Polish rod sealer convenient for taking sealing element

Abstract

The utility model discloses a polish rod sealer convenient for taking a sealing element, which relates to the field of polish rod sealers, and comprises a shell, a universal shaft cavity, a universal shaft pressing cap and an O-shaped sealing ring, the shell and the universal shaft pressing cap are respectively and fixedly sleeved with a lower connecting ring and an upper connecting ring; the lower connecting ring and the upper connecting ring are provided with clamping hook mechanisms matched with each other respectively, the opposite clamping hook mechanisms are matched to enable the lower connecting ring and the upper connecting ring to be connected, connection of the universal shaft pressing cap and the shell is achieved, and each clamping hook mechanism comprises an outer shell, a firefield car coupler, an uncoupling rod and an elastic mechanism. Traditional threaded connection is replaced by the clamping hook mechanism, disassembly and assembly are more convenient and faster, meanwhile, the problem that connection reliability is affected by thread abrasion or thread slipping possibly caused by frequent disassembly and assembly is solved, disassembly and assembly efficiency can be remarkably improved, tool dependence is reduced, and cost is reduced. Therefore, the O-shaped sealing ring can be regularly checked and replaced frequently.

Description

Technical Field

[0001] The utility model relates to the field of polished rod sealers, in particular to a polished rod sealer with an easy-to-access seal. Background Art

[0002] The universal polarization rod sealer is a sealing device used in the wellhead of oil field pumping units. It is mainly used to solve the problem of sealing failure caused by deflection or vibration of the rod (sucker rod) during movement. Through the universal adjustment function, it can automatically adapt to the deflection angle of the rod to ensure the stability and reliability of the sealing performance.

[0003] In the existing universal polarizing rod sealer, Figure 1 As shown in the figure, the universal shaft cavity shown in the figure can be used to adjust the deflection of the hollow rod, which is connected to the housing through the universal shaft pressure cap and sealed by O-rings with specifications of 67*5.3 and 63*5.3 respectively. Due to the friction generated by the movement of the light rod, the erosion of the medium in the well, and the influence of high temperature and high pressure environment, the surface of the O-ring will age, deform, crack or reduce elasticity during long-term use, resulting in reduced sealing performance, leakage of the medium in the well, and increased risk of environmental pollution. Therefore, regular inspection and replacement are required.

[0004] In the existing design, the universal joint shaft pressure cap is connected to the housing through threads and is sealed with an O-ring. The threaded connection requires tools (such as a wrench) to operate during disassembly and assembly. The disassembly and assembly process is time-consuming and labor-intensive, and frequent disassembly and assembly may cause thread wear or stripping, affecting the reliability of the connection. Utility Model Content

[0005] The utility model aims to solve the problems existing in the prior art and provides a bare rod sealer with a seal that can be easily taken out.

[0006] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The light rod sealer for easy access to seals comprises a housing, a universal shaft cavity, a universal shaft pressure cap and an O-ring, wherein the universal shaft cavity and the O-ring are located inside the housing, the universal shaft pressure cap is sleeved outside the housing and limits the universal shaft cavity, a lower connecting ring and an upper connecting ring are fixedly sleeved on the housing and the universal shaft pressure cap respectively; mutually adapted hook mechanisms are respectively installed on the lower connecting ring and the upper connecting ring, and the relative hook mechanisms cooperate to connect the lower connecting ring and the upper connecting ring, thereby realizing the connection between the universal shaft pressure cap and the housing;

[0008] Among them, each of the hook mechanisms includes a shell, a Shibata coupler, an unhooking rod and an elastic mechanism, several of the shells are fixedly connected to the outer walls of the lower connecting ring and the upper connecting ring, the Shibata coupler is fixedly arranged in the shell, and the elastic mechanism is arranged between the unhooking rod and the shell.

[0009] Preferably, the Shibata coupler includes a hook head fixedly connected to a shell, a semicircular groove is provided in the hook head, a hook tongue is rotatably provided in the semicircular groove, a through groove is provided on the hook head, one end of the unhooking rod passes through the through groove and is connected to the hook tongue, the shape and size of the hook tongue are consistent with the semicircular groove, and the two are coaxially arranged.

[0010] Preferably, the end of the hook head is in the shape of a quadrangular pyramid.

[0011] Preferably, a limiting groove is provided on the shell, and when the unhooking rod contacts one end of the limiting groove, the hook tongue is in an inclined state, and when the unhooking rod contacts the other end of the limiting groove, the end face of the hook tongue and the side face of the hook head are in the same plane.

[0012] Preferably, arcuate grooves are provided on the inner top wall and the inner bottom wall of the through groove, a slide bar is slidably provided between the two arcuate grooves, the slide bar can pass through the unhooking rod, and the arcuate groove is coaxially arranged with the semicircular groove.

