A large swivel seal cover plate guide rod fixing device

Abstract

This utility model relates to the field of petrochemical train tank car loading technology, specifically to a fixing device for the guide rod of a sealing cover plate of a large loading arm. This utility model adopts a double-layer adjustable frame structure, consisting of a support component, a guide component, and a self-aligning component. The self-aligning component is mounted on the support component, and the guide component is mounted on the self-aligning component. The self-aligning component laterally controls the displacement of the guide rod to achieve eccentric adjustment compensation. The guide component provides axial guidance and support for the cover plate guide rod, enhancing the axial stability of the cover plate guide rod and ensuring smooth and precise centering and lifting of the sealing cover plate. This utility model uses universal connection dimensions, does not affect the existing structure of the large loading arm, is easy to install, effectively prevents bending deformation of the guide rod, reduces wear, improves structural strength and stability, and extends service life.

Description

Technical Field

[0001] This utility model relates to the field of petrochemical train tank car loading technology, specifically to a guide rod fixing device for a large loading arm sealing cover plate. Background Technology

[0002] In the oil and chemical industry's tanker loading systems, the large loading arm (or similar overhead crane) plays a crucial role as a highly efficient piece of equipment for loading oil products, due to its rapid loading speed and superior efficiency. As a vital loading and unloading device, the stable operation of its sealing cover assembly is paramount. To achieve tank opening sealing, the large loading arm's lifting pipe is fitted with a sliding sealing cover assembly, enabling vertical lifting and lowering to cover the tank opening. Since the sliding distance during operation is close to 2 meters, and the cover assembly's structure prevents significant rotation (otherwise, it would interfere with surrounding structural components), large loading arms are standardly equipped with a guide rod to prevent the sealing cover assembly from rotating. Traditional guide rods, due to their single-point limiting structure (refer to the drawings) and their thinness, suffer from poor overall rigidity. When the sealing cover assembly descends, the guide rod is easily bent and deformed, causing jamming, frequent repairs, and significantly increased maintenance costs.

[0003] The sealing cover assembly of the large loading arm is quite unique, and the structural form may vary between different manufacturers, leading to positioning deviations at the connection between the guide rod and the sealing cover assembly. For production and environmental protection purposes, it is sometimes necessary to replace the sealing cover assembly with one from a different manufacturer on-site. This can easily result in large offsets in the mounting holes, making it impossible to install the old guide rod or causing uneven stress. Ultimately, this is because the traditional guide rod structure lacks an eccentricity adjustment function.

[0004] Traditional guide rod fixing devices suffer from numerous problems, such as incompatible connection sizes that cannot be directly matched with the standard oil inlet connector of the large loading arm tee assembly. This often necessitates hot work modifications to the existing structure of the large loading arm, increasing installation costs and difficulty, and posing safety hazards. Furthermore, existing fixing clamp structures lack sufficient strength and have poor guiding performance, failing to meet the high-precision guiding requirements of the large loading arm sealing cover during frequent use. Additionally, due to installation errors and other factors, the sealing cover assembly is prone to eccentricity during operation, affecting the sealing effect and leading to material leakage. Therefore, a fixing device that can solve these problems is urgently needed. Utility Model Content

[0005] This utility model aims to provide a guide rod fixing device for the sealing cover plate of a large loading arm, to solve the problems of poor guide rod rigidity, easy deformation and jamming, high maintenance costs, and installation difficulties caused by the lack of eccentric adjustment function in the existing technology. By improving the guide rod fixing structure, the stability and reliability of the sealing cover plate assembly of the large loading arm are improved, maintenance costs are reduced, and compatibility with sealing cover plate assemblies from different manufacturers is enhanced.

[0006] To achieve the above objectives, the technical solution adopted by this utility model is: a guide rod fixing device for a large loading arm sealing cover plate. The guide rod fixing device adopts a double-layer adjustable frame structure, consisting of a support component, a guide component, and a self-aligning component. The self-aligning component is mounted on the support component, and the guide component is mounted on the self-aligning component. The self-aligning component laterally controls the displacement of the guide rod to achieve eccentric adjustment compensation. The guide component provides axial guidance and support for the cover plate guide rod, enhancing the axial stability of the cover plate guide rod and ensuring that the sealing cover plate is smoothly and accurately aligned and raised.

