Small loading arm loading follow-up pressing and sealing device

Abstract

The utility model discloses a follow-up pressing and sealing device for loading of a small crane pipe. The follow-up pressing and sealing device is composed of a sealing cover, a sealing sheath, a pressing air cylinder, a pressure sensor and a pneumatic device. The sealing cover sealing gasket is made of a plane silica gel gasket and can meet the requirement for sealing tank openings of all existing tank trucks, it is always guaranteed that the sealing gasket has enough compression amount in the loading operation process, the good sealing effect is guaranteed, and the sealing cover plate is installed on a small crane pipe through a spherical hinge bearing and used for making up for unevenness deviation of the tank openings. When the device moves, the guide rod can be driven to horizontally move, when the guide rod horizontally moves, the sealing ring can be driven to move towards the outer side, the sealing ring can clamp the side wall of the tank opening, and therefore secondary sealing is achieved between the tank opening and the device, and the sealing effect is good. Therefore, oil gas leakage is prevented for the second time.

Description

Technical Field

[0001] The present application relates to the technical field of crane pipe sealing devices, and in particular to a small crane pipe loading follow-up compression sealing device. Background Art

[0002] At present, the sealing device of the small crane pipe adopts a disc-type sealing cover, the sealing material is a stainless steel frame, and the fluororubber bladder is filled with fillers. It is found that the bladder of this sealing form is prone to aging and damage during use, which is prone to oil and gas leakage. When the damage is serious, the filler in the bladder is easy to fall into the tank. This sealing form also does not solve the impact of the height change of the tank truck itself on the sealing surface when the empty truck and the loaded truck are in a state of poor sealing performance with dynamic compression, which is also prone to oil and gas leakage. Utility Model Content

[0003] One of the purposes of the present application is to provide a small crane pipe loading follow-up compression sealing device.

[0004] In order to achieve the above purpose, the technical solution adopted in the present application is: a small crane tube loading follow-up compression sealing device, including a cylinder lower pressure balancing mechanism, a sealing cover mechanism, a pressure sensor and a pneumatic circuit system, the cylinder lower pressure balancing mechanism includes a cylinder rear end fixed beam, a rear cover locking cylinder, a cylinder front end connecting beam and 4 sets of universal shaft assemblies, one side of the cylinder front end connecting beam is connected to the piston rod end of the rear cover locking cylinder, and the other side is connected to one end of the universal shaft assembly, the other end of the universal shaft assembly is connected to one side of the sealing gasket cover plate, and the rear cover of the rear cover locking cylinder is connected to the cylinder rear end fixed beam;

[0005] The sealing cover mechanism includes a sealing gasket cover plate, a sealing gasket, a ball head seat plate and a ball head, wherein the sealing gasket cover plate, the ball head seat plate and the ball head are connected as a whole to form a ball joint bearing, a sealing gasket is arranged on the other side of the sealing gasket cover plate, one end of the sealing sleeve is connected to the ball head seat plate, and the other end is connected to the loading crane pipe sleeve, and a high-level liquid level detection device interface is arranged on the sealing gasket cover plate;

[0006] The pneumatic circuit system includes a triplet, a double-electrically controlled three-position five-way valve, a single-electrically controlled two-position two-way valve and a one-way throttle valve. One side of the pneumatic circuit is connected to the air source and the other side is connected to the cylinder.

[0007] A vertical plate is arranged on the front connecting beam of the cylinder, and the vertical plate is slidably connected in the rear seat, and the rear seat is arranged on the guide rod, and a sealing ring is arranged on the output end of the guide rod, and the guide rod is slidably connected to the support of the sealing gasket cover plate.

[0008] Preferably, the support is arranged in a rectangular shape, a bottom groove is opened on the support, a guide wheel is slidably connected in the bottom groove, the guide wheel is arranged on the side edge of the guide rod, and the guide rod is horizontally slidably connected to the support.

[0009] Preferably, a groove is provided on the guide rod, the groove is U-shaped, the groove is slidably connected to the support, and a rear seat is provided on one end of the guide rod.

[0010] Preferably, the rear seat is provided with an inclined groove, a rotating rod is slidably connected in the inclined groove, the rotating rod is arranged on the vertical plate, the rear seat is arranged in an L-shape as a whole, a lower plate is provided on the guide rod connected to the rear seat, and the lower plate is connected to the support through a spring.

