Hose with rigid connection

Abstract

The present application relates to the technical field of the crane pipe, disclose the crane pipe using hard connecting pipe, including frame body and the liquid inlet pipe of longitudinal rotation arrangement connected on the frame body, the hard connecting pipe of length telescopic is connected on the liquid inlet pipe, the hard connecting pipe is communicated with the liquid inlet, the upper end of the downpipe is connected with the hard connecting pipe, and it is communicated with the hard connecting pipe, the frame body is equipped with the mounting arm of longitudinal arrangement, the mounting arm has the mounting section of opposite arrangement with the liquid inlet pipe, the elastic layer is sleeved on the mounting section, the elastic layer extends along the axial direction of the mounting section and is arranged towards the liquid inlet pipe, the frame body is communicated with the downpipe through the hard connecting pipe, and the length telescopic of the hard connecting pipe solves the problem that the liquid inlet pipe is separated or unstable when conveying oil to the downpipe, the frame body improves the stability between the mounting section and the liquid inlet pipe in the rotating process through the elastic layer, and the problem that the crane pipe is unstable when conveying oil is solved.

Description

Technical Field

[0001] This invention relates to the technical field of loading arms, and more particularly, to loading arms employing rigid connecting pipes. Background Technology

[0002] An loading arm (or arm for loading and unloading) is a retractable pipe used in oil and chemical terminals for loading and unloading liquids. It can transport media such as oil and water, and is also known as a fluid loading arm. There are various types, and compared to older flexible hoses, they offer advantages such as higher safety and flexibility. Railway and highway loading arms are specialized equipment used for loading and unloading fluids from railway tank cars and highway tank trucks. They can be categorized by loading / unloading method: top loading / unloading and bottom loading / unloading. Media that can be transported include petroleum products such as crude oil, gasoline, diesel, and lubricating oil; and chemical products such as concentrated sulfuric acid, liquefied natural gas, liquefied petroleum gas, molten sulfur, asphalt, and carbon disulfide.

[0003] In the prior art, loading arms generally use a frame to transport oil to the vertical pipe through an inlet pipe. The frame drives the vertical pipe to swing horizontally and move back and forth. However, during the swinging and moving process, the inlet pipe is prone to detachment or instability when transporting oil to the vertical pipe, resulting in leakage or blockage of oil during the transportation process. Summary of the Invention

[0004] The purpose of this invention is to provide an loading arm with a rigid connecting pipe, which aims to solve the problem of unstable oil delivery in the prior art.

[0005] The present invention is implemented as follows: an arm with a rigid connecting pipe includes a frame and an inlet pipe connected to the frame and arranged to rotate longitudinally. The top of the inlet pipe is closed, and the bottom of the inlet pipe has an inlet port for external oil to enter. A rigid connecting pipe with a retractable length is connected to the inlet pipe, and the rigid connecting pipe communicates with the inlet port.

[0006] The inlet pipe is provided with a horizontally arranged crossbeam that rotates synchronously with the inlet pipe. A movable frame that moves horizontally along the crossbeam is connected to the crossbeam. The upper part of the movable frame has an upper section, in which a hollow area is formed. The crossbeam passes through the hollow area and is movably connected to the upper section.

[0007] The lower part of the mobile frame has a longitudinally arranged lower section, in which a longitudinally telescopic vertical tube is provided. The lower end of the vertical tube extends to the bottom of the mobile frame to form a filling section that is inserted into the liquid injection port of the tank truck. The bottom of the filling section is provided with a liquid outlet. The upper end of the vertical tube is connected to and communicates with a rigid connecting pipe.

[0008] A drive motor is provided on the crossbeam. The drive motor drives the upper section to move, so that the moving frame moves along the crossbeam. The oil that enters through the inlet passes through the inlet pipe, the rigid connecting pipe and the vertical pipe in sequence, and is discharged from the outlet of the vertical pipe.

[0009] The frame is provided with a longitudinally arranged mounting arm, and the liquid inlet pipe is mounted on the mounting arm through a rotating structure; the liquid inlet pipe and the mounting arm are arranged at intervals, and a rotating interval is formed between the liquid inlet pipe and the mounting arm; the mounting arm has a mounting section arranged directly opposite to the liquid inlet pipe.

