Sand-proof sealing structure of oil pumping unit
By installing a split cover plate and self-lubricating components on the polished rod of the pumping unit, and using lubricating balls to automatically apply grease, the problem of rapid grease consumption and wear caused by the wear is solved, resulting in better wind and sand sealing and extended polished rod life.
Patent Information
- Application Number
- CN202520776954.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-04-23
- Publication Date
- 2026-02-17
- Estimated Expiration
- 2035-04-23
AI Technical Summary
In the existing wind and sand protection sealing structure of the oil pumping unit's polished rod, the lubricating grease comes into contact with external sand particles during the protection process, leading to rapid consumption, accelerated wear on the polished rod surface, and a deterioration in the sealing effect.
It adopts a split cover plate structure, combined with sand-proof rubber pads, scraper rubber strips and self-lubricating components, including lubricating balls and solid grease blocks. The lubricating balls automatically apply grease during the movement of the polished rod, reducing grease consumption.
It effectively reduces wear on the surface of the oil pumping unit's polished rod, improves the wind and sand sealing effect, and ensures the long service life of the polished rod in windy and sandy areas.
Smart Images
Figure CN223923015U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of oil pumping unit technology, and in particular to a wind and sand protection sealing structure for oil pumping units. Background Technology
[0002] When extracting oil in areas with strong winds and sandstorms, the sucker rod of the pumping unit is prone to contact with sand particles in the external environment during its upward movement. This causes the external sand particles to adhere to the sucker rod and enter the packing. Once the external sand particles enter the packing, they can easily damage the packing. Therefore, it is necessary to protect the sucker rod from wind and sand.
[0003] Currently, when treating the polished rod of a pumping unit for wind and sand protection, a cylindrical protective cover is directly installed on the upper side of the pumping unit packing. A sealing ring for scraping is installed at the contact point between the protective cover and the polished rod. This allows the sealing ring on the protective cover to effectively prevent sand particles adhering to the polished rod from entering the pumping unit packing during the up-and-down movement of the polished rod.
[0004] While existing wind and sand sealing structures for oil pumping unit polished rods can provide wind and sand protection, the grease on the surface of the polished rod comes into contact with external sand particles during the protection process. As the sand particles are continuously scraped off, the grease on the surface of the polished rod is rapidly consumed. Over time, this can lead to increased wear on the surface of the polished rod, resulting in a deterioration in its wind and sand sealing performance. Summary of the Invention
[0005] To address the shortcomings of existing technologies, the purpose of this application is to provide a sand-proof sealing structure for a pumping unit that can automatically lubricate the polished rod of the pumping unit while providing a sand-proof seal, thereby reducing wear on the surface of the polished rod.
[0006] The above-mentioned objective of this application is achieved through the following technical solution:
[0007] A wind and sand sealing structure for an oil pumping unit includes two separate cover plates. A polished rod of the oil pumping unit passes through the two separate cover plates. Sand-proof gaskets are installed between the tops of the two separate cover plates and the polished rod. A scraping strip is installed at the contact point between the sand-proof gasket and the polished rod, with a pre-existing scraping gap between the scraping strip and the surface of the polished rod. Each separate cover plate includes a baffle plate and connecting plates, wherein each separate cover plate has two connecting plates, and the baffle plate is located between the two connecting plates. A self-lubricating assembly is installed in the middle of the baffle plate. The components include connecting columns, mounting brackets, lubricating balls, solid grease blocks, push plates, slide rods, springs, and limiting heads. The mounting brackets are installed on the side of the baffle plate facing the polished rod of the pumping unit. The lubricating balls are rotatably installed in the mounting brackets. Two connecting columns are symmetrically installed at both ends of the mounting brackets. The push plate is located on the side of the mounting bracket away from the polished rod of the pumping unit. The solid grease blocks are installed on the side of the push plate facing the lubricating balls. The slide rod is installed on the side of the push plate away from the solid grease blocks. The limiting head is installed on the exposed end of the slide rod. The spring is installed between the limiting head and the outer wall of the baffle plate.
[0008] Optionally, a connecting assembly is also installed between the split cover plates, the connecting assembly including a connecting block, a locking nut, and a locking bolt.
[0009] Optionally, the connecting blocks are installed on both sides of the connecting plate, the locking bolts pass through the two connecting blocks on the same side, and the locking nuts are screwed into the free end of the locking bolts.
[0010] Optionally, the middle part of the connecting plate and the interior of the shielding plate are both arc-shaped structures, and the connecting plate is welded to the shielding plate.
[0011] Optionally, the sandproof rubber pad has an arc-shaped structure and is welded to the connecting plate, with three layers of scraping rubber strips on each sandproof rubber pad.
[0012] Optionally, one end of the connecting column is bolted to the baffle plate, and the other end of the connecting column is welded to the mounting bracket.
