Self-tightening type sealing quick-opening structure used under high pressure

Abstract

The utility model discloses a self-tightening type sealing quick-opening structure used under high pressure, which comprises a barrel end part (1), a top cover (2), a pressure pad (3), a pressure ring (4), a triple ring (5) and a restraining ring (6), a restraining bolt (7) is screwed into the top cover (2) through the restraining ring (6), and in a pre-tightening state, the restraining bolt (7) enables pre-tightening sealing force to be generated among the pressure pad (3), the pressure ring (4), the top cover (2) and the barrel end part (1); when the internal pressure acts, the top cover (2) is jacked upwards to form self-tightening sealing; a safety interlocking device is further arranged. The quick-opening device is free of main bolt connection, the opening speed is high, and the pressure pad can be used repeatedly; under the condition of temperature and pressure fluctuation, the sealing performance is good, the reliability is high, and the use performance is good under high pressure; and each component is simple in structure, can be manufactured into a template according to the design size, can be produced in batches, and is easy to popularize and use.

Description

Technical Field

[0001] The utility model relates to the technical field of filter quick-opening structures, in particular to a self-tightening sealing quick-opening structure used under high pressure. Background Art

[0002] The filter is a very common fluid filtering and cleaning equipment in chemical plants. Since its key component, the filter element, needs to be frequently disassembled and replaced, the quick-opening structure is often used. The quick-opening structure is a mechanical device designed for quick opening and closing, and ensures the reliability of the sealing surface during the quick opening and closing process. Common quick-opening structures include clamp type, thread type, and tooth mesh type. However, high-pressure filters such as natural gas processing stations have higher requirements for quick-opening devices under the action of internal high pressure. The clamp-type quick-opening structure needs to tighten or loosen the bolts one by one to realize the opening and closing of the equipment. The opening and closing time of the equipment is long, and it is difficult to meet the requirements of quick opening. Under high pressure conditions, the sealing performance may be affected, and the reliability is relatively poor; the threaded quick-opening structure realizes the axial opening and closing of the cylinder and the head by rotating the screw sleeve. Under high pressure conditions, its structural strength and sealing performance reliability are insufficient; the tooth meshing quick-opening structure has a high pressure bearing capacity and good sealing, but it is difficult to process, and its sealing ring is more susceptible to wear under high pressure conditions. Utility Model Content

[0003] The purpose of the utility model is to overcome the defect of poor reliability of conventional quick-opening devices under high pressure in the prior art, to provide a self-tightening sealing quick-opening device used under high pressure, and to solve the problem of reliability and durability of the quick-opening device under high pressure.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A self-tightening sealing quick-opening device used under high pressure comprises a cylinder end, a top cover, a pressure pad, a pressure ring, a three-way ring and a check ring, wherein the top cover covers the cylinder end from above, the pressure pad is arranged above the joint between the top cover and the circumference of the cylinder end, the pressure ring is arranged above the pressure pad, the three-way ring is arranged above the pressure ring, the check ring is arranged above the outer side above the cylinder end, and the check bolt is screwed into the top cover through the check ring; in a pre-tightened state, the check bolt generates a pre-tightening sealing force between the pressure pad, the pressure ring, the top cover and the cylinder end; when internal pressure acts, the top cover is pushed upward to form a self-tightening seal; a safety interlocking device is also arranged above the three-way ring and the check ring.

[0006] The three-ring is a detachable three-ring structure, which is formed by splicing three ring plates into a ring shape. After being assembled, the safety interlock is used to achieve the purpose of locking.

[0007] The safety interlock device includes a safety interlock, a sealing gasket, and a fixing block. The safety interlock is in a "T" shape. The restraining ring is provided with a notch for installing the safety interlock. The safety interlock is fixed above the three-way ring through the fixing block. The lower end of the safety interlock is provided with a thread, which is screwed into the threaded hole of the top cover through the fixing block.

