A rotary clamp cylinder for a pneumatic seal cap

Abstract

The utility model relates to riser technology field, and disclose a kind of rotary clamping pneumatic cylinder for pneumatic seal cap, including cylinder barrel, further include: the guide bushing assembly of being set in the bottom of cylinder barrel, the guide bushing assembly includes the first O ring of being set in the bottom of cylinder barrel, the outside of the first O ring is provided with guide bushing body, the inside of guide bushing body is provided with guide pin post, the inside of guide bushing body is provided with the first installation hole of being used with guide pin post cooperation;Piston rod assembly is set in the inside of guide bushing body, the piston rod assembly includes the bottom pin post of being set in the inside of guide bushing body, the outside of the bottom pin post is provided with bottom plunger, the inside of bottom plunger is provided with sliding ring, second O ring and magnetic ring;The utility model can use to the different caliber of tank mouth by setting guide bushing assembly and piston rod assembly, and simultaneously its sealing property is higher.

Description

TECHNICAL FIELD

[0001] The utility model relates to crane pipe technical field, concretely is a rotary clamping pneumatic cylinder for pneumatic seal cap. BACKGROUND

[0002] Crane pipe is a telescopic pipe, which is used for loading and unloading liquid in oil and chemical wharf, and the medium in the pipe is oil, water, etc. It has high safety and flexibility compared with the old hose. In the transportation of fluid medium such as oil and natural gas, the pipe can be transported by pipeline, train and automobile, but before using automobile to transport fluid in oil and chemical industry, the fluid needs to be loaded and filled into the automobile tank. At present, loading and filling is mostly open type, that is, the oil filling pipe is directly inserted into the automobile tank opening. During the loading and filling process, the residual gas in the automobile tank and the gas generated by the fluid medium during the filling process are directly discharged into the atmosphere, which not only causes environmental pollution, but also has a great impact on safety production and personal safety, and even causes fire and explosion accidents, and also causes waste of fluid medium.

[0003] The existing closed loading is only provided with a sealing cover on the upper part of the crane pipe vertical pipe, but due to the lack of relevant specifications and standards for the design of oil tank car production, the size of the oil tank car and the tank opening is not uniformly regulated, the height of the vehicle and the diameter of the tank opening are greatly different, and the size of the oil tank car and the tank opening is different, so that the single sealing cap cannot cover all the tank openings, the sealing cap cannot tightly fit the tank opening, and due to the long length of the loading arm and the connection of the rotary joint, the downward supporting force of the loading arm is insufficient, the loading arm generally uses compression spring to balance the outer arm, the compression spring force of the general spring is greater than the weight of the outer arm, and the outer arm of the loading arm is easy to rebound, so that the traditional loading arm cannot provide sufficient downward sealing pressure, thereby causing oil and gas leakage during the loading process of the oil tank car, which brings great difficulty to the collection and recovery of oil and gas volatilization, thereby directly affecting the utilization efficiency of the oil and gas recovery device. CONTENT OF THE UTILITY MODEL

[0004] The utility model aims at providing a rotary clamping pneumatic cylinder for pneumatic seal cap, to solve the problem that part of the sealing device can realize the sealing effect of the tank opening, but is not suitable for various tank openings with different diameters, and part of the sealing device is not suitable for the sealing loading and unloading of various liquid media in the tank car, and part of the sealing cap can realize the clamping function, but the structure or operation is complex.

[0005] To achieve the above-mentioned purpose, the utility model provides the following technical scheme: a rotary clamping pneumatic cylinder for pneumatic seal cap, which comprises a cylinder barrel, and further comprises:

[0006] The guide shaft sleeve assembly arranged at the bottom of the cylinder barrel comprises a first O-shaped ring arranged at the bottom of the cylinder barrel, an outer side of the first O-shaped ring is provided with a guide shaft sleeve body, an inner side of the guide shaft sleeve body is provided with a guide pin column, and a first mounting hole matched with the guide pin column is formed in the inner side of the guide shaft sleeve body;

[0007] The piston rod assembly arranged in the inner side of the guide shaft sleeve body comprises a bottom pin column arranged in the inner side of the guide shaft sleeve body, an outer side of the bottom pin column is provided with a bottom plunger, and an inner side of the bottom plunger is provided with a sliding ring, a second O-shaped ring and a magnetic ring.

[0008] Preferably, the piston rod assembly further comprises a rubber gasket arranged at the bottom of the bottom plunger, a piston rod is arranged at the bottom of the bottom plunger, a copper cross arm is arranged at the bottom of the piston rod, and an inner hexagonal bolt is arranged in the inner side of the copper cross arm.

[0009] Preferably, a jackscrew is arranged in the inner side of the cylinder barrel, and a clamping spring is arranged in the inner side of the cylinder barrel.

[0010] Preferably, a second mounting hole matched with the bottom pin column is formed in the inner side of the bottom plunger, and a first screw hole matched with the inner hexagonal bolt is formed in the inner side of the piston rod.

[0011] Preferably, a second screw hole matched with the inner hexagonal bolt is formed in the inner side of the copper cross arm, and a rotating groove is formed in the inner side of the piston rod.

