High-pressure metal sealing ball valve

Abstract

The invention belongs to the field of ball valves, particularly relates to a high-pressure metal sealing ball valve, and provides the following scheme aiming at the problems that after being used for a long time, an existing filler is easily abraded with a valve rod to cause leakage, and the filler is not treated after being abraded and is difficult to keep sealed, the high-pressure metal sealing ball valve comprises a valve body and a valve core which rotates in the valve body, the top of the valve element is provided with a valve rod used for driving the valve element to rotate, the top of the valve body is fixedly connected with a middle pipe, the top of the middle pipe is provided with a driving piece used for driving the valve rod to rotate, the middle pipe is filled with filler used for sealing the valve rod, and a pressing plate is arranged above the filler. The packing and the valve rod are kept sealed, the ball valve is prevented from being disassembled, use is convenient, the packing can be conveniently replaced and added, the sealing effect is kept, the valve rod can be sealed during leakage, further leakage is prevented, and use safety is improved.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of ball valves, in particular to a high-pressure metal-sealed ball valve. BACKGROUND

[0002] The high-pressure metal-sealed ball valve adopts a metal sealing structure, the ball and the valve seat are subjected to special hardening treatment, are resistant to high temperature and high pressure, and are reliable in sealing and resistant to wear and erosion. The high-pressure metal-sealed ball valve is suitable for use in the fields of petroleum, chemical industry and electric power, can be operated electrically, pneumatically or manually, realizes rapid medium cutoff and regulation, and is a key equipment for controlling high-pressure fluid.

[0003] The existing high-pressure ball valve is usually sealed by a sealing gasket and packing, but the packing is prone to wear and tear between the valve stem after long-term use, resulting in leakage, and the packing is difficult to maintain sealing after wear and tear without treatment. In view of the above problems, the present application provides a high-pressure metal-sealed ball valve. SUMMARY

[0004] The present application provides a high-pressure metal-sealed ball valve, which solves the problem of packing wear and tear between the valve stem after long-term use, resulting in leakage, and the packing is difficult to maintain sealing after wear and tear without treatment.

[0005] The present application provides the following technical solutions:

[0006] A high-pressure metal-sealed ball valve, comprising a valve body and a valve core rotating in the valve body, the top of the valve core is provided with a valve stem for driving the rotation thereof, the top of the valve body is fixedly connected with an intermediate pipe, the top of the intermediate pipe is provided with a driving member for driving the rotation of the valve stem, the intermediate pipe is filled with packing for sealing the valve stem, the upper part of the packing is provided with a pressing plate, and the two sides of the intermediate pipe are both rotatably connected with a penetrating shaft, one end of the shaft is fixedly connected with an eccentric wheel, and the two eccentric wheels are symmetrically arranged and abut against the pressing plate.

[0007] One end of the shaft away from the eccentric wheel is fixedly connected with a swing rod, the swing rod is inclined and one side is provided with a penetrating driving groove;

[0008] A driving mechanism is arranged on one side of the intermediate pipe for driving the swing rod to swing and press the packing.

[0009] As a further scheme of the present application, the driving mechanism comprises a mounting seat fixed on one side of the intermediate pipe, one side of the mounting seat is rotatably connected with a penetrating screw rod, the mounting seat is slidably connected with a driving rod, the screw rod is threadedly penetrated through the driving rod, and the two ends of the driving rod are respectively slidably connected with the two driving grooves.

[0010] As a further scheme of the present application, the driving member comprises a mounting shell and a worm wheel, the mounting shell is fixed on the top of the intermediate pipe, the worm wheel is fixed on the top of the valve rod and located in the mounting shell, a worm is rotatably connected in the mounting shell, and the worm is engaged with the worm wheel.

[0011] As a further scheme of the present application, the intermediate pipe is fixedly connected with a fixed plate, granular bentonite is arranged above the fixed plate, and a plurality of through holes are formed in the bottom of the fixed plate.

