CN201794561U

CN201794561U - Novel tower frame type beam-pumping unit

Info

Publication number: CN201794561U
Application number: CN2010202709293U
Authority: CN
Inventors: 马丙辉
Original assignee: Individual
Current assignee: Individual
Priority date: 2010-07-26
Filing date: 2010-07-26
Publication date: 2011-04-13
Anticipated expiration: 2020-07-26

Abstract

The utility model discloses a novel tower frame type beam-pumping unit, wherein a tractor arranged on a tower frame is linked with a pumping rod and a counter balance by a transmission mechanism consisting of a traction wheel and a combination guide wheel, wherein the traction wheel is connected with the tractor, and the combination guide wheel is arranged at one side of the traction wheel and consists of a large guide wheel and a small guide wheel that are coaxially arranged; a first traction rope, a second traction rope and a third traction rope are arranged respectively between the traction wheel and the large guide wheel, between the small guide wheel and the pumping rod and between the traction wheel and the counter balance; the traction ropes are superposed and wound on the traction wheel and the combination guide wheel. Therefore, the winding radius of the traction ropes is changeable, thus avoiding unnecessary amount of work of the tractor in ascending stroke; simultaneously, the transmission mechanism adopting a winding mode avoids the slippage of the traction ropes, thus improving the safety and power transmission efficiency; and the counter balance has short stroke, thus being beneficial to reducing the height of the tower frame.

Description

A kind of novel tower shelf type oil pumping machine

Technical field

The utility model relates to a kind of oil exploration equipment, especially relates to a kind of oil pumper of tower-type.

Background technology

At present, in technical field of petroleum extraction, tower shelf type oil pumping machine has obtained using widely, and its common structure is as follows: drive traction sheave after traction machine (motor) slows down by reducing gear and rotate, be arranged with pull rope on the traction sheave, the pull rope two ends connect sucker rod and balancing weight respectively.The rotation of traction machine is slowed down to increase through reducing gear and is turned round the rotation of back drive traction sheave, thereby driving sucker rod by the pull rope of winding on traction sheave rises to finish oil pumping, balancing weight discharges the potential energy that stores and is used for the service hoisting sucker rod, to reduce the starting torque of traction machine, when arriving on the stroke, sucker rod prescribes a time limit, controlling organization control traction machine backward rotation, and this moment, sucker rod descended, balancing weight rises, and traction machine does work with storage of potential energy to balancing weight.Do action so, sucker rod are promptly finished and are continued oil pumping.

What reducing gear usually adopted is belt transmission and gear reduction box, because the volume of gear reduction box is bigger, its manufacture difficulty is big, the cost height, and also reduction box can produce bigger noise in the running, and its maintaining workload at ordinary times is big, is not easy to maintenance.And belt transmission is skidded easily, thereby causes the brake failure of traction sheave and security incident takes place.In addition, sucker rod is in rising and descending stroke, its required tractive force comprises the weight of sucker rod, the weight of oil and the frictional force of whole transmission mechanism, because the weight of oil progressively alleviates, and frictional force is opposite with the direction of motion of sucker rod, therefore, linear change between the minimum value Fmin that prescribes a time limit under maximum value Fmax that the tractive force (polished rod load) of rod end can be when upstroke be just started and the down stroke arrival is used to pump, and in order to reduce the peak torque of traction machine as far as possible, the tractive force that common weight W with balancing weight is a balancing weight is arranged on the average of above-mentioned maximum value and minimum value, be W=(Fmax+Fmin)/2, and then the power and the specification of reduction traction machine, help reducing cost.Because the tractive force that balancing weight produced is invariable, traction machine is in the upstroke that promotes sucker rod, and during ground zero, the tractive force that balancing weight provided is less than the required tractive force of oil pumping rod end, this moment, traction machine was made positive work to sucker rod, played the traction enhancement effect; When sucker rod progressively rises, its required tractive force (polished rod load) progressively reduces, the tractive force that balancing weight produced is during greater than the required tractive force of oil pumping rod end, traction machine begins to flog a dead horse, that is to say, traction machine plays the effect of a resistance and brake, so that keep balance between tractive force that balancing weight produced and the required tractive force of oil pumping rod end, thus reduced the operating efficiency of traction machine.Further, the pull rope that connects balancing weight and sucker rod is that winding is on traction sheave, therefore, when the required tractive force (polished rod load) of the tractive force that balancing weight produced and the rod end of pumping is uneven, occur skidding between pull rope and the traction sheave easily, and traction machine is connected with traction sheave by belt transmission, therefore after the long-term use of belt skidding appears easily also, thus the influence safety in production.

