Eccentric semi-ball valve with soft and hard dual sealing

Abstract

The utility model discloses an eccentric semi-ball valve with soft and hard dual sealing, which comprises a ball valve shell and a sealing cover bolted and fixed at the top of the ball valve shell, the left side and the right side of the ball valve shell are respectively provided with an air outlet and an air inlet, and an inner cavity of the ball valve shell is provided with a semi-ball body. A connecting shell, a hollow pipe, a hollow cylinder, a connecting block and a hemisphere can be driven to rotate by rotating a valve rod, so that opening and closing of an air inlet are achieved, a threaded rod can be driven to rotate by rotating a rotary knob, a threaded sleeve is driven to horizontally move rightwards, and the threaded sleeve moves rightwards to drive a vertical rod to move rightwards through a baffle and drive a movable block to move rightwards. The movable block moves rightwards to drive the hemisphere to horizontally move rightwards through the traction rod and the connecting block, so that the rubber sealing ring slides into the stainless steel sealing ring, soft and hard dual sealing of the hemisphere is achieved, the sealing performance is met, and meanwhile the service life of the eccentric hemisphere valve is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model relates to eccentric half ball valve technical field especially relates to a kind of eccentric half ball valve with soft and hard double seal. BACKGROUND

[0002] Eccentric half ball valve is also called C type ball valve, it is by rotating half ball to make valve open or close, its switch is light, and small in size, can be made into very large caliber, simple structure, easy to maintain, sealing surface and ball surface are often in closed state, not easy to be eroded by medium, widely used in petroleum, chemical industry, city water supply and drainage and other strict sealing conditions.Eccentric half ball valve currently used, according to the different sealing surface, can be divided into soft sealing eccentric half ball valve and hard sealing eccentric half ball valve, soft seal generally uses rubber seal ring, easy to age, fall off, lose sealing ability, hard seal generally uses stainless steel seal ring, easy to leak, sealing effect is not easy to guarantee;In practical application, the sealing of sealing surface often only uses one seal, once sealing fails, then it will cause valve leakage, cause serious consequences, for this purpose, we propose a kind of eccentric half ball valve with soft and hard double seal to solve the above technical problems. SUMMARY

[0003] One of the purposes of the utility model is realized by the following technical scheme:

[0004] An eccentric half ball valve with soft and hard double seal, including ball valve shell and sealing cover fixedly connected on the top of ball valve shell, the left and right sides of the ball valve shell are respectively provided with gas outlet and gas inlet, the inner chamber of the ball valve shell is provided with a hemispherical body, and the right side of the hemispherical body is provided with a double sealing mechanism, the bottom of the hemispherical body is fixedly connected with a limiting shaft, the inner chamber of the bottom of the ball valve shell is provided with a sliding groove matched with the limiting shaft, and the bottom end of the limiting shaft is inserted into the inner chamber of the sliding groove, the top of the hemispherical body is fixedly connected with a connecting block, the top of the connecting block is slidably connected with a hollow cylinder, and the right side of the connecting block is provided with a traction mechanism, the top of the hollow cylinder is fixedly connected with a hollow pipe, the sealing cover is provided with a through hole matched with the hollow pipe, the top end of the hollow pipe penetrates the inner chamber of the through hole, and a connecting shell is fixedly connected, the top of the connecting shell is fixedly connected with a valve stem, the outer wall of the hollow pipe is fixedly connected with an annular plate, and the outer side of the annular plate is rotatably sleeved with a sleeve, and the bottom of the sleeve is fixedly connected with the top of the sealing cover.

[0005] Further, the double sealing mechanism includes a stainless steel seal ring, and the stainless steel seal ring is arranged in the inner chamber of the gas inlet, a rubber seal ring matched with the stainless steel seal ring is slidably inserted into the inner chamber of the stainless steel seal ring, and the rubber seal ring is fixedly connected with the right side wall of the hemispherical body.

