Ball valve with valve rod convenient to replace

Abstract

The utility model discloses a ball valve with a valve rod convenient to replace, which comprises a shell, a fixed table arranged at the top of the shell, bosses symmetrically arranged at the top of the fixed table, a valve body installed inside the shell, a rotating shaft arranged at the bottom of the valve body, a butt joint transverse groove arranged on the upper surface of the rotating shaft, and a valve rod main body penetrating through the surface of the fixed table. A mounting hole is formed in the inner side of the boss, a wedge-shaped block is slidably mounted in the mounting hole, one end of the wedge-shaped block is connected with a pulling plate through a sliding rod, the sliding rod is sleeved with a spring, and a limiting ring is arranged on the outer side of the boss; a limiting plate and a limiting bolt are arranged on the limiting ring; the valve rod can be quickly replaced under the condition that the whole structure of the ball valve is not disassembled, valve rod loosening caused by vibration is avoided, replacement convenience and safety are improved, meanwhile, dust and impurities are effectively prevented from invading through the protective sliding plate structure, the sealing reliability of the device is improved, and the service life of the device is prolonged.

Description

TECHNICAL FIELD

[0001] The utility model belongs to the technical field of ball valve, concretely relates to a ball valve convenient for replacing valve rod. BACKGROUND

[0002] As a commonly used fluid control element, the ball valve is widely used in petroleum, chemical industry, water supply, heating and other industries. The traditional ball valve is usually connected with the valve body through the valve rod, and the rotation of the valve rod drives the valve body to rotate, thereby realizing the fluid on-off control. In the prior art, the valve rod is usually fixed with the valve body through threaded connection, pin connection or other ways, and the overall structure is relatively compact, which can meet the daily use demand. However, in the actual application process, due to the long-term stress state or environmental corrosion of the valve rod, damage, jamming, sealing failure and other problems may occur, and then the valve rod needs to be replaced in time to ensure the normal operation of the ball valve.

[0003] When replacing the valve rod of the existing ball valve, the upper valve or the whole ball valve assembly usually needs to be disassembled, and even the valve needs to be removed from the pipeline, which is complicated and time-consuming, increases the maintenance cost, and may cause the pipeline system to be shut down for a long time, affecting normal use. In addition, during the replacement process, the internal sealing structure of the valve cannot effectively isolate the dust and impurities from the outside, which may cause the sealing performance of the replaced valve to decrease, thereby affecting the service life and reliability of the ball valve. UTILITY MODEL CONTENTS

[0004] In view of the problems existing in the prior art, the purpose of the utility model is to provide a ball valve convenient for replacing the valve rod, which can quickly replace the valve rod without disassembling the overall structure of the ball valve, and ensure the sealing performance and reliability of the internal structure during the replacement process.

[0005] To achieve the above purpose, the utility model provides the following technical scheme: a ball valve convenient for replacing the valve rod, comprising a shell, the shell is spliced, a fixed table is arranged at the top of the shell, a boss is symmetrically arranged at the top of the fixed table, a valve body is installed in the shell, a rotating shaft is arranged at the bottom of the valve body, the rotating shaft rotates below the shell, a butt joint horizontal groove is formed in the upper surface of the rotating shaft;

[0006] A valve rod body vertically slides through the surface of the fixed table, a butt joint block is arranged at the bottom of the valve rod body, and the size of the butt joint block is matched with the size of the butt joint horizontal groove;

[0007] A conical boss is arranged on the surface of the valve rod body, the conical boss has a conical structure with a large upper part and a small lower part, and the valve rod body is fixed by limiting the conical boss.

[0008] Further, the conical protrusion is arranged between two bosses, the inner side of the boss is provided with a mounting hole, a wedge block is slidably arranged in the mounting hole, and the two wedge blocks limit the conical protrusion.

[0009] Further, one end of the two wedge blocks away from each other is provided with a slide rod, the end of the slide rod is provided with a pull plate, the pull plate is arranged on the outer side of the boss, a pull ring is fixed on the outer side of the pull plate, a spring is sleeved on the surface of the slide rod, the spring is arranged in the mounting hole, and one end of the spring is in contact with the end face of the wedge block.