[0008] The self-tightening sealing quick-opening device is also provided with a top cover lifting device, including a hook, a handwheel and a lifting arm. The hook is provided with a trapezoidal thread, and the upper part is connected to the nut provided with the trapezoidal thread on the handwheel. The bottom is hook-shaped and fixedly connected to the center of the top cover. The lifting arm is used to fix the hook, and the handwheel is used to rotate the hook. The hook is raised and lowered through the transmission action of the trapezoidal thread, thereby realizing the lifting of the top cover.

[0009] Furthermore, the boom is in the shape of a "7", with reinforcing ribs provided at the bend and a sealing plate provided at one end; the hook is fixedly connected to the top cover through a hook bolt and a connecting plate; the upper part of the hook passes through a pad on the boom and is installed on the boom.

[0010] Furthermore, a sleeve is provided on the side of the end of the cylinder, the arm is inserted into the sleeve and can rotate, and the sleeve is fixed to the side of the end of the cylinder through connecting plate three, connecting plate four and pad two; connecting plate two is provided above the arm, and sealing plate two and rivets are provided at the bottom, which are used to limit the up and down movement of the arm after the arm is inserted into the sleeve.

[0011] The working principle of the utility model is as follows: the quick opening structure disclosed by the utility model adopts the cylinder end structure, and the pressure pad cooperates with the pressure ring as the sealing structure, and the check bolt is screwed into the top cover through the check ring. In the pre-tightened state, the check bolt is tightened to generate a pre-tightening sealing force between the pressure pad, the pressure ring, the top cover and the cylinder end. When the internal pressure acts, the sealing force interacting between them increases rapidly with the pressure increase, and the top cover is pushed up, and at the same time, part or even all of the load of the check bolt and the check ring is unloaded, forming a self-tightening seal. The upper part adopts a detachable three-ring structure, and the left and right two pieces are first installed in place, and then the last piece in the middle lower part is installed, and it is connected with the top cover through the thread on the safety interlock device, so as to achieve the purpose of limiting the displacement of the three-ring. When the quick opening structure is disassembled, the safety interlock device is first loosened, the check bolt and the check ring are removed, and the three-ring is gradually removed. The steps of removing the three-ring are opposite to those when installing, first taking the middle lower piece, and then taking the left and right pieces. Then, the hand wheel is turned to lift the hook with the help of the middle nut, so that the top cover rises step by step. When the top cover rises beyond the end of the cylinder, the top cover can be rotated with the crane arm.

[0012] Compared with the prior art, the beneficial effects of the utility model are:

[0013] 1. This quick-opening device has no main bolt connection, has a fast opening speed, and the pressure pad can be used multiple times;

[0014] 2. This quick-opening device has good sealing performance and high reliability under temperature and pressure fluctuations. It performs well under high pressure and can be used under pressure below 30Mpa.

[0015] 3. The components of the quick-opening device have simple structures and can be made into templates according to the designed dimensions. They can be mass-produced and are easy to promote and use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a cross-sectional structural schematic diagram of the main components of the utility model;

[0017] Figure 2 It is a three-dimensional schematic diagram of the utility model as a whole;

[0018] Figure 3 This is a schematic diagram of the top view structure of the utility model;

[0019] Figure 4 This is a schematic diagram of the front view structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the utility model being applied to a natural gas processing station.

[0021] In the figure: 1. end of the cylinder; 2. top cover; 3. pressure pad; 4. pressure ring; 5. three-in-one ring; 6. restraining ring; 7. restraining bolt; 8. hook bolt; 9. connecting plate 1; 10. hook; 11. sealing plate 1; 12. pad 1; 13. hand wheel; 14. lifting arm; 15. reinforcing rib; 16. connecting plate 2; 17. connecting plate 3; 18. casing; 19. connecting plate 4; 20. pad 2; 21. rivet; 22. sealing plate 2; 23. safety interlock; 24. sealing gasket; 25. fixing block. DETAILED DESCRIPTION