[0006] Further, the traction mechanism comprises a traction rod, one end of the traction rod is fixedly connected to the right side of the connecting block, the right side of the hollow cylinder is provided with a through hole matched with the traction rod, the other end of the traction rod penetrates through the through hole, extends to the inner cavity of the hollow cylinder, and is fixedly connected with a movable block, the top of the hollow cylinder is provided with a first through groove in communication with the inner cavity of the hollow tube, the inner cavity of the first through groove is slidably connected with a vertical rod, the bottom end of the vertical rod is fixedly connected with the movable block, the bottom of the connecting shell is provided with a second through groove in communication with the inner cavity of the hollow tube, the top end of the vertical rod penetrates through the inner cavity of the second through groove, and is fixedly connected with a baffle, the top of the baffle is fixedly connected with a threaded sleeve, the inner cavity of the threaded sleeve is threadedly connected with a threaded rod, the left side of the connecting shell is provided with a through hole, one end of the threaded rod is rotatably connected with the right side wall of the inner cavity of the connecting shell, and the other end of the threaded rod penetrates through the inner cavity of the through hole and is fixedly connected with a knob.

[0007] Further, the bottom of the baffle is arranged in abutment with the inner cavity bottom of the connecting shell, and the top view cross-sectional area of the baffle is greater than the opening area of the second through groove.

[0008] Further, the top of the connecting shell is slidably penetrated by a first T-shaped rod near the right side, and the outer wall of the first T-shaped rod is sleeved with a first spring, both ends of the first spring are fixedly connected with the first T-shaped rod and the connecting shell respectively, and a lock hole is formed in the baffle near the right side, and the longest end of the first T-shaped rod is inserted into the inner cavity of the lock hole.

[0009] Further, the right side of the sleeve is slidably penetrated by a second T-shaped rod, and the outer wall of the second T-shaped rod is sleeved with a second spring, both ends of the second spring are fixedly connected with the sleeve and the second T-shaped rod respectively, the outer wall of the annular plate is uniformly provided with a plurality of insertion holes, and the longest end of the second T-shaped rod is inserted into the inner cavity of one of the insertion holes.

[0010] Further, the inner cavity of the ball valve shell is provided with an annular clamping groove at the top, and the inner cavity of the annular clamping groove is provided with a lower sealing ring matched therewith, the top of the lower sealing ring is in abutment with an upper sealing ring, and the upper sealing ring is fixedly connected with the sealing cover.

[0011] Compared with the prior art, the beneficial effects of the utility model lie in:

[0012] 1、 by rotating the valve stem can drive the connection shell, hollow tube, hollow cylinder, connecting block and hemispherical body rotation, thereby realizing the opening and closing of the air inlet, and by rotating the knob can drive the threaded rod rotation and threaded sleeve horizontal right movement, threaded sleeve to the right by the baffle driven vertical rod to the right and drive the movable block to the right, the movable block to the right through the traction rod and connecting block driven hemispherical body horizontal right movement, so as to slide into the rubber sealing ring into the stainless steel sealing ring, realize the soft and hard double sealing of the hemispherical body, not only meet the sealing performance, at the same time, improve the service life of the eccentric hemispherical valve.

[0013] 2、 by the setting of the second T-shaped rod, the second spring, the annular plate, the sleeve and the jack, after the valve stem is rotated, the second T-shaped rod is inserted into the adjacent jack lumen, thereby locking the valve stem, improving the sealing stability, in addition, by the setting of the first T-shaped rod, the first spring, the baffle and the lock hole, after the hemispherical body seals the air inlet, the longest end of the first T-shaped rod is inserted into the lock hole lumen, thereby locking the baffle, avoiding the stability of the double sealing mechanism. BRIEF DESCRIPTION OF DRAWINGS

[0014] Figure 1 It is the front view structure schematic diagram of the embodiment;

[0015] Figure 2 It is Figure 1 the structure enlarged view of A in the middle;

[0016] Figure 3 It is Figure 1 the structure enlarged view of B in the middle;

[0017] Figure 4 It is Figure 1 the structure enlarged view of C in the middle.

