CN202007654U - Hydraulic pumping unit with pressure compensation device - Google Patents

Hydraulic pumping unit with pressure compensation device Download PDF

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Publication number
CN202007654U
CN202007654U CN2011200920265U CN201120092026U CN202007654U CN 202007654 U CN202007654 U CN 202007654U CN 2011200920265 U CN2011200920265 U CN 2011200920265U CN 201120092026 U CN201120092026 U CN 201120092026U CN 202007654 U CN202007654 U CN 202007654U
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CN
China
Prior art keywords
hydraulic
pressure
oil
pump
pumping unit
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Application number
CN2011200920265U
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Chinese (zh)
Inventor
孙茂意
孙阳阳
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孙茂意
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Priority to CN2011200920265U priority Critical patent/CN202007654U/en
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Publication of CN202007654U publication Critical patent/CN202007654U/en

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Abstract

The utility model discloses a hydraulic pumping unit with a pressure compensation device, which is provided with a high-pressure oil tank, an oil supplementing pressure pump and an overflow valve, wherein the oil supplementing pressure pump provides initial pressure for the high-pressure oil tank. A first hydraulic pump and a second hydraulic pump are parallelly connected onto the hydraulic pumping unit; oil outlets of the two pumps are connected with a group of return circuits of a three-position two-way valve and simultaneously parallelly connected with a first energy accumulator, a second energy accumulator, the overflow valve, an adjustable throttling valve and a pressure relay; an oil outlet of the three-position two-way valve is communicated with a first hydraulic cylinder and a second hydraulic cylinder which are in parallel connection and connected with the pumping unit; a second group of passages among the two hydraulic cylinders and the high-pressure oil tank is communicated by another group of return circuits of the three-position two-way valve; and an energy accumulation buffer is connected onto the high-pressure oil tank. The hydraulic pumping unit has the advantages that when the pumping unit returns and the gravity of a sucker rod forces the hydraulic cylinders to return hydraulic oil in the hydraulic cylinders through the return circuits, the energy accumulation buffer sucks the hydraulic oil which is drained out of the hydraulic cylinders and cannot be sucked by the hydraulic pumps, so that pressure in the high-pressure oil tank is kept basically stable and the purposes of saving energy and reducing consumption are achieved.

Description

A kind of hydraulic pumping unit with pressure compensator

Technical field

The utility model belongs to petroleum recovering equipment, and definite saying is a kind of hydraulic pumping unit with pressure compensator.

Background technology

For a long time, people have carried out a lot of research to hydraulic oil producing, attempt to replace traditional mechanical type beam-pumping unit with the mode of hydraulic pressure.But, can be applied to the few of actual oil recovery production because the starting point and the purpose of research are not quite similar separately.To such an extent as to still adopt the great mechanical type beam-pumping unit of energy consumption at present.Wherein Zhejiang University's patent No. is: ZL94202508.3, name is called: the energy-saving hydraulic oil pumper.Wherein disclose and adopted nitrogen to charge into conduct after compression as the power source of accumulator as the up oil pumping of sucker rod, the hydraulic pressure that the gravitional force of self produced when sucker rod was descending can be squeezed into the power of accumulator as oil pumping next time workmanship.This is feasible in theory, but but can't realize in actual applications.Particularly, because in the real work, the time of the descending backhaul of sucker rod is short, unnecessary hydraulic oil has no idea all to get back in the accumulator at all, so this device can not be realized continuous operation.For make hydraulic system can reasonably use with oil pumper in and can obtain long stable operation, designer of the present utility model has done in earnest research, has proposed goal of the invention of the present utility model.

The utility model content

Goal of the invention of the present utility model is unreasonable in order to overcome the using energy source that present hydraulic pumping unit exists, and energy consumption is bigger than normal, and running time, short problem put forward.A kind of hydraulic pumping unit with pressure compensator promptly is provided.

Technical solution of the present utility model is to realize like this, this has the hydraulic pumping unit of pressure compensator, these facility have pressure-oil tank, repairing force (forcing) pump and the overflow valve and the oil pumper of initial pressure are provided for pressure-oil tank, its distinguishing characteristics be on pressure-oil tank, to be connected in parallel first hydraulic pump and second hydraulic pump, the oil-out of first hydraulic pump and second hydraulic pump is connected one group of loop of three two-port valves, while first accumulator in parallel and second accumulator and overflow valve and adjustable throttling and pressure switch, the oil-out of three two-port valves is communicated with first hydraulic cylinder that is connected with oil pumper and second hydraulic cylinder in parallel, second group of path between first hydraulic cylinder and second hydraulic cylinder and the pressure-oil tank is by another group circuit communication of three two-port valves, second group of path between first hydraulic cylinder and second hydraulic cylinder, this two hydraulic cylinder and pressure-oil tank is connected an accumulator buffer by another group circuit communication of three two-port valves on pressure-oil tank.First hydraulic cylinder in parallel and second group of path between second hydraulic cylinder and the pressure-oil tank are by another group circuit communication of three two-port valves.

