Plug valve of automatic grease injection structure

Abstract

The invention discloses a plug valve of an automatic grease injection structure. The plug valve comprises a valve body and a uniform grease injection mechanism. A valve groove is formed in the valve body, a valve element is rotationally connected into the valve groove, and a valve deck is fixedly connected to the upper surface of the valve body. The uniform grease injection mechanism comprises a rotating groove, a rotating disc, worm gear teeth, grease leaking holes and a worm, the rotating groove is formed in the upper surface of the valve body, the rotating disc is rotationally connected into the rotating groove, the worm gear teeth which are evenly distributed are arranged on the outer arc face of the rotating disc, and the worm is rotationally connected to the left side between the front inner wall and the rear inner wall of the rotating groove and connected with the worm gear teeth in a meshed mode; grease leaking holes are evenly distributed in the middle of the upper surface of the rotating disc, through holes are evenly distributed in the lower surface of the rotating groove, and the eight through holes are communicated with the valve groove. According to the plug valve of the automatic grease injection structure, it is guaranteed that the valve body is evenly filled with lubricating grease, and the service life of the plug valve is prolonged.

Description

Technical Field

[0001] The invention relates to the technical field of plug valves, in particular to a plug valve with an automatic grease injection structure. Background Art

[0002] Grease-injected plug valve is a special plug valve, which uses special grease to be injected from the top of the plug body between the valve body cone hole and the plug body to form an oil film to reduce the valve opening and closing torque, improve the sealing performance and service life. Grease-injected plug valve is usually used for sealing and lubrication of valves and pressure systems in high temperature and harsh environments. It can withstand a wide range of temperatures and high pressures, and can resist a variety of organic and inorganic chemicals.

[0003] In the prior art: The patent with authorization publication number CN202421340796.0 discloses an automatic grease injection plug valve, comprising: a valve body, a connecting pipe and a valve core, connecting pipes are provided on both sides of the valve body, a valve core extending to the outside of the top end is provided inside the valve body, three groups of grease injection grooves are provided at the front end of the valve body, a connecting frame is provided inside the valve body, two groups of first sealing plugs extending to the inside of the two groups of grease injection grooves are welded to the front end of the connecting frame, and the outer walls of the two groups of the first sealing plugs are sleeved with springs, the front end of the connecting frame is located between the two groups of first sealing plugs and a second sealing plug extending to the inside of the grease injection groove is welded, and two groups of guide grooves are provided on the inner wall of the valve body.

[0004] The above-mentioned plug valve has some problems in actual use. For example, when grease is injected, when the grease flows into the interior of the valve body, the grease cannot enter the valve body evenly, resulting in uneven distribution of the grease. The local contact surface cannot be lubricated, which reduces the service life of the plug valve. Summary of the invention

[0005] The technical problem to be solved by the present invention is to overcome the existing defects and provide a plug valve with an automatic grease injection structure to ensure that the grease is evenly filled into the valve body, extend the service life of the plug valve, and effectively solve the problems in the background technology.

[0006] To achieve the above-mentioned object, the present invention provides the following technical solutions: a plug valve with an automatic grease injection structure, comprising a valve body and a uniform grease injection mechanism;

[0007] The valve body is provided with a valve slot inside, a valve core is rotatably connected inside the valve slot, and a valve cover is fixedly connected to the upper surface of the valve body;

[0008] The uniform grease injection mechanism includes a rotating groove, a rotating disk, worm gear teeth, grease leakage holes and a worm. The rotating groove is opened on the upper surface of the valve body, and the rotating groove is rotatably connected to the rotating disk inside. The outer arc surface of the rotating disk is provided with uniformly distributed worm gear teeth. A worm is rotatably connected to the left side between the front and rear inner walls of the rotating groove. The worm is meshed with the worm gear teeth. Uniformly distributed grease leakage holes are provided in the middle of the upper surface of the rotating disk, and uniformly distributed through holes are opened on the lower surface of the rotating groove. The eight through holes are connected to the valve groove, thereby ensuring that the grease is evenly filled into the valve body and extending the service life of the plug valve.

