Eccentric structure facilitating disassembly and assembly of valve cover

Abstract

The eccentric structure comprises a valve body and the valve deck, a first guide hole is formed in the valve body, a second guide hole is formed in the valve deck, the second guide hole communicates with the first guide hole, a connecting assembly is arranged between the valve body and the valve deck in a sliding mode, and the valve deck is connected with the connecting assembly. The connecting assembly comprises a first rod capable of being installed in the first guide hole, a second rod integrally formed at one end of the first rod and a third rod integrally formed at the end, away from the first rod, of the second rod, the second rod can be installed in the second guide hole, the second rod is eccentrically arranged, and the second rod is sleeved with an eccentric wheel. The outer wall of the eccentric wheel can be in tangent fit with the inner wall of the second guide hole, a locking nut is arranged at the end, away from the first rod, of the eccentric wheel and arranged on the outer wall of the third rod in a sleeving mode, and a limiting assembly is arranged on the locking nut. The problems that when the valve deck is disassembled and assembled, the valve deck is in an unbalanced state of transverse movement, so that the sealing face is collided, and the fluid leakage risk is increased are solved.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of maintenance assistance, in particular to an eccentric structure facilitating disassembly and assembly of a valve cover. BACKGROUND

[0002] The valve cover and the valve body are two important components in the valve, and the valve cover and the valve body work together to ensure that the valve can effectively control the direction, pressure and flow of fluid. When performing maintenance, maintenance and other work, the valve cover needs to be disassembled from the valve body. A lifting hole is formed in the valve cover. A lifting hook is connected to the lifting hole in the valve cover. A lifting belt is connected to the lifting hook. A crane is used to lift the lifting belt. At this time, the valve cover is separated from the valve body, and the disassembly of the valve cover is realized. When the valve cover needs to be installed on the valve body, the same method is used to lift the valve cover with the crane, so that the valve cover moves horizontally and is reset.

[0003] In the related technology in the above, the inventor believes that the following defects exist: Because the lifting belt has tension and the valve cover is heavy, it is difficult to ensure that the valve cover is in a balanced state during disassembly and assembly of the valve cover, which may cause misalignment between the valve cover and the valve body, and the sealing surface in contact with the valve cover and the valve body may be scratched or bumped, resulting in a decrease in the sealing performance of the valve and an increase in the risk of fluid leakage. CONTENT OF THE UTILITY MODEL

[0004] In order to solve the problem that it is difficult to ensure that the valve cover is in a balanced state during disassembly and assembly of the valve cover, which may cause misalignment between the valve cover and the valve body, and the sealing surface in contact with the valve cover and the valve body may be scratched or bumped, resulting in a decrease in the sealing performance of the valve and an increase in the risk of fluid leakage, the application provides an eccentric structure facilitating disassembly and assembly of a valve cover.

[0005] The eccentric structure facilitating disassembly and assembly of the valve cover provided by the application adopts the following technical scheme:

[0006] An eccentric structure facilitating disassembly and assembly of a valve cover, comprising a valve body, a valve cover which can be installed on the valve body, a plurality of first guide holes formed in the valve body, a plurality of second guide holes formed in the valve cover, the second guide holes being in communication with the first guide holes, a connecting assembly arranged between the valve body and the valve cover, the connecting assembly comprising a first rod which can be installed in the first guide hole, a second rod integrally formed at one end of the first rod, a third rod integrally formed at an end of the second rod away from the first rod, the second rod being installable in the second guide hole, the second rod being arranged eccentrically, an eccentric wheel being sleeved on the outer wall of the second rod, the outer wall of the eccentric wheel being capable of forming a tangent fit with the inner wall of the second guide hole, a locking nut being arranged at an end of the eccentric wheel away from the first rod, the locking nut being sleeved on the outer wall of the third rod, and a limiting assembly being arranged on the locking nut.

