequently so as to diagnose the working condition of the plunger pump at thousands of meters underground. The load sensor is the equipment for measuring the hanging weight of the 'beam hanger' of the oil pumping unit, also called as the hanging weight load sensor, generally called as the load sensor for short, and is divided into a movable type and a fixed type, the utility model relates to a movable type load sensor. During measurement, the suspension load sensor is firstly placed in the upper clamp plate and the lower clamp plate of the rope hanger, and then the cam mechanism drives the high-pressure oil pump to enable the plunger of the hydraulic jack to extend out to a certain height, so that all loads can be loaded on the plunger of the sensor. In the prior art, a high-pressure oil pump is driven to load a load sensor in a manual pressurizing mode. Because the maximum hanging weight of the oil pumping unit can reach 150KN, the pumping can not be stopped generally during measurement, the rope hanger for placing the sensor is always in a vertical reciprocating motion state, a worker needs to stand on a Christmas tree, quickly inserts the hydraulic sensor into the rope hanger at a short time before and after the arrival of the bottom dead center for framing the stroke of the oil pumping unit, and quickly and continuously pulls the pressing rod for multiple times, so that the plunger of the hydraulic jack continuously extends out, and the test can not be formally started until the loading of all the hanging weights is successful. The time window of the bottom dead center is very short and is related to the stroke frequency of the pumping unit, so that workers often need to wait for several stroke frequencies to finish the pressurizing and loading operation and leave the Christmas tree at the wellhead to return to the ground for testing.

After the indicator diagram is tested, workers need to mount the Christmas tree again, wait for the arrival of the bottom dead center, rapidly operate the pressure relief rod to unload, and then take out the sensor to leave the Christmas tree and return to the ground.

It can be seen that in the whole process, workers need to stand on a wellhead Christmas tree for a long time, and the operations of inserting, pressing, releasing pressure, taking out and the like of the sensor are completed by one-hand operation. In particular, the lifting and pressing process is long, and often a plurality of stroke cycles are needed to complete the lifting and loading process, and sometimes the lifting and pressing process may be as long as several minutes. The labor intensity is low in efficiency, the biggest problem is that workers have to stand on the oil production tree with uneven twigs for a long time, and the workers can press the oil production tree quickly by using force with one hand on the premise that self balance is difficult to guarantee. This is a difficult to think of for loads with a maximum load of up to 150KN, which can drop from the christmas tree with little caution. In any case, the sensor is likely to slip, fall and fly out due to the influence of uneven stress, and the worker has great risk of being injured by a crashing object. Such safety accidents also happen in the actual production process.

Disclosure of Invention

The utility model aims at providing an electronic hydraulic pressure load sensor to solve the work efficiency that traditional "manual cam mechanism of suppressing" exists low, the operational difficulty and the degree of difficulty is big, dangerous and waste time and energy scheduling technical problem.

In order to achieve the purpose of the invention, the technical scheme adopted by the utility model is as follows:

an electric hydraulic load sensor comprises a hydraulic oil tank, hydraulic oil, an oil pipeline, a high-pressure oil pump, a jack lifting plunger, a manual pressure relief rod and a handle, wherein the hydraulic oil tank is arranged in a main body; a battery, a hydraulic sensor, a displacement sensor and a data acquisition and remote transmission unit are arranged in the electric appliance box; the front end of the main body is fixed with a U-shaped spring piece, the fixed end of the U-shaped spring piece is fixed into a clip angle shape, the free end is limited at a baffle at the inner end of the spring piece limiter, two plungers of the hydraulic jack can extend out from two round holes of the U-shaped spring piece, a travel limit switch embedded into the main body and provided with a spring is arranged below the U-shaped spring piece, one end of the spring abuts against a contact of the travel limit switch, the other end of the spring abuts against the inner side of the U-shaped spring piece, and the travel limit switch is electrically connected to a motor control and remote control unit in the electric appliance box from the inside of the main body through a lead; the hydraulic jack automatic lifting loading device is an electric cam mechanism, and the electric cam mechanism comprises an electric motor, a cam, a bearing, a thrust rod, a travel limit switch, a control circuit and a remote controller; the output end of the electric motor is connected with a cam, the cam is fixed on the bearing, the cam pushes a thrust rod to reciprocate, the thrust rod drives a high-pressure oil pump in a main body connected with the thrust rod, hydraulic oil is pumped into the high-pressure end of the jack to eject a plunger, and automatic lifting loading of a load is realized; when the load sensor is inserted into the rope hanger, the U spring piece is pressed to be closed, and the travel limit switch is in a preset opening or closing stable state; when the electric motor is started and the plunger reaches a set height, the travel limit switch reversely rotates to send an opposite switching value state signal, the motor control and remote control unit receives the signal to cut off the power supply of the electric motor, the high-pressure oil pump stops working, the automatic loading is completed, and the test waiting mode is entered. And detecting and counting pressure pulses through the corresponding relation between the extension height of the jack plunger and the stroke frequency of the high-pressure oil pump by the hydraulic sensor, and turning off the electric motor when the preset times are reached.