[0010] Further, the outer side of the two bosses is rotatably provided with a limiting ring, the limiting ring is arranged below the mounting hole, the upper surface of the limiting ring is symmetrically provided with a limiting plate, the limiting plate corresponds to the lower half of the outer surface of the pull plate, the surface of the limiting ring is screwed with a locking bolt, and the limiting ring is fixed through the screwing of the locking bolt.

[0011] Further, the two bosses are symmetrically and slidably provided with protective sliding plates, the two protective sliding plates cover the cavities between the two bosses, the side of the two protective sliding plates close to each other is provided with a C-shaped groove, and the two C-shaped grooves are combined into a circular through hole matched with the valve rod body.

[0012] Further, the upper surface of the limiting ring is also symmetrically provided with a limiting bolt, and the limiting bolt limits the two protective sliding plates.

[0013] Further, the top of the valve rod body is provided with a handle through bolts.

[0014] Compared with the prior art, the beneficial effects of the utility model are:

[0015] The utility model discloses a fixed platform is set up on the top of the casing, and the boss is symmetrically arranged on the fixed platform, the valve body and the rotating shaft are installed inside, the butt joint horizontal groove is arranged on the rotating shaft, and the butt joint block of the valve rod body is matched, so that the quick plug-in and replacement of the valve rod can be realized without disassembling the casing and the valve body, the valve rod replacement operation steps are significantly simplified, the maintenance difficulty and operation time are reduced, and the problems of complicated valve rod replacement and the need to disassemble the whole ball valve in the prior art are solved.

[0016] The utility model discloses a conical protrusion is arranged on the surface of the valve rod body, the mounting hole arranged on the inner side of the boss and the wedge block slidably arranged in the mounting hole are utilized, the spring thrust is matched to automatically limit the conical protrusion, when the valve rod is inserted in place, the wedge block holds the conical protrusion above under the action of the spring force, effectively prevents the axial looseness of the valve rod body due to vibration or medium impact, improves the connection stability and reliability of the whole device, and solves the problem that the valve rod replacement leads to failure due to insecure fixation in the prior art.

[0017] The utility model discloses a draw plate, slide bar and pull ring are set up, cooperate with the structure of limiting ring and limiting plate, can control wedge block to move out in the replacement process, release conical lug, thereby realize the convenient plug of valve stem main body, through the rotation limiting ring and lock locking bolt after installation in place, realize the reliable limiting of draw plate, prevent wedge block from moving abnormally because of external vibration, improve the operation convenience and the security of device in the replacement process, solve the inconvenient dismounting and accidental falling problem of traditional structure because of the imperfect limiting structure.

[0018] The utility model discloses a draw plate, slide bar and pull ring are set up, cooperate with the structure of limiting ring and limiting plate, can control wedge block to move out in the replacement process, release conical lug, thereby realize the convenient plug of valve stem main body, through the rotation limiting ring and lock locking bolt after installation in place, realize the reliable limiting of draw plate, prevent wedge block from moving abnormally because of external vibration, improve the operation convenience and the security of device in the replacement process, solve the inconvenient dismounting and accidental falling problem of traditional structure because of the imperfect limiting structure. BRIEF DESCRIPTION OF DRAWINGS

[0019] Figure 1 It is the three -dimensional structure schematic diagram of the utility model;

[0020] Figure 2 It is the sectional structure schematic diagram of the utility model;

[0021] Figure 3 It is the structure schematic diagram of valve body and valve stem of the utility model;

[0022] Figure 4 It is the explosion structure schematic diagram of the utility model Figure 3 ;

[0023] Figure 5 It is the sectional structure schematic diagram of the utility model Figure 3 ;

[0024] Figure 6 It is the limiting ring three -dimensional structure schematic diagram of the utility model;

[0025] Figure 7 It is the valve stem three -dimensional structure schematic diagram of the utility model.