[0007] By adopting the technical scheme, when the bonnet needs to be detached from the valve body, the first rod is first installed in the first guide hole, the eccentric wheel is then installed on the second rod, the eccentric wheel is rotated so that the outer wall of the eccentric wheel is tangent to the inner wall of the second guide hole, and then the locking nut is installed on the third rod, at this time, the locking nut is in abutment with the eccentric wheel and is fixed, so that the outer wall of the eccentric wheel and the inner wall of the second guide hole are always in a tangent state, and then the bonnet is lifted by the crane through the lifting hole on the top of the bonnet, so that the bonnet moves transversely along the axial direction of the eccentric wheel, at this time, the bonnet is separated from the valve body, when the bonnet needs to be reinstalled on the valve body, the dismounting and reinstalling device is installed on the bonnet, the bonnet is lifted by the crane and moves along the axial direction of the eccentric wheel, so that the first rod is installed and fixed in the first guide hole, at this time, the bonnet is reinstalled on the valve body, and in this way, the balance of the transverse movement of the bonnet can be ensured when the bonnet is detached and installed, the sealing surface of the bonnet in contact with the valve body is protected, and the sealing performance of the valve is improved.

[0008] Optionally, the limiting assembly comprises a positioning groove formed on the outer wall of the locking nut and a limiting plate clamped in the positioning groove.

[0009] By adopting the technical scheme, the limiting plate is clamped on the positioning groove during use, so that safety accidents caused by the separation of the bonnet can be prevented, and the safety during the dismounting and mounting of the bonnet is improved.

[0010] Optionally, a pad sleeve is arranged between the second rod and the second guide hole, the pad sleeve is clamped between the first rod and the eccentric wheel, and the pad sleeve is arranged concentrically.

[0011] By adopting the technical scheme, the length of the eccentric wheel can be reduced by arranging the pad sleeve, and the machining cost of the eccentric wheel is reduced.

[0012] Optionally, a square protruding block is arranged at the end of the third rod away from the first rod.

[0013] By adopting the technical scheme, the first rod is installed and fixed by manually rotating the square protruding block during use, and the square protruding block can facilitate the installation of the first rod.

[0014] Optionally, the second rod and the eccentric wheel are arranged with an eccentricity of 1 mm.

[0015] By adopting the technical scheme, the second rod is first installed, and then the eccentric wheel is installed on the outer side of the second rod during use, the outer wall of the eccentric wheel is tangent to the inner wall of the second guide hole by rotating the eccentric wheel, so that the bonnet moves along the axial direction of the eccentric wheel, and the eccentricity reduces the alignment difficulty in the installation process, reduces the complexity of manual operation, and improves the work efficiency.

[0016] Optionally, a guide slope is formed on the outer wall of the locking nut.

[0017] By adopting the above technical scheme, when the valve cover is reset, the valve cover can be moved towards the valve body by the side wall of the guide slope, the reset of the valve cover is realized, and the stability and safety of installation are improved.

[0018] Optionally, an annular groove is formed on one end of the eccentric wheel close to the locking nut, and a plurality of clamping grooves are formed on the side wall of the annular groove.

[0019] By adopting the above technical scheme, the annular groove and the clamping groove are arranged to facilitate the rotation of the eccentric wheel, so that the eccentric wheel and the second rod generate an eccentric effect, thereby realizing the safe separation of the valve cover from the valve body.

[0020] Optionally, a crescent wrench is arranged on the eccentric wheel, one end of the crescent wrench is integrally formed with a clamping head, and the clamping head can be clamped on the clamping groove.

[0021] By adopting the above technical scheme, the clamping head is clamped on the clamping groove by using the crescent wrench, and then the eccentric wheel is rotated so that the outer wall of the eccentric wheel is tangent to the inner wall of the second guide hole.

