Leak-proof gas ball valve

Abstract

The utility model relates to the technical field of fuel gas ball valves, in particular to a leakproof fuel gas ball valve which comprises a valve body, a connecting seat and a valve rod, a handle is fixedly installed at the top end of the valve rod through a bolt, an installation groove is formed in the inner wall of the connecting seat and communicated with the top of the connecting seat, and the valve rod is fixedly installed on the valve body. And an annular sealing gasket sleeves the bottom of the inner wall of the mounting groove and is positioned on the outer wall of the valve rod. According to the anti-leakage gas ball valve, through cooperative use of the annular box body, the rectangular box body, an ejector rod, a mounting groove, an annular extrusion piece, a sealing sleeve, an annular sealing gasket, a sliding hole, a worm, an adjusting lead screw, a worm gear, a rotary knob, an annular movable plate and a fixing hole, the annular extrusion piece moves downwards, and the extrusion force on the sealing sleeve is increased; the sealing sleeve can still be tightly attached to the outer wall of the valve rod even if the sealing sleeve is abraded, the annular extrusion piece is continuously adjusted in the using process of the ball valve, the sealing effect of the sealing sleeve is enhanced, and the service life of the sealing sleeve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of gas ball valves, in particular to a leakage-proof gas ball valve. Background Art

[0002] During the installation of gas pipelines, ball valves are often used to adjust the flow of gas in the pipeline. Traditional ball valves generally include a valve body, a ball core and a valve stem arranged in the valve body. The inner end of the valve stem extends into the valve body and is connected to the ball core, and the outer end of the valve stem extends out of the valve body and is connected to the handle. The handle drives the valve stem to rotate to control the opening and closing of the ball valve. However, there is a gap at the penetration of the valve stem and the valve body. During the use of the gas ball valve, there will be a slight gas leak at the penetration, which poses a certain safety hazard.

[0003] The Chinese patent publication number is CN218582316U. It discloses a high-sealing anti-leakage gas ball valve, which includes a valve stem, a handle, a valve body, a ball and a sealing mechanism. The utility model sets a sealing mechanism at the top of the inner side of the valve body, and improves the sealing performance of the sealing sleeve contacting the valve stem by entering the inner side of the annular connecting groove through the silicone ring, and further improves the sealing performance of the sealing sleeve contacting the valve stem by entering the annular convex body into the annular sealing groove, so as to achieve a high sealing performance between the valve stem and the valve body, more effectively prevent the gas from leaking outward through the valve stem and the valve body, and improve the practicality of the ball valve.

[0004] With respect to the above-mentioned related technologies, the ball valve has some shortcomings. The sealing performance between the sealing sleeve and the valve stem is enhanced by the silicone ring and the annular protrusion. However, in actual use, the sealing sleeve will gradually fail with time and wear. Even if the design of the silicone ring and the annular protrusion can extend the life of the sealing sleeve, when the sealing sleeve is worn to a certain extent, it will still cause gas leakage, limiting the service life of the ball valve. Therefore, it is necessary to provide a leak-proof gas ball valve to solve the above technical problems. Utility Model Content

[0005] The utility model aims to provide a leakage-proof gas ball valve to solve the problems raised in the above-mentioned background technology.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A leak-proof gas ball valve, comprising:

[0008] A valve body, a connecting seat and a valve stem, a handle is fixedly installed on the top of the valve stem by bolts, a mounting groove is opened on the inner wall of the connecting seat, and the mounting groove is communicated with the top of the connecting seat, the bottom of the inner wall of the mounting groove is located on the outer wall of the valve stem and is sleeved with an annular sealing gasket, a sealing sleeve is arranged on the top of the annular sealing gasket inside the mounting groove, and the sealing sleeve is sleeved on the outer wall of the valve stem, an annular connector is arranged at the top opening of the mounting groove, and the annular connector is sleeved on the outer wall of the valve stem;

[0009] An annular box body is fixedly installed on the top of the annular connecting member, and the annular box body is sleeved on the outer wall of the valve stem. An annular movable plate is slidably installed inside the annular box body. Both sides of the bottom of the annular box body are provided with fixing holes. The bottom of the annular connecting member is provided with sliding holes corresponding to the positions and numbers of the fixing holes. Both sides of the bottom of the annular movable plate are fixedly installed with push rods, and the push rods pass through the fixing holes and the sliding holes and extend to the inside of the mounting groove.