[0018] In the figure: 1, ball valve shell; 2, air inlet; 3, air outlet; 4, hemispherical body; 5, rubber sealing ring; 6, stainless steel sealing ring; 7, limit shaft; 8, sliding groove; 9, sealing cover; 10, annular clamping groove; 11, lower sealing ring; 12, upper sealing ring; 13, sleeve; 14, connecting block; 15, hollow cylinder; 16, hollow tube; 17, connecting shell; 18, valve stem; 19, traction rod; 20, movable block; 21, vertical rod; 22, annular plate; 23, second T-shaped rod; 24, jack; 25, second spring; 26, baffle; 27, threaded sleeve; 28, threaded rod; 29, knob; 30, first T-shaped rod; 31, lock hole; 32, first spring. DETAILED DESCRIPTION

[0019] Please refer to Figures 1 to 4 , the utility model provides the following technical scheme:

[0020] The utility model provides an eccentric half -ball valve with soft and hard double seal, including ball valve shell 1 and the sealing cover 9 of bolted fixed in the top of ball valve shell 1, and the left and right sides of ball valve shell 1 are equipped with gas outlet 3 and gas inlet 2 respectively, the inner chamber of ball valve shell 1 is equipped with half -spheres 4, and the right side of half -spheres 4 is equipped with double -seal mechanism, the bottom of half -spheres 4 is fixedly connected with limit shaft 7, and the inner chamber bottom of ball valve shell 1 is equipped with sliding slot 8 matched with limit shaft 7, and the bottom of limit shaft 7 is inserted in the inner chamber of sliding slot 8, the top of half -spheres 4 is fixedly connected with connecting block 14, connecting block 14 is slidably connected with hollow cylinder 15, and the right side of connecting block 14 is equipped with traction mechanism, the top of hollow cylinder 15 is fixedly connected with hollow pipe 16, the sealing cover 9 is equipped with the through -hole matched with hollow pipe 16, and the top of hollow pipe 16 is inserted into the through -hole inner chamber, and is fixedly connected with connecting shell 17, the top of connecting shell 17 is fixedly connected with valve stem 18, the outer wall of hollow pipe 16 is sleeved with annular plate 22, and the outside of annular plate 22 is rotatably sleeved with sleeve 13, the bottom of sleeve 13 is fixedly connected with the top of sealing cover 9, the inner chamber top of ball valve shell 1 is equipped with annular clamping groove 10, and the inner chamber bottom of annular clamping groove 10 is provided with lower sealing ring 11 matched with it, and upper sealing ring 12 is arranged on the top of lower sealing ring 11, and upper sealing ring 12 is fixedly connected with sealing cover 9, improve the sealing effect of sealing cover 9 and ball valve shell 1 connection.

[0021] Double -seal mechanism includes stainless steel sealing ring 6, and stainless steel sealing ring 6 is arranged in the inner chamber of gas inlet 2, the inner chamber of stainless steel sealing ring 6 is slidably inserted with rubber sealing ring 5 matched with it, and rubber sealing ring 5 is fixedly connected with the right side wall of half -spheres 4, and double -seal is carried out by rubber sealing ring 5 and stainless steel sealing ring 6.

[0022] The traction mechanism comprises a traction rod 19, one end of which is fixedly connected to the right side of the connecting block 14, the right side of the hollow cylinder 15 is provided with a through hole matched with the traction rod 19, the other end of the traction rod 19 penetrates through the through hole, extends into the inner cavity of the hollow cylinder 15, and is fixedly connected with a movable block 20, the top of the hollow cylinder 15 is provided with a first through slot in communication with the inner cavity of the hollow tube 16, the inner cavity of the first through slot is slidably connected with a vertical rod 21, the bottom end of the vertical rod 21 is fixedly connected with the movable block 20, the bottom of the connecting shell 17 is provided with a second through slot in communication with the inner cavity of the hollow tube 16, the top end of the vertical rod 21 penetrates through the inner cavity of the second through slot, and is fixedly connected with a baffle 26, the bottom of the baffle 26 is arranged in abutment with the inner cavity of the connecting shell 17, the top view cross-sectional area of the baffle 26 is larger than the opening area of the second through slot, the top of the baffle 26 is fixedly connected with a threaded sleeve 27, the inner cavity of the threaded sleeve 27 is threadedly connected with a threaded rod 28, the left side of the connecting shell 17 is provided with a through hole, one end of the threaded rod 28 is rotatably connected with the right side wall of the inner cavity of the connecting shell 17, the other end of the threaded rod 28 penetrates through the inner cavity of the through hole, and is fixedly connected with a knob 29, the knob 29 is twisted to drive the threaded rod 28 to rotate, the threaded rod 28 rotates to drive the threaded sleeve 27 to slide horizontally to the right, and drives the baffle 26 to move to the right, the baffle 26 moves to the right to drive the movable block 20 to move to the right through the vertical rod 21, the movable block 20 moves to the right to drive the connecting block 14 to slide horizontally to the right through the traction rod 19, and drives the hemispherical body 4 to move to the right, so that the rubber sealing ring 5 can be slid into the inner cavity of the stainless steel sealing ring 6, and double sealing of the eccentric hemispherical valve is realized.

