CN111425617B - A sealed and leak-proof ball valve - Google Patents
A sealed and leak-proof ball valve Download PDFInfo
- Publication number
- CN111425617B CN111425617B CN202010145359.3A CN202010145359A CN111425617B CN 111425617 B CN111425617 B CN 111425617B CN 202010145359 A CN202010145359 A CN 202010145359A CN 111425617 B CN111425617 B CN 111425617B
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- sealing
- valve
- valve rod
- sleeve
- mounting
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- 238000007789 sealing Methods 0.000 claims abstract description 245
- 238000009434 installation Methods 0.000 claims description 32
- 230000002035 prolonged effect Effects 0.000 abstract 1
- 230000000694 effects Effects 0.000 description 10
- 230000003247 decreasing effect Effects 0.000 description 2
- 239000012530 fluid Substances 0.000 description 2
- 238000000034 method Methods 0.000 description 2
- 238000012856 packing Methods 0.000 description 2
- XLYOFNOQVPJJNP-UHFFFAOYSA-N water Substances O XLYOFNOQVPJJNP-UHFFFAOYSA-N 0.000 description 2
- 230000009286 beneficial effect Effects 0.000 description 1
- 230000001276 controlling effect Effects 0.000 description 1
- 230000007547 defect Effects 0.000 description 1
- 238000005516 engineering process Methods 0.000 description 1
- 238000012986 modification Methods 0.000 description 1
- 230000004048 modification Effects 0.000 description 1
- 230000001105 regulatory effect Effects 0.000 description 1
Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K41/00—Spindle sealings
- F16K41/02—Spindle sealings with stuffing-box ; Sealing rings
- F16K41/023—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles
- F16K41/026—Spindle sealings with stuffing-box ; Sealing rings for spindles which only rotate, i.e. non-rising spindles for rotating valves
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0689—Packings between housing and plug
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/06—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary with plugs having spherical surfaces; Packings therefor
- F16K5/0663—Packings
- F16K5/0694—Spindle sealings
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
- F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
- F16K5/00—Plug valves; Taps or cocks comprising only cut-off apparatus having at least one of the sealing faces shaped as a more or less complete surface of a solid of revolution, the opening and closing movement being predominantly rotary
- F16K5/08—Details
- F16K5/14—Special arrangements for separating the sealing faces or for pressing them together
- F16K5/20—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces
- F16K5/201—Special arrangements for separating the sealing faces or for pressing them together for plugs with spherical surfaces with the housing or parts of the housing mechanically pressing the seal against the plug
Landscapes
- Engineering & Computer Science (AREA)
- General Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- Taps Or Cocks (AREA)
Abstract
The invention provides a sealed anti-leakage ball valve which comprises an inlet valve body, an outlet valve body, ball valves, valve seats, first sealing elements, second sealing elements, springs and a valve rod control mechanism, wherein the valve seats are arranged in the inlet valve body and the outlet valve body, the ball valves are arranged in the two valve seats, the first sealing elements which are in abutting fit with the ball valves are arranged at one ends of the valve seats, the second sealing elements are arranged at the other ends of the valve seats, the end parts of the springs are in abutting fit with one sides of the second sealing elements, the valve rod control mechanism is further arranged on the inlet valve body, a connecting seat, a valve rod shaft, a shaft sleeve and an X-shaped sealing element are arranged on the valve rod shaft in a sleeved mode, the X-shaped sealing element is arranged between the bottom of the shaft sleeve and the connecting seat, the bottom of the valve rod shaft is connected with the ball valves, and a handle is arranged at the top of the valve rod shaft, so that multiple sealing can be realized, the sealing performance of the valve can be improved, and the service life of a product can be prolonged.
Description
[ Field of technology ]
The invention relates to the technical field of ball valves, in particular to a sealing anti-leakage ball valve.
