One-piece type floating ball valve

Abstract

The utility model relates to the technical field of ball valves, in particular to a one-piece type floating ball valve which comprises a valve body and a valve cover assembly, a valve cavity, an inflow channel and an outflow channel are arranged in the valve body, the inflow channel and the outflow channel are respectively communicated with the valve cavity, a valve seat is arranged in the valve cavity, and a check block and a pressing block are arranged on the inner side of a valve cover. The right side of the pressing block is arranged on the valve seat in a pressing mode, it is guaranteed that the valve seat is installed and fixed, the first lip-shaped sealing ring and the second lip-shaped sealing ring are separated through the check block, the first lip-shaped sealing ring and the second lip-shaped sealing ring do not affect each other, and the sealing effect of the first lip-shaped sealing ring and the sealing effect of the second lip-shaped sealing ring are guaranteed. The first lip-shaped sealing ring and the second lip-shaped sealing ring form a lip-shaped sealing ring structure between the valve cover assembly and the valve body, so that the lip-shaped sealing ring structure is adopted in the small-caliber one-piece type floating ball valve; and the first lip-shaped sealing ring and the second lip-shaped sealing ring form a double-sealing structure, so that the sealing effect of the ball valve is improved.

Description

TECHNICAL FIELD

[0001] The utility model relates to ball valve technical field especially relates to a one-piece floating ball valve. BACKGROUND

[0002] One-piece floating ball valve is a kind of valve widely used in petroleum chemical industry, urban water supply and drainage and other fields, with excellent cut-off and regulating function, it mainly adopts integrated structure, and is opened and closed by rotating 90 degrees. It is mainly used for medium cut-off, distribution and flow direction change in pipeline, and its main features are: small fluid resistance, the resistance coefficient of one-piece floating ball valve is equal to the pipe segment of the same length, which means that almost no additional pressure loss is generated when fluid passes through;Simple structure, due to compact design, this valve is small in size and light in weight, easy to install and maintain;Convenient operation, only 90 degrees rotation is needed from full opening to full closing, simple and rapid operation, suitable for remote control.

[0003] At present, a small-bore one-piece floating ball valve, its nominal size is DN15, nominal pressure CALSS600, two end flanges are DN15, the minimum size of inflow channel and outflow channel is 10mm, the one-piece floating ball valve includes valve body and valve cover, valve cavity, inflow channel and outflow channel are arranged in valve body, inflow channel and outflow channel are communicated with valve cavity respectively, valve seat is arranged in valve cavity, assembly hole is outwardly expanded on valve body corresponding to inflow channel or outflow channel position, assembly hole is stepped structure, from left to right, cross-sectional hole diameter size of assembly hole decreases in turn, valve cover is detachably arranged in assembly hole by thread connection, inflow channel or outflow channel is arranged in the middle of valve cover, valve cover is pressed on valve seat, O-shaped sealing ring sealing structure is adopted for sealing between valve cover and valve body. Due to the reason of conveying medium, lip-shaped sealing ring structure is required to be designed between valve cover and valve body, the space occupied by lip-shaped sealing ring structure is larger than that of O-shaped sealing ring sealing structure, and due to the limitation of flange size and minimum wall thickness of valve, the outer shape space of valve cannot be enlarged, directly sleeving lip-shaped sealing ring structure on valve cover will cause that valve cover cannot be completely pressed on valve seat, so lip-shaped sealing ring structure cannot be directly realized between valve cover and valve body, which affects the use of one-piece floating ball valve. UTILITY MODEL CONTENTS

[0004] The utility model solves the technical problem to provide a one-piece floating ball valve capable of realizing lip-shaped sealing ring structure.

[0005] The utility model discloses a technical scheme that solves its technical problem is adopted: One piece formula floating ball valve, including valve body and valve cover subassembly, be provided with valve cavity, inflow channel and outflow channel in the valve body, and the inflow channel, outflow channel are linked with valve cavity respectively, be provided with valve seat in the valve cavity, and the valve body is outwardly expanded with assembly hole in the position of inflow channel or outflow channel, and the assembly hole is the stepped structure, from left to right, and the cross section hole diameter size of assembly hole reduces gradually, and the valve cover subassembly is detachably arranged in the assembly hole through the threaded connection, and the inflow channel or outflow channel is arranged in the middle of valve cover subassembly, and the valve cover subassembly is valve cover, stopper and pressure block from left to right, and the right side of pressure block is pressed on the valve seat, and the left side of pressure block is provided with the first lip-shaped sealing ring between pressure block and assembly hole.