[0010] An elastic layer is fitted onto the mounting section, extending along the axial direction of the mounting section and facing the inlet pipe. The outer surface of the elastic layer is recessed away from the inlet pipe, forming a rotating groove extending along the axial direction of the mounting arm. The side of the inlet pipe is embedded in the rotating groove and presses against the inner sidewall of the rotating groove, and the elastic layer is in a state of pressure deformation.

[0011] Furthermore, the mounting section has an inner side facing the rotational interval and an outer side facing away from the rotational interval; the elastic layer is disposed on the inner side of the mounting section, and the two ends of the elastic layer extend to the outer side of the mounting section respectively, with the two ends of the elastic layer spaced apart to form an end gap.

[0012] Furthermore, the end of the elastic layer is fixedly connected to the outer surface of the mounting section, and the middle part of the elastic layer abuts against the inner surface of the mounting section and is in movable contact with the inner surface of the mounting section.

[0013] Furthermore, the inner surface of the mounting section protrudes towards the rotation interval and forms multiple arc-shaped strips, which are spaced apart along the axial direction of the mounting section and arranged around the circumference of the mounting section.

[0014] The inner surface of the elastic layer is recessed towards the rotation interval to form multiple arc-shaped grooves. The multiple arc-shaped grooves are arranged at intervals along the axial direction of the mounting section and are arranged around the circumference of the mounting section.

[0015] The arc-shaped strip is movably embedded in the arc-shaped groove. When the elastic layer is compressed and elastically deformed, the arc-shaped strip and the arc-shaped groove move relative to each other, and the elastic layer elastically deforms along the extension direction of the arc-shaped strip.

[0016] Furthermore, the rotating groove penetrates the outer surface of the elastic layer to form a groove opening, and rigid side strips are formed on both sides of the groove opening. The side strips extend along the length direction of the rotating groove. The side strips are flush with the outer surface of the elastic layer, and the two side strips are clamped and abutted against the outer surface of the liquid inlet pipe.

[0017] Furthermore, the rotating structure includes two fixed seats fixedly connected to the mounting section. The fixed seats extend away from the mounting section and form a mounting ring located outside the mounting section. The mounting ring is arranged horizontally, and the two mounting rings are arranged vertically at intervals.

[0018] The inlet pipe is located between two mounting rings, and the end of the inlet pipe is movably embedded in the mounting ring and rotatably connected to the mounting ring.

[0019] Furthermore, the upper section has a top plate located above the crossbeam at its top and a bottom plate located below the crossbeam at its bottom. Side strips are provided on both sides of the upper section, and the side strips are located on both sides of the crossbeam. The upper end of the side strip is connected to the top plate, and the lower end of the side strip is connected to the bottom plate. The top plate, side strips, and bottom plate surround and form the hollow area.

[0020] The top of the crossbeam is provided with a top rail groove, which extends along the length of the crossbeam. The bottom of the top plate extends with a top rail, which is movably embedded in the top rail groove.

[0021] The bottom of the top rail is covered with a top elastic strip, which presses against the bottom of the top rail groove from top to bottom. The top elastic strip is in a state of being pressed and deformed, and the two sides of the top elastic strip abut against the inner sidewall of the top rail groove respectively.

[0022] Furthermore, lateral rail grooves are provided on both sides of the crossbeam, the inner wall of the lateral rail grooves is arc-shaped, and the lateral rail grooves extend along the length of the crossbeam; the inner side of the lateral bar is provided with rolling balls made of elastic material and arranged in a rolling manner.

[0023] The inner side of the rolling ball is movably embedded in the lateral rail groove, and the outer side of the rolling ball is movably embedded in the lateral bar; when the moving frame moves horizontally along the crossbeam, the rolling ball moves synchronously between the crossbeam and the lateral bar along with the moving frame.

[0024] Furthermore, the interior of the vertical tube is hollow, forming an outlet cavity for discharging oil. The outlet cavity is connected to a rigid connecting pipe and an outlet. An annular wall extends upward from the outer periphery of the outlet, and the annular wall is arranged around the circumference of the outlet tube.

[0025] The bottom of the annular wall is integrated with the bottom of the vertical tube to form a closed ring; the upper end of the annular wall extends into the interior of the liquid outlet chamber, and the annular wall and the liquid outlet tube are spaced apart to form a liquid storage annular cavity, and the top of the liquid storage annular cavity has an annular cavity opening that communicates with the liquid storage annular cavity; an elastic recoil membrane layer is provided in the middle of the liquid storage annular cavity, and the membrane layer is arranged circumferentially around the middle of the liquid storage annular cavity.

