CN218177947U - High-reliability long-life automatic butterfly valve - Google Patents

Abstract

The utility model discloses a high-reliability long-life automatic butterfly valve, wherein a valve rod sleeve for accommodating a valve rod is arranged at the upper part of a valve body, a valve rod sleeve flange is arranged at the top of the valve rod sleeve, a secondary seal seat is pressed on the upper end face of the valve rod sleeve flange, and the upper end of the valve rod passes through a central hole of the secondary seal seat and is connected with the output end of an actuator; the lower end face of the secondary sealing seat is provided with a sealing ring groove, a secondary sealing ring is embedded in the sealing ring groove, the inner circumference of the secondary sealing ring is sealed with the valve rod, and the lower end face of the secondary sealing ring is tightly pressed on the upper end face of the valve rod sleeve flange; the upper end face of the second-stage sealing seat is provided with a radial overflow groove which is vertically crossed with the central hole and is communicated with the central hole, the upper end face of the second-stage sealing seat is abutted against the lower part of the output end flange of the actuator, and a fixing bolt correspondingly penetrates through a bolt hole of the valve rod sleeve flange and the output end flange of the actuator to clamp the second-stage sealing seat. The butterfly valve has long service life, can be continuously used only by replacing the second-stage seal after leakage, does not need to replace a new butterfly valve, and saves a large amount of cost.

Description

High-reliability long-life automatic butterfly valve

Technical Field

The utility model relates to a butterfly valve especially relates to a high reliable long-life automatic butterfly valve, belongs to pneumatics or electric valve technical field.

Background

Pneumatic, electric butterfly valve are automatic control valve commonly used at present, use more and more in oil, petrochemical industry production technology very much, and the structure of pneumatic, electric butterfly valve that uses at present mainly comprises two parts: by pneumatic or electric drive's executor and butterfly valve body, be equipped with the butterfly valve plate in the butterfly valve body, the center of butterfly valve plate is equipped with the valve rod, perhaps the valve rod is connected at the top of butterfly valve plate, and the executor passes through the flange and links to each other with the upper end of valve rod. When the butterfly valve works, an output shaft of the actuator drives the valve rod to rotate, and the valve rod drives the butterfly valve plate to do reciprocating rotary motion in 0-90 degrees, so that the butterfly valve plate is opened or closed. The butterfly valve is closed by matching the valve plate with the embedded sealing ring in the valve, a through hole is formed in the top of the embedded sealing ring in the valve and used for the valve rod to penetrate out, and the valve rod is tightly matched with the through hole of the embedded sealing ring in the valve to realize sealing.

The traditional pneumatic and electric butterfly valve has the following defects: 1. because the butterfly valve actuator and the butterfly valve plate are connected with the valve rod through the flange, the shaft sealing surface embedded with the sealing ring in the valve is abraded due to frequent reciprocating rotation of the valve rod, and fluid leakage is caused; when the valve rod generates fluid leakage, because the hidden part is difficult to find in time, the fluid can enter the inside of the actuator along the rotating valve rod, so that the internal elements of the actuator are corroded and damaged, and the valve cannot work.

2. The sealing principle of butterfly valve and valve rod is that inlay the top trompil of sealing washer in the valve, and the valve rod passes from downthehole to be connected with the butterfly plate, and after the sealed position wearing and tearing, the sealed department seepage of valve rod can't adjust sealed situation to also can not change seal part, only the butterfly valve body of renewal, cause very big spare part consumption and stop production and damage.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to overcome the problem that exists among the prior art, provide a high reliable long-life automatic butterfly valve, the life cycle is long, only needs to change the second grade after the discovery seepage and seals just can continue the use, need not the butterfly valve of more renew, practices thrift a large amount of cost expenses.