[0007] The support assembly includes connecting plates and fixing plates. There are two fixing plates arranged in parallel left and right. There are four connecting plates arranged in parallel upper and lower layers. One end of each of the two connecting plates in each layer is vertically connected to the left and right fixing plates, and the other end is a free end. There are two sets of self-aligning components. The two ends of each set of self-aligning components are movably connected to the free ends of each connecting plate.

[0008] The fixing plate is an integral strip-shaped metal plate composed of a rectangular base at the bottom and an upwardly inclined connecting structure; the connecting structure includes a first trapezoid, a second trapezoid, and a rectangular slot connecting plate in sequence; the width of the base of the first trapezoid is the same as the width of the rectangular base; the width of the top of the first trapezoid is the same as the width of the base of the second trapezoid, and the width of the top of the second trapezoid is the same as the width of the rectangular slot connecting plate; the upper end of the rectangular slot connecting plate has an open slot opening downwards, and multiple connecting holes are arranged around the slot for connecting with the large loading arm.

[0009] The rectangular base has two parallel slots at its upper and lower ends, which are parallel to the width direction of the rectangular base. One end of the connecting plate is embedded in the slot.

[0010] The connecting plate consists of four rectangular metal plates. Each connecting plate has two parallel first strip-shaped adjustment holes along its length at its free end. The self-aligning assembly is connected to the first strip-shaped adjustment holes via adjusting bolts.

[0011] The self-aligning assembly consists of two rectangular self-aligning movable plates. Each self-aligning movable plate has four parallel second strip-shaped adjustment holes at both ends along its length. The second strip-shaped adjustment holes are matched and assembled with the first strip-shaped adjustment holes on both sides of the connecting plate by adjusting bolts to adjust the horizontal position of the self-aligning movable plate.

[0012] The adjusting bolt is equipped with a lock nut to tighten the bolt and prevent it from slipping.

[0013] Each self-aligning movable plate has a guide hole in the middle, and the diameter of the guide hole is adapted to the guide rod of the cover plate; four first connecting holes are evenly distributed around the guide hole, and the guide assembly is coaxially connected to the self-aligning movable plate through the first connecting holes.

[0014] The guide assembly includes two sets of guide sleeves. Each guide sleeve is a ring with a central opening, the diameter of which is the same as the diameter of the guide hole of the self-aligning movable plate. The guide sleeve is provided with four second connecting holes that are adapted to the first connecting hole of the self-aligning movable plate. The guide sleeve and the self-aligning movable plate are bolted together through the first connecting hole and the second connecting hole.

[0015] The guide sleeve is made of copper alloy. The inner wall of the guide sleeve and the contact surface with the guide rod are provided with a wear-resistant coating. The wear-resistant coating is a tungsten carbide coating with a thickness of 3-5 mm to reduce the friction between the guide rod and the guide sleeve.

[0016] Beneficial effects: 1. This utility model is easy to install: the guide rod fixing device adopts a universal connection size, which does not affect the existing structure of the large loading arm, and can be directly matched and installed with the standard oil inlet connecting block of the large loading arm tee assembly. No hot work modification is required, and the installation is simple and quick.

[0017] 2. The upper and lower self-aligning movable plates 3 used in this utility model can adjust and compensate for the eccentricity of the device. This solves the installation difficulties caused by positioning deviations in traditional guide rods and enhances the compatibility with sealing cover plate assemblies from different manufacturers.

[0018] 3. This utility model adopts a double-layer guide sleeve and double-support structure, combined with a thickened guide rod, which effectively prevents the guide rod from bending and deforming, reduces wear, improves structural strength and stability, and extends service life.