A kind of disclosed on Chinese patent literature " super low energy consumption tower crane type oil pumping machine ", its notification number is CN2908774Y, be fixed with the big truckle that reducing connects as one in the support upper end corresponding with well head, large pulley lower carriage upper end is fixed with the fixed pulley group, be wound with the trip rope on the large pulley, the You Shengyi end is respectively by being fixed on behind fixed pulley group and the running block on the fixed pulley group, running block links to each other with sucker rod, the other end of trip rope is connected with balancing weight, the left side of big truckle is fixed with motor, and the belt pulley on the motor links to each other with truckle by belt.This tower crane type oil pumping machine reduces the tractive force of trip rope by one group of pulley mechanism, thereby reduce the starting power of motor, but there is following point in it: 1. assembly pulley has played the decelerating effect of reduction box, but the tractive force that its balancing weight produced also is constant, therefore still can't solve in the sucker rod problem that motor flogs a dead horse in upstroke, thereby reduced efficiency of motor, increased energy consumption.2. sucker rod is suspended on the running block, therefore occurs easily rocking, and then influences the stable of sucker rod stroke, the safety when being unfavorable for oil pumper work.3. trip rope and belt skid easily, and then reduce its safety and transmission efficiency.4. assembly pulley is multiplied the stroke of balancing weight, thereby makes pylon stroke too high or sucker rod low excessively.

The utility model content

The utility model is the problem of complex structure, working service cost height and the poor stability of, complete machine low for the existing electric efficiency of the tower shelf type oil pumping machine that solves prior art, and a kind of electric efficiency height, simple in structure, safety good and cost is low tower shelf type oil pumping machine are provided.

To achieve these goals, the utility model is by the following technical solutions: a kind of novel tower shelf type oil pumping machine, comprise pylon, be fixed on the traction machine on the pylon, traction machine links by transmission mechanism and sucker rod, balancing weight, described transmission mechanism comprises the traction sheave that links to each other with traction machine, the combination guide wheel of being located at traction sheave one side, and described combination guide wheel is made up of coaxial big guide wheel, little guide wheel; Be provided with first pull rope between traction sheave and big guide wheel, the first pull rope two ends are fixing respectively also to be wound on traction sheave and the big guide wheel stackedly; Be provided with second pull rope between little guide wheel and sucker rod, second pull rope, one end is fixing also to be wound on the little guide wheel stackedly, and the other end is connected with sucker rod; Also be provided with the 3rd pull rope that is connected with balancing weight on traction sheave, the 3rd pull rope one end is fixing also to be wound on the traction sheave stackedly, and the other end is connected with balancing weight.The transmission mechanism of existing tower shelf type oil pumping machine has a variety of, its basic thinking all is by the lifting force of work-saving devices such as reduction box, assembly pulley increase to sucker rod, with the output torque of reduction traction machine (motor), and then the power of reduction traction machine is to reach purpose of energy saving.Yet, laborsavingly do not economize the merit principle as can be known by physical, its energy-conserving action is also not obvious, real effect is to reduce the power and the cost of traction machine, and therefore above-mentioned transmission mechanism can't solve the problem that traction machine flogs a dead horse all the time because the tractive force that balancing weight produced is constant in the upstroke of sucker rod.Adopted the combination guide wheel of one group of elevator mode in the transmission mechanism of the present utility model, its pull rope is to be wound on traction sheave, big guide wheel and the little guide wheel stackedly, and the winding radius of pull rope is constantly to change when rotating, therefore by balancing weight produced to the tractive force of oil pumping rod end also in continuous change.The rotation of traction machine is at first slowed down by big guide wheel, with the power of reduction traction machine, and its convenient manufacturing simple in structure, need not during running to lubricate, and noise is low; Simultaneously, when traction machine rotates the rising of drive sucker rod, the winding radius of second pull rope on little guide wheel progressively increases, and the winding radius of first pull rope on big guide wheel progressively reduces, the winding radius of first pull rope on traction sheave then progressively increases, and on the contrary, the winding radius of the 3rd pull rope on traction sheave progressively reduces, therefore, balancing weight progressively reduces by the tractive force that traction sheave, combination are delivered to the oil pumping rod end behind the guide wheel.Like this, sucker rod is in upstroke, though its required tractive force progressively reduces, but, because the tractive force to the oil pumping rod end that balancing weight produced also correspondingly reduces, thereby the tractive force that can effectively avoid producing because of balancing weight causes traction machine to flog a dead horse greater than the required tractive force of oil pumping rod end, by adjusting big guide wheel respectively, the diameter of little guide wheel and traction sheave, can realize easily that sucker rod is when arriving the upper limit position of upstroke, the required tractive force of oil pumping rod end equates substantially with the tractive force that balancing weight produces, thereby thoroughly solve the problem that traction machine flogs a dead horse, improve the operating efficiency of traction machine effectively, and the starting load during the traction machine backward rotation can be zero substantially, thereby helps the reverse startup of traction machine.Further, pull rope in the utility model all is to adopt the mode of elevator to be wound on large and small guide wheel and the traction sheave stackedly, its end is separately fixed on large and small guide wheel and the traction sheave, thereby can thoroughly avoid the skidding between pull rope and large and small guide wheel and the traction sheave, safety when having guaranteed the oil pumper running, help improving power transmission efficiency, and need not manually to adjust the pull rope pretightning force, thereby help simplifying erection procedure.