[0012] Compared with the prior art, the utility model has the advantages that:

[0013] The utility model discloses a guide shaft sleeve assembly and a piston rod assembly are arranged, so that the device can be sealed in multiple layers, and the device is not easy to be damaged, durable, wear-resistant, stable in performance, small in installation size, reliable in structure, simple in structure and practical in use, meets the rotation and downward pressing action under the limited space design requirement, and the device is widely applicable to various tank openings of cars and trains and is applicable to the sealed loading and unloading of various liquid media in tank cars. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 A structure schematic view of a preferred embodiment of the rotary clamping air cylinder for the pneumatic sealing cap is provided.

[0015] Figure 2 The wire shaft sleeve assembly structure schematic view is provided for the utility model;

[0016] Figure 3 The piston rod assembly structure schematic view is provided for the utility model;

[0017] Figure 4 The cylinder barrel and piston rod structure connection schematic view is provided for the utility model;

[0018] Figure 5 The cylinder barrel structure sectional view is provided for the utility model;

[0019] Figure 6 The piston rod structure schematic view is provided for the utility model.

[0020] In the drawing: 1, cylinder barrel; 2, guide shaft sleeve assembly; 201, first O-shaped ring; 202, guide pin column; 203, guide shaft sleeve body; 204, first mounting hole; 3, piston rod assembly; 301, bottom pin column; 302, sliding ring; 303, second O-shaped ring; 304, magnetic ring; 305, bottom plunger; 306, rubber gasket; 307, piston rod; 308, copper cross arm; 309, inner hexagonal bolt; 4, top wire; 5, snap spring; 6, second mounting hole; 7, first screw hole; 8, second screw hole; 9, rotation groove. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, rather than all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0022] Please refer to Figures 1-6As shown, a rotary clamping air cylinder for a pneumatic sealing cap comprises a cylinder barrel 1, which is formed by one-time machining and has a surface treated with hardening and an inner surface polished to improve the wear resistance of the cylinder barrel, and the surface is provided with an air outlet hole and an air inlet hole, which are machined and have a limiting groove matched with a snap spring 5 inside for facilitating assembly and disassembly, and the surface of the cylinder barrel 1 is machined with a third mounting hole of a jackscrew 4. The rotary clamping air cylinder further comprises a guide shaft sleeve assembly 2 arranged at the bottom of the cylinder barrel 1. The guide shaft sleeve assembly 2 comprises a first O-ring 201 arranged at the bottom of the cylinder barrel 1. The first O-ring 201 is made of imported fluorine rubber sealing ring, which has the characteristics of wear resistance, high temperature resistance, no easy leakage and long service life, and is in interference fit with the guide shaft sleeve body 203 and the cylinder barrel 1. The outside of the first O-ring 201 is provided with the guide shaft sleeve body 203. The guide shaft sleeve body 203 is internally provided with an installation groove for fixing the first O-ring 201 and a guide pin column 202, and is internally machined for the through hole installation of a piston rod 307. The guide shaft sleeve body 203 is internally provided with the guide pin column 202. The guide pin column 202 is installed in a first mounting hole 204 of the guide shaft sleeve body 203 and protrudes 2 mm to cooperatively guide the rotary groove 9 of the piston rod 307.

[0023] The rotary clamping air cylinder further comprises a piston rod assembly 3 arranged inside the guide shaft sleeve body 203. The piston rod assembly 3 comprises a bottom pin column 301 arranged inside the guide shaft sleeve body 203. The outside of the bottom pin column 301 is provided with a bottom plunger 305. The bottom plunger 305 is integrally machined and made of aluminum alloy and treated with hardening to provide its practical durability. The inside of the bottom plunger 305 is provided with a sliding ring 302, a second O-ring 303 and a magnetic ring 304. The sliding ring 302 is made of polytetrafluoroethylene material and has the functions of self-lubrication and guidance. The second O-ring 303 is in interference fit with the bottom plunger 305 and the cylinder barrel 1 to have good sealing performance and not easy to leak air. The magnetic ring 304 is made of magnet and can be cooperatively used with a magnetic switch.

[0024] Reference Figure 3 , Figure 4 and Figure 6As shown, the piston rod assembly 3 further comprises a rubber gasket 306 arranged at the bottom of the bottom plunger 305, the bottom of the bottom plunger 305 is provided with a piston rod 307, by arranging the piston rod 307, the piston rod 307 is treated with hard chromium plating, high-strength wear-resistant, impact-resistant and not bending, and the piston rod 307 is provided with a copper cross arm 308 mounting groove, the bottom of the piston rod 307 is provided with the copper cross arm 308, by arranging the copper cross arm 308, the copper cross arm 308 is made of high-strength brass alloy, and is not easy to spark when contacting with steel metal, the inside of the copper cross arm 308 is provided with an internal hexagonal bolt 309, by arranging the internal hexagonal bolt 309, under the action of the internal hexagonal bolt 309, the copper cross arm 308 and the piston rod 307 can be connected stably.

