Valve packing sealing structure

Abstract

The utility model relates to the technical field of valves, and provides a valve packing sealing structure which comprises a valve body and a connecting flange, the valve body and the connecting flange are attached to each other, a plugging gland is connected into the valve body in an inserted mode, an inner opening of the valve body is provided with an inserting groove, and the inserting groove is communicated with the plugging gland. A plugging gland is arranged in the valve body, an inserting groove is formed in the plugging gland, a sliding inserting plate is connected into the inserting groove in an inserted mode, the sliding inserting plate is fixedly connected with the outer surface of the plugging gland, and a rotating adjusting groove is formed in the sliding inserting plate. And through arrangement of a rotating ring and a rotating transverse insertion block, the rotating ring and the rotating transverse insertion block can rotate by rotating an L-shaped steering rod, so that the rotating transverse insertion block can be rotationally inserted into a limiting transverse groove for limiting, and the longitudinal position of a sliding insertion plate is limited.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a valve packing sealing structure. Background Art

[0002] Valves are pipeline accessories used to open and close pipelines, control flow direction, and adjust and control the parameters (temperature, pressure, and flow) of the conveying medium. According to their functions, they can be divided into shut-off valves, check valves, regulating valves, etc. Valves are control components in fluid conveying systems and have functions such as shut-off, regulation, diversion, prevention of backflow, pressure stabilization, diversion, or overflow pressure relief.

[0003] After searching, the existing patent (CN109595387B) discloses a valve packing sealing structure, including a valve body, a valve stem, a valve cover, a gland, and a packing assembly; the upper end face of the valve body is provided with a first flange, the lower end face of the valve cover is provided with a second flange, the fastener passes through the first flange, the second flange, and the valve body and the valve cover are threadedly connected; the valve stem passes through the valve cover and the valve body; a packing cavity is provided between the valve stem and the valve body, and a packing assembly is provided in the packing cavity; the packing assembly is sleeved on the valve stem; a gland is provided above the packing assembly, the lower end face of the gland abuts against the upper end face of the packing assembly, the gland is installed on the upper end face of the valve cover by bolts, a spring is provided between the gland and the valve cover, and the spring is sleeved on the bolts; a scale is provided on the upper end face of the valve cover; the utility model provides a scale by setting a scale Reasonably control the compression amount of the packing assembly to avoid the packing assembly being compressed too loosely, causing leakage of the valve medium at the packing, and to avoid being compressed too tightly, causing excessive friction between the valve stem and the packing, resulting in difficulty in opening and closing the valve; multiple seals are formed by the upper packing group, the middle packing group, and the lower packing group to improve the sealing performance of the packing, thereby improving the reliability and sealing of the valve; the reliability of the seal is further improved by the structure of the first packing ring, the second packing ring, and the third packing ring, and the annular inclined surface is used to convert the vertical compression force of the gland into axial force and radial force, thereby increasing the deformation of the packing group and making the packing group pressed against the valve stem; the reliability of the seal is further improved by the O-rings in the first annular protrusion and the second annular protrusion.

[0004] However, in the above solution, the fixing structure between the upper and lower flanges and between the gland and the flange is relatively simple. Once the fasteners fall off, the sealing of the packing is easily affected, and there is a lack of protection for the fasteners.

[0005] In view of this, the utility model proposes a valve packing sealing structure. Utility Model Content

[0006] The utility model proposes a valve packing sealing structure, which solves the problem in the related art that the fixing structure between the upper and lower flanges and between the gland and the flange is relatively simple, once the fasteners fall off, the sealing performance of the packing is easily affected, and there is a lack of protection for the fasteners.