As preferably, on pylon, be provided with assembly pulley near balancing weight one side, described assembly pulley comprises fixed pulley group and the corresponding running block that is fixed on the pylon, at fixed pulley group side corresponding directive wheel is set, described the 3rd pull rope one end is fixing and be wound on the traction sheave stackedly, the other end is fixed on the pylon after walking around fixed pulley on directive wheel, fixed pulley group and the running block and movable pulley successively, and balancing weight is connected with running block.For some heavy duty services, the lifting travel that assembly pulley can reduce balancing weight significantly is set, thereby reduces the height of pylon, improve the security performance of oil pumper.The setting of directive wheel then helps the adjustment of relative position between balancing weight and the traction sheave and arranges.

As preferably, described fixed pulley group comprises a fixed pulley, and correspondingly, described running block is made up of two movable pulley.The lifting travel of balancing weight can shorten 3/4ths like this, and the unlikely again weight of balancing weight that makes is excessive simultaneously.

As preferably, described first, second, third pull rope adopts flat composite steel band.The tensile strength height of composite steel band, long service life need not to lubricate, and flat steel band helps it and reels stackedly.

As preferably, be respectively equipped with on described traction sheave, big guide wheel and the little guide wheel and be used to the U-shaped guide groove of pull rope of reeling, and be provided with the chamfering of guiding at the edge of opening of U-shaped guide groove.The U-shaped guide groove has guiding and positioning action when the stacked coiling of pull rope, can avoid the slump of pull rope when reeling, thereby guarantee that its winding radius is linear change.And the chamfering that is arranged on the edge of opening of U-shaped guide groove has guide effect when pull rope is reeled, pull rope is successfully reeled.

As preferably, on pylon, be provided with directive wheel near the outside of making up guide wheel, second pull rope on the little guide wheel is walked around directive wheel and is connected with sucker rod, and directive wheel is connected by bearing support and pylon are removable.By the adjustment of directive wheel position, be convenient to adjust the axiality of pull rope and sucker rod.

As preferably, described traction sheave is provided with electromagnetic brake and bolt-type self-locking mechanism.Out of service or when needing repairing when oil rig, except braking the traction sheave by electromagnetic brake, also available bolt-type self-locking mechanism is the traction sheave locking, thereby can guarantee the reliability of locking, avoids relying on merely the electromagnetic brake of traction machine to carry out the potential safety hazard that locking may occur.