[ Background Art ]
The ball valve is an opening and closing piece used in a pipeline and used for controlling the flow and the on-off of fluid in the pipeline, and the valve core in the valve rotates through the rotating handle above the valve, so that the flow rate of the fluid passing through the valve can be regulated and adjusted. The ball valve has the advantages of strong flowing force, quick and quick opening and closing, convenient installation, more connection modes, wide application range, and no matter a single type or a combined type, the valve seat is possibly sealed loosely due to various factors, thereby causing medium leakage in a pipeline, and therefore, the medium leakage is also one of the common problems of the ball valve. At present, most valve rods and valve bodies of valves have too complex sealing structures, and especially the traditional packing sealing mode has more defects, packing pretightening force is difficult to adjust, friction force is increased too tightly, torque is increased, sealing effect is poor if the torque is too loose, sealing compensation is not carried out, and the sealing leakage-proof ball valve is generally required to be adjusted for a period of time.
[ Invention ]
The invention aims to solve the problems in the prior art, and provides a sealing anti-leakage ball valve which can realize multiple sealing, improve the sealing performance of the valve and prolong the service life of a product.
In order to achieve the above purpose, the invention provides a sealed anti-leakage ball valve, which comprises an inlet valve body, an outlet valve body, a ball valve, a valve seat, a first sealing element, a second sealing element, springs and a valve rod control mechanism, wherein a containing cavity for containing the ball valve is formed between the inlet valve body and the outlet valve body, two symmetrically arranged valve seats are arranged in the inlet valve body and the outlet valve body, the ball valve is arranged in the two valve seats, the first sealing element is arranged at one end of the valve seat close to the ball valve, the first sealing element is abutted against and matched with the ball valve, a first annular groove is formed at the other end of the valve seat, a second sealing element is arranged in the first annular groove, a plurality of springs are respectively arranged in the inlet valve body and the outlet valve body, one end of each spring is abutted against and matched with one side of the second sealing element, the valve rod control mechanism is further arranged on the inlet valve rod, a connecting seat, a valve rod shaft, a shaft sleeve and an X-shaped sealing element are arranged on the valve rod shaft in the outer part of the valve control mechanism, the shaft sleeve is arranged in the connecting seat, one end of the connecting seat is close to the X-shaped sealing element, the shaft is arranged between the bottom of the shaft sleeve and the connecting seat, the X-shaped sealing element is arranged at the bottom of the valve shaft, and the top of the valve shaft is connected with the top.
Preferably, the valve seat comprises a mounting part and a sealing part, a plurality of first annular sealing rings are mounted on the outer ring of the mounting part at intervals along the axial direction, a first annular groove is formed in one end, close to the mounting part, of the sealing part, a plurality of waterways are formed in the sealing part, one ends of the waterways are communicated with the containing cavity, and the other ends of the waterways are communicated with the first annular groove.
Preferably, the first sealing element comprises a first framework, a first sealing body, a sealing inclined surface body and a first sealing lip, a second annular groove is formed in a first conical surface of the sealing part, one end of the first framework is installed in the second annular groove, the other end of the first framework is provided with the first sealing body, the first sealing body comprises the sealing inclined surface body coated at the end part of the first framework and the first sealing lip which expands outwards along the axial direction, and the sealing inclined surface body, the first sealing lip and the ball valve are tightly matched.
Preferably, the second sealing piece comprises a second framework and a second sealing body, one side of the second framework is propped against the end part of the spring, the second sealing body is arranged on the other side of the second framework, two second sealing lips which are symmetrically arranged are arranged on the second sealing body, and the two second sealing lips are propped against and matched with the outer ring and the inner ring of the first annular groove respectively.
Preferably, the valve rod control mechanism further comprises a first sealing ring, a second sealing ring, a third sealing ring and bolts, a central shaft hole for the valve rod shaft to penetrate out is formed in the connecting seat, a first step installation cavity for installing a shaft sleeve is formed above the central shaft hole, the shaft sleeve is connected with the connecting seat through a plurality of bolts, a driving part which is propped against the X-shaped sealing piece and is matched with the X-shaped sealing piece is arranged at the bottom of the shaft sleeve, the first sealing ring is installed between the inner wall of the shaft sleeve and the outer wall of the valve rod shaft, the second sealing ring is installed between the outer wall of the shaft sleeve and the first step installation cavity, a limiting disc is arranged at the top of the shaft sleeve, and the third sealing ring is installed between the lower wall of the limiting disc and the connecting seat.
