Top-mounted hard seal opening type ball valve

Abstract

The utility model relates to the technical field of opening type ball valves, and provides a top-mounted hard seal opening type ball valve which is characterized in that a sealing assembly is arranged at the communication position of a pipe body and a valve seat, when the ball valve rotates along with a valve rod to be closed, a forward and reverse motor can be started, and the output end of the forward and reverse motor drives a rotating shaft and a gear to rotate; at the moment, a tooth groove plate meshed at the bottom of the gear synchronously moves along with meshing rotation of the gear and drives a sealing sliding seat at the bottom of the tooth groove plate to push towards one side of the ball valve until the gear on one side of the sealing sliding seat and the ball valve are closed and sealed; and the sliding plate and the pin roller are annularly arranged at the bottom of the outer side of the sealing sliding seat, so that the moving resistance of the sealing sliding seat in the pipe body cavity is reduced, and the situation that the liquid medium leaks from the pipe body and the ball valve can be effectively reduced through the design.

Description

Technical Field

[0001] The utility model relates to the technical field of expansion type ball valves, and in particular to a top mounted hard sealing expansion type ball valve. Background Art

[0002] The ball valve is a valve in which the opening and closing part (ball) is driven by the valve stem and rotates around the axis of the ball valve. It can also be used for fluid regulation and control. The hard-sealed V-type ball valve has a strong shear force between its V-type ball core and the metal valve seat with hard alloy surfacing, which is particularly suitable for media containing fibers, tiny solid particles, etc. How to improve the opening and closing sealing of the ball valve is a problem that needs to be solved urgently.

[0003] After searching, the announcement number CN202418688U discloses a propped-open metal hard-sealed ball valve, including a valve body, a valve disc is arranged in the valve body, a valve cover is arranged on the top of the valve body, the valve disc is a three-piece assembly, the middle body is a wedge-shaped cone, a ball segment is arranged on each of the inclined surfaces on both sides of the wedge-shaped cone, the wedge-shaped cone is connected to the ball segment through a dovetail groove or a T-shaped groove, a pressure ring is arranged above the ball segment, an adjustment ring is arranged below the ball segment, and the wedge-shaped cone is connected to the valve stem through a thread and a cylindrical pin. The beneficial effects of this utility model: no friction between the sealing surfaces during opening and closing, small opening torque; top-mounted structure, reducing external leakage points.

[0004] However, the above-mentioned expanded metal hard-sealed ball valve does not have a closed sealing design between the pipeline and the valve disc, which easily leads to leakage of liquid medium from the valve and the pipeline connection during the opening and closing of the valve disc with the valve stem. Utility Model Content

[0005] The utility model provides a top-mounted hard-sealed propped ball valve, which solves the problem that the prior art does not have a closed sealing design between the pipeline and the valve disc, which easily leads to leakage of liquid medium from the valve and the pipeline connection during the opening and closing of the valve disc with the valve stem 11.

[0006] The technical solution of the utility model is as follows: a top-mounted hard-sealed open ball valve, comprising a valve seat, a valve stem arranged on the top of the valve seat, and a ball valve arranged in a valve seat cavity and rotating synchronously with the valve stem, characterized in that an inner connecting pipe fitting is symmetrically arranged at the lower outer side of the valve seat, the inner connecting pipe fitting comprises a tube body, the tube body is welded to one side of the valve seat and is connected to the valve seat cavity, a driving assembly is arranged on the top of the tube body, the driving assembly comprises a forward and reverse motor for driving forward and reverse rotation, the driving assembly also comprises a gear, the gear rotates synchronously with the forward and reverse motor drive, a sealing assembly is arranged in the tube body cavity, the sealing assembly comprises a sealing slide, a toothed plate is fixedly connected to the top of the sealing slide, the toothed plate is meshed with the gear, and the sealing slide can complete the moving closed seal in the tube body cavity through the toothed plate and under the meshing rotation of the gear.

[0007] Preferably, a waterproof seat is fixedly connected to the top of the tube body, and three groups of rail grooves are formed in a ring shape on the inner wall of the tube body.