[0026] In the drawings, the component list that each sign represents is as follows: 1, valve body;11, fixed platform;12, boss;13, mounting hole;2, valve body;21, rotating shaft;22, butt joint horizontal groove;3, valve stem main body;31, butt joint block;32, conical lug;33, handle;4, wedge block;41, slide bar;5, spring;6, limiting ring;61, limiting plate;62, limiting bolt;63, locking bolt;7, protection slide;71, C groove. DETAILED DESCRIPTION

[0027] In order to make the purpose and advantages of the utility model more clearly, the following will specifically describe the utility model with examples. It should be understood that the following text is only used to describe one or several specific embodiments of the utility model, and does not strictly limit the protection scope of the utility model specifically requested.

[0028] Reference Figures 1-7 As shown in figure, a ball valve convenient to replace valve stem, including shell 1, shell 1 is spliced by multi-section structure, shell 1 is composed of upper and lower shell and is fixed by bolt connection, shell 1 top is provided with fixed platform 11, fixed platform 11 is square structure and is integrally formed with shell 1 top or is fixedly connected by welding mode, fixed platform 11 top is provided with two rectangular column-shaped structure boss 12 symmetrically, two boss 12 are arranged at intervals and are consistent in height, for subsequent installation and cooperation of limiting component, shell 1 inside is provided with valve body 2, valve body 2 is spherical structure, valve body 2 bottom is provided with rotating shaft 21, rotating shaft 21 is rotatably supported in shell 1 inside below by bearing assembly, rotating shaft 21 upper surface is provided with butt joint horizontal groove 22, butt joint horizontal groove 22 is rectangular groove and depth is adapted to the size of butt joint block 31 of valve stem main body 3.

[0029] Reference Figures 1-7 As shown in figure, fixed platform 11 surface is vertically slidably penetrated by valve stem main body 3, valve stem main body 3 is made of metal material and adopts surface corrosion-resistant treatment, valve stem main body 3 bottom is provided with butt joint block 31, butt joint block 31 is rectangular block structure, the size of butt joint block 31 is accurately matched with the inside size of butt joint horizontal groove 22 opened on rotating shaft 21, force moment transmission is realized by butt joint to drive valve body 2 to rotate switch.

[0030] Reference Figures 1-7 As shown in figure, valve stem main body 3 surface is provided with conical lug 32, conical lug 32 is overall conical structure that is large at top and small at bottom, conical lug 32 is integrally formed along the axial direction of valve stem main body 3, conical lug 32 surface is smooth to extrude limiting piece in the process of insertion, conical lug 32 is axially fixed and limited to valve stem main body 3 by the action of upper limiting mechanism of conical lug 32, so as to avoid the loosening or displacement phenomenon of valve stem main body 3 in the working process.

[0031] Reference Figures 4-5 As shown in figure, conical lug 32 is arranged between two boss 12, two boss 12 inner side is provided with mounting hole 13, mounting hole 13 is cylindrical and inner wall is smooth, mounting hole 13 is used for embedding and installing limiting mechanism, wedge block 4 is slidably installed in the inner side of mounting hole 13, wedge block 4 is overall trapezoidal block structure, wedge block 4 outer surface cooperates with the sliding of mounting hole 13 inner wall, the inclined surface of wedge block 4 faces conical lug 32, two wedge blocks 4 are symmetrically arranged, and conical lug 32 is limited by moving towards each other.

[0032] As shown in Figures 4-5 As shown in, the two wedge-shaped blocks 4 are provided with slide rods 41 at the ends away from each other, the slide rods 41 are in the shape of cylindrical rods, one end of the slide rod 41 is fixedly connected with the wedge-shaped block 4, the other end of the slide rod 41 extends through the boss 12 to the outside of the boss 12, a pull plate 42 is arranged at the end of the slide rod 41, the pull plate 42 is in the shape of a plate and is fixedly connected with the slide rod 41 perpendicularly, the pull plate 42 is arranged parallel to the outer surface of the fixed table 11, a pull ring is fixed on the outer side of the pull plate 42, the pull ring is used to facilitate manual pulling of the pull plate 42 to realize movement of the wedge-shaped block 4, a spring 5 is sleeved on the surface of the slide rod 41, the spring 5 is in the shape of a helical compression spring, the spring 5 is arranged inside the mounting hole 13, one end of the spring 5 is in contact with the end face of the wedge-shaped block 4, and the other end of the spring 5 abuts against the inner wall of the mounting hole 13, the wedge-shaped block 4 is always kept in a state of being pushed inward by the elastic force of the spring 5 to limit the conical protrusion 32.