[0007] The technical solution of the utility model is as follows: a valve packing sealing structure, comprising a valve body and a connecting flange: the valve body and the connecting flange are fitted with each other, the interior of the valve body is plugged and connected with a sealing cover, the inner opening of the valve body is provided with a slot, the interior of the slot is plugged and connected with a sliding plug plate, the sliding plug plate is fixedly connected to the outer surface of the sealing cover, the interior of the sliding plug plate is provided with a rotation adjustment groove, the interior of the rotation adjustment groove is plugged and connected with an L-shaped steering rod, one side of the inner opening of the valve body is provided with an annular steering groove, the interior of the annular steering groove is fitted and rotated with a rotating ring, the L-shaped steering rod is fixedly connected to the rotating ring, a first screw is provided between one side of the L-shaped steering rod and the outer wall of the valve body, the L-shaped steering rod and the valve body are fixedly connected by the first screw, the inner opening of the rotating ring is equidistantly fixed with a plurality of rotating transverse plug blocks, and a limited transverse groove is provided on the outer side of the sliding plug plate. The cam is secured to the interior of the valve body and is secured to the interior of the valve stem by a secure connection between the cam and the valve stem.

[0008] Preferably, the sliding plug plate is inserted into the interior of the slot to slide up and down, and there are multiple sliding plug plates, which are evenly distributed on the outer surface of the valve body.

[0009] Preferably, the rotating ring is half the width of the annular steering groove, the rotating cross-insertion block is adapted to rotate inside the annular steering groove, and the rotating ring closes the rotating adjustment groove.

[0010] Preferably, there are a plurality of rotating transverse inserting blocks, and the number of the rotating transverse inserting blocks is equal to the number of the sliding inserting plates.

[0011] Preferably, the top of the rectangular plug is fixedly connected to a limit plate, and the rectangular plug passes through the interior of the valve body and the connecting flange from top to bottom. The rectangular plug can be limited by the provided limit plate.

[0012] Preferably, there are multiple threaded rods, and the multiple threaded rods are inserted into the upper and lower sides of the rectangular plug rod. The number of threaded rods arranged inside the valve body and the connecting flange is the same as the number of rectangular plug rods.

[0013] Preferably, the fixing mechanism includes a fixing ring 1, a second screw and a connecting block, the other end of the upper fixing ring 2 is fixedly connected to the fixing ring 1, the other end of the fixing ring 1 is fixedly connected to the connecting block, the fixing ring 1 fits the edge of the top of the valve body, and second screws are provided between the upper and lower fixing rings 1 and the valve body and the connecting flange. The upper and lower fixing rings 1 are rotatably connected to the valve body and the connecting flange respectively through the second screws, and the connecting blocks on both sides fit the edges of the valve body and the connecting flange respectively, and the threaded rod can be limited by the provided fixing ring 2 to prevent the threaded rod from detaching and leaking.

[0014] Preferably, the interior of the fixing ring 2 on both sides is fixedly connected with a magnetic block, and the magnetic blocks inside the fixing ring 2 on both sides attract each other. The set magnetic blocks can fix the fixing ring 2, realize double positioning of the fixing ring 2, and protect the threaded rod.

[0015] The beneficial effects of the utility model are:

[0016] The utility model can limit the lateral rotation of the sealing cover after it is inserted into the valve body by providing a slot and a sliding insert. By providing a rotating ring and a rotating transverse insert, the rotating ring and the rotating transverse insert can be rotated by rotating the L-shaped steering rod, so that the rotating transverse insert can be rotated and inserted into the interior of the limiting transverse groove for limiting the longitudinal position of the sliding insert.

[0017] In the utility model, the rectangular plug rod can be limited by the provided limiting plate, the threaded rod can be limited by the provided fixing ring 2 to prevent the threaded rod from detaching and leaking, and the fixing ring 2 can be fixed by the provided magnetic block to achieve dual positioning of the fixing ring 2 and protect the threaded rod. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] The present invention will be further described in detail below with reference to the accompanying drawings and specific implementation methods.

[0019] Figure 1 This is a schematic diagram of the three-dimensional structure of the utility model from a top view;

[0020] Figure 2 This is a schematic diagram of the three-dimensional structure of the utility model when viewed from above;

[0021] Figure 3 This is a schematic diagram of the internal structure of the utility model from a top view;

[0022] Figure 4 This is a schematic diagram of the internal structure of the utility model from the side;

[0023] Figure 5 For this utility model Figure 1 Schematic diagram of the enlarged structure at A in the middle;

[0024] Figure 6 For this utility model Figure 3 Schematic diagram of the enlarged structure at B in the middle;

[0025] Figure 7 For this utility model Figure 4 Schematic diagram of the enlarged structure at C in the middle;

[0026] Figure 8 For this utility model Figure 4 Schematic diagram of the enlarged structure at point D in the middle.

