CN214662201U - Novel hard sealing semi-ball valve capable of compensating sealing specific pressure - Google Patents

Abstract

The utility model discloses a can compensate novel hard seal hemisphere valve of sealed specific pressure. A hemisphere (7) of the valve body is movably arranged at the inner end of the valve body (5) through a lower valve rod (6) and an upper valve rod (9) and seals a through hole of the valve body (5), the upper end of the lower valve rod (6) is movably connected with the hemisphere (7), the lower end of the lower valve rod is fixed at the middle part in a lower eccentric shaft sleeve (1), a lower flange of a transmission support (16) is fixed on a flange in the valve body (5), the upper middle part of the upper valve rod (9) is arranged at the upper part of a flange shaft hole in the valve body through an upper eccentric shaft sleeve (11), a valve actuating mechanism (15) is fixedly connected with an upper flange of the transmission support (16), and the upper end part of the upper valve rod (9) is movably connected with a driving piece in the valve actuating mechanism (15). Because the utility model discloses a cooperation of going up eccentric cover eccentric magnitude is adjusted, can eliminate sealed vice wearing and tearing clearance, reaches reliable sealed specific pressure requirement, improve equipment maintenance and maintenance work efficiency, reduce maintenance personal's intensity of labour, guarantee the safe effective operation of valve and equipment.

Description

Novel hard sealing semi-ball valve capable of compensating sealing specific pressure

The technical field is as follows:

the utility model relates to a can compensate novel hard sealed hemisphere valve of sealed specific pressure that is used for different fields such as oil, chemical industry, electric power, metallurgy, building materials extensively.

Background art:

the ball valve product of marketing at present divides from the structure: a floating ball valve and a fixed ball valve are arranged; from the sealing material group: the ball valve is divided into a semi-sphere, a whole sphere and the like from the sphere. No matter which kind of ball valve structure, after the vice wearing and tearing of ball valve seal or became invalid, according to the live condition of becoming invalid, all change the vice valve seat or spheroid of including the valve body of ball valve, or directly change whole ball valve. Particularly, the hard sealing ball valve has a severe working environment, and when the sealing pair fails, the maintenance period is long; need dismantle whole platform valve from the pipeline, disintegrate to whole platform valve again, carry out the repair welding back to the valve body sealing face and the sealed face of spheroid of damage respectively, machining again, valve body and spheroid cooperation are ground to according with product technical requirement, through pressure test and inspection after the reassembling, accord with the product requirement and just can install again and use on former pipeline, this process is loaded down with trivial details, work load is big, maintenance cycle length and work efficiency are low, seriously influence the safe operation of equipment, when the valve is installed in important pipeline, cause certain economic loss for the enterprise when needing to shut down. Because the hard sealing semi-spherical valve sealing pair is metal hard sealing, the sealing surface can be abraded in the process of using for many years, and then medium leakage can be generated, and when the valve is under severe working conditions of high temperature, high pressure, harmful media and the like, the medium leakage of the valve can cause personal casualty accidents or equipment loss.

The utility model has the following contents:

the technical problem to be solved by the utility model is to provide a matching adjustment of the eccentric amount of the upper eccentric sleeve, which can conveniently complete the compensation adjustment of the micro-gap of the valve seal pair abrasion, eliminate the seal pair abrasion gap, and can complete the compensation adjustment without detaching the product from the pipeline, thereby realizing the close fit of the abrasion sealing surface, achieving the reliable sealing specific pressure requirement and ensuring the reliable sealing performance of the valve; the novel hard sealing semi-ball valve capable of compensating the sealing specific pressure can quickly improve the equipment maintenance and repair work efficiency, greatly reduce the work labor intensity of maintenance personnel and ensure the safe and effective operation of valves and equipment.

The utility model discloses a realize that the technical scheme that above-mentioned purpose adopted is: a semi-sphere of a novel hard sealing semi-sphere valve capable of compensating sealing specific pressure is movably arranged at the inner end of a valve body through a lower valve rod and an upper valve rod and seals a through hole of the valve body, the upper end of the lower valve rod is movably connected with a lower shaft hole of the semi-sphere through a lower bearing sleeve, the lower end of the lower valve rod is fixed at the middle part in a lower eccentric shaft sleeve, a lower flange of a transmission support is fixed on a flange in the valve body and is connected with a first nut through a first stud, a packing gland is connected with an upper eccentric shaft sleeve through a first stud and a first nut, the lower middle part of the upper valve rod is movably arranged in the upper shaft hole of the valve body through an upper bearing sleeve, the upper middle part of the upper valve rod is arranged at the upper part of the shaft hole of a flange in the valve body through the upper eccentric shaft sleeve, packing is filled at the upper end of the upper eccentric shaft sleeve, the packing gland compresses the packing through the first stud and the first nut to prevent leakage, a valve actuating mechanism is fixedly connected with the upper flange of the transmission support through a second stud and a second nut, the upper end part of the upper valve rod is movably connected with a driving piece inside the valve actuating mechanism.