[0033] As shown in Figures 3-6 As shown in, the two bosses 12 are rotatably installed with limiting rings 6 on the outer sides, the limiting rings 6 are in the shape of rings and are sleeved on the outer periphery of the fixed table 11, the limiting rings 6 are rotatably connected with the outer periphery of the fixed table 11 through bearings, the limiting rings 6 are arranged below the mounting holes 13, limiting plates 61 are symmetrically arranged on the upper surface of the limiting ring 6, the limiting plates 61 are in the shape of short plates, the limiting plates 61 correspond to the lower half of the outer surface of the pull plate 42, the limiting plates 61 are used to limit and constrain the pull plate 42 in the axial direction, locking bolts 63 are screwed on the surface of the limiting ring 6, the locking bolts 63 penetrate through the limiting ring 6 and are threadedly connected and fixed on the fixed table 11, and the locking of the limiting ring 6 relative to the fixed table 11 is realized by screwing the locking bolts 63.

[0034] As shown in Figure 3 As shown in Figure 4 As shown in, protective sliding plates 7 are symmetrically and slidably installed between the two bosses 12, the protective sliding plates 7 are in the shape of rectangular plates, the protective sliding plates 7 are arranged symmetrically with respect to each other along the horizontal direction, the two protective sliding plates 7 cover the cavity between the two bosses 12, preventing dust or impurities from the outside from entering the ball valve to affect the sealing performance and service life, C-shaped grooves 71 are formed on the sides of the two protective sliding plates 7 close to each other, the two C-shaped grooves 71 are combined into a circular through hole matched with the outer diameter of the valve rod body 3, so that the protective function of the protective sliding plates 7 is ensured while allowing the valve rod body 3 to freely pass through and be axially operated.

[0035] As shown in Figure 1 As shown in Figure 3 As shown in Figure 6 As shown in, limiting pins 62 are also symmetrically arranged on the upper surface of the limiting ring 6, the limiting pins 62 are in the shape of cylindrical pins, the limiting pins 62 are located on the outer side of the limiting plate 61 and extend towards the protective sliding plate 7, the limiting pins 62 are inserted into the limiting holes formed on the protective sliding plate 7 to limit and fix the protective sliding plate 7, so as to further enhance the stability and sealing performance of the protective sliding plate 7.

[0036] Reference Figure 1 As shown in the figure, the top of the valve stem body 3 is provided with a handle 33 through bolt mounting, the handle 33 is T-shaped structure or cross structure, manual torque is applied to facilitate opening and closing operation, the handle 33 is fixed through the center bolt and the upper end of the valve stem body 3 is screwed, the top surface of the handle 33 is provided with anti-skid texture to increase the gripping friction, improve the stability and safety of operation.

[0037] The working principle of the utility model is: the inside of shell 1 is provided with cavity which is mutually adapted with valve body 2, and is sealed through sealing ring, so that valve body 2 can only rotate along the axis of rotating shaft 21 to realize opening and closing, the existence of spring 5 makes wedge block 4 have the force to the center direction, then wedge block 4 exceeds the inner wall of boss 12, when replacing valve stem body 3, valve stem body 3 can be inserted into fixed platform 11 from top to bottom and enter the inside of shell 1, taper boss 32 extrudes two wedge blocks 4 in the process of insertion, when the butt joint block 31 at the bottom of valve stem body 3 enters the inside of butt joint transverse groove 22, taper boss 32 moves down to the lower side of wedge block 4, at this time, the elastic force of spring 5 makes wedge block 4 move to the upper side of taper boss 32 to limit, after the cooperation of butt joint block 31 and butt joint transverse groove 22, valve stem body 3 can be controlled to rotate through rotating handle 33;

[0038] When installing valve stem body 3, first rotate limiting ring 6, so that limiting plate 61 is out of position with pull plate 42, so that pull plate 42 can move outward when taper boss 32 extrudes wedge block 4, at the same time, limiting bolt 62 is out of position with protective slide plate 7, so that two protective slide plates 7 are pulled outward, the distance between the two is increased, which is convenient for the installation of valve stem body 3, after installation, reverse rotate limiting ring 6 and fix through locking bolt 63, so that limiting plate 61 limits the lower half of pull plate 42, preventing wedge block 4 from moving outward due to vibration and other external factors, at the same time, limiting bolt 62 is placed in the protective slide plate 7 after butt joint, limiting, so as to seal the space between the two bosses 12 and prevent dust from entering.