[0009] Furthermore, the uniform grease injection mechanism also includes a press-to-grease injection component, which includes a fixed cylinder, a spring, a sliding column and an arc-shaped plug column. The fixed cylinder is evenly arranged on the upper surface of the valve cover, the interior of the fixed cylinder is slidably connected with the sliding column, the lower side of the sliding column is respectively provided with an arc-shaped plug column, the upper end of the sliding column is respectively fixedly connected with a spring, and the upper ends of the eight springs are respectively fixedly connected to the upper side wall of the fixed cylinder located at the same position, so as to realize the function of squeezing the grease and forcing it to flow downward.

[0010] Furthermore, the uniform grease injection mechanism also includes a grease injection port, which is opened on the left side of the upper surface of the valve cover, and the inner arc surface of the grease injection port is provided with an internal thread to realize the function of supplying grease.

[0011] Furthermore, the uniform grease injection mechanism also includes a convex ring and a limiting groove. The convex ring is fixedly connected to the lower surface of the valve cover and the lower side wall of the rotating groove respectively. The upper surface and the lower surface of the turntable are respectively provided with limiting grooves. The two limiting grooves are rotatably connected to the outer surfaces of the convex rings corresponding to the upper and lower positions respectively, so as to realize the function of limiting the position of the turntable.

[0012] Furthermore, a connecting rod is provided on the upper side of the valve core, and a rotating rod for opening and closing the valve body is fixedly connected to the upper end of the connecting rod to realize the function of opening and closing the valve body.

[0013] Furthermore, a sealing ring is fixedly connected to the middle part of the upper surface of the valve body, and the inner arc surface of the sealing ring is rotatably connected to the middle part of the outer arc surface of the connecting rod to achieve a sealing function.

[0014] Furthermore, the front end of the worm is fixedly connected to a grease injection handle, and the outer arc surface fixing sleeve of the grease injection handle is provided with a rubber anti-slip sleeve to provide power for assisting uniform grease injection.

[0015] Compared with the prior art, the present invention has the following beneficial effects:

[0016] The main structure of this plug valve adopts a worm gear structure to drive the turntable to rotate, and cooperates with the spring structure to evenly discharge the grease entering the valve body into the space between the inner arc surface of the valve slot and the outer arc surface of the valve core, and complete the lubrication between the valve slot and the valve core. It can quickly inject grease while ensuring that the grease is evenly filled into the valve body, thereby extending the service life of the plug valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the three-dimensional structure of the present invention;

[0018] Figure 2 It is a schematic diagram of the explosion structure of the present invention;

[0019] Figure 3 This is a schematic diagram of the valve cover structure of the present invention when viewed from above;

[0020] Figure 4 It is a schematic diagram of the partial structure of the uniform grease injection mechanism of the present invention;

[0021] Figure 5 This is a schematic diagram of the cross-sectional structure of the valve body of the present invention;

[0022] Figure 6 It is a structural schematic diagram of the pressing grease injection assembly of the present invention;

[0023] Figure 7 It is a structural schematic diagram of the grease injection pressing component and the grease leakage hole of the present invention.

[0024] In the figure: 1 valve body, 2 valve groove, 3 uniform grease injection mechanism, 31 rotating groove, 32 convex ring, 33 rotating disk, 34 limiting groove, 35 worm gear teeth, 36 grease leakage hole, 37 pressing grease injection assembly, 371 fixed cylinder, 372 spring, 373 sliding column, 374 arc plug column, 38 grease injection port, 39 worm, 4 valve cover, 5 valve core, 6 connecting rod, 7 grease injection handle, 8 valve body opening and closing rotating rod. DETAILED DESCRIPTION

[0025] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0026] See also Figure 1-7 This embodiment provides a technical solution: a plug valve with an automatic grease injection structure includes a valve body 1 and a uniform grease injection mechanism 3.

[0027] Among them, a valve groove 2 is opened inside the valve body 1, and a valve core 5 is rotatably connected inside the valve groove 2. A valve cover 4 is fixedly connected to the upper surface of the valve body 1. A connecting rod 6 is provided on the upper side of the valve core 5. A rotating rod 8 for opening and closing the valve body is fixedly connected to the upper end of the connecting rod 6. A sealing ring 9 is fixedly connected to the middle part of the upper surface of the valve body 1. The inner arc surface of the sealing ring 9 is rotatably connected to the middle part of the outer arc surface of the connecting rod 6. When using the plug valve, it can be fixedly connected to external equipment through the flanges on the left and right sides of the valve body 1.

