CN107654690A - Bi-directional sealed V shape regulation ball valve - Google Patents

Abstract

The invention relates to a two-way sealed V-shaped regulating ball valve, which includes a valve body, a valve stem, a V-shaped ball and a valve seat. A flow channel is arranged in the valve body, and the valve stem drives the V-shaped ball to rotate to control the cutting or circulation of the flow channel. In the flow channel and in a sealing fit with the V-shaped ball, the V-shaped ball is provided with a V-shaped notch on the other side of the valve seat. The valve stem includes the upper part of the valve stem above the V-shaped ball and the lower part of the valve stem below the V-shaped ball. The upper part of the valve stem and the lower part of the valve stem are coaxially arranged, the upper part of the valve stem is in rotation with the valve body, the lower part of the valve stem is fixedly matched with the valve body, and the upper part of the valve stem is provided with an upper linkage part extending into the V-shaped ball. The outer circumference is provided with internal splines, the V-shaped sphere is provided with an upper linkage ring sleeved on the outer circumference of the upper linkage part, and the inner circumference of the upper linkage ring is provided with external splines engaged with the inner splines. By adopting the above scheme, the present invention provides a head-to-head hard-seal rotary butterfly valve that does not require installation holes between the disc plate and the valve stem to ensure the strength of the valve stem.

Description

Two-way sealing V-shaped regulating ball valve

technical field

The invention relates to a V-shaped ball valve, in particular to a two-way sealing V-shaped regulating ball valve.

Background technique

The V-shaped ball valve is a valve whose opening and closing part (V-shaped ball) is driven by the valve stem and rotates around the ball valve axis, while the V-shaped regulating ball valve can increase the opening of the flow channel on the basis of the ball valve to realize the flow rate. The changing function makes the function of the V-shaped ball valve diversified.

The following problems exist in the daily work of the V-shaped ball valve: ① The V-shaped ball valve is linked with the valve stem through a fixing piece (fixed pin or fixing bolt), and it is necessary to set a pin hole or a threaded hole on the valve stem in advance. The strength of the valve stem, when the strength of the valve stem is reduced, it is easy to cause damage to the valve stem; ②When the V-shaped ball valve is working, there will be a block of impurities stuck in the seal between the V-shaped ball and the valve seat, causing the valve to open and close. will damage the sealing surface.

Contents of the invention

Aiming at the deficiencies in the prior art, the purpose of the present invention is to provide a head-to-head hard-seal rotary butterfly valve that does not require installation holes between the disc plate and the valve stem to ensure the strength of the valve stem.

In order to achieve the above object, the present invention provides the following technical solutions: including a valve body, a valve stem, a V-shaped ball and a valve seat, the valve body is provided with a flow passage, and the valve stem drives the V-shaped ball to rotate and control the flow passage The cut-off or flow, said installed in the flow channel and is in sealing fit with the V-shaped ball, the V-shaped ball facing the other side of the valve seat is provided with a V-shaped notch, the valve stem includes a The upper part of the valve stem above and the lower part of the valve stem located below the V-shaped sphere are characterized in that: the upper part of the valve stem and the lower part of the valve stem are coaxially arranged, the upper part of the valve stem is in rotation with the valve body, and the valve The lower part of the stem is fixedly fitted with the valve body. The upper part of the valve stem is provided with an upper linkage part extending into a V-shaped sphere. The outer periphery of the upper linkage part is provided with an inner spline. The V-shaped sphere is set on the upper linkage The upper linkage ring on the outer periphery of the upper linkage ring, the inner circumference of the upper linkage ring is provided with an outer spline that engages with the inner spline, and the upper part of the valve stem is provided with an upper limit step that is against the upper end of the upper linkage ring. The lower part of the valve stem is provided with a lower linking part extending into a V-shaped sphere, the V-shaped sphere is provided with a lower linking ring sleeved on the outer periphery of the lower linking part, and a linking bearing is arranged between the lower linking part and the lower linking ring, The lower part of the valve stem is provided with a lower limit step against the lower end of the lower linkage ring.

By adopting the above technical scheme, the spline linkage method is used for installation and linkage, so as to avoid the reduction of the strength of the valve stem due to the opening of the installation hole, and the spline linkage has good bearing capacity, good neutrality, and can bear the torque of the valve stem evenly. In addition, The combination of the upper limit step and the lower limit step constitutes the axial positioning of the V-shaped sphere relative to the valve stem, so that the V-shaped sphere and the valve stem can be combined and installed stably, and the upper part of the valve stem and the lower part of the valve stem are coaxially arranged, the opening and closing torque is light, and the friction Small, thereby reducing wear and tear.

The present invention is further provided that: the V-shaped sphere is provided with several V-shaped sub-notches arranged vertically in the V-shaped notch and used to cut off impurities in a block.