As preferably, be provided with vertically-guided mechanism between described balancing weight and the pylon.Thereby can avoid the collision of balancing weight and pylon, guarantee the steady lifting of balancing weight.

Therefore, the utlity model has following beneficial effect: (1) under the prerequisite that does not increase traction machine power, has avoided traction machine to flog a dead horse when upward stroke by the variable combination guide wheel of winding radius, improve the efficient of traction machine effectively, really realized the energy-conservation of oil rig; (2) transmission mechanism of elevator mode has been avoided skidding of pull rope, has improved safety and power transmission efficiency; (3) the balancing weight stroke is short, helps reducing the pylon height, and the raising safety also reduces cost; (4) simple in structure, low cost of manufacture, operation and maintenance is convenient; (5) need not manually to adjust the pull rope pretightning force.

Description of drawings

Fig. 1 is a structural representation of the present utility model;

Fig. 2 is the vertical view of Fig. 1;

Fig. 3 is the partial sectional view of traction sheave among Fig. 2.

The specific embodiment

Below in conjunction with accompanying drawing the utility model is further described.

In embodiment as shown in Figure 1 and Figure 2, a kind of energy-saving tower-type oil rig of the present utility model, comprise pylon 1, traction machine 2, transmission mechanism, sucker rod 3, balancing weight 4 and control cabinet 5, traction machine flatly is arranged on the centre position of pylon upper brace, transmission mechanism comprises and the coaxial traction sheave that is connected 6 of traction machine, the combination guide wheel 7 that be arranged in parallel and fixedly connected on the right side of traction sheave with pylon, the combination guide wheel comprises big guide wheel 71, the little guide wheel 72 that is fixed on the same turning cylinder; An assembly pulley 8 is set in the left side of traction sheave, and this assembly pulley comprises fixed pulley group of being made up of a fixed pulley that is fixed on the pylon 81 and the running block of being made up of the movable pulley of two correspondences 82.As shown in Figure 3, on the face of cylinder of columniform traction sheave, be arranged side by side the U-shaped guide groove 10 of two pull ropes that are used to reel, one of them U-shaped guide groove is used to reel and connects first pull rope 21 of big guide wheel, and another U-shaped guide groove is used to reel and connects the 3rd pull rope 23 of assembly pulley.Correspondingly, on big guide wheel, little guide wheel the U-shaped guide groove is set respectively also, the concrete shape of U-shaped guide groove can be referring to accompanying drawing 4.Be provided with first pull rope 21 with transferring power between traction sheave and big guide wheel, an end of first pull rope is fixing also to be wound in the U-shaped guide groove of big guide wheel stackedly, and the other end is then fixing also to be wound in the U-shaped guide groove corresponding on the traction sheave stackedly; Between little guide wheel and sucker rod, be provided with second pull rope 22 of traction usefulness, simultaneously, layout for ease of the combination guide wheel, right side near the combination guide wheel on pylon is provided with a directive wheel 9, be slidingly connected by guide rail between the bearing support of the directive wheel on this right side and the pylon, simultaneously at the be rotatably connected adjusting rod 91 of a level of a side of bearing support, the other end of adjusting rod is provided with screw thread, and the adjusting nut 92 that is connected with adjusting rod is set on pylon, because adjusting nut is fixed, and therefore, passes through rotary regulating lever, can realize moving horizontally of adjusting rod, thereby drive moving horizontally of directive wheel.Second pull rope, one end is fixing and is wound in the U-shaped guide groove of little guide wheel stackedly, and the other end is connected with sucker rod after walking around directive wheel, can adjust axiality between second pull rope and the sucker rod by the position of adjustment directive wheel; Between traction sheave and assembly pulley, be provided with the 3rd pull rope with transmitting tractive power, be arranged side by side a directive wheel of fixedlying connected 9 simultaneously with pylon on the next door of left side fixed pulley, the directive wheel in this left side is used for the guiding of the 3rd pull rope, thereby make things convenient for the layout of balancing weight position, one end of pull rope is fixing also to be wound in the U-shaped guide groove corresponding on the traction sheave stackedly, the other end is fixed on the pylon after then walking around fixed pulley in directive wheel, the assembly pulley and movable pulley successively, and the connection support of running block is connected with balancing weight.Above-mentioned first, second, third pull rope can adopt flat elevator composite steel band, and composite steel band is the intensity height not only, and helps the stacked coiling in the U-shaped guide groove.On the traction sheave right side, sucker rod produces a clockwise moment of torsion by second pull rope and combination guide wheel to traction sheave; In the traction sheave left side, balancing weight produces an anticlockwise moment of torsion by assembly pulley to traction sheave.Certainly, above-mentioned big guide wheel 71 also can be made up of two big guide wheel sheets, two big guide wheel sheets are located at the both sides of little guide wheel symmetrically, correspondingly, three U-shaped guide grooves are set on the traction sheave, Zhong Jian U-shaped guide groove the 3rd pull rope that is used to reel wherein, and the U-shaped guide groove of both sides is used to reel and connects first pull rope of big guide wheel, thus make traction sheave rotating shaft and the stressed intensity that evenly helps improving transmission mechanism of combination guide wheel rotating shaft.In addition, swing during for fear of the balancing weight lifting, vertically-guided mechanism (not shown) can be set between pylon and balancing weight, specifically can on pylon, vertical guide peg be set the both sides near balancing weight respectively, correspondingly, roller is set on balancing weight, and on the lateral surface of roller, the deep-slotted chip breaker that cooperates with guide peg is set, roller and guide peg form and are slidingly connected, thereby make the balancing weight can be along the steady lifting of guide peg.Certainly, also can between pylon and balancing weight, guide rail be set, to realize stable lifting.In addition, in the upper and lower limit position of balancing weight stroke limit switch 13 is set respectively, it realizes the rotating control of traction machine by control cabinet 5.

