Hydraulic pumping unit cylinder seal

Abstract

The utility model relates to hydraulic oil pumping unit technical field especially relates to a kind of hydraulic oil pumping unit oil cylinder sealing device, including cylinder body, the bottom end of cylinder body is equipped with flange, the bottom of flange is equipped with cylinder head, the inside of cylinder body and cylinder head is equipped with piston rod, the bottom end inside cylinder head is provided with the compact mechanism for sealing piston rod, compact mechanism includes sealing sleeve, pressure ring and threaded sleeve, the bottom end of cylinder head inside is equipped with sealing sleeve, the bottom end of sealing sleeve inside is pasted with piston rod, the outside of sealing sleeve is slidably connected with pressure ring;The utility model is assembled and spliced into shape between cylinder body, flange, cylinder head and piston rod, the bottom end inside piston rod will seep out part of oil stain at this time, sealing sleeve is sealed to piston rod by compact mechanism at this time, so that piston rod and cylinder head are frequently moved, and then compact sealing sleeve regularly, to improve sealing effect of sealing sleeve and piston rod.

Description

Technical Field

[0001] This utility model relates to the field of hydraulic pumping unit technology, and in particular to a hydraulic pumping unit cylinder sealing device. Background Technology

[0002] Hydraulic pumping units are widely used in the oil extraction field due to their high efficiency and energy saving. As the core component of a hydraulic pumping unit, the sealing performance of the hydraulic cylinder directly affects the normal operation and efficiency of the unit.

[0003] When using the above-mentioned technology, the following technical problems were found in the existing technology: The sealing device of the existing hydraulic pumping unit cylinder usually sets a simple seal between the cylinder body, cylinder head and piston rod to achieve the sealing effect. In actual operation, the cylinder head and piston rod need to perform frequent relative movements, which will cause the seal to be constantly subjected to friction and compression, and is prone to wear and aging. With the increase of use time, the sealing performance gradually decreases, and oil stains will seep out from the cylinder head along the piston rod, which not only wastes oil, but also pollutes the working environment. At the same time, it may affect the normal operation of the cylinder, and even cause equipment failure, increasing maintenance costs and downtime. To this end, we designed a hydraulic pumping unit cylinder sealing device to provide another technical solution to the above-mentioned technical problems. Summary of the Invention

[0004] The purpose of this invention is to provide a sealing device for a hydraulic pumping unit cylinder to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, the present invention adopts the following technical solution: A hydraulic pumping unit cylinder sealing device includes a cylinder body, a flange mounted at the bottom end of the cylinder body, a cylinder head mounted below the flange, a piston rod mounted inside the cylinder body and the cylinder head, and a sealing mechanism for sealing the piston rod provided at the bottom end inside the cylinder head. The sealing mechanism includes a sealing sleeve, a pressure ring, and a threaded sleeve. The sealing sleeve is mounted at the bottom end inside the cylinder head, and the bottom end of the inner side of the sealing sleeve is in contact with the piston rod. The pressure ring is slidably connected to the outer side of the sealing sleeve, and a threaded sleeve is threadedly connected to the bottom end of the outer side of the cylinder head. The top end of the inner side of the threaded sleeve contacts the pressure ring.

[0006] The cylinder head has guide rails at both ends inside, a guide rod is fixed to the inner side of the guide rail, and the outer side of the guide rod is slidably connected to the pressure ring.

[0007] The top of the sealing sleeve is fixed to the cylinder head, and a sealing ring is fitted to the bottom of the inner side of the sealing sleeve. The inner side of the sealing ring is in contact with the piston rod.

[0008] The cylinder body and the flange are provided with a connecting mechanism, which includes bolts, ring gaskets and sealing gaskets. Several ring gaskets are fixed at the bottom of the cylinder body, and several sealing grooves are opened at the top of the flange. The bottom of the ring gaskets is slidably connected to the sealing grooves.

[0009] The cylinder body has four ends at the bottom connected to the flange threaded by bolts. The cylinder body and the flange are both fixed with sealing rings at their inner sides and close to each other. The inner side of the sealing ring is in contact with the piston rod.

[0010] In this configuration, a sealing gasket is fixed to the end of the cylinder body and the flange that are close to each other.

[0011] It is clear without a doubt that the technical solution described above in this application can solve the technical problem that this application aims to address.