[0027] In the figure: 1. Valve body; 2. Connecting flange; 3. Sealing cover; 4. Slot; 5. Sliding plate; 6. Rotation adjustment slot; 7. L-shaped steering rod; 8. Annular steering slot; 9. Rotation ring; 10. Rotation cross insert; 11. First screw; 12. Limit plate; 13. Rectangular insert; 14. Threaded rod; 15. Fixed ring 1; 16. Second screw; 17. Connecting block; 18. Fixed ring 2; 19. Magnetic block; 20. Limit cross slot. DETAILED DESCRIPTION

[0028] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention. Example 1

[0029] A preferred embodiment of a valve packing sealing structure provided by the utility model is as follows Figures 1 to 8As shown: a valve packing sealing structure, including a valve body 1 and a connecting flange 2: the valve body 1 and the connecting flange 2 are fitted together, the valve body 1 is internally plugged and connected with a blocking cover 3, the inner opening of the valve body 1 is provided with a slot 4, the inner plugging connection of the slot 4 is provided with a sliding plug plate 5, the sliding plug plate 5 is fixedly connected to the outer surface of the blocking cover 3, the inner portion of the sliding plug plate 5 is provided with a rotation adjustment groove 6, the inner portion of the rotation adjustment groove 6 is plugged and connected with an L-shaped steering rod 7, one side of the inner opening of the valve body 1 is provided with an annular steering groove 8, the inner portion of the annular steering groove 8 is fitted and rotated with a rotating ring 9, the L-shaped steering rod 7 is fixedly connected to the rotating ring 9, a first screw 11 is provided between one side of the L-shaped steering rod 7 and the outer wall of the valve body 1, the L-shaped steering rod 7 and the valve body 1 are fixedly connected by the first screw 11 is fixedly connected, a plurality of rotating transverse plug blocks 10 are equidistantly fixedly connected to the inner mouth of the rotating ring 9, and a limiting transverse groove 20 is provided on the outer side of the sliding insert plate 5. The rotating transverse plug block 10 is adapted to be rotatably inserted into the inside of the limiting transverse groove 20, and the interior of the valve body 1 and the connecting flange 2 is plugged into a rectangular plug rod 13. The sides of the valve body 1 and the connecting flange 2 are plugged into a threaded rod 14, which passes through one side of the valve body 1 and is plugged into the inside of the rectangular plug rod 13. The sides of the valve body 1 and the connecting flange 2 are both sleeved with a fixing ring 2 18, which covers the threaded rod 14. The top of the upper fixing ring 2 18 and the bottom of the lower fixing ring 2 18 are both provided with a fixing mechanism, and the fixing mechanisms on both sides are mirror-imaged with the contact surface of the valve body 1 and the connecting flange 2 as the axis.

[0030] It should be noted that the existing packing sealing structure still has certain shortcomings. It can only be fixed by a relatively single fastener. The fixing structure between the upper and lower flanges and between the pressure cover and the flange is relatively simple. Once the fastener falls off, it is easy to affect the sealing of the packing, and there is a lack of protection for the fastener.

[0031] In this embodiment, the slot 4 and the sliding insert 5 are provided to limit the lateral rotation after the sealing cover 3 is inserted into the valve body 1. The rotating ring 9 and the rotating transverse insert 10 are provided, and the rotating ring 9 and the rotating transverse insert 10 can be rotated by rotating the L-shaped steering rod 7, so that the rotating transverse insert 10 can be rotated and inserted into the interior of the limiting transverse groove 20 for limiting the sliding insert 5, thereby limiting the longitudinal position of the sliding insert 5.