Oil pumper of the present utility model operating principle in the running is as follows:

As shown in Figure 1, when sucker rod the oil pumping upstroke the time, traction machine and balancing weight provide tractive force that sucker rod is risen simultaneously, traction machine produces draw by the directive wheel on combination guide wheel, right side to sucker rod, and the balancing weight then directive wheel traction sucker rod on the directive wheel by the left side, assembly pulley, traction sheave, combination guide wheel, right side rises.Sucker rod is in upward stroke, because the weight of the oil of its extraction is progressively alleviating, therefore its required tractive force progressively reduces, sucker rod required maximum drawbar pull when the upstroke ground zero is Fmax, sucker rod required minimum tractive force when arriving the lower position of down stroke is Fmin, when we can be set in the upstroke ground zero, still be (Fmax+Fmin)/2 by the initial traction force that balancing weight produced to the oil pumping rod end, the average of just maximum, minimum tractive force, thus the power output of guaranteeing traction machine can be not excessive.Traction machine drives the traction crop rotation and rotates counterclockwise, traction sheave drives big guide wheel by first pull rope and rotates counterclockwise, the little guide wheel that is fixed in the same rotating shaft with big guide wheel rotates counterclockwise synchronously, and by being wound on second pull rope traction sucker rod rising oil pumping on the little guide wheel, owing to connect second pull rope of sucker rod and little guide wheel and be winding on the right side slidably on the directive wheel, therefore can make steel band and sucker rod coaxial by the horizontal level of adjusting this directive wheel, guarantee sucker rod lifting smoothly.Meanwhile, the 3rd pull rope that is connected with assembly pulley on the traction sheave progressively discharges, balancing weight is delivered to tractive force on the 3rd pull rope by assembly pulley, and by directive wheel, the traction sheave in left side tractive torque is delivered on the combination guide wheel with the rising of traction sucker rod.Because moment of torsion equals the active force of pull rope and the product of pull rope winding radius, therefore, when winding radius increased, identical tractive force that moment of torsion produces diminished, and on the contrary, when winding radius reduced, it is big that identical tractive force that moment of torsion produces becomes.In the uphill process of sucker rod, the winding radius of the 3rd pull rope on traction sheave progressively reduces, and balancing weight is constant substantially by the tractive force that assembly pulley is delivered on the 3rd pull rope, it is substantially equal to 1/4th of balancing weight weight, and therefore the 3rd pull rope progressively reduces the tractive torque of traction sheave; Further, the winding radius of first pull rope on traction sheave progressively increases, and the winding radius of first pull rope on big guide wheel progressively reduces, therefore, the moment of torsion that the moment of torsion that above-mentioned balancing weight produced is delivered on the little guide wheel after by traction sheave and big guide wheel reduces again, and the winding radius of second pull rope progressively increases on the little guide wheel, so the tractive force that above-mentioned moment of torsion produces on second pull rope further diminishes, that is to say, the tractive force that the tractive force of balancing weight finally is delivered to the oil pumping rod end after by above-mentioned transmission mechanism progressively reduces, thereby progressively reduce corresponding with the required tractive force of sucker rod, avoided the balancing weight defective invariable in the existing tower shelf type oil pumping machine to the tractive force of sucker rod, big by reasonably selecting, parameters such as the diameter of little guide wheel and thickness of strips, can realize easily that sucker rod is when arriving the upper limit position of upstroke, the required tractive force of the tractive force that balancing weight produced and sucker rod equates substantially, like this, can guarantee that not only traction machine does not flog a dead horse in whole upstroke, can make simultaneously the starting load of traction machine in reverse down stroke is zero substantially, thereby help improving the startability of traction machine, reduce the impact of excessive starting current, prolong the application life of traction machine.Because little guide wheel is identical with the rotation number of turns of big guide wheel, therefore, the displacement of first pull rope is the lifting travel of sucker rod greater than the distance of second pull rope, and the displacement of the 3rd pull rope equates substantially with the displacement of first pull rope, therefore, if balancing weight directly is connected with the 3rd pull rope, its lifting travel will be significantly greater than the lifting travel of sucker rod, thereby need increase the height of pylon, and then increase manufacturing cost, and the safety that is unfavorable for pylon, the 3rd pull rope of the present invention is connected with balancing weight by an assembly pulley, thereby can make the lifting travel of balancing weight shorten 3/4ths, has reduced the height of pylon effectively, especially for the oil pumping of some deep-wells, the effect of said structure is more obvious.