[0012] Compared with the prior art, the beneficial effects of this utility model are: through the cooperation of components such as the threaded sleeve and the pressure ring, the sealing sleeve can be tightened periodically by the tightening mechanism, which significantly improves the sealing effect between the sealing sleeve and the piston rod and effectively prevents oil stains from seeping out when the piston rod and cylinder head move frequently.

[0013] Through the connection mechanism, the snap-fit ​​between the ring gasket and the sealing groove, the setting of the sealing gasket, and the fit between the sealing ring and the piston rod, multiple safeguards are provided to prevent oil stains from seeping between the cylinder body and the flange and on the inner side, greatly enhancing the overall sealing performance between the cylinder body and the cylinder head. Attached Figure Description

[0014] To more clearly illustrate the technical solutions of the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model; Figure 2 This is a schematic diagram of the structure between the cylinder block and the cylinder head of this utility model; Figure 3 This is a schematic diagram of the structure between the cylinder head and the threaded sleeve of this utility model; Figure 4 This is a schematic diagram of the structure between the sealing sleeve and the threaded sleeve of this utility model.

[0016] In the diagram: 1. Cylinder body; 2. Flange; 3. Cylinder head; 4. Piston rod; 5. Sealing ring; 6. Bolt; 7. Threaded sleeve; 8. Sealing groove; 9. Ring gasket; 10. Sealing gasket; 11. Sealing sleeve; 12. Pressure ring; 13. Guide rail; 14. Guide rod. Detailed Implementation

[0017] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present utility model. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments.

[0018] Please see Figure 1-4 This utility model provides a technical solution: a hydraulic pumping unit cylinder sealing device, including a cylinder body 1, a flange 2 mounted at the bottom end of the cylinder body 1, a cylinder head 3 mounted below the flange 2, a piston rod 4 mounted inside the cylinder body 1 and the cylinder head 3, and a sealing mechanism for sealing the piston rod 4 provided at the bottom end inside the cylinder head 3, the sealing mechanism including a sealing sleeve 11, a pressure ring 12 and a threaded sleeve 7, the sealing sleeve 11 is mounted at the bottom end inside the cylinder head 3, the bottom end inside the sealing sleeve 11 is in contact with the piston rod 4, the pressure ring 12 is slidably connected to the outside of the sealing sleeve 11, and the threaded sleeve 7 is threadedly connected to the bottom end outside the cylinder head 3, the top end inside the threaded sleeve 7 is in contact with the pressure ring 12.

[0019] During use, the cylinder body 1, flange 2, cylinder head 3 and piston rod 4 are assembled and spliced ​​together. At this time, some oil stains will seep out from the bottom of the inner side of the piston rod 4. At this time, the sealing sleeve 11 is driven by the tightening mechanism to seal the piston rod 4. As the piston rod 4 and cylinder head 3 move frequently, the sealing sleeve 11 is tightened periodically to improve the sealing effect between the sealing sleeve 11 and the piston rod 4.

[0020] The cylinder head 3 has guide rails 13 at both ends inside, and guide rods 14 are fixed on the inner side of the guide rails 13. The outer side of the guide rods 14 is slidably connected to the pressure ring 12.

[0021] The top of the sealing sleeve 11 is fixed to the cylinder head 3, and a sealing ring is fitted at the bottom of the inner side of the sealing sleeve 11. The inner side of the sealing ring is in contact with the piston rod 4.

[0022] Specifically, when it is necessary to tighten the sealing sleeve 11 to prevent oil stains from seeping out of the cylinder head 3, the threaded sleeve 7 is rotated and moved downwards. The threaded sleeve 7 drives the pressure ring 12 to apply pressure to the sealing sleeve 11 along the guide rod 14. At this time, the bottom end of the sealing sleeve 11 rolls up the piston rod 4, so that the sealing sleeve 11 drives the sealing ring to further seal the piston rod 4.

[0023] A connection mechanism is provided between the cylinder body 1 and the flange 2. The connection mechanism includes bolts 6, ring gaskets 9 and sealing gaskets 10. Several ring gaskets 9 are fixed at the bottom of the cylinder body 1, and several sealing grooves 8 are opened at the top of the flange 2. The bottom of the ring gaskets 9 is slidably connected to the sealing grooves 8.

[0024] The four ends of the bottom of the cylinder body 1 are threadedly connected to the flange 2 by bolts 6. A sealing ring 5 is fixed on the inner side of the cylinder body 1 and the flange 2 at the end that is close to each other. The inner side of the sealing ring 5 is in contact with the piston rod 4. A sealing gasket 10 is fixed on the inner side of the cylinder body 1 and the flange 2 at the end that is close to each other.

