CN114738516A - A bellows ball valve - Google Patents

Abstract

The utility model belongs to the technical field of the ball valve and specifically relates to a bellows ball valve is related to, including last disk seat and lower disk seat, be provided with the valve rod in the cavity of going up the disk seat, the coaxial cover in the outside of valve rod is equipped with the bellows, be fixed with first annular slab on going up the cavity inner wall of disk seat, the outside of valve rod is fixed with the second annular slab, bellows one end welded fastening is on first annular slab, and other end welded fastening is on the second annular slab, the valve rod slides on first annular slab, the disk seat internal rotation is provided with the spheroid down, the upper end of going up the disk seat is provided with the driving piece of ordering about the vertical sliding of valve rod, be provided with between spheroid and the valve rod and order about spheroid pivoted guide assembly through the driving piece, through above-mentioned scheme, reduced the emergence of gas leakage accident.

Description

A bellows ball valve

technical field

The present application relates to the field of ball valves, in particular to a bellows ball valve.

Background technique

Valves have an extremely wide range of uses in industrial and agricultural production and daily life. For some valves used to transmit toxic gases, it is usually required that the valve stem has excellent sealing performance to prevent the leakage of effective substances.

Valves used to control the on-off of gas, usually manufacturers use more ball valves. By setting a driving mechanism at the top of the ball valve stem, the valve stem drives the ball to rotate 90 degrees, so as to realize that the valve stem of the valve is usually sealed with packing, which After the valve is used for a period of time, due to aging, problems such as dripping, leaking, and leaking are prone to occur at the valve stem. The leakage of traditional packing valves may lead to the leakage of some toxic and dangerous substances.

SUMMARY OF THE INVENTION

In order to reduce the leakage problem of the ball valve, the present application provides a bellows ball valve.

A bellows ball valve provided by the application adopts the following technical solutions:

A bellows ball valve comprises an upper valve seat and a lower valve seat, a valve stem is arranged in the cavity of the upper valve seat, a bellows is sleeved coaxially on the outer side of the valve stem, and the hollow of the upper valve seat is provided with a bellows. A first annular plate is fixed on the inner wall of the cavity, a second annular plate is fixed on the outer side of the valve stem, one end of the bellows is welded and fixed on the first annular plate, and the other end is welded and fixed on the second annular plate. The valve stem slides on the first annular plate, the lower valve seat is rotatably provided with a ball, the upper end of the upper valve seat is provided with a driving member that drives the valve stem to slide vertically, and the space between the ball and the valve stem is A guide assembly is provided which drives the ball to rotate through the driving member.

By adopting the above technical solution, the bellows seals the sliding gap between the valve stem and the upper valve seat, so that it is difficult for the outside gas to leak from the gap, and the occurrence of leakage accidents is reduced. The valve stem slides vertically and the bellows shrinks. Under the action of the guide assembly, the entire sphere rotates, so as to control the flow on and off in the pipeline.

Optionally, the guide assembly includes a shaft sleeve rotatably connected to the side wall of the inner cavity of the lower valve seat, a pin shaft fixed on the side wall of the inner cavity of the shaft sleeve, and the lower end of the valve rod is located in the inner cavity of the shaft sleeve, A guide groove is formed on the side wall of the valve stem, the guide groove is spirally arranged along the axial direction of the valve stem, and the pin shaft slides in the guide groove.

By adopting the above technical solution, in the process of driving the valve stem to move vertically, the pin shaft slides in the guide groove. Since the guide groove is arranged in a spiral, the entire shaft sleeve is synchronized with the ball during the vertical slide of the valve stem. Rotation, the control of the flow on and off is realized during the rotation of the sphere.

Optionally, the outer side of the pin shaft is provided with a first ring groove, the inner cavity of the first ring groove is provided with a ball bearing, and the inner ring of the ball bearing is fixedly connected with the inner wall of the first ring groove, so The outer ring of the ball bearing is in contact with the inner wall of the guide groove.

By adopting the above technical solution, the ball bearing reduces the frictional force between the pin shaft and the inner wall of the guide groove, and improves the stability of the pin shaft sliding in the guide groove.

Optionally, a number of positioning holes are opened on the inner wall of the guide groove, the inner wall of the positioning hole is in the shape of an arc, the positioning hole is a wave trough, and an arc-shaped wave crest is formed between two adjacent wave troughs, The pin shaft is provided with a clamping piece that drives the sphere to rotate at a certain angle.