[0013] Preferably, the elastic mechanism includes a cylinder and a pull rod inserted at one end of the cylinder, the end of the pull rod is fixedly connected to a slide plate slidably arranged in the cylinder, and a compression spring sleeved on the outside of the pull rod is installed between the inner wall of the cylinder and the slide plate.

[0014] Preferably, one end of the pull rod away from the slide plate is fixedly connected to a baffle, and a tension spring sleeved on the outside of the pull rod is installed between the end of the cylinder and the baffle.

[0015] Preferably, an ear plate is fixedly connected to the outer wall of the shell, and the end of the cylinder and one side of the baffle are respectively fixedly connected with a connecting hook, and the cylinder and the baffle are respectively hinged to the ear plate and the unhooking rod through the connecting hook.

[0016] Compared with the prior art, the advantages and positive effects of the utility model are:

[0017] In the present application, a hook mechanism is used to replace the traditional threaded connection, making the disassembly and installation process more convenient and quick. Users can easily disassemble and assemble the seal without using complicated tools, reducing tool dependence and greatly improving work efficiency. At the same time, it eliminates the problem of thread wear or stripping caused by frequent disassembly and assembly, which may affect the reliability of the connection, so that the O-rings can be frequently inspected and replaced regularly, thereby facilitating the inspection and replacement of aged O-rings and ensuring the continuous sealing performance of the equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 A schematic diagram of the structure of an existing light rod sealer for easy access to seals;

[0019] Figure 2 This is a cross-sectional structural schematic diagram of a bare rod sealer for easy access to a seal provided in the utility model;

[0020] Figure 3 This is a schematic diagram of the layout structure of the light rod sealer for easy access to the seal provided by the utility model;

[0021] Figure 4 A schematic cross-sectional view of the docking structure of the hook mechanism of the light rod sealer for easy access to the seal provided in the utility model;

[0022] Figure 5 It is a partial cross-sectional structural schematic diagram of the elastic mechanism of the polished rod sealer of the utility model for easy access to the seal;

[0023] Figure 6 A schematic diagram of the locked state of two hook mechanisms of the light rod sealer for easy access to the seal provided by the utility model;

[0024] Figure 7 The utility model provides a schematic diagram of the unlocked state of two hook mechanisms of the bare rod sealer for easy access to the seal.

[0025] Legend: 1. Shell; 2. Universal joint cavity; 3. Universal joint pressure cap; 4. O-ring; 5. Lower connecting ring; 6. Upper connecting ring; 7. Hook mechanism; 71. Shell; 72. Shibata coupler; 721. Hook head; 722. Semicircular groove; 723. Hook tongue; 724. Through groove; 725. Arc groove; 726. Slide rod; 73. Unhooking rod; 74. Elastic mechanism; 741. Cylinder; 742. Pull rod; 743. Slide plate; 744. Compression spring; 745. Baffle; 746. Tension spring; 747. Ear plate; 748. Connecting hook; 75. Limiting groove. DETAILED DESCRIPTION

[0026] In order to more clearly understand the above-mentioned purpose, features and advantages of the utility model, the utility model is further described below in conjunction with the accompanying drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0027] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways than those described herein. Therefore, the present invention is not limited to the specific embodiments of the following disclosure.

[0028] like Figure 1-7As shown, the utility model provides a light rod sealer for easy access to seals, comprising a housing 1, a universal shaft cavity 2, a universal shaft pressure cap 3 and an O-ring 4, wherein the universal shaft cavity 2 and the O-ring 4 are located inside the housing 1, the universal shaft pressure cap 3 is sleeved on the outside of the housing 1 and limits the universal shaft cavity 2, a lower connecting ring 5 and an upper connecting ring 6 are fixedly sleeved on the housing 1 and the universal shaft pressure cap 3, respectively, and mutually adapted hook mechanisms 7 are respectively installed on the lower connecting ring 5 and the upper connecting ring 6, and the relative hook mechanisms 7 cooperate to connect the lower connecting ring 5 and the upper connecting ring 6, thereby realizing the connection between the universal shaft pressure cap 3 and the housing 1;

[0029] Among them, each hook mechanism 7 includes a shell 71, a Shibata coupler 72, an unhooking rod 73 and an elastic mechanism 74. Several shells 71 are fixedly connected to the outer walls of the lower connecting ring 5 and the upper connecting ring 6 respectively, the Shibata coupler 72 is fixedly arranged in the shell 71, and the elastic mechanism 74 is arranged between the unhooking rod 73 and the shell 71.