[0025] Furthermore, the cylinder body 1 is connected to the sealing groove 8 on the flange 2 by bolt 6, thereby effectively sealing the connection between the cylinder body 1 and the flange 2. The connection between the ring gasket 9 and the sealing groove 8 effectively prevents oil stains from seeping out from the inside of the cylinder body 1 and the cylinder head 3, and increases the sealing effect between the cylinder body 1 and the cylinder head 3.

[0026] At this point, the sealing ring 5 further enhances the sealing effect between the cylinder block 1, cylinder head 3, and piston rod 4.

[0027] The usage process of the hydraulic pumping unit cylinder sealing device provided by this utility model is as follows: After the device is assembled, when oil seeps out from the bottom inner side of the piston rod 4, the threaded sleeve 7 is rotated to move it downwards. The threaded sleeve 7 will drive the pressure ring 12 to slide along the guide rod 14 within the guide rail 13, applying pressure to the sealing sleeve 11. Since the top of the sealing sleeve 11 is fixed to the cylinder head 3, the sealing ring fitted at its bottom inner side will further conform to the piston rod 4 under pressure, achieving effective sealing of the piston rod 4. The sealing effect can be maintained by periodically operating this mechanism.

[0028] Then, the cylinder body 1 and flange 2 are connected by bolts 6. The ring gasket 9 at the bottom of the cylinder body 1 will slide and seal with the sealing groove 8 at the top of the flange 2. At the same time, the sealing rings 5 ​​on the inner sides of the cylinder body 1 and flange 2, which are close to each other, are in contact with the piston rod 4, and the sealing gaskets 10 on the inner sides of the two are also in close contact, thus completing the sealed splicing between the cylinder body 1 and flange 2.

[0029] Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

Claims

1. A sealing device for a hydraulic pumping unit cylinder, characterized in that, The cylinder includes a cylinder body (1), a flange (2) is mounted at the bottom of the cylinder body (1), a cylinder head (3) is mounted below the flange (2), a piston rod (4) is mounted on the inner side of the cylinder body (1) and the cylinder head (3), and a sealing mechanism for sealing the piston rod (4) is provided at the bottom inside the cylinder head (3). The sealing mechanism includes a sealing sleeve (11), a pressure ring (12) and a threaded sleeve (7). The sealing sleeve (11) is mounted at the bottom inside the cylinder head (3), and the bottom inside the sealing sleeve (11) is in contact with the piston rod (4). The pressure ring (12) is slidably connected to the outer side of the sealing sleeve (11), and the threaded sleeve (7) is threadedly connected to the bottom outside the cylinder head (3). The top end of the threaded sleeve (7) is in contact with the pressure ring (12).

2. The hydraulic pumping unit cylinder sealing device according to claim 1, characterized in that, The cylinder head (3) has guide rails (13) at both ends inside. A guide rod (14) is fixed on the inner side of the guide rail (13), and the outer side of the guide rod (14) is slidably connected to the pressure ring (12).

3. The hydraulic pumping unit cylinder sealing device according to claim 2, characterized in that, The top of the sealing sleeve (11) is fixed to the cylinder head (3), and a sealing ring is fitted at the bottom of the inner side of the sealing sleeve (11). The inner side of the sealing ring is in contact with the piston rod (4).

4. A hydraulic pumping unit cylinder sealing device according to claim 2, characterized in that, A connection mechanism is provided between the cylinder body (1) and the flange (2). The connection mechanism includes bolts (6), ring gaskets (9) and sealing gaskets (10). Several ring gaskets (9) are fixed at the bottom of the cylinder body (1), and several sealing grooves (8) are opened at the top of the flange (2). The bottom of the ring gaskets (9) is slidably connected to the sealing grooves (8).

5. A hydraulic pumping unit cylinder sealing device according to claim 4, characterized in that, The four ends of the bottom of the cylinder (1) are threadedly connected to the flange (2) by bolts (6). The inner sides of the cylinder (1) and the flange (2) and the ends close to each other are fixed with sealing rings (5). The inner side of the sealing ring (5) is in contact with the piston rod (4).

6. A hydraulic pumping unit cylinder sealing device according to claim 5, characterized in that, Both the cylinder body (1) and the flange (2) are fixed with sealing gaskets (10) at their closest points.

Images