[0013] Optionally, the lubricating ball is in contact with both the oil pump's polished rod and the solid grease block, and the solid grease block is inserted into the push plate.
[0014] Optionally, the push plate is welded to the slide rod, the slide rod is a square rod, the slide rod passes through the baffle plate and slides with the baffle plate.
[0015] Optionally, one end of the spring is welded to the limiting head, and the other end of the spring is welded to the outer wall of the baffle plate.
[0016] In summary, this application includes at least one of the following beneficial technical effects:
[0017] This invention utilizes a pre-existing gap between the scraping strip on the sand-proof mat and the polished rod of the pumping unit. A self-lubricating assembly, consisting of a connecting column, mounting bracket, lubricating balls, solid grease blocks, push plate, slide rod, spring, and limit head, is installed on a split cover plate. During the up-and-down movement of the polished rod, the lubricating balls contact the surface of the polished rod and the solid grease blocks, ensuring the grease is properly coated onto the polished rod surface. This reduces the risk of accelerated wear on the polished rod surface due to rapid grease consumption during sandstorm protection, thus ensuring the service life of the polished rod and maintaining its sand-proof sealing effect. Attached Figure Description
[0018] Figure 1 This is a schematic diagram of the structure provided in the embodiments of this application;
[0019] Figure 2 This is a main sectional view provided in an embodiment of this application;
[0020] Figure 3 This is provided by the embodiments of this application. Figure 2 Enlarged view of point A in the middle;
[0021] Figure 4 This is a top sectional view provided in an embodiment of this application;
[0022] Figure 5 This is a schematic diagram of the structure of the self-lubricating component provided in the embodiments of this application.
[0023] Explanation of reference numerals in the attached drawings: 1. Polished rod of the pumping unit; 2. Connecting assembly; 21. Connecting block; 22. Locking nut; 23. Locking bolt; 3. Split cover plate; 31. Baffle plate; 32. Connecting plate; 4. Sandproof rubber pad; 5. Scraper rubber strip; 6. Lubrication assembly; 61. Connecting column; 62. Mounting bracket; 63. Lubricating ball; 64. Solid grease block; 65. Push plate; 66. Slide rod; 67. Spring; 68. Limit head. Detailed Implementation
[0024] The present application will be further described in detail below with reference to the accompanying drawings.
[0025] To better understand the technical solutions presented in the embodiments of this application, we will first introduce the existing methods for preventing wind and sand from entering the polished rod of an oil pumping unit.
[0026] Currently, when treating the polished rod of a pumping unit for wind and sand protection, a cylindrical protective cover is directly installed on the upper side of the pumping unit packing. A sealing ring for scraping is installed at the contact point between the protective cover and the polished rod. This allows the sealing ring on the protective cover to effectively prevent sand particles adhering to the polished rod from entering the pumping unit packing during the up-and-down movement of the polished rod.
[0027] Please see Figures 1-5 This application discloses a wind and sand sealing structure for an oil pumping unit, comprising two split-type cover plates 3. A polished rod 1 of the oil pumping unit passes through the two split-type cover plates 3. Sand-proof rubber pads 4 are installed between the tops of the two split-type cover plates 3 and the polished rod 1. A scraping rubber strip 5 is installed at the contact point between the sand-proof rubber pad 4 and the polished rod 1. A scraping gap is pre-reserved between the scraping rubber strip 5 and the surface of the polished rod 1. Each split-type cover plate 3 includes a baffle plate 31 and connecting plates 32. Each split-type cover plate 3 has two connecting plates 32, and the baffle plate 31 is located between the two connecting plates 32. A self-lubricating component 6 is installed in the middle of the baffle plate 31. The self-lubricating component 6 includes... The assembly includes a connecting post 61, a mounting bracket 62, lubricating balls 63, a solid grease block 64, a push plate 65, a slide rod 66, a spring 67, and a limiting head 68. The mounting bracket 62 is installed on the side of the shielding plate 31 facing the polished rod 1 of the pumping unit. The lubricating balls 63 are rolled in the mounting bracket 62. Two connecting posts 61 are symmetrically installed at both ends of the mounting bracket 62. The push plate 65 is located on the side of the mounting bracket 62 away from the polished rod 1 of the pumping unit. The solid grease block 64 is installed on the side of the push plate 65 facing the lubricating balls 63. The slide rod 66 is installed on the side of the push plate 65 away from the solid grease block 64. The limiting head 68 is installed on the exposed end of the slide rod 66. The spring 67 is installed between the limiting head 68 and the outer wall of the shielding plate 31.