[0030] In this embodiment, the Shibata coupler 72 includes a hook head 721 fixedly connected to the outer shell 71, a semicircular groove 722 is provided in the hook head 721, a hook tongue 723 is rotatably arranged in the semicircular groove 722, a through groove 724 is provided on the hook head 721, one end of the unhooking rod 73 passes through the through groove 724 and is connected to the hook tongue 723, the shape and size of the hook tongue 723 are consistent with the semicircular groove 722, and the two are coaxially arranged.

[0031] In this embodiment, the end of the hook head 721 is in the shape of a quadrangular pyramid. When the two hook mechanisms 7 are butted against each other, the shape of the hook head 721 can facilitate the pushing of the hook tongue 723 .

[0032] In this embodiment, a limiting groove 75 is provided on the housing 71. When the unhooking rod 73 contacts one end of the limiting groove 75, the hook tongue 723 is in an inclined state. When the unhooking rod 73 contacts the other end of the limiting groove 75, the end face of the hook tongue 723 and the side face of the hook head 721 are in the same plane.

[0033] In this embodiment, arc grooves 725 are provided on the inner top wall and the inner bottom wall of the through groove 724, and a sliding rod 726 is slidably provided between the two arc grooves 725. The sliding rod 726 can pass through the unhooking rod 73. The arc groove 725 and the semicircular groove 722 are coaxially arranged. Since the sliding rod 726 slides in the arc groove 725, the unhooking rod 73 and the hook tongue 723 are limited, so that the unhooking rod 73 and the hook tongue 723 rotate about the axis of the semicircular groove 722.

[0034] In this embodiment, the elastic mechanism 74 includes a cylinder 741 and a pull rod 742 inserted into one end of the cylinder 741. The end of the pull rod 742 is fixedly connected to a slide plate 743 slidably arranged in the cylinder 741. A compression spring 744 is installed between the inner wall of the cylinder 741 and the slide plate 743 and is sleeved on the outside of the pull rod 742. When the pull rod 742 moves, the compression spring 744 will be subjected to axial pressure and compressed, thereby storing compression energy to facilitate the resetting of the unhooking rod 73.

[0035] In this embodiment, one end of the pull rod 742 away from the slide plate 743 is fixedly connected to the baffle 745, and a tension spring 746 is installed between the end of the cylinder 741 and the baffle 745 and is sleeved on the outside of the pull rod 742. When the pull rod 742 moves, the tension spring 746 will be subjected to axial tension and stretched, storing stretching energy to facilitate the reset of the unhooking rod 73.

[0036] In this embodiment, an ear plate 747 is fixedly connected to the outer wall of the shell 71, and a connecting hook 748 is fixedly connected to the end of the cylinder 741 and one side of the baffle 745 respectively. The cylinder 741 and the baffle 745 are respectively hinged to the ear plate 747 and the unhooking rod 73 through the connecting hook 748, thereby realizing the connection between the unhooking rod 73 and the shell 71, and allowing the elastic mechanism 74 to deflect with the movement of the unhooking rod 73.

[0037] How to use and working principle of this device:

[0038] When the device is in use, the universal shaft pressure cap 3 is sleeved on the outer side of the shell 1 and limits the universal shaft cavity 2. In this process, the hook mechanisms 7 on the lower connecting ring 5 and the upper connecting ring 6 are aligned. As the lower connecting ring 5 and the upper connecting ring 6 are connected, the hook head 721 is inserted into the corresponding shell 71. The hook head 721 presses the opposite hook tongue 723 in the process of moving forward to make the hook tongue 723 rotate. When the hook tongue 723 rotates, the unhooking rod 73 follows the deflection. The unhooking rod 73 moves the pull rod 742 through the connecting hook 748. During the movement of the pull rod 742, the compression spring 744 and the tension spring 746 are stressed until the connecting surfaces of the two opposite hook tongues 723 contact. The hook head 721 no longer presses the opposite hook tongue 723, and the compression spring 744 and the tension spring 746 are reset to reset the unhooking rod 73. The reset of the hook tongue 723 locks the two shells 71, and then the connection between the universal shaft pressure cap 3 and the shell 1 is realized by connecting the lower connecting ring 5 and the upper connecting ring 6.

[0039] When the O-ring 4 needs to be regularly inspected and replaced, it is only necessary to toggle the unhooking rod 73 and overcome the elastic mechanism 74. When the unhooking rod 73 contacts one end of the limiting groove 75, the end face of the hook tongue 723 and the side face of the hook head 721 are in the same plane, and the hook tongue 723 is no longer connected to the opposite hook head 721, so that unlocking is achieved, and the universal shaft pressure cap 3 and the housing 1 can be separated, and the O-ring 4 can be inspected and replaced.