[0012] As a further scheme of the present application, one side of the intermediate pipe is fixedly connected with a mounting cylinder, the mounting cylinder is located on one side of the bentonite, a plug is slidably connected in the mounting cylinder, one side of the plug is fixedly connected with a push rod, a fixed seat is fixedly connected to the inner wall of the top of the mounting cylinder, a indicating rod is rotatably connected to the bottom of the fixed seat, an avoiding opening is formed in one end of the mounting cylinder, the indicating rod passes through the avoiding opening, and the push rod is located on one side of the indicating rod and pushes the indicating rod to rotate when the plug moves.

[0013] As a further scheme of the present application, one side of the intermediate pipe is fixedly connected with a feeding cylinder, and an end cover is threadedly connected to one end of the feeding cylinder.

[0014] As a further scheme of the present application, a through fixed bolt is threadedly connected to one side of the end cover, a push plate is fixedly connected to one end of the fixed bolt, and the push plate slides with the feeding cylinder.

[0015] As a further scheme of the present application, a through top screw is threadedly connected to the top of the mounting seat, and the top screw abuts against the screw rod.

[0016] As a further scheme of the present application, one end of the worm is fixedly connected with a hand wheel.

[0017] It should be understood that the above general description and the following detailed description are only exemplary and cannot limit the present application.

[0018] In the present application, the filler can be extruded, so that after the filler is worn, the driving eccentric wheel is rotated to press the filler downward, so that the filler remains sealed with the valve rod, avoiding disassembly of the ball valve, and facilitating use.

[0019] In the present application, the feeding cylinder is arranged on one side of the intermediate pipe, so that the filler filled in the feeding cylinder can be pushed into the intermediate pipe by the push plate, and the filler in the feeding cylinder can also be taken out, thereby facilitating the addition of new filler and maintaining the sealing effect.

[0020] In the present application, the bentonite is added in the intermediate pipe, so that the bentonite expands after being contacted with water, thereby sealing the valve rod and preventing further leakage, and improving the safety in use.

[0021] In the application, the swelling soil extruding plug is set by the indicating rod, the plug moves to drive the push rod to move, the push rod pushes the indicating rod to rotate, so that the indicating rod is horizontal, and the staff is prompted;

[0022] In the application, the filler can be manually pressed down to keep sealing between the filler and the valve rod, avoid disassembling the ball valve, facilitate use, and facilitate replacement and addition of the filler, keep the sealing effect, and can seal the valve rod when leaking to prevent further leakage, improve the safety of use. BRIEF DESCRIPTION OF DRAWINGS

[0023] Figure 1 A three-dimensional structural schematic diagram of a high-pressure metal-sealed ball valve provided by an embodiment of the application is provided.

[0024] Figure 2 A cross-sectional structural schematic diagram of a high-pressure metal-sealed ball valve provided by an embodiment of the application is provided.

[0025] Figure 3 A cross-sectional structural schematic diagram of a high-pressure metal-sealed ball valve provided by an embodiment of the application is provided.

[0026] Figure 4 A high-pressure metal-sealed ball valve provided by an embodiment of the application is provided. Figure 3 An enlarged structural schematic diagram of part A is provided.

[0027] Figure 5 Another perspective structural schematic diagram of a high-pressure metal-sealed ball valve provided by an embodiment of the application is provided. Figure 3 Another perspective structural schematic diagram of a high-pressure metal-sealed ball valve provided by an embodiment of the application is provided.

[0028] REFERENCE NUMERALS:

[0029] 1, valve body; 2, intermediate pipe; 3, mounting shell; 4, worm gear; 5, worm; 6, valve core; 7, valve rod; 8, pressing plate; 9, filler; 10, fixed plate; 11, perforation; 12, swelling soil; 13, rotating shaft; 14, eccentric wheel; 15, swing rod; 16, mounting cylinder; 17, fixed seat; 18, indicating rod; 19, avoiding port; 20, plug; 21, push rod; 22, mounting seat; 23, driving groove; 24, driving rod; 25, screw rod; 26, feeding cylinder; 27, end cover; 28, push plate; 29, fixed bolt. DETAILED DESCRIPTION

[0030] The embodiments of the application will be described below with reference to the accompanying drawings.

