CN210266733U

CN210266733U - Pipeline overspeed shutoff device

Info

Publication number: CN210266733U
Application number: CN201920620901.9U
Authority: CN
Inventors: 王焕彩; 黄政洲; 黄云平; 尹建敏
Original assignee: Zhengzhou Pump Valve Manufacturing Co ltd
Current assignee: Zhengzhou Pump Valve Manufacturing Co ltd
Priority date: 2019-04-30
Filing date: 2019-04-30
Publication date: 2020-04-07
Anticipated expiration: 2029-04-30

Abstract

The utility model discloses a pipeline overspeed turn-off device, including body and frame, the body sets up the one side in the frame, the swing is provided with the weight in the frame, be formed with the swing groove in the frame, the weight passes through the pendulum rod swing and sets up on the swing groove, it is provided with the driving piece to correspond the pendulum rod position in the frame, the frame is provided with locking mechanical system, be provided with the detection mouth on the body lateral wall, be provided with the mount table on the detection mouth, the mount table switches on through detection mouth and body, it is provided with the cam to rotate on the mount table lateral wall, the cam has the axis of rotation to extend in the mount table, the axis of rotation rotates with the mount table to be connected, the fixed sensing board that is provided with in the axis of rotation, the sensing board passes through the detection mouth and extends the setting in. The device can effectively monitor the pipeline medium, can cut off the pipeline fast when the medium velocity of flow is too big, and simple structure does benefit to realization and use simultaneously.

Description

Pipeline overspeed shutoff device

Technical Field

The utility model belongs to the technical field of valve drive and control technique and specifically relates to a pipeline fluid directly participates in overspeed shutoff valve drive arrangement of control.

Background

An overspeed shutoff valve with safety protection is arranged in a long-distance fluid conveying pipeline, and when pipe explosion or other accidents occur at the downstream of the pipeline and the fluid in the pipeline exceeds the speed limit, the valve is quickly closed to avoid the situation expansion. The valve closing process is divided into a fast phase and a slow phase: the valve is closed quickly to cut off most of water flow and then closed slowly to eliminate water hammer. The valve is arranged in a long delivery pipeline in a grading way, is often installed in a remote valve well, is kept in an open state under normal working conditions, and does not need to be maintained by personnel; when an accident occurs, the monitoring device monitors the medium overspeed change, sends out a mechanical switching signal, and the valve driving device drives the valve to close. According to this mode of operation, a purely mechanical maintenance-free drive is most suitable: when the valve is manually opened or temporarily electrically opened, the energy for closing the valve is stored, the valve is kept at a full opening position through a locking device, and the valve is not required to be additionally provided with other position-keeping energy sources after being opened; when the medium is overspeed, the monitoring device sends out a mechanical switching signal, the pressure energy of the pipeline medium is directly utilized to unlock, and the valve is driven by the heavy hammer potential energy to close. Therefore, the power distribution cost and the electrical maintenance cost of remote places are avoided, electrical faults are avoided, and the reliability of the pipeline safety equipment is improved.

The fluid conveying pipeline is usually provided with a monitoring device for monitoring the flow velocity of the pipeline medium, the existing monitoring device usually adopts an electronic sensing technology and is connected to an automatic control system, and the mode has the advantages of higher cost, easy damage in the pipeline and shorter service life; and can only respond to the overspeed signal in an electrical control mode, and is not suitable for monitoring and signaling of a purely mechanical pipeline safety protection device. At present, a mechanical monitoring device is also adopted, the structure of the mechanical structure is complex, the detection reaction time is slow due to the adoption of the mechanical structure, and the monitoring and management effects cannot be effectively realized.