In order to solve the technical problem, the utility model discloses a high-reliability long-life automatic butterfly valve, including valve body and executor, be equipped with the valve plate in the passageway of valve body, the internal perisporium of passageway is equipped with in-valve inlay sealing washer and valve body and realizes sealing, the top of valve plate is connected with the valve rod, the valve rod is worn out and closely cooperates and realizes sealing from the through-hole of in-valve inlay sealing washer top, the upper portion of valve body is equipped with the valve rod cover that holds the valve rod, the top of valve rod cover is equipped with the valve rod cover flange, the up end of valve rod cover flange is pressed there is the second grade seal receptacle, the upper end of valve rod passes from the centre bore of second grade seal receptacle and links to each other with the output of executor; a sealing ring groove is formed in the lower end face of the secondary sealing seat, a secondary sealing ring is embedded in the sealing ring groove, the inner periphery of the secondary sealing ring is sealed with the valve rod, and the lower end face of the secondary sealing ring is tightly pressed on the upper end face of the valve rod sleeve flange; the upper end face of the second-stage sealing seat is provided with a radial overflow groove which is vertically crossed with the central hole and is communicated with the central hole, the upper end face of the second-stage sealing seat is abutted against the lower part of an output end flange of the actuator, and a fixing bolt correspondingly penetrates through a bolt hole of the valve rod sleeve flange and a bolt hole of the output end flange of the actuator to clamp the second-stage sealing seat.

As the utility model discloses an improvement, the periphery cover of valve stem cover flange and executor output end flange is equipped with the water logging sensor, the signal line of water logging sensor links to each other with site controller's signal input part, site controller passes through Zigbee wireless protocol and is connected with the room host computer communication on duty, the fault signal output part of the room host computer on duty links to each other with fault indicator lamp or audible-visual annunciator.

Compared with the prior art, the utility model discloses following beneficial effect has been obtained: 1. the sealing effect is improved, and the sealing time is prolonged; the design of two-stage sealing is adopted, namely, the first-stage sealing is the sealing between an embedded sealing ring in the original valve and a valve rod; the secondary seal is formed by adding a set of compression rubber ring sealing structure, when the valve rod leaks, the radial overflow groove overflows leaked fluid, so that workers can find out seal failure in time, the problem of seal failure can be solved only by replacing the secondary seal ring without replacing a butterfly valve, the operation time and the working strength are reduced, and the cost is saved;

2. the labor workload is reduced, the maintenance operation is convenient and fast, and the production stop loss is reduced;

3. after the valve rod of the butterfly valve leaks, the leakage fluid can be effectively prevented from entering the interior of the actuator, the actuator element is prevented from being corroded and damaged due to leakage, the workload is reduced, and the cost is saved;

4. by utilizing the information technology, the leakage alarm valve has the functions of signal acquisition, transmission and alarm of fluid leakage and overflow, signals are transmitted in time after the valve rod leaks, and leakage faults can be rapidly processed and eliminated.

Drawings

The invention will be described in further detail with reference to the drawings and the detailed description, which are provided for reference and illustration purposes only and are not intended to limit the invention.

FIG. 1 is a front view of the high-reliability long-life automatic butterfly valve of the present invention;

FIG. 2 is a right side view of FIG. 1;

FIG. 3 is a perspective view of FIG. 1;

FIG. 4 is an exploded view of FIG. 3;

fig. 5 is a sectional view of the second-stage sealing seat and the second-stage sealing ring of the present invention;

FIG. 6 is a perspective view of FIG. 5;

fig. 7 is a signal transmission schematic diagram of the middle water sensor of the present invention.

In the figure: 1. a valve body; 2. a valve plate; 3. a sealing ring is embedded in the valve; 4. a valve stem; 5. a valve stem sleeve; 5a, a valve rod sleeve flange; 6. a secondary seal seat; 6a, sealing the ring groove; 6b, radial overflow grooves; 7. a secondary seal ring; 8. fixing the bolt; 9. an actuator; 10. a water sensor.

Detailed Description

In the following description of the present invention, the terms "upper", "lower", "front", "rear", "left", "right", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are merely for convenience of description and simplified description, and do not mean that the device must have a specific orientation.

