Fixed ball valve of high-pressure-resistant sealing structure

Abstract

The utility model discloses a fixed ball valve of a high-pressure-resistant sealing structure, and relates to the field of ball valves. The fixed ball valve of the high-pressure-resistant sealing structure comprises a valve body unit and a rotating unit arranged in the valve body unit, the valve body unit comprises a valve body main body, and a valve element, a valve seat, a flow guide table and a shielding barrel are rotationally arranged in the valve body main body; the valve seat is fixedly installed in the valve body, and the valve seat is attached to the outer side of the valve element. The flow guide table is fixedly installed at the water inlet end of the valve body. The shielding barrel is arranged on the inner wall of the flow guide table in a sliding mode, and the end of the shielding barrel shields a gap between the valve seat and the valve element. According to the fixed ball valve of the high-pressure-resistant sealing structure, initial sealing is achieved through precise matching of the valve element and the valve seat, meanwhile, the shielding barrel is automatically attached to a gap under the medium pressure, the self-adaptive effect that the larger the pressure is, the tighter the sealing is is achieved, and then a dual dynamic sealing mechanism is formed.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field, concretely is fixed ball valve of high pressure resistant sealing structure. BACKGROUND

[0002] In the field of petroleum, chemical industry and high pressure fluid control, the sealing structure of traditional fixed ball valve has significant defects.

[0003] The conventional design relies on the direct contact of the valve core and the valve seat to realize sealing, but under the working conditions of high pressure, high flow rate or strong medium corrosiveness, the single sealing structure is prone to leakage due to material fatigue, wear or impact. In addition, frequent opening and closing operation will accelerate the damage of the sealing surface and shorten the service life of the equipment. The existing improvement scheme is to increase the spring pre-tightening force or optimize the complex sealing layer, but it is difficult to balance the high pressure dynamic sealing requirement and long-term stability. SUMMARY

[0004] In view of the defects of the prior art, the utility model provides a fixed ball valve with high pressure resistant sealing structure, which solves the problem that the conventional ball valve design relies on the direct contact of the valve core and the valve seat to realize sealing, but under the working conditions of high pressure, high flow rate or strong medium corrosiveness, the single sealing structure is prone to leakage due to material fatigue, wear or impact. In addition, frequent opening and closing operation will accelerate the damage of the sealing surface and shorten the service life of the equipment.

[0005] To achieve the above purpose, the utility model realizes the following technical scheme: a fixed ball valve with high pressure resistant sealing structure, comprising a valve body unit and a rotating unit arranged in the valve body unit, the valve body unit comprises:

[0006] a valve body, a valve core is rotatably arranged in the valve body, and the valve core is rotated by the rotating unit to realize the opening and closing of the valve;

[0007] a valve seat fixedly installed in the inside of the valve body, and the valve seat is in contact with the outside of the valve core;

[0008] a flow guide table fixedly installed at the water inlet end of the valve body;

[0009] a shielding cylinder slidingly arranged on the inner wall of the flow guide table, and the end of the shielding cylinder shields the gap between the valve seat and the valve core.

[0010] Preferably, a moving groove is formed in the inner wall of the flow guide table.

[0011] Preferably, the shielding cylinder comprises:

[0012] a cylinder body in contact with the inner wall of the flow guide table;

[0013] a blocking ring fixedly connected with the end of the cylinder body, and the end of the blocking ring is provided with a circular arc surface.

[0014] Preferably, the other end of the barrel is fixedly connected with a push plate, and the medium enters the valve body and pushes the push plate to move horizontally.

[0015] Preferably, the outer side of the barrel is fixedly connected with a moving ring, and the moving ring is slidingly arranged on the inner wall of the moving groove.

[0016] Preferably, the rotating unit comprises:

[0017] a valve rod, which is rotatably arranged on the top of the valve body, and the bottom end of the valve rod is fixedly connected with the valve core;

[0018] a sealing packing, which is arranged between the valve body and the valve rod.

[0019] Preferably, the top of the valve rod extends upward and is fixedly connected with a rotating handle.