By adopting the above-mentioned technical scheme, multiple V-shaped sub-notches cooperate to cut the blocky impurities everywhere when the V-shaped sphere is in different opening states and adjusting the flow rate. After cutting, the blocky impurities will not be blocked in the Agglomerated impurities can avoid jamming of the valve opening and closing and damage to the sealing surface.

In the present invention, it is further set that: the angles of the opening angles of the V-shaped sub-notches are different.

By adopting the above-mentioned technical scheme, the V-shaped sub-notches with different angles are used to cut block impurities of different sizes, and the block impurities of larger sizes can also be cut multiple times and sequentially through the medium flow to ensure the completeness of cutting.

The present invention is further set up as follows: the valve body is provided with a sliding cavity for the valve seat to slide in the direction close to the V-shaped sphere, and a valve seat is provided between the sliding cavity and the valve seat to reset the valve seat to the V-shaped sphere. The reset member, the end of the valve seat facing the V-shaped ball is provided with a main ordinary seal that is against the valve seat and a main hard sealing surface with a switching gap between the valve seat and the V-shaped ball.

By adopting the above technical scheme, the main ordinary seal is used as a daily seal, and the reset part ensures the tightness between the main ordinary seal and the V-shaped sphere. When a special situation occurs, the main ordinary seal is burnt and melted, and the reset part Compensate the position of the valve seat to the V-shaped sphere until the main hard sealing surface and the V-shaped sphere fit together to form a sealed fit, ensuring that the medium will not leak under any circumstances. The distance between the main hard sealing surface and the V-shaped sphere Switch the gap to avoid contact wear between the two during daily sealing and prolong the service life.

The present invention is further set as follows: the sliding chamber is provided with a sliding surface that slides and cooperates with the valve seat, and the valve seat is provided with a first sealing groove and a second sealing groove facing the sliding surface, and the first sealing groove is arranged on the sliding surface. The first sealing groove is provided with a side common seal that is sealingly matched with the sliding surface, and the second sealing groove is provided with a side fireproof seal that is sealingly matched with the sliding surface.

By adopting the above-mentioned technical scheme, the side ordinary seal cooperates with the side ordinary seal to realize the sliding seal between the valve seat and the sliding chamber, and prevent the medium from leaking from the gap between the valve seat and the sliding chamber, and the two seals also make The seal is more comprehensive.

The present invention is further provided that: the valve body is located above the flow channel and is provided with an upper rotating chamber that is rotatably matched with the upper part of the valve stem, and a self-lubricating bearing is arranged between the inner wall of the upper rotating chamber and the outer periphery of the upper part of the valve stem.

By adopting the above technical scheme and adding self-lubricating bearings, the opening and closing performance is stable and reliable, with little wear, small friction, light torque, and the inconvenience caused by lubricating the bearings is reduced.

The present invention is further set as follows: above the valve body, a connection plate and a stuffing box are arranged sequentially from top to bottom, and the connection plate, stuffing box and valve body are provided with positioning pin holes vertically and coaxially, A positioning pin is perforated in the positioning pin hole.

By adopting the above-mentioned technical scheme, the valve body, stuffing box, and connection plate are positioned with an integrated pin shaft, so that the opening and closing of the valve will not loosen and cause inaccurate opening, and the accuracy of flow regulation can be improved.

The present invention is further configured as follows: each gap between the connecting plate, the stuffing box and the valve body is provided with a gap seal.

By adopting the above-mentioned technical scheme and adding gap seals, the connecting plate, stuffing box and valve body constitute a fully sealed support, which is suitable for all-weather working conditions, and will not enter the inside of the valve body or the sealing part even in the case of a strong wind and sand environment.

The present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.

Description of drawings

Fig. 1 is the structural representation of the specific embodiment of the present invention;

Figure 2 is an enlarged view of A in Figure 1;

Fig. 3 is an enlarged view of B in Fig. 1 .