[0011] Compared with the prior art, the beneficial effects of this application are:

[0012] The device consists of a closed cover, a sealing sleeve, a compression cylinder, a pressure sensor and a pneumatic device. The closed cover gasket is made of a flat silicone gasket, which can meet the tank mouth sealing needs of all current tank trucks. During the loading operation, the gasket is always guaranteed to have sufficient compression to ensure a good sealing effect.

[0013] The sealing cover plate is installed on the small crane tube through a ball joint bearing to compensate for the unevenness deviation of the tank mouth, ensure that the sealing gasket fits evenly and tightly with the tank mouth, and produce a good sealing effect.

[0014] When the device moves, it will drive the guide rod to move horizontally. When the guide rod moves horizontally, it will drive the sealing ring to move outward. The sealing ring will clamp the side wall of the tank mouth, so that the tank mouth and the device are sealed for the second time, thereby preventing oil and gas leakage for the second time. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 The main view of the utility model Figure 1 .

[0016] Figure 2 The main view of the utility model Figure 2 .

[0017] Figure 3 It is a three-dimensional structural schematic diagram of the utility model.

[0018] Figure 4 It is a structural schematic diagram of the vertical plate in the utility model.

[0019] Figure 5 It is a structural schematic diagram of the chute in the utility model.

[0020] Figure 6 It is a structural schematic diagram of the guide wheel in the utility model.

[0021] In the figure: 1. Fixed beam at the rear end of the cylinder; 2. Cylinder with locking on the rear cover; 3. Sealing sleeve; 4. Connecting beam at the front end of the cylinder; 5. Universal shaft assembly; 6. Sealing gasket cover plate; 7. Sealing gasket; 8. Ball head upper seat plate; 9. Ball head; 10. Interface for high-level liquid level detection device; 11. Air source; 12. Triple joint; 13. Double-electric three-position five-way valve; 14. Single-electric two-position two-way valve; 15. Pressure sensor; 16. One-way throttle valve; 17. Sealing ring; 18. Support; 19. Lower plate; 20. Guide rod; 21. Rear seat; 22. Vertical plate; 23. Groove; 24. Rotating rod; 25. Inclined groove; 26. Guide wheel; 27. Bottom groove. DETAILED DESCRIPTION

[0022] Below, the present application is further described in conjunction with specific implementation methods. It should be noted that, under the premise of no conflict, the various embodiments or technical features described below can be arbitrarily combined to form new embodiments.

[0023] In the description of the present application, it should be noted that directional words, such as the terms "center", "lateral", "longitudinal", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", etc., indicating directions and positional relationships are based on the directions or positional relationships shown in the accompanying drawings, which are only for the convenience of narrating the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and cannot be understood as limiting the specific scope of protection of the present application.

[0024] It should be noted that the terms "first", "second", etc. in the description and claims of the present application are used to distinguish similar objects, and are not necessarily used to describe a specific order or sequence.

[0025] Embodiment 1:

[0026] like Figures 1 to 6As shown, a small crane tube loading follow-up compression sealing device of the utility model comprises a cylinder lower pressure equalizing mechanism, a sealing cover mechanism, a pressure sensor 15 and a pneumatic circuit system. The cylinder lower pressure equalizing mechanism comprises a cylinder rear end fixed beam 1, a rear cover locking cylinder 2, a cylinder front end connecting beam 4 and 4 sets of universal shaft assemblies 5. One side of the cylinder front end connecting beam 4 is connected to the piston rod end of the rear cover locking cylinder 2, and the other side is connected to one end of the universal shaft assembly 5. The other end of the universal shaft assembly 5 is connected to one side of the sealing gasket cover plate 6. The rear cover of the rear cover locking cylinder 2 is connected to the cylinder rear end fixed beam 1. The initial state is that the piston rod of the rear cover locking cylinder 2 is fully retracted and in a locked state, and the sealing gasket 7 is in the upper position. When starting to work, the sealing gasket 7 rotates with the small crane tube to the top of the tank mouth, the rear cover locking cylinder 2 has a lock cavity to intake air, the rear cover lock is unlocked, the piston rod extends, drives the sealing gasket 7 downward, and presses the sealing gasket 7 at the tank mouth. When the pressure sensor When the pressure sensor 15 detects that the pressure in the cavity has reached the set upper limit, the air inlet path of the lock cavity of the rear cover locking cylinder 2 is disconnected, the piston rod is kept in an extended state, the sealing gasket 7 is pressed to maintain a good seal, and the loading operation begins; when the sealing gasket 7 moves downward with the tank mouth, the pressure in the lock cavity of the rear cover locking cylinder 2 decreases, and when the pressure sensor 15 detects that the pressure in the cavity is lower than the set lower limit, the cylinder lock cavity resumes air intake, the piston rod is extended again, and the sealing gasket 7 is pressed to maintain a good seal; at the end of the loading operation, the lock cavity of the rear cover locking cylinder 2 has no air intake, the piston rod is retracted, and the sealing gasket 7 is lifted upward until the piston rod is completely retracted, the rear cover locks the piston rod to complete the operation cycle, and the cylinder lower pressure balancing mechanism formed by the lock cylinder 2 attached to the rear cover, the fixed beam 1 at the rear end of the cylinder, the connecting beam 4 at the front end of the cylinder, and the 4 sets of universal shaft assemblies 5 connect each other, and the lower pressure of the lock cylinder 2 attached to the rear cover acts on the sealing gasket 7 in a balanced manner to ensure that the sealing gasket 7 and the tank mouth are well sealed;

