Valve with auxiliary seal

Abstract

The valve comprises a valve body, a valve cover is connected to the valve body through a bolt, a valve rod is rotationally connected into the valve cover, a ball valve is detachably connected to the lower end of the valve rod, a rotating shaft is arranged at the lower end of the ball valve, a groove is formed in the bottom face of the middle of the valve body, and the rotating shaft is rotationally arranged in the groove. Protruding rings are arranged on two closed faces of the ball valve, main sealing gaskets are fixed to the end faces of the ends, away from the valve, of the protruding rings, sealing seats are fixed to the two sides in the valve body, notches matched with the protruding rings are formed in the opposite faces of the two sealing seats, auxiliary sealing gaskets are arranged in the notches, and when the ball valve is in a closed state, the protruding rings are embedded in the notches. The main sealing gasket and the auxiliary sealing gasket are in end-to-end butt joint. After the ball valve is closed, the convex rings on the two sides of the ball valve just abut against the interiors of the notches of the sealing seats at the corresponding ends, and the main sealing gaskets on the convex rings are connected with the auxiliary sealing gaskets in the notches, so that the dual-sealing effect is achieved, and the sealing performance is improved.

Description

Technical Field

[0001] This utility model relates to the field of valve technology, specifically to a valve with auxiliary sealing. Background Technology

[0002] Ball valves are devices used for the regulation and control of fluids, and are particularly suitable for media containing fibers, small solid particles, etc.

[0003] The current ball valve has the following problems: (1) After the ball valve is closed, the sealing is achieved only by the ball itself and the channel in the valve body in close contact, and the sealing effect is not good; (2) The valve stem and the ball are either connected by threads or only by a set of screws. After long-term rotation, the valve stem and the ball are prone to slippage; (3) A sealing sleeve is usually provided at the contact point between the valve stem and the valve cover to prevent liquid from leaking out of the valve stem. However, after long-term rotation of the valve stem, the sealing sleeve may be worn. Since the sealing sleeve is located inside the valve cover, it is difficult to replace. Utility Model Content

[0004] In view of the shortcomings of the prior art, the present invention provides a valve with auxiliary sealing to solve the problems mentioned in the background art.

[0005] To solve the above-mentioned technical problems, this utility model provides the following technical solution:

[0006] A valve with auxiliary sealing includes a valve body that extends through the valve body from left to right. A valve cover is bolted to the valve body, and a valve stem is rotatably connected to the valve cover via a rotary bearing. A ball valve is detachably connected to the lower end of the valve stem. The lower end of the ball valve has a downwardly protruding rotating shaft. A groove is provided on the bottom surface of the middle part of the valve body, and a lower bearing sleeve is fixed in the groove. A lower sealing sleeve is provided in the lower bearing sleeve. The rotating shaft is rotatably disposed in the lower sealing sleeve. The two sealing surfaces of the ball valve have convex rings with trapezoidal cross-sections. A main sealing gasket is fixed to the end face of the convex ring away from the valve. Sealing seats are fixed on both sides of the valve body. The opposite surfaces of the two sealing seats have grooves that match the convex rings. A secondary sealing gasket is provided in the grooves. When the ball valve is in the closed state, the convex rings are embedded in the grooves, and the main sealing gasket and the secondary sealing gasket are aligned end to end. A cover is bolted to the upper end of the valve cover, and the upper end of the valve stem extends into the cover. A drive mechanism for driving the valve stem to rotate is provided on the cover.

[0007] Preferably, the drive mechanism includes a shaft rotatably connected to the housing via a rotary bearing, a wheel connected to the outer end of the shaft, a first bevel gear fixedly connected to the inner end of the shaft, and a second bevel gear fixedly connected to the upper end of the valve stem, wherein the first bevel gear meshes with the second bevel gear.

[0008] Through the above technical solution, rotating the wheel drives the shaft to rotate. During the rotation of the shaft, the valve stem is driven to rotate through the cooperation of the first bevel gear and the second bevel gear, thereby driving the ball valve to rotate, so as to realize the opening or closing of the valve body.

[0009] Preferably, one side of the lower outer wall of the valve stem is provided with an L-shaped notch, and the other side is a bevel. The front and rear sides of the lower part of the valve stem are straight edges. A connecting seat is fixed to the top of the ball valve. The connecting seat has first screw holes on both sides, and two limiting screws are connected through the first screw holes. One limiting screw abuts against the notch, and the other limiting screw abuts against the bevel. Connecting blocks are provided on the front and rear sides of the connecting seat. The two connecting blocks abut against the straight edges of the valve stem, and the valve stem, connecting blocks and connecting seat are fixedly connected by screws.