[0022] In summary, the present application has at least one of the following beneficial technical effects:

[0023] 1. When the valve cover needs to be detached from the valve body, the first rod is first installed in the first guide hole, the eccentric wheel is then installed on the second rod, the eccentric wheel is rotated so that the outer wall of the eccentric wheel is tangent to the inner wall of the second guide hole, and then the locking nut is installed on the third rod, at this time the locking nut is in abutment with the eccentric wheel and is fixed, which can ensure that the outer wall of the eccentric wheel and the inner wall of the second guide hole are always in a tangent state, and then the crane lifts the valve cover through the lifting hole at the top of the valve cover, so that the valve cover moves transversely along the axial direction of the eccentric wheel, at this time the valve cover is separated from the valve body, when the valve cover needs to be reset and installed on the valve body, the dismounting and resetting device is installed on the valve cover, and then the crane lifts the valve cover and moves along the axial direction of the eccentric wheel, so that the first rod is installed and fixed in the first guide hole, at this time the valve cover is reset and installed on the valve body, and by this way the valve cover can be kept in a balanced state of transverse movement when the valve cover is dismounted and installed, the sealing surface of the valve cover and the valve body is protected, and the sealing performance of the valve is improved.

[0024] 2. When in use, the limiting plate is clamped on the positioning groove, which can prevent safety accidents caused by the separation of the valve cover and improve the safety when the valve cover is dismounted and installed.

[0025] 3. The second rod is installed first, then the eccentric wheel is installed outside the second rod, the eccentric wheel is rotated to make the outer wall of the eccentric wheel tangent to the inner wall of the second guide hole, so that the valve cover moves along the axial direction of the eccentric wheel, the eccentricity reduces the alignment difficulty in the installation process, reduces the complexity of manual operation, and improves the work efficiency. BRIEF DESCRIPTION OF DRAWINGS

[0026] In order to more clearly illustrate the technical solutions in the embodiments of the present application, the drawings needed to be used in the embodiment description will be briefly introduced. Obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can also be obtained by those skilled in the art without creative labor.

[0027] Figure 1 is a schematic diagram of the overall structure of the eccentric structure convenient for disassembling and assembling the valve cover.

[0028] Figure 2 is a sectional view of the eccentric structure convenient for disassembling and assembling the valve cover.

[0029] Figure 3 is an exploded view of the eccentric structure convenient for disassembling and assembling the valve cover.

[0030] Figure 4 is a schematic diagram of the structure of the eccentric wheel in the embodiment of the present application.

[0031] The drawings are as follows: 1, valve body; 2, valve cover; 3, first guide hole; 4, second guide hole; 5, connecting assembly; 6, first rod; 7, second rod; 8, third rod; 9, eccentric wheel; 10, locking nut; 11, limiting assembly; 12, positioning groove; 13, limiting plate; 14, pad sleeve; 15, square protruding block; 16, guide inclined surface; 17, annular groove; 18, clamping groove; 19, crescent wrench; 20, clamping head. DETAILED DESCRIPTION

[0032] The following will be described in combination with the drawings Figures 1-4 The present application will be further described in detail.

[0033] The present application discloses an eccentric structure convenient for disassembling and assembling the valve cover.

[0034] Reference Figure 1 and Figure 2 The disassembling and assembling reset device comprises a valve body 1 and a valve cover 2, a plurality of first guide holes 3 are circumferentially arranged on the end face of the valve body 1, a plurality of second guide holes 4 are circumferentially arranged on the end face of the valve cover 2, the second guide holes 4 are communicated with the first guide holes 3, and the valve cover 2 is fixed on the valve body 1 by using bolts.

[0035] Reference Figure 3Because it is difficult to ensure that the valve cover 2 is in a balanced state of transverse movement when disassembling and installing the valve cover 2, the valve cover 2 and the valve body 1 are misaligned, and the sealing surface in contact between the valve cover 2 and the valve body 1 is scratched or bumped, so the embodiment is provided with a connecting assembly 5 between the valve body 1 and the valve cover 2, the connecting assembly 5 is provided with two, the connecting assembly 5 includes a first rod 6, a second rod 7 and a third rod 8, the first rod 6 can be installed in the first guide hole 3, the second rod 7 is integrally formed at one end of the first rod 6, the third rod 8 is integrally formed at one end of the second rod 7 away from the first rod 6, the diameters of the first rod 6, the second rod 7 and the third rod 8 gradually decrease, the second rod 7 is eccentric by 1mm, the second rod 7 can be installed in the second guide hole 4, the third rod 8 is provided with a square protruding block 15 at one end away from the first rod 6, and the installation and fixation of the first rod 6 are realized by manually rotating the square protruding block 15.