The overspeed shutoff valve generally uses a heavy hammer type transmission structure to control the on-off of liquid in a pipeline, when the overspeed shutoff valve is used, a heavy hammer is pushed by a pushing device to swing and rise the heavy hammer so as to open a valve path to realize a passage, when the valve path needs to be closed, the heavy hammer falls down so as to drive a structure inside the pipeline to realize the quick closing of the pipeline, at present, the locking after the heavy hammer rises is generally in a mode of continuously pushing by the pushing device, when the valve path is closed, the pushing is released so that the heavy hammer falls down, the heavy hammer part of the structure continuously butts against the pushing device, the pushing device is continuously in a working state, energy is wasted, and meanwhile, the service life of the pushing device is influenced by continuous pressure, so that the stability of the structure is influenced; and the working mode of continuously supplementing energy to compensate the leakage of the hydraulic system is not suitable for the working condition requirement of the overspeed shutoff valve on non-electricity maintenance-free self-retaining. Or the locking pin is vertical to the lifting track surface of the heavy hammer, when the lifting hammer is opened, the external force is released, and when the opening is in place, the external force is put into locking; when the valve is closed, the lock is withdrawn by external force, and the heavy hammer falls down to close the valve. However, the electric automatic working mode of locking and unlocking actions requiring external force participation is not suitable for the working condition requirement of the non-electric operation of the overspeed shutoff valve. Or the gravity center of the heavy hammer leans against the machine body structure through a critical line and then passes through the other pushing piece in the horizontal direction, when the valve path is closed, the output end of the pushing piece pushes the heavy hammer to cross the central axis and then fall, and therefore the valve path is quickly closed through the gravity of the heavy hammer. However, the valve closing pushing stroke is long, the operating force is large, and the low-pressure medium of the water conveying pipeline is not suitable to be directly used as a power source; and the verticality of valve installation and the possible jamming condition of long-term non-action of the valve can cause great influence on the closing action of the valve, the reaction speed is low, the emergency can not be well responded, and the safety performance and the use effect of the whole equipment are influenced.

SUMMERY OF THE UTILITY MODEL

The utility model provides a pipeline hypervelocity closing means can effectively monitor the pipeline medium, when the medium velocity of flow is too big, can drive the valve and cut off the pipeline fast, and simple structure does benefit to realization and use simultaneously.

The utility model provides a pipeline overspeed shutoff device, which comprises a pipe body and a frame, wherein the pipe body is arranged at one side of the frame, a heavy hammer is arranged on the frame in a swinging way to control the on-off of a medium in the pipe body, a swinging groove is formed on the frame, the heavy hammer is arranged on the swinging groove through the swinging of a swinging rod, a driving piece for pushing the swinging rod to enable the heavy hammer to vertically store energy and conduct the pipe body is arranged at the position corresponding to the swinging rod on the frame, a locking mechanism for locking and limiting the falling of the heavy hammer after the heavy hammer is lifted is arranged on the frame, a detection port is arranged on the side wall of the pipe body, a mounting table is arranged on the detection port and is communicated with the pipe body through the detection port, a cam is rotatably arranged on the side wall of the mounting table, a rotating shaft extends into the mounting table and is radially arranged, the rotating shaft is fixedly provided with a sensing plate which is used for driving the cam to rotate under the impact of a medium, the sensing plate extends into the pipe body through the detection port and is arranged towards the medium flow direction in the pipe body, the mounting table is further provided with a contact switch which is used for unlocking the locking mechanism to enable the heavy hammer to fall, and the contact switch is arranged close to one side of the cam protrusion.

The beneficial effect who so sets up is: the heavy hammer is arranged in the mode, the heavy hammer rises or falls, and the control valve circuit is opened and closed in the prior art and is a common mechanical mechanism, and details are omitted here, the rising action of the heavy hammer is preferably carried out in a mode that an oil cylinder is adopted for lifting or pushing, the heavy hammer can be lifted through an oil tank arranged inside the heavy hammer through a manual pump, a branch circuit or an oil circuit can also be arranged, oil is pressed in the oil tank, so that the driving piece works, and a flow regulating valve can be arranged in the pipeline, so that the output speed of the driving piece is controlled. When the medium flow rate sudden change increases in the body, can push up the sense board swing to drive the cam rotation, thereby quick feedback is on the scale of cam, thereby effectively monitor the pipeline medium velocity of flow, and the sense board here can be through changing the size of a dimension or stretching into the length of body and adjust the sensitivity of atress, and the structure has longer life simultaneously, and is not fragile, and overall structure is also very simple, does benefit to production and processing. Meanwhile, the cam rotates, the protruding position can abut against the contact switch, so that the locking mechanism is controlled to be tripped, the heavy hammer falls down, the valve path is closed, and the control is simple and the response is rapid.