When sucker rod arrived the upper limit position of upstroke, correspondingly, balancing weight arrived the lower position of its stroke, and contacts with the travel switch of its lower position, controller control traction machine backward rotation, and sucker rod enters descending stroke.At this moment, balancing weight becomes load, makes its rising accumulation of energy and the tractive force that sucker rod and traction machine produced draws balancing weight jointly.Because this moment, the weight of sucker rod remained unchanged substantially, and it is just opposite during the upstroke of the variation of the winding radius of steel band and front sucker rod on large and small guide wheel and the traction sheave, therefore, balancing weight progressively increases by the moment of torsion that assembly pulley is delivered on the traction sheave, sucker rod then progressively reduces by the moment of torsion that the first combination guide wheel is delivered on the traction sheave, the moment of torsion that moment of torsion that traction machine produced and sucker rod produce is used to promote balancing weight jointly, therefore traction machine is to the balancing weight work done, so that make balancing weight rising accumulation of energy.When sucker rod arrived the lower position of its down stroke, balancing weight just in time contacted with the travel switch of its stroke upper limit, and the counter-rotating of controller control traction machine begins second oil pumping circulation, and so constantly circulation repeats to realize continuous oil pumping.

When oil rig of the present utility model need be safeguarded or shut down the long period; except the electromagnetic brake of traction machine itself carries out the locking traction sheave; we can set up a bolt-type self-locking mechanism (not shown) on traction sheave; specifically can along circumference some pin holes be set evenly at the end face of traction sheave; the position of corresponding certain pin hole is provided with latch on the bearing support of traction sheave simultaneously; when the needs self-locking; thereby in the pin hole that can the latch insertion is relative with it that traction sheave is locked, to guarantee the safety of device.