[0022] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0023] See also Figure 1-4The utility model discloses a self-tightening sealing quick-opening device used under high pressure, comprising a cylinder end 1, a top cover 2, a pressure pad 3, a pressure ring 4, a three-way ring 5 and a check ring 6, wherein the top cover 2 covers the cylinder end 1 at the top, the pressure pad 3 is arranged above the circumferential joint between the top cover 2 and the cylinder end 1, the pressure ring 4 is arranged above the pressure pad 3, the three-way ring 5 is arranged above the pressure ring 4, the check ring 6 is arranged on the outer side above the cylinder end 1, and the check bolt 7 is screwed into the top cover 2 through the check ring 6; in the pre-tightened state, the check bolt 7 generates a pre-tightening sealing force between the pressure pad 3, the pressure ring 4, the top cover 2 and the cylinder end 1; when the internal pressure acts, the top cover 2 is pushed upward to form a self-tightening seal; a safety interlocking device is also arranged above the three-way ring 5 and the check ring 6.

[0024] The three-ring 5 is a detachable three-ring structure, which is formed by splicing three ring plates into a ring shape. After being assembled, the safety interlock 23 is used to achieve the purpose of locking.

[0025] The safety interlock device includes a safety interlock 23, a sealing gasket 24, and a fixing block 25. The safety interlock 23 is in a "T" shape. The restraining ring 6 is provided with a notch for installing the safety interlock 23. The safety interlock 23 is fixed above the three-way ring 5 through the fixing block 25. The lower end of the safety interlock 23 is provided with a thread, which is screwed into the threaded hole of the top cover 2 through the fixing block 25.

[0026] Embodiment 1: The self-tightening sealing quick-opening device in this embodiment is also provided with a top cover lifting device, see Figure 2-4 , including a hook 10, a handwheel 13 and a boom 14, the hook 10 is provided with a trapezoidal thread, the upper part is connected to the nut provided with the trapezoidal thread on the handwheel 13, the bottom is hook-shaped, and is fixedly connected to the center of the top cover 2, the boom 14 is used to fix the hook 10, and the handwheel 13 is used to rotate the hook 10, and the hook 10 is lifted and lowered through the transmission action of the trapezoidal thread, thereby realizing the lifting of the top cover 2.

[0027] The boom 14 is in the shape of a "7", with a reinforcing rib 15 provided at the bend and a sealing plate 11 provided at one end; the hook 10 is fixedly connected to the top cover 2 through the provided hook bolt 8 and a connecting plate 9; the upper part of the hook 10 passes through a pad 12 on the boom 14 and is installed on the boom 14.

[0028] A sleeve 18 is provided on the side of the cylinder end 1, and the boom 14 is inserted into the sleeve 18 and can rotate. The sleeve 18 is fixed to the side of the cylinder end 1 through a connecting plate three 17, a connecting plate four 19, and a pad two 20; a connecting plate two 16 is provided above the boom 14, and a sealing plate two 22 and a rivet 21 are provided at the bottom, which are used to limit the up and down movement of the boom 14 after the boom 14 is inserted into the sleeve 18.

[0029] Example 2: See Figure 5 and Figure 4 The utility model is applied to a natural gas processing station as a quick-opening structure at the top of a natural gas processing filter, and its cylinder end 1 is connected to the cylinder of the natural gas processing filter as a whole. Its structure is the same as that of the first embodiment. In the implementation process, the specific components are selected as a sealing structure with a nylon 6 pressure pad and a pressure ring. The check bolt 7 is composed of a stud bolt M30×180 and a hexagonal nut, and the hook bolt is composed of a hexagonal bolt M30×120 and a hexagonal nut; the rivet 21 has a specification of ∅5, L=120, the sealing gasket 24 has a specification of ∅24 / ∅15, thickness=2.5, and the fixing block 25 has a thickness of 10.