[0039] Conversely, when valve stem body 3 needs to be disassembled, rotate so that limiting plate 61 is out of position with pull plate 42, at this time, pull pull plate 42 on the outside to make wedge block 4 move to the inside of mounting hole 13, no longer limit taper boss 32, at this time, valve stem body 3 can be directly pulled out.

[0040] The above is only the preferred embodiment of the utility model, it should be pointed out that for ordinary technical personnel in the technical field, without departing from the principle of the utility model, a number of improvements and refinements can be made, which should be regarded as the protection scope of the utility model. The structures, devices and operation methods not specifically described and explained in the utility model are implemented according to the conventional means in the field without special description and limitation.

Claims

1. A ball valve with a valve stem that is easy to replace, comprising a housing (1), characterized in that: The shell (1) is spliced, the shell (1) is provided with a fixed table (11) on the top, the fixed table (11) is provided with a boss (12) on the top, the shell (1) is provided with a valve body (2) inside, the valve body (2) is provided with a rotating shaft (21) on the bottom, the rotating shaft (21) rotates below the shell (1) inside, the upper surface of the rotating shaft (21) is provided with a butt joint horizontal groove (22). The surface of the fixed table (11) is vertically slid through a valve rod body (3), the bottom of the valve rod body (3) is provided with a butt joint block (31), the butt joint block (31) is matched with the inner size of the butt joint horizontal groove (22). The surface of the valve rod body (3) is provided with a tapered lug (32), the tapered lug (32) is a tapered structure with a large upper surface and a small lower surface, the tapered lug (32) is limited to fix the valve rod body (3).

2. A globe valve with a conveniently replaceable valve stem according to claim 1, characterized in that: The tapered lug (32) is arranged between the two bosses (12), the inner side of the boss (12) is provided with a mounting hole (13), the mounting hole (13) is slidably provided with a wedge block (4), the wedge blocks (4) on both sides limit the tapered lug (32).

3. A globe valve with a conveniently replaceable valve stem according to claim 2, characterized in that: The end of the wedge block (4) away from each other is provided with a slide rod (41), the end of the slide rod (41) is provided with a pull plate (42), the pull plate (42) is arranged outside the boss (12), the pull plate (42) is provided with a pull ring outside, the surface of the slide rod (41) is provided with a spring (5), the spring (5) is arranged inside the mounting hole (13), one end of the spring (5) is in contact with the end surface of the wedge block (4).

4. A valve according to claim 3 wherein: The outer side of the two bosses (12) is rotatably provided with a limiting ring (6), the limiting ring (6) is arranged below the mounting hole (13), the upper surface of the limiting ring (6) is symmetrically provided with a limiting plate (61), the limiting plate (61) corresponds to the lower half of the outer surface of the pull plate (42), the limiting ring (6) is screwed with a locking bolt (63), and the limiting ring (6) is fixed by screwing the locking bolt (63).

5. A globe valve with a conveniently replaceable valve stem according to claim 4, characterized in that: The two bosses (12) are symmetrically slidably provided with a protective slide plate (7), the two protective slide plates (7) cover the cavity between the two bosses (12), the side of the two protective slide plates (7) close to each other is provided with a C-shaped groove (71), and the two C-shaped grooves (71) are combined into a circular through hole matched with the valve rod body (3).

6. A globe valve with a conveniently replaceable valve stem according to claim 5, characterized in that: The upper surface of the limiting ring (6) is also symmetrically provided with a limiting bolt (62), and the limiting bolt (62) limits the two protective slide plates (7).

7. A globe valve with easy replacement of the valve stem according to claim 1, characterized in that: The top of the valve rod body (3) is provided with a handle (33) through bolts.

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