[0026] After the oil is discharged from the outlet chamber, the film layer is impacted by the oil and bounces the oil in the storage ring cavity out. The residual oil on the inner wall of the outlet chamber flows downward along the inner wall of the outlet chamber and then enters the storage ring cavity through the ring cavity opening.

[0027] Furthermore, the upper part of the injection section is provided with a frustum-shaped sealing block, which wraps around the outer periphery of the injection section and is arranged around the outer periphery of the injection section; along the direction from top to bottom, the diameter of the sealing block gradually decreases.

[0028] The sealing block has a downward-facing upper stepped ring on its outer periphery, and an elastic lower annular cover on its outer periphery. The upper stepped ring and the lower annular cover are respectively arranged around the outer periphery of the sealing block, and the lower annular cover is located below the upper stepped ring.

[0029] The inner end of the lower annular cover is connected to the outer periphery of the sealing block. The outer end of the lower annular cover is bent upward and forms an annular gap with the outer periphery of the sealing block. An elastic filling layer is provided in the annular gap. The filling layer is connected to the outer periphery of the lower annular cover and the sealing block respectively.

[0030] The tanker truck has an oil storage tank, and the injection port is formed on the oil storage tank. When the filling section is inserted into the injection port of the tanker truck, the upper stepped ring is located outside the oil storage tank and presses against the outer side wall of the oil storage tank from top to bottom. The lower annular cover is placed inside the oil storage tank, and the outer end of the lower annular cover abuts against the inner side wall of the oil storage tank from bottom to top. The upper stepped ring and the lower annular cover clamp the oil storage tank from top to bottom and close the injection port.

[0031] Compared with the prior art, the loading arm provided by the present invention uses a rigid connecting pipe. The frame body connects the inlet pipe and the vertical pipe through the rigid connecting pipe. The extension and retraction of the rigid connecting pipe solves the problem of the inlet pipe detaching or becoming unstable when delivering oil to the vertical pipe. The frame body improves the stability between the installation section and the inlet pipe during rotation through the elastic layer, thus solving the problem of unstable oil delivery in the loading arm. Attached Figure Description

[0032] Figure 1 This is a schematic diagram of the structure of the loading arm using a rigid connecting pipe provided by the present invention. Figure 1 ;

[0033] Figure 2 This is a schematic diagram of the structure of the loading arm using a rigid connecting pipe provided by the present invention. Figure 2 ;

[0034] Figure 3 This is a top view of the installation section, liquid inlet pipe, and elastic layer provided by the present invention.

[0035] Figure 4 This is a side view sectional structural diagram of the upper section and crossbeam provided by the present invention;

[0036] Figure 5 This is a front view structural diagram of the infusion section provided by the present invention;

[0037] Figure 6 This is a top-view cross-sectional structural diagram of the injection section provided by the present invention.

[0038] In the diagram: Frame 100, Inlet pipe 200, Rigid connecting pipe 300, Crossbeam 400, Moving frame 500, Vertical pipe 600, Oil storage tank 700, Mounting arm 101, Rotating structure 102, Mounting section 103, Elastic layer 104, End spacer 105, Arc-shaped strip 106, Arc-shaped groove 107, Side strip 108, Mounting ring 109, Inlet 201, Drive motor 401, Top rail groove 402. Lateral rail groove 403, rolling ball 404, upper section 501, lower section 502, top plate 503, bottom plate 504, lateral strip 505, top rail 506, top elastic strip 507, filling section 601, liquid outlet 602, liquid outlet cavity 603, annular wall 604, liquid storage annular cavity 605, membrane layer 606, sealing block 607, upper step ring 608, lower annular cover 609, filling layer 610. Detailed Implementation

[0039] To make the objectives, technical solutions, and advantages of this invention clearer, the invention will be further described in detail below with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative and not intended to limit the invention.

[0040] The implementation of the present invention will be described in detail below with reference to specific embodiments.

[0041] In the accompanying drawings of this embodiment, the same or similar reference numerals correspond to the same or similar components. In the description of this invention, it should be understood that if terms such as "upper," "lower," "left," and "right" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, they are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, the terms used to describe positional relationships in the drawings are only for illustrative purposes and should not be construed as limiting this invention. For those skilled in the art, the specific meaning of the above terms can be understood according to the specific circumstances.

[0042] Reference Figure 1-6 The image shows a preferred embodiment of the present invention.