[0027] The sealing cover mechanism includes a sealing gasket cover plate 6, a sealing gasket 7, a seat plate 8 on the ball head and a ball head 9. The sealing gasket cover plate 6, the seat plate 8 on the ball head and the ball head 9 are connected as a whole to form a ball hinge bearing. A sealing gasket 7 is arranged on the other side of the sealing gasket cover plate 6. One end of the sealing sleeve 3 is connected to the seat plate 8 on the ball head, and the other end is connected to the outer sleeve of the loading crane pipe. A high-level liquid level detection device interface 10 is arranged on the sealing gasket cover plate 6. The sealing gasket cover plate 6, the seat plate 8 on the ball head and the ball head 9 are connected as a whole to form a ball hinge bearing, so that the sealing gasket 7 is in a floating state, which can compensate for the unevenness deviation of the tank mouth and ensure that the sealing gasket 7 is evenly and tightly fitted with the tank mouth to produce a good sealing effect. The sealing gasket 7 is arranged on the sealing gasket cover plate 6 in an inlaid tire-type structure. When the external pressure increases, the sealing effect is better. The sealing sleeve 3 is used for dustproof and sealing at the ball hinge bearing. The high-level liquid level detection device interface 10 is used to install a fixed high-level liquid level detection device;

[0028] The pneumatic circuit system includes a triplet 12, a double-electrically controlled three-position five-way valve 13, a single-electrically controlled two-position two-way valve 14 and a one-way throttle valve 16. One side of the pneumatic circuit is connected to the air source 11, and the other side is connected to the cylinder;

[0029] A vertical plate 22 is provided on the front connecting beam 4 of the cylinder, and the vertical plate 22 is slidably connected in the rear seat 21. The rear seat 21 is provided on the guide rod 20. A sealing ring 17 is provided at the output end of the guide rod 20, and the guide rod 20 is slidably connected to the support 18 of the sealing gasket cover plate 6.

[0030] like Figures 1 to 6 As shown, the support 18 is arranged in a rectangular shape, and a bottom groove 27 is provided on the support 18, and a guide wheel 26 is slidably connected in the bottom groove 27, and the guide wheel 26 is arranged on the side edge of the guide rod 20, and the guide rod 20 is horizontally slidably connected to the support 18; a groove 23 is provided on the guide rod 20, and the groove 23 is arranged in a U shape, and the groove 23 is slidably connected to the support 18, and a rear seat 21 is arranged at one end of the guide rod 20; an inclined groove 25 is provided on the rear seat 21, and a rotating rod 24 is slidably connected in the inclined groove 25, and the rotating rod 24 is arranged on the vertical plate 22, and the rear seat 21 is arranged in an L shape as a whole, and a lower plate 19 is provided on the guide rod 20 connected to the rear seat 21, and the lower plate 19 is connected to the support 18 through a spring. During the operation of the equipment, the vertical plate 22 will be driven to move, and the vertical plate 22 will push the guide rod 20, so that the sealing ring 17 is clamped at the connection between the equipment and the tank mouth, thereby performing secondary sealing.

