A belt-type oil pumping unit for oil and gas collection

Abstract

The present invention provides a belt-type oil pumping unit for oil and gas collection, which relates to the technical field of oil pumping units and includes: a bracket, a support roller, a connecting belt, a counterweight, a connecting block, an oil pumping member and a connecting rope; a fixing frame is fixedly connected to the upper surface of the bracket, a buffer oil cylinder and a reset oil cylinder are fixedly connected to the fixing frame, a supporting wheel is rotatably connected between the driving shaft of the buffer oil cylinder and the driving shaft of the reset oil cylinder, a connecting rope sleeve is arranged on the outer side of the supporting wheel, and the bracket is provided with a driving mechanism for driving the counterweight to move in the vertical direction; a buffer chute is provided at the beginning of the bracket in the vertical direction, an oil storage cavity is provided inside the counterweight and the connecting block, an oil delivery pipe is connected between the buffer oil cylinder and the oil storage cavity, a piston is slidably connected in the oil storage cavity, and a friction block that can abut against the bottom wall of the buffer chute is fixedly connected to the piston. The present invention has the effect of reducing the probability of the connecting rope being broken due to excessive load.

Description

Technical Field

[0001] The invention relates to the technical field of oil pumping units, and in particular to a belt-type oil pumping unit for oil and gas collection. Background Art

[0002] The belt pumping unit is a kind of oil extraction equipment, which is suitable for large pumps with rod pumps to lift liquid, small pumps to pump deep and heavy oil. The belt pumping unit adopts a chain belt pumping unit design with pure mechanical transmission, which has the characteristics of long stroke and low stroke frequency, and can effectively reduce the wear and tear of downhole equipment and operating costs. The belt drive uses a long-life heavy-duty belt to transmit power, so that the pumping parts descend into the oil well to extract oil. During the operation of the existing tower pumping unit, the belt will age and wear, and the pumping parts will experience a surge in load due to complex conditions underground. These factors will cause the belt to break suddenly, and safety agencies are required to protect against this sudden phenomenon.

[0003] For example, the Chinese patent for a vertical oil pump with belt break protection function, whose authorization announcement number is CN108979596B, states that when the connecting belt breaks, two steel ropes can pull the oil pumping parts or the counterweight box upward, thereby preventing the oil pumping parts or the counterweight box from falling due to momentary imbalance.

[0004] With regard to the above-mentioned related technologies, when the belt breaks, the gravity of the oil pumping component and the counterweight block instantly acts on the safety rope. At the same time, the oil pumping component and the counterweight block will move downward to tighten the wire rope. The pulling force generated by the oil pumping component and the counterweight block instantly acts on the wire rope. When the load of the oil pumping component surges due to complex conditions underground, it is difficult to judge the size of the load acting on the wire rope through the oil pumping component underground. When the maximum load borne by the wire rope is greater than its predetermined load, the wire rope will break, causing the oil pumping component and the counterweight block to fall freely and cause an operating accident. Summary of the invention

[0005] In view of this, the present invention provides a belt-type oil pumping unit for oil and gas collection, aiming to solve the problem that it is difficult to judge the size of the load acting on the wire rope by the pumping component. When the maximum load borne by the wire rope is greater than its predetermined load, the wire rope will break and cause an operating accident.

[0006] In order to solve the above technical problems, the present invention provides a belt-type oil pumping unit for oil and gas collection, comprising a bracket, a supporting roller, a connecting belt, a counterweight block and a connecting block fixedly connected to both ends of the connecting belt, an oil pumping piece connected to the connecting block, and a connecting rope connected between the counterweight block and the connecting block; a fixing frame is fixedly connected to the upper surface of the bracket, a buffer oil cylinder and a reset oil cylinder are fixedly connected to the fixing frame, a supporting wheel is rotatably connected between the buffer oil cylinder and the reset oil cylinder, the connecting rope sleeve is arranged on the outer side surface of the supporting wheel, and the bracket is provided with a driving mechanism for driving the counterweight block to move in the vertical direction; a buffer slide groove is vertically provided on the bracket, an oil storage cavity is provided inside the counterweight block and the connecting block, an oil pipeline is connected between the buffer oil cylinder and the oil storage cavity, a piston is slidably connected in the oil storage cavity, and the piston is fixedly connected with a friction block that can abut against the bottom wall of the buffer slide groove.

