CN205297490U - Rack and pinion formula beam -pumping unit - Google Patents

Abstract

The utility model discloses a rack and pinion pumping unit, which comprises a pumping mechanism and a power mechanism. The pumping mechanism includes a cylindrical fuselage, an upper sucker rod, a lower sucker rod and a linkage column. The packing box is installed, the oil pipe is installed at the lower end of the cylindrical fuselage, the lower end of the upper sucker rod is connected with the upper end of the linkage column, the upper end of the upper sucker rod extends out of the packing box and is slidingly matched with the packing box, the lower sucker rod The upper end of the lower sucker rod is connected to the lower end of the linkage column, and the lower end of the lower sucker rod extends into the oil pipe. The power mechanism includes a three-phase motor, a reducer and a motor control system. The output shaft of the three-phase motor is connected with the input shaft of the reducer, and the reducer The output shaft of the reducer extends into the cylindrical body, and the part where the output shaft of the reducer extends into the cylindrical body is equipped with a gear. The linkage column is provided with a rack that meshes with the gear. Direction layout. The rack and pinion pumping unit adopts a rack and pinion structure, its structure is relatively tight and stable, and it works very stably.

Description

A rack and pinion oil pumping unit

technical field

The utility model belongs to the technical field of oil pumping units, in particular to a rack and pinion type oil pumping unit.

Background technique

There are many kinds of beamless pumping units at present, and the typical ones are rack pumping units, chain pumping units, and long ring pumping units. In the long ring rack pumping unit, the pinion on the input shaft needs to move laterally when reversing, which reduces the stability of the system. Some rack pumping units use switched reluctance three-phase motors or linear three-phase motors, which increase the cost, short life and poor stability.

Utility model content

The purpose of the utility model is to overcome the deficiencies in the above-mentioned prior art and provide a rack and pinion pumping unit. The rack and pinion pumping unit adopts a rack and pinion structure, its structure is relatively tight and stable, and it works very stably.

In order to achieve the above purpose, the technical solution adopted by the utility model is: a rack and pinion oil pumping unit, which is characterized in that it includes an oil pumping mechanism and a power mechanism, and the oil pumping mechanism includes a cylindrical fuselage and is arranged on the The upper sucker rod, the lower sucker rod and the linkage column in the tubular fuselage, the packing box is installed on the upper end of the tubular fuselage, the oil pipe is installed on the lower end of the tubular fuselage, and the upper sucker rod The lower end of the oil rod is connected with the upper end of the linkage column, the upper end of the upper sucker rod extends out of the packing box and is in sliding fit with the packing box, the upper end of the lower sucker rod is connected with the upper end of the linkage column The lower ends of the lower sucker rod are connected to each other, and the lower end of the lower sucker rod extends into the oil pipe. The power mechanism includes a three-phase motor, a reducer, and a motor control system for controlling the forward and reverse rotation of the three-phase motor. The three-phase The output shaft of the motor is connected with the input shaft of the reducer, the output shaft of the reducer extends into the cylindrical body, and the part where the output shaft of the reducer extends into the cylindrical body is equipped with a gear , the linkage column is provided with a rack meshed with the gear, and the rack is arranged along the length direction of the cylindrical fuselage.

The rack and pinion pumping unit above is characterized in that: the motor control system includes a start switch S1, a stop switch S2, a contactor KM1, a contactor KM2, an upper limit switch and a lower limit switch, and the contactor One end of the coil of KM1, the normally closed contact of the upper limit switch, the start switch S1 and the stop switch S2 connected in series is connected to the B-phase output end of the three-phase AC power supply, the coil of the contactor KM1, the normally closed contact of the upper limit switch The other end of the contact, the start switch S1 and the stop switch S2 connected in series is connected to the C-phase output end of the three-phase AC power supply, the main contact of the contactor KM1 and the normally open contact of the lower limit switch are connected to the start The switch S1 is connected in parallel; the coil of the contactor KM2, the normally closed contact of the lower limit switch and the normally open contact of the upper limit switch are connected in series to the connecting ends of the start switch S1 and the stop switch S2, and the contactor The coil of KM2, the normally closed contact of the lower limit switch and the normally open contact of the upper limit switch are connected in series and the other end is connected to the C-phase output end of the three-phase AC power supply. The main contact of the contactor KM2 is connected to the upper limit switch. The normally open contacts of the switch are connected in parallel; the A-phase coil, B-phase coil and C-phase coil of the three-phase motor are respectively connected to the A-phase output terminal, B-phase output terminal and the three-phase AC power supply through the three auxiliary contacts of the contactor KM1 The C-phase output terminals are connected in one-to-one correspondence. The B-phase coil, A-phase coil and C-phase coil of the three-phase motor are respectively connected to the A-phase output terminal and B-phase output terminal of the three-phase AC power supply through the three auxiliary contacts of the contactor KM2. The upper limit switch is set at the upper end of the linkage column, the lower limit switch is set at the lower end of the linkage column, and the upper part of the cylindrical body is provided with a device for interfacing with the upper limit switch. Cooperating with the upper limit block, the lower part of the cylindrical body is provided with a lower limit block for matching with the lower limit switch.