[0031] During implementation, when the small crane pipe is loaded, as the amount of oil in the tank truck increases, the tank body will move down a little, and the sealing gasket 7 will drop accordingly. The piston rod of the rear cover locking cylinder 2 will extend again, and the sealing gasket 7 will be compressed to maintain a sufficient compressive deformation, ensuring that the sealing gasket 7 and the tank mouth are always in a good sealing state, and secondary sealing can be achieved through the movement of the sealing ring 17.

[0032] The working principle of the utility model is as follows: when the left end of the three-position five-way valve is energized, the lock cylinder 2 with the rear cover has air intake in the lock chamber, the cylinder is unlocked, the piston rod is extended, and the seal 7 is driven downward to press the seal 7 at the tank mouth of the tank truck. When the pressure sensor 15 detects that the pressure in the cavity reaches the set upper limit value, the two-position two-way valve is energized, the air intake path of the lock chamber of the cylinder is disconnected, the piston rod is kept in an extended state, and the seal 7 is pressed to maintain a good seal; when the seal 7 moves downward with the tank mouth of the tank truck, the pressure in the lock chamber of the cylinder decreases, and when the pressure sensor 15 detects that the pressure in the cavity is lower than the set lower limit value, the two-position two-way valve loses power, the lock chamber of the cylinder resumes air intake, the piston rod is extended again, and the seal 7 is pressed to maintain a good seal; when the right end of the three-position five-way valve is energized, the cylinder has no lock chamber intake, the piston rod is retracted, and the seal 7 is lifted upward until the piston rod is completely retracted, the rear cover is locked to lock the piston rod, and the operation cycle is completed. During the working process, the sealing ring 17 will move between the equipment and the tank mouth, thereby realizing secondary sealing.

[0033] The above describes the basic principles, main features and advantages of the present application. Those skilled in the art should understand that the present application is not limited by the above embodiments, and the above embodiments and the specification only describe the principles of the present application. The present application may have various changes and improvements without departing from the spirit and scope of the present application, and these changes and improvements fall within the scope of the present application for which protection is sought. The scope of protection claimed by the present application is defined by the attached claims and their equivalents.

Claims

1. A small crane pipe loading follow-up compression sealing device, comprising a cylinder lower pressure equalization mechanism, a sealing cover mechanism, a pressure sensor (15) and a pneumatic circuit system, characterized in that: The cylinder lower pressure equalization mechanism comprises a cylinder rear end fixed beam (1), a rear cover locking cylinder (2), a sealing sleeve (3), a cylinder front end connecting beam (4) and four sets of universal shaft assemblies (5); the outer edge of the cylinder front end connecting beam (4) is connected to the piston rod at the output end of the rear cover locking cylinder (2); the lower end surface of the cylinder front end connecting beam (4) is connected to the input end of the universal shaft assembly (5); the output end of the universal shaft assembly (5) is connected to the mounting end surface of the sealing gasket cover plate (6); and the rear cover of the rear cover locking cylinder (2) is connected to the cylinder rear end fixed beam (1).

2. A small crane pipe loading follow-up compression sealing device as claimed in claim 1, characterized in that: The sealing cover mechanism comprises a sealing gasket cover plate (6), a sealing gasket (7), a ball head upper plate (8) and a ball head (9); the sealing gasket cover plate (6), the ball head upper plate (8) and the ball head (9) are connected as a whole to form a ball joint bearing; a sealing gasket (7) is provided at the output end of the sealing gasket cover plate (6); one end of the sealing sleeve (3) is connected to the ball head upper plate (8) and the other end is connected to the loading crane pipe sleeve; and a high-level liquid level detection device interface (10) is provided on the sealing gasket cover plate (6).

3. A small crane pipe loading follow-up compression sealing device as claimed in claim 1, characterized in that: The pneumatic circuit system comprises a triplet (12), a double-electrically controlled three-position five-way valve (13), a single-electrically controlled two-position two-way valve (14) and a one-way throttle valve (16). One side of the pneumatic circuit system is connected to the air source (11), and the other side is connected to the rear cover locking cylinder (2). The rear cover locking cylinder (2), the cylinder rear end fixing beam (1), the cylinder front end connecting beam (4) and more than three sets of universal shaft assemblies (5) are connected to form a cylinder downward pressure balancing mechanism, which is used to balance the downward pressure of the rear cover locking cylinder (2) on the sealing gasket (7) to ensure that the sealing gasket (7) and the tank mouth are well sealed.

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