Dustproof double-isolation discharge floating ball valve

Abstract

The utility model relates to the technical field of ball valves, in particular to a dustproof double-isolation discharging floating ball valve which comprises a valve body a, a valve body b and a ball valve element. The valve body a is rotationally provided with a valve rod assembly, a mounting groove used for mounting the ball valve element is formed in the valve body a, and the valve rod assembly is connected with the ball valve element in a matched mode. The valve body b is connected with the valve body a in a matched mode, installation pipes are arranged in the valve body a and the valve body b, and valve seat mechanisms are arranged at the ends, close to the ball valve element, of the installation pipes and tightly pressed on the peripheral face of the ball valve element. A supporting part is arranged in the mounting groove of the valve body a, a sealing ring is arranged on the supporting part, and the sealing ring is pressed on the peripheral surface of the ball valve element. According to the ball valve, when the ball valve is closed, liquid extrudes the ball valve element, the ball valve element firstly extrudes the sealing ring, the ball valve element is prevented from extruding a valve seat mechanism on the valve body a for a long time, the sealing ring is movably connected with the supporting part and can be replaced, and the service life of the ball valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of ball valves, in particular to a dustproof double-isolation discharge floating ball valve. Background Art

[0002] As the name implies, the internal valve core of the ball valve is spherical, and a channel is set between the two sides of the center of the ball for gas and liquid to flow. The valve stem drives the ball to rotate inside the valve cover to achieve the delivery and cutoff of materials. The ball of the ball valve is floating. Under the action of the medium pressure, the ball can produce a certain displacement and press tightly on the sealing surface of the outlet to ensure the sealing of the outlet.

[0003] The Chinese patent with the authorization announcement number CN213332510U discloses a dustproof sealing ball valve, which belongs to the field of valves. It solves the problem of poor sealing effect of ball valves. The dustproof sealing ball valve includes a valve body, a valve cover, a valve seat, a ball, a valve stem, a handle and a sealing packing between the valve cover and the valve stem. A connecting piece with dustproof sealing function is arranged in the valve body. A limiting step 1 abutting against the valve seat is arranged at a position of the connecting piece close to one end of the ball valve. A buffer spring 1 for buffering the ball is arranged on the limiting step 1. A rubber plate for sealing the ball is arranged at a corresponding position on the valve seat. The valve seat, the connecting piece and the rubber plate surround each other to form a closed cavity. A buffer spring 2 for buffering the valve seat is arranged on the rubber plate. The utility model has the advantages of simple structure and good dustproof sealing effect.

[0004] However, the above technical solution has the following defects: the valve seats on both sides of the dustproof sealing ball valve have the same structure. When the valve is closed, one side of the ball valve is subjected to greater pressure, so that the valve seats on both sides are subjected to uniform pressure. After long-term use, the elastic force reduction effect of the buffer spring behind the valve seat on one side fails, which reduces the sealing performance of the ball valve. Utility Model Content

[0005] The utility model aims to solve the problems existing in the background technology and proposes a dustproof double-isolation discharge floating ball valve.

[0006] The technical solution of the utility model: a dustproof double isolation discharge floating ball valve, comprising a valve body a, a valve body b and a ball valve core;

[0007] The valve body a is rotatably provided with a valve stem assembly, and a mounting groove for mounting a ball valve core is provided in the valve body a, and the valve stem assembly is cooperatively connected with the ball valve core;

[0008] The valve body b is connected with the valve body a, and the valve bodies a and b are both provided with mounting pipes, and the ends of the mounting pipes close to the ball valve core are both provided with valve seat mechanisms, and the valve seat mechanisms are pressed tightly against the outer peripheral surface of the ball valve core;

[0009] A supporting part is arranged in the installation groove of the valve body a, a sealing ring is arranged on the supporting part, and the sealing ring is pressed tightly by the outer peripheral surface of the ball valve core.