[0031] In the description of the embodiments of the present application, it should be noted that unless specifically defined and limited otherwise, the terms "connect", "mount" should be understood broadly, for example, "connect" can be detachable connection, or can be non-detachable connection, can be direct connection, or can be indirect connection through intermediate medium. In addition, "communication" can be direct communication, or can be indirect communication through intermediate medium. Among them, "fixed" means connected to each other and the relative position relationship after connection does not change. The orientation language mentioned in the embodiments of the present application, such as "inner", "outer", "top", "bottom" and the like, is only the direction of the drawing, therefore, the orientation language used is for better and clearer illustration and understanding of the embodiments of the present application, and is not indicative or implied that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, therefore, it cannot be understood as a limitation on the embodiments of the present application.

[0032] In this specification, the reference "one embodiment" or "some embodiments" and the like means that a specific feature, structure or characteristic described in connection with the embodiment is included in at least one embodiment of the present application. Therefore, the statements "in one embodiment", "in some embodiments", "in other embodiments", "in additional embodiments" and the like appearing in various places in the specification are not necessarily all referring to one and the same embodiment, but can refer to one or more but not all embodiments, unless otherwise specifically stated. The terms "include", "comprise", "have" and their variants mean "including but not limited to", unless otherwise specifically stated.

[0033] Embodiment 1

[0034] With reference to Figures 1-5 A high-pressure metal-sealed ball valve, a valve body 1 and a valve core 6 rotating inside the valve body 1, a valve rod 7 for driving the rotation of the valve core 6 is installed on the top of the valve core 6, rotating the valve rod 7 drives the valve core 6 to rotate, the top of the valve body 1 is fixedly connected with an intermediate pipe 2, a driving piece for driving the valve rod 7 to rotate is arranged on the top of the intermediate pipe 2, the intermediate pipe 2 is filled with a packing 9 for sealing the valve rod 7, a pressing plate 8 is arranged above the packing 9, in addition to the packing 9, a sealing ring is further arranged below to seal the valve rod 7, a penetrating rotating shaft 13 is rotatably connected to both sides of the intermediate pipe 2, the rotating shaft 13 and the intermediate pipe 2 are sealingly arranged, an eccentric wheel 14 is fixedly connected to one end of the rotating shaft 13, the two eccentric wheels 14 are symmetrically arranged and abut against the pressing plate 8, rotating the eccentric wheel 14 can press the packing 9 downward, so that the packing 9 is kept sealed with the valve rod 7, avoiding disassembling the ball valve, facilitating use;

[0035] One end of the rotating shaft 13 away from the eccentric wheel 14 is fixedly connected with a swing rod 15, the swing rod 15 is obliquely arranged and a penetrating driving groove 23 is formed in one side of the swing rod 15, the swing rod 15 is used to drive the rotating shaft 13 to work;

[0036] A driving mechanism is arranged on one side of the intermediate pipe 2 for driving the swing lever 15 to swing and press the filler 9.

[0037] Embodiment 2

[0038] With reference to Figures 1-5 On the basis of the embodiment 1, a high-pressure metal seal ball valve is improved, the driving mechanism comprises a mounting seat 22 fixed on one side of the intermediate pipe 2, one side of the mounting seat 22 is rotatably connected with a penetrating screw rod 25, the mounting seat 22 is slidably connected with a driving rod 24, the screw rod 25 is threadedly penetrated through the driving rod 24, two ends of the driving rod 24 are slidably connected with two driving grooves 23 respectively, the screw rod 25 is rotated to drive the driving rod 24 to rotate, the driving rod 24 slides in the driving grooves 23, and then the swing lever 15 is driven to rotate, and the swing lever 15 drives the rotating shaft 13 and the eccentric wheel 14 to rotate.

[0039] In the application, the driving member comprises a mounting shell 3 and a worm wheel 4, the mounting shell 3 is fixed on the top of the intermediate pipe 2, the worm wheel 4 is fixed on the top of the valve rod 7 and located in the mounting shell 3, the mounting shell 3 is rotatably connected with a worm 5, the worm 5 is engaged with the worm wheel 4, the worm 5 is rotated to drive the worm wheel 4 to rotate, the worm wheel 4 drives the valve rod 7 to rotate, thereby controlling the valve core 6 to rotate and controlling the opening and closing of the pipeline.

