A ball valve with multiple sealing structures

Abstract

The present invention discloses a ball valve with a multi-sealing structure, comprising a valve body and a material guide tube, wherein the material guide tube comprises an inner tube, an outer tube and two end covers, the two end covers are arranged at the two ends of the outer tube in opposite directions, the inner tube is located inside the outer tube, the upper and lower ends of the inner tube are respectively sealed with the upper and lower end covers through a group of sealing structures, the parts in the sealing structure can be replaced so that the valve body and the material guide tube form a high-temperature resistant type, a normal-temperature shear-resistant type and a normal-temperature soft-sealing type, and suitable parts can be selected according to customer needs and usage scenarios when the present invention is produced and assembled, thereby improving the scope of application of the present invention; the present invention is provided with a sealer for sealing the two openings of the valve body, and the staff only needs to pump air into the end covers to prevent side leakage, thereby reducing the quality inspection process, and the sealer is disposable and cannot be restored after opening, thereby increasing the difficulty of the present invention being counterfeited and refurbished.

Description

Technical Field

[0001] The invention relates to the technical field of ball valves, and in particular to a ball valve with a multi-sealing structure. Background Art

[0002] A ball valve is a device that controls the direction of liquid flow by controlling the rotation angle of the valve ball inside it.

[0003] At present, the seals in valves are limited, that is, a product will only have one set of sealing components, which will limit the application scope of the valve. For example, a valve that is suitable for leak-proofing with a rubber seal ring is not suitable for high-temperature environments. If ceramic seal rings are used uniformly, the manufacturing cost of the valve will be increased. In addition, the installation space required for rubber seal rings and ceramic seal rings is generally different, so they are generally not interchangeable.

[0004] The above problems will affect the application scope of a valve model.

[0005] Secondly, currently valves are generally sealed with recessed plastic parts to prevent dust from entering the valve. When it is necessary to conduct random inspections on valves in the finished product warehouse or conduct pre-shipment inspections, the staff also need to remove the plastic parts and bring them back to the workshop for inspection, making the quality inspection process more cumbersome. Summary of the invention

[0006] In view of the deficiencies in the prior art, the present invention provides a ball valve with a multi-seal structure to solve the problems that the seals inside the ball valve are not universal, which reduces the application scope of the ball valve and makes the quality inspection process of the finished ball valve complicated.

[0007] The present invention provides the following technical solutions: a multi-seal structure ball valve, comprising a valve body, a flow channel is provided in the valve body, and a valve ball for controlling the flow direction of the fluid in the flow channel is provided in the flow channel, the valve ball is connected to a valve stem extending outside the valve body, and further comprising a material guide pipe that can be connected to the flow channel through a connecting component, the material guide pipe comprises an inner tube, an outer tube and two end covers, the two end covers are arranged in opposite directions and are respectively located at the two ends of the outer tube, the inner tube is located in the outer tube, the two end covers are respectively connected to the upper and lower ends of the inner tube through a set of fixing components, and the upper and lower ends of the inner tube are respectively sealed with the upper and lower end covers through a set of sealing structures;

[0008] The sealing structure comprises a No. 1 ring groove arranged on the outer ring surface of the inner tube, a No. 1 abutting ring is arranged in the No. 1 ring groove, the No. 1 abutting ring and the inner tube are connected by a plurality of No. 1 bolts, the outer side surface of the end cover is connected with a No. 2 abutting ring by a plurality of No. 2 bolts, a No. 3 abutting ring is abutted at the gap between the outer tube and the end cover, the No. 3 abutting ring is clamped between the No. 1 abutting ring and the No. 2 abutting ring, the side surface of the No. 1 abutting ring in contact with the No. 3 abutting ring is an inclined surface, the No. 1 abutting ring, the No. 2 abutting ring and the No. 3 abutting ring are replaceable, a No. 1 sealing ring is clamped between the No. 1 abutting ring and the inner tube, and a No. 2 sealing ring is clamped between the No. 3 abutting ring and the end cover;

[0009] The No. 1 abutment ring, the No. 2 abutment ring, the No. 3 abutment ring, the No. 1 sealing ring and the No. 2 sealing ring are replaceable.