[0019] The above description is only an overview of the technical solution of this utility model. In order to better understand the technical means of this utility model and to implement it in accordance with the contents of the specification, the preferred embodiments of this utility model are described in detail below with reference to the accompanying drawings. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the assembly of this utility model; Figure 2 This is a schematic diagram of the fixing plate of this utility model; Figure 3 This is a schematic diagram showing the connection between the fixing plate and the connecting plate of this utility model; Figure 4 This is a schematic diagram of the guide sleeve of this utility model.

[0022] In the diagram: 1. Connecting plate; 2. Fixing plate; 2-1. Rectangular base; 2-2. First trapezoid; 2-3. Second trapezoid; 2-4. Rectangular slotted connecting plate; 3. Self-aligning movable plate; 4. Guide sleeve; 5. Guide hole. Detailed Implementation

[0023] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0024] Example: according to Figures 1-4 The diagram illustrates a guide rod fixing device for a large loading arm sealing cover. The device employs a double-layer adjustable frame structure, comprising a support assembly, a guide assembly, and a self-aligning assembly. The self-aligning assembly is mounted on the support assembly, and the guide assembly is mounted on the self-aligning assembly. The self-aligning assembly laterally controls the displacement of the guide rod to achieve eccentricity adjustment compensation. The guide assembly provides axial guidance and support for the cover plate guide rod, enhancing its axial stability and ensuring smooth and precise centering and lifting of the sealing cover.

[0025] Furthermore, the support assembly includes a connecting plate 1 and a fixing plate 2. Each fixing plate 2 is made of high-quality steel and its surface is treated with rust prevention to ensure that it will not rust during long-term use. The connecting plate 1 is made of high-strength alloy material to ensure sufficient strength and toughness. There are two fixing plates 2 arranged in parallel left and right. There are four connecting plates 1 arranged in parallel upper and lower layers. One end of each of the two connecting plates 1 in each layer is vertically connected to the left and right fixing plates 2, and the other end is a free end. There are two sets of self-aligning components. The two ends of each set of self-aligning components are movably connected to the free ends of each layer of connecting plates 1.

[0026] Furthermore, such as Figure 2 As shown, the fixing plate 2 is an integral strip-shaped metal plate composed of a rectangular base 2-1 at the bottom and an upwardly inclined connecting structure. The connecting structure sequentially includes a first trapezoid 2-2, a second trapezoid 2-3, and a rectangular slotted connecting plate 2-4. The base width of the first trapezoid 2-2 is the same as the width of the rectangular base 2-1, providing a stable foundation support. The top width of the first trapezoid 2-2 is the same as the base width of the second trapezoid 2-3, forming a smooth transition. The top width of the second trapezoid 2-3 is the same as the width of the rectangular slotted connecting plate 2-4, ensuring the continuity and stability of the structure. The rectangular slotted connecting plate 2-4 has an open slot at the top, with multiple connecting holes arranged around the slot. These connecting holes are precision-machined, with smooth, burr-free surfaces, ensuring a firm and reliable connection with the loading arm. The entire fixing plate is made of high-strength alloy material, possessing excellent tensile strength and durability, capable of withstanding extreme temperatures and corrosive environments, and suitable for various harsh working environments. It is used for connecting loading arms, ensuring safe and efficient operation.

[0027] Furthermore, the rectangular base 2-1 has two parallel slots at its upper and lower ends. These slots are smooth and uniform, and are completely parallel to the width direction of the rectangular base 2-1. The depth and width of each slot are precisely measured to ensure that the connecting plate 1 can be securely accommodated. One end of the connecting plate 1 is precision machined to ensure that it fits perfectly and is tightly embedded in the slot, thereby achieving a stable connection.

[0028] Furthermore, such as Figure 1 and Figure 3 As shown, the connecting plate 1 consists of four rectangular metal plates. The free end of the connecting plate 1 has two parallel first strip-shaped adjustment holes along its length. These two adjustment holes are rectangular with smooth edges, facilitating the smooth insertion and rotation of the adjustment bolts. The self-aligning assembly is precisely connected to the first strip-shaped adjustment holes through the adjustment bolts, forming a stable frame. This design allows for precise position control during adjustment, thereby ensuring the alignment accuracy and operational stability of the entire device and maintaining optimal alignment under different working conditions.