Beneficial technical effects of the present utility model is: when the oil pumper backhaul, the gravity of sucker rod and annex forces hydraulic cylinder that the hydraulic oil in it is turned back to hydraulic system by the loop, at this moment, the hydraulic oil that accumulator buffer can not all suck the hydraulic pump of discharging in the acceptable solution cylinder pressure, thereby the pressure in the maintenance pressure-oil tank is basicly stable, reaches energy saving purposes.

Description of drawings

Accompanying drawing is the structural principle schematic views of hydraulic system of the present utility model and oil pumper.In the accompanying drawings: 1, pressure-oil tank, 2, the repairing force (forcing) pump, 3, overflow valve, 4, first hydraulic pump, 5, second hydraulic pump, 6, overflow valve, 7, first accumulator, 8, second accumulator, 9, adjustable throttling, 10, three two-port valves, 11, manual three two-port valves, 12, pressure switch, 13, hydraulic stroke switch, 14, the stroke relay, 15, first hydraulic cylinder, 16, second hydraulic cylinder, 17, the buffering accumulator, 18, oil pumper.

The specific embodiment

Below in conjunction with the embodiment that provides in the accompanying drawing, structure of the present utility model and use are elaborated.With reference to accompanying drawing, this has the hydraulic pumping unit of pressure compensator, has pressure-oil tank (1), the repairing force (forcing) pump (2) and the overflow valve (3) of initial pressure are provided for pressure-oil tank, first hydraulic pump (4) and second hydraulic pump (5) is characterized in that being connected in parallel on pressure-oil tank, the oil-out of first hydraulic pump and second hydraulic pump is connected one group of loop of one three two-port valves (10), while first accumulator in parallel (7) and second accumulator (8) and overflow valve (6) and adjustable throttling (9) and pressure switch (12), the oil-out of three two-port valves is communicated with first hydraulic cylinder (15) that is connected with oil pumper and second hydraulic cylinder (16) in parallel, first hydraulic cylinder (15) in parallel and second group of path between second hydraulic cylinder (16) and the pressure-oil tank (1) connect an accumulator buffer (17) by another group circuit communication of three two-port valves (10) on pressure-oil tank.

As its improvement, oil-out at said first hydraulic pump (4) that is connected in parallel and second hydraulic pump (5) is connected a two position two-way valve, and first hydraulic cylinder (15) in parallel and second hydraulic cylinder (16) are connected another two position two-way valve with second group of path between the pressure-oil tank (1).Like this, control the oil-feed and the oil return of hydraulic cylinder respectively, increased Hydraulic Elements to the eye, still, but high pressure and low pressure can be controlled respectively, for the selection of Hydraulic Elements with have bigger superiority application life by two reversal valves.

As the improvement of association, the hydraulic cylinder of its said parallel connection can be more than 2.If, adopt single hydraulic cylinder also can realize work purpose of the present utility model fully just to the purpose that can realize work.In actual the use, hydraulic cylinder adopts rotation alternation system, for example: under the normal condition, each hydraulic cylinder works 8 hours, like this, two hydraulic cylinders can obtain comparatively reasonably frequency of utilization, to increase its application life.Is the same more than two cylinders its effect in parallel with two cylinders, for example: adopt 3 or 4 hydraulic jack shunt sequence work.Only increase the down time of each cylinder, still, whole oil pumper cost will increase.The thing that it may be noted that, these two or more hydraulic cylinder can be worked simultaneously, to increase the stroke of oil pumper.

The same, the hydraulic pump of its said parallel connection can be more than 2.Same as described above, if, adopt single hydraulic pump also can realize work purpose of the present utility model fully just to the purpose that can realize work.In actual the use, hydraulic pump adopts the one after the other duty, for example: under the normal condition, each hydraulic pump works 8 hours, like this, two hydraulic pumps can obtain frequency of utilization preferably, to increase its application life.Is the same more than its effect of two parallels connection of pumps with two pumps, for example: adopt 3 or 4 hydraulic oil pump shunt sequence work.Only increase the down time of each pump, still, whole oil pumper cost will increase.