[0008] Preferably, the forward and reverse motors are fixedly mounted on the outside of the waterproof seat, and the output ends of the forward and reverse motors are fixedly connected to a rotating shaft, which passes through a slot on one side of the waterproof seat and is fixedly connected to a gear.

[0009] Preferably, three groups of slide plates are fixedly connected in an annular shape to the lower portion of the outer surface of the sealing slide seat, and the number and position of the slide plates correspond to the rail grooves.

[0010] Preferably, six groups of rotatable rollers are arranged at equal intervals at the bottom of the slide plate, and the rollers are fitted with the rail grooves.

[0011] Preferably, a first sealing ring is fixedly connected to the front of the sealing slide, the first sealing ring matches the ball valve, and a second sealing ring is fixedly connected to the lower part of the front of the sealing slide, the second sealing ring corresponds to the position of the slide.

[0012] Preferably, the tube body is provided with an external connecting pipe on a side away from the valve seat, and the external connecting pipe is fixedly connected with a first flange on a side close to the tube body, and a threaded groove is formed in an annular shape on the front side of the first flange.

[0013] Preferably, the tube body is fixedly connected to a second flange on the side away from the valve seat, and the front side of the second flange is provided with a ring-shaped thread groove that matches the specifications and quantity of the first flange, and the inner thread groove of the second flange is threadedly connected with a bolt, and the bolt passes through the thread groove on the front side of the first flange and a nut is threadedly connected at the end of the bolt.

[0014] The beneficial effects of the utility model are:

[0015] The utility model provides a sealing component at the connection point between the pipe body and the valve seat. When the ball valve is closed with the rotation of the valve stem, the forward and reverse motors can be started, so that the output ends of the forward and reverse motors drive the rotating shaft and the gears to rotate. At this time, the toothed plate meshed at the bottom of the gear moves synchronously with the meshing rotation of the gear and drives the sealing slide at the bottom of the toothed plate to advance toward one side of the ball valve until the gear on one side of the sealing slide completes the closed seal with the ball valve. In addition, a slide plate and a roller are provided in an annular shape at the bottom of the outer side of the sealing slide to reduce the movement resistance of the sealing slide in the pipe body cavity. Through this design, leakage of liquid medium from the pipe body and the ball valve can be effectively reduced. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] The present invention will be further described in detail below in conjunction with the accompanying drawings and specific implementation methods.

[0017] Figure 1 It is a schematic diagram of the side section structure of the overall device of the utility model;

[0018] Figure 2 It is a schematic diagram of the connection between the pipe body and the external connecting pipe structure of the utility model;

[0019] Figure 3 This is a schematic diagram of the separation of the pipe body and the external connecting pipe structure of the utility model;

[0020] Figure 4 This is a schematic diagram of the structure of the drive assembly of the utility model;

[0021] Figure 5 This is a schematic diagram of the sealing assembly structure of the utility model;

[0022] In the figure: 1. valve seat; 11. valve stem; 12. ball valve; 2. external connecting pipe; 21. first flange; 3. internal connecting pipe; 31. pipe body; 311. rail groove; 32. waterproof seat; 33. second flange; 331. bolt; 332. nut; 4. drive assembly; 41. forward and reverse motor; 42. rotating shaft; 43. gear; 5. sealing assembly; 51. sealing slide; 52. toothed plate; 53. slide plate; 531. roller; 54. first sealing ring; 55. second sealing ring. DETAILED DESCRIPTION

[0023] The following will be combined with the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figure 4 and Figure 5The utility model provides a technical solution: a top mounted hard seal open ball valve, comprising a valve seat 1, a valve stem 11 arranged on the top of the valve seat 1, and a ball valve 12 arranged in the cavity of the valve seat 1 and rotating synchronously with the valve stem 11, characterized in that an inner connecting pipe 3 is symmetrically arranged at the lower outer side of the valve seat 1, the inner connecting pipe 3 comprises a pipe body 31, the pipe body 31 is welded to one side of the valve seat 1 and communicated with the cavity of the valve seat 1, a driving assembly 4 is arranged on the top of the pipe body 31, the driving assembly 4 comprises a forward and reverse motor 41 for driving forward and reverse rotation, the driving assembly 4 also comprises a gear 43, the gear 43 rotates with The forward and reverse motors 41 drive the synchronous rotation, and a sealing assembly 5 is arranged in the cavity of the tube body 31. The sealing assembly 5 includes a sealing slide 51. A toothed plate 52 is fixedly connected to the top of the sealing slide 51. The toothed plate 52 is meshed with the gear 43. The sealing slide 51 can move and close the cavity of the tube body 31 through the toothed plate 52 and under the meshing and rotation of the gear 43. This design solves the problem that the prior art does not have a closed sealing design between the pipeline and the valve disc, which easily causes the liquid medium to leak from the valve and the pipeline connection during the opening and closing of the valve disc with the valve stem 11.