Preferably, the shaft sleeve comprises a limiting disc and a mounting sleeve which are sequentially arranged from top to bottom, the outer diameter of the limiting disc is larger than that of the mounting sleeve, a third sealing groove which is annular is formed in the joint of the lower wall of the limiting disc and the mounting sleeve, the outer ring of the third sealing groove is a second conical surface with gradually increased outer diameter from top to bottom, the third sealing groove is abutted against the third sealing ring to be matched, a first sealing groove for mounting the first sealing ring is formed in the inner wall of the mounting sleeve, a second sealing groove for mounting the second sealing ring is formed in the outer wall of the mounting sleeve, and a plurality of mounting holes are uniformly distributed in the limiting disc.
Preferably, the bottom of the installation sleeve is provided with a driving part, the cross section of the driving part is trapezoid, the outer wall of the driving part is an outer conical surface with the outer diameter gradually decreasing from top to bottom, the inner wall of the driving part is an inner conical surface with the outer diameter gradually increasing from top to bottom, the cross section of the X-shaped sealing element is X-shaped, four sealing skirts are arranged on the X-shaped sealing element, two sealing skirts of the outer ring of the X-shaped sealing element are propped against the first step installation cavity, and two sealing skirts of the inner ring of the X-shaped sealing element are propped against the valve rod shaft.
The invention has the beneficial effects that through the cooperation of the inlet valve body, the outlet valve body, the ball valve, the valve seat, the first sealing element, the second sealing element, the spring, the valve rod control mechanism and the like, the first sealing element and the second annular sealing ring can be abutted against the ball valve to achieve the double sealing effect, the sealing inclined surface body and the first sealing lip are arranged on the first sealing element, the sealing performance can be further improved, the medium pressure in the valve body can be applied to the second sealing element through the waterway branch, the valve seat is abutted against one side of the ball valve by utilizing the reaction force, and the sealing compensation is carried out on the first sealing element, so that the sealing effect is further improved. In addition, when the medium in the valve body flows out from the clearance between the valve rod shaft and the shaft sleeve, the double sealing is carried out by the four sealing skirts of the X-shaped sealing piece, and then the multiple sealing is realized through the first sealing ring, the second sealing ring and the third sealing ring, so that the sealing performance is reliable and durable. In addition, can control the axle sleeve inwards compress tightly through tightening the bolt, on the one hand, the drive division of axle sleeve bottom can extrude sealed shirt rim, makes sealed shirt rim hug closely valve body and valve shaft, on the other hand, can extrude the third sealing washer, further improves the effect of leakproofness.
The features and advantages of the present invention will be described in detail by way of example with reference to the accompanying drawings.
[ Description of the drawings ]
FIG. 1 is a schematic cross-sectional view of a sealed, leak-proof ball valve of the present invention;
FIG. 2 is an enlarged schematic view at A of FIG. 1;
FIG. 3 is a schematic cross-sectional view of a first seal of the present invention sealing a leak-proof ball valve;
FIG. 4 is a schematic cross-sectional view of a second seal of the present invention sealing a leak-proof ball valve.
FIG. 5 is a schematic cross-sectional view of a sealed leak-proof ball valve of the present invention;
FIG. 6 is a schematic cross-sectional view of a connection seat of a sealed leak-proof ball valve of the present invention;
FIG. 7 is a schematic cross-sectional view of a sleeve of a sealed leak-proof ball valve of the present invention;
FIG. 8 is a schematic cross-sectional view of an X-shaped seal of a sealed leak-proof ball valve of the invention.