[0036] With reference to Figure 2 , Figure 3 , Figure 4 , in order to reduce the difficulty of alignment in the installation process, an eccentric wheel 9 is sleeved on the outer wall of the second rod 7, the eccentric wheel 9 is eccentric by 1mm, because the second rod 7 is also eccentric by 1mm, when the eccentric wheel 9 is rotated, the outer wall of the eccentric wheel 9 can be tangent to the inner wall of the second guide hole 4, so that the valve cover 2 can move transversely along the axial direction of the eccentric wheel 9. An annular groove 17 is formed at one end of the eccentric wheel 9 away from the first rod 6, in order to facilitate the rotation of the eccentric wheel 9 and generate an eccentric effect between the eccentric wheel 9 and the second rod 7, a plurality of clamping grooves 18 are formed in the side wall of the annular groove 17, and a crescent wrench is arranged on the eccentric wheel 9, one end of the crescent wrench is integrally formed with a clamping head 20, and the rotation of the eccentric wheel 9 is realized by clamping the clamping head 20 in the clamping groove 18. In order to reduce the length of the eccentric wheel 9 and reduce the processing cost of the eccentric wheel 9, a pad sleeve 14 is arranged between the second rod 7 and the second guide hole 4, and the pad sleeve 14 is concentrically arranged.

[0037] With reference to Figure 3 , a locking nut 10 is arranged at one end of the eccentric wheel 9 away from the first rod 6, the locking nut 10 is a special M30 locking nut 10, which can withstand large tension and shear force, the locking nut 10 is sleeved on the outer wall of the third rod 8, the locking nut 10 is in abutting and fixed connection with the eccentric wheel 9, so that the outer wall of the eccentric wheel 9 and the inner wall of the second guide hole 4 are always in a tangent state. In order to facilitate the installation and reset of the valve cover 2, a guide inclined surface 16 is formed in the outer wall of the locking nut 10, when the installation and reset of the valve cover 2 is performed, the valve cover 2 can be moved towards the valve body 1 by the side wall of the guide inclined surface 16, the installation and reset of the valve cover 2 is realized, and the stability and safety of the installation are improved.

[0038] With reference to Figure 3Since the valve cover 2 is heavy, the moving range is large, and a safety accident may occur when it is separated, therefore, the embodiment sets a limiting assembly 11 between the two locking nuts 10, the limiting assembly 11 comprises a positioning groove 12 and a limiting plate 13, the positioning groove 12 is arranged on the outer wall of the locking nut 10, the limiting plate 13 is square-shaped, two mounting grooves are arranged on the limiting plate 13 and are clamped and fixed in the two positioning grooves 12 respectively, and the limiting plate 13 is clamped between the valve cover 2 and the locking nut 10, thereby improving the safety when the valve cover 2 is disassembled.

[0039] The implementation principle of the eccentric structure facilitating the disassembly and assembly of the valve cover is as follows: when the valve cover 2 needs to be disassembled from the valve body 1, first, the two first rods 6 are respectively arranged in the two first guide holes 3, then the bushing 14 is arranged on the second rod 7, and then the eccentric wheel 9 is arranged on the end of the bushing 14 away from the first rod 6, the eccentric wheel 9 is rotated by using a crescent wrench, so that the outer wall of the eccentric wheel 9 is tangent to the inner wall of the second guide hole 4, then the locking nut 10 is arranged on the third rod 8, so that the locking nut 10 abuts against the eccentric wheel 9 and fixes the position of the eccentric wheel 9, then the limiting plate 13 is arranged, the valve cover 2 is horizontally translated and separated from the disassembly and assembly device through the connection of the lifting hole on the top of the valve cover 2 and the lock, and then the limiting plate 13 is removed, so that the valve cover 2 can be horizontally translated and separated from the disassembly and assembly device, thereby realizing the safe separation of the valve cover 2 from the valve body 1; when the valve cover 2 needs to be repositioned and arranged on the valve body 1, the valve cover 2 is horizontally slid to the valve body 1 by means of the guide inclined surface 16, until the valve cover 2 is repositioned to the position before disassembly, and then the valve cover 2 is fixed and arranged on the valve body 1.