[0010] With the above technical solution, the lower end of the valve stem is secured by two limiting screws. One limiting screw is engaged in the notch, and the other is engaged on the inclined side, thus fastening the valve stem to the connecting seat. In addition, the connecting seat is equipped with two connecting blocks, which are connected to the straight edge of the valve stem by screws, thereby further fixing the valve stem to the connecting seat, preventing slippage between the valve stem and the connecting seat, and extending the service life.

[0011] Preferably, the lower part of the valve cover is provided with an upper bearing sleeve, the valve stem is rotatably disposed in the upper bearing sleeve, and an upper sealing sleeve is provided in the upper bearing sleeve.

[0012] By employing the above technical solution and incorporating upper and lower bearing sleeves, the ball valve can rotate more smoothly. The upper and lower sealing sleeves further enhance sealing performance.

[0013] Preferably, a sealing ring is provided at the connection between the valve cover and the valve body.

[0014] The above technical solution, by setting a sealing ring, can prevent liquid in the valve body from leaking from the valve cover and its connection.

[0015] Preferably, the valve cover has a through hole to expose part of the valve stem. A filling groove is provided in the valve cover (2) near the through hole. An elastic sealing sleeve is placed in the filling groove. The sealing sleeve has a cut and can be unfolded into a plane along the cut. A retaining strip is provided on one cut of the sealing sleeve, and a retaining groove matching the retaining strip is provided on the other cut. After the sealing sleeve covers the valve stem, the retaining strip is locked in the retaining groove. A pressure cap is fastened in the filling groove. The pressure cap is pressed tightly on the sealing sleeve. One end of the pressure cap is connected to the valve cover by a screw. The valve stem is rotatably set in the pressure cap.

[0016] The above technical solution, through the setting of the sealing sleeve, can prevent liquid from leaking outward from the connection between the valve stem and the valve cover. When the sealing sleeve is damaged and the sealing performance is poor, the gland can be opened, the sealing sleeve can be removed, and a new sealing sleeve can be replaced, making maintenance convenient.

[0017] Compared with the prior art, the beneficial effects of this utility model are:

[0018] (1) After the ball valve is closed, the convex rings on both sides just abut against the groove of the sealing seat at one end, and the main sealing gasket on the convex ring and the secondary sealing gasket in the groove are connected, thus playing a double sealing role and improving the sealing performance.

[0019] (2) The valve stem is stably fixed on the ball valve by the action of the limiting screw, connecting block and screw, which prevents the valve stem from slipping after long-term use and extends the service life.

[0020] (2) By setting the sealing sleeve, liquid can be prevented from leaking out from the connection between the valve stem and the valve cover. When the sealing sleeve is damaged and the sealing performance is poor, the pressure cover can be opened, the sealing sleeve can be taken out, and a new sealing sleeve can be replaced. Maintenance is convenient. Attached Figure Description

[0021] Figure 1 This is a schematic diagram of the present invention;

[0022] Figure 2 This is a schematic diagram of a ball valve and its stem.

[0023] Figure 3 This is a cross-sectional view of the present invention;

[0024] Figure 4 for Figure 3 A magnified view of a portion of the image;

[0025] Figure 5 This is a schematic diagram of the sealing sleeve;

[0026] In the diagram: 1-Valve body, 2-Valve cover, 3-Valve stem, 4-Ball valve, 5-Shaft, 6-Groove, 7-Lower bearing sleeve, 8-Raised ring, 9-Main sealing gasket, 10-Sealing seat, 11-Secondary sealing gasket, 12-Cover, 13-Shaft, 14-Roller, 15-First bevel gear, 16-Second bevel gear, 17-Notch, 18-Bevel edge, 19-Straight edge, 20-Connecting seat, 21-Limiting screw, 22-Connecting block, 23-Upper bearing sleeve, 24-Sealing ring, 25-Through hole, 26-Sealing sleeve, 27-Pressure cap, 28-Clamping strip. Detailed Implementation

[0027] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0028] Example 1

[0029] Please see Figures 1-4 A valve with auxiliary sealing includes a valve body 1 that extends through both sides. A valve cover 2 is bolted to the valve body 1. A sealing ring 24 is provided at the connection between the valve cover 2 and the valve body 1 to prevent leakage of the medium from the connection. A valve stem 3 is rotatably connected to the valve cover 2 via a rotary bearing. A ball valve 4 is detachably connected to the lower end of the valve stem 3. A downwardly protruding rotating shaft 5 is provided at the lower end of the ball valve 4. A groove 6 is provided on the bottom surface of the middle part of the valve body 1. A lower bearing sleeve 7 is fixed in the groove 6. A lower sealing sleeve is provided inside the lower bearing sleeve 7. The rotating shaft 5 is rotatably disposed in the lower sealing sleeve. An upper bearing sleeve 23 is provided in the lower part of the valve cover 2. The valve stem 3 is rotatably disposed in the upper bearing sleeve 23. An upper sealing sleeve is provided inside the upper bearing sleeve 23. By setting the upper bearing sleeve 23 and the lower bearing sleeve 7, the rotation of the ball valve 4 can be made smoother. In addition, the setting of the upper and lower sealing sleeves can improve the sealing performance and prevent the medium from leaking or flowing.