[0010] Preferably, the No. 1 sealing ring and the No. 2 sealing ring are either rubber sealing rings or ceramic sealing rings.

[0011] Preferably, the side surface of the No. 1 abutting ring in contact with the No. 3 abutting ring is an inclined surface, the inclined surface is plated with a coating, and the No. 3 abutting ring is embedded with a No. 3 sealing ring abutting against the inner inclined surface of the No. 1 abutting ring.

[0012] Preferably, the coating is a nickel-phosphorus-boron alloy plating.

[0013] Preferably, the connecting component includes a fixing frame fixed on the valve body, the end cover located on the upper side is fixedly connected to the fixing frame, a catheter is fixedly clamped in the fixing frame, the upper end of the catheter extends into the flow channel, and the catheter extends downward to the through hole in the end cover, and a sealing sleeve is provided in the through hole in the end cover on the upper side.

[0014] Preferably, the fixing assembly includes a fixing tube arranged in the inner tube, the fixing tube and the inner tube are connected by a No. 3 bolt, and an extension tube that can be fixed in the fixing tube is arranged in the through hole in the end cover.

[0015] The sole of the shoe is provided with a closure device on the valve body, and the closure device includes two covers and a No. 1 tie, and the covers are respectively located on the left and right sides of the valve body and close the flow channel, and the cover on the right side is provided with a No. 1 tie opening that passes through the left and right sides, and the No. 1 tie is fixed to the cover on the left side, and the No. 1 tie passes through the flow channel and then passes through the tie opening, the No. 1 tie in the flow channel is in a tightened state, and the tie opening is sealed with glue.

[0016] Preferably, the left side surface of the left cover is also connected to a cutting knife via a plurality of No. 1 springs, the cutting knife is annular, and the axis of the cutting knife is colinear with the No. 1 cable tie located in the flow channel.

[0017] Preferably, the end cover located at the lower side is closed by a negative pressure cover, and the negative pressure cover is provided with a manual pump and an air pressure display.

[0018] Preferably, the manual pump comprises a No. 1 sleeve arranged on the negative pressure cover, a No. 1 piston cavity penetrating from top to bottom is arranged in the No. 1 sleeve, and a No. 1 piston is slidably connected in the No. 1 piston cavity, a No. 2 tie is arranged at one end of the No. 1 piston, and the opening of the No. 1 sleeve is narrowed to form a No. 2 tie opening;

[0019] The present invention provides a multi-seal structure ball valve, which has the following beneficial effects:

[0020] The present invention can form different sealing structures by changing the parts in the sealing structure, including a high temperature resistant type, a normal temperature shear resistant type, and a normal temperature soft sealing type. When the present invention is produced and assembled, suitable parts can be selected according to customer needs and usage scenarios, thereby increasing the scope of application of the present invention.

[0021] The present invention is provided with a sealer for sealing the two openings of the valve body. The staff only needs to pump air into the end cover to prevent leakage, which reduces the quality inspection process. The sealer is disposable and cannot be restored after opening, which increases the difficulty of counterfeiting and refurbishment of the present invention.

[0022] In addition to the closure device, the present invention is provided with a negative pressure cover for closing the last opening, and the negative pressure cover is provided with a disposable pump. When the present invention needs to be stored, the staff can use the pump to generate negative pressure in the valve body and the material guide pipe. The air pressure condition in the material guide pipe can be intuitively displayed through the air pressure display located on the negative pressure cover, so as to observe whether defective products are produced due to aging of parts during the storage process during packing and shipment, thereby improving the overall quality of the product. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 It is a schematic diagram of the structure of the present invention;

[0024] Figure 2 yes Figure 1 A schematic diagram of the structure of an embodiment of the invention;

[0025] Figure 3 yes Figure 1 A schematic diagram of the structure of another embodiment;

[0026] Figure 4 yes Figure 1 A schematic diagram of the structure of another embodiment of the invention;

[0027] Figure 5 yes Figure 1 The structural diagram of the middle closure;

[0028] Figure 6 yes Figure 1 Schematic diagram of the structure of the medium negative pressure cover;

[0029] Figure 7 yes Figure 1 Enlarged diagram of the middle bracket.