Detailed ways

As shown in Figures 1 to 3, the present invention discloses a two-way sealing V-shaped regulating ball valve, including a valve body 1, a valve stem 2, a V-shaped ball 3 and a valve seat 4, and the valve body 1 is provided with a flow channel 11, The valve stem 2 drives the V-shaped ball 3 to rotate to control the cut-off or flow of the flow channel 11. It is installed in the flow channel 11 and is in a sealing fit with the V-shaped ball 3. The other side of the V-shaped ball 3 facing the valve seat 4 is provided with a V-shaped Notch 31, the valve stem 2 includes the valve stem upper part 21 located above the V-shaped sphere 3 and the valve stem lower part 22 located below the V-shaped sphere 3, the valve stem upper part 21 and the valve stem lower part 22 are coaxially arranged, the valve stem upper part 21 and the valve stem The body 1 rotates and cooperates, and the upper part 21 of the valve stem is fixedly matched with the valve body. The upper part 21 of the valve stem is provided with an upper linkage part 23 extending into the V-shaped sphere 3. The outer periphery of the upper linkage part 23 is provided with an inner spline 231, and the V-shaped sphere 3. Set the upper linkage ring 32 which is sleeved on the outer circumference of the upper linkage part 23. The inner circumference of the upper linkage ring 32 is provided with an outer spline 321 meshing with the inner spline 231. The upper part 21 of the valve stem is provided with an upper limit which is offset against the upper end of the upper linkage ring. Position step 211, the valve stem lower part 22 is provided with the lower linking part 24 extending into the V-shaped ball 3, the V-shaped ball 3 is provided with the lower linking ring 33 sleeved on the outer periphery of the lower linking part 24, the link between the lower linking part 24 and the lower linking ring 33 A linkage bearing 34 is arranged between them, and the lower part 22 of the valve stem is provided with a lower limit step 221 which is offset against the lower end of the lower linkage ring 33, and the installation and linkage are carried out by means of spline linkage, so as to avoid reducing the strength of the valve stem 2 due to the opening of the installation hole, and The spline linkage has good bearing capacity, good neutrality, and evenly bears the torque of the valve stem 2. In addition, the combination of the upper limit step 211 and the lower limit step 221 constitutes the axial positioning of the V-shaped sphere 3 relative to the valve stem 2, so that the V-shaped sphere 3 and the valve stem 2 can be installed in a stable combination, and the upper part 21 of the valve stem and the lower part 22 of the valve stem are coaxially arranged, the opening and closing torque is light, and the friction is small, thereby reducing wear and tear. The linkage bearing 34 can be selected from a self-lubricating bearing.

The V-shaped sphere 3 is located at the V-shaped notch 31 and is provided with several V-shaped sub-notches 311 that are vertically arranged and used to cut off impurities in blocks. When adjusting the flow rate and adjusting the flow rate, the agglomerated impurities in various places are cut, and the agglomerated impurities after cutting will not be blocked by the agglomerated impurities, so as to avoid jamming of the valve opening and closing and damage to the sealing surface.

The valve body 1 is provided with a sliding cavity 12 for the valve seat 4 to slide in the direction close to the V-shaped sphere 3 , and a reset member 13 is provided between the sliding cavity 12 and the valve seat 4 to reset the valve seat 4 to the V-shaped sphere 3 The reset member 13 is preferably a cylindrical spring, and is provided with a spring groove 48 for installing the reset member 13. The end of the valve seat 4 towards the V-shaped ball 3 is provided with a main common seal 41 that is against the valve seat 4 and is connected to the V-shaped ball. 3, there is a main hard sealing surface 42 with a switching gap 43, and the main ordinary seal 41 is used as a daily seal, and the reset member 13 ensures the tightness between the main ordinary seal 41 and the V-shaped ball 3. If the main ordinary seal 41 is burned out and melted, the reset member 13 compensates the position of the valve seat 4 to the V-shaped ball 3 until the main hard sealing surface 42 and the V-shaped ball 3 fit together to form a sealing fit for high-temperature emergency sealing , to ensure that the medium will not leak under any circumstances. The switching gap 43 between the main hard sealing surface 42 and the V-shaped ball 3 can avoid the contact wear of the two during daily sealing and prolong the service life. The main ordinary seal 41 The material is explosion-proof fluororubber.

The sliding chamber 12 is provided with a sliding surface 121 that is slidingly matched with the valve seat 4, and the valve seat 4 is provided with a first sealing groove 44 and a second sealing groove 45 facing the sliding surface 121, and the first sealing groove 44 is provided with a The side common seal 46 that is sealingly matched with the sliding surface 121, and the side fireproof seal 47 that is sealingly matched with the sliding surface 121 is arranged in the sealing groove, and the side common seal 46 cooperates with the side fireproof seal 47 to realize valve seat 4 The sliding seal between the valve seat 4 and the sliding chamber 12 prevents the medium from leaking from the gap between the valve seat 4 and the sliding chamber 12. The two seals also make the sealing more comprehensive. The material of the side common seal 46 is explosion-proof fluororubber. The side fireproof seal 47 is made of braided stainless steel and flexible graphite.

The valve body 1 is located above the flow channel 11 and is provided with an upper rotating chamber 14 that is rotatably matched with the upper part 21 of the valve stem. A self-lubricating bearing 15 is provided between the inner wall of the upper rotating chamber 14 and the outer periphery of the upper part 21 of the valve stem. A self-lubricating bearing 15 is added. The opening and closing performance is stable and reliable, with little wear, small friction, light torque, and reduces the inconvenience caused by lubricating bearings.