[0028] Specifically, when sealing the polished rod 1 of the pumping unit against wind and sand, the two separate cover plates 3 are first brought close together from both sides of the polished rod 1, and the separate cover plates 3 are installed on the upper side of the pumping unit packing. Then, when the polished rod 1 moves up and down to pump oil, the scraping strips 5 on the sand-proof rubber pad 4 are used to scrape off the sand particles adhering to the surface of the polished rod 1. After the sand particles are scraped off, as the polished rod 1 moves down, the lubricating balls 63 on the mounting bracket 62 will continuously roll. While rolling, the lubricating balls 63 will coat the solid grease on the solid grease block 64 onto the outer wall of the polished rod 1, so as to reduce the rapid consumption of surface grease during wind and sand protection, which would lead to increased wear on the surface of the polished rod 1. This makes the wind and sand sealing effect of the polished rod 1 better when extracting oil in areas with strong winds and sand.
[0029] Please see Figure 1 and Figure 4A connecting component 2 is also installed between the split cover plates 3. The connecting component 2 includes a connecting block 21, a locking nut 22, and a locking bolt 23.
[0030] As one implementation method, after the two split cover plates 3 are assembled on the upper side of the pumping unit packing, the locking bolts 23 are simply passed through the connecting block 21 and the free end of the locking bolts 23 is locked under the action of the locking nut 22, so that the split cover plates 3 can be reliably installed on the upper side of the pumping unit packing.
[0031] Please see Figure 1 and Figure 4 Connecting blocks 21 are installed on both sides of connecting plate 32, and locking bolts 23 pass through the two connecting blocks 21 on the same side. Locking nuts 22 are screwed into the free end of locking bolts 23.
[0032] In one implementation, the middle part of the connecting block 21 is hollow to facilitate the easy passage of the locking bolt 23. The connecting block 21 and the corresponding connecting plate 32 are welded and fixed to ensure that after the locking bolt 23 and the locking nut 22 are screwed together, the two split cover plates 3 can be reliably assembled with the help of the connecting plate 32.
[0033] Please see Figure 1 , Figure 2 and Figure 4 The middle part of the connecting plate 32 and the interior of the shielding plate 31 are both arc-shaped structures, and the connecting plate 32 and the shielding plate 31 are welded together.
[0034] As one implementation method, the middle part of the connecting plate 32 and the interior of the baffle plate 31 are both arc-shaped structures, which can ensure the easy passage of the oil pumping unit's polished rod 1.
[0035] Please see Figure 2 and Figure 3 The sand-proof rubber pad 4 has an arc-shaped structure and is welded to the connecting plate 32. Each sand-proof rubber pad 4 has three layers of scraping rubber strips 5.
[0036] In one implementation, after the two sand-proof rubber pads 4 are aligned, they form a sealing ring covering the outside of the oil pumping unit's polished rod 1. With the help of the scraping action of the scraping rubber strip 5 on the outside of the oil pumping unit's polished rod 1, the sand particles adhering to the outside of the oil pumping unit's polished rod 1 can be easily scraped off.
[0037] Please see Figure 4 One end of the connecting column 61 is bolted to the baffle plate 31, and the other end of the connecting column 61 is welded to the mounting bracket 62.
[0038] As one implementation method, the connecting column 61 is mainly used to ensure the reliable installation of the mounting bracket 62 within the baffle plate 31. At the same time, the position of the mounting bracket 62 needs to ensure that the lubrication ball 63 contacts the outer wall of the oil pumping unit's polished rod 1 after the baffle plate 31 is installed.
[0039] Please see Figure 2 , Figure 4 and Figure 5 The lubricating ball 63 is in contact with the oil pumping unit polished rod 1 and the solid grease block 64, and the solid grease block 64 is inserted into the push plate 65.
[0040] In one implementation, the push plate 65 is mainly used to provide a mounting base for the solid grease block 64 to ensure that the solid grease block 64 is in continuous contact with the lubricating ball 63 under the action of the spring 67.
[0041] Please see Figure 2 , Figure 4 and Figure 5 The push plate 65 is welded to the slide rod 66, which is a square rod that passes through the baffle plate 31 and slides with the baffle plate 31.
[0042] As one implementation, the square rod-shaped structure of the smooth rod ensures that the slide bar 66 does not rotate when sliding relative to the baffle plate 31.
[0043] Please see Figure 1 , Figure 2 and Figure 4 One end of the spring 67 is welded to the limiting head 68, and the other end of the spring 67 is welded to the outer wall of the baffle plate 31.
[0044] In one implementation, the spring 67 is mainly used to push the slide bar 66 inward toward the baffle plate 31 so that the push plate 65 is pushed toward the mounting bracket 62 under the action of the slide bar 66, ensuring continuous contact between the solid grease block 64 and the lubricating ball 63.