[0043] The loading arm with rigid connecting pipe includes a frame 100 and an inlet pipe 200 connected to the frame 100 and arranged longitudinally for rotation. The top of the inlet pipe 200 is closed, and the bottom of the inlet pipe 200 forms an inlet port 201 for external oil to enter. A rigid connecting pipe 300 with a retractable length is connected to the inlet pipe 200, and the rigid connecting pipe 300 communicates with the inlet port 201.

[0044] The inlet pipe 200 is provided with a horizontally arranged crossbeam 400 that rotates synchronously with the inlet pipe 200. A movable frame 500 that moves horizontally along the crossbeam 400 is connected to the crossbeam 400. The upper part of the movable frame 500 has an upper section 501, in which a hollow area is formed. The crossbeam 400 passes through the hollow area and is movably connected to the upper section 501.

[0045] The lower part of the mobile frame 500 has a longitudinally arranged lower section 502, in which a longitudinally telescopic vertical tube 600 is provided. The lower end of the vertical tube 600 extends to the bottom of the mobile frame 500 to form a filling section 601 that is inserted into the liquid filling port of the tank truck. The bottom of the filling section 601 is provided with a liquid outlet 602. The upper end of the vertical tube 600 is connected to and communicates with the rigid connecting pipe 300.

[0046] A drive motor 401 is provided on the crossbeam 400. The drive motor 401 drives the upper section 501 to move, so that the moving frame 500 moves along the crossbeam 400. The oil that enters through the inlet 201 passes through the inlet pipe 200, the rigid connecting pipe 300 and the vertical pipe 600 in sequence, and is discharged from the outlet 602 of the vertical pipe 600.

[0047] The frame 100 is provided with a longitudinally arranged mounting arm 101, and the liquid inlet pipe 200 is mounted on the mounting arm 101 through a rotating structure 102; the liquid inlet pipe 200 and the mounting arm 101 are arranged at intervals, and a rotating interval is formed between the liquid inlet pipe 200 and the mounting arm 101; the mounting arm 101 has a mounting section 103 arranged directly opposite to the liquid inlet pipe 200.

[0048] An elastic layer 104 is fitted onto the mounting section 103. The elastic layer 104 extends along the axial direction of the mounting section 103 and faces the inlet pipe 200. The outer surface of the elastic layer 104 is recessed away from the inlet pipe 200, forming a rotating groove that extends along the axial direction of the mounting arm 101. The side of the inlet pipe 200 is embedded in the rotating groove and presses against the inner sidewall of the rotating groove. The elastic layer 104 is in a state of pressure deformation.

[0049] The loading arm with rigid connecting pipe provided above connects the inlet pipe 200 to the vertical pipe 600 via the rigid connecting pipe 300. The extension and retraction of the rigid connecting pipe 300 solves the problem of the inlet pipe 200 becoming detached or unstable when transporting oil to the vertical pipe 600. The elastic layer 104 of the frame 100 improves the stability between the installation section 103 and the inlet pipe 200 during rotation, thus solving the problem of unstable oil transport in the loading arm.

[0050] The mounting arm 101 improves the transition stability of the inlet pipe 200 during rotation through the rotating structure 102, and the elastic layer 104 increases the contact area with the inlet pipe 200 by using rotating grooves, thereby increasing the frictional resistance of the elastic layer 104 on the surface of the inlet pipe 200, making the inlet pipe 200 more stable during rotation.

[0051] The mounting section 103 has an inner side facing the rotational interval and an outer side facing away from the rotational interval. An elastic layer 104 is disposed on the inner side of the mounting section 103, and both ends of the elastic layer 104 extend to the outer side of the mounting section 103 respectively. The two ends of the elastic layer 104 are spaced apart to form an end gap 105. In this way, when the elastic layer 104 is subjected to rotational friction between the liquid inlet pipe 200 and the mounting section 103, the elastic layer 104 can be extended and deformed through the end gap 105 to avoid excessive resistance to the liquid inlet pipe 200 and prevent it from rotating normally.

[0052] The end of the elastic layer 104 is fixedly connected to the outer surface of the mounting section 103, and the middle part of the elastic layer 104 abuts against the inner surface of the mounting section 103 and moves against the inner surface of the mounting section 103; in this way, the elastic layer 104 can be fixed to the mounting section 103 by the end of the elastic layer 104 to prevent the elastic layer 104 from moving at will, and can be flexibly deformed by the middle part of the elastic layer 104.