[0007] By adopting the above technical scheme, when the connecting belt breaks, the falling of the counterweight block and the connecting block is used as a power source to drive the flow of hydraulic oil in the buffer cylinder, thereby buffering the falling of the counterweight block and the transmission block, and at the same time buffering the load acting on the connecting block through the oil pumping part underground, reducing the load on the connecting rope from the counterweight block and the connecting block, reducing the probability of the connecting rope breaking due to excessive load, and reducing the probability of working condition accidents.

[0008] Optionally, the driving mechanism includes a rotation source, a first sprocket, a transmission chain, a second sprocket and a transmission block, the rotation source is fixedly connected to the bracket, the first sprocket is fixedly sleeved on the driving shaft of the rotation source, the second sprocket is rotatably connected to the bracket and is arranged above the first sprocket, the first sprocket and the second sprocket are both engaged with the transmission chain, and the transmission block is fixedly connected to the transmission chain and the counterweight block, respectively.

[0009] Optionally, the connecting block is rotatably connected to a guide wheel, and the guide wheel can abut against the side wall of the buffer chute.

[0010] By adopting the above technical solution, when the connecting block shakes, the connecting block drives the guide wheel to move through the friction block, and the guide wheel abuts against the side wall of the buffer chute. The guide wheel guides the axial movement of the connecting block along the buffer chute, thereby improving the stability of the movement of the connecting block and facilitating the stable collection of oil and gas.

[0011] Optionally, a buffer spring is connected between the buffer cylinder and the support wheel.

[0012] By adopting the above technical solution, the buffer spring is compressed to absorb the energy of the counterweight block and the transmission block driving the connecting rope to move downward, thereby improving the effect of preventing the counterweight block and the transmission block from falling.

[0013] Optionally, the driving shaft of the reset cylinder is fixedly connected to a support shell, the support shell is provided with a guide groove, the support wheel is coaxially fixedly connected to a transmission gear, the transmission gear is connected to the guide groove, the support shell is fixedly connected to a limit plate, and the limit plate is internally slidably connected with a transmission rack that can mesh with the transmission gear.

[0014] Optionally, the transmission rack is fixedly connected with a guide slide bar, the guide slide bar is slidably connected with the limit plate, and a return spring is sleeved on the side surface of the guide slide bar.

[0015] By adopting the above technical solution, when the weight of the counterweight block and the connecting block are not equal, the guide wheel limits the movement of the connecting rope, and at the same time cooperates with the friction block to buffer the counterweight block and the connecting block, thereby reducing the probability of the connecting rope falling to one side due to the unequal weight of the counterweights on both sides.

[0016] Optionally, the fixing frame is rotatably connected to a limiting wheel, and the connecting rope loop is arranged on a side wall of the limiting wheel.

[0017] Optionally, the bracket is fixedly connected to a plurality of observation panels along the vertical direction, and a climbing ladder is fixedly connected between two adjacent observation panels.

[0018] By adopting the above technical solution, construction workers use climbing ladders to move to different observation boards to observe specific construction conditions.

[0019] In summary, compared with the prior art, the present invention includes at least one of the following beneficial technical effects:

[0020] 1. When the connecting belt breaks, the falling of the counterweight block and the connecting block is used as the power source to drive the flow of hydraulic oil in the buffer cylinder, which buffers the falling of the counterweight block and the transmission block. At the same time, it buffers the load on the connecting block through the pumping parts underground, reduces the load on the connecting rope from the counterweight block and the connecting block, reduces the probability of the connecting rope being broken due to excessive load, and reduces the probability of working accidents.

[0021] 2. The drive shaft of the reset oil cylinder contracts to drive the support wheel to move and reset, and at the same time, the drive shaft of the buffer oil cylinder extends. The hydraulic oil in the oil storage chamber flows to the buffer oil cylinder through the oil pipe, so that the friction block is separated from the bottom wall of the buffer chute. The reset oil cylinder drives the connecting rope to move upward through the support wheel, and the counterweight block and the connecting block move upward synchronously with the connecting rope, reducing the distance between the counterweight block and the support roller, and the distance between the connecting block and the support roller. The reset oil cylinder controls the distance that the counterweight block and the connecting block move upward, so that when the connecting belt between the counterweight block and the connecting block is reinstalled, the connecting belt is in a relaxed state, which reduces the difficulty of installing the connecting belt.