[0030] In the figure:

[0031] 11. Valve body; 12. Flow channel; 13. Material guide tube; 14. Fixed frame; 15. Conduit; 16. Fixed tube; 17. Extension tube; 18. Closing device; 21. Negative pressure cover; 22. Manual pump; 23. Air pressure display; 24. No. 1 sleeve; 25. No. 1 piston; 26. No. 2 cable tie; 27. No. 2 sleeve; 28. No. 2 piston; 31. Inner tube; 32. Outer tube; 33. End cover; 41. Sealing cover; 42. No. 1 cable tie; 43. Cutting knife; 51. No. 1 ring groove; 61. No. 1 abutting ring; 62. No. 2 abutting ring; 63. No. 3 abutting ring; 71. No. 1 sealing ring; 72. No. 2 sealing ring; 73. No. 3 sealing ring; 100. Connecting assembly; 101. Fixing assembly; 102. Sealing structure. DETAILED DESCRIPTION

[0032] Embodiments of the present invention are described in detail below, and examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and intended to be used to explain the present invention, but should not be understood as limiting the present invention.

[0033] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside" and the like indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the referred device or element must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0034] In addition, the terms "first" and "second" are used for descriptive purposes only and should not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In the description of the present invention, the meaning of "plurality" is at least two, such as two, three, etc., unless otherwise clearly and specifically defined.

[0035] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral one; it can be a mechanical connection, an electrical connection, or communication with each other; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements, unless otherwise clearly defined. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0036] Reference Figure 1-Figure 7 According to an embodiment of a ball valve with a multi-seal structure of the present invention, the valve body 11 is provided with a flow channel 12, and the flow channel 12 is provided with a valve ball for controlling the flow direction of the fluid in the flow channel 12, and the valve ball is connected to a valve stem extending outside the valve body 11;

[0037] The material guide tube 13 can be connected to the flow channel 12 through a connecting component 100. The material guide tube 13 includes an inner tube 31, an outer tube 32 and two end covers 33. The two end covers 33 are arranged in opposite directions and are respectively located at the two ends of the outer tube 32. The inner tube 31 is located inside the outer tube 32. The two end covers 33 are respectively connected to the upper and lower ends of the inner tube 31 through a set of fixing components 101. The upper and lower ends of the inner tube 31 are also respectively sealed with a set of sealing structures 102 to maintain a seal between the upper and lower end covers 33.

[0038] The sealing structure 102 includes a No. 1 ring groove 51 provided on the outer ring surface of the inner tube 31, a No. 1 abutment ring 61 is provided in the No. 1 ring groove 51, the No. 1 abutment ring 61 and the inner tube 31 are connected by a plurality of No. 1 bolts, the outer side surface of the end cover 33 is connected to a No. 2 abutment ring 62 by a plurality of No. 2 bolts, and a No. 3 abutment ring 63 is provided in abutment at the gap between the outer tube 32 and the end cover 33. The abutment ring 63 is also clamped between the No. 1 abutment ring 61 and the No. 2 abutment ring 62. The inclined surface inside the No. 1 abutment ring 61 contacts the No. 3 abutment ring 63. The No. 1 abutment ring 61, the No. 2 abutment ring 62 and the No. 3 abutment ring 63 are replaceable. A No. 1 sealing ring 71 is clamped between the No. 1 abutment ring 61 and the inner tube 31. A No. 2 sealing ring 72 is clamped between the No. 3 abutment ring 63 and the end cover 33.