[0053] In this embodiment, the inner side of the mounting section 103 protrudes towards the rotation interval and forms a plurality of arc-shaped strips 106. The plurality of arc-shaped strips 106 are arranged at intervals along the axial direction of the mounting section 103 and the arc-shaped strips 106 are arranged around the circumference of the mounting section 103.

[0054] The inner surface of the elastic layer 104 is recessed towards the rotation interval to form a plurality of arc-shaped grooves 107. The plurality of arc-shaped grooves 107 are arranged at intervals along the axial direction of the mounting section 103, and the arc-shaped grooves 107 are arranged around the circumference of the mounting section 103.

[0055] The arc-shaped strip 106 is movably embedded in the arc-shaped groove 107. When the elastic layer 104 is compressed and elastically deformed, the arc-shaped strip 106 and the arc-shaped groove 107 move relative to each other, and the elastic layer 104 elastically deforms along the extension direction of the arc-shaped strip 106.

[0056] The installation section 103 provides a directional extension deformation direction for the elastic layer 104 when it is compressed and deformed by multiple arc-shaped strips 106, so as to avoid the elastic layer 104 from moving up and down and deforming, which would cause the liquid inlet pipe 200 to move up and down.

[0057] The rotating groove penetrates the outer surface of the elastic layer 104, forming a groove opening. Rigid side strips 108 are formed on both sides of the groove opening, and the side strips 108 extend along the length of the rotating groove. The side strips 108 are flush with the outer surface of the elastic layer 104, and the two side strips 108 clamp and abut against the outer surface of the liquid inlet pipe. In this way, the rotating groove is fitted with the liquid inlet pipe 200 through the groove opening, increasing the contact area between the rotating groove and the liquid inlet pipe 200. The side strips 108 also increase the ability of the rotating groove to transmit the compressive force to the elastic layer 104 and the mounting section 103 when it is squeezed by the liquid inlet pipe 200.

[0058] The rotating structure 102 includes two fixed seats fixedly connected to the mounting section 103. The fixed seats extend away from the mounting section 103 and form a mounting ring 109 located outside the mounting section 103. The mounting ring 109 is arranged horizontally, and the two mounting rings 109 are arranged vertically at intervals.

[0059] The inlet pipe is located between two mounting rings 109. The end of the inlet pipe 200 is movably embedded in the mounting ring 109 and rotatably connected to the mounting ring 109. In this way, the mounting section 103 clamps the inlet pipe 200 through the mounting rings 109 on the two fixed seats, so that there is a rotational gap between the inlet pipe 200 and the mounting section 103. The mounting rings 109 can reduce the frictional resistance of the inlet pipe 200 when rotating.

[0060] In this embodiment, the upper section 501 has a top plate 503 located above the crossbeam 400 at its top and a bottom plate 504 located below the crossbeam 400 at its bottom. Lateral strips 505 are provided on both sides of the upper section 501, and the lateral strips 505 are located on both sides of the crossbeam 400. The upper end of the lateral strip 505 is connected to the top plate 503, and the lower end of the lateral strip 505 is connected to the bottom plate 504. The top plate 503, the lateral strips 505, and the bottom plate 504 surround and form a hollow area.

[0061] The top of the crossbeam 400 is provided with a top rail groove 402, which extends along the length of the crossbeam 400. The bottom of the top plate 503 extends with a top rail 506, which is movably embedded in the top rail groove 402.

[0062] The bottom of the top rail 506 is covered with a top elastic strip 507. The top elastic strip 507 presses against the bottom of the top rail groove 402 from top to bottom. The top elastic strip 507 is in a state of being pressed and deformed. The two sides of the top elastic strip 507 respectively abut against the inner sidewall of the top rail groove 402.

[0063] The crossbeam 400 allows the movable frame 500 to move on the crossbeam 400 via the top rail groove 402. The upper section 501 is movably embedded in the top rail groove 402 via the top rail 506 on the top plate 503, increasing the overall stability of the movable frame 500 during movement. The top rail 506 uses the top elastic strip 507 to increase the frictional resistance between the top rail groove 402 and the top rail 506, thereby increasing the stability of the movable frame 500 when moving on the crossbeam 400.

[0064] In this embodiment, lateral rail grooves 403 are provided on both sides of the crossbeam 400. The inner sidewall of the lateral rail groove 403 is arc-shaped and the lateral rail groove 403 extends along the length of the crossbeam 400. The inner side of the lateral bar 505 is provided with rolling balls 404 made of elastic material and arranged in a rolling manner.