[0022] 3. When the weight of the counterweight block and the connecting block are not equal, the guide wheel limits the movement of the connecting rope and cooperates with the friction block to buffer the counterweight block and the connecting block, thereby reducing the probability of the connecting rope falling to one side due to the unequal weight of the counterweights on both sides. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the overall structure of an embodiment of the present invention;

[0024] Figure 2 A schematic diagram of the internal structure of a bracket according to an embodiment of the present invention;

[0025] Figure 3 This is a schematic diagram of the structure of a connecting rope, a counterweight block and a connecting block according to an embodiment of the present invention;

[0026] Figure 4 It is a structural schematic diagram of a fixing frame according to an embodiment of the present invention;

[0027] Figure 5 A schematic diagram of the internal structure of the supporting housing according to an embodiment of the present invention;

[0028] Figure 6 It is a schematic diagram of the structure of the friction block and the buffer chute according to an embodiment of the present invention.

[0029] Explanation of the accompanying drawings: 1. bracket; 11. support roller; 12. connecting belt; 13. counterweight; 14. connecting block; 141. oil pumping part; 15. connecting rope; 16. buffer slide; 17. observation plate; 18. climbing ladder; 2. fixed frame; 21. buffer cylinder; 221. buffer spring; 22. reset cylinder; 23. support wheel; 24. limit wheel; 3. driving mechanism; 31. rotation source; 32. first sprocket; 33. transmission chain; 34. second sprocket; 35. transmission block; 4. oil storage chamber; 41. oil pipeline; 42. piston; 43. friction block; 431. guide wheel; 5. supporting shell; 51. guide groove; 52. transmission gear; 53. limit plate; 54. transmission rack; 541. guide slide rod; 542. reset spring. DETAILED DESCRIPTION

[0030] To make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the following will be combined with the embodiments of the present invention. Figure 1-Figure 6 , the technical scheme of the embodiment of the present invention is clearly and completely described. Obviously, the described embodiment is a part of the embodiment of the present invention, not all of the embodiments. Based on the described embodiment of the present invention, all other embodiments obtained by ordinary technicians in this field belong to the scope of protection of the present invention.

[0031] This embodiment provides a belt-type oil pumping unit for oil and gas collection, referring to Figure 1 , Figure 2and Figure 3 A belt-type oil pumping unit for oil and gas collection includes a bracket 1, a support roller 11, a connecting belt 12, a counterweight block 13, a connecting block 14, an oil pumping member 141, a connecting rope 15, a fixing frame 2, a buffer cylinder 21, a reset cylinder 22, a support wheel 23, a driving mechanism 3 and a buffer mechanism.

[0032] Reference Figure 2 , Figure 3 and Figure 4 The support 1 is erected on a horizontal plane, the support roller 11 is rotatably connected to the support 1, the connecting belt 12 is sleeved on the side wall of the support roller 11, the counterweight 13 and the connecting block 14 are fixedly connected to the two ends of the connecting belt 12, the connecting block 14 is fixedly connected to the oil pumping member 141, the counterweight 13 is fixedly connected to the driving mechanism 3, and the driving mechanism 3 is arranged at the lower end of the support 1, and is used to drive the counterweight 13 to move in the vertical direction. The driving mechanism 3 drives the oil pumping member 141 to move in the vertical direction through the counterweight 13, the connecting belt 12 and the connecting block 14, so that the oil pumping member 141 enters the oil well to collect oil and gas. The connecting rope 15 is fixedly connected between the counterweight 13 and the connecting block 14.

[0033] Reference Figure 4 and Figure 5 The fixed frame 2 is fixedly connected to the upper surface of the bracket 1, and the fixed frame 2 is fixedly connected with multiple buffer cylinders 21 and multiple reset cylinders 22, wherein each buffer cylinder 21 is coaxially arranged with a reset cylinder 22, and the support wheel 23 is connected between the drive shaft of the buffer cylinder 21 and the drive shaft of the reset cylinder 22. The fixed frame 2 is rotatably connected with a limiting wheel 24, and the limiting wheel 24 is arranged on the left and right sides of the supporting wheel 23, and the connecting rope 15 is wound around the outer side surfaces of the supporting wheel 23 and the limiting wheel 24.

