Pressure vessel butt joint fixing structure

Abstract

The utility model discloses a pressure vessel butt joint fixing structure, and mainly relates to the field of chemical gas circuit equipment. Comprising an upper annular frame, a pull rod and an arc-shaped plate, the upper annular frame is used for surrounding the upper portion of a flange at the position of a pipe joint, the upper annular frame comprises two first semi-rings which are oppositely and symmetrically arranged, the first semi-rings are semicircular, the two ends of the two first semi-rings are detachably connected, a hinge position is arranged in the middle of each first semi-ring, and the two ends of each first semi-ring are hinged to the hinge position. The top end of the pull rod is rotationally connected with the hinge position, an n-shaped door-shaped frame is arranged at the bottom end of the pull rod, the arc-shaped plate is arched downwards and arranged below the door-shaped frame, and the bottom end of the door-shaped frame is fixed to the two sides of the arc-shaped plate. The utility model has the beneficial effect that the joint position of the horizontal storage tank connected to the main pipeline can be sealed and fixed in a reinforced manner.

Description

Technical Field

[0001] The utility model relates to the field of chemical gas line equipment, in particular to a pressure vessel docking and fixing structure. Background Art

[0002] In chemical processes, gases are often needed, such as ammonia, oxygen and other gases involved in the reaction, or nitrogen and other protective gases. These gases are usually stored in sealed pressure gas tanks. In specific production, in order to ensure a continuous and stable supply of gas sources, multiple storage tanks are usually connected in series or in parallel according to production needs, that is, multiple storage tanks are connected on a gas source pipeline to meet gas supply, buffering, standby and other needs.

[0003] Gas delivery often requires a certain pressure, and many gases need to be delivered in a sealed manner, so the sealing of the joints needs to be particularly vigilant. The current joints are sealed by traditional flange bolts (combined with washers). Since rubber and threads are inevitably attenuated, and chemical production often requires unified parking time according to scheduling, the maintenance of the sealing of the joints is relatively delayed, and it is impossible to intervene and strengthen in time, resulting in airtightness leakage becoming a difficult problem that is difficult to eliminate in time during production. Utility Model Content

[0004] The utility model aims to provide a pressure vessel docking and fixing structure, which can strengthen the sealing and fixing of the joint position of a horizontal storage tank connected to a main pipe.

[0005] In order to achieve the above purpose, the utility model is implemented through the following technical solutions:

[0006] A pressure vessel docking and fixing structure includes an upper annular frame, a pull rod, and an arc-shaped plate. The upper annular frame is used to enclose above the flange of the pipe joint position. The upper annular frame includes two first half rings that are relatively symmetrically arranged. The first half rings are semicircular. The two ends of the two first half rings are detachably connected. A hinge position is provided in the middle of the first half ring. The top end of the pull rod is rotatably connected to the hinge position. A "∩"-shaped portal frame is provided at the bottom end of the pull rod. The arc-shaped plate is arched downward and is arranged below the portal frame. The bottom end of the portal frame is fixed to both sides of the arc-shaped plate.

[0007] Upper ear plates extending upward and perpendicular to the first half ring are respectively provided at both ends of the first half ring, and a first stud bolt penetrates through the upper ear plates.

[0008] Folding plates extending outward are symmetrically provided at both ends of the bottom side of the portal frame, and two second stud bolts penetrate the folding plates. Edge plates connected to the arc-shaped plates with arc-shaped bends are provided on both sides of the arc-shaped plates, and corresponding mounting holes are provided on the edge plates corresponding to the positions of the second stud bolts.

[0009] A lower annular frame is provided below the upper annular frame, and the lower annular frame is used to enclose below the flange of the pipe joint position. The lower annular frame includes two symmetrical and oppositely arranged second half rings, and downwardly extending lower ear plates are respectively provided at both ends of the second half ring. A third stud bolt penetrates the lower ear plate, and a clearance groove for a pull rod to pass through is provided in the middle of the second half ring. The pull rod is a round rod, and a locking sleeve is threadedly connected to the pull rod, and a pressure plate is provided on the top of the locking sleeve.

[0010] The bottom of the locking sleeve is provided with convex blocks protruding outward along the radial line, the convex blocks are 2-4 in number and are distributed in an annular manner relative to the locking sleeve, and the convex blocks are penetrated by through holes.

[0011] Compared with the prior art, the beneficial effects of the present invention are:

[0012] The upper ring frame can be enclosed above the joint flange through two independent semi-ring components, so as to surround the upper pipe joint. By using the arc plate at the bottom of the horizontal storage tank, the pull rods on both sides are pulled downward, so that the upper ring frame presses the flange of the upper pipe joint downward, so that it presses down on the lower joint flange, thereby strengthening the external force fixation and improving the sealing effect. This structure can be flexibly selected for installation without parking or disassembly of the pipeline, so that loose connections can be reinforced in time to solve the sealing problem in time. BRIEF DESCRIPTION OF THE DRAWINGS

[0013] Figure 1 It is a schematic diagram of the utility model.