[0020] The utility model discloses a fixed ball valve of high pressure resistant sealing structure has the beneficial effect as follows: the fixed ball valve of high pressure resistant sealing structure, utilize valve core and valve seat precision cooperation realizes initial sealing, and the blocking barrel is automatically pasted the gap under the medium pressure, forms the self -adaptation effect of the greater pressure, the more tight sealing, and then forms double dynamic sealing mechanism, and the valve core rotates to and pastes the valve seat, and the medium pressure pushes the push plate of blocking barrel, makes the blocking ring closely pastes the valve core, and then through the valve core to the gap between valve seat and valve core, reduces the direct impact to the sealing area, when the valve core rotates, the rotating unit drives the valve core to rotate, and the valve core can extrude the blocking ring and move horizontally, until the passage of valve core and valve body flow channel are aligned, at this moment, the medium pressure pushes the push plate of blocking barrel, makes the blocking ring closely pastes the valve core again, reaches the effect of shielding protection. BRIEF DESCRIPTION OF DRAWINGS

[0021] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or prior art, the following will briefly introduce the drawings needed to be used in the embodiment or prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating creative labor.

[0022] Figure 1 It is the whole structure schematic view of the utility model;

[0023] Figure 2 It is the structure sectional view of the utility model;

[0024] Figure 3 It is the A part enlarged schematic view in the utility model Figure 2

[0025] Figure 4 It is the sectional view of the blocking barrel of the utility model.​

[0026] In the figure: 1, valve body unit; 11, valve body main body; 12, valve core; 13, valve seat; 14, flow guide platform; 141, moving groove; 15, shielding cylinder; 151, cylinder body; 152, blocking ring; 153, push plate; 154, moving ring; 2, rotating unit; 21, valve rod; 22, sealing packing; 23, rotating handle. DETAILED DESCRIPTION

[0027] In order to make the purpose, technical scheme and advantages of the embodiments of the present application more clear, the technical scheme in the embodiments of the present application is described clearly and completely. Obviously, the described embodiments are part of the embodiments of the present application, not all. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0028] The fixed ball valve with high-pressure-resistant sealing structure provided by the embodiments of the present application solves the problem that the conventional ball valve design relies on the direct contact between the valve core and the valve seat to achieve sealing, but in the working conditions of high pressure, high flow rate or strong corrosiveness of the medium, the single sealing structure is prone to leakage due to material fatigue, wear or impact. In addition, frequent opening and closing operations can accelerate the damage of the sealing surface and shorten the service life of the equipment. The embodiments of the present application utilize the precise fit between the valve core 12 and the valve seat 13 to achieve initial sealing, and the shielding cylinder 15 automatically fits the gap under the pressure of the medium to form a self-adaptive effect that the greater the pressure, the tighter the sealing, thereby forming a double dynamic sealing mechanism.

[0029] In order to better understand the above technical scheme, the above technical scheme will be described in detail below in combination with the drawings in the specification and specific embodiments.

[0030] Embodiment one

[0031] The embodiments of the present application disclose a fixed ball valve with high-pressure-resistant sealing structure.

[0032] According to the drawings Figures 1-4 As shown in the drawings, the fixed ball valve comprises a valve body unit 1 and a rotating unit 2 arranged in the valve body unit 1, and the valve body unit 1 comprises:

[0033] A valve body main body 11 is arranged with a valve core 12 inside, and the valve core 12 is rotated by the rotating unit 2 to realize the opening and closing of the valve;

[0034] A valve seat 13 is fixedly installed in the inside of the valve body main body 11, and the valve seat 13 is in close contact with the outside of the valve core 12;

[0035] A flow guide platform 14 is fixedly installed at the water inlet end of the valve body main body 11;

[0036] A shielding cylinder 15 is slidingly arranged on the inner wall of the flow guide platform 14, and the end of the shielding cylinder 15 shields the gap between the valve seat 13 and the valve core 12.

[0037] Further, a moving groove 141 is formed on the inner wall of the flow guide platform 14.

[0038] In particular, the shielding cylinder 15 comprises:

[0039] A cylinder body 151 is in close contact with the inner wall of the flow guide platform 14;

[0040] A blocking ring 152 is fixedly connected with the end of the cylinder body 151, and the end of the blocking ring 152 is provided as a circular arc surface.

[0041] Further, the other end of the cylinder body 151 is fixedly connected with a push plate 153, and the push plate 153 is pushed to move transversely in the valve body 11.

[0042] Further, a moving ring 154 is fixedly connected with the outer side of the cylinder body 151, and the moving ring 154 is slidingly arranged on the inner wall of the moving groove 141.

[0043] When the valve core 12 is rotated to be in close contact with the valve seat 13, the medium pressure pushes the push plate 153 of the shielding cylinder 15, so that the blocking ring 152 is closely attached to the valve core 12, and then the gap between the valve seat 13 and the valve core 12 is shielded by the valve core 12, thereby reducing the direct impact on the sealing area.

