Leak-proof straight pipe flange ball valve

Abstract

The utility model discloses a leakproof straight pipe flange ball valve which comprises a valve rod and a positioning cover, the valve rod is arranged in the middle of the inside of the positioning cover, an installation sleeve is arranged outside the upper end of the valve rod, a handle is fixed on one side of the installation sleeve, a connecting rod is fixed at the upper end of the valve rod, a nut is matched with the connecting rod in a threaded mode, and the nut is connected with the valve rod. Inserting grooves are formed in the two sides of the front end of the valve rod, an inserting rod base is arranged in the mounting sleeve, the two ends of the inserting rod base are slidably connected with the inserting grooves, threaded columns are arranged on the two sides of the rear end of the inserting rod base, limiting sleeves are in threaded fit with the outer walls of the threaded columns, and a receding groove is formed in the position, corresponding to the handle, of one side of the protective cover. A supporting plate is arranged at the lower end of the mounting sleeve, and guide blocks are arranged on the two sides of the lower end of the supporting plate. The handle is easy to replace, and the sealing ring is convenient to replace.

Description

Technical Field

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

[0002] A ball valve uses a ball as its opening and closing element. This opening and closing element, with a through hole, is driven by the valve stem and rotates around the ball valve's axis, regulating and controlling the fluid. In my country, ball valves are widely used in industries such as petroleum refining, long-distance pipelines, chemicals, papermaking, pharmaceuticals, water conservancy, electric power, municipal administration, and steel, playing a crucial role in the national economy. They feature a 90-degree rotating action, a spherical plug with a circular through hole or channel running through its axis.

[0003] Although the existing ball valve can prevent liquid leakage, it still has some disadvantages. First, the handle needs to be turned frequently to control the opening and closing of the valve. The handle and the valve stem are welded together. If the handle is damaged, the ball valve needs to be replaced together. Secondly, the sealing ring used for sealing will deteriorate in sealing performance due to wear and aging after a period of use, making it easy to leak liquid. Moreover, the sealing ring cannot be replaced, so the ball valve needs to be replaced together, which increases the replacement cost. Utility Model Content

[0004] The purpose of the utility model is to provide a leakage-proof straight pipe flange ball valve to solve the problems raised in the above background technology.

[0005] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a leakage-proof straight pipe flange ball valve, comprising a valve stem and a positioning cover, the valve stem being arranged in the middle of the interior of the positioning cover, a mounting sleeve being provided on the outside of the upper end of the valve stem, and a handle being fixed on one side of the mounting sleeve, a connecting rod being fixed on the upper end of the valve stem, and a nut being threaded on the connecting rod, slots being provided on both sides of the front end of the valve stem, a rod seat being provided in the mounting sleeve, and both ends of the rod seat being slidably connected to the slot, threaded columns being provided on both sides of the rear end of the rod seat, and the outer wall of the threaded column being threaded with a limiting sleeve, the rod seat being inserted into the empty slot and the slot of the mounting sleeve in turn, and the limiting sleeve being screwed onto the threaded column, so that the handle is installed on the upper end of the valve stem.

[0006] Preferably, a protective cover is provided on the outside of the connecting rod, and a clearance groove is provided on one side of the protective cover corresponding to the handle, and the protective cover protects the upper end of the positioning cover.

[0007] Preferably, a support plate is provided at the lower end of the mounting sleeve, and guide blocks are provided on both sides of the lower end of the support plate.

[0008] Preferably, an annular guide rail is provided in the middle of the upper end of the positioning cover, and the annular guide rail is slidably connected to the guide block. The upper end of the positioning cover limits the guide block through the annular guide rail, which is beneficial to the subsequent stable rotation of the handle.

[0009] Preferably, a clamping ring is provided at the upper end of the positioning cover, and a water-expandable rubber ring is provided at the lower end of the clamping ring. The positioning cover is put on the upper end of the valve body, and the clamping ring can position the water-expandable rubber ring, which can prevent poor sealing when exposed to water.

[0010] Preferably, a valve body is provided at the lower end of the positioning cover, and a sphere is provided in the middle of the valve body, and the upper end of the sphere is fixedly connected to the lower end of the valve stem.

[0011] Preferably, a sealing ring is provided inside the upper end of the valve body, and a gasket is provided on the edge of the upper end of the valve body. The sealing ring can improve the sealing performance between the valve body and the valve stem, and the gasket can prevent loosening.

[0012] Preferably, a flange is provided on the edge of the lower end of the positioning cover, and bolts are equidistantly threaded on the flange, and the lower ends of the bolts are threadedly engaged with the upper end of the valve body. The bolts can be screwed into the through holes on the flange in sequence, and then the lower ends of the bolts are screwed into the upper end of the valve body, so that the positioning cover can be installed on the upper end of the valve body.