The fixed end of the U-shaped spring piece is fixed to form an included angle of 5-30 degrees.

The extending height of the hydraulic jack plunger is controlled between 2 mm and 20 mm.

The utility model discloses an advantage and positive effect:

firstly, when the operation, only need the workman to manometre make the down stroke come the time insert the polished rod eye to hydraulic sensor rapidly, can leave the danger area, then realize through the remote control mode that automatic the pressure is lifted the loading and carry out the indicator diagram test. Workers can evacuate the dangerous area quickly only by staying on the Christmas tree for a short time when the sensors are inserted and taken out, and safety risks are greatly reduced.

Secondly, greatly reduced workman intensity of labour, improved operating efficiency. The parameters of the pumping unit are different, stroke frequency is different, generally, the time from no-load pressing to full-load (the maximum possible time reaches 150 KN) manual pressing to full-load pressing is less than 100 seconds, the time for electric pressing is within 20 seconds, and the efficiency is improved by at least 5 times.

Drawings

FIG. 1 is an overall structure of the present invention;

fig. 2 is a side view of the present invention;

fig. 3 is a bottom view of the present invention.

Numbering in the figures: 1. the device comprises a bearing, 2, a cam, 3, an electric motor, 4, a dowel bar, 5, a protective shell, 6, a main body, 7, a falling safety pin, 8, a jack lifting plunger, 9, a manual pressure relief rod, 10, a handle, 11, a hydraulic sensor, 11c, a displacement sensor, 11d, a data acquisition and remote transmission unit, 11e, a motor control and remote control unit, 11f, a lead, 11g, a lead, 12, a U-shaped spring piece, 13, a travel limit switch, 14 and a spring piece limiter.

Detailed Description

An electric hydraulic load sensor comprises a hydraulic oil tank, hydraulic oil, an oil pipeline, a high-pressure oil pump, a jack lifting plunger, a manual pressure relief rod and a handle (the part is the same as the prior art, so the structure diagram is omitted); the electric appliance box is internally provided with a battery, a hydraulic sensor, a displacement sensor and a data acquisition and remote transmission unit; a U-shaped spring leaf is fixed at the front end of the main body, the fixed end of the U-shaped spring leaf is fixed at an included angle of 5-30 degrees, the free end is limited at the inner end of a far-end blocking piece of the reed limiter, two plungers of the hydraulic jack can extend out from two round holes of the U-shaped spring leaf, a travel limit switch with a spring is embedded in the main body below the U-shaped spring leaf, one end of the spring abuts against a contact of the travel limit switch, the other end of the spring abuts against the inner side of the U-shaped spring leaf, and the travel limit switch is electrically connected to a motor control and remote control unit in the electric appliance box from the inside of the main body through a lead; the hydraulic jack automatic lifting loading device is an electric cam mechanism, and the electric cam mechanism comprises an electric motor, a cam, a bearing, a thrust rod, a travel limit switch, a control circuit and a remote controller; the output end of the electric motor is connected with a cam, the cam is fixed on a bearing, the cam 2 pushes a thrust rod to reciprocate, the thrust rod drives a high-pressure oil pump in a main body connected with the thrust rod, hydraulic oil is pumped into the high-pressure end of the jack to eject a plunger, and automatic lifting loading of a load is realized; when the load sensor is inserted into the rope hanger, the U spring piece is pressed to be closed, and the travel limit switch is in a preset opening or closing stable state; when the electric motor is started and the plunger reaches a set height, the travel limit switch reversely rotates to send out an opposite switching value state signal, the motor control and remote control unit receives the signal to cut off the power supply of the electric motor, the high-pressure oil pump stops working, the automatic loading is completed, and the test waiting mode is entered. And detecting and counting pressure pulses through the corresponding relation between the extension height of the jack plunger and the stroke frequency of the high-pressure oil pump by the hydraulic sensor, and turning off the electric motor when the preset times are reached. The extending height of the hydraulic jack plunger is controlled between 5 mm and 20 mm. The motor control and remote control unit comprises: the device comprises a singlechip main control chip, a travel limit switch signal input circuit, a motor drive and switch control output circuit, a power circuit and a remote control circuit. When the singlechip main control chip receives a remote control starting instruction signal, a starting motor driving circuit supplies power outwards, and an electric motor starts to work; when the jack plunger reaches a set height, the single chip microcomputer main control chip receives a state reversal signal of the travel switch, the motor driving circuit cuts off power supply, and the electric motor stops working; when the main control chip of the singlechip receives the remote control stop instruction signal, the power supply can be interrupted at any time, so that the electric motor is forced to stop working; if the extending height of the plunger of the hydraulic jack is controlled by setting the fixed stroke frequency for the high-pressure oil pump, the power supply of the electric motor is cut off when the pressure pulse counting of the single-chip microcomputer main control chip to the hydraulic sensor is full, and the electric motor stops working.