The utility model has the advantages that: because the sealing pair is made of alloy steel and hard alloy, the sealing surface of the ball body can also be subjected to special surface hardening treatment, and the ball body sealing surface has the characteristics of high temperature resistance, high pressure resistance, wear resistance, strong corrosivity and the like, can be suitable for severe working condition environments, and meets the use requirements of customers under different working conditions. The valve sealing pair can be conveniently compensated and adjusted by adopting the matching adjustment of the eccentric amount of the upper eccentric sleeve, the abrasion gap of the sealing pair is eliminated, the product can be completed without detaching the product from a pipeline, the abrasion sealing surface is tightly matched, the reliable sealing specific pressure requirement is met, and the reliable sealing performance of the valve is ensured. The maintenance efficiency of the equipment can be rapidly improved, the labor intensity of maintenance personnel is greatly reduced, and the safe and effective operation of the valve and the equipment is ensured. Adopt splined connection, replace traditional valve rod and spheroid to adopt the structure of flat key connection, the valve rod is connected the transmission moment of torsion with the spheroid and is stable, realizes the function of opening and close of novel hard seal hemisphere valve, reaches the mediation and cuts the effect of medium. The pressure test is carried out according to the GB/T13927-2008 industrial valve pressure test standard, under the condition that the specified test pressure and the duration time of the holding test pressure are required, the leakage rate of the sealing test reaches grade B, is strictly higher than grade D required by the standard and is higher than three grades required by the standard, and the sealing test device is reasonable in design, convenient to install, energy-saving and environment-friendly, prolongs the service life, and greatly improves the quality and the utilization rate.

Description of the drawings:

fig. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a view from a-a of fig. 1.

Fig. 3 is a view from B-B of fig. 1.

The specific implementation mode is as follows:

example 1: as shown in figures 1, 2 and 3, a hemisphere 7 of a novel hard sealing hemisphere valve capable of compensating sealing specific pressure is movably arranged at the inner end of a valve body 5 through a lower valve rod 6 and an upper valve rod 9 and seals a through hole of the valve body 5, the upper end of the lower valve rod 6 is movably connected with a lower shaft hole of the hemisphere 7 through a lower bearing sleeve 8, the lower end is fixed at the middle part in a lower eccentric shaft sleeve 1, a lower flange of a transmission support 16 is fixed on a flange in the valve body 5 and is connected with a first nut 18 through a first stud 17, a packing gland 21 is connected with an upper eccentric shaft sleeve 11 through the first stud 17 and the first nut 18, the lower end of the upper valve rod 9 is connected with an upper shaft hole of the hemisphere 7 through a spline 22, the lower middle part of the upper valve rod 9 is movably arranged in the upper shaft hole of the valve body 5 through the upper bearing sleeve 10, the upper middle part of the upper valve rod 9 is arranged at the upper part of the shaft hole of the flange in the valve body through the upper eccentric shaft sleeve 11, a packing 3 is filled at the upper end of the upper eccentric shaft sleeve 11, the packing gland 21 compresses the packing 3 to prevent leakage through the first stud 17 and the first nut 18, the valve actuating mechanism 15 is fixedly connected with the upper flange of the transmission support 16 through the second stud 19 and the second nut 20, and the upper end part of the upper valve rod 9 is movably connected with a driving piece in the valve actuating mechanism 15.

Example 2: as shown in figures 1, 2 and 3, a lower eccentric shaft sleeve 1 of the novel hard sealing hemispherical valve capable of compensating the sealing specific pressure is fixed in a lower shaft hole of a valve body 5 by a first inner hexagonal screw 2, and a sealing ring 4 is movably arranged at the outer circle part of the lower eccentric shaft sleeve 1 at equal intervals and is in sealing connection with the lower shaft hole of the valve body 5.

Example 3: as shown in fig. 1, fig. 2 and fig. 3, an upper eccentric shaft sleeve 11 of the novel hard sealing hemispherical valve capable of compensating the sealing specific pressure is fixed by a second inner hexagonal screw 14, an outer sealing ring 12 is arranged at an outer circle part of the upper eccentric shaft sleeve 11 and is in sealing connection with an upper shaft hole of a flange in the valve body 5, and an inner sealing ring 13 is arranged inside the upper eccentric shaft sleeve 11 and is in sealing connection with an upper middle part of the upper valve stem 9.