[0039] There are several embodiments of the sealing structure 102:

[0040] Example 1: Figure 2As shown, the No. 1 sealing ring 71 and the No. 2 sealing ring 72 are ceramic sealing rings, specifically, ceramic fiber high-temperature sealing rings, and the No. 3 abutting ring 63 can be squeezed into the No. 1 abutting ring 61 to complete the seal, or the No. 3 abutting ring 63 is connected to the No. 1 abutting ring 61 by welding to form a seal. The seal achieved in this embodiment can withstand a high temperature of 540°;

[0041] Example 2: Figure 4 As shown, a No. 3 sealing ring 73 is clamped inside the lower side of the No. 3 abutting ring 63, and the No. 1 sealing ring 71, the No. 2 sealing ring 72 and the No. 3 sealing ring 73 are all rubber sealing rings. The inclined surface where the No. 1 abutting ring 61 and the No. 3 sealing ring 73 abut is plated with a coating. Specifically, the coating can be an ENP (chemical nickel-phosphorus-boron alloy coating) with a δ=0.05. The sealing conditions of this embodiment are simple and can be completed under normal temperature without spray welding, and the construction difficulty is low.

[0042] Example 3: Figure 3 As shown, the No. 1 sealing ring 71 and the No. 2 sealing ring 72 are rubber sealing rings, and the No. 3 abutment ring 63 can be squeezed into the No. 1 abutment ring 61 to complete the seal, or the No. 3 abutment ring 63 can be connected to the No. 1 abutment ring 61 by welding to form a seal. If welding is used, the connection strength and shear strength will be increased.

[0043] The connecting component 100 includes a fixing frame 14 fixed on the valve body 11, the end cover 33 located on the upper side is fixedly connected to the fixing frame 14, a conduit 15 is fixedly clamped in the fixing frame 14, the upper end of the conduit 15 extends into the flow channel 12, and the conduit 15 extends downward to the through hole in the end cover 33 located on the upper side, and a sealing sleeve 34 abutting against the outer side of the conduit 15 is provided in the through hole in the end cover 33 on the upper side to prevent the fluid gushing out of the end cover 34 from flowing out through the gap between the conduit 15 and the end cover 34.

[0044] The fixing assembly 101 includes a fixing tube 16 disposed in the inner tube 31, and the fixing tube 16 is connected to the inner tube 31 by a No. 3 bolt. An extension tube 17 fixed in the fixing tube 16 is disposed in the through hole in the end cover 33, and the extension tube 17 can be directly pressed into the fixing tube 16 for sealing, and can also be threadedly connected to the fixing tube 16.

[0045] like Figure 5As shown, in order to facilitate the staff to carry out air tightness detection, in a second embodiment of a ball valve with a multi-seal structure, and the difference from the above embodiment is that: a closure 18 is provided on the valve body 11, and the closure 18 includes two sealing covers 41 and a No. 1 tie 42, and the sealing covers 41 are respectively located on the left and right sides of the valve body 11 and close the flow channel 12, and a No. 1 tie opening that passes through the left and right is provided in the sealing cover 41 on the right side, and the No. 1 tie opening 42 is fixed to the sealing cover 41 on the left side, and the No. 1 tie opening 42 passes through the flow channel 12 and then passes through the No. 1 tie opening, and the No. 1 tie opening 42 in the flow channel 12 is in a taut state, and the No. 1 tie opening is sealed with glue. At this time, the valve body 11 is closed, and when the staff needs to conduct quality inspection to check the air tightness, the valve body 11 and the guide pipe 33 need to be placed in water, and gas is injected through the end cover 33 located on the lower side. If no bubbles are generated at this time, the air tightness is qualified.

[0046] In this embodiment, the left side of the cover 41 on the left is also connected to a cutting knife 43 through several No. 1 springs. The cutting knife 43 is annular, and the axis of the cutting knife 43 is in line with the No. 1 cable tie 42 located in the flow channel 12. When the customer receives the goods for use, the cover 41 needs to be opened. At this time, the user can press the cutting knife 43 and push it to the right. At this time, the cutting knife 43 can cut the cover 41 on the left. After the cutting is completed, the No. 1 cable tie 42 no longer tightens the two covers 41, that is, the user can open the cover 41. Figure 5 As shown, the outer ring of the sealing cover 41 is a rubber sleeve.