The utility model discloses further set up as locking mechanical system detains and location hook including the location pendulum, the location pendulum is detained and is set up in the frame and form the locating hole in the frame through the connecting axle swing, the locating hole is higher than the setting of swing trench position, the location pendulum is detained one end and is the free end, and the other end is for the location end and be provided with the barb, the location hook sets up on the pendulum rod, the location hook forms the location after standing to the counter weight with the barb lock.

The beneficial effect who so sets up is: by adopting the scheme, the heavy hammer is enabled to stand up to accumulate gravitational potential energy through the driving piece, the standing of the heavy hammer does not exceed a critical line, no external force is applied to fall back against the standing direction in the state, in the standing process, the positioning hook on the swing rod can be abutted against the barb, meanwhile, the positioning pendulum buckle deflects, the positioning hook falls into the hook groove of the barb to realize buckling, after the buckling is completed, the driving piece completes the work, at the moment, the heavy hammer can be tensioned under the action of self gravity to tighten the positioning pendulum buckle, the positioning pendulum buckle is rotatably arranged on the rack, the heavy hammer is pulled, the heavy hammer cannot fall, and the positioning of the heavy hammer is completed. The locking device is simple in structure, capable of better positioning the heavy hammer, quite convenient to lock and operate, capable of being released only by enabling the swinging piece to rotate in the releasing direction when unlocking is needed, beneficial to operation and realization and capable of improving the using effect of the whole structure.

The utility model discloses further set up to the barb lateral surface is slick and sly curved surface, the location hook lateral surface moves along barb lateral surface radian and forms the lock of location hook and barb.

The beneficial effect who sets up like this is, adopts above-mentioned scheme, sets up to the rounding off curved surface, can be more smooth realization lock action, improves overall structure's result of use.

The utility model discloses further set up as in the frame in the location pendulum detain the free end and correspond the position and still be provided with and be used for making the location pendulum detain towards dropout direction pivoted dropout jar, dropout jar output sets up and sets up in location pendulum rod free end below along the direction of height.

The beneficial effect who so sets up is: adopt above-mentioned scheme, set up the dropout jar, need not pull the location pendulum through the manual work and detain and realize the dropout, and the setting of dropout jar is detained the free end below at the location pendulum, can easily realize the dropout through the ejection of output and make the weight fall, and can detain the free end and increase the arm of force with the length of articulated department through increasing the location pendulum, thereby can be more relaxed dropout, do not need great dropout power, thereby reduce the power requirement of dropout jar, make overall structure have shorter reaction time, for example, set up the dropout jar into the hydraulic cylinder, change through the pressure of rivers in the discernment pipeline, introduce the hydraulic cylinder with rivers, thereby realize the automatic identification dropout, effectively improve overall structure's result of use. The tripping cylinder is associated with the contact switch, and the contact switch is pressed to enable the tripping cylinder to work.

The utility model is further arranged in that the tripping cylinder is provided with a liquid inlet and a liquid outlet which are communicated with each other, a stroke reversing valve is arranged between the liquid inlet and the contact switch, the stroke reversing valve comprises a base body, a first flow guide channel is formed on the base body, a reversing port is arranged on the base body, a second flow guide channel is formed by extending the reversing port into the base body, the reversing port is communicated with the first flow guide channel through the second flow guide channel, the reversing port is communicated with the liquid inlet, the contact switch is arranged at the front end of the first flow guide channel, the rear end of the contact switch is provided with a liquid guide joint, a limiting step is formed on the inner wall of the first flow guide channel, the second flow guide channel is arranged between the limiting step and the contact switch, one side of the limiting step close to the liquid guide joint is provided with a steel ball, and a reset spring is arranged between the steel ball, the contact switch and the steel ball are driven to form communication or interruption of the second flow guide channel and the first flow guide channel, and the liquid outlet is connected with a liquid outlet pipe to discharge liquid in the tripping cylinder.