As shown in fig. 1 to 6, the utility model discloses a high-reliability long-life automatic butterfly valve includes valve body 1 and executor 9, is equipped with valve plate 2 in the passageway of valve body 1, and the internal perisporium of passageway is equipped with inlays in the valve and seals 3 and realize sealedly with valve body 1, and the top of valve plate 2 is connected with valve rod 4, and valve rod 4 wears out and closely cooperates the realization sealedly in the through-hole of inlaying 3 tops of sealing washer in the valve, and the upper portion of valve body 1 is equipped with the valve rod cover 5 that holds valve rod 4, and the top of valve rod cover 5 is equipped with valve rod cover flange 5a.

The upper end face of the valve rod sleeve flange 5a is pressed with a secondary sealing seat 6, and the upper end of the valve rod 4 passes through a central hole of the secondary sealing seat 6 and is connected with the output end of the actuator 9. The lower terminal surface of second grade seal receptacle 6 is equipped with sealed annular 6a, has inlayed secondary seal circle 7 in the sealed annular 6a, and the interior week of secondary seal circle 7 realizes sealedly with valve rod 4, and the lower terminal surface of secondary seal circle 7 compresses tightly the up end at valve rod cover flange 5a. The upper end face of the secondary sealing seat 6 is abutted against the lower portion of an output end flange of the actuator 9, and the fixing bolt 8 correspondingly penetrates through a bolt hole of the valve rod sleeve flange 5a and a bolt hole of the actuator output end flange to clamp the secondary sealing seat 6.

The upper end face of the secondary sealing seat 6 is provided with a radial overflow groove 6b which is vertically crossed with the central hole and is communicated with the central hole, if the sealing between the through hole at the top of the embedded sealing ring 3 in the valve and the valve rod 4 fails, leakage liquid ascends along the inner cavity of the valve rod sleeve 5 and reaches the upper part of a valve rod sleeve flange 5a. If the secondary sealing ring 7 also fails, the leakage liquid continues to cross the secondary sealing ring 7, reaches the upper end face of the secondary sealing seat 6, can overflow to the periphery of the secondary sealing seat along the radial overflow groove 6b, then falls on the valve rod sleeve flange 5a and continues to flow downwards. Due to the overflow and pressure relief effects of the radial overflow groove 6b, leakage liquid cannot continuously flow upwards, and the leakage liquid is prevented from ascending into the actuator 9, so that the damage caused by corrosion of elements in the actuator 9 is avoided.

The periphery of the valve stem sleeve flange 5a and the output end flange of the actuator is sleeved with a water sensor 10, a shell of the water sensor 10 is formed by two symmetrical halves in a surrounding mode, and detection is carried out by utilizing a liquid conduction principle. The two-pole probe is insulated by air in normal time; the probe is conducted in a water immersion state, and the sensor outputs a dry contact signal. When the probe is immersed in water to a height of about 1 mm, an alarm signal is generated.

As shown in fig. 7, a signal line of the water sensor 10 is connected to a signal input terminal of a field controller, the field controller is in communication connection with a duty room host via a Zigbee wireless protocol, and a fault signal output terminal of the duty room host is connected to a fault indicator lamp or an audible and visual alarm.

The sealing device of the butterfly valve adopts the secondary sealing of a newly added sealing device under the condition of not changing the air circuits, structures and transmission principles of pneumatic and electric butterfly valves, and mainly solves the problems that the leakage of the intermediate shaft of the butterfly valve can be found in time, the maintenance is convenient, the fluid is prevented from leaking into the actuator 9 and the like.

When (pneumatic or electric) executor output shaft drives valve rod 4 of butterfly valve and does 0 to 90 degrees reciprocating rotary motion, because inlay sealing washer 3 and valve rod 4 looks mutual friction in the valve, when the seal clearance grow, during the outside seepage of fluid, the liquid of seepage upwards flows along valve rod 4, when liquid flows to newly-increased second grade sealing device, because the sealing effect of second grade sealing washer 7 in the second grade seal receptacle 6, the seepage fluid is blockked up by second grade sealing washer 7, no longer outside seepage, the butterfly valve normally works.