[ Detailed description ] of the invention
Referring to fig. 1 to 8, the sealed anti-leakage ball valve comprises an inlet valve body 1, an outlet valve body 2, a ball valve 3, a valve seat 4, a first sealing piece 5, a second sealing piece 6, springs 7 and a valve rod control mechanism 8, wherein a cavity for accommodating the ball valve 3 is formed between the inlet valve body 1 and the outlet valve body 2, two symmetrically arranged valve seats 4 are arranged in the inlet valve body 1 and the outlet valve body 2, the ball valve 3 is arranged in the two valve seats 4, one end, close to the ball valve 3, of the valve seat 4 is provided with the first sealing piece 5, the first sealing piece 5 is in abutting fit with the ball valve 3, the other end of the valve seat 4 is provided with a first annular groove 423, the first annular groove 423 is internally provided with the second sealing piece 6, one sides of the inlet valve body 1 and the outlet valve body 2 are respectively provided with the springs 7, one sides of the springs 7 are in abutting fit with one sides of the second sealing piece 6, the valve rod control mechanism 8 is further arranged on the inlet valve body 1, the valve rod control mechanism 8 is provided with a connecting seat 81, a shaft sleeve 83 and a shaft sleeve 83, the shaft sleeve 83 is arranged at one end of the valve rod control mechanism 8, the shaft sleeve 83 is arranged at the bottom of the shaft sleeve 82 and the shaft sleeve 83 is connected with the shaft sleeve 82, the shaft sleeve 83 is arranged at the bottom of the shaft sleeve 82, and the shaft sleeve 82 is connected with the shaft sleeve 82, and the shaft sleeve 83 is arranged at the bottom portion 82 is connected with the shaft sleeve 82, and the bottom portion 82 is connected with the shaft sleeve 82.
Further, a first installation cavity 11 is respectively arranged in the inlet valve body 1 and the outlet valve body 2, the valve seat 4 is installed in the first installation cavity 11, a first stepped groove 12 is arranged on one side, close to the ball valve 3, of the first installation cavity 11, a plurality of spring installation holes 13 for installing springs 7 are circumferentially distributed on the first stepped groove 12, the valve seat 4 comprises an installation part 41 and a sealing part 42, the installation part 41 is arranged in the first installation cavity 11, the sealing part 42 is arranged in the first stepped groove 12, a plurality of first annular sealing rings 411 are installed on the outer ring of the installation part 41 at intervals along the axis direction, the first annular sealing rings 411 are tightly matched with the first installation cavity 11, a first annular groove 423 is formed in one end, close to the installation part 41, of the sealing part 42, a first conical surface is arranged on the other end of the sealing part 42, a second annular sealing ring 422 is installed in the first conical surface, the second annular sealing ring 422 is tightly matched with the ball valve 3, a plurality of branches 421 are formed in the sealing part 42, and the other end of the second annular sealing ring 422 is communicated with a water path through a plurality of branches 421, and the other end of branches 421 are communicated with a water path.
Further, the first sealing member 5 includes a first skeleton 51, a first sealing body 52, a sealing bevel body 53 and a first sealing lip 54, a second annular groove is formed in a first conical surface of the sealing portion 42, one end of the first skeleton 51 is installed in the second annular groove, the other end of the first skeleton 51 is provided with the first sealing body 52, the first sealing body 52 includes a sealing bevel body 53 coated at an end of the first skeleton 51 and a first sealing lip 54 radially expanding outwards along an axial direction, and the sealing bevel body 53, the first sealing lip 54 and the ball valve 3 are tightly matched to achieve a double sealing effect.
Further, the second sealing member 6 includes a second frame 61 and a second sealing body 62, one side of the second frame 61 abuts against an end portion of the spring 7, the second sealing body 62 is disposed on the other side of the second frame 61, two second sealing lips 621 disposed symmetrically are disposed on the second sealing body 62, and the two second sealing lips 621 abut against and cooperate with an outer ring and an inner ring of the first annular groove 423 respectively.