[0010] Preferably, the valve seat mechanism comprises a mounting ring and a valve seat;

[0011] The mounting ring is slidably connected to the inner wall of the mounting tube, and a flange plate is provided at one end of the mounting ring close to the ball valve core, and the valve seat is connected to the flange plate;

[0012] A plurality of springs are arranged on the flange plate, and the springs are connected to the ends of the mounting pipes.

[0013] Preferably, a plurality of sealing rings a are provided on the outer circumference of the mounting ring, and the sealing rings a are pressed tightly against the inner circumference of the mounting tube.

[0014] Preferably, the valve stem assembly comprises a mounting cover and a valve stem;

[0015] A fixed pipe is provided on the valve body a, the valve stem is rotatably connected to the fixed pipe, and the ball valve core is cooperatively connected to the valve stem;

[0016] The installation cover passes through the valve stem and is connected with the upper end of the fixed pipe. A fixed ring is rotatably arranged on the valve stem. The installation cover and the fixed pipe press the fixed ring tightly. A handle is arranged on the upper end of the valve stem.

[0017] Preferably, a mounting block is provided at the lower end of the valve stem, a groove is provided on the ball valve core, and the mounting block is cooperatively connected with the groove.

[0018] Preferably, a plurality of sealing rings b are provided on the outer peripheral surface of the valve stem, and the fixing tube presses the plurality of sealing rings b.

[0019] Preferably, the support portion is provided with a plurality of mounting holes, the sealing ring is provided with a plurality of protrusions, both the protrusions and the sealing ring are elastic, and the plurality of protrusions are cooperatively connected with the mounting holes.

[0020] Preferably, it also includes a flange; the valve body a and the valve body b are connected via the flange.

[0021] Compared with the prior art, the above technical solution of the utility model has the following beneficial technical effects:

[0022] 1. In the utility model, when the ball valve is closed, the liquid squeezes the ball valve core, and the ball valve core first squeezes the sealing ring, which prevents the ball valve core from squeezing the valve seat mechanism on the valve body a for a long time. The sealing ring is movably connected to the supporting part, and the sealing ring can be replaced, thereby increasing the service life of the ball valve.

[0023] 2. In the utility model, the valve seat mechanisms on both sides press the outer peripheral surface of the ball valve core, and the springs are in a compressed state. When the pressure on one side of the ball valve core is larger, the valve seat mechanism on one side is further squeezed, and the valve seat mechanism on the other side is still pressed against the outer side of the ball valve core under the squeezing of the spring, thereby ensuring the sealing of the ball valve.

[0024] 3. In the utility model, a plurality of sealing rings b are arranged on the valve stem to prevent the liquid in the valve body a from leaking out from the fixed pipe. The fixed ring can fix the position of the valve stem. The mounting block at the lower end of the valve stem is connected with the ball valve core so that the ball valve can be disassembled for maintenance. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] Figure 1 It is a stereoscopic diagram of a dustproof double isolation discharge floating ball valve proposed by the utility model.

[0026] Figure 2 The utility model is a cross-sectional view of a dustproof double-isolation discharge floating ball valve.

[0027] Figure 3 This is a structural schematic diagram of a valve seat mechanism in an embodiment of the utility model.

[0028] Figure 4 This is a schematic diagram of the internal structure of a valve body in an embodiment of the utility model.

[0029] Figure numerals: 1. valve body a; 2. handle; 3. mounting cover; 4. valve stem; 5. flange; 6. valve body b; 7. sealing ring b; 8. fixing tube; 9. ball valve core; 10. mounting ring; 11. mounting tube; 12. valve seat; 13. spring; 14. mounting block; 15. fixing ring; 16. sealing ring; 17. mounting hole; 18. bump; 19. support part; 20. sealing ring a. DETAILED DESCRIPTION

[0030] Embodiment 1

[0031] like Figure 1-Figure 4 As shown, the dustproof double isolation discharge floating ball valve proposed by the utility model comprises a valve body a1, a flange 5, a valve body b6 and a ball valve core 9;

[0032] The valve body a1 is rotatably provided with a valve stem assembly, and a mounting groove for mounting a ball valve core 9 is provided in the valve body a1, and the valve stem assembly is matched and connected with the ball valve core 9;

[0033] The valve body b6 is connected with the valve body a1, and the valve body a1 and the valve body b6 are both provided with a mounting tube 11, and the end of the mounting tube 11 close to the ball valve core 9 is provided with a valve seat mechanism, and the valve seat mechanism is pressed tightly against the outer peripheral surface of the ball valve core 9;

[0034] A support portion 19 is provided in the mounting groove of the valve body a1 , a sealing ring 16 is provided on the support portion 19 , and the sealing ring 16 is pressed against the outer peripheral surface of the ball valve core 9 .