By adopting the above technical solution, in the process of driving the valve stem to move vertically, under the action of the clip, each time the sphere is rotated by a certain angle, so that the clip moves from one valley to another and hits the inner wall of the valley. The sound of the impact is convenient for the staff to judge how many degrees the sphere has been rotated, so as to control the flow value passing through the sphere in real time.

Optionally, the snap-connector includes an installation sleeve fixed on the pin shaft, a spring fixed in the installation sleeve, and a billiard ball fixed on the free end of the spring, the end of the pin shaft is provided with an installation groove, the The installation sleeve is embedded and fixed in the installation groove.

By adopting the above technical solution, in the process of driving the valve stem to expand and contract, under the action of the guide groove, each time the ball is rotated by a certain angle, the billiard ball hits the inner wall of the wave valley once, so that the staff can control the value of the gas passing flow.

Optionally, the billiard ball is hollow, and metal sand is installed in the inner cavity of the billiard ball.

By adopting the above technical solution, whenever the valve stem is driven to slide vertically by the driving member, every time the pin shaft enters a positioning hole, the billiard ball hits the inner wall of the wave valley once, and the metal sand hits the inner wall of the billiard ball in the billiard ball. And make a sound, when manually adjusting the telescopic height of the valve stem, the staff can control the flow of gas through the sound.

Optionally, the driving member is a cylinder, and the piston rod of the cylinder is detachably connected to the upper end of the valve rod.

By adopting the above technical solution, the solenoid valve is controlled by an external PLC, so that the piston rod of the cylinder slides vertically, thereby driving the valve rod to move vertically, so as to realize the regulation of the on-off of the pipeline.

Optionally, a second annular groove is formed on the inner cavity side wall of the upper valve body, the first annular plate is installed in the second annular groove, and sealing gaskets are fixed on both sides of the first annular plate sheet, the sealing gasket fits the inner wall of the second ring groove.

By adopting the above technical solution, the sealing gasket increases the sealing performance at the portion of the first annular plate, making it more difficult for gas to leak from the portion of the first annular plate.

To sum up, the present application includes at least one of the following beneficial technical effects:

1. Through the setting of bellows, the occurrence of gas leakage accidents is reduced.

2. Through the arrangement of the shaft sleeve, the guide groove and the pin shaft, the problem that the ball cannot be rotated due to the slippage of the valve stem is solved. Through this structure, the sealing performance of the ball is further improved.

Description of drawings

FIG. 1 is a schematic diagram of the overall structure of this embodiment.

FIG. 2 is an exploded view of the overall structure of the clip in this embodiment.

FIG. 3 is a schematic diagram of the position of the guide groove in this embodiment.

Reference numerals: 1, upper valve seat; 2, lower valve seat; 3, valve stem; 4, bellows; 5, first annular plate; 6, second annular plate; 7, sphere; 8, driving part; 9 , guide assembly; 10, bushing; 11, pin shaft; 12, guide groove; 13, first ring groove; 14, ball bearing; 15, positioning hole; 16, snap fitting; 17, installation sleeve; 18, spring ; 19, billiards; 20, the second ring groove; 21, gasket.

Detailed ways

The present application will be further described in detail below in conjunction with accompanying drawings 1-3.

The embodiment of the present application discloses a bellows 4 ball valve.

1, a bellows 4 ball valve includes an upper valve seat 1 and a lower valve seat 2, the upper valve seat 1 and the lower valve seat 2 are fixedly connected by bolts, and a valve stem 3 slides in the upper valve seat 1, The inner cavity of the lower valve seat 2 is rotatably connected with a ball 7. It is known that a passage for gas to pass through is opened on the ball 7, the valve stem 3 moves along the direction perpendicular to the flow of gas, and an actuating valve is arranged on the upper end of the upper valve seat 1. The driving member 8 for sliding the rod 3 is provided with a guide assembly 9 between the ball 7 and the valve stem 3 , which drives the ball 7 to rotate through the driving member 8 .

Referring to Figure 1, since the use environment is a toxic gas environment, there are strict requirements for the sealing performance of the entire ball valve. In order to prevent gas leakage, a bellows 4 is arranged in the inner cavity of the upper valve seat 1, and the inner cavity side of the upper valve body is A second annular groove 20 is formed on the wall, a first annular plate 5 is fixed in the second annular groove 20, the valve stem 3 is coaxially arranged in the inner cavity of the first annular plate 5, and the valve stem 3 and the first annular plate 5 Slip connection.