Example 4: the utility model discloses a theory of operation is:

the valve body is mainly driven by a valve actuating mechanism, a hand wheel of the actuating mechanism drives a worm, the worm drives a worm wheel, the worm wheel drives an upper valve rod to rotate, the upper end of the upper valve rod is matched with a spline hole of the worm wheel in the valve actuating mechanism in a spline shaft mode, the worm wheel rotates 90 degrees clockwise to close the valve, and the worm wheel rotates 90 degrees anticlockwise to open the valve. The actuating mechanism utilizes the upper valve rod to drive the hemisphere to rotate through the upper eccentric shaft sleeve and the lower valve rod through the lower eccentric shaft sleeve, thereby realizing the opening and closing functions of the valve body and achieving the purposes of dredging and cutting off the medium.

Example 5: the utility model discloses an operating procedure is:

firstly when sealing pair adjustment is carried out to novel hard seal hemisphere valve, need close this valve upper and lower reaches, and open the relief valve around this valve, with this valve and its upper and lower reaches and medium pressure in the pipeline discharge to accord with safe work requirement can implement to guarantee maintenance personal's personal safety. Then the nut, the transmission support and the valve actuating mechanism are disassembled integrally in sequence, and then the gland nut is disassembled; sequentially unscrewing the four cylindrical-head socket head cap screws of the upper eccentric shaft sleeve and the lower eccentric shaft sleeve, detaching two socket head cap screws at any opposite angle, and reserving the other two socket head cap screws for use after unscrewing; then two-dimensional maintenance personnel are mutually matched, a special spanner is inserted into the waist-shaped hole of the cylindrical head hexagon socket screw with the upper eccentric shaft sleeve and the lower eccentric shaft sleeve taken out, the upper eccentric shaft sleeve and the lower eccentric shaft sleeve are respectively rotated clockwise and anticlockwise to slightly rotate until the hemisphere sealing surface is contacted with the valve body valve seat sealing surface and a certain sealing specific pressure is formed, the pretightening force applied on the spanner operated by the maintenance personnel is temporarily not loosened, at the moment, the two cylindrical head hexagon screws in the waist-shaped hole which are loosened but not disassembled are screwed down to the technical requirement by using a torque spanner, and the other two cylindrical head hexagon screws of the upper eccentric shaft sleeve and the lower eccentric shaft sleeve are screwed down to meet the technical requirement according to the steps; sequentially screwing a packing gland nut to the technical requirement by using a torque wrench; and integrally mounting the transmission support and the valve actuating mechanism to the technical requirements according to the disassembly sequence.

The above description is only for the preferred embodiment of the present invention, but the scope of the present invention is not limited thereto, and any changes or substitutions that can be easily conceived by those skilled in the art within the technical scope of the present invention should be covered by the present invention.

Claims (3)

1. The utility model provides a can compensate novel sealed hemisphere valve firmly of sealed specific pressure which characterized by: the hemisphere (7) is movably arranged at the inner end of the valve body (5) through the lower valve rod (6) and the upper valve rod (9) and seals a through hole of the valve body (5), the upper end of the lower valve rod (6) is movably connected with a lower shaft hole of the hemisphere (7) through the lower bearing sleeve (8), the lower end of the lower valve rod is fixed at the middle part in the lower eccentric shaft sleeve (1), a lower flange of a transmission support (16) is fixed on a middle flange of the valve body (5) and is connected with a first nut (18) through a first stud (17), a packing gland (21) is connected with an upper eccentric shaft sleeve (11) through the first stud (17) and the first nut (18), the lower end of the upper valve rod (9) is connected with an upper shaft hole of the hemisphere (7) through a spline (22), the lower middle part of the upper valve rod (9) is movably arranged in the upper shaft hole of the valve body (5) through the upper bearing sleeve (10), the upper middle part of the upper valve rod (9) is arranged at the upper shaft hole of the middle flange in the valve body through the upper eccentric shaft sleeve (11), the packing (3) is filled at the upper end of the upper eccentric shaft sleeve (11), the packing gland (21) compresses the packing (3) to prevent leakage through a first stud (17) and a first nut (18), the valve actuating mechanism (15) is fixedly connected with an upper flange of the transmission support (16) through a second stud (19) and a second nut (20), and the upper end part of the upper valve rod (9) is movably connected with a driving piece in the valve actuating mechanism (15).

2. The novel hard sealing hemispherical valve capable of compensating the specific sealing pressure as claimed in claim 1, wherein: lower eccentric axle sleeve (1) fix in the axle hole under valve body (5) with first hexagon socket head cap screw (2), sealing washer (4) activity equidistance sets up eccentric axle sleeve (1) excircle position under, and forms sealing connection with in the axle hole under valve body (5).

3. The novel hard sealing hemispherical valve capable of compensating the specific sealing pressure as claimed in claim 2, wherein: go up eccentric sleeve (11) fixed with second hexagon socket head cap screw (14), outer sealing washer (12) set up at last eccentric sleeve (11) excircle position, and with valve body (5) in the flange shaft hole sealing connection, interior sealing washer (13) set up in last eccentric sleeve (11), and with last valve stem (9) upper middle part sealing connection.

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