[0035] Furthermore, a plurality of mounting holes 17 are provided on the support portion 19 , a plurality of protrusions 18 are provided on the sealing ring 16 , the protrusions 18 and the sealing ring 16 are both elastic, and the plurality of protrusions 18 are matched and connected with the mounting holes 17 .

[0036] Furthermore, the valve body a1 and the valve body b6 are connected via a flange 5 .

[0037] In the utility model, the ball valve core 9 is firstly put into the installation groove of the valve body a1, the ball valve core 9 is pressed tightly in the valve seat mechanism in the valve body a1, the valve stem mechanism is installed on the valve body a1 and matched with the ball valve core 9, and then the valve body b6 is installed on the valve body a1, the valve seat mechanism on the valve body b6 is pressed tightly on the outer side of the ball valve core 9, so that the ball valve core 9 is fixed in the installation groove, a support portion 19 is provided in the valve body a1, a sealing ring 16 is provided on the support portion 19, and the port of the valve body b6 is a liquid inlet port; in the utility model, when the ball valve is closed, the liquid squeezes the ball valve core 9, and the ball valve core 9 first squeezes the sealing ring 16 to prevent the ball valve core 9 from squeezing the valve seat mechanism on the valve body a1 for a long time, the sealing ring 16 is movably connected to the support portion 19, and the sealing ring 16 can be replaced to increase the service life of the ball valve.

[0038] Embodiment 2

[0039] like Figure 2-Figure 4 As shown, the dustproof double isolation discharge floating ball valve proposed by the present invention, compared with the first embodiment, the valve seat mechanism in this embodiment includes a mounting ring 10 and a valve seat 12;

[0040] The mounting ring 10 is slidably connected to the inner wall of the mounting tube 11, and a flange plate is provided at one end of the mounting ring 10 close to the ball valve core 9, and the valve seat 12 is connected to the flange plate;

[0041] A plurality of springs 13 are provided on the flange plate, and the springs 13 are connected to the ends of the mounting tubes 11 .

[0042] Furthermore, a plurality of sealing rings a20 are provided on the outer circumference of the mounting ring 10 , and the inner circumference of the mounting tube 11 presses the sealing rings a20 .

[0043] In this embodiment, the valve seat mechanisms on both sides press the outer peripheral surface of the ball valve core 9, and the springs 13 are in a compressed state. When the pressure on one side of the ball valve core 9 is larger, the valve seat mechanism on one side is further squeezed, and the valve seat mechanism on the other side is still pressed against the outside of the ball valve core 9 under the squeezing of the spring 13.

[0044] Embodiment 3

[0045] like Figure 2-Figure 3 As shown, the dustproof double isolation discharge floating ball valve proposed by the utility model, compared with the first embodiment, the valve stem assembly in this embodiment includes a mounting cover 3 and a valve stem 4;

[0046] A fixed tube 8 is provided on the valve body a1, the valve stem 4 is rotatably connected to the fixed tube 8, and the ball valve core 9 is cooperatively connected to the valve stem 4;

[0047] The mounting cover 3 passes through the valve stem 4 and is connected to the upper end of the fixed tube 8 . A fixed ring 15 is rotatably provided on the valve stem 4 . The mounting cover 3 and the fixed tube 8 press the fixed ring 15 . A handle 2 is provided on the upper end of the valve stem 4 .

[0048] Furthermore, a mounting block 14 is provided at the lower end of the valve stem 4, a groove is provided on the ball valve core 9, and the mounting block 14 is cooperatively connected with the groove.