[0065] The inner side of the rolling ball 404 is movably embedded in the lateral rail groove 403, and the outer side of the rolling ball 404 is movably embedded in the lateral bar 505; when the moving frame 500 moves horizontally along the crossbeam 400, the rolling ball 404 moves synchronously between the crossbeam 400 and the lateral bar 505 along with the moving frame 500.

[0066] The movable frame 500 is movably embedded in the lateral rail groove 403 by the rolling ball 404 on the lateral bar 505, so that the lateral bar 505 and the crossbeam 400 have the function of a directional guide rail, thereby increasing the stability of the movable frame 500 during movement and preventing the movable frame 500 from swaying easily during movement.

[0067] In this embodiment, the interior of the vertical tube 600 is hollow, forming an oil outlet cavity 603. The oil outlet cavity 603 is connected to the rigid connecting tube 300 and the outlet 602 respectively. An annular wall 604 extends upward from the outer periphery of the outlet 602, and the annular wall 604 is arranged around the circumference of the oil outlet tube.

[0068] The bottom of the annular wall 604 is integrated with the bottom of the vertical tube 600 to form a closed ring; the upper end of the annular wall 604 extends into the interior of the liquid outlet chamber 603, and the annular wall 604 and the liquid outlet tube are spaced apart to form a liquid storage annular cavity 605, and the top of the liquid storage annular cavity 605 has an annular cavity opening that communicates with the liquid storage annular cavity 605; an elastic recoil membrane layer 606 is provided in the middle of the liquid storage annular cavity 605, and the membrane layer 606 is arranged circumferentially around the middle of the liquid storage annular cavity 605;

[0069] After the oil is discharged into the outlet cavity 603, the membrane layer 606 is subjected to the final impact of the oil, which causes the oil in the storage ring cavity 605 to bounce out. The residual oil on the inner wall of the outlet cavity 603 flows downward along the inner wall of the outlet cavity 603, and then enters the storage ring cavity 605 through the ring cavity opening.

[0070] After the oil is discharged into the outlet cavity 603 through the membrane layer 606, the final impact force of the oil pushes the membrane layer 606 in the storage ring cavity 605 to the bottom of the storage ring cavity 605, giving the membrane layer 606 a rebound property. Through the rebound property, the oil in the storage ring cavity 605 is ejected from the outlet 602. Then, the residual oil on the inner wall of the outlet cavity 603 flows down along the inner wall of the outlet cavity 603, and the residual oil enters the storage ring cavity 605 through the ring cavity opening for collection.

[0071] In this embodiment, a frustum-shaped sealing block 607 is provided on the upper part of the injection section 601. The sealing block 607 wraps around the outer periphery of the injection section 601 and is arranged around the outer periphery of the injection section 601. The diameter of the sealing block 607 gradually decreases from top to bottom along the direction of the sealing block 607.

[0072] The outer periphery of the sealing block 607 is formed with a downwardly arranged upper stepped ring 608, and the outer periphery of the sealing block 607 is provided with an elastic lower annular cover 609. The upper stepped ring 608 and the lower annular cover 609 are respectively arranged around the outer periphery of the sealing block 607, and the lower annular cover 609 is located below the upper stepped ring 608.

[0073] The inner end of the lower annular cover 609 is connected to the outer periphery of the sealing block 607. The outer end of the lower annular cover 609 is bent upward and forms an annular gap with the outer periphery of the sealing block 607. An elastic filling layer 610 is provided in the annular gap. The filling layer 610 is connected to the outer periphery of the lower annular cover 609 and the sealing block 607 respectively.

[0074] The tanker truck has an oil storage tank 700, and an injection port is formed on the oil storage tank 700. When the filling section 601 is inserted into the injection port of the tanker truck, the upper stepped ring 608 is located outside the oil storage tank 700 and presses against the outer side wall of the oil storage tank 700 from top to bottom. The lower annular cover 609 is placed inside the oil storage tank 700, and the outer end of the lower annular cover 609 abuts against the inner side wall of the oil storage tank 700 from bottom to top. The upper stepped ring 608 and the lower annular cover 609 clamp the oil storage tank 700 from top to bottom and close the injection port.