[0044] When the valve core 12 is rotated, the rotating unit 2 drives the valve core 12 to rotate by 90°, so that the valve core 12 can extrude the blocking ring 152 to move transversely until the channel of the valve core 12 is aligned with the flow passage of the valve body 11, at this time, the medium pressure pushes the push plate 153 of the shielding cylinder 15, so that the blocking ring 152 is closely attached to the valve core 12 again, thereby achieving the shielding and protection effect.

[0045] Embodiment two

[0046] The utility model discloses a fixed ball valve of high pressure resistant sealing structure.

[0047] According to the drawings Figures 1-4 As shown, comprising valve body unit 1 and setting rotating unit 2 in valve body unit 1, valve body unit 1 includes:

[0048] The valve body 11 is internally rotatably provided with the valve core 12, and the valve core 12 is rotated by the rotating unit 2 to realize the opening and closing of the valve;

[0049] The valve seat 13 is fixedly installed in the inner side of the valve body 11, and the valve seat 13 is in close contact with the outer side of the valve core 12.

[0050] The flow guide platform 14 is fixedly installed at the water inlet end of the valve body 11.

[0051] A shielding cylinder 15 is slidingly arranged on the inner wall of the flow guide platform 14, and the end of the shielding cylinder 15 shields the gap between the valve seat 13 and the valve core 12.

[0052] Further, the rotating unit 2 comprises:

[0053] A valve rod 21 is rotatably arranged on the top of the valve body 11, and the bottom end of the valve rod 21 is fixedly connected with the valve core 12.

[0054] A sealing packing 22 is arranged between the valve body 11 and the valve rod 21.

[0055] Further, the top of the valve rod 21 extends upward and is fixedly connected with a handle 23.

[0056] The valve rod 21 drives the valve core 12 to rotate by the top handle 23, the sealing packing 22 is selected to be a flexible graphite plus metal winding mode, and high-pressure resistant material is used to lubricate and seal.

[0057] The basic principle and main features of the utility model and the advantages of the utility model are shown and described above. It should be understood by those skilled in the art that the utility model is not limited by the above-mentioned embodiments, and the above-mentioned embodiments and the description in the specification are only to illustrate the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model can also have various changes and improvements, and these changes and improvements all fall within the scope of the utility model claimed. The scope of protection of the utility model is defined by the appended claims and their equivalents.

Claims

1. High-pressure-resistant fixed ball valve of the seal structure, comprising a valve body unit (1) and a rotating unit (2) arranged in the valve body unit (1), characterized in that, The valve body unit (1) comprises: a valve body (11) with a valve core (12) rotatably arranged inside, and the valve core (12) is rotated by a rotating unit (2) to open and close the valve; a valve seat (13) fixedly installed inside the valve body (11), and the valve seat (13) is in contact with the outer side of the valve core (12); a flow guide platform (14) fixedly installed at the water inlet end of the valve body (11); a shielding cylinder (15) slidingly arranged on the inner wall of the flow guide platform (14), and the end of the shielding cylinder (15) shields the gap between the valve seat (13) and the valve core (12).

2. The high-pressure sealable fixed ball valve according to claim 1, characterized in that A moving groove (141) is formed on the inner wall of the flow guide platform (14).

3. The high-pressure sealable fixed ball valve according to claim 1, wherein The shielding cylinder (15) comprises: a cylinder body (151) in contact with the inner wall of the flow guide platform (14); a blocking ring (152) fixedly connected with the end of the cylinder body (151), and the end of the blocking ring (152) is provided as a circular arc surface.

4. The high-pressure sealable fixed ball valve according to claim 3, characterized in that The other end of the cylinder body (151) is fixedly connected with a push plate (153), and the medium entering the valve body (11) pushes the push plate (153) to move horizontally.

5. The high-pressure seal, fixed ball valve of claim 3, wherein, The outer side of the cylinder body (151) is fixedly connected with a moving ring (154), and the moving ring (154) is slidingly arranged on the inner wall of the moving groove (141).

6. The high-pressure seal, fixed ball valve of claim 1, wherein, The rotating unit (2) comprises: a valve stem (21) rotatably arranged at the top of the valve body (11), and the bottom end of the valve stem (21) is fixedly connected with the valve core (12); a sealing packing (22) arranged between the valve body (11) and the valve stem (21).

7. The high-pressure seal, fixed ball valve of claim 6, wherein, The top of the valve stem (21) extends upward and is fixedly connected with a rotating handle (23).

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