Further, the valve rod control mechanism 8 further includes a first sealing ring 85, a second sealing ring 86, a third sealing ring 87 and a bolt 88, a central shaft hole 811 for the valve rod shaft 82 to penetrate is formed in the connecting seat 81, a first step installation cavity 812 for installing the shaft sleeve 83 is formed above the central shaft hole 811, the shaft sleeve 83 is connected with the connecting seat 81 through a plurality of bolts 88, a driving portion 834 which is in abutting fit with the X-shaped sealing member 84 is formed at the bottom of the shaft sleeve 83, the first sealing ring 85 is installed between the inner wall of the shaft sleeve 83 and the outer wall of the valve rod shaft 82, the second sealing ring 86 is installed between the outer wall of the shaft sleeve 83 and the first step installation cavity 812, a limiting disc 831 is arranged at the top of the shaft sleeve 83, and the third sealing ring 87 is installed between the lower wall of the limiting disc 831 and the connecting seat 81.
Further, the shaft sleeve 83 includes from last limit disc 831 and the installation cover 832 that sets gradually down, the external diameter of limit disc 831 is greater than the external diameter of installation cover 832, the lower wall of limit disc 831 is equipped with and is annular third seal groove 833 with the junction of installation cover 832, the outer lane of third seal groove 833 is from last second conical surface to the external diameter increase gradually down, third seal groove 833 offsets to lean on the cooperation with third sealing washer 87, the first seal groove that is used for installing first sealing washer 85 has been seted up to the inner wall of installation cover 832, the second seal groove that is used for installing second sealing washer 86 has been seted up to the outer wall of installation cover 832, the equipartition has a plurality of mounting hole 8311 on the limit disc 831.
Further, a driving portion 834 is disposed at the bottom of the mounting sleeve 832, the cross-sectional shape of the driving portion 834 is trapezoid, the outer wall of the driving portion 834 is an outer conical surface 8341 with the outer diameter gradually decreasing from top to bottom, the inner wall of the driving portion 834 is an inner conical surface 8342 with the outer diameter gradually increasing from top to bottom, the cross-sectional shape of the X-shaped sealing member 84 is an X-shape, four sealing skirts 840 are disposed on the X-shaped sealing member 84, two sealing skirts 840 of the outer ring of the X-shaped sealing member 84 are abutted against the first step mounting cavity 812, and two sealing skirts 840 of the inner ring of the X-shaped sealing member 84 are abutted against the valve rod shaft 82. In the process of downward movement of the shaft sleeve, the driving part can be ensured to be propped against the upper part of the X-shaped sealing element, so that the X-shaped sealing element is propped against the valve body and the valve rod shaft, and the effect of compensating sealing is achieved.
Further, the X-shaped sealing member 84 includes an upper sealing portion 841 and a lower sealing portion 842 symmetrically disposed from top to bottom, the upper sealing portion 841 and the lower sealing portion 842 have two V-shaped sealing skirts 840 respectively, and the driving portion 834 abuts against the upper sealing portion 841. The arrangement of four sealing skirt edges can achieve the effect of double sealing, and the sealing performance of connection is effectively improved.
Further, a second step installation cavity 813 matched with the limiting disc 831 is arranged above the first step installation cavity 812, a plurality of threaded holes 814 matched with the bolts 88 are circumferentially formed in the lower wall of the second step installation cavity 813, the cross-sectional shapes of the second step installation cavity 813, the first step installation cavity 812 and the central shaft hole 811 are all circular, the outer diameter of the second step installation cavity 813 is larger than that of the first step installation cavity 812, and the outer diameter of the first step installation cavity 812 is larger than that of the central shaft hole 811.