[0010] An annular extrusion piece is fixedly installed on the bottom end of the push rod, and the annular extrusion piece is sleeved on the outer wall of the valve stem, the bottom of the annular extrusion piece is in conflict with the top of the sealing sleeve, a rectangular box body is fixedly installed on the rear side of the top of the annular box body, and an adjustment mechanism is arranged inside the rectangular box body.

[0011] Preferably, an outer wall of the annular connector is provided with an outer thread, an inner wall of the top opening of the mounting groove is provided with an inner thread, and the annular connector is threadedly connected to the top opening of the mounting groove.

[0012] Preferably, the adjusting mechanism includes a worm, and the worm is rotatably installed inside the rectangular box. Adjustment screws are rotatably installed on both sides of the inside of the rectangular box, and the bottom end of the adjustment screw passes through the top of the annular box and extends to the inside of the annular box and is rotatably connected to the bearing installed on the bottom of the inside of the annular box. Worm wheels are fixedly installed on the outer walls of the top ends of the two adjusting screws, and the worm wheels are meshed with the adjusting screws. One end of the worm passes through one side of the inner wall of the rectangular box and extends to one side outside the rectangular box, and a knob is fixedly installed on one end of the worm.

[0013] Preferably, a threaded hole matched with the adjusting screw rod is provided on the top of the annular movable plate, and the annular movable plate is threadedly connected to the adjusting screw rod through the threaded hole provided on the top of the annular movable plate.

[0014] Preferably, the inner diameter of the annular extrusion piece gradually decreases from bottom to top, and the top of the sealing sleeve is inclined.

[0015] Preferably, the knob is made of aluminum alloy.

[0016] Preferably, a plurality of anti-slip grooves are provided on the outer wall of the knob.

[0017] Preferably, a sealing gasket is provided on the outer side of the bottom of the annular box body.

[0018] Compared with the prior art, the beneficial effects of the utility model are:

[0019] 1. The utility model uses an annular box, a rectangular box, a push rod, a mounting groove, an annular extrusion, a sealing sleeve, an annular sealing gasket, a sliding hole, a worm, an adjusting screw, a worm wheel, a knob, an annular movable plate and a fixing hole to move the annular extrusion downward, increase the extrusion force on the sealing sleeve, so that the sealing sleeve can still maintain a close fit with the outer wall of the valve stem even in the case of wear. During the use of the ball valve, the annular extrusion is continuously adjusted to enhance the sealing effect of the sealing sleeve, extend its service life, and avoid the need for frequent replacement of the sealing sleeve. In addition, by setting an annular sealing gasket, a double sealing effect can be achieved, further improving the sealing between the valve stem and the connecting seat, and effectively preventing gas leakage.

[0020] 2. The utility model uses a handle and an annular connector in coordination, so that when the sealing sleeve reaches the maximum degree of wear and the annular extrusion member reaches the maximum adjustment position during use of the ball valve, the sealing sleeve can be quickly replaced through the detachability of the handle and the annular connector, which is convenient for maintenance and repair work, and has high practicality. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of the utility model.

[0022] Figure 2 It is a schematic diagram of the connection structure between the connecting seat and the valve stem in the utility model.

[0023] Figure 3 It is a schematic diagram of the connection structure between the annular box body and the annular connecting piece in the utility model.

[0024] Figure 4 It is a schematic structural diagram of the annular extrusion member in the utility model.

[0025] Figure 5 For the utility model Figure 2 Enlarged structural diagram at A in the middle.