[0013] Compared with the prior art, the beneficial effects of the present invention are: easy replacement of the handle and convenient replacement of the sealing ring;

[0014] (1) The mounting sleeve can be passed through the connecting rod and mounted on the upper end of the valve stem so that the empty groove of the mounting sleeve is aligned with the slot. The rod seat is inserted into the empty groove and the slot of the mounting sleeve in turn. From the rear of the mounting sleeve, the limiting sleeve is screwed onto the threaded column so that the handle is mounted on the upper end of the valve stem. Subsequently, a nut is screwed onto the thread on the connecting rod to limit the protective cover, which is conducive to protecting the upper end of the positioning cover through the protective cover. In addition, the upper end of the positioning cover is limited to the guide block through the annular guide rail, which is conducive to the subsequent stable rotation of the handle and easy replacement of the handle.

[0015] (2) A sealing ring can be put on the valve body, and then the sealing ring can be pushed into the middle of the valve body. The sealing ring can improve the sealing between the valve body and the valve stem. A gasket can be pushed into the upper edge of the valve body to prevent it from loosening. Then, a positioning cover can be put on the upper end of the valve body. The clamping ring can position the water-expanding rubber ring. The water-expanding rubber ring can prevent poor sealing when it comes into contact with water. Then, bolts can be screwed into the through holes on the flange in sequence, and then the lower ends of the bolts can be screwed into the upper end of the valve body. The positioning cover can be installed on the upper end of the valve body to facilitate the replacement of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the main cross-sectional structure of the utility model;

[0017] Figure 2 This is a schematic diagram of the main structure of the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the positioning cover and the mounting sleeve of the present utility model;

[0019] Figure 4 This is a schematic diagram of the cross-sectional structure of the positioning cover of the present utility model;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the rod inserting seat and the threaded sleeve of the present invention;

[0021] In the figure: 1. sphere; 2. valve body; 3. bolt; 4. gasket; 5. handle; 6. connecting rod; 7. nut; 8. protective cover; 9. positioning cover; 10. valve stem; 11. sealing ring; 12. water-swelling rubber ring; 13. clamping ring; 14. annular guide rail; 15. clearance groove; 16. support plate; 17. mounting sleeve; 18. rod seat; 19. slot; 20. guide block; 21. flange; 22. threaded column; 23. limit sleeve. DETAILED DESCRIPTION

[0022] The following is a clear and complete description of the technical solutions in the embodiments of the present invention in conjunction with the accompanying drawings. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0023] See also Figure 1-5 , the utility model provides an embodiment: a leakage-proof straight pipe flange ball valve, including a valve stem 10 and a positioning cover 9, the valve stem 10 is arranged in the middle of the positioning cover 9, a mounting sleeve 17 is provided on the outside of the upper end of the valve stem 10, and a handle 5 is fixed to one side of the mounting sleeve 17, a support plate 16 is provided at the lower end of the mounting sleeve 17, a connecting rod 6 is fixed to the upper end of the valve stem 10, and a nut 7 is threaded on the connecting rod 6, slots 19 are provided on both sides of the front end of the valve stem 10, a rod seat 18 is provided in the mounting sleeve 17, and both ends of the rod seat 18 are slidably connected to the slot 19, threaded columns 22 are provided on both sides of the rear end of the rod seat 18, and the outer wall of the threaded column 22 is threadedly fitted with a limiting sleeve 23;

[0024] When in use, the mounting sleeve 17 can be passed through the connecting rod 6 and sleeved on the upper end of the valve stem 10, so that the empty groove of the mounting sleeve 17 is aligned with the slot 19, and the rod seat 18 is inserted into the empty groove of the mounting sleeve 17 and the slot 19 in sequence. From the rear of the mounting sleeve 17, the limit sleeve 23 is screwed onto the threaded column 22, so that the handle 5 is installed on the upper end of the valve stem 10;

[0025] A protective cover 8 is provided on the outside of the connecting rod 6, and a clearance groove 15 is provided on one side of the protective cover 8 corresponding to the handle 5;

[0026] When in use, screw the nut 7 onto the thread on the connecting rod 6 to limit the protective cover 8, so that the upper end of the positioning cover 9 can be protected by the protective cover 8;

[0027] Guide blocks 20 are provided on both sides of the lower end of the support plate 16, and an annular guide rail 14 is provided in the middle of the upper end of the positioning cover 9, and the annular guide rail 14 is slidably connected to the guide blocks 20;

[0028] When in use, the upper end of the positioning cover 9 limits the guide block 20 through the annular guide rail 14, which is conducive to the subsequent stable rotation of the handle 5;

[0029] The lower end of the positioning cover 9 is provided with a valve body 2, and a ball 1 is provided in the middle of the valve body 2, and the upper end of the ball 1 is fixedly connected to the lower end of the valve stem 10. A sealing ring 11 is provided inside the upper end of the valve body 2, and a gasket 4 is provided on the upper edge of the valve body 2;

[0030] When in use, the sealing ring 11 can be put on the valve body 2, and then the sealing ring 11 can be pushed into the middle of the valve body 2. The sealing ring 11 can improve the sealing performance between the valve body 2 and the valve stem 10, and the gasket 4 can be pushed into the upper edge of the valve body 2 to prevent it from loosening.