[0028] The uniform grease injection mechanism 3 includes a rotating groove 31, a rotating disk 33, worm gear teeth 35, a grease leakage hole 36 and a worm 39. The rotating groove 31 is opened on the upper surface of the valve body 1, and the rotating groove 31 is rotatably connected with the rotating disk 33. The outer arc surface of the rotating disk 33 is provided with uniformly distributed worm gear teeth 35. The left side between the front and rear inner walls of the rotating groove 31 is rotatably connected with the worm gear 39, and the worm gear 39 is meshed with the worm gear teeth 35. The middle part of the upper surface of the rotating disk 33 is provided with uniformly distributed grease leakage holes 36, and the lower surface of the rotating groove 31 is provided with uniformly distributed through holes, and the eight through holes are connected to the valve groove 2; the uniform grease injection mechanism 3 also includes a pressing grease injection component 37, which includes a fixed cylinder 371, a spring 372, a sliding column 373 and an arc plug column 374. The fixed cylinder 371 is uniformly arranged on the upper surface of the valve cover 4, and the interior of the fixed cylinder 371 is slidably connected with the sliding column 373. The sliding column 3 The lower sides of 73 are respectively provided with arc-shaped plug columns 374, and the upper ends of the sliding columns 373 are respectively fixedly connected with springs 372, and the upper ends of the eight springs 372 are respectively fixedly connected to the upper side walls of the fixed cylinders 371 located at the same position; the uniform grease injection mechanism 3 also includes a grease injection port 38, which is opened on the left side of the upper surface of the valve cover 4, and the inner arc surface of the grease injection port 38 is provided with an internal thread; the uniform grease injection mechanism 3 also includes a convex ring 32 and a limiting groove 34, the convex ring 32 is respectively fixedly connected to the lower surface of the valve cover 4 and the lower side wall of the rotating groove 31, the upper surface and the lower surface of the rotating disk 33 are respectively provided with limiting grooves 34, and the two limiting grooves 34 are respectively rotatably connected to the outer surfaces of the convex rings 32 corresponding to the upper and lower positions, and the front end of the worm 39 is fixedly connected with a grease injection handle 7, and the outer arc surface fixed sleeve of the grease injection handle 7 is provided with a rubber anti-slip sleeve, and then the grease injection valve is screwed into the interior of the grease injection port 38 through the internal thread.

[0029] The present invention: when the plug valve is used, the flanges on the left and right sides of the valve body 1 can be used to fix the connection with the external equipment, and then the grease injection valve can be screwed into the grease injection port 38 through the internal thread. During use, the valve body opening and closing rotating rod 8 can be manually rotated so that the end of the valve body opening and closing rotating rod 8 can rotate around the central axis of the connecting rod 6, thereby driving the valve core 5 to rotate forward and reverse in the valve groove 2, thereby causing the flow hole in the middle of the valve core 5 to rotate forward, forward and reverse, thereby realizing the opening and closing function of the plug valve;

[0030] After the plug valve has been used for a period of time, it is necessary to perform grease injection to ensure smooth rotation of the valve core 5. At this time, the grease injection valve can be adjusted to continuously introduce grease into the upper inner side of the turntable 33 (the grease will remain between the upper surface of the turntable 33 and the lower surface of the valve cover 4. The inner arc surface of the turntable 33 extends upward with a fixed cylinder. The grease is limited by the fixed cylinder and will not flow into the sealing ring 9). During this period, the grease injection handle 7 can be manually rotated to drive the worm 39 to rotate, and then the turntable 33 is driven to rotate through the worm gear teeth 35. During the rotation of the turntable 33, the arc-shaped plug 374 will stir the grease so that it fills the middle between the turntable 33 and the valve cover 4 more evenly.