[0040] Especially, the intermediate pipe 2 is fixedly connected with a fixed plate 10, the fixed plate 10 is provided with granular bentonite 12 above, a plurality of penetrating perforations 11 are formed in the bottom of the fixed plate 10, when liquid leaks, the liquid enters the upper side of the fixed plate 10 through the perforations 11, the bentonite 12 expands after meeting water, thereby sealing the valve rod 7 and preventing further leakage.

[0041] It should be noted that one side of the intermediate pipe 2 is fixedly connected with a mounting cylinder 16, the mounting cylinder 16 is located on one side of the bentonite 12, the mounting cylinder 16 is slidably connected with a plug 20, one side of the plug 20 is fixedly connected with a push rod 21, a fixing seat 17 is fixedly connected to the inner wall of the top of the mounting cylinder 16, a indicating rod 18 is rotatably connected to the bottom of the fixing seat 17, an avoiding opening 19 is formed in one end of the mounting cylinder 16, the indicating rod 18 penetrates through the avoiding opening 19, the push rod 21 is located on one side of the indicating rod 18 and pushes the indicating rod 18 to rotate when the plug 20 moves, the plug 20 moves to drive the push rod 21 to move when the bentonite 12 expands, the push rod 21 pushes the indicating rod 18 to rotate, so that the indicating rod 18 is horizontal and prompts the staff.

[0042] In the application, one side of the intermediate pipe 2 is fixedly connected with a feeding cylinder 26, one end of the feeding cylinder 26 is threadedly connected with an end cover 27, the end cover 27 is opened, and the filler 9 can be added through the feeding cylinder 26.

[0043] Especially, one side of the end cover 27 is threadedly connected with a penetrating fixing pin 29, one end of the fixing pin 29 is fixedly connected with a push plate 28, the push plate 28 slides with the filling cylinder 26, the fixing pin 29 is rotated, and then the filler 9 can be pushed into the intermediate pipe 2 through the push plate 28.

[0044] In the application, the top of the mounting seat 22 is threadedly connected with a penetrating top screw, the top screw is in contact with the screw rod 25, and the top screw can fix the screw rod 25.

[0045] Especially, one end of the worm 5 is fixedly connected with a hand wheel, and the hand wheel facilitates rotation of the worm 5.

[0046] The working principle and use process of the technical solution are as follows: when in use, the worm 5 is rotated through the hand wheel, the worm wheel 4 is driven to rotate, the valve rod 7 is driven to rotate through the worm wheel 4, and the valve core 6 is controlled to rotate, so that the opening and closing of the pipeline are controlled;

[0047] When the valve rod 7 rotates, the filler 9 is used for sealing the valve rod 7, when the filler 9 is worn, the screw rod 25 is rotated, the driving rod 24 is driven to rotate through the screw rod 25, the driving rod 24 slides in the driving groove 23, and then the swing rod 15 is pushed to rotate, the swing rod 15 drives the rotating shaft 13 and the eccentric wheel 14 to rotate, the filler 9 is pressed down through the eccentric wheel 14, the filler 9 is kept sealed with the valve rod 7, the ball valve is avoided to be disassembled, and use is facilitated;

[0048] When the filler 9 is worn and reduced, the end cover 27 is removed, the filler is put into the filling cylinder 26, the end cover 27 is reset, the fixing pin 29 is rotated, and then the filler is pushed into the intermediate pipe 2 through the push plate 28, and the filler 9 in the inside can also be taken out through the filling cylinder 26, so that new filler 9 can be conveniently added, and the sealing effect is maintained;

[0049] When the liquid leaks, the perforation 11 enters the upper side of the fixed plate 10, the bentonite 12 expands after meeting water, and then the bentonite 12 seals the valve rod 7, so that further leakage is prevented, the safety in use is improved, when the bentonite 12 expands, the bentonite 12 extrudes the plug 20, the plug 20 moves to drive the push rod 21 to move, the push rod 21 pushes the indicating rod 18 to rotate, the indicating rod 18 is horizontal, and the staff is prompted.