[0025] See also Figure 2 and Figure 3 A waterproof seat 32 is fixedly connected to the top of the tube body 31 , and three groups of rail grooves 311 are formed in an annular shape on the inner wall of the tube body 31 , and the waterproof seat 32 can prevent the medium in the tube body 31 from flowing out.

[0026] See also Figure 4 and Figure 5 The forward and reverse motor 41 is fixedly installed on the outside of the waterproof seat 32, and the output end of the forward and reverse motor 41 is fixedly connected with a rotating shaft 42. The rotating shaft 42 passes through the slot on one side of the waterproof seat 32 and is fixedly connected with the gear 43. The forward and reverse motor 41 is started, so that the output end of the forward and reverse motor 41 drives the rotating shaft 42 and the gear 43 to rotate. At this time, the toothed plate 52 meshed at the bottom of the gear 43 moves synchronously with the meshing rotation of the gear 43 and drives the sealing slide seat 51 at the bottom of the toothed plate 52 to advance to the side of the ball valve 12 until the gear 43 on one side of the sealing slide seat 51 is aligned with the ball valve 12. 12 completes the closed seal, three groups of slide plates 53 are fixedly connected in an annular shape to the lower part of the outer surface of the sealing slide 51, the number and position of the slide plates 53 correspond to the rail groove 311, and six groups of rotatable rollers 531 are evenly spaced at the bottom of the slide plate 53, and the rollers 531 fit the rail groove 311. The slide plates 53 and the rollers 531 are arranged in an annular shape at the bottom of the outer side of the sealing slide 51 to reduce the movement resistance of the sealing slide 51 in the cavity of the tube body 31. This design can effectively reduce the leakage of liquid medium from the tube body 31 and the ball valve 12.

[0027] See also Figure 5A first sealing ring 54 is fixedly connected to the front of the sealing slide 51, and the first sealing ring 54 matches the ball valve 12. A second sealing ring 55 is fixedly connected to the lower front of the sealing slide 51, and the second sealing ring 55 corresponds to the position of the slide plate 53. This design can increase the sealing performance after the two come into contact.

[0028] See also Figure 3 The tube body 31 is provided with an external connecting pipe 2 on the side away from the valve seat 1, and the external connecting pipe 2 is fixedly connected to the first flange 21 on the side close to the tube body 31. The front side of the first flange 21 is provided with a threaded groove in the form of an annular ring. The tube body 31 is fixedly connected to the second flange 33 on the side away from the valve seat 1. The front side of the second flange 33 is provided with a threaded groove in the form of an annular ring that matches the specifications and quantity of the first flange 21. The inner thread groove of the second flange 33 is threadedly connected with a bolt 331, and the bolt 331 passes through the threaded groove on the front side of the first flange 21 and a nut 332 is threadedly connected at the end of the bolt 331. Through this design, when the sealing assembly 5 is damaged during later use, the tube body 31 and the external connecting pipe 2 can be disassembled and assembled for maintenance.