[0047] like Figure 6 As shown, the end cover 33 located on the lower side is closed by the negative pressure cover 21, and the negative pressure cover 21 is provided with a manual pump 22 and an air pressure display 23. When the goods are to be stored, the manual pump 22 can form a low pressure in the pump body 11, which is displayed by the air pressure display 23. Before the goods are loaded for transportation, the staff only needs to observe the air pressure display 23 to determine whether the air tightness of the product is destroyed during the storage process, so as to avoid the shipment of defective products.

[0048] In order to reduce the cost and operation difficulty, the manual pump 22 includes a No. 1 sleeve 24 arranged on the negative pressure cover 21, and a No. 1 piston cavity is arranged in the No. 1 sleeve 24, and a No. 1 piston 25 is slidably connected in the No. 1 piston cavity, and a No. 2 tie 26 is arranged at one end of the No. 1 piston 25, and the opening of the No. 1 sleeve 24 is narrowed to form a No. 2 tie opening;

[0049] The air pressure display 23 includes a No. 2 sleeve 27 disposed on the negative pressure cover 21, wherein the No. 2 sleeve 27 is provided with a No. 2 piston cavity which passes through from top to bottom, wherein a No. 2 piston 28 is slidably connected in the No. 2 piston cavity, and the No. 2 piston 28 is connected to the side of the No. 2 piston cavity through a No. 2 spring, and the No. 2 sleeve 27 is made of a transparent material;

[0050] When both ends of the valve body 11 are closed by the sealing cover 41, when the staff pulls the No. 2 tie 26 downward, the No. 1 piston 25 will move downward. At this time, the No. 2 tie can limit the No. 2 tie 26 from resetting upward, that is, at this time, there is negative pressure in the guide pipe 13 and the valve body 11, and the No. 2 piston 28 will move upward under the action of the negative pressure. The staff can determine whether there is an air leakage in the guide pipe 13 after storage by observing the position of the No. 2 piston 28. If there is an air leakage, the No. 2 piston 28 will rebound to the lowermost side under the action of the No. 2 spring.

[0051] The above description is only a specific embodiment of the present invention, but the technical features of the present invention are not limited thereto. Any changes or modifications made by any technician in the field of the present invention are included in the patent scope of the present invention.

Claims

1. A ball valve with a multi-seal structure, comprising a valve body (11), a flow channel (12) being provided in the valve body (11), a valve ball for controlling the flow direction of a fluid in the flow channel (12) being provided in the flow channel (12), the valve ball being connected to a valve stem extending outside the valve body (11), characterized in that: It also comprises a material guide pipe (13) capable of being connected to the flow channel (12) through a connecting component (100), the material guide pipe (13) comprising an inner pipe (31), an outer pipe (32) and two end covers (33), the two end covers (33) being arranged in opposite directions and respectively located at two ends of the outer pipe (32), the inner pipe (31) being located inside the outer pipe (32), the two end covers (33) being respectively connected to the upper and lower ends of the inner pipe (31) through a set of fixing components (101), and the upper and lower ends of the inner pipe (31) being respectively connected to the upper and lower ends of the end covers (33) through a set of sealing structures (102) to maintain a seal between the upper and lower ends; The sealing structure (102) comprises a No. 1 annular groove (51) provided on the outer annular surface of the inner tube (31), a No. 1 abutment ring (61) being provided in the No. 1 annular groove (51), the No. 1 abutment ring (61) being connected to the inner tube (31) via a plurality of No. 1 bolts, the outer side surface of the end cover (33) being connected to a No. 2 abutment ring (62) via a plurality of No. 2 bolts, and a gap between the outer tube (32) and the end cover (33) being provided with a No. 2 abutment ring (62). A third abutment ring (63) is provided, the third abutment ring (63) is clamped between the first abutment ring (61) and the second abutment ring (62), the side surface of the first abutment ring (61) in contact with the third abutment ring (63) is an inclined surface, a first sealing ring (71) is clamped between the first abutment ring (61) and the inner tube (31), and a second sealing ring (72) is clamped between the third abutment ring (63) and the end cover (33); The No. 1 abutment ring (61), the No. 2 abutment ring (62), the No. 3 abutment ring (63), the No. 1 sealing ring (71), and the No. 2 sealing ring (72) are replaceable.