[0014] Figure 2 The utility model Figure 1 Schematic diagram of the upper part.

[0015] Figure 3 It is a side view of the utility model.

[0016] Figure 4 It is a front schematic diagram of the utility model.

[0017] Figure 5 It is a schematic diagram of the installation process of the utility model.

[0018] Numbers shown in the accompanying drawings:

[0019] 1. First half ring; 2. Upper ear plate; 3. First stud bolt; 4. Hinge position; 5. Pull rod; 6. Door frame; 7. Folding plate; 8. Second stud bolt; 9. Arc plate; 10. Edge plate; 11. Second half ring; 12. Lower ear plate; 13. Third stud bolt; 14. Clearance groove; 15. Locking sleeve; 16. Bump; 17. Through hole. DETAILED DESCRIPTION

[0020] The present invention is further described below in conjunction with specific embodiments. It should be understood that these embodiments are only used to illustrate the present invention and are not used to limit the scope of the present invention. In addition, it should be understood that after reading the content taught by the present invention, those skilled in the art can make various changes or modifications to the present invention, and these equivalent forms also fall within the scope defined by the present application.

[0021] Embodiment: A pressure vessel docking fixing structure

[0022] It is mainly used to strengthen the sealing and fixation of the joint position of the gas storage tank connected to the main pipeline. For the convenience of description, the storage tank and the gas pipeline are generally introduced as follows. It should be known that this part of the structure is not a feature of this structure, and this fixed structure can be used for various similar joint connection positions.

[0023] Usually, the gas pipeline includes a main line, on which a plurality of branch pipe joints are arranged, and a storage tank is arranged below the branch pipe joint. The storage tank is generally a round tank or an elliptical horizontal storage tank, and a gas outlet pipe joint is provided on the top of the storage tank. The top end of the gas outlet pipe joint and the bottom end of the branch pipe joint are respectively provided with flanges, and are sealed and fixed by flanges and bolts. A convex groove structure and a sealing ring can be provided between the flanges for encryption.

[0024] Based on the above common storage tank and pipe joint connection distribution, this fixed structure includes:

[0025] The upper annular frame includes two first half rings 1 which are arranged opposite to each other and can be detachably installed at the position of the pipe joint. The first half ring 1 is a semicircular ring component, and the inner ring of the first half ring 1 is larger than the diameter of the matched pipe joint, and the inner diameter of the first half ring 1 is smaller than the diameter of the matched pipe joint flange, so that it can be sleeved on the outside of the pipe joint and can be press-fitted with the flange at the butt joint of the pipe joint.

[0026] The two ends of the first half ring 1 are respectively provided with upper ear plates 2 extending upward and perpendicular to the first half ring 1 , and the upper ear plates 2 are penetrated by first stud bolts 3 , and the two first half rings 1 are locked and fixed by the first stud bolts 3 .

[0027] A hinge position 4 is provided in the middle of the first half ring 1, and a hinge shaft is provided on the hinge position 4. A pull rod 5 is hingedly installed on the hinge shaft. A portal frame 6 is provided at the bottom end of the pull rod 5 and welded and fixed thereto. The opening of the portal frame 6 forms a "∩" shape at the bottom, and folding plates 7 extending outwards are symmetrically provided at both ends of the bottom side of the portal frame 6. Two second stud bolts 8 are passed through the folding plate 7.

[0028] The two first half rings 1 are relatively symmetrically arranged, enclosing the outer periphery of the upper pipe joint, and are fixed by first stud bolts 3 of the upper ear plates 2 at both ends, so as to realize the installation cooperation of the upper annular frame above the joint flange.

[0029] Since the pull rod 5 is hinged, after the two first half rings 1 are installed and fixed above the flange at the joint position, the two portal frames 6 are swung downward so that the portal frames 6 straddle the storage tank. The size of the portal frame 6 is slightly looser than the storage tank, making it easy to swing and straddle.

[0030] There is also an arc plate 9 at the bottom of the tank, and the two sides of the arc plate 9 are provided with an edge plate 10 connected with the arc plate 9, and the edge plate 10 extends horizontally and the length direction of the edge plate 10 is consistent with the axial direction of the tank. The diameter of the arc plate 9 is larger than the diameter of the tank, and the inner peripheral surface of the arc plate 9 cooperates with the bottom surface of the tank, and the stress of the arc of the arc plate 9 is used to pull the pull rods 5 on both sides downward. The edge plate 10 is provided with corresponding mounting holes corresponding to the position of the second stud bolt 8, and the second stud bolt 8 passes through the mounting holes. The bottom end of the pull rod 5 is pressed against the edge plate 10 by the nuts at both ends, thereby completing the transmission of the downward force, and the upper annular frame composed of the two first half rings 1 is pulled downward to only press the top surface of the upper flange at the position of the pipe joint.