[0029] Furthermore, such as Figure 1 As shown, the self-aligning assembly includes two rectangular self-aligning movable plates 3. These plates are made of high-strength alloy material and their surfaces are precision-machined to ensure smoothness and wear resistance. Each self-aligning movable plate 3 has four parallel second strip-shaped adjustment holes at both ends along its length. These holes are evenly distributed, ensuring the symmetry and stability of the structure and guaranteeing the stability and flexibility of the self-aligning movable plate 3 in the horizontal direction. The second strip-shaped adjustment holes on the self-aligning movable plate 3 are matched and assembled with the first strip-shaped adjustment holes on the connecting plates 1 on both sides using adjusting bolts. This adjusts the horizontal position of the self-aligning movable plate 3, flexibly controlling its lateral displacement, thereby achieving precise control of the overall mechanical system. The first and second strip-shaped adjustment holes provide a certain positional margin for the device. When the adjusting bolts are tightened, the alignment of the self-aligning movable plate 3 can be precisely controlled, thus ensuring the balance and accuracy of the entire self-aligning assembly.

[0030] The adjusting bolt is equipped with a lock nut made of high-strength alloy material, which has excellent corrosion resistance and wear resistance. When tightening the bolt, rotating the lock nut can ensure that the bolt remains stable in various harsh environments and prevent slippage. In addition, the surface of the lock nut has been specially treated, making it smooth to the touch and easy to operate, further improving the convenience and safety of use.

[0031] like Figure 1 As shown, each self-aligning movable plate 3 has a guide hole 5 in the middle. The inner wall of the guide hole 5 is smooth to reduce the resistance when the guide rod moves. The diameter of the guide hole 5 is adapted to the guide rod of the cover plate. Four first connecting holes are evenly distributed around the guide hole 5. These connecting holes are symmetrically arranged to ensure that the guide assembly can be stably connected to the self-aligning movable plate 3 through the first connecting holes. The edges of each first connecting hole are smooth to facilitate the smooth installation and disassembly of the guide assembly. The guide assembly is coaxially set at the guide hole 5. The guide assembly is made of wear-resistant material to ensure that it will not wear out after long-term use. The self-aligning assembly controls the displacement of the guide rod laterally to achieve eccentric adjustment compensation, ensure precise lateral adjustment function, and improve the flexibility and adaptability of the system. The guide assembly supports the guide rod longitudinally, enhances the axial stability of the guide rod, effectively prevents tilting and sliding, and ensures reliable operation of the system under various working conditions.

[0032] Furthermore, such as Figure 1 and Figure 4As shown, the guide assembly includes two sets of circular guide sleeves 4. The guide sleeves 4 are made of high-strength alloy material and their surfaces are precision machined to ensure a smooth, burr-free surface. The guide sleeves 4 have a centrally located opening with a diameter matching that of the guide hole 5 of the self-aligning movable plate 3. The guide sleeves 4 are provided with four second connecting holes that are adapted to the first connecting hole of the self-aligning movable plate 3. These second connecting holes are precisely drilled and tapped to ensure a perfect fit with the bolts. The guide sleeves 4 and the self-aligning movable plate 3 are bolted together through the first and second connecting holes. The guide sleeves 4 and the self-aligning movable plate 3 are securely connected by high-precision bolts with anti-rust coatings on the bolt heads to ensure stability and reliability during long-term use.

[0033] The guide sleeve 4 is made of copper alloy. Copper alloy has excellent wear resistance, which can effectively resist wear and extend its service life during long-term reciprocating motion guidance. Its self-lubricating properties can reduce frictional resistance between the guide sleeve and moving parts, reduce power loss, and avoid maintenance costs and pollution risks caused by additional lubrication. In addition, its good explosion-proof performance makes it suitable for working environments with flammable and explosive risks (such as scenarios involving oil, gas, chemical raw materials, etc.), improving the safety of equipment operation.