The working process of the invention comprises the following steps:
the invention relates to a sealing leakage-proof ball valve, wherein a first sealing element 5 and a second annular sealing ring 422 can be abutted against a ball valve 3 to achieve the effect of double sealing, a sealing inclined surface body 53 and a first sealing lip 54 are arranged on the first sealing element 5, the first annular sealing ring 411 can be abutted against a first mounting cavity 11 to seal, the sealing performance can be further improved, in addition, the pressure of medium in a valve body can be applied to a second sealing element 6 through a waterway branch, a valve seat 4 is abutted against one side of the ball valve 3 by utilizing reaction force, and the sealing compensation is carried out on the first sealing element 5, so that the sealing effect is further improved. When the valve rod shaft is assembled, the valve rod shaft 82 is inserted into the connecting seat 81, the X-shaped sealing element 84 is placed at the bottom of the first step mounting cavity 812, the third sealing ring 87 is placed below the third sealing groove 833, the first sealing ring 85 and the second sealing ring 86 are respectively mounted on the first sealing groove, the shaft sleeve 83 is mounted in the valve rod shaft 82 and the connecting seat 81, and the shaft sleeve is pre-tensioned by the bolts 88. When the medium in the valve body flows out from the gap between the valve rod shaft and the shaft sleeve, the double sealing is performed by the four sealing skirt edges 840 of the X-shaped sealing element 84, and then the multiple sealing is realized by the first sealing ring 85, the second sealing ring 86 and the third sealing ring 87, so that the sealing performance is reliable and durable. In addition, the shaft sleeve 83 can be controlled to be pressed inwards by tightening the bolt 8, on one hand, the driving part at the bottom of the shaft sleeve 83 can squeeze the sealing skirt 840, so that the sealing skirt 840 is tightly attached to the connecting seat 81 and the valve rod shaft 82, and on the other hand, the third sealing ring 87 can be squeezed, and the sealing effect is further improved.
The above embodiments are illustrative of the present invention, and not limiting, and any simple modifications of the present invention fall within the scope of the present invention.
Claims (3)
1. A sealing anti-leakage ball valve is characterized by comprising an inlet valve body (1), an outlet valve body (2), a ball valve (3), a valve seat (4), a first sealing element (5), a second sealing element (6), a spring (7) and a valve rod control mechanism (8), wherein a cavity for accommodating the ball valve (3) is formed between the inlet valve body (1) and the outlet valve body (2), two symmetrically arranged valve seats (4) are arranged in the inlet valve body (1) and the outlet valve body (2), the ball valve (3) is arranged in the two valve seats (4), one end, close to the ball valve (3), of the valve seat (4) is provided with a first sealing element (5), the first sealing element (5) is in abutting fit with the ball valve (3), the other end of the valve seat (4) is provided with a first annular groove (423), the second sealing element (6) is arranged in the first annular groove (423), and the inlet valve body (1) is provided with a second annular groove (423) A plurality of springs (7) are respectively arranged in the outlet valve body (2), the end parts of the springs (7) are propped against one side of the second sealing element (6) to be matched, a valve rod control mechanism (8) is also arranged on the inlet valve body (1), a connecting seat (81), a valve rod shaft (82), a shaft sleeve (83) and an X-shaped sealing element (84) are arranged on the valve rod control mechanism (8), the shaft sleeve (83) is sleeved outside the valve rod shaft (82), and the valve rod shaft (82), The shaft sleeve (83) is arranged in the connecting seat (81), an X-shaped sealing element (84) is arranged between the bottom of the shaft sleeve (83) and the connecting seat (81), the bottom of the valve rod shaft (82) is connected with the ball valve (3), the handle (80) is arranged at the top of the valve rod shaft (82), the valve seat (4) comprises a mounting part (41) and a sealing part (42), a plurality of first annular sealing rings (411) are arranged on the outer ring of the mounting part (41) at intervals along the axial direction, a first annular groove (423) is formed in one end, close to the mounting part (41), of the sealing part (42), a plurality of waterway branches (421) are formed in the sealing part (42), one end of each waterway branch (421) is communicated with the containing cavity, the other end of each waterway branch (421) is communicated with the first annular groove (423), and the first sealing element (5) comprises a first framework (51), The sealing device comprises a