Referring to FIG. 1 , sealing gaskets 21 are fixed on both sides of the first annular plate 5 , so that the bellows 4 is coaxially sleeved on the outside of the valve stem 3 , so that the upper end of the bellows 4 is connected to the first annular plate 5 Welding fixed connection between. The sealing gasket 21 further increases the tightness at the location of the first annular plate 5 .

Referring to FIG. 1 , a second annular plate 6 is coaxially fixed on the outer side of the valve stem 3 , one end of the bellows 4 is welded and fixed on the side of the first annular plate 5 facing the second annular plate 6 , and the other end is welded and fixed on the second annular plate 6 on the side wall. The bellows 4 blocks the sliding gap of the valve stem 3 , so that it is difficult for the gas circulating from the lower valve seat 2 to flow out along the inner cavity channels of the lower valve seat 2 and the upper valve seat 1 .

1, the driving member 8 of the valve stem 3 can be a way of rotating the hand wheel, under the action of gears and racks to realize the up and down movement of the valve rod 3, the driving member 8 of the valve rod 3 can also be a cylinder or an electric cylinder For pushing the cylinder, the driving member 8 of the valve rod 3 is optimally set as a four-kilogram cylinder, the cylinder is fixed on the upper end of the upper valve seat 1, and the piston rod of the cylinder is fixedly connected with the upper end of the valve rod 3 through a coupling.

1 , the guide assembly 9 includes a shaft sleeve 10 and a pin shaft 11 , the shaft sleeve 10 is rotatably connected to the inner wall of the lower valve seat 2 , the shaft sleeve 10 and the ball 7 are fixedly connected by bolts, and the pin shaft 11 is fixed on the shaft sleeve 10 on the inner wall. The lower end of the valve stem 3 protrudes into the inner cavity of the shaft sleeve 10. In order to drive the valve stem 3 to slide vertically, so that the band-pass shaft sleeve 10 rotates, a guide groove 12 is opened on the outside of the valve stem 3, and the guide groove 12 runs along the valve. The length direction of the rod 3 is spirally arranged, and the pin shaft 11 slides in the guide groove 12. When the end of the valve rod 3 close to the ball 7 is at the lowest position of the lower valve seat 2, the pin shaft 11 is located in the guide groove 12 away from the ball. At one end of 7, the flow of gas at sphere 7 is at its maximum. Otherwise, the gas flow at the sphere 7 is zero.

Referring to FIG. 1 , when the gas needs to be circulated, the piston rod of the cylinder is extended toward the direction close to the sphere 7 through the external air source, so that the pin 11 is located at the end of the guide groove 12 away from the sphere 7, and the gas flow is at the maximum. , when the piston rod of the cylinder is retracted, pull the valve rod 3, so that the end of the valve rod 3 away from the cylinder moves away from the ball 7, so that the pin 11 gradually slides into the guide groove 12. One end of the ball 7, until the entire The shaft sleeve 10 rotates ninety degrees, and the gas flow is zero at this time.

2 and 3 , the outer wall of the pin shaft 11 is provided with a first ring groove 13 , the inner cavity side wall of the first ring groove 13 is provided with a ball bearing 14 , and the inner ring side wall of the ball bearing 14 is connected to the first ring groove 14 . The inner walls of the grooves 13 are fixedly connected. The side wall of the outer ring of the ball bearing 14 is in contact with the side wall of the inner cavity of the guide groove 12, so that when the pin shaft 11 is driven to slide in the guide groove 12, the outer ring of the ball bearing 14 rotates, thereby reducing the contact between the pin shaft 11 and the guide groove 12. The frictional force between the guide grooves 12 is more convenient for the pin shaft 11 to slide in the guide groove 12 .

Referring to FIG. 3 , in order to facilitate the control of the flow rate of the gas passing through, a number of positioning holes 15 are provided on the inner wall of the guide groove 12. The inner wall of the hole 15 is arc-shaped, and the inner wall of the positioning hole 15 is set as a wave trough, and an arc-shaped wave crest is formed between two adjacent wave troughs, so that the inner wall of the guide groove 12 forms a smooth wave-shaped curved surface.

1 and 3, the pin shaft 11 is also provided with a clip 16, the clip 16 includes a mounting sleeve 17, a spring 18 and a billiard ball 19, and one end of the pin shaft 11 facing the guide groove 12 is provided with a mounting groove, and the mounting sleeve 17 is fixed in the installation groove, the inner diameter of the opening of the installation sleeve 17 is equal to the diameter of the billiard ball 19, the spring 18 is located in the inner cavity of the installation sleeve 17, one end of the spring 18 is fixed on the inner wall of the installation sleeve 17, and the other end is fixed on the billiard ball 19. On the outside, the inner cavity of the billiard ball 19 is hollow, and the inner cavity of the billiard ball 19 is equipped with metal sand. In a wave valley, the billiard ball 19 hits the inner wall of the wave valley once, so that the metal sand makes a huge sound, and the staff can judge the size of the passing flow through the sound.