The above-mentioned rack and pinion pumping unit is characterized in that: the coil of the contactor KM1, the normally closed contact of the upper limit switch, the start switch S1 and the stop switch S2 are connected in series at one end through the fuse FU and the three Connect to the B-phase output terminal of the AC power supply.

The above-mentioned rack and pinion pumping unit is characterized in that: the upper part of the cylindrical fuselage is provided with a plurality of upper limit holes for installing upper limit blocks, and the plurality of upper limit holes are arranged along the tube The longitudinal direction of the cylindrical fuselage is arranged at intervals, and the lower part of the cylindrical fuselage is provided with a plurality of lower limit holes for installing lower limit blocks, and the plurality of lower limit holes are spaced apart along the length direction of the cylindrical fuselage. layout.

The above-mentioned rack and pinion pumping unit is characterized in that: a rotating wheel is installed on the output shaft of the reducer, a steel wire rope is wound on the rotating wheel, and one end of the steel wire rope is fixed on the rotating wheel , the other end of the steel wire rope is vertically downward and is connected with a balance weight.

The above-mentioned rack and pinion pumping unit is characterized in that: a driving wheel is installed on the output shaft of the three-phase motor, a driven wheel is installed on the input shaft of the reducer, and the driving wheel and the driven wheel connected by a drive belt.

Compared with the prior art, the utility model has the following advantages:

1. The structure of the utility model is simple, and the design is novel and reasonable.

2. The motor control system of the utility model has a simple structure, can effectively realize the positive and negative rotation of the three-phase motor, the system is stable, and the stroke of the sucker rod can be adjusted conveniently.

3. The utility model can change the installation position of the upper limit block by setting multiple upper limit holes, thereby adjusting the top dead point position of the upper sucker rod; by setting multiple lower limit holes, the installation position of the lower limit block can be changed , so as to adjust the bottom dead center position of the lower sucker rod.

4. The utility model can play a role of dynamic balance when the upper sucker rod and the lower sucker rod reciprocate up and down by setting the balance block.

5. The utility model has the advantages of low cost, good application effect and convenient popularization and use.

The technical solutions of the present utility model will be further described in detail through the drawings and embodiments below.

Description of drawings

Figure 1 is a schematic diagram of the overall structure of the utility model.

Figure 2 is an enlarged view of A in Figure 1 .

Fig. 3 is an enlarged view of B in Fig. 1 .

Fig. 4 is a schematic diagram of the connection relationship between the upper sucker rod, the lower sucker rod and the linkage column of the present invention.

Fig. 5 is a circuit diagram of the motor control system of the present invention.

Explanation of reference signs:

1—tubular fuselage; 2—packing box; 3—upper sucker rod;

4—rotating wheel; 5—reducer; 6—drive belt;

7—three-phase motor; 8—driven wheel; 9—wire rope;

10—balance block; 11—oil pipe; 12—linkage column;

13—gear; 14—rack; 15—upper limit block;

16—lower limit block; 17—upper limit hole; 18—lower limit hole;

19—upper limit switch; 20—lower limit switch; 21—lower sucker rod.