When the secondary sealing ring 7 is worn, leaked fluid can seep out along the radial overflow groove 6b on the upper end surface of the secondary sealing seat, and after seepage liquid flows into the water sensor 10, an alarm electric signal is sent out under the conduction action of a conductor, and the electric signal is transmitted to a duty room through Zigbee, so that workers on duty can timely deal with the problem. Only need dismantle executor 9 and butterfly valve connection's fixing bolt 8, change second grade sealing washer 7 in the second grade seal receptacle 6 and just can continue to use, spare parts cost is extremely low, and the maintenance simple operation need not to change the butterfly valve, has practiced thrift a large amount of cost expenses.

After this butterfly valve sealing device developed successfully, successively used at the true wu water injection station sewage filtration system in Jiangsu oil field, installed in batches and tried electric, pneumatic butterfly valve, the time period on trial was one year, through maintenance data statistics, only changed the second grade during the trial sealed, executor 9 and butterfly valve do not have the change record, do not have the seepage of an instance promptly and lead to corroding, damage phenomenon because of the medium, prolonged the life cycle of butterfly valve greatly.

Before the butterfly valve sealing device is installed, the longest service time of each actuator 9 and the butterfly valve is more than 4 months, and the actuators and the butterfly valve can be completely replaced after being used for about 2 months; after installation, the service cycle time exceeds 1 year; before installation, the butterfly valve needs to be replaced by three persons for more than 2 hours, and meanwhile, the butterfly valve can be replaced only by stopping production; after the installation, the secondary seal is replaced without stopping production, and only half an hour is needed by one person to complete the replacement, so that the labor workload is greatly reduced, the maintenance and the operation are convenient and fast, and the cost is reduced.

The above description is only a preferred embodiment of the present invention, and not intended to limit the scope of the present invention. In addition to the above embodiments, the present invention may have other embodiments. All technical solutions formed by adopting equivalent replacement or equivalent transformation fall within the protection scope required by the utility model. The technical features of the present invention that have not been described can be realized by or using the prior art, and are not described herein again.

Claims (2)

1. The utility model provides a high-reliability long-life automatic butterfly valve, includes valve body and executor, be equipped with the valve plate in the passageway of valve body, the internal perisporium of passageway is equipped with in the valve inlays the sealing washer and realizes sealedly with the valve body, the top of valve plate is connected with the valve rod, the valve rod is worn out and closely cooperates and realizes sealedly in inlaying the through-hole at sealing washer top in the valve, the upper portion of valve body is equipped with the valve rod cover that holds the valve rod, the top of valve rod cover is equipped with valve rod cover flange, its characterized in that: a secondary sealing seat is pressed on the upper end face of the valve rod sleeve flange, and the upper end of the valve rod penetrates through a central hole of the secondary sealing seat and is connected with the output end of the actuator; a sealing ring groove is formed in the lower end face of the secondary sealing seat, a secondary sealing ring is embedded in the sealing ring groove, the inner periphery of the secondary sealing ring is sealed with the valve rod, and the lower end face of the secondary sealing ring is tightly pressed on the upper end face of the valve rod sleeve flange; the upper end face of the second-stage sealing seat is provided with a radial overflow groove which is vertically crossed with the central hole and is communicated with the central hole, the upper end face of the second-stage sealing seat is abutted against the lower part of an output end flange of the actuator, and a fixing bolt correspondingly penetrates through a bolt hole of the valve rod sleeve flange and a bolt hole of the output end flange of the actuator to clamp the second-stage sealing seat.

2. The high-reliability long-life automatic butterfly valve according to claim 1, characterized in that: the periphery of the valve stem sleeve flange and the periphery of the actuator output end flange are sleeved with water immersion sensors, signal lines of the water immersion sensors are connected with signal input ends of a field controller, the field controller is in communication connection with a duty room host through a Zigbee wireless protocol, and a fault signal output end of the duty room host is connected with a fault indicator lamp or an audible and visual alarm.

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