[0030] The lower end of the valve stem 3 is detachably connected to a ball valve 4. Specifically, one side of the lower outer wall of the valve stem 3 has an L-shaped notch 17, and the other side has a beveled edge 18. The front and rear sides of the lower part of the valve stem 3 have straight edges 19. A connecting seat 20 is fixed to the top of the ball valve 4. The connecting seat 20 has first screw holes on both sides, and two limiting screws 21 are connected through the first screw holes. One limiting screw 21 abuts against the notch 17, and the other limiting screw 21 abuts against the beveled edge 18. Connecting blocks 22 are provided on the front and rear sides of the connecting seat 20. The two connecting blocks 22 abut against the straight edges 19 of the valve stem. The valve stem 3, connecting blocks 22, and connecting seat 20 are fixedly connected by screws. The lower end of the valve stem 3 is clamped by the two limiting screws 21. One limiting screw 21 is clamped in the notch 17, and the other limiting screw 21 is clamped on the beveled edge 18, which can fasten the valve stem 3 and the connecting seat 20. In addition, the connecting seat 20 is provided with two connecting blocks 22, and the connecting blocks 22 are connected to the straight edge 19 of the valve stem by screws, thereby further fixing the valve stem 3 and the connecting seat 20, playing a double fastening role, preventing slippage between the valve stem 3 and the connecting seat 20, and extending the service life.

[0031] The ball valve 4 has two closed surfaces with raised rings 8. The cross-section of the raised rings 8 is trapezoidal, and a main sealing gasket 9 is fixed to the end face of the raised rings 8 away from the valve. Sealing seats 10 are fixed on both sides inside the valve body 1. The opposite surfaces of the two sealing seats 10 have grooves that match the raised rings. A secondary sealing gasket 11 is provided in the groove. When the ball valve 4 is in the closed state, the raised rings 8 are embedded in the grooves, and the main sealing gasket 9 and the secondary sealing gasket 11 are aligned end to end. The upper end of the valve cover 2 is connected to the cover 12 by bolts. The upper end of the valve stem 3 extends into the cover 12. The cover 12 is provided with a drive mechanism for driving the valve stem 3 to rotate. The drive mechanism includes a shaft 13 rotatably connected to the cover through a rotary bearing, a wheel 14 connected to the outer end of the shaft, a first bevel gear 15 fixedly connected to the inner end of the shaft, and a second bevel gear 16 fixedly connected to the upper end of the valve stem. The first bevel gear 15 and the second bevel gear 16 mesh. Rotating the wheel 14 drives the shaft 13 to rotate. During the rotation of the shaft 13, the valve stem 3 is driven to rotate through the cooperation of the first bevel gear 15 and the second bevel gear 16, thereby driving the ball valve 4 to rotate, so as to realize the opening or closing of the valve body 1.

[0032] When the valve body 1 is closed, the convex rings 8 on both sides of the ball valve 4 abut against the groove of the sealing seat 10 at one end, and the main sealing gasket 9 on the convex ring 8 and the secondary sealing gasket 11 in the groove are connected, thus playing a double sealing role and improving the sealing performance.

[0033] Example 2

[0034] The difference between this embodiment and Embodiment 1 is that, as Figure 3 and Figure 5 As shown, the valve cover 2 has a through hole 25 to expose part of the valve stem 3. A filling groove is provided inside the valve cover 2 near the through hole. An elastic sealing sleeve 26 is placed in the filling groove. The sealing sleeve 26 has a cut and can be unfolded into a plane along the cut. A retaining strip 28 is provided on one cut of the sealing sleeve 26, and a retaining groove matching the retaining strip 28 is provided on the other cut. After the sealing sleeve 26 covers the valve stem 3, the retaining strip 28 is locked in the retaining groove. A pressure cap 27 is fastened in the filling groove. The pressure cap is pressed tightly on the sealing sleeve 26. One end of the pressure cap 27 is connected to the valve cover 2 by a screw. The valve stem 3 is rotatably disposed in the pressure cap 27.