[0045] The specific working principle is as follows: When sealing the polished rod 1 of the pumping unit against wind and sand, the two separate cover plates 3 are first brought close together from both sides of the polished rod 1, and the separate cover plates 3 are installed on the upper side of the pumping unit packing. Then, when the polished rod 1 moves up and down to pump oil, the scraping rubber strips 5 on the sandproof rubber pad 4 are used to scrape off the sand particles adhering to the surface of the polished rod 1. After the sand particles are scraped off, as the polished rod 1 moves down, the lubricating balls 63 on the mounting bracket 62 will continuously roll. While rolling, the lubricating balls 63 will spread solid grease. The solid grease on block 64 is coated onto the outer wall of the polished rod 1 of the pumping unit, thereby achieving a wind and sand seal on the upper side of the packing of the polished rod 1. Due to the action of this wind and sand seal structure, while scraping away sand particles on the outside of the polished rod 1, the polished rod 1 is automatically coated and lubricated. This effectively reduces the situation where the surface wear of the polished rod 1 is aggravated due to the rapid consumption of surface grease during wind and sand protection, and makes the wind and sand seal effect of the polished rod 1 better when extracting oil in areas with strong winds and sand.
[0046] The embodiments described in this specific implementation are preferred embodiments of this application and are not intended to limit the scope of protection of this application. Therefore, all equivalent changes made in accordance with the structure, shape and principle of this application should be covered within the scope of protection of this application.
Claims
1. A wind-sand sealing structure for a pumping unit, characterized in that: The utility model provides a kind of sand-proof device for pumping unit, including split cover plate (3), the split cover plate (3) has two, and pumping unit polished rod (1) is passed through between two split cover plate (3), and sand-proof rubber pad (4) is installed between the top of two split cover plate (3) and pumping unit polished rod (1), and the contact part of sand-proof rubber pad (4) and pumping unit polished rod (1) is installed with scraping rubber strip (5), and scraping rubber strip (5) and the surface of pumping unit polished rod (1) are reserved with scraping clearance, and each split cover plate (3) includes baffle (31) and connecting plate (32), wherein each split cover plate (3) has two connecting plate (32), and baffle (31) is located between two connecting plate (32);Self-lubricating assembly (6) is installed in the middle of baffle (31), and self-lubricating assembly (6) includes connecting column (61), mounting frame (62), lubricating ball (63), solid lubricating grease block (64), push plate (65), slide bar (66), spring (67) and limit head (68), mounting frame (62) is installed on the side of baffle (31) facing pumping unit polished rod (1), lubricating ball (63) is installed in mounting frame (62) and rolls, two connecting column (61) is symmetrically installed at the both ends of mounting frame (62), push plate (65) is located on the side of mounting frame (62) away from pumping unit polished rod (1), solid lubricating grease block (64) is installed on the side of push plate (65) facing lubricating ball (63), slide bar (66) is installed on the side of push plate (65) away from solid lubricating grease block (64), limit head (68) is installed on the exposed end of slide bar (66), and spring (67) is installed between limit head (68) and the outer wall of baffle (31).
2. The wind and sand sealing structure of a pumping unit according to claim 1, characterized in that: Connecting assembly (2) is also installed between the split cover plate (3), and the connecting assembly (2) includes connecting block (21), locking nut (22) and locking bolt (23).
3. The wind and sand sealing structure of a pumping unit according to claim 2, characterized in that: The connecting block (21) is installed on both sides of the connecting plate (32), the locking bolt (23) penetrates the two connecting blocks (21) on the same side, and the locking nut (22) is screwed with the free end of the locking bolt (23).
4. The wind and sand sealing structure of a pumping unit according to claim 1, characterized in that: The middle of the connecting plate (32) and the inside of the baffle (31) are both arc-shaped structures, and the connecting plate (32) and the baffle (31) are welded.
5. The wind and sand sealing structure of a pumping unit according to claim 4, characterized in that: The sand-proof rubber pad (4) is arc-shaped, and the sand-proof rubber pad (4) is welded with the connecting plate (32), and each sand-proof rubber pad (4) has three layers of scraping rubber strips (5).
6. The wind and sand sealing structure of a pumping unit according to claim 1, characterized in that: One end of the connecting column (61) is bolted with the baffle (31), and the other end of the connecting column (61) is welded with the mounting frame (62).
7. The wind and sand sealing structure of a pumping unit according to claim 6, characterized in that: The lubricating ball (63) contacts with the pumping unit polished rod (1) and the solid lubricating grease block (64), and the solid lubricating grease block (64) is inserted with the push plate (65).
8. The wind and sand sealing structure of a pumping unit according to claim 7, characterized in that: The push plate (65) is welded with the slide bar (66), the slide bar (66) is a square bar, the slide bar (66) penetrates through the shielding plate (31) and is in sliding fit with the shielding plate (31).
9. The wind and sand sealing structure of a pumping unit according to claim 8, characterized in that: One end of the spring (67) is welded with the limiting head (68), and the other end of the spring (67) is welded with the outer wall of the shielding plate (31).