[0025] The inside of the cylinder barrel 1 is provided with a jackscrew 4, by arranging the jackscrew 4, under the action of the jackscrew 4, the jackscrew 4 can prevent the guiding shaft sleeve assembly 2 from being oriented, the inside of the cylinder barrel 1 is provided with a snap spring 5, by arranging the snap spring 5, under the action of the snap spring 5, the guiding shaft sleeve assembly 2 and the piston rod assembly 3 can be prevented from being pulled out of the cylinder barrel 1.

[0026] The inside of the bottom plunger 305 is provided with a second mounting hole 6 used in cooperation with the bottom pin column 301, by arranging the second mounting hole 6, under the action of the second mounting hole 6, the bottom plunger 305 and the piston rod 307 can be connected stably through the bottom pin column 301, the inside of the piston rod 307 is provided with a first screw hole 7 used in cooperation with the internal hexagonal bolt 309.

[0027] The inside of the copper cross arm 308 is provided with a second screw hole 8 used in cooperation with the internal hexagonal bolt 309, by arranging the first screw hole 7 and the second screw hole 8, and then rotating the internal hexagonal bolt 309, the internal hexagonal bolt 309 can enter the inside of the first screw hole 7 and the second screw hole 8, so as to position and fix the copper cross arm 308 and the piston rod 307, the inside of the piston rod 307 is provided with a rotating groove 9, by arranging the rotating groove 9, the rotating groove 9 is integrally formed by a four-axis machining center, and the accuracy is improved.

[0028] Working principle: the device in use, first turn the clamping cylinder through the cylinder 1 reserved air inlet hole and air outlet hole, realize the piston rod assembly 3, the piston rod assembly 3, copper horizontal arm 308 rise and fall at the same time, under the action of guide pin column 202 in guide shaft sleeve assembly 2 and the rotary groove 9 of piston rod 307, 90° rotation is carried out simultaneously, the piston rod assembly 3 and copper horizontal arm 308 change from the original stretch down loose state to the shrinkage rotary rising state, conversely, the piston rod assembly 3, copper horizontal arm 308 change from the original shrinkage rotary rising state to the stretch down loose state, the continuous action changes its working state, through this way, it can reduce the manufacturing cost of rotary clamping cylinder for pneumatic seal cap and the application cost of seal cap, facilitate the relevant operation of on-site personnel, so as to promote the use.

[0029] It should be noted that in this document, relationship terms such as first and second are used only to differentiate one entity or action from another, and do not necessarily require or imply these entities or actions are in any such actual relationship or order. Also, the terms "comprises", "comprising", or any other variations thereof, are intended to cover non-exclusive inclusions, so that a process, method, article, or apparatus that comprises a list of elements does not only include those elements, but also includes other elements not expressly listed or inherent to such process, method, article, or apparatus. Without more limitations, the element defined by the statement "comprises a" does not exclude the presence of additional identical elements in the process, method, article, or apparatus that includes the element.

[0030] Although the embodiments of the present application have been shown and described, it should be understood by those skilled in the art that various changes, modifications, substitutions and variations can be made to these embodiments without departing from the principles and spirit of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A rotary clamping cylinder for a pneumatic sealing cap, comprising a cylinder barrel (1), characterized in that, Also includes: A guide bushing assembly (2) is provided at the bottom of the cylinder (1). The guide bushing assembly (2) includes a first O-ring (201) provided at the bottom of the cylinder (1). A guide bushing body (203) is provided on the outside of the first O-ring (201). A guide pin (202) is provided inside the guide bushing body (203). A first mounting hole (204) is provided inside the guide bushing body (203) to cooperate with the guide pin (202). The piston rod assembly (3) is located inside the guide bushing body (203). The piston rod assembly (3) includes a bottom pin (301) located inside the guide bushing body (203). A bottom plunger (305) is located on the outside of the bottom pin (301). A sliding ring (302), a second O-ring (303), and a magnetic ring (304) are located inside the bottom plunger (305).

2. The rotary clamping cylinder for a pneumatic sealing cap according to claim 1, characterized in that: The piston rod assembly (3) also includes a rubber gasket (306) disposed at the bottom of the bottom plunger (305), a piston rod (307) disposed at the bottom of the bottom plunger (305), a copper cross arm (308) disposed at the bottom of the piston rod (307), and an internal hex bolt (309) disposed inside the copper cross arm (308).

3. The rotary clamping cylinder for a pneumatic sealing cap according to claim 1, characterized in that: The cylinder (1) is provided with a set screw (4) inside, and a retaining ring (5) is provided inside the cylinder (1).

4. A rotary clamping cylinder for a pneumatic sealing cap according to claim 2, characterized in that: The bottom plunger (305) has a second mounting hole (6) inside that is used to cooperate with the bottom pin (301), and the piston rod (307) has a first screw hole (7) inside that is used to cooperate with the internal hex bolt (309).

5. A rotary clamping cylinder for a pneumatic sealing cap according to claim 2, characterized in that: The copper cross arm (308) has a second screw hole (8) inside for use with an internal hex bolt (309), and the piston rod (307) has a rotating groove (9) inside.

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