[0040] Unless otherwise defined, technical terms or scientific terms used in the present application shall be understood as the common meaning understood by a person with ordinary skills in the art to which the present application belongs. The terms "first", "second", "third" and the like used in the specification and claims of the present application do not represent any order, number or importance, but are only used to distinguish different components. The terms "one" or "a" and the like do not represent a quantity limitation, but represent the existence of at least one. The terms "including", "containing" and the like mean that the elements or objects appearing before the "including" or "containing" cover the elements or objects listed after the "including" or "containing" and their equivalents, and do not exclude other elements or objects. The terms "upper", "lower", "left", "right" and the like are only used to represent relative positional relationships, and when the absolute positions of the described objects are changed, the relative positional relationships may also be changed accordingly.

[0041] The above are preferred embodiments of the present application, which do not limit the protection scope of the present application, therefore: any equivalent changes made on the structure, shape and principle of the present application shall be covered within the protection scope of the present application.

Claims

1. An eccentric structure for easy valve cover assembly and disassembly, comprising a valve body (1) and a valve cover (2) mountable on the valve body (1), characterized in that: The valve body (1) has several first guide holes (3), and the valve cover (2) has several second guide holes (4) that pass through it. The second guide holes (4) are connected to the first guide holes (3). A connecting assembly (5) is provided between the valve body (1) and the valve cover (2). The connecting assembly (5) includes a first rod (6) that can be installed in the first guide hole (3), a second rod (7) integrally formed at one end of the first rod (6), and a part integrally formed on the second rod (7) away from the first rod (6). The third rod (8) at one end, the second rod (7) can be installed in the second guide hole (4), the second rod (7) is eccentrically arranged, and an eccentric wheel (9) is sleeved on the outer wall of the second rod (7). The outer wall of the eccentric wheel (9) can form a tangential fit with the inner wall of the second guide hole (4). A locking nut (10) is provided at the end of the eccentric wheel (9) away from the first rod (6). The locking nut (10) is sleeved on the outer wall of the third rod (8), and a limit component (11) is provided on the locking nut (10).

2. The eccentric structure for easy valve cover assembly and disassembly according to claim 1, characterized in that: The limiting component (11) includes a positioning groove (12) formed on the outer wall of the locking nut (10) and a limiting plate (13) snapped into the positioning groove (12). The limiting plate (13) is held between the valve cover (2) and the locking nut (10).

3. The eccentric structure for easy valve cover assembly and disassembly according to claim 1, characterized in that: A sleeve (14) is provided between the second rod (7) and the second guide hole (4). The sleeve (14) is clamped between the first rod (6) and the eccentric wheel (9). The sleeve (14) is concentrically arranged.

4. The eccentric structure for easy valve cover assembly and disassembly according to claim 1, characterized in that: The third rod (8) has a square protrusion (15) at the end away from the first rod (6).

5. The eccentric structure for easy valve cover assembly and disassembly according to claim 1, characterized in that: The second rod (7) and the eccentric wheel (9) are both set eccentrically by 1mm.

6. The eccentric structure for easy valve cover assembly and disassembly according to claim 1, characterized in that: A guide slope (16) is provided on the outer wall of the locking nut (10).

7. The eccentric structure for easy valve cover assembly and disassembly according to claim 1, characterized in that: The eccentric wheel (9) has an annular groove (17) at one end near the locking nut (10), and a plurality of slots (18) are provided on the side wall of the annular groove (17).

8. The eccentric structure for easy valve cover assembly and disassembly according to claim 7, characterized in that: The eccentric wheel (9) is provided with a crescent wrench (19), one end of which is integrally formed with a clamp head (20), which can be engaged with the clamp slot (18).

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