[0023] The top of the connecting shell 17 near the right side is slidably penetrated by a first T-shaped rod 30, and the outer wall of the first T-shaped rod 30 is sleeved with a first spring 32, the two ends of the first spring 32 are fixedly connected with the first T-shaped rod 30 and the connecting shell 17 respectively, the baffle 26 is provided with a lock hole 31 near the right side, and the longest end of the first T-shaped rod 30 is inserted into the inner cavity of the lock hole 31, so that the baffle 26 can be locked by inserting the longest end of the first T-shaped rod 30 into the inner cavity of the lock hole 31, to avoid automatic resetting of the hemispherical body 4.

[0024] The right side of the sleeve 13 is slidably penetrated by a second T-shaped rod 23, and the outer wall of the second T-shaped rod 23 is sleeved with a second spring 25, the two ends of the second spring 25 are fixedly connected with the sleeve 13 and the second T-shaped rod 23 respectively, the outer wall of the annular plate 22 is uniformly provided with a plurality of insertion holes 24, and the longest end of the second T-shaped rod 23 is inserted into the inner cavity of one of the insertion holes 24, so that the annular plate 22 can be locked by inserting the longest end of the second T-shaped rod 23 into the inner cavity of the insertion hole 24, to avoid self-rotation of the hollow tube 16, thereby improving the sealing stability.

[0025] Working principle: the utility model discloses in use, through the rotation valve stem 18 drive connecting shell 17 rotation, connecting shell 17 rotation drive hollow tube 16 rotation, hollow tube 16 rotation drive hollow cylinder 15 rotation, and drive hemisphere 4 rotation and close to air intake 2 through connecting block 14, subsequently, through the screw knob 29 drive screw rod 28 rotation, screw rod 28 rotation drive threaded sleeve 27 horizontal right -hand side removes, threaded sleeve 27 right -hand side removes drive baffle 26 right -hand side removes, and drive movable block 20 right -hand side removes through vertical rod 21, movable block 20 right -hand side removes drive connecting block 14 right -hand side slide through the drag link 19, and drive hemisphere 4 horizontal right -hand side removes, thereby can with rubber sealing ring 5 slide into the inner chamber of stainless steel sealing ring 6, and further realize soft and hard double seal, and after loosening second T-shaped rod 23, can under the action of second spring 25 resilience inserts the inner chamber of the current adjacent jack 24, thereby avoid the autorotation of valve stem 18, in addition, through loosening first T-shaped rod 30 and under the action of first spring 32 resilience inserts the inner chamber of lock hole 31, thereby can lock baffle 26, and further improve the stability of double seal structure.

Claims

1. An eccentric hemispherical valve with both soft and hard seals, comprising a ball valve housing (1) and a sealing cap (9) bolted to the top of the ball valve housing (1), characterized in that: The ball valve housing (1) has an air outlet (3) and an air inlet (2) on its left and right sides, respectively. The inner cavity of the ball valve housing (1) has a hemisphere (4), and the right side of the hemisphere (4) has a double sealing mechanism. The bottom of the hemisphere (4) is fixedly connected to a limiting shaft (7). The bottom of the inner cavity of the ball valve housing (1) has a sliding groove (8) that matches the limiting shaft (7), and the bottom end of the limiting shaft (7) is inserted into the inner cavity of the sliding groove (8). The top of the hemisphere (4) is fixedly connected to a connecting block (14), and the top of the connecting block (14) is slidably connected to a hollow cylinder (15). Furthermore, a traction mechanism is provided on the right side of the connecting block (14), a hollow tube (16) is fixedly connected to the top of the hollow cylinder (15), a through hole adapted to the hollow tube (16) is opened on the sealing cover (9), and the top end of the hollow tube (16) penetrates the inner cavity of the through hole and is fixedly connected to a connecting shell (17), a valve stem (18) is fixedly connected to the top of the connecting shell (17), an annular plate (22) is fixedly fitted on the outer wall of the hollow tube (16), and a sleeve (13) is rotatably fitted on the outer side of the annular plate (22), and the bottom of the sleeve (13) is fixedly connected to the top of the sealing cover (9).