According to the specific scheme, the extending height of the plunger of the hydraulic jack can be controlled by setting a fixed stroke frequency for the high-pressure oil pump. The liquid has incompressibility, the displacement of each stroke of the high-pressure oil pump is constant, and the stroke frequency of the high-pressure oil pump is strictly corresponding to the lifting height of the plunger of the hydraulic jack. The rising height of the plunger of the hydraulic jack can be controlled only by counting the pressure pulse measured by the hydraulic sensor and controlling the starting and stopping of the high-pressure oil pump.

Of course, the principle of a travel limit switch can also be adopted. The front end of the lower surface of the main body is fixedly provided with a U-shaped spring piece which forms a certain angle with the main body and a travel limit switch embedded in the main body and provided with a spring, and the travel limit switch enters the electrical appliance box through a lead and is connected with a motor control and remote control unit to realize start-stop control. When the plunger of the jack reaches a set height, the motor control and remote control unit immediately cuts off power supply when receiving a switching value state signal sent by the travel limit switch, the electric motor stops working, the lifting loading is completed, and then the test state of the indicator diagram is entered.

And after the indicator diagram test is finished, the load sensor is taken out after the pressure relief rod is manually operated to unload.

The utility model discloses a figure 1 is the outer bearing 1 of main part, cam 2, electric motor 3, dowel steel 4, protecting sheathing 5 and lets in the interior wire 11f isotructure sketch map of 11 in the electrical apparatus box, has increased electric machine control and remote control unit 11e simultaneously in electrical apparatus box 11.

Fig. 2 and 3 show the structures and installation positions of the travel limit switch 13 and its accessories. The front end of the main body is provided with a U-shaped spring leaf 12 and a reed stopper 14, the single end of which is fixed with an included angle of 5-30 degrees, two plungers 8 of the hydraulic jack can extend out of round holes of the U-shaped spring leaf, and a travel limit switch 13 with a spring, which is embedded in the main body 6 below the spring leaf, is connected to a motor control and remote control unit 11e in the electric appliance box 11 from the inside through a lead 11 g.

In practical implementation, the position of the limit travel switch 13 may be flexibly configured according to the overall configuration of the sensor, and is not necessarily installed at the position shown in the figure. The number of the switches is one, and two switches can be connected in parallel or in series. The switch type can be a mechanical contact switch, and can also be an optical, electric, magnetic and other detection switches.

The motor cam driving mechanism can be arranged on the side surface of the main body and also can be arranged in the electric appliance box, so that the structure is more compact.

The remote control mode can adopt radio frequency, infrared or laser emission and other modes.

Claims

1. An electric hydraulic load sensor comprises a hydraulic oil tank, hydraulic oil, an oil pipeline, a high-pressure oil pump, a jack lifting plunger, a manual pressure relief rod and a handle, wherein the hydraulic oil tank is arranged in a main body; the electric appliance box is internally provided with a battery, a hydraulic sensor, a displacement sensor and a data acquisition and remote transmission unit; it is characterized in that the preparation method is characterized in that,

the hydraulic jack is characterized in that a U-shaped spring piece is fixed at the front end of the main body, the fixed end of the U-shaped spring piece is fixed into a clip angle shape, the free end of the U-shaped spring piece is limited at a baffle at the inner end of the spring piece limiter, two plungers of the hydraulic jack can extend out from two round holes of the U-shaped spring piece, a stroke limit switch embedded into the main body and provided with a spring is arranged below the U-shaped spring piece, one end of the spring abuts against a contact of the stroke limit switch, the other end of the spring abuts against the inner side of the U-shaped spring piece, and the stroke limit switch is electrically connected to a motor control and remote control unit in the electric appliance box from the inside of the main body through a lead; the hydraulic jack automatic lifting loading device is an electric cam mechanism, and the electric cam mechanism comprises an electric motor, a cam, a bearing, a thrust rod, a travel limit switch, a control circuit and a remote controller; the output end of the electric motor is connected with a cam, the cam is fixed on the bearing, the cam pushes a thrust rod to reciprocate, the thrust rod drives a high-pressure oil pump in a main body connected with the thrust rod, hydraulic oil is pumped into the high-pressure end of the jack to eject a plunger, and automatic lifting loading of loads is achieved.

2. The electro-hydraulic load cell of claim 1, wherein the fixed end of the U-shaped spring plate is fixed at an angle of 5-30 degrees.

3. The electro-hydraulic load cell of claim 1, wherein the hydraulic jack plunger extension height is controlled between 2-20 mm.