[0034] Reference Figure 3 and Figure 6 The bracket 1 is provided with a buffer chute 16 in the vertical direction, and an oil storage chamber 4 is provided inside the counterweight block 13 and the connecting block 14. The oil storage chamber 4 is provided horizontally, and a buffer mechanism is provided on the counterweight block 13 and the connecting block 14 to buffer the downward movement of the counterweight block 13 and the connecting block 14. The buffer mechanism includes an oil pipe 41, a piston 42 and a friction block 43. Four oil pipes 41 are provided, two of which are fixedly connected between the counterweight block 13 and the buffer cylinder 21, and the other two oil pipes 41 are fixedly connected between the connecting block 14 and the buffer cylinder 21. The two ends of the oil pipe 41 are respectively connected to the oil storage chamber 4 provided in the counterweight block 13 and the inside of the buffer cylinder 21, and the two ends of the oil pipe 41 are respectively connected to the oil storage chamber 4 provided in the connecting block 14 and the inside of the buffer cylinder 21. The piston 42 is slidably connected in the oil storage chamber 4 , and the friction block 43 is fixedly connected to the piston 42 . The friction block 43 is arranged outside the oil storage chamber 4 , and the friction block 43 can abut against the bottom surface of the buffer chute 16 .

[0035] When the connecting belt 12 breaks, the counterweight 13 and the connecting block 14 move downward by their own weight. When the connecting rope 15 is tightened, the weight of the counterweight 13 and the connecting block 14 acts on the connecting rope 15, and the counterweight 13 and the connecting rope 15 drive the connecting rope 15 to press the supporting wheel 23 downward, so that the supporting wheel 23 pushes the driving shaft of the buffer cylinder 21 to move inside the buffer cylinder 21, and at the same time, the driving shaft of the reset cylinder 22 moves outside the reset cylinder 22. At this time, the counterweight 13, the connecting block 14 and the connecting rope 15 fall synchronously. In addition, the movement of the driving shaft of the buffer cylinder 21 and the driving shaft of the reset cylinder 22 can absorb the energy of the falling of the counterweight 13 and the transmission block 35, thereby reducing the probability of the connecting rope 15 being broken due to excessive load.

[0036] The hydraulic oil in the buffer cylinder 21 flows to the oil storage chamber 4 through the oil pipe 41, so that the piston 42 in the oil storage chamber 4 moves to the outside of the oil storage chamber 4, and the friction block 43 and the piston 42 move synchronously with the bottom wall of the buffer chute 16, and the friction force between the friction block 43 and the bottom wall of the buffer chute 16 is used to buffer the fall of the counterweight block 13 and the transmission block 35.

[0037] When the connecting belt 12 breaks, the falling of the counterweight block 13 and the connecting block 14 serves as a power source for driving the flow of hydraulic oil in the buffer cylinder 21, thereby buffering the falling of the counterweight block 13 and the transmission block 35, and at the same time buffering the load acting on the connecting block 14 through the pumping piece 141 underground, thereby reducing the load on the connecting rope 15 from the counterweight block 13 and the connecting block 14, further reducing the probability of the connecting rope 15 breaking due to excessive load, and reducing the probability of working condition accidents.

[0038] The drive shaft of the reset oil cylinder 22 contracts to drive the support wheel 23 to move and reset, and at the same time, the drive shaft of the buffer oil cylinder 21 is extended, and the hydraulic oil in the oil storage chamber 4 flows to the buffer oil cylinder 21 through the oil pipe 41, so that the friction block 43 is separated from the bottom wall of the buffer chute 16. The reset oil cylinder 22 drives the connecting rope 15 to move upward through the support wheel 23, and the counterweight block 13 and the connecting block 14 move upward synchronously with the connecting rope 15, reducing the distance between the counterweight block 13 and the support roller 11, and the distance between the connecting block 14 and the support roller 11. The reset oil cylinder 22 controls the distance that the counterweight block 13 and the connecting block 14 move upward, so that when the connecting belt 12 is reinstalled between the counterweight block 13 and the connecting block 14, the connecting belt 12 is in a relaxed state, which reduces the difficulty of installing the connecting belt 12.