[0006] The valve cover is the stepped structure, from left to right, and the cross section hole diameter size of valve cover reduces gradually, and the right side of valve cover is provided with the second lip-shaped sealing ring between valve cover and assembly hole, and the stopper is matched and arranged between the first lip-shaped sealing ring and the second lip-shaped sealing ring.

[0007] Further, the pressure block is sequentially provided with a first sealing ring mounting portion, a connecting partition portion and a valve seat mounting portion from left to right, the outer wall surface of the connecting partition portion is abutted against the inner surface of the assembly hole, the cross section size of the valve seat mounting portion and the first sealing ring mounting portion is smaller than the cross section size of the connecting partition portion, the valve seat is arranged on the valve seat mounting portion, the left side wall of the valve seat mounting portion is abutted against the right side wall of the connecting partition portion, and the first lip-shaped sealing ring is matched and sleeved on the first sealing ring mounting portion.

[0008] Further, the left end portion of the first sealing ring mounting portion is provided with a first tapered guide structure.

[0009] Further, the middle of the assembly hole is provided with a connecting internal thread, the middle of the valve cover is provided with a connecting external thread, and the valve cover is detachably arranged in the assembly hole through the connecting internal thread and the connecting external thread.

[0010] The right side of the valve cover is a second sealing ring mounting portion, and the second lip-shaped sealing ring is matched and sleeved on the second sealing ring mounting portion.

[0011] Further, the right end portion of the second sealing ring mounting portion is provided with a second tapered guide structure.

[0012] Further, the left side of the valve cover is connected with an auxiliary mounting portion, and the left side end surface of the auxiliary mounting portion is provided with an auxiliary tool mounting groove.

[0013] Further, the left side end surface of the auxiliary mounting portion is provided with a helical line sealing water line.

[0014] Further, the outer wall surface of the stopper is abutbed against the inner surface of the assembly hole.

[0015] Furthermore, the stopper includes a main body, and limiting parts are respectively provided on both sides of the main body, one limiting part is matched and arranged between the right side of the valve cover and the assembly hole, and the other limiting part is matched and arranged between the left side of the pressure block and the assembly hole, and the outer wall surface of the main body is in contact with the inner surface of the assembly hole.

[0016] The beneficial effects of the utility model are as follows: the valve cover assembly consists of a valve cover, a stopper and a pressure block from left to right, the right side of the pressure block is pressed on the valve seat, and a first lip sealing ring is arranged between the left side of the pressure block and the assembly hole; the valve cover is a stepped structure, and the cross-sectional aperture size of the valve cover decreases from left to right, a second lip sealing ring is arranged between the right side of the valve cover and the assembly hole, and the stopper is matched and arranged between the first lip sealing ring and the second lip sealing ring. By arranging a stopper and a pressure block on the inner side of the valve cover, the right side of the pressure block is pressed on the valve seat, thereby ensuring the installation and fixation of the valve seat, and the stopper separates the first lip sealing ring and the second lip sealing ring. The first lip sealing ring and the second lip sealing ring do not affect each other, thereby ensuring the sealing effect of the first lip sealing ring and the second lip sealing ring. The first lip sealing ring and the second lip sealing ring constitute a lip sealing ring structure between the valve cover assembly and the valve body, thereby realizing the use of a lip sealing ring structure in a small-caliber one-piece floating ball valve; and the first lip sealing ring and the second lip sealing ring constitute a double sealing structure, thereby improving the sealing effect of the ball valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a structural diagram of the one-piece floating ball valve of the utility model;

[0018] Figure 2 It is a structural diagram of the valve cover and auxiliary installation part;

[0019] Figure 3 It is a structural diagram of the stopper;

[0020] Figure 4 It is a structural diagram of the briquette;

[0021] Marked as: valve body 1, inflow channel 11, outflow channel 12, valve cover 2, second sealing ring mounting part 21, second conical guide structure 22, stopper 3, main body 31, limiting part 32, pressure block 4, first sealing ring mounting part 41, connecting partition part 42, valve seat mounting part 43, first conical guide structure 44, valve seat 5, first lip sealing ring 6, second lip sealing ring 7, auxiliary mounting part 8, auxiliary tool mounting groove 81. DETAILED DESCRIPTION

[0022] The present invention will be further described below with reference to the accompanying drawings and specific embodiments.

[0023] The directions mentioned below are Figure 1 The position of each component in the diagram is used as the reference.