[0029] The working principle and use process of the utility model are as follows:

[0030] By providing a sealing assembly 5 at the connection point between the tube body 31 and the valve seat 1, when the ball valve 12 rotates with the valve stem 11 to complete closing, the forward and reverse motor 41 can be started, so that the output end of the forward and reverse motor 41 drives the rotating shaft 42 and the gear 43 to rotate. At this time, the tooth plate 52 meshed at the bottom of the gear 43 moves synchronously with the meshing rotation of the gear 43 and drives the sealing slide 51 at the bottom of the tooth plate 52 to advance toward the side of the ball valve 12 until the gear 43 on one side of the sealing slide 51 completes the closed seal with the ball valve 12, and by providing a slide plate 53 and a roller 531 in an annular shape at the bottom of the outer side of the sealing slide 51 to reduce the movement resistance of the sealing slide 51 in the cavity of the tube body 31, the design can effectively reduce the leakage of liquid medium from the tube body 31 and the ball valve 12. In particular, when the sealing assembly 5 is damaged during long-term use, the bolts 331 and the nuts 332 can be used to complete the disassembly and maintenance of the tube body 31 and the external connecting pipe 2.

[0031] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A top mounted hard seal expansion type ball valve, comprising a valve seat (1), a valve stem (11) arranged on the top of the valve seat (1), and a ball valve (12) arranged in a cavity of the valve seat (1) and rotating synchronously with the valve stem (11), characterized in that: An inner connecting pipe (3) is symmetrically arranged below the outer side of the valve seat (1), the inner connecting pipe (3) comprising a pipe body (31), the pipe body (31) being welded to one side of the valve seat (1) and communicating with the cavity of the valve seat (1), a driving assembly (4) being arranged on the top of the pipe body (31), the driving assembly (4) comprising a forward and reverse motor (41) for driving forward and reverse rotation, the driving assembly (4) further comprising a gear (43), the gear (43) rotating synchronously with the forward and reverse motor (41), a sealing assembly (5) being arranged in the cavity of the pipe body (31), the sealing assembly (5) comprising a sealing slide (51), a toothed plate (52) being fixedly connected to the top of the sealing slide (51), the toothed plate (52) being meshed with the gear (43), the sealing slide (51) being able to move and seal in the cavity of the pipe body (31) through the toothed plate (52) and under the meshing rotation of the gear (43).

2. A top mounted hard seal expansion type ball valve according to claim 1, characterized in that: A waterproof seat (32) is fixedly connected to the top of the tube body (31), and three groups of rail grooves (311) are formed in a ring-shaped inner wall of the tube body (31).

3. A top mounted hard seal expansion ball valve according to claim 1, characterized in that: The forward and reverse motor (41) is fixedly mounted on the outside of the waterproof seat (32); the output end of the forward and reverse motor (41) is fixedly connected to a rotating shaft (42); the rotating shaft (42) passes through a slot on one side of the waterproof seat (32) and is fixedly connected to a gear (43).

4. A top mounted hard seal expansion ball valve according to claim 1, characterized in that: Three groups of slide plates (53) are fixedly connected in an annular shape to the lower portion of the outer surface of the sealing slide seat (51), and the number and position of the slide plates (53) correspond to the rail grooves (311).

5. A top mounted hard seal expansion type ball valve according to claim 4, characterized in that: Six groups of rotatable rollers (531) are arranged at equal intervals at the bottom of the slide plate (53), and the rollers (531) are fitted in the rail groove (311).

6. A top mounted hard seal expansion type ball valve according to claim 5, characterized in that: A first sealing ring (54) is fixedly connected to the front of the sealing sliding seat (51), and the first sealing ring (54) matches the ball valve (12). A second sealing ring (55) is fixedly connected to the lower part of the front of the sealing sliding seat (51), and the second sealing ring (55) corresponds to the position of the sliding plate (53).

7. The top mounted hard seal expansion ball valve according to claim 1, characterized in that: The tube body (31) is provided with an external connection pipe (2) on a side away from the valve seat (1); the external connection pipe (2) is fixedly connected to a first flange (21) on a side close to the tube body (31); and the first flange (21) has a circular threaded groove extending through the front side.

8. The top mounted hard seal expansion type ball valve according to claim 1, characterized in that: The tube body (31) is fixedly connected to a second flange (33) on a side away from the valve seat (1); the front side of the second flange (33) is provided with a threaded groove in the shape of an annular ring, the threaded groove matching the specifications and quantity of the first flange (21); a bolt (331) is threadedly connected to the inner threaded groove of the second flange (33); the bolt (331) passes through the threaded groove on the front side of the first flange (21) and a nut (332) is threadedly connected to the end of the bolt (331).

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