[0040] In summary, the present application replaces the traditional threaded connection with a hook mechanism 7, which is more convenient and quick during disassembly and installation. It also eliminates the problem that frequent disassembly and assembly may cause thread wear or stripping and affect connection reliability. It can significantly improve disassembly and assembly efficiency and reduce tool dependence, so as to facilitate frequent regular inspection and replacement of the O-ring 4.

[0041] The above description is only a preferred embodiment of the present invention and does not limit the present invention in other forms. Any technician familiar with the profession may use the technical content disclosed above to change or modify it into an equivalent embodiment with equivalent changes and apply it to other fields. However, any simple modification, equivalent change and modification made to the above embodiment based on the technical essence of the present invention without departing from the content of the technical solution of the present invention still falls within the protection scope of the technical solution of the present invention.

Claims

1. A light rod sealer for easily removing a sealing member, comprising a housing (1), a universal shaft cavity (2), a universal shaft pressure cap (3) and an O-ring (4), wherein the universal shaft cavity (2) and the O-ring (4) are located inside the housing (1), and the universal shaft pressure cap (3) is sleeved on the outside of the housing (1) and limits the position of the universal shaft cavity (2), and is characterized in that: A lower connecting ring (5) and an upper connecting ring (6) are fixedly sleeved on the housing (1) and the universal shaft pressure cap (3), respectively; mutually adaptable hook mechanisms (7) are respectively installed on the lower connecting ring (5) and the upper connecting ring (6); the relative hook mechanisms (7) cooperate with each other to connect the lower connecting ring (5) and the upper connecting ring (6), thereby realizing the connection between the universal shaft pressure cap (3) and the housing (1); Each of the hook mechanisms (7) comprises a housing (71), a Shibata coupler (72), an unhooking rod (73) and an elastic mechanism (74); a plurality of the housings (71) are respectively fixedly connected to the outer walls of the lower connecting ring (5) and the upper connecting ring (6); the Shibata coupler (72) is fixedly arranged in the housing (71); and the elastic mechanism (74) is arranged between the unhooking rod (73) and the housing (71).

2. The light rod sealer for easy access to the seal according to claim 1, characterized in that: The Shibata coupler (72) comprises a hook head (721) fixedly connected to a housing (71), a semicircular groove (722) being provided in the hook head (721), a hook tongue (723) being rotatably provided in the semicircular groove (722), a through groove (724) being provided on the hook head (721), one end of the unhooking rod (73) passing through the through groove (724) and being connected to the hook tongue (723), the shape and size of the hook tongue (723) being consistent with the semicircular groove (722), and the two being coaxially arranged.

3. The light rod sealer for easy access to the seal according to claim 2, characterized in that: The end of the hook head (721) is in the shape of a quadrangular pyramid.

4. The light rod sealer for easy access to the seal according to claim 2, characterized in that: The housing (71) is provided with a limiting groove (75); when the unhooking rod (73) contacts one end of the limiting groove (75), the hook tongue (723) is in an inclined state; when the unhooking rod (73) contacts the other end of the limiting groove (75), the end surface of the hook tongue (723) and the side surface of the hook head (721) are in the same plane.

5. The light rod sealer for easy access to the seal according to claim 2, characterized in that: The inner top wall and the inner bottom wall of the through groove (724) are both provided with arc-shaped grooves (725), a slide bar (726) is slidably arranged between the two arc-shaped grooves (725), and the slide bar (726) can pass through the unhooking rod (73), and the arc-shaped groove (725) is coaxially arranged with the semicircular groove (722).

6. The light rod sealer for easy access to the seal according to claim 1, characterized in that: The elastic mechanism (74) comprises a cylinder (741) and a pull rod (742) inserted into one end of the cylinder (741); the end of the pull rod (742) is fixedly connected to a slide plate (743) slidably arranged in the cylinder (741); and a compression spring (744) sleeved on the outside of the pull rod (742) is installed between the inner wall of the cylinder (741) and the slide plate (743).

7. The light rod sealer for easy access to the seal according to claim 6, characterized in that: One end of the pull rod (742) away from the slide plate (743) is fixedly connected to a baffle (745), and a tension spring (746) sleeved on the outside of the pull rod (742) is installed between the end of the cylinder (741) and the baffle (745).

8. The light rod sealer for easy access to the seal according to claim 7, characterized in that: An ear plate (747) is fixedly connected to the outer wall of the housing (71), and a connecting hook (748) is fixedly connected to the end of the cylinder (741) and one side of the baffle (745), respectively. The cylinder (741) and the baffle (745) are hinged to the ear plate (747) and the unhooking rod (73) via the connecting hook (748).

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