The above only is a kind of typical structure of the present utility model, can make a lot of changes according to basic principle of the present utility model as those skilled in the art, for example: change balancing weight wherein into sucker rod, can realize the both sides oil pumping; Traction machine and traction sheave also can be arranged on the bottom of pylon; And the assembly pulley that is used to slow down can be designed to 2 multiplying powers or 6 multiplying powers even many multiplying powers as required.In addition, use for the area that seasons oneself to cold, we can install protective cover additional on transmission mechanism, and the heat that produces when utilizing traction machine, transmission mechanism work makes composite steel band can be operated in a suitable temperature, avoid the composite material sclerosis on composite steel band top layer, to prolong its application life; Further; we can change traction sheave into steel band (or belt) ring seal shape with the big introduction connected mode of combination and be connected; when just allowing holddown the combination guide wheel on second pull rope skid play the protection oil well pump effect; but balancing weight one side is non-slip to guarantee job safety; the 3rd pull rope can be used as the pretightning force of the big introduction overhanging cable of combination to the tractive force of traction sheave simultaneously; prevent the idle stroke and the impact phenomenon of the break-in moment generation that motor positive and inverse is moving, save artificial pretension.

Claims

1. novel tower shelf type oil pumping machine, comprise pylon (1), be fixed on the traction machine (2) on the pylon, traction machine links by transmission mechanism and sucker rod (3), balancing weight (4), it is characterized in that, described transmission mechanism comprises the traction sheave (6) that links to each other with traction machine, the combination guide wheel (7) of being located at traction sheave one side, and described combination guide wheel is made up of coaxial big guide wheel (71), little guide wheel (72); Be provided with first pull rope (21) between traction sheave and big guide wheel, the first pull rope two ends are fixing respectively also to be wound on traction sheave and the big guide wheel stackedly; Be provided with second pull rope (22) between little guide wheel and sucker rod, second pull rope, one end is fixing also to be wound on the little guide wheel stackedly, and the other end is connected with sucker rod; Also be provided with the 3rd pull rope (23) that is connected with balancing weight on traction sheave, the 3rd pull rope one end is fixing also to be wound on the traction sheave stackedly, and the other end is connected with balancing weight.

2. a kind of novel tower shelf type oil pumping machine according to claim 1, it is characterized in that, on pylon, be provided with assembly pulley (8) near balancing weight one side, described assembly pulley comprises fixed pulley group (81) and the corresponding running block (82) that is fixed on the pylon, at fixed pulley group side corresponding directive wheel (9) is set, described the 3rd pull rope one end is fixing and be wound on the traction sheave stackedly, the other end is fixed on the pylon after walking around fixed pulley on directive wheel, fixed pulley group and the running block and movable pulley successively, and balancing weight is connected with running block.

3. a kind of novel tower shelf type oil pumping machine according to claim 2 is characterized in that described fixed pulley group comprises a fixed pulley, and correspondingly, described running block is made up of two movable pulley, slows down thereby form 4 multiplying powers.

4. a kind of novel tower shelf type oil pumping machine according to claim 1 is characterized in that, described first, second, third pull rope adopts flat composite steel band.

5. a kind of novel tower shelf type oil pumping machine according to claim 1 is characterized in that, is respectively equipped with on described traction sheave, big guide wheel and the little guide wheel to be used to the U-shaped guide groove (10) of pull rope of reeling, and is provided with the chamfering of guiding at the edge of opening of U-shaped guide groove.

6. according to claim 1 or 2 or 3 or 4 or 5 described a kind of novel tower shelf type oil pumping machines, it is characterized in that, the outside near the combination guide wheel on pylon is provided with directive wheel, and second pull rope on the little guide wheel is walked around directive wheel and is connected with sucker rod, and the bearing support of directive wheel is connected with pylon is removable.

7. according to claim 1 or 2 or 3 or 4 or 5 described a kind of novel tower shelf type oil pumping machines, it is characterized in that, on traction sheave, be provided with electromagnetic brake and bolt-type self-locking mechanism.

8. a kind of novel tower shelf type oil pumping machine according to claim 6 is characterized in that, is provided with electromagnetic brake and bolt-type self-locking mechanism on traction sheave.

9. according to claim 1 or 2 or 3 or 4 or 5 described a kind of novel tower shelf type oil pumping machines, it is characterized in that, between balancing weight and pylon, be provided with vertically-guided mechanism.

10. a kind of novel tower shelf type oil pumping machine according to claim 8 is characterized in that, is provided with vertically-guided mechanism between balancing weight and pylon.