[0026] In the figure: 1. valve body; 2. connecting seat; 3. valve stem; 4. handle; 5. annular box body; 6. rectangular box body; 7. push rod; 8. mounting groove; 9. annular extrusion piece; 10. sealing sleeve; 11. annular sealing gasket; 12. annular connecting piece; 13. sliding hole; 14. worm; 15. adjusting screw; 16. worm wheel; 17. knob; 18. annular movable plate; 19. fixing hole. DETAILED DESCRIPTION

[0027] In order to make the technical means, creative features, objectives and effects achieved by the present invention easy to understand, the present invention is further described below in conjunction with specific implementation methods.

[0028] In the description of the present invention, it should be noted that the terms "upper", "lower", "inner", "outer", "front end", "rear end", "two ends", "one end", "the other end" and the like indicate positions or positional relationships based on the positions or positional relationships shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operate in a specific orientation, and therefore cannot be understood as a limitation on the present invention. In addition, the terms "first" and "second" are used for descriptive purposes only and cannot be understood as indicating or implying relative importance.

[0029] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installed", "provided with", "connected", etc. should be understood in a broad sense. For example, "connected" can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be an indirect connection through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0030] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0031] See also Figure 1-5 , an embodiment provided by the utility model:

[0032] A leak-proof gas ball valve, comprising:

[0033] A valve body 1, a connecting seat 2 and a valve stem 3, a handle 4 is fixedly installed on the top of the valve stem 3 by bolts, a mounting groove 8 is opened on the inner wall of the connecting seat 2, and the mounting groove 8 is communicated with the top of the connecting seat 2, the bottom of the inner wall of the mounting groove 8 is located on the outer wall of the valve stem 3 and is sleeved with an annular sealing gasket 11, a sealing sleeve 10 is arranged inside the mounting groove 8 and is located on the top of the annular sealing gasket 11, and the sealing sleeve 10 is sleeved on the outer wall of the valve stem 3, an annular connector 12 is arranged at the top opening of the mounting groove 8, and the annular connector 12 is sleeved on the outer wall of the valve stem 3;

[0034] An annular box body 5 is fixedly installed on the top of the annular connecting member 12, and the annular box body 5 is sleeved on the outer wall of the valve stem 3. An annular movable plate 18 is slidably installed inside the annular box body 5. Both sides of the bottom of the annular box body 5 are provided with fixing holes 19. The bottom of the annular connecting member 12 is provided with sliding holes 13 corresponding to the position and number of the fixing holes 19. Both sides of the bottom of the annular movable plate 18 are fixedly installed with push rods 7, and the push rods 7 pass through the fixing holes 19 and the sliding holes 13 and extend to the inside of the mounting groove 8.

[0035] An annular extrusion piece 9 is fixedly installed on the bottom end of the push rod 7, and the annular extrusion piece 9 is sleeved on the outer wall of the valve stem 3. The bottom of the annular extrusion piece 9 is in conflict with the top of the sealing sleeve 10. A rectangular box body 6 is fixedly installed on the rear side of the top of the annular box body 5, and an adjustment mechanism is arranged inside the rectangular box body 6.

[0036] An external thread is arranged on the outer wall of the annular connecting member 12 , an internal thread is arranged on the inner wall of the top opening of the installation groove 8 , and the annular connecting member 12 is threadedly connected to the top opening of the installation groove 8 .

[0037] In one of the embodiments, the adjusting mechanism includes a worm 14, and the worm 14 is rotatably installed inside the rectangular box 6, and adjusting screws 15 are rotatably installed on both sides of the inside of the rectangular box 6, and the bottom end of the adjusting screw 15 passes through the top of the annular box 5 and extends to the inside of the annular box 5 and is rotatably connected to the bearing installed on the bottom of the inside of the annular box 5, and worm wheels 16 are fixedly installed on the outer walls of the top ends of the two adjusting screws 15, and the worm wheels 16 are meshed with the adjusting screw 15, one end of the worm 14 passes through one side of the inner wall of the rectangular box 6 and extends to one side outside the rectangular box 6, and a knob 17 is fixedly installed on one end of the worm 14, thereby realizing stable and rapid adjustment of the position of the annular extrusion member 9 inside the connecting seat 2.