[0039] Reference Figure 1 and Figure 2The driving mechanism 3 includes a rotation source 31, a first sprocket 32, a transmission chain 33, a second sprocket 34 and a transmission block 35. The rotation source 31 is fixedly connected to the bracket 1, the first sprocket 32 ​​is fixedly sleeved on the driving shaft of the rotation source 31, the second sprocket 34 is rotationally connected to the bracket 1 and is arranged above the first sprocket 32, the first sprocket 32 ​​and the second sprocket 34 are both engaged with the transmission chain 33, and the transmission block 35 is fixedly connected to the transmission chain 33 and the counterweight 13 respectively. The rotation source 31 drives the counterweight 13 to reciprocate in the vertical direction through the first sprocket 32 ​​and the transmission chain 33 in turn, the counterweight 13 moves synchronously with the transmission block 35, and the counterweight 13 drives the connecting block 14 to reciprocate in the vertical direction through the connecting belt 12.

[0040] Reference Figure 5 A buffer spring 221 is connected between the buffer cylinder 21 and the support wheel 23. The buffer spring 221 is sleeved on the driving shaft of the buffer cylinder 21. When the connecting rope 15 squeezes the support wheel 23 to move downward, the support wheel 23 squeezes the buffer spring 221, so that the buffer spring 221 is compressed. The buffer spring 221 is compressed to absorb the energy of the counterweight block 13 and the transmission block 35 driving the connecting rope 15 to move downward, thereby improving the buffering effect on the falling of the counterweight block 13 and the transmission block 35.

[0041] Reference Figure 6 The connecting block 14 is rotatably connected with a guide wheel 431. Due to the bad working conditions of the oil well, the oil well drives the connecting block 14 to shake through the pumping member 141. When the connecting block 14 shakes, the connecting block 14 drives the guide wheel 431 to move through the friction block 43. The guide wheel 431 abuts against the side wall of the buffer chute 16. The guide wheel 431 guides the axial movement of the connecting block 14 along the buffer chute 16, thereby improving the stability of the movement of the connecting block 14 and facilitating the stable collection of oil and gas.

[0042] Reference Figure 5 The driving shaft of the reset oil cylinder 22 is fixedly connected to the support housing 5, and the support housing 5 is provided with a guide groove 51, which is a waist-shaped groove. The support wheel 23 is coaxially fixedly connected with a transmission gear 52, which is connected to the guide groove 51, and the transmission gear 52 can rotate on its own, and the transmission gear 52 can also move along the length direction of the guide groove 51. The support housing 5 is fixedly connected to a limit plate 53, and a transmission rack 54 that can mesh with the transmission gear 52 is slidably connected inside the limit plate 53. The transmission rack 54 is fixedly connected to a guide slide bar 541, and the guide slide bar 541 is slidably connected to the limit plate 53, and a reset spring 542 is sleeved on the side of the guide slide bar 541.

[0043] At the moment when the connecting belt 12 breaks, due to inertia, the parts on both sides of the connecting rope 15 move upward on one side of the connecting rope 15 and move downward on the other side of the connecting rope 15. In this process, the connecting rope 15 drives the supporting wheel 23 to rotate. When the connecting rope 15 presses the supporting wheel 23 to move close to the buffer cylinder 21, the transmission gear 52 and the supporting wheel 23 move synchronously along the axial direction of the guide groove 51, so that the transmission gear 52 is meshed with the transmission rack 54, and the connecting rope 15 drives the transmission gear 52 to rotate through the supporting wheel 23, and the transmission gear 52 drives the transmission rack 54 to move axially along the guide slide bar 541, and the transmission rack 54 squeezes the return spring 542 to compress the return spring 542, and the return spring 542 limits the rotation of the guide wheel 431 through the transmission rack 54 and the transmission gear 52, and the guide wheel 431 limits the axial movement of the connecting rope 15 through friction. Therefore, when the weight of the counterweight block 13 and the connecting block 14 are not equal, the guide wheel 431 limits the movement of the connecting rope 15, and at the same time cooperates with the friction block 43 to buffer the counterweight block 13 and the connecting block 14, thereby reducing the probability of the connecting rope 15 falling to one side due to the unequal weight of the counterweights on both sides.