[0024] As Figure 1 , Figure 2 , Figure 3 And Figure 4 The utility model discloses a one-piece floating ball valve, including valve body 1 and valve cover assembly, be provided with valve cavity, inflow channel 11 and outflow channel 12 in valve body 1, inflow channel 11, outflow channel 12 are linked with valve cavity respectively, be provided with valve seat 5 in valve cavity, the outward expansion of the assembly hole that corresponds inflow channel 11 or outflow channel 12 position is set up on valve body 1, the assembly hole is the stepped structure, from left to right (from the outside to the inside), the cross section hole diameter size of assembly hole reduces gradually, valve cover assembly is detachably set in the assembly hole through the threaded connection, inflow channel 11 or outflow channel 12 is set in the middle of valve cover assembly, valve cover assembly is in order from left to right valve cover 2, stopper 3 and press block 4, the right side of press block 4 is pressed on valve seat 5, and the left side of press block 4 is provided with first lip seal ring 6 between assembly hole;

[0025] Valve cover 2 is the stepped structure, from left to right (from the outside to the inside), the cross section hole diameter size of valve cover 2 reduces gradually, and the right side of valve cover 2 is provided with second lip seal ring 7 between assembly hole, and stopper 3 is matched and set between first lip seal ring 6 and second lip seal ring 7.

[0026] In the embodiment, the assembly hole is set on the outside of the position corresponding to the outflow channel 12, the assembly hole is the stepped structure similar to the stepped shaft structure, the cross section hole diameter size of the assembly hole reduces gradually in sections from the outside to the inside. By setting stopper 3 and press block 4 on the inside of valve cover 2, the right side of press block 4 is pressed on valve seat 5, the installation of valve seat 5 is guaranteed, stopper 3 separates first lip seal ring 6 and second lip seal ring 7, first lip seal ring 6 and second lip seal ring 7 do not affect each other, the sealing effect of first lip seal ring 6 and second lip seal ring 7 is guaranteed, first lip seal ring 6 and second lip seal ring 7 constitute the lip seal ring structure between valve cover assembly and valve body 1, so that the lip seal ring structure is used in the small-diameter one-piece floating ball valve is realized;And first lip seal ring 6 and second lip seal ring 7 constitute double-sealing structure, improve the sealing effect of ball valve.

[0027] Specifically, the function of press block 4 is to provide the installation position of first lip seal ring 6 and valve seat 5, guarantee that first lip seal ring 6 and valve seat 5 can be installed, and the preferred structure of the utility model press block 4 is: Figure 1 , Figure 4As shown, the pressure block 4 comprises, from left to right, a first sealing ring mounting portion 41, a connecting partition portion 42, and a valve seat mounting portion 43. The outer wall surface of the connecting partition portion 42 abuts against the inner surface of the assembly hole. The cross-sectional dimensions of the valve seat mounting portion 43 and the first sealing ring mounting portion 41 are both smaller than those of the connecting partition portion 42. The valve seat 5 is disposed on the valve seat mounting portion 43, and the left side wall of the valve seat mounting portion 43 abuts against the right side wall of the connecting partition portion 42. The first lip sealing ring 6 is fitted onto the first sealing ring mounting portion 41. The first sealing ring mounting portion 41, the connecting partition portion 42, and the valve seat mounting portion 43 are all cylindrical and coaxially arranged. The center of the first sealing ring mounting portion 41, the connecting partition portion 42, and the valve seat mounting portion 43 forms a portion of the outflow channel 12.

[0028] In order to facilitate the installation of the first lip seal ring 6 on the first seal ring mounting portion 41, Figure 4 As shown, a first conical guide structure 44 is provided at the left end portion of the first sealing ring mounting portion 41 .

[0029] The fixed connection between the valve cover assembly and the valve body 1 is achieved through the valve cover 2. Specifically, a connecting internal thread is provided in the middle of the assembly hole, and a connecting external thread is provided in the middle of the valve cover 2. The valve cover 2 is detachably provided in the assembly hole through the connecting internal thread and the connecting external thread.

[0030] The valve cover 2 is coaxial with the stopper 3 and the pressure block 4. The middle of the valve cover 2 and the stopper 3 is a part of the outflow channel 12. Figure 2 As shown, the right side of the valve cover 2 is a second sealing ring mounting portion 21. The second sealing ring mounting portion 21 is cylindrical, and the second lip sealing ring 7 is matched and mounted on the second sealing ring mounting portion 21. To facilitate the mounting of the second lip sealing ring 7 on the second sealing ring mounting portion 21, a second conical guide structure 22 is provided at the right end of the second sealing ring mounting portion 21.

[0031] To facilitate installation of the valve cover 2 in the assembly hole, an auxiliary mounting portion 8 is connected to the left side of the valve cover 2. The left end surface of the auxiliary mounting portion 8 is provided with an auxiliary tool mounting groove 81. The auxiliary tool mounting groove 81 is preferably a straight groove. The installation tool acts on the straight groove to screw the valve cover 2 into the assembly hole. To ensure the sealing of the connection with the pipeline flange, the left end surface of the auxiliary mounting portion 8 is provided with a spiral sealing waterline.