detailed description

A rack-and-pinion oil pumping unit as shown in Figures 1 to 4 includes an oil pumping mechanism and a power mechanism, and the oil pumping mechanism includes a cylindrical body 1 and a device arranged in the cylindrical body 1 The upper sucker rod 3, the lower sucker rod 21 and the linkage column 12, the packing box 2 is installed on the upper end of the cylindrical fuselage 1, the oil pipe 11 is installed on the lower end of the cylindrical fuselage 1, and the upper pumping The lower end of the oil rod 3 is connected with the upper end of the linkage column 12, the upper end of the upper sucker rod 3 extends out of the packing box 2 and is in sliding fit with the packing box 2, the upper end of the lower sucker rod 21 Connected with the lower end of the linkage column 12, the lower end of the lower sucker rod 21 extends into the oil pipe 11, the power mechanism includes a three-phase motor 7 and a reducer 5 and is used to control the three-phase motor 7 Forward and reverse motor control system, the output shaft of the three-phase motor 7 is connected with the input shaft of the reducer 5, the output shaft of the reducer 5 extends into the cylindrical body 1, and the reducer A gear 13 is installed at the position where the output shaft of the machine 5 extends into the cylindrical body 1, and a rack 14 meshing with the gear 13 is arranged on the linkage column 12, and the rack 14 is arranged along the cylindrical shape. The length direction of the fuselage 1 is arranged.

In this embodiment, when the rack and pinion pumping unit is working, the three-phase motor 7 is a three-phase asynchronous three-phase motor. Through the motor control system, the three-phase motor 7 can not only provide power but also realize forward rotation and Reverse rotation, the power output by the three-phase motor 7 is decelerated by the reducer 5 in two stages, and then drives the gear 13 at the shaft end of the low-speed stage to mesh with the rack 14, so as to drive the linkage column 12 to reciprocate up and down, and then drive the upper sucker rod 3 It reciprocates up and down together with the lower sucker rod 21 and the linkage column 12, and cooperates with the oil pump in the oil pipe 11 through the lower sucker rod 21 to realize the oil pumping action. The rack and pinion pumping unit adopts a rack and pinion structure, its structure is relatively tight and stable, and it works very stably.

As shown in Figure 5, the motor control system includes a start switch S1, a stop switch S2, a contactor KM1, a contactor KM2, an upper limit switch 19 and a lower limit switch 20, the coil of the contactor KM1, the upper limit switch 19 One end of the normally closed contact, the start switch S1 and the stop switch S2 connected in series with the B-phase output end of the three-phase AC power supply, the coil of the contactor KM1, the normally closed contact of the upper limit switch 19, the start switch S1 The other end connected in series with the stop switch S2 is connected to the C-phase output end of the three-phase AC power supply, and the main contact of the contactor KM1 and the normally open contact of the lower limit switch 20 are connected in parallel with the start switch S1; The coil of the contactor KM2, the normally closed contact of the lower limit switch 20 and the normally open contact of the upper limit switch 19 are connected in series with the connecting ends of the start switch S1 and the stop switch S2, and the coil of the contactor KM2 1. The other end of the normally closed contact of the lower limit switch 20 and the normally open contact of the upper limit switch 19 are connected in series with the C-phase output end of the three-phase AC power supply, and the main contact of the contactor KM2 is connected with the upper limit switch The normally open contacts of 19 are connected in parallel; the A-phase coil, B-phase coil and C-phase coil of the three-phase motor 7 are respectively connected to the A-phase output terminal and B-phase output terminal of the three-phase AC power supply through the three auxiliary contacts of the contactor KM1 One-to-one corresponding connection with the C-phase output terminal, the B-phase coil, A-phase coil and C-phase coil of the three-phase motor 7 are respectively connected to the A-phase output terminal and B-phase coil of the three-phase AC power supply through the three auxiliary contacts of the contactor KM2. The output end and the C-phase output end are connected in one-to-one correspondence; the upper limit switch 19 is set on the upper end of the linkage column 12, the lower limit switch 20 is set on the lower end of the linkage column 12, and the upper part of the cylindrical body 1 is set There is an upper limit block 15 for cooperating with the upper limit switch 19 , and a lower limit block 16 for cooperating with the lower limit switch 20 is provided on the lower part of the cylindrical body 1 . In this embodiment, the limit switch S1 in FIG. 5 is the upper limit switch 19 , and the limit switch S2 is the lower limit switch 20 .