[0044] Reference Figure 1 The bracket 1 is fixedly connected with a plurality of observation panels 17 in the vertical direction, and a climbing ladder 18 is fixedly connected between two adjacent observation panels 17. The construction personnel use the climbing ladder 18 to move to different observation panels 17 to observe the specific construction conditions.

[0045] The implementation principle of a belt-type oil pumping unit for oil and gas collection in an embodiment of the present invention is as follows: when the connecting belt 12 breaks, the gravity of the counterweight block 13 and the connecting block 14 acts on the connecting rope 15, and the counterweight block 13 and the connecting rope 15 drive the connecting rope 15 to squeeze the support wheel 23 downward, so that the support wheel 23 pushes the driving axis of the buffer cylinder 21 to move inside the buffer cylinder 21, and the hydraulic oil in the buffer cylinder 21 flows to the oil storage chamber 4 through the oil pipe 41, so that the piston 42 in the oil storage chamber 4 moves toward the outside of the oil storage chamber 4, and the friction block 43 and the piston 42 move synchronously and abut against the bottom wall of the buffer chute 16, and the friction force between the friction block 43 and the bottom wall of the buffer chute 16 is used to buffer the fall of the counterweight block 13 and the transmission block 35.

[0046] In addition, it should be noted that in the description of the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For those skilled in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0047] The above are preferred embodiments of the present invention. It should be pointed out that, for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the principles of the present invention. These improvements and modifications should also be regarded as within the scope of protection of the present invention.

Claims

1. A belt-type oil pumping unit for oil and gas collection, comprising a bracket, a support roller, a connecting belt, a counterweight block and a connecting block fixedly connected to both ends of the connecting belt, an oil pumping member connected to the connecting block, and a connecting rope connected between the counterweight block and the connecting block, characterized in that: The upper surface of the bracket is fixedly connected with a fixing frame, the fixing frame is fixedly connected with a buffer oil cylinder and a reset oil cylinder, a support wheel is rotatably connected between the buffer oil cylinder and the reset oil cylinder, the connecting rope loop is arranged on the outer side of the support wheel, and the bracket is provided with a driving mechanism for driving the counterweight block to move in the vertical direction; The bracket is vertically provided with a buffer chute, the counterweight block and the connecting block are provided with an oil storage cavity, an oil delivery pipe is connected between the buffer oil cylinder and the oil storage cavity, a piston is slidably connected in the oil storage cavity, and the piston is fixedly connected with a friction block capable of abutting against the bottom wall of the buffer chute; The driving shaft of the reset cylinder is fixedly connected to a support shell, the support shell is provided with a guide groove, the support wheel is coaxially fixedly connected to a transmission gear, the transmission gear is connected to the guide groove, the support shell is fixedly connected to a limit plate, and a transmission rack that can mesh with the transmission gear is slidably connected inside the limit plate.

2. A belt-type pumping unit for oil and gas collection according to claim 1, characterized in that: The driving mechanism includes a rotation source, a first sprocket, a transmission chain, a second sprocket and a transmission block. The rotation source is fixedly connected to the bracket, the first sprocket is fixedly sleeved on the driving shaft of the rotation source, the second sprocket is rotatably connected to the bracket and is arranged above the first sprocket, the first sprocket and the second sprocket are both engaged with the transmission chain, and the transmission block is fixedly connected to the transmission chain and the counterweight block respectively.

3. A belt-type pumping unit for oil and gas collection according to claim 1, characterized in that: The connecting block is rotatably connected with a guide wheel, and the guide wheel can abut against the side wall of the buffer chute.

4. A belt-type pumping unit for oil and gas collection according to claim 1, characterized in that: A buffer spring is connected between the buffer oil cylinder and the supporting wheel.

5. The belt pumping unit for oil and gas collection according to claim 1, characterized in that: The transmission rack is fixedly connected with a guide slide bar, the guide slide bar is slidably connected with the limit plate, and a return spring is sleeved on the side surface of the guide slide bar.

6. A belt-type pumping unit for oil and gas collection according to claim 1, characterized in that: The fixing frame is rotatably connected to a limiting wheel, and the connecting rope sleeve is arranged on a side wall of the limiting wheel.

7. The belt pumping unit for oil and gas collection according to claim 1, characterized in that: The bracket is fixedly connected with a plurality of observation panels along the vertical direction, and a climbing ladder is fixedly connected between two adjacent observation panels.

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