[0031] Under the above cooperation, since the pipe joint at the top of the storage tank is usually vertical, and the main line is mainly distributed above the storage tank, by pulling down the flange of the pipe joint docking with the storage tank, the two docking pipe joints are simply pressed together, and the force is transmitted to the bottom surface of the storage tank, which can provide effective support and achieve the effect of external tightening.

[0032] In order to further enhance the sealing effect, a lower annular frame may be added below the flange of the pipe joint. The structure of the lower annular frame is similar to that of the upper annular frame. The lower annular frame includes two symmetrically and oppositely arranged second half rings 11. The outer diameter and inner diameter of the second half ring 11 correspond to the outer diameter and inner diameter of the first half ring 1, respectively. The second half ring 11 is a semicircular annular sheet. The two ends of the second half ring 11 are respectively provided with lower ear plates 12 extending downward. A third stud bolt 13 penetrates the lower ear plate 12. The two second half rings 11 are combined into a lower annular frame through the third stud bolt 13 and are located below the flange of the joint.

[0033] A clearance groove 14 is provided in the middle of the second half ring 11 to provide space for the pull rod 5 . When the pull rod 5 is arranged upright, it is located in the clearance groove 14 .

[0034] The pull rod 5 is a round rod, and an external thread is provided on the outer wall of the pull rod 5 and a locking sleeve 15 is threadedly connected. A pressure plate is provided on the top of the locking sleeve 15. The locking sleeve 15 rotates with the pull rod 5, and the pressure plate is pressed on the second half ring 11. The compressive force is evenly transmitted upward through the second half ring 11, and the flange below the joint position and the upper flange are compressed to achieve two-way pressure tightening.

[0035] In order to facilitate the adjustment of the tightening of the locking sleeve 15 at any time, a lug 16 protruding outward along the radial line is provided at the bottom of the locking sleeve 15. The lugs 16 are three and are distributed in an annular manner relative to the locking sleeve 15. The lugs 16 are penetrated by a through hole 17. Through the through hole 17, hard tools, including iron rods, crowbars, etc., can be easily inserted into the through hole 17 to achieve labor-saving tightening, and the force arm can be flexibly used to strengthen the rotation force and save labor. At the same time, the structure of multiple arrays allows the lugs 16 to be exposed at any angle, which is convenient for coordinated operation.

Claims

1. A pressure vessel docking and fixing structure, characterized in that: It includes an upper annular frame, a pull rod, and an arc-shaped plate. The upper annular frame is used to enclose above the flange of the pipe joint position. The upper annular frame includes two first half rings that are relatively symmetrically arranged. The first half rings are semicircular. The two ends of the two first half rings are detachably connected. A hinge position is provided in the middle of the first half ring. The top end of the pull rod is rotatably connected to the hinge position. A "∩"-shaped portal frame is provided at the bottom end of the pull rod. The arc-shaped plate is arched downward and is arranged below the portal frame. The bottom end of the portal frame is fixed to both sides of the arc-shaped plate.

2. A pressure vessel docking and fixing structure according to claim 1, characterized in that: Upper ear plates extending upward and perpendicular to the first half ring are respectively provided at both ends of the first half ring, and a first stud bolt penetrates through the upper ear plates.

3. A pressure vessel docking and fixing structure according to claim 1, characterized in that: Folding plates extending outward are symmetrically provided at both ends of the bottom side of the portal frame, and two second stud bolts penetrate the folding plates. Edge plates connected to the arc-shaped plates with arc-shaped bends are provided on both sides of the arc-shaped plates, and corresponding mounting holes are provided on the edge plates corresponding to the positions of the second stud bolts.

4. A pressure vessel docking and fixing structure according to claim 1, characterized in that: A lower annular frame is provided below the upper annular frame, and the lower annular frame is used to enclose below the flange of the pipe joint position. The lower annular frame includes two symmetrical and oppositely arranged second half rings, and downwardly extending lower ear plates are respectively provided at both ends of the second half ring. A third stud bolt penetrates the lower ear plate, and a clearance groove for a pull rod to pass through is provided in the middle of the second half ring. The pull rod is a round rod, and a locking sleeve is threadedly connected to the pull rod, and a pressure plate is provided on the top of the locking sleeve.

5. A pressure vessel docking and fixing structure according to claim 4, characterized in that: The bottom of the locking sleeve is provided with convex blocks protruding outward along the radial line, the convex blocks are 2-4 in number and are distributed in an annular manner relative to the locking sleeve, and the convex blocks are penetrated by through holes.

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