In this embodiment, when the motor control system is working, press the start switch S1, the coil of the contactor KM1 is closed, the main contact of the contactor KM1 is closed, and at the same time, the auxiliary contact of the contactor KM1 is closed, and the three-phase motor 7. Forward rotation, the start switch S1 is turned off. At this time, under the drive of the three-phase motor 7 and the transmission cooperation of the rack and pinion, the upper sucker rod 3, the linkage column 12 and the lower sucker rod 21 move upward. When the upper sucker rod 3 reaches the top dead point, the upper limit switch K1 cooperates with the upper limit block 15 to disconnect the normally closed point of the upper limit switch K1, and at the same time close the normally open point of the upper limit switch K1, and the coil of the contactor KM2 sucks close, the main contact of contactor KM2 is closed, and the auxiliary contact of contactor KM2 is closed at the same time, the three-phase motor 7 reverses, the upper sucker rod 3, the linkage column 12 and the lower sucker rod 21 move downward, and the pumping down When the oil rod 21 reaches the bottom dead point, the lower limit switch K2 cooperates with the lower limit block 16 to disconnect the normally closed point of the lower limit switch K2, and at the same time the normally open point of the lower limit switch K2 is closed, and the coil of the contactor KM1 is closed. The main contact of the contactor KM1 is closed, and at the same time, the auxiliary contact of the contactor KM1 is closed, and the three-phase motor 7 rotates forward, and so on, so as to realize the oil pumping action. When the oil extraction is completed or breaks down, press the stop switch S2, the three-phase motor 7 stops rotating, and stops pumping. The motor control system has a simple structure, can effectively realize forward and reverse rotation of the three-phase motor 7 , has a stable system, and can conveniently adjust the stroke of the sucker rod.

As shown in Figure 5, one end of the coil of the contactor KM1, the normally closed contact of the upper limit switch 19, the start switch S1 and the stop switch S2 connected in series is connected to the B-phase output end of the three-phase AC power supply through the fuse FU .

As shown in Figure 2, the upper part of the cylindrical body 1 is provided with a plurality of upper limit holes 17 for installing upper limit blocks 15, and the plurality of upper limit holes 17 are along the length of the cylindrical body 1. The direction is laid out at intervals.

In this embodiment, by providing a plurality of upper limit holes 17 , the installation position of the upper limit block 15 can be changed, thereby adjusting the position of the upper dead center of the upper sucker rod 3 .

As shown in Figure 3, the lower part of the cylindrical body 1 is provided with a plurality of lower limit holes 18 for installing the lower limit block 16, and the plurality of lower limit holes 18 are along the length of the cylindrical body 1. The direction is laid out at intervals.

In this embodiment, by providing a plurality of lower limit holes 18 , the installation position of the lower limit block 16 can be changed, thereby adjusting the bottom dead center position of the lower sucker rod 21 .

As shown in Figure 1, a running wheel 4 is installed on the output shaft of the reducer 5, and a steel wire rope 9 is wound on the running wheel 4, and one end of the steel wire rope 9 is fixed on the running wheel 4, and the steel wire rope The other end of 9 is vertically downward and is connected with balance weight 10.

In this embodiment, by setting the balance weight 10, it can play a role of dynamic balance when the upper sucker rod 3 and the lower sucker rod 21 reciprocate up and down.

As shown in Figure 1, a driving wheel is installed on the output shaft of the three-phase motor 7, and a driven wheel 8 is installed on the input shaft of the speed reducer 5, and the driving wheel and the driven wheel 8 are connected by a transmission belt 6 .

The above are only preferred embodiments of the present utility model, and are not intended to limit the present utility model. Any simple modifications, changes and equivalent structural transformations made to the above embodiments according to the technical essence of the present utility model still belong to Within the scope of protection of the technical solution of the utility model.

Claims (6)