[0030] The utility model is applied to natural gas processing stations, with reliable sealing, fast opening speed, and the pressure pad can be used multiple times. In the case of temperature and pressure fluctuations, the sealing performance is still good, and it performs well under high pressure. It can be used at pressures below 30Mpa, and has high sealing reliability. The structural dimensions and design calculations can be made into templates and can be mass-produced.

[0031] Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that various changes, modifications, substitutions and variations may be made to the embodiments without departing from the principles and spirit of the present invention, and that the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A self-tightening sealing quick-opening structure used under high pressure, characterized in that: The invention comprises a cylinder end (1), a top cover (2), a pressure pad (3), a pressure ring (4), a three-way ring (5) and a check ring (6), wherein the top cover (2) covers the cylinder end (1) at the top, the pressure pad (3) is arranged above the circumferential joint between the top cover (2) and the cylinder end (1), the pressure ring (4) is arranged above the pressure pad (3), the three-way ring (5) is arranged above the pressure ring (4), the check ring (6) is arranged above the cylinder end (1), and a check bolt (7) is screwed into the top cover (2) through the check ring (6); in a pre-tightened state, the check bolt (7) generates a pre-tightening sealing force between the pressure pad (3), the pressure ring (4), the top cover (2) and the cylinder end (1); when the internal pressure acts, the top cover (2) is pushed upward to form a self-tightening seal; a safety interlocking device is also arranged above the three-way ring (5) and the check ring (6).

2. The self-tightening sealing quick-opening structure used under high pressure according to claim 1, characterized in that: The three-ring (5) is a detachable three-ring structure, which is formed by splicing three ring plates into a ring shape; after being assembled, the safety interlock (23) is used to achieve the purpose of locking.

3. The self-tightening sealing quick-opening structure used under high pressure according to claim 2, characterized in that: The safety interlock device comprises a safety interlock (23), a sealing gasket (24), and a fixing block (25); the safety interlock (23) is in a "T" shape; the restraining ring (6) is provided with a notch for installing the safety interlock (23); the safety interlock (23) is fixed above the three-way ring (5) via the fixing block (25); a thread is provided at the lower end of the safety interlock (23) and is screwed into a threaded hole of the top cover (2) via the fixing block (25).

4. The self-tightening sealing quick-opening structure used under high pressure according to claim 1, characterized in that: The self-tightening sealing quick-opening device is also provided with a top cover lifting device, comprising a lifting hook (10), a hand wheel (13) and a lifting arm (14); the lifting hook (10) is provided with a trapezoidal thread, the upper portion of which is connected to a nut provided with a trapezoidal thread on the hand wheel (13); the bottom portion is hook-shaped and fixedly connected to the center of the top cover (2); the lifting arm (14) is used to fix the lifting hook (10); the hand wheel (13) is used to rotate the lifting hook (10); and the lifting hook (10) is lifted and lowered by the transmission action of the trapezoidal thread, thereby realizing the lifting of the top cover (2).

5. The self-tightening sealing quick-opening structure used under high pressure according to claim 4, characterized in that: The suspension arm (14) is in the shape of a letter "7", with a reinforcing rib (15) provided at the bend and a sealing plate (11) provided at one end; the suspension hook (10) is fixedly connected to the top cover (2) via a suspension hook bolt (8) and a connecting plate (9); the upper portion of the suspension hook (10) passes through a pad (12) on the suspension arm (14) and is mounted on the suspension arm (14).

6. The self-tightening sealing quick-opening structure used under high pressure according to claim 4, characterized in that: A sleeve (18) is provided on the side of the cylinder end (1), the boom (14) is inserted into the sleeve (18) and is rotatable, and the sleeve (18) is fixed to the side of the cylinder end (1) via a connecting plate three (17), a connecting plate four (19), and a backing plate two (20); a connecting plate two (16) is provided above the boom (14), and a sealing plate two (22) and a rivet (21) are provided at the bottom, which are used to limit the up and down movement of the boom (14) after the boom (14) is inserted into the sleeve (18).

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