[0075] The filling section 601 increases the sealing and conveying efficiency between the filling section 601 and the injection port of the oil storage tank 700 through the sealing block 607. The sealing block 607 uses the upper stepped ring 608 to clamp the oil storage tank 700 with the lower annular cover 609, sealing the injection port. This allows the lower annular cover 609 to penetrate into the injection port, and the outer end of the lower annular cover 609 abuts against the inner wall of the oil storage tank 700 from bottom to top, increasing the sealing effect of the injection port. The filling layer 610 is used to increase the elastic relationship and connection stability between the lower annular cover 609 and the sealing block 607.

[0076] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An arm-mounted loading arm using a rigid connecting pipe, characterized in that, It includes a frame and a liquid inlet pipe connected to the frame and arranged to rotate longitudinally. The top of the liquid inlet pipe is closed, and the bottom of the liquid inlet pipe has a liquid inlet for external oil to enter. A rigid connecting pipe with a retractable length is connected to the liquid inlet. The inlet pipe is provided with a horizontally arranged crossbeam that rotates synchronously with the inlet pipe. A movable frame that moves horizontally along the crossbeam is connected to the crossbeam. The upper part of the movable frame has an upper section, in which a hollow area is formed. The crossbeam passes through the hollow area and is movably connected to the upper section. The lower part of the mobile frame has a longitudinally arranged lower section, in which a longitudinally telescopic vertical tube is provided. The lower end of the vertical tube extends to the bottom of the mobile frame to form a filling section that is inserted into the liquid injection port of the tank truck. The bottom of the filling section is provided with a liquid outlet. The upper end of the vertical tube is connected to and communicates with a rigid connecting pipe. A drive motor is provided on the crossbeam. The drive motor drives the upper section to move, so that the moving frame moves along the crossbeam. The oil that enters through the inlet passes through the inlet pipe, the rigid connecting pipe and the vertical pipe in sequence, and is discharged from the outlet of the vertical pipe. The frame is provided with a longitudinally arranged mounting arm, and the liquid inlet pipe is mounted on the mounting arm through a rotating structure; the liquid inlet pipe and the mounting arm are arranged at intervals, and a rotating interval is formed between the liquid inlet pipe and the mounting arm; the mounting arm has a mounting section arranged directly opposite to the liquid inlet pipe. An elastic layer is fitted onto the mounting section, extending along the axial direction of the mounting section and facing the inlet pipe. The outer surface of the elastic layer is recessed away from the inlet pipe, forming a rotating groove extending along the axial direction of the mounting arm. The side of the inlet pipe is embedded in the rotating groove and presses against the inner sidewall of the rotating groove, and the elastic layer is in a state of pressure deformation.

2. The loading arm employing a rigid connecting pipe as described in claim 1, characterized in that, The mounting section has an inner side facing the rotational interval and an outer side facing away from the rotational interval; the elastic layer is disposed on the inner side of the mounting section, and the two ends of the elastic layer extend to the outer side of the mounting section respectively, with the two ends of the elastic layer spaced apart to form an end gap.

3. The loading arm employing a rigid connecting pipe as described in claim 2, characterized in that, The end of the elastic layer is fixedly connected to the outer surface of the mounting section, and the middle part of the elastic layer abuts against the inner surface of the mounting section and is in movable contact with the inner surface of the mounting section.

4. The loading arm employing a rigid connecting pipe as described in claim 3, characterized in that, The inner surface of the mounting section protrudes towards the rotation interval and forms multiple arc-shaped strips. The multiple arc-shaped strips are arranged at intervals along the axial direction of the mounting section and are arranged around the circumference of the mounting section. The inner surface of the elastic layer is recessed towards the rotation interval to form multiple arc-shaped grooves. The multiple arc-shaped grooves are arranged at intervals along the axial direction of the mounting section and are arranged around the circumference of the mounting section. The arc-shaped strip is movably embedded in the arc-shaped groove. When the elastic layer is compressed and elastically deformed, the arc-shaped strip and the arc-shaped groove move relative to each other, and the elastic layer elastically deforms along the extension direction of the arc-shaped strip.

5. The loading arm employing a rigid connecting pipe as described in claim 4, characterized in that, The rotating groove penetrates the outer surface of the elastic layer, forming a groove opening. Rigid side strips are formed on both sides of the groove opening, and the side strips extend along the length of the rotating groove. The side strips are flush with the outer surface of the elastic layer, and the two side strips are clamped and abutted against the outer surface of the liquid inlet pipe.