[0049] Furthermore, a plurality of sealing rings b7 are provided on the outer peripheral surface of the valve stem 4, and the fixing tube 8 presses the plurality of sealing rings b7.

[0050] In this embodiment, multiple sealing rings b7 are provided on the valve stem 4 to prevent the liquid in the valve body a1 from leaking out from the fixed tube 8. The fixed ring 15 can fix the position of the valve stem 4. The mounting block 14 at the lower end of the valve stem 4 is connected with the ball valve core 9 so that the ball valve can be disassembled for maintenance.

[0051] The implementation modes of the present invention are described in detail above in conjunction with the accompanying drawings, but the present invention is not limited thereto, and various changes can be made within the knowledge scope of technicians in the relevant technical field without departing from the purpose of the present invention.

Claims

1. A dustproof double isolation discharge floating ball valve, characterized in that: It comprises a valve body a (1), a valve body b (6) and a ball valve core (9); The valve body a (1) is rotatably provided with a valve stem assembly, and a mounting groove for mounting a ball valve core (9) is provided in the valve body a (1), and the valve stem assembly is cooperatively connected with the ball valve core (9); The valve body b (6) is connected with the valve body a (1) in cooperation, and a mounting tube (11) is provided in both the valve body a (1) and the valve body b (6). A valve seat mechanism is provided at one end of the mounting tube (11) close to the ball valve core (9), and the valve seat mechanism is pressed against the outer peripheral surface of the ball valve core (9); A support portion (19) is provided in the installation groove of the valve body a (1), a sealing ring (16) is provided on the support portion (19), and the sealing ring (16) is pressed against the outer peripheral surface of the ball valve core (9).

2. A dustproof double isolation discharge floating ball valve according to claim 1, characterized in that: The valve seat mechanism comprises a mounting ring (10) and a valve seat (12); The mounting ring (10) is slidably connected to the inner wall of the mounting tube (11); a flange plate is provided at one end of the mounting ring (10) close to the ball valve core (9); and the valve seat (12) is connected to the flange plate; A plurality of springs (13) are arranged on the flange plate, and the springs (13) are connected to the ends of the mounting pipes (11).

3. A dustproof double isolation discharge floating ball valve according to claim 2, characterized in that: The outer circumference of the mounting ring (10) is provided with a plurality of sealing rings a (20), and the inner circumference of the mounting tube (11) presses the sealing rings a (20).

4. The dustproof double isolation discharge floating ball valve according to claim 1 is characterized in that: The valve stem assembly comprises a mounting cover (3) and a valve stem (4); A fixed tube (8) is provided on the valve body a (1), the valve stem (4) is rotatably connected to the fixed tube (8), and the ball valve core (9) is cooperatively connected to the valve stem (4); The mounting cover (3) passes through the valve stem (4) and is connected to the upper end of the fixed tube (8); a fixed ring (15) is rotatably provided on the valve stem (4); the mounting cover (3) and the fixed tube (8) press the fixed ring (15); and a handle (2) is provided on the upper end of the valve stem (4).

5. A dustproof double isolation discharge floating ball valve according to claim 4, characterized in that: A mounting block (14) is provided at the lower end of the valve stem (4), a groove is provided on the ball valve core (9), and the mounting block (14) is connected in cooperation with the groove.

6. The dustproof double isolation discharge floating ball valve according to claim 4 is characterized in that: A plurality of sealing rings b (7) are arranged on the outer peripheral surface of the valve stem (4), and the fixing tube (8) presses the plurality of sealing rings b (7).

7. The dustproof double isolation discharge floating ball valve according to claim 1 is characterized in that: The support portion (19) is provided with a plurality of mounting holes (17), the sealing ring (16) is provided with a plurality of protrusions (18), the protrusions (18) and the sealing ring (16) are both elastic, and the plurality of protrusions (18) are matched and connected with the mounting holes (17).

8. The dustproof double isolation discharge floating ball valve according to claim 1, characterized in that: It also includes a flange (5); the valve body a (1) and the valve body b (6) are connected via the flange (5).

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