[0031] A compression ring 13 is provided at the upper end of the interior of the positioning cover 9, and a water-swellable rubber ring 12 is provided at the lower end of the compression ring 13;

[0032] When in use, the positioning cover 9 is put on the upper end of the valve body 2, and the compression ring 13 can position the water-expandable rubber ring 12, which can prevent poor sealing when exposed to water;

[0033] A flange 21 is provided on the edge of the lower end of the positioning cover 9, and bolts 3 are equidistantly threaded on the flange 21, and the lower ends of the bolts 3 are threadedly engaged with the upper end of the valve body 2;

[0034] When in use, the bolts 3 can be screwed into the through holes on the flange 21 in sequence, and then the lower ends of the bolts 3 are screwed into the upper end of the valve body 2, and the positioning cover 9 can be installed on the upper end of the valve body 2;

[0035] When the embodiment of the present application is in use: first, the sealing ring 11 can be put on the valve body 2, and then the sealing ring 11 can be pushed into the middle of the inside of the valve body 2. The sealing ring 11 can improve the sealing performance of the valve body 2 and the valve stem 10, and the gasket 4 can be pushed into the upper edge of the valve body 2 to prevent the gasket 4 from loosening. Then, the positioning cover 9 can be put on the upper end of the valve body 2, and the clamping ring 13 can position the water-expandable rubber ring 12. The water-expandable rubber ring 12 can prevent poor sealing when it comes into contact with water. Then, the bolts 3 can be screwed into the through holes on the flange 21 in sequence, and then the lower ends of the bolts 3 can be screwed into the upper end of the valve body 2. The positioning cover 9 can be installed on the upper end of the valve body 2, and then the mounting sleeve 17 can be installed. Pass the connecting rod 6 and sleeve it on the upper end of the valve stem 10, so that the empty groove of the mounting sleeve 17 is aligned with the slot 19, and the rod seat 18 is inserted into the empty groove and slot 19 of the mounting sleeve 17 in turn. From the rear of the mounting sleeve 17, screw the limiting sleeve 23 onto the threaded column 22, so that the handle 5 is installed on the upper end of the valve stem 10. Then, screw the nut 7 onto the thread on the connecting rod 6 to limit the protective cover 8, which is conducive to protecting the upper end of the positioning cover 9 through the protective cover 8. In addition, the upper end of the positioning cover 9 limits the guide block 20 through the annular guide rail 14, which is conducive to the subsequent stable rotation of the handle 5. In summary, the ball valve is easy to replace the handle and the sealing ring.

Claims

1. A leak-proof straight pipe flange ball valve, characterized by: The invention comprises a valve stem (10) and a positioning cover (9), wherein the valve stem (10) is arranged in the middle of the positioning cover (9), a mounting sleeve (17) is arranged on the outside of the upper end of the valve stem (10), and a handle (5) is fixed on one side of the mounting sleeve (17), a connecting rod (6) is fixed on the upper end of the valve stem (10), and a nut (7) is threadedly engaged with the connecting rod (6), slots (19) are arranged on both sides of the front end of the valve stem (10), a rod seat (18) is arranged in the mounting sleeve (17), and both ends of the rod seat (18) are slidably connected to the slot (19), threaded columns (22) are arranged on both sides of the rear end of the rod seat (18), and the outer wall of the threaded column (22) is threadedly engaged with a limiting sleeve (23).

2. The anti-leakage straight pipe flange ball valve according to claim 1, characterized in that: A protective cover (8) is provided on the outside of the connecting rod (6), and a clearance groove (15) is provided on one side of the protective cover (8) corresponding to the handle (5).

3. The anti-leakage straight pipe flange ball valve according to claim 1, characterized in that: A support plate (16) is provided at the lower end of the mounting sleeve (17), and guide blocks (20) are provided on both sides of the lower end of the support plate (16).

4. The anti-leakage straight pipe flange ball valve according to claim 1, characterized in that: An annular guide rail (14) is provided in the middle of the upper end of the positioning cover (9), and the annular guide rail (14) is slidably connected to the guide block (20).

5. The anti-leakage straight pipe flange ball valve according to claim 4, characterized in that: A clamping ring (13) is provided at the upper end of the interior of the positioning cover (9), and a water-expandable rubber ring (12) is provided at the lower end of the clamping ring (13).

6. The anti-leakage straight pipe flange ball valve according to claim 5, characterized in that: A valve body (2) is provided at the lower end of the positioning cover (9), and a sphere (1) is provided in the middle of the valve body (2), and the upper end of the sphere (1) is fixedly connected to the lower end of the valve stem (10).

7. The anti-leakage straight pipe flange ball valve according to claim 6, characterized in that: A sealing ring (11) is provided inside the upper end of the valve body (2), and a gasket (4) is provided on the edge of the upper end of the valve body (2).

8. The anti-leakage straight pipe flange ball valve according to claim 6, characterized in that: A flange (21) is provided at the edge of the lower end of the positioning cover (9), and bolts (3) are equidistantly threaded on the flange (21), and the lower ends of the bolts (3) are threadedly engaged with the upper end of the valve body (2).

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