Its said hydraulic cylinder can be the piston-type hydro compressing cylinder, also can be the plunger hydraulic oil cylinder.The preferential employing plunger hydraulic oil cylinder of recommending.

Its said hydraulic pump is gear type hydraulic oil pump or plunger hydraulic oil pump.The preferential employing plunger hydraulic oil pump of recommending.The west describes the whole system operation process, so that understand the handling characteristics of this device better.

Petroleum extractor is a kind of machinery of long-term continuous operation, and sucker rod rises, descend very that the simple harmonic motion of rule provides extraordinary condition for the utilization of this hydraulic system energy.

The dynamicliquid pressure oil of this device is mainly derived from by motor-operated first hydraulic planger pump (3) or second hydraulic planger pump (4), plunger displacement pump (3) and (4) are duplex pump in parallel, be according to continuous running of normal phase of equipment working condition requirement, oil supply system is provided with stand by pump, adopt many pumps rotation system, prolong the application life and the maintenance period of hydraulic pump; Before this pump pump of two, the stop valve behind the pump plays idle pump the be not stressed effect of oil and the effect of convenient single pump maintenance of making.In hydraulic cylinder (15) or (16) operate as normal, when piston rose (process), hydraulic pump (4) or (5) and first accumulator (7) and second accumulator (8) provided pressure oil through the loop, left side of three two-port valves for hydraulic cylinder; When piston descends (backhaul), hydraulic pump (4) or (5) work on, the hydraulic oil that is provided is by accumulator (7) and (8) savings, and the pressure oil that forms during backward stroke of the piston returns pressure-oil tank (24) through another loop, road of three two-port valves, for the inlet port of plunger displacement pump (4) or (5) provides hydraulic oil.Because hydraulic cylinder is short return interval, recirculating oil quantity is big, so the accumulation of energy of buffering accumulator (17) is set on pressure-oil tank; Overflow valve (6) is to set up main system pressure, because oil pumper is continuous operation, be energy conservation, should realize not having overfall working condition work during the hydraulic system operate as normal, so the discharge value parameter of design overflow valve is about the 30-40% of main system discharge value, to cooperate the work of pressure switch (12).The effect of pressure switch (12) is the security of system protection; set for system works is unusual; as oil pumping machine oil pumping be hampered, reason such as accessory damage makes system can't operate as normal the time; plunger displacement pump (4) or (5) all overflows from overflow valve (6) of oil of confession; because overflow valve (6) discharge value is too little; hydraulic system pressure is raise rapidly, and system cut-off stops when arriving pressure switch (12) setting pressure, the work of switching on again after waiting the attendant to fix a breakdown.Adjustable throttling (9) is adjusted the speed of hydraulic cylinder (15) or (16) process; The pressure of adjusting pressure-oil tank (24) can be controlled the speed of hydraulic cylinder (15) or (16) backhaul.Three two way selected valves (10) are the main changements of control hydraulic cylinder (15) or (16) round trip, its commutation is controlled to be commutation of electric liquid or liquid controlled reversing: during electric liquid commutation, the relay signal comes from the given signal of stroke relay relay (14) (also can service time dynamo-electric device); During liquid controlled reversing, hydraulic stroke switch (13) three two way selected valves of control (10) commutation.When the main effect of hand-operated direction valve (11) is non-normal working to the adjustment of system, the adjustment when for example system just moves, exhaust, microinching during the oil pumper maintenance and fine setting etc. cooperate mobile walking beam, horse head, pylon oil cylinder they to be moved etc. during fault.

So just realized piston or ram lift operate as normal during the work lift of oil pumper just, when fire or plunger backhaul, during oil pumper backhaul just, the oil that hydraulic pressure pumps is by accumulator (7) and (8) savings, and the oil with certain hydraulic pressure energy that the self-hydraulic cylinder is discharged under the effect of sucker rod gravitional force fast enters into pressure-oil tank, that part of oil that hydraulic pump can not in time suck is by buffering accumulator (17) savings.At system's mesohigh, low-pressure section while stored energy, thereby realized purpose of energy saving.