[0032] In a further preferred embodiment of the present invention, the sliding plate 5 is inserted into the slot 4 to slide up and down. There are multiple sliding plates 5 , and the multiple sliding plates 5 are evenly distributed on the outer surface of the valve body 1 .

[0033] In a further preferred embodiment of the present invention, the rotating ring 9 is half the width of the annular steering groove 8, the rotating cross-insertion block 10 is adapted to rotate inside the annular steering groove 8, and the rotating ring 9 closes the rotating adjustment groove 6.

[0034] In a further preferred embodiment of the present invention, a plurality of rotating transverse inserting blocks 10 are provided, and the number of rotating transverse inserting blocks 10 is equal to the number of sliding inserting plates 5 . Example 2

[0035] On the basis of Example 1, a preferred embodiment of a valve packing sealing structure provided by the present invention is as follows: Figures 1 to 8 As shown: the top of the rectangular plug rod 13 is fixedly connected to the limit plate 12, and the rectangular plug rod 13 passes through the interior of the valve body 1 and the connecting flange 2 from top to bottom.

[0036] In this embodiment, the rectangular insertion rod 13 can be limited by the provided limiting plate 12 .

[0037] In a further preferred embodiment of the present invention, there are multiple threaded rods 14, and the multiple threaded rods 14 are inserted into the upper and lower sides of the rectangular plug rod 13. The number of threaded rods 14 arranged inside the valve body 1 and the connecting flange 2 is the same as the number of rectangular plug rods 13.

[0038] In a further preferred embodiment of the present invention, the fixing mechanism includes a fixing ring 15, a second screw 16 and a connecting block 17. The other end of the upper fixing ring 18 is fixedly connected to the fixing ring 15, and the other end of the fixing ring 15 is fixedly connected to the connecting block 17. The fixing ring 15 is attached to the edge of the top of the valve body 1, and a second screw 16 is provided between the upper and lower fixing rings 15 and the valve body 1 and the connecting flange 2. The upper and lower fixing rings 15 are respectively rotatably connected to the valve body 1 and the connecting flange 2 through the second screws 16, and the connecting blocks 17 on both sides are respectively attached to the edges of the valve body 1 and the connecting flange 2.

[0039] In this embodiment, the second fixing ring 18 can limit the threaded rod 14 to prevent the threaded rod 14 from being disengaged and causing leakage.

[0040] In a further preferred embodiment of the present invention, magnetic blocks 19 are fixedly connected to the interior of the second fixing rings 18 on both sides, and the magnetic blocks 19 inside the second fixing rings 18 on both sides attract each other.

[0041] In this embodiment, the magnetic block 19 is provided to fix the second fixing ring 18 , thereby achieving dual positioning of the second fixing ring 18 and protecting the threaded rod 14 .

[0042] The working principle of this utility model is as follows: after the sealing pressure cover 3 is inserted into the interior of the valve body 1, the slot 4 and the sliding insert plate 5 are aligned to limit the lateral rotation, and rotating the L-shaped steering rod 7 can rotate the rotating ring 9 and the rotating horizontal insert block 10, and the rotating horizontal insert block 10 is rotated and inserted into the interior of the limiting horizontal groove 20 for limiting, and the longitudinal position of the sliding insert plate 5 is limited. The fixed ring 2 18 can limit the threaded rod 14 to prevent the threaded rod 14 from detaching and leaking. The magnetic block 19 fixes the fixed ring 2 18 to achieve double positioning of the fixed ring 2 18 and protect the threaded rod 14.

[0043] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent replacements, improvements, etc. made within the spirit and principles of the present invention should be included in the scope of protection of the present invention.