2. The eccentric hemispherical valve with both soft and hard seals as described in claim 1, characterized in that: The double sealing mechanism includes a stainless steel sealing ring (6), and the stainless steel sealing ring (6) is disposed in the inner cavity of the air inlet (2). A rubber sealing ring (5) adapted to it is slidably inserted into the inner cavity of the stainless steel sealing ring (6), and the rubber sealing ring (5) is fixedly connected to the right side wall of the hemisphere (4).

3. An eccentric hemispherical valve with both soft and hard seals as described in claim 1, characterized in that: The traction mechanism includes a traction rod (19), one end of which is fixedly connected to the right side of the connecting block (14). A through hole adapted to the traction rod (19) is provided on the right side of the hollow cylinder (15), and the other end of the traction rod (19) passes through the through hole, extends into the inner cavity of the hollow cylinder (15), and is fixedly connected to a movable block (20). A first through groove communicating with the inner cavity of the hollow tube (16) is provided at the top of the hollow cylinder (15), and a vertical rod (21) is slidably connected to the inner cavity of the first through groove. The bottom end of the vertical rod (21) is fixedly connected to the movable block (20). The bottom of the connecting shell (17) is provided with a second through groove that communicates with the inner cavity of the hollow tube (16), and the top of the vertical rod (21) passes through the inner cavity of the second through groove and is fixedly connected to a baffle (26). The top of the baffle (26) is fixedly connected to a threaded sleeve (27), and the inner cavity of the threaded sleeve (27) is threadedly connected to a threaded rod (28). The left side of the connecting shell (17) is provided with a through hole, one end of the threaded rod (28) is rotatably connected to the right side wall of the inner cavity of the connecting shell (17), and the other end of the threaded rod (28) passes through the inner cavity of the through hole and is fixedly connected to a knob (29).

4. An eccentric hemispherical valve with both soft and hard seals as described in claim 3, characterized in that: The bottom of the baffle (26) is fitted to the bottom of the inner cavity of the connecting shell (17), and the top view cross-sectional area of ​​the baffle (26) is larger than the opening area of ​​the second through groove.

5. An eccentric hemispherical valve with both soft and hard seals as described in claim 3, characterized in that: The top of the connecting shell (17) is slidably penetrated by a first T-shaped rod (30) near the right side, and a first spring (32) is sleeved on the outer wall of the first T-shaped rod (30). The two ends of the first spring (32) are fixedly connected to the first T-shaped rod (30) and the connecting shell (17) respectively. A lock hole (31) is opened on the baffle (26) near the right side, and the longest end of the first T-shaped rod (30) is inserted into the inner cavity of the lock hole (31).

6. An eccentric hemispherical valve with both soft and hard seals as described in claim 1, characterized in that: The right side of the sleeve (13) is slidably connected to a second T-shaped rod (23), and a second spring (25) is sleeved on the outer wall of the second T-shaped rod (23). The two ends of the second spring (25) are fixedly connected to the sleeve (13) and the second T-shaped rod (23) respectively. The outer wall of the annular plate (22) is evenly provided with a number of insertion holes (24), and the longest end of the second T-shaped rod (23) is inserted into the inner cavity of one of the insertion holes (24).

7. An eccentric hemispherical valve with both soft and hard seals as described in claim 1, characterized in that: The ball valve housing (1) has an annular groove (10) at the top of its inner cavity, and a matching lower sealing ring (11) is provided at the bottom of the inner cavity of the annular groove (10). An upper sealing ring (12) is fitted to the top of the lower sealing ring (11), and the upper sealing ring (12) is fixedly connected to the sealing cover (9).

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