The beneficial effect who so sets up is: adopt above-mentioned scheme, set the switching-over valve to this kind of form, through the slip of steel ball in first water conservancy diversion passageway, when the steel ball is not contradicted on spacing step, make first water conservancy diversion passageway and second water conservancy diversion passageway switch on, even make liquid can flow into second water conservancy diversion passageway through first water conservancy diversion passageway, realize that liquid gets into the tripping cylinder, thereby make the tripping cylinder output stretch out ejection location pendulum and detain, thereby realize the dropout, when the conflict switch does not receive the cam effect, the steel ball resets under reset spring's effect and contradicts on spacing step, thereby seal first water conservancy diversion passageway once more, thereby realize cutting off the action, make tripping cylinder pressure decline, make the output decline no longer contradict the location pendulum and detain. The structure is simple and easy to realize, can better sense and utilize the change of the flow velocity of the medium, and has better sensitivity.

The utility model discloses further set up to contact switch is including touching button and button seat, button seat and first water conservancy diversion passageway are pegged graft and are cooperated and switch on with first water conservancy diversion passageway, it slides and sets up on the button seat and to extending in the first water conservancy diversion passageway has the push rod to touch the button, and the push rod is contradicted through spacing step and is formed the transmission that pushes away button and steel ball on the steel ball.

The beneficial effect who so sets up is: adopt above-mentioned scheme, set contact switch to this kind of form, thereby the touch button can receive the cam conflict ejection steel ball for make first water conservancy diversion passageway and second water conservancy diversion passageway switch on, this kind of simple structure does benefit to the realization, has better result of use.

The utility model discloses further set up as be provided with the location seat in the level and smooth one side of cam on the mount table and form the direction to cam pivoted, be formed with the breach between cam and the positioning seat, be provided with the location pearl in the breach, still be provided with adjustment mechanism on the positioning seat, adjustment mechanism includes adjusting screw, regulation seat and adjusting spring, it sets up on the positioning seat lateral wall to adjust the seat, it leads to the groove to be provided with the regulation on the regulation seat, it passes the positioning seat setting to adjust to lead to the groove, adjusting screw sets up and leads to the groove one end near the regulation seat and join in marriage the festival with the regulation groove screw thread in the regulation, the setting of location pearl is adjusting the other end that leads to the groove, adjusting spring sets up and contradicts between adjusting screw and location pearl.

The beneficial effect who so sets up is: adopt above-mentioned scheme, set up the location pearl, improve rolling disc pivoted smoothness nature, be convenient for simultaneously observe the calibration, can set up the scale on the positioning seat as the preferred, can carry out rough reading to the medium velocity of flow through observing location pearl position, improve overall structure's result of use. Carry out ejection or relax adjusting spring to adjusting spring through rotating adjusting screw precession or screw-out, through compression or the contact force of relaxation spring control to the location pearl to adjust the degree that compresses tightly of rolling disc, thereby adjust the sensitivity of rolling disc to the impact of medium velocity of flow, through setting up simple structure like this, do benefit to the realization, and be convenient for adjust.

The utility model discloses further set up to the cam extends to be formed with the square shaft that resets to the mount table is outer, the square shaft that resets is last to be provided with and is used for rotating the spanner that resets to the cam.

The beneficial effect who so sets up is: by adopting the scheme, the cam can be quickly reset, and meanwhile, the cam resetting device is simple in structure, convenient to operate and capable of improving the using effect of the whole structure.

The utility model discloses further set up to be formed with the oscillating axle on the pendulum rod, the weight passes through the oscillating axle swing and sets up in the swing groove, it is provided with the location axle sleeve to correspond swing groove position in the frame, location axle sleeve cover is established and is formed the location of oscillating axle in the logical groove of swing outside the swing axle, frame bottom both sides are provided with the mounting hole, be provided with the installation axle on the driving piece, the driving piece passes through the installation axle and sets up in the mounting hole, the driving piece output is connected with the pendulum rod transmission and is formed the drive that lifts or fall to the weight, be provided with the installation axle sleeve in the mounting hole position in the frame, the installation axle sleeve cover is established and is formed the fixed of installation axle in the.