For general hydraulic system, the driving power that exists hydraulic pump is with reference to formula:

P = Δ P p · q vp η p In the formula:

P: the driving power of hydraulic pump;

Δ P p=p-P xPressure differential between hydraulic pressure pump intake and the outlet opening, p: discharge pressure, P x: suction pressure;

q Vp: the flow of hydraulic pump;

η p: the gross efficiency of hydraulic pump.

By following formula as seen, hydraulic pump power is directly proportional with the pressure differential of its suction, oil drain out, and when discharge pressure was constant, high more then this pressure differential of suction pressure was more little, and then correspondingly consumption of power is then more little.Therefore adopt pressure-oil tank that the low pressure oil with certain pressure is provided for hydraulic pump, improve suction pressure for hydraulic pump to a certain extent, have bigger energy conservation and consumption reduction effects theoretically, and also confirmed through verification experimental verification by our experimental facilities.

Claims (6)

1. hydraulic pumping unit with pressure compensator, these facility have pressure-oil tank (1), the repairing force (forcing) pump (2) and the overflow valve (3) of initial pressure are provided for pressure-oil tank, first hydraulic pump (4) and second hydraulic pump (5) is characterized in that being connected in parallel on pressure-oil tank, the oil-out of first hydraulic pump and second hydraulic pump is connected one group of loop of one three two-port valves (10), while first accumulator in parallel (7) and second accumulator (8) and overflow valve (6) and adjustable throttling (9) and pressure switch (12), the oil-out of three two-port valves is communicated with first hydraulic cylinder (15) that is connected with oil pumper and second hydraulic cylinder (16) in parallel, first hydraulic cylinder (15) in parallel and second group of path between second hydraulic cylinder (16) and the pressure-oil tank (1) connect an accumulator buffer (17) by another group circuit communication of three two-port valves (10) on pressure-oil tank.
2. according to the described a kind of hydraulic pumping unit of claim 1 with pressure compensator, the oil-out that it is characterized in that said first hydraulic pump (4) that is connected in parallel and second hydraulic pump (5) is connected a two position two-way valve, and first hydraulic cylinder (15) in parallel and second hydraulic cylinder (16) are connected another two position two-way valve with second group of path between the pressure-oil tank (1).
3. according to the described a kind of hydraulic pumping unit of claim 1, it is characterized in that the hydraulic cylinder of said parallel connection can be more than 2 with pressure compensator.
4. according to the described a kind of hydraulic pumping unit of claim 1, it is characterized in that the hydraulic pump of said parallel connection can be more than 2 with pressure compensator.
5. according to the described a kind of hydraulic pumping unit of claim 1, it is characterized in that said hydraulic cylinder is the plunger hydraulic oil cylinder with pressure compensator.
6. according to the described a kind of hydraulic pumping unit of claim 1, it is characterized in that said hydraulic pump is the plunger hydraulic oil pump with pressure compensator.
CN2011200920265U 2011-04-01 2011-04-01 Hydraulic pumping unit with pressure compensation device CN202007654U (en)

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Application Number Priority Date Filing Date Title
CN2011200920265U CN202007654U (en) 2011-04-01 2011-04-01 Hydraulic pumping unit with pressure compensation device

Publications (1)

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Cited By (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102168540A (en) * 2011-04-01 2011-08-31 孙茂意 Hydraulic pumping unit with pressure compensation device
CN103867533A (en) * 2014-03-26 2014-06-18 上海电气液压气动有限公司 Hydraulic test system of railway tamping device
CN104214142A (en) * 2014-08-26 2014-12-17 三一重型能源装备有限公司 Manifold truck and hydraulic control system thereof
CN110388357A (en) * 2019-08-06 2019-10-29 海洋石油工程股份有限公司 Underwater hydraulic oil recovery system

Cited By (6)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CN102168540A (en) * 2011-04-01 2011-08-31 孙茂意 Hydraulic pumping unit with pressure compensation device
CN102168540B (en) * 2011-04-01 2014-11-19 孙茂意 Hydraulic pumping unit with pressure compensation device
CN103867533A (en) * 2014-03-26 2014-06-18 上海电气液压气动有限公司 Hydraulic test system of railway tamping device
CN103867533B (en) * 2014-03-26 2016-04-27 上海电气液压气动有限公司 A kind of hydraulic test system of railway tamping unit
CN104214142A (en) * 2014-08-26 2014-12-17 三一重型能源装备有限公司 Manifold truck and hydraulic control system thereof
CN110388357A (en) * 2019-08-06 2019-10-29 海洋石油工程股份有限公司 Underwater hydraulic oil recovery system

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