[0032] The function of the stopper 3 is to separate the first lip seal ring 6 and the second lip seal ring 7 to ensure the sealing effect of the first lip seal ring 6 and the second lip seal ring 7. In order to improve the use effect of the stopper 3, the outer wall surface of the stopper 3 is in contact with the inner surface of the assembly hole. In order to reduce the deviation of the stopper 3 during use and further improve the use effect of the stopper 3, Figure 1 、 Figure 3 As shown, the stopper 3 includes a main body 31, and limiting parts 32 are respectively provided on both sides of the main body 31. One limiting part 32 is matched and arranged between the right side of the valve cover 2 and the assembly hole, and the other limiting part 32 is matched and arranged between the left side of the pressure block 4 and the assembly hole. The outer wall surface of the main body 31 is in contact with the inner surface of the assembly hole.

Claims

1. A one-piece floating ball valve, comprising a valve body (1) and a valve cover assembly, wherein the valve body (1) is provided with a valve cavity, an inflow channel (11) and an outflow channel (12), the inflow channel (11) and the outflow channel (12) being respectively connected to the valve cavity, a valve seat (5) being provided in the valve cavity, an assembly hole being expanded outwardly at a position corresponding to the inflow channel (11) or the outflow channel (12) on the valve body (1), the assembly hole being a stepped structure, wherein the cross-sectional aperture size of the assembly hole decreases from left to right, the valve cover assembly being detachably arranged in the assembly hole by means of a threaded connection, the inflow channel (11) or the outflow channel (12) being arranged in the middle of the valve cover assembly, and characterized in that: The valve cover assembly comprises, from left to right, a valve cover (2), a stopper (3) and a pressure block (4); the right side of the pressure block (4) is pressed onto the valve seat (5); and a first lip seal ring (6) is provided between the left side of the pressure block (4) and the assembly hole; The valve cover (2) is a stepped structure. From left to right, the cross-sectional aperture size of the valve cover (2) decreases successively. A second lip seal ring (7) is provided between the right side of the valve cover (2) and the assembly hole. The stopper (3) is matched and provided between the first lip seal ring (6) and the second lip seal ring (7).

2. The one-piece floating ball valve according to claim 1, characterized in that: The pressing block (4) comprises, from left to right, a first sealing ring mounting portion (41), a connecting partition portion (42) and a valve seat mounting portion (43). The outer wall surface of the connecting partition portion (42) is in contact with the inner surface of the assembly hole. The cross-sectional dimensions of the valve seat mounting portion (43) and the first sealing ring mounting portion (41) are both smaller than the cross-sectional dimensions of the connecting partition portion (42). The valve seat (5) is arranged on the valve seat mounting portion (43), and the left side wall of the valve seat mounting portion (43) is in contact with the right side wall of the connecting partition portion (42). The first lip sealing ring (6) is matched and fitted on the first sealing ring mounting portion (41).

3. The one-piece floating ball valve according to claim 2, characterized in that: A first conical guide structure (44) is provided at the left end portion of the first sealing ring mounting portion (41).

4. The one-piece floating ball valve according to claim 1, characterized in that: A connecting internal thread is provided in the middle of the assembly hole, and a connecting external thread is provided in the middle of the valve cover (2). The valve cover (2) is detachably arranged in the assembly hole through the connecting internal thread and the connecting external thread. The right side of the valve cover (2) is a second sealing ring mounting portion (21), and the second lip sealing ring (7) is matched and sleeved on the second sealing ring mounting portion (21).

5. The one-piece floating ball valve according to claim 4, characterized in that: A second conical guide structure (22) is provided at the right end portion of the second sealing ring mounting portion (21).

6. The one-piece floating ball valve according to claim 1, characterized in that: The left side of the valve cover (2) is connected to an auxiliary mounting portion (8), and the left end surface of the auxiliary mounting portion (8) is provided with an auxiliary tool mounting groove (81).

7. The one-piece floating ball valve according to claim 1, characterized in that: The left end surface of the auxiliary mounting portion (8) is provided with a spiral sealing waterline.

8. The one-piece floating ball valve according to any one of claims 1 to 7, characterized in that: The outer wall surface of the stopper (3) abuts against the inner surface of the assembly hole.

9. The one-piece floating ball valve according to claim 8, characterized in that: The stopper (3) includes a main body (31), and limiting portions (32) are respectively provided on both sides of the main body (31). One limiting portion (32) is matched and arranged between the right side of the valve cover (2) and the assembly hole, and the other limiting portion (32) is matched and arranged between the left side of the pressure block (4) and the assembly hole. The outer wall surface of the main body (31) is in contact with the inner surface of the assembly hole.

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