[0035] The sealing sleeve 26 prevents liquid from leaking outwards from the connection between the valve stem 3 and the valve cover 2. If the sealing sleeve 26 is damaged, resulting in poor sealing, the gland 27 can be opened to remove the sealing sleeve 26. A new sealing sleeve 26 can then be fitted over the valve stem, with the retaining strip 28 at one end engaging with the groove at the other end. The sealing sleeve 26 is then inserted into the filling groove. Due to its elasticity, the sealing sleeve expands outwards within the filling groove due to the elastic force, thus achieving a seal. Replacing the sealing sleeve does not require removing the valve cover from the valve stem, improving maintenance convenience.

[0036] It should be noted that the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitation, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0037] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A valve with an auxiliary seal, characterized by: The utility model provides a valve, including left and right through valve body (1), bolted with valve cover (2) on valve body (1), rotatably connected with valve stem (3) in valve cover (2) through rotary bearing, the lower end of valve stem (3) is detachably connected with ball valve (4), the lower end of ball valve (4) is equipped with the downward protruding rotation axis (5), the bottom surface of the middle part of valve body (1) is equipped with recess (6), is fixed with lower bearing sleeve (7) in recess (6), is equipped with lower sealing sleeve in lower bearing sleeve (7), rotation axis (5) rotation is arranged in lower sealing sleeve, is equipped with convex ring (8) on the two closed surfaces of ball valve (4), the section of convex ring (8) is trapezoidal, and the end face of convex ring (8) away from the end of valve is fixed with main sealing pad (9), is fixed with sealing seat (10) in the both sides in valve body (1), the opposite surface of two sealing seats (10) is equipped with the notch of matching with convex ring, is equipped with auxiliary sealing pad (11) in notch, when ball valve (4) is in the closed state, convex ring (8) is embedded in notch, and main sealing pad (9) and auxiliary sealing pad (11) butt joint, the upper end of valve cover (2) is bolted with cover shell (12), the upper end of valve stem (3) extends to cover shell (12), cover shell (12) is equipped with the drive mechanism of driving valve stem (3) rotation.

2. A valve with an auxiliary seal according to claim 1, characterized in that: The drive mechanism comprises a shaft rod (13) rotatably connected to the cover shell by a rotary bearing, a rotating wheel (14) connected to the outer end of the shaft rod, a first bevel gear (15) fixedly connected to the inner end of the shaft rod, and a second bevel gear (16) fixedly connected to the upper end of the valve stem, the first bevel gear (15) being engaged with the second bevel gear (16).

3. A valve with an auxiliary seal according to claim 2, characterized in that: One side of the outer wall of the lower part of the valve stem (3) is provided with an L-shaped notch (17), and the other side is a bevel (18). The front and rear sides of the lower part of the valve stem (3) are straight edges (19). The top of the ball valve (4) is fixed with a connecting seat (20). Two sides of the connecting seat (20) are provided with first screw holes, and two limiting screws (21) are connected through the first screw holes. One of the limiting screws (21) abuts against the notch (17), and the other limiting screw (21) abuts against the bevel (18). The front and rear sides of the connecting seat (20) are provided with connecting blocks (22). The two connecting blocks (22) abut against the straight edges (19) of the valve stem. The valve stem (3), the connecting blocks (22), and the connecting seat (20) are fixedly connected by screws.

4. A valve with an auxiliary seal according to claim 3, characterized in that: The lower part of the valve cover (2) is provided with an upper bearing sleeve (23), and the valve stem (3) is rotatably arranged in the upper bearing sleeve (23). The upper bearing sleeve (23) is provided with an upper sealing sleeve.

5. A valve with an auxiliary seal according to claim 4, characterized in that: A sealing ring (24) is arranged at the connection between the valve cover (2) and the valve body (1).

6. A valve with an auxiliary seal according to claim 5, characterized in that: The valve cover (2) is provided with a through hole (25) to expose part of the valve stem (3), and a filling groove is arranged near the through hole in the valve cover (2), and an elastic sealing sleeve (26) is arranged in the filling groove, the sealing sleeve (26) is provided with a cut, and can be unfolded into a plane along the cut, a clamping strip (28) is arranged on one cut of the sealing sleeve (26), and a clamping groove matched with the clamping strip (28) is arranged on the other cut, after the sealing sleeve (26) is covered on the valve stem (3), the clamping strip (28) is clamped in the clamping groove, a gland (27) is buckled in the filling groove, the gland is tightly pressed on the sealing sleeve (26), one end of the gland (27) is connected on the valve cover (2) through a screw, and the valve stem (3) is rotatably arranged in the gland (27).

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