The implementation principle of a bellows 4 ball valve in the embodiment of the present application is as follows: when the gas is driven through the passage of the ball 7, the air is supplied to the cylinder through the external air source, so that the piston rod of the cylinder extends until the valve rod 3 is far away from the cylinder. One end is located at the lowest position of the lower valve seat 2, and the gas flow rate is the largest at this time. On the contrary, pull the valve stem 3 in the opposite direction, so that the pin shaft 11 slides from the end of the guide groove 12 away from the ball 7 to the other end, so that the ball 7 is turned over nine times. Ten degrees, so that the passing flow of the gas is zero. During the entire movement of the valve stem 3, under the action of the bellows 4, it is difficult for the circulating gas to leak.

The above are all preferred embodiments of the present application, and are not intended to limit the protection scope of the present application. Therefore: all equivalent changes made according to the structure, shape and principle of the present application should be covered within the scope of the present application. Inside.

Claims (8)

1. A bellows (4) ball valve characterized in that: comprises an upper valve seat (1) and a lower valve seat (2), a valve rod (3) is arranged in a cavity of the upper valve seat (1), the outer side of the valve rod (3) is provided with a corrugated pipe (4) in the same shaft sleeve (10), a first annular plate (5) is fixed on the inner wall of the cavity of the upper valve seat (1), a second annular plate (6) is fixed on the outer side of the valve rod (3), one end of the corrugated pipe (4) is welded and fixed on the first annular plate (5), the other end is welded and fixed on the second annular plate (6), the valve rod (3) slides on the first annular plate (5), the lower valve seat (2) is rotatably provided with a ball body (7), the upper end of the upper valve seat (1) is provided with a driving piece (8) which drives the valve rod (3) to vertically slide, a guide assembly (9) which drives the ball body (7) to rotate through a driving piece (8) is arranged between the ball body (7) and the valve rod (3).

2. A bellows (4) ball valve according to claim 1, characterized in that: guide assembly (9) are including rotating shaft sleeve (10) of connecting on disk seat (2) cavity lateral wall down, fix round pin axle (11) on shaft sleeve (10) cavity lateral wall, the lower extreme of valve rod (3) is located the inner chamber of shaft sleeve (10), guide way (12) have been seted up on the lateral wall of valve rod (3), guide way (12) are spiral setting along the axial of valve rod (3), round pin axle (11) slide in guide way (12).

3. A bellows (4) ball valve according to claim 2, characterized in that: first annular (13) have been seted up in the outside of round pin axle (11), be provided with ball bearing (14) in the inner chamber of first annular (13), the inner circle of ball bearing (14) and the inner wall fixed connection of first annular (13), the outer lane of ball bearing (14) contacts with the inner wall of guide way (12).

4. A bellows (4) ball valve according to claim 2, characterized in that: seted up a plurality of locating hole (15) on the inner wall of guide way (12), the inner wall of locating hole (15) is circular-arcly, locating hole (15) are the trough, are formed with the crest of arc form between two adjacent troughs, be provided with on round pin axle (11) and order about spheroid (7) fixed angle pivoted joint spare (16).

5. A bellows (4) ball valve according to claim 4, characterized in that: the joint piece (16) is including fixing installation cover (17) on round pin axle (11), fixing spring (18) in installation cover (17), fixing hitting ball (19) on spring (18) free end, the mounting groove has been seted up to the tip of round pin axle (11), installation cover (17) are inlayed and are established and fix in the mounting groove.

6. A bellows (4) ball valve according to claim 5, characterized in that: the collision ball (19) is arranged in a hollow manner, and metal sand is filled in an inner cavity of the collision ball (19).

7. A bellows (4) ball valve according to claim 1, characterized in that: the driving piece (8) is an air cylinder, and a piston rod of the air cylinder is detachably connected with the upper end of the valve rod (3).

8. A bellows (4) ball valve according to claim 1, characterized in that: go up the shaping on the inner chamber lateral wall of valve body and have second annular (20), install in second annular (20) first annular plate (5), the both sides of first annular plate (5) all are fixed with seal gasket (21), the inner wall of seal gasket (21) laminating second annular (20).

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