2. A multi-seal structure ball valve according to claim 1, characterized in that: The first sealing ring (71) and the second sealing ring (72) are either rubber sealing rings or ceramic sealing rings.

3. A multi-seal structure ball valve according to claim 1, characterized in that: The side surface of the No. 1 abutting ring (61) that contacts the No. 3 abutting ring (63) is an inclined surface, the inclined surface is plated with a coating, and the No. 3 abutting ring (63) is embedded with a No. 3 sealing ring (73) that abuts against the inner inclined surface of the No. 1 abutting ring (61).

4. A multi-seal structure ball valve according to claim 3, characterized in that: The coating is a nickel-phosphorus-boron alloy plating layer.

5. The multi-seal structure ball valve according to claim 1, characterized in that: The connecting assembly (100) comprises a fixing frame (14) fixed on the valve body (11), the end cover (33) located on the upper side being fixedly connected to the fixing frame (14), a conduit (15) being fixedly clamped inside the fixing frame (14), the upper end of the conduit extending into the flow channel (12), and the conduit (15) extending downwardly into a through hole in the end cover (33), and a sealing sleeve (34) being provided in the through hole in the upper end cover (33).

6. A multi-seal structure ball valve according to claim 1, characterized in that: The fixing assembly (101) comprises a fixing tube (16) disposed in the inner tube (31), the fixing tube (16) and the inner tube (31) being connected via a No. 3 bolt, and an extension tube (17) capable of being fixed in the fixing tube (16) is disposed in a through hole in the end cover (33).

7. The multi-seal structure ball valve according to claim 1, characterized in that: The valve body (11) is provided with a closure (18), the closure (18) comprising two covers (41) and a No. 1 tie (42), the covers (41) being respectively located on the left and right sides of the valve body (11) and closing the flow channel (12), the cover (41) on the right side being provided with a No. 1 tie opening which passes through the left and right sides, the No. 1 tie (42) being fixed to the cover (41) on the left side, and the No. 1 tie (42) passing through the flow channel (12) and then passing through the tie opening, the No. 1 tie (42) in the flow channel (12) being in a tightened state, and the tie opening being sealed with glue.

8. The multi-seal structure ball valve according to claim 7, characterized in that: The left side surface of the left cover (41) is also connected to a cutting knife (43) via a plurality of No. 1 springs. The cutting knife (43) is annular, and the axis of the cutting knife (43) is colinear with the No. 1 cable tie (42) located in the flow channel (12).

9. The multi-seal structure ball valve according to claim 1, characterized in that: The end cover (33) located at the lower side is closed by a negative pressure cover (21), and the negative pressure cover (21) is provided with a manual pump (22) and an air pressure display (23).

10. A ball valve with a multi-seal structure according to claim 9, characterized in that: The manual pump (22) comprises a No. 1 sleeve (24) arranged on the negative pressure cover (21), a No. 1 piston chamber extending vertically is arranged in the No. 1 sleeve (24), a No. 1 piston chamber (25) is slidably connected in the No. 1 piston chamber, a No. 2 tie (26) is arranged at one end of the No. 1 piston (25), and the opening of the No. 1 sleeve (24) is narrowed to form a No. 2 tie opening; The air pressure display (23) comprises a No. 2 sleeve (27) arranged on the negative pressure cover (21), wherein the No. 2 sleeve (27) is provided with a No. 2 piston chamber which passes through from top to bottom, wherein a No. 2 piston (28) is slidably connected to the No. 2 piston chamber, and the No. 2 piston (28) is connected to the side of the No. 2 piston chamber via a No. 2 spring, and the No. 2 sleeve (27) is made of a transparent material.

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