[0038] In one preferred embodiment, a threaded hole matched with the adjusting screw rod 15 is provided on the top of the annular movable plate 18, and the annular movable plate 18 is threadedly connected to the adjusting screw rod 15 through the threaded hole provided on the top of the annular movable plate 18.

[0039] In one embodiment, the inner diameter of the annular extrusion member 9 gradually decreases from bottom to top, and the top of the sealing sleeve 10 is inclined, which helps the sealing sleeve 10 to fit more closely to the outer wall of the valve stem 3 when the extrusion force is applied.

[0040] In one preferred embodiment, the knob 17 is made of aluminum alloy, so that the knob 17 can resist chemical corrosion and long-term use.

[0041] In one embodiment, a plurality of anti-slip grooves are provided on the outer wall of the knob 17 to increase the friction between the operator's hand and the knob 17 when the operator operates the knob 17, making the operation more convenient.

[0042] In one of the preferred embodiments, a sealing gasket is provided on the outer side of the bottom of the annular box body 5 to ensure the sealing of the connection between the bottom of the annular box body 5 and the top of the connecting seat 2 to prevent external dust and impurities from entering the interior of the connecting seat 2.

[0043] The working principle of the utility model is as follows: the parts not involved in the device are the same as the prior art or can be implemented by the prior art. During the use of the ball valve, as the sealing sleeve 10 wears, the fit between the sealing sleeve 10 and the outer wall of the valve stem 3 will become worse and worse. Without replacing the sealing sleeve 10, the knob 17 can be operated regularly. By turning the knob 17, the rotation of the knob 17 drives the worm 14 to rotate. Through the meshing of the worm 14 and the worm wheel 16, the two worm wheels 16 rotate synchronously. The rotation of the worm wheel 16 drives the adjusting screw 15 to rotate. By adjusting the screw 15 and the annular movable plate 18, the adjusting screw 15 rotates. The screw transmission and the sliding relationship between the annular movable plate 18 and the inner wall of the annular box 5 enable the annular movable plate 18 to move vertically stably. The movement of the annular movable plate 18 drives the push rod 7 to move. The movement of the push rod 7 drives the annular extrusion member 9 to move downward, increasing the extrusion force on the sealing sleeve 10, so that the sealing sleeve 10 can still maintain a close fit with the outer wall of the valve stem 3 even in the case of wear. During the use of the ball valve, the annular extrusion member 9 is continuously adjusted to enhance the sealing effect of the sealing sleeve 10, extend its service life, and avoid the need to frequently replace the sealing sleeve 10. In addition, by providing the annular sealing gasket 11, a double sealing effect can be achieved, further improving the sealing between the valve stem 3 and the connecting seat 2, and effectively preventing gas leakage.

[0044] During the use of the ball valve, when the annular extrusion member 9 is adjusted to the lowest position, the annular extrusion member 9 can no longer continue to increase the downward extrusion force on the sealing sleeve 10, and a new sealing sleeve 10 needs to be replaced. Because the handle 4 is fixed to the top of the valve stem 3 by bolts, the handle 4 can be directly removed from the top of the valve stem 3 by tools, and the annular box body 5 is threadedly connected to the inner wall of the top of the installation groove 8 through the annular connecting member 12, so that the annular box body 5 can be directly rotated, and the annular box body 5 drives the annular connecting member 12 to rotate, and the annular connecting member 12 can be removed from the top of the connecting seat 2, and then the annular box body 5 can be removed from the top of the connecting seat 2. The body 5 and the annular connector 12 slide upward from the outer wall of the valve stem 3 and can be directly removed from the top of the valve stem 3. At this time, the top opening of the installation groove 8 has no shielding structure, and the sealing sleeve 10 inside it can be directly taken out and then replaced. Then the above steps are performed in reverse to complete the installation of each structure. During the use of the ball valve, when the sealing sleeve 10 reaches the maximum degree of wear and the annular extrusion member 9 reaches the maximum adjustment position, the handle 4 and the annular connector 12 are detachable, so that the sealing sleeve 10 can be quickly replaced, which is convenient for maintenance and repair work, and has high practicality.