[0034] The inner wall of the guide sleeve 4 is provided with a wear-resistant coating on the contact surface with the guide rod to reduce the friction between the guide rod and the guide sleeve 4.

[0035] The wear-resistant coating uses tungsten carbide, which possesses extremely high hardness and wear resistance, maintaining a smooth surface during prolonged use and effectively reducing wear caused by friction, thereby extending the equipment's service life. Furthermore, this coating exhibits excellent corrosion resistance, enabling stable operation in various harsh environments and ensuring the efficient operation of the guiding system. The wear-resistant coating uses high-quality tungsten carbide, a material renowned for its superior hardness and wear resistance. The thickness of the wear-resistant layer is precisely controlled between 3 and 5 mm, ensuring durable performance in high-wear environments. The smooth surface of the tungsten carbide coating provides extremely high corrosion resistance, remaining stable in extreme temperature and chemical environments. Its unique microstructure allows the coating to effectively disperse frictional forces, further extending the equipment's service life.

[0036] Furthermore, the installation method of the guide rod fixing device includes the following steps: the guide rod fixing device is matched and installed with the standard oil inlet of the large loading arm tee assembly using universal connection dimensions; according to the actual installation position of the sealing cover assembly, the upper and lower self-aligning movable plates are adjusted to achieve eccentricity adjustment compensation, ensuring that the guide rod and the sealing cover assembly are correctly connected. One end of the guide rod is connected to the sealing cover assembly. Throughout the entire loading arm system, the guide rod provides a guiding path for the movement or opening and closing of the sealing cover assembly. Through its cooperation with the guide rod fixing device and the self-aligning movable plate, it ensures that the sealing cover assembly can move along a precise trajectory during operation, avoiding problems such as poor sealing and material leakage caused by eccentricity or guiding deviation.

[0037] Furthermore, the working principle of the guide rod fixing device is as follows: when the guide rod is inserted into the detachable guide sleeve 4, the copper alloy guide sleeve 4 uses its wear-resistant and self-lubricating properties to guide the guide rod to move precisely along the preset trajectory; during the movement, the double-layer structure frame bears and disperses the force generated by the movement, ensuring the overall stability of the device; if it is necessary to adjust the relative position of the device and the external equipment, the position of the self-aligning movable plate 3 can be moved by using the first and second strip-shaped adjustment holes to achieve quick and accurate position adaptation, ensuring the continuous and stable operation of the guiding function.

[0038] Performance Results: Practical application has verified that this novel guide rod fixing device effectively solves the problems of traditional guide rods, such as easy deformation and jamming, high maintenance costs, and lack of eccentricity adjustment. It improves the stability and reliability of the large loading arm sealing cover assembly, reduces maintenance costs, and has been successfully applied to the loading systems of train tank cars in multiple petroleum and chemical enterprises.

[0039] Where there is no conflict, those skilled in the art can combine the relevant technical features in the above examples according to the actual situation to achieve the corresponding technical effects. Specific details of the various combinations will not be elaborated here.

[0040] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0041] Furthermore, the use of terms such as "first" and "second" in this utility model is for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0042] The above description is merely a preferred embodiment of the present invention. The present invention is not limited to the embodiments shown herein, but is to be accorded the widest scope consistent with the principles and novel features disclosed herein. Any simple modifications, equivalent variations, and alterations made to the above embodiments based on the technical essence of the present invention shall still fall within the scope of the present invention.

Claims

1. A guide rod fixing device for a sealing cover plate of a large loading arm, characterized in that: The guide rod fixing device adopts a double-layer adjustable frame structure, consisting of a support component, a guide component, and a self-aligning component. The self-aligning component is mounted on the support component, and the guide component is mounted on the self-aligning component. The self-aligning component laterally controls the displacement of the guide rod to achieve eccentric adjustment compensation. The guide component provides axial guidance and support for the cover plate guide rod, enhancing the axial stability of the cover plate guide rod and ensuring that the sealing cover plate is smoothly and accurately aligned and raised.