[0031] Whenever the arc-shaped plug 374 corresponds to the upper and lower positions of the grease leakage hole 36, the arc-shaped plug 374 will be pushed into the grease leakage hole 36 under the influence of the elastic force of the spring 372. Thanks to the bucket-shaped design of the grease leakage hole 36, when the arc-shaped plug 374 enters the grease leakage hole 36, the grease will be pushed into the grease leakage hole 36, and then pushed along the through hole to between the inner arc surface of the valve groove 2 and the outer arc surface of the valve core 5, completing a relatively uniform grease injection operation; whenever the arc-shaped plug 374 leaves the grease leakage hole 36, the arc surface of the arc-shaped plug 374 will stick to the orifice of the grease leakage hole 36, and push the arc-shaped plug 374 upward, to ensure the smooth effect of the arc-shaped plug 374 leaving and entering the grease leakage hole 36.

[0032] The above descriptions are merely embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A plug valve with automatic grease injection structure, characterized in that: It comprises a valve body (1) and a uniform grease injection mechanism (3); The valve body (1) has a valve groove (2) formed inside, a valve core (5) is rotatably connected inside the valve groove (2), and a valve cover (4) is fixedly connected to the upper surface of the valve body (1); The uniform grease injection mechanism (3) comprises a rotating groove (31), a rotating disk (33), worm gear teeth (35), grease leakage holes (36) and a worm (39); the rotating groove (31) is provided on the upper surface of the valve body (1); the rotating groove (31) is rotatably connected to the rotating disk (33); the outer arc surface of the rotating disk (33) is provided with uniformly distributed worm gear teeth (35); the left side between the front and rear inner walls of the rotating groove (31) is rotatably connected to the worm gear (39); the worm gear (39) is meshedly connected to the worm gear teeth (35); the middle part of the upper surface of the rotating disk (33) is provided with uniformly distributed grease leakage holes (36); the lower surface of the rotating groove (31) is provided with uniformly distributed through holes; the eight through holes are connected to the valve groove (2).

2. The plug valve with automatic grease injection structure according to claim 1, characterized in that: The uniform grease injection mechanism (3) also includes a press-to-grease injection assembly (37), which includes a fixed cylinder (371), a spring (372), a sliding column (373) and an arc-shaped plug column (374). The fixed cylinder (371) is evenly arranged on the upper surface of the valve cover (4), and the interior of the fixed cylinder (371) is slidably connected to the sliding column (373). The lower side of the sliding column (373) is respectively provided with an arc-shaped plug column (374), and the upper end of the sliding column (373) is respectively fixedly connected to the spring (372), and the upper ends of the eight springs (372) are respectively fixedly connected to the upper side wall of the fixed cylinder (371) located at the same position.

3. The plug valve with automatic grease injection structure according to claim 1, characterized in that: The uniform grease injection mechanism (3) further comprises a grease injection port (38), wherein the grease injection port (38) is opened on the left side of the upper surface of the valve cover (4), and the inner arc surface of the grease injection port (38) is provided with an internal thread.

4. The plug valve with automatic grease injection structure according to claim 1, characterized in that: The uniform grease injection mechanism (3) further comprises a convex ring (32) and a limiting groove (34); the convex ring (32) is fixedly connected to the lower surface of the valve cover (4) and the lower side wall of the rotating groove (31), respectively; the upper surface and the lower surface of the rotating disk (33) are respectively provided with limiting grooves (34); the two limiting grooves (34) are respectively rotatably connected to the outer surfaces of the convex ring (32) corresponding to the upper and lower positions.

5. The plug valve with automatic grease injection structure according to claim 1, characterized in that: A connecting rod (6) is provided on the upper side of the valve core (5), and a rotating rod (8) for opening and closing the valve body is fixedly connected to the upper end of the connecting rod (6).

6. The plug valve with automatic grease injection structure according to claim 1, characterized in that: A sealing ring (9) is fixedly connected to the middle portion of the upper surface of the valve body (1), and the inner arc surface of the sealing ring (9) is rotatably connected to the middle portion of the outer arc surface of the connecting rod (6).

7. The plug valve with automatic grease injection structure according to claim 1, characterized in that: The front end of the worm (39) is fixedly connected to a grease injection handle (7), and the outer arc surface fixing sleeve of the grease injection handle (7) is provided with a rubber anti-slip sleeve.

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