first sealing body (52), a sealing inclined surface body (53) and a first sealing lip (54), wherein a second annular groove is formed in a first conical surface of the sealing part (42), one end of a first framework (51) is installed in the second annular groove, the other end of the first framework (51) is provided with the first sealing body (52), the first sealing body (52) comprises the sealing inclined surface body (53) coated at the end part of the first framework (51) and the first sealing lip (54) radially expanding outwards along the axial direction, the sealing inclined surface body (53), the first sealing lip (54) are tightly matched with the ball valve (3), and the second sealing piece (6) comprises a second framework (61), The second sealing body (62), one side of the second framework (61) is abutted against the end part of the spring (7), the second sealing body (62) is arranged on the other side of the second framework (61), two second sealing lips (621) which are symmetrically arranged are arranged on the second sealing body (62), and the two second sealing lips (621) are abutted against and matched with the outer ring and the inner ring of the first annular groove (423) respectively; the valve rod control mechanism (8) also comprises a first sealing ring (85), a second sealing ring (86), third sealing washer (87) and bolt (88), have central shaft hole (811) that supplies valve rod axle (82) to wear out in connecting seat (81), the top in central shaft hole (811) is equipped with first ladder installation cavity (812) that are used for installing axle sleeve (83), axle sleeve (83) are connected with connecting seat (81) through a plurality of bolt (88), the bottom of axle sleeve (83) has and offsets and lean on complex drive portion (834) with X-shaped sealing member (84), install first sealing washer (85) between the inner wall of axle sleeve (83) and the outer wall of valve rod axle (82), install second sealing washer (86) between the outer wall of axle sleeve (83) and first ladder installation cavity (812), the top of axle sleeve (83) has spacing dish (831), install third sealing washer (87) between the lower wall of spacing dish (831) and connecting seat (81).
2. The sealed anti-leakage ball valve of claim 1, wherein the shaft sleeve (83) comprises a limiting disc (831) and a mounting sleeve (832) which are sequentially arranged from top to bottom, the outer diameter of the limiting disc (831) is larger than that of the mounting sleeve (832), a third annular sealing groove (833) is formed at the joint of the lower wall of the limiting disc (831) and the mounting sleeve (832), the outer ring of the third sealing groove (833) is a second conical surface with the gradually increased outer diameter from top to bottom, the third sealing groove (833) is abutted against and matched with the third sealing ring (87), a first sealing groove for mounting a first sealing ring (85) is formed in the inner wall of the mounting sleeve (832), a second sealing groove for mounting a second sealing ring (86) is formed in the outer wall of the mounting sleeve (832), and a plurality of mounting holes (8311) are uniformly distributed on the limiting disc (831).
3. A sealing and leakage-preventing ball valve according to claim 2, wherein a driving part (834) is arranged at the bottom of the mounting sleeve (832), the cross section of the driving part (834) is trapezoid, the outer wall of the driving part (834) is an outer conical surface (8341) with gradually reduced outer diameter from top to bottom, the inner wall of the driving part (834) is an inner conical surface (8342) with gradually increased outer diameter from top to bottom, the cross section of the X-shaped sealing element (84) is X-shaped, four sealing skirts (840) are arranged on the X-shaped sealing element (84), two sealing skirts (840) on the outer ring of the X-shaped sealing element (84) are abutted against the first step mounting cavity (812), and two sealing skirts (840) on the inner ring of the X-shaped sealing element (84) are abutted against the valve rod shaft (82).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010145359.3A CN111425617B (en) | 2020-03-05 | 2020-03-05 | A sealed and leak-proof ball valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
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| DE19842922A1 (en) * | 1998-09-18 | 2000-03-23 | Rieger Gmbh & Co Kg Geb | Valve, especially double seat valve |
| CN107084258B (en) * | 2017-06-07 | 2023-04-28 | 浙江东信阀门有限公司 | Butt-clamping fluorine ball valve |
| CN207005335U (en) * | 2017-07-01 | 2018-02-13 | 浙江他山流体控制科技有限公司 | A kind of new seal ball-valve |
| CN207080636U (en) * | 2017-08-18 | 2018-03-09 | 浙江天信仪表科技有限公司 | Low Torque Resilient Floating Ball Valve |
| CN207421386U (en) * | 2017-09-30 | 2018-05-29 | 雷蒙德(北京)科技股份有限公司 | Floating ball valve |
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