[0045] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A leak-proof gas ball valve, characterized in that: It includes: A valve body (1), a connecting seat (2) and a valve stem (3); a handle (4) is fixedly mounted on the top of the valve stem (3) by means of bolts; a mounting groove (8) is provided on the inner wall of the connecting seat (2), and the mounting groove (8) is communicated with the top of the connecting seat (2); the bottom of the inner wall of the mounting groove (8) is located on the outer wall of the valve stem (3) and is sleeved with an annular sealing gasket (11); a sealing sleeve (10) is provided inside the mounting groove (8) and is located on the top of the annular sealing gasket (11), and the sealing sleeve (10) is sleeved on the outer wall of the valve stem (3); an annular connecting piece (12) is provided at the top opening of the mounting groove (8), and the annular connecting piece (12) is sleeved on the outer wall of the valve stem (3); An annular box body (5) is fixedly installed on the top of the annular connecting member (12), and the annular box body (5) is sleeved on the outer wall of the valve stem (3). An annular movable plate (18) is slidably installed inside the annular box body (5). Both sides of the bottom of the annular box body (5) are provided with fixing holes (19). The bottom of the annular connecting member (12) is provided with sliding holes (13) corresponding to the positions and numbers of the fixing holes (19). Both sides of the bottom of the annular movable plate (18) are fixedly installed with push rods (7), and the push rods (7) pass through the fixing holes (19) and the sliding holes (13) and extend to the inside of the mounting groove (8); An annular extrusion piece (9) is fixedly mounted on the bottom end of the push rod (7), and the annular extrusion piece (9) is sleeved on the outer wall of the valve stem (3). The bottom of the annular extrusion piece (9) is in contact with the top of the sealing sleeve (10). A rectangular box body (6) is fixedly mounted on the rear side of the top of the annular box body (5), and an adjustment mechanism is arranged inside the rectangular box body (6).

2. The anti-leakage gas ball valve according to claim 1, characterized in that: An external thread is provided on the outer wall of the annular connecting piece (12), an internal thread is provided on the inner wall of the top opening of the installation groove (8), and the annular connecting piece (12) is threadedly connected to the top opening of the installation groove (8).

3. The anti-leakage gas ball valve according to claim 1, characterized in that: The adjusting mechanism comprises a worm (14), and the worm (14) is rotatably mounted inside a rectangular box (6), and adjusting screws (15) are rotatably mounted on both sides inside the rectangular box (6), and the bottom end of the adjusting screw (15) passes through the top of the annular box (5) and extends to the inside of the annular box (5) and is rotatably connected to a bearing mounted on the bottom of the annular box (5), and a worm wheel (16) is fixedly mounted on the outer wall of the top end of the two adjusting screws (15), and the worm wheel (16) is meshed with the adjusting screw (15), one end of the worm (14) passes through one side of the inner wall of the rectangular box (6) and extends to one side outside the rectangular box (6), and one end of the worm (14) is fixedly mounted with a knob (17).

4. The anti-leakage gas ball valve according to claim 1, characterized in that: A threaded hole matched with the adjusting screw rod (15) is provided on the top of the annular movable plate (18), and the annular movable plate (18) is threadedly connected to the adjusting screw rod (15) through the threaded hole provided on the top of the annular movable plate (18).

5. The anti-leakage gas ball valve according to claim 1, characterized in that: The inner diameter of the annular extrusion piece (9) gradually decreases from bottom to top, and the top of the sealing sleeve (10) is inclined.

6. The anti-leakage gas ball valve according to claim 3, characterized in that: The knob (17) is made of aluminum alloy.

7. The anti-leakage gas ball valve according to claim 3, characterized in that: A plurality of anti-slip grooves are provided on the outer wall of the knob (17).

8. The anti-leakage gas ball valve according to claim 1, characterized in that: A sealing gasket is arranged on the outer side of the bottom of the annular box body (5).

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