The upper part of the valve body 1 is provided with a connecting plate 16 and a stuffing box 17 in order from top to bottom, and the connecting plate 16, the stuffing box and the valve body 1 are vertically and coaxially provided with a positioning pin hole 18, and the positioning pin hole 18 penetrates A positioning pin 19 is provided, and the valve body 1, stuffing box, and connection plate 16 are positioned by an integrated pin shaft, so that the opening and closing of the valve will not loosen to cause inaccurate opening, and the accuracy of flow regulation can be improved.

Each gap between the connecting plate 16, the stuffing box 17 and the valve body 1 is provided with a gap seal 10, and the gap seal 10 is added to make the connecting plate 16, the stuffing box and the valve body 1 form a fully sealed bracket, which is suitable for For all-weather working conditions, even if there is a strong wind and sand environment, it will not enter the interior of the valve body 1 or the sealing part. The gap seal 10 can be in various sealing forms such as packing and sealing ring.

Claims (8)

1. A two-way sealing V-shaped regulating ball valve, comprising a valve body, a valve stem, a V-shaped sphere and a valve seat, a flow channel is arranged in the valve body, and the valve stem drives the V-shaped sphere to rotate and control the cutting of the flow channel Or flow, the said is installed in the flow channel and is in sealing fit with the V-shaped ball, and the other side of the V-shaped ball facing the valve seat is provided with a V-shaped notch, and the valve stem includes a valve located above the V-shaped ball The upper part of the valve stem and the lower part of the valve stem located below the V-shaped sphere are characterized in that: the upper part of the valve stem and the lower part of the valve stem are arranged coaxially, the upper part of the valve stem is rotatably matched with the valve body, and the lower part of the valve stem It is fixedly matched with the valve body, the upper part of the valve stem is provided with an upper linkage part extending into a V-shaped sphere, the outer periphery of the upper linkage part is provided with internal splines, and the V-shaped sphere is set on the outer periphery of the upper linkage part The upper linkage ring, the inner circumference of the upper linkage ring is provided with external splines engaged with the inner splines, the upper part of the valve stem is provided with an upper limit step that is offset against the upper end of the upper linkage ring, and the valve stem The lower part is provided with a lower linkage part extending into a V-shaped sphere, the V-shaped sphere is provided with a lower linkage ring sleeved on the outer periphery of the lower linkage part, and a linkage bearing is arranged between the lower linkage part and the lower linkage ring. The lower part of the valve stem is provided with a lower limit step against the lower end of the lower linkage ring. 2. The two-way sealing V-shaped regulating ball valve according to claim 1, characterized in that: the V-shaped sphere is located in the V-shaped notch and is provided with several V-shaped sub-notches arranged vertically and used to cut off impurities in a block. 3. The two-way sealing V-shaped regulating ball valve according to claim 2, characterized in that: the opening angles of the V-shaped sub-notches are different in size. 4. The two-way sealing V-shaped regulating ball valve according to claim 1, 2 or 3, characterized in that: the valve body is provided with a sliding cavity for the valve seat to slide in the direction close to the V-shaped sphere, and the Between the sliding chamber and the valve seat, there is a reset member that resets the valve seat to the V-shaped ball. The end of the valve seat facing the V-shaped ball is provided with a main common seal that is offset against the valve seat and is connected to the V-shaped ball. The main hard sealing surface with switching gap between them. 5. The two-way sealing V-shaped regulating ball valve according to claim 1, 2 or 3, characterized in that: the sliding chamber is provided with a sliding surface that slides and cooperates with the valve seat, and the valve seat faces toward the sliding surface. The sliding surface is provided with a first sealing groove and a second sealing groove. The first sealing groove is provided with a side common seal that is sealingly matched with the sliding surface. The second sealing groove is provided with a Seal-fit side fire seals. 6. The two-way sealing V-shaped regulating ball valve according to claim 1, 2 or 3, characterized in that: the valve body is located above the flow channel and is provided with an upper rotating chamber that is rotatably matched with the upper part of the valve stem, and the upper A self-lubricating bearing is arranged between the inner wall of the rotating chamber and the outer periphery of the upper part of the valve stem. 7. The two-way sealed V-shaped regulating ball valve according to claim 1, 2 or 3, characterized in that: the upper part of the valve body is provided with a connecting plate and a stuffing box in sequence from top to bottom, and the connecting plate , The stuffing box and the valve body are vertically and coaxially provided with positioning pin holes, and positioning pins are pierced in the positioning pin holes. 8. The two-way sealing V-shaped regulating ball valve according to claim 7, characterized in that: gap seals are provided in each gap between the connecting plate, the stuffing box and the valve body.