Claims

1. A valve packing sealing structure, characterized in that: The invention comprises a valve body (1) and a connecting flange (2): the valve body (1) and the connecting flange (2) are fitted with each other, the valve body (1) is internally plugged and connected with a plugging cover (3), the inner opening of the valve body (1) is provided with a slot (4), the inner part of the slot (4) is plugged and connected with a sliding plug plate (5), the sliding plug plate (5) is fixedly connected to the outer surface of the plugging cover (3), the inner part of the sliding plug plate (5) is provided with a rotation adjustment groove (6), the inner part of the rotation adjustment groove (6) is plugged and connected with an L-shaped steering rod (7), one side of the inner opening of the valve body (1) is provided with an annular steering groove (8), the inner part of the annular steering groove (8) is fitted with a rotating ring (9), the L-shaped steering rod (7) is fixedly connected to the rotating ring (9), a first screw (11) is provided between one side of the L-shaped steering rod (7) and the outer wall of the valve body (1), the L-shaped steering rod (7) and the valve body (1) are connected by the first screw ( 11) Fixed connection, the inner opening of the rotating ring (9) is fixedly connected with a plurality of rotating horizontal plug blocks (10) at equal intervals, the outer side of the sliding plug plate (5) is provided with a limit horizontal groove (20), the rotating horizontal plug block (10) is adapted to be rotated and inserted into the interior of the limit horizontal groove (20), the interior of the valve body (1) and the connecting flange (2) are plugged and connected with a rectangular plug rod (13), the side surfaces of the valve body (1) and the connecting flange (2) are plugged and connected with a threaded rod (14), the threaded rod (14) passes through one side surface of the valve body (1) and is plugged into the interior of the rectangular plug rod (13), the side surfaces of the valve body (1) and the connecting flange (2) are both sleeved with a fixing ring 2 (18), the fixing ring 2 (18) covers the threaded rod (14), the top of the upper fixing ring 2 (18) and the bottom of the lower fixing ring 2 (18) are both provided with a fixing mechanism, and the fixing mechanisms on both sides are mirror-imaged with the contact surface of the valve body (1) and the connecting flange (2) as the axis.

2. A valve packing sealing structure according to claim 1, characterized in that: The sliding plug plate (5) is inserted into the interior of the slot (4) to slide up and down. There are multiple sliding plug plates (5), and the multiple sliding plug plates (5) are equidistantly distributed on the outer surface of the valve body (1).

3. A valve packing sealing structure according to claim 1, characterized in that: The rotating ring (9) is half the width of the annular steering groove (8), the rotating cross-insertion block (10) is adapted to rotate inside the annular steering groove (8), and the rotating ring (9) closes the rotating adjustment groove (6).

4. A valve packing sealing structure according to claim 1, characterized in that: There are multiple rotating transverse insert blocks (10), and the number of the rotating transverse insert blocks (10) is equal to the number of the sliding insert plates (5).

5. The valve packing sealing structure according to claim 1, characterized in that: The top of the rectangular plug rod (13) is fixedly connected to the limit plate (12), and the rectangular plug rod (13) penetrates the interior of the valve body (1) and the connecting flange (2) from top to bottom.

6. A valve packing sealing structure according to claim 1, characterized in that: The number of the threaded rods (14) is multiple, and the multiple threaded rods (14) are all inserted into the upper and lower sides of the rectangular plug rod (13). The number of the threaded rods (14) arranged inside the valve body (1) and the connecting flange (2) is the same as the number of the rectangular plug rods (13).

7. A valve packing sealing structure according to claim 1, characterized in that: The fixing mechanism includes a fixing ring (15), a second screw (16) and a connecting block (17). The other end of the upper fixing ring (18) is fixedly connected to the fixing ring (15). The other end of the fixing ring (15) is fixedly connected to the connecting block (17). The fixing ring (15) is fitted to the edge of the top of the valve body (1). Second screws (16) are provided between the fixing rings (15) on the upper and lower sides and the valve body (1) and the connecting flange (2). The fixing rings (15) on the upper and lower sides are rotatably connected to the valve body (1) and the connecting flange (2) respectively through the second screws (16). The connecting blocks (17) on both sides are fitted to the edges of the valve body (1) and the connecting flange (2) respectively.

8. A valve packing sealing structure according to claim 7, characterized in that: The interior of the second fixing ring (18) on both sides is fixedly connected with a magnetic block (19), and the magnetic blocks (19) inside the second fixing ring (18) on both sides are attracted to each other.

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