[0050] The above is only a specific embodiment of the application, but the protection scope of the application is not limited to this, any person skilled in the art can easily think of changes or replacements within the technical range disclosed by the application, and all should be covered in the protection scope of the application; in the case of no conflict, the embodiments of the application and the features in the embodiments can be combined with each other. Therefore, the protection scope of the application should be subject to the protection scope of the claims.

Claims

1. A high-pressure metal-sealed ball valve, characterized in that, include: A valve body (1) and a valve core (6) that rotates inside the valve body (1). A valve stem (7) for driving the valve core (6) to rotate is installed on the top of the valve core (6). An intermediate tube (2) is fixedly connected to the top of the valve body (1). A driving component is provided on the top of the intermediate tube (2) for driving the valve stem (7) to rotate. The intermediate tube (2) is filled with packing (9) for sealing the valve stem (7). A pressure plate (8) is provided above the packing (9). A through shaft (13) is rotatably connected to both sides of the intermediate tube (2). An eccentric wheel (14) is fixedly connected to one end of the shaft (13). The two eccentric wheels (14) are symmetrically arranged and abut against the pressure plate (8). The end of the rotating shaft (13) away from the eccentric wheel (14) is fixedly connected to a swing rod (15). The swing rod (15) is inclined and has a through drive groove (23) on one side. A drive mechanism is provided on one side of the intermediate tube (2) to drive the swing rod (15) to swing and thus squeeze the packing (9).

2. The high-pressure metal-sealed ball valve according to claim 1, characterized in that, The driving mechanism includes a mounting base (22), which is fixed on one side of the intermediate tube (2). A through lead screw (25) is rotatably connected to one side of the mounting base (22). A driving rod (24) is slidably connected inside the mounting base (22). The lead screw (25) is threaded through the driving rod (24). The two ends of the driving rod (24) are slidably connected to two driving grooves (23) respectively.

3. A high-pressure metal-sealed ball valve according to claim 1, characterized in that, The driving component includes a mounting shell (3) and a worm gear (4). The mounting shell (3) is fixed to the top of the intermediate tube (2). The worm gear (4) is fixed to the top of the valve stem (7) and located inside the mounting shell (3). A worm (5) is rotatably connected inside the mounting shell (3). The worm (5) meshes with the worm gear (4).

4. A high-pressure metal-sealed ball valve according to claim 1, characterized in that, A fixing plate (10) is fixedly connected inside the intermediate tube (2). Granular bentonite (12) is placed above the fixing plate (10). Multiple through holes (11) are opened at the bottom of the fixing plate (10).

5. A high-pressure metal-sealed ball valve according to claim 4, characterized in that, One side of the intermediate tube (2) is fixedly connected to an installation cylinder (16), which is located on one side of the bentonite (12). A plug (20) is slidably connected inside the installation cylinder (16), and a push rod (21) is fixedly connected to one side of the plug (20). A fixed seat (17) is fixedly connected to the top inner wall of the installation cylinder (16), and an indicator rod (18) is rotatably connected to the bottom of the fixed seat (17). A clearance opening (19) is opened at one end of the installation cylinder (16), and the indicator rod (18) passes through the clearance opening (19). The push rod (21) is located on one side of the indicator rod (18) and pushes the indicator rod (18) to rotate when the plug (20) moves.

6. A high-pressure metal-sealed ball valve according to claim 1, characterized in that, The middle tube (2) is fixedly connected to a feeding cylinder (26) on one side, and an end cap (27) is threadedly connected to one end of the feeding cylinder (26).

7. A high-pressure metal-sealed ball valve according to claim 6, characterized in that, One side of the end cap (27) is threaded with a through fixing bolt (29), and one end of the fixing bolt (29) is fixedly connected with a push plate (28), which slides with the feeding cylinder (26).

8. A high-pressure metal-sealed ball valve according to claim 2, characterized in that, The top of the mounting base (22) is threaded with a through-hole set screw, which abuts against the screw rod (25).

9. A high-pressure metal-sealed ball valve according to claim 3, characterized in that, A handwheel is fixedly connected to one end of the worm gear (5).

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