1. A rack-and-pinion pumping unit is characterized in that: it comprises an oil pumping mechanism and a power mechanism, and the oil pumping mechanism comprises a cylindrical fuselage (1) and is arranged in the cylindrical fuselage (1). The upper sucker rod (3), the lower sucker rod (21) and the linkage column (12), the upper end of the cylindrical fuselage (1) is equipped with a packing box (2), and the cylindrical fuselage ( The lower end of 1) is equipped with an oil pipe (11), the lower end of the upper sucker rod (3) is connected with the upper end of the linkage column (12), and the upper end of the upper sucker rod (3) extends out of the packing box ( 2) and is in sliding fit with the packing box (2), the upper end of the lower sucker rod (21) is connected with the lower end of the linkage column (12), and the lower end of the lower sucker rod (21) The lower end extends into the oil pipe (11); the power mechanism includes a three-phase motor (7) and a reducer (5) and a motor control system for controlling forward and reverse rotation of the three-phase motor (7). The output shaft of the phase motor (7) is connected with the input shaft of the speed reducer (5), the output shaft of the speed reducer (5) stretches into the cylindrical body (1), and the speed reducer (5) ) where the output shaft extends into the tubular body (1) and a gear (13) is installed, and the linkage column (12) is provided with a rack (14) meshing with the gear (13), so The rack (14) is arranged along the length direction of the cylindrical fuselage (1). 2. A rack and pinion pumping unit according to claim 1, characterized in that: the motor control system includes a start switch S1, a stop switch S2, a contactor KM1, a contactor KM2, an upper limit switch (19 ) and the lower limit switch (20), the coil of the contactor KM1, the normally closed contact of the upper limit switch (19), one end after the start switch S1 and the stop switch S2 are connected in series with the B-phase output end of the three-phase AC power supply connected, the other end of the coil of the contactor KM1, the normally closed contact of the upper limit switch (19), the start switch S1 and the stop switch S2 connected in series with the C-phase output end of the three-phase AC power supply, the contactor The main contact of KM1 and the normally open contact of the lower limit switch (20) are all connected in parallel with the start switch S1; the coil of the contactor KM2, the normally closed contact of the lower limit switch (20) and the upper limit switch ( One end of the normally open contact of 19) connected in series with the connection end of the start switch S1 and the stop switch S2, the coil of the contactor KM2, the normally closed contact of the lower limit switch (20) and the upper limit switch (19) The other end of the normally open contacts connected in series is connected with the C-phase output end of the three-phase AC power supply, and the main contact of the contactor KM2 is connected in parallel with the normally open contacts of the upper limit switch (19); the three-phase motor (7 )’s A-phase coil, B-phase coil and C-phase coil are respectively connected to the A-phase output terminal, B-phase output terminal and C-phase output terminal of the three-phase AC power supply through the three auxiliary contacts of the contactor KM1. The B-phase coil, the A-phase coil and the C-phase coil of the phase motor (7) are respectively connected to the A-phase output terminal, the B-phase output terminal and the C-phase output terminal of the three-phase AC power supply through three auxiliary contacts of the contactor KM2. Corresponding connection; the upper limit switch (19) is arranged on the upper end of the linkage column (12), the lower limit switch (20) is arranged on the lower end of the linkage column (12), and the upper part of the cylindrical body (1) An upper limit block (15) for cooperating with the upper limit switch (19) is provided, and a lower limit block (16) for cooperating with the lower limit switch (20) is provided on the lower part of the cylindrical body (1) . 3. A rack and pinion pumping unit according to claim 2, characterized in that: the coil of the contactor KM1, the normally closed contact of the upper limit switch (19), the start switch S1 and the stop switch S2 One end connected in series is connected to the B-phase output end of the three-phase AC power supply through the fuse FU. 4. A rack-and-pinion pumping unit according to claim 2, characterized in that: the upper part of the cylindrical fuselage (1) is provided with a plurality of upper limit blocks for installing upper limit blocks (15) Holes (17), a plurality of the upper limit holes (17) are arranged at intervals along the length direction of the cylindrical body (1), and the lower part of the cylindrical body (1) is provided with a plurality of upper limit holes for installing the lower limit. The lower limit hole (18) of the position block (16), a plurality of the lower limit holes (18) are arranged at intervals along the length direction of the cylindrical fuselage (1). 5. A rack-and-pinion pumping unit according to claim 1, characterized in that: a running wheel (4) is installed on the output shaft of the reducer (5), and A steel wire rope (9) is wound, one end of the steel wire rope (9) is fixed on the rotating wheel (4), and the other end of the steel wire rope (9) is vertically downward and connected with a balance weight (10). 6. A rack-and-pinion pumping unit according to claim 1, characterized in that: a drive wheel is installed on the output shaft of the three-phase motor (7), and the input shaft of the reducer (5) A driven wheel (8) is installed on it, and the driving wheel and the driven wheel (8) are connected through a transmission belt (6).