2. The guide rod fixing device for the sealing cover plate of a large loading arm as described in claim 1, characterized in that: The support assembly includes a connecting plate (1) and a fixing plate (2). There are two fixing plates (2) arranged in parallel left and right. There are four connecting plates (1) arranged in parallel upper and lower layers. One end of each of the two connecting plates (1) in each layer is vertically connected to the fixing plates (2) on the left and right sides, and the other end is a free end. There are two sets of self-aligning components. The two ends of each set of self-aligning components are movably connected to the free ends of each connecting plate (1).

3. The guide rod fixing device for the sealing cover plate of a large loading arm as described in claim 2, characterized in that: The fixing plate (2) is an integral strip-shaped metal plate composed of a rectangular base (2-1) at the bottom and an upwardly inclined connecting structure; the connecting structure includes a first trapezoid (2-2), a second trapezoid (2-3), and a rectangular slot connecting plate (2-4) in sequence; the width of the bottom side of the first trapezoid (2-2) is the same as the width of the rectangular base (2-1); the width of the top side of the first trapezoid (2-2) is the same as the width of the bottom side of the second trapezoid (2-3), and the width of the top side of the second trapezoid (2-3) is the same as the width of the rectangular slot connecting plate (2-4); the upper end of the rectangular slot connecting plate (2-4) is provided with an open slot, and multiple connecting holes are arranged around the slot for connecting with the large loading arm.

4. The guide rod fixing device for the sealing cover plate of a large loading arm as described in claim 3, characterized in that: The rectangular base (2-1) has two parallel slots at its upper and lower ends. The slots are parallel to the width direction of the rectangular base (2-1), and one end of the connecting plate (1) is embedded in the slot.

5. The guide rod fixing device for the sealing cover plate of a large loading arm as described in claim 2, characterized in that: The connecting plate (1) consists of four rectangular metal plates. Each connecting plate (1) has two parallel first strip-shaped adjustment holes along its length. The self-aligning assembly is connected to the first strip-shaped adjustment holes by adjusting bolts.

6. The guide rod fixing device for the sealing cover plate of a large loading arm as described in claim 5, characterized in that: The self-aligning assembly consists of two rectangular self-aligning movable plates (3). Each self-aligning movable plate (3) has four parallel second strip-shaped adjustment holes at both ends along its length. The second strip-shaped adjustment holes are matched and assembled with the first strip-shaped adjustment holes on both sides of the connecting plate (1) by adjusting bolts to adjust the position of the self-aligning movable plate (3) in the horizontal direction.

7. The guide rod fixing device for the sealing cover plate of a large loading arm as described in claim 6, characterized in that: The adjusting bolt is equipped with a lock nut to tighten the bolt and prevent it from slipping.

8. The guide rod fixing device for the sealing cover plate of a large loading arm as described in claim 6, characterized in that: Each self-aligning movable plate (3) has a guide hole (5) in the middle position. The diameter of the guide hole (5) is adapted to the guide rod of the cover plate. Four first connecting holes are evenly distributed around the guide hole (5). The guide assembly is coaxially connected to the self-aligning movable plate (3) through the first connecting holes.

9. The guide rod fixing device for the sealing cover plate of a large loading arm as described in claim 8, characterized in that: The guide assembly includes two sets of guide sleeves (4). The guide sleeve (4) is a ring with a central opening. The diameter of the opening is the same as the diameter of the guide hole (5) of the self-aligning movable plate (3). The guide sleeve (4) is provided with four second connecting holes that are adapted to the first connecting hole of the self-aligning movable plate (3). The guide sleeve (4) and the self-aligning movable plate (3) are bolted together through the first connecting hole and the second connecting hole.

10. The guide rod fixing device for the sealing cover plate of a large loading arm as described in claim 9, characterized in that: The guide sleeve (4) is made of copper alloy. The inner wall of the guide sleeve (4) and the contact surface with the guide rod are provided with a wear-resistant coating. The wear-resistant coating is a tungsten carbide coating with a thickness of 3-5 mm to reduce the friction between the guide rod and the guide sleeve (4).

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