6. The loading arm employing a rigid connecting pipe as described in any one of claims 1 to 5, characterized in that, The rotating structure includes two fixed seats fixedly connected to the mounting section. The fixed seats extend away from the mounting section and form a mounting ring located outside the mounting section. The mounting ring is arranged horizontally, and the two mounting rings are arranged vertically at intervals. The inlet pipe is located between two mounting rings, and the end of the inlet pipe is movably embedded in the mounting ring and rotatably connected to the mounting ring.

7. The loading arm employing a rigid connecting pipe as described in any one of claims 1 to 5, characterized in that, The upper section has a top plate above the crossbeam at the top and a bottom plate below the crossbeam at the bottom. Side strips are provided on both sides of the upper section, and the side strips are located on both sides of the crossbeam. The upper end of the side strip is connected to the top plate, and the lower end of the side strip is connected to the bottom plate. The top plate, side strips, and bottom plate surround and form the hollow area. The top of the crossbeam is provided with a top rail groove, which extends along the length of the crossbeam. The bottom of the top plate extends with a top rail, which is movably embedded in the top rail groove. The bottom of the top rail is covered with a top elastic strip, which presses against the bottom of the top rail groove from top to bottom. The top elastic strip is in a state of being pressed and deformed, and the two sides of the top elastic strip abut against the inner sidewall of the top rail groove respectively.

8. The loading arm employing a rigid connecting pipe as described in claim 7, characterized in that, Lateral rail grooves are provided on both sides of the crossbeam, the inner wall of the lateral rail grooves is arc-shaped, and the lateral rail grooves extend along the length of the crossbeam; the inner side of the lateral rails is provided with rolling balls made of elastic material and arranged in a rolling manner. The inner side of the rolling ball is movably embedded in the lateral rail groove, and the outer side of the rolling ball is movably embedded in the lateral bar; when the moving frame moves horizontally along the crossbeam, the rolling ball moves synchronously between the crossbeam and the lateral bar along with the moving frame.

9. The loading arm employing a rigid connecting pipe as described in any one of claims 1 to 5, characterized in that, The interior of the vertical tube is hollow, forming an outlet cavity for discharging oil. The outlet cavity is connected to a rigid connecting pipe and an outlet. An annular wall extends upward from the outer periphery of the outlet, and the annular wall is arranged around the circumference of the outlet tube. The bottom of the annular wall is integrated with the bottom of the vertical tube to form a closed ring; the upper end of the annular wall extends into the interior of the liquid outlet chamber, and the annular wall and the liquid outlet tube are spaced apart to form a liquid storage annular cavity, and the top of the liquid storage annular cavity has an annular cavity opening that communicates with the liquid storage annular cavity; an elastic recoil membrane layer is provided in the middle of the liquid storage annular cavity, and the membrane layer is arranged circumferentially around the middle of the liquid storage annular cavity. After the oil is discharged from the outlet chamber, the film layer is impacted by the oil and bounces the oil in the storage ring cavity out. The residual oil on the inner wall of the outlet chamber flows downward along the inner wall of the outlet chamber and then enters the storage ring cavity through the ring cavity opening.

10. The loading arm employing a rigid connecting pipe as described in claim 9, characterized in that, The upper part of the injection section is provided with a frustum-shaped sealing block, which wraps around the outer periphery of the injection section and is arranged around the outer periphery of the injection section; the diameter of the sealing block gradually decreases from top to bottom. The sealing block has a downward-facing upper stepped ring on its outer periphery, and an elastic lower annular cover on its outer periphery. The upper stepped ring and the lower annular cover are respectively arranged around the outer periphery of the sealing block, and the lower annular cover is located below the upper stepped ring. The inner end of the lower annular cover is connected to the outer periphery of the sealing block. The outer end of the lower annular cover is bent upward and forms an annular gap with the outer periphery of the sealing block. An elastic filling layer is provided in the annular gap. The filling layer is connected to the outer periphery of the lower annular cover and the sealing block respectively. The tanker truck has an oil storage tank, and the injection port is formed on the oil storage tank. When the filling section is inserted into the injection port of the tanker truck, the upper stepped ring is located outside the oil storage tank and presses against the outer side wall of the oil storage tank from top to bottom. The lower annular cover is placed inside the oil storage tank, and the outer end of the lower annular cover abuts against the inner side wall of the oil storage tank from bottom to top. The upper stepped ring and the lower annular cover clamp the oil storage tank from top to bottom and close the injection port.

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