The beneficial effect who so sets up is: by adopting the scheme, when the heavy hammer is installed, the swing shaft on the swing rod is firstly placed into the swing groove, a gap exists between the swing groove and the swing shaft, the swing rod can be smoothly installed and enters the swing groove, the positioning shaft sleeve is sleeved from the other side of the swing groove, the swing shaft is sleeved, the gap between the swing shaft and the swing groove is filled, the positioning shaft sleeve is fixed with the positioning seat, and the installation is finished. This kind of simple structure does benefit to the realization, and is also very convenient when dismantling the debugging simultaneously, need not dismantle whole side board get off, can not influence the position of driving piece or weight, no longer need debug repeatedly, and it is more convenient when assembling once more.

Drawings

Fig. 1 is a schematic view of a connection structure according to an embodiment of the present invention;

fig. 2 is a side view of a frame in an embodiment of the present invention;

fig. 3 is a front sectional view of an installation table in an embodiment of the present invention;

FIG. 4 is a side view of an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a diverter valve in an embodiment of the present invention;

fig. 6 is a partial cross-sectional view of the front of the frame in an embodiment of the invention.

Detailed Description

As can be seen from fig. 1 to 6, a pipeline overspeed shutoff device is disclosed, which comprises a pipe body 1 and a frame 2, wherein the pipe body 1 is arranged at one side of the frame 2, a heavy hammer 4 is arranged on the frame 2 in a swinging manner to control the on-off of a medium in the pipe body 1, a swinging groove 21 is formed on the frame 2, the heavy hammer 4 is arranged on the swinging groove 21 in a swinging manner through a swinging rod 41, a driving member 8 for pushing the swinging rod 41 to enable the heavy hammer 4 to stand up for energy storage and conduct the pipe body is arranged at a position on the frame 2 corresponding to the swinging rod 41, the frame 2 is provided with a locking mechanism for locking and limiting the falling of the heavy hammer 4 after the heavy hammer 4 is lifted, a detection port is arranged on the side wall of the pipe body 1, a mounting table 3 is arranged on the detection port, the mounting table 3 is communicated with the pipe body 1 through the detection port, a cam 5 is rotatably arranged on, the rotating shaft 52 is arranged along the radial direction of the pipe body 1 and is rotatably connected with the mounting platform 3, a sensing plate 51 used for driving the cam 5 to rotate under the impact of a medium is fixedly arranged on the rotating shaft 52, the sensing plate 51 extends into the pipe body 1 through a detection port and is arranged towards the medium flow direction in the pipe body 1, the mounting platform 3 is further provided with a contact switch 9 used for unlocking the locking mechanism to enable the heavy hammer 4 to fall, and the contact switch 9 is arranged close to one side of the protrusion of the cam 5. The beneficial effect who so sets up is: set to this kind of form, here weight 4 rises or falls, it belongs to prior art to control valve way opens and closes, also common mechanical mechanism, it does not need to describe here more, the action of rising of weight 4 can adopt the cylinder, the hydro-cylinder, motor and other similar drive arrangement through the thick stick or the mode of lifting jack-up, the oil tank through inside setting can be passed through the manual pump and carries out the lifting for weight 4, also can set up branch road or oil circuit, thereby it makes driving piece 8 work to impress fluid, can set up flow control valve for example in the pipeline here, realize the control to driving piece 8 output. When the medium flow rate sudden change increases in body 1, can push up sensing board 51 swing to drive cam 5 and rotate, thereby quick feedback is on cam 5's scale, thereby effectively monitor the pipeline medium velocity of flow, and sensing board 51 here can be through changing the size of a dimension or the sensitivity that the atress was adjusted to the length that stretches into body 1, and the structure has longer life simultaneously, and is not fragile, and overall structure is also very simple, does benefit to production and processing. Meanwhile, after the cam 5 rotates, the protruding position can abut against the contact switch 9, so that the locking mechanism is controlled to be tripped, the heavy hammer 4 falls down, the valve path is closed, and the control is simple and quick.

The locking mechanism comprises a positioning pendulum buckle 6 and a positioning hook 61, the positioning pendulum buckle 6 is arranged on the frame 2 in a swinging mode through a connecting shaft, a positioning hole is formed in the frame 2 and is higher than the swinging groove 21, one end of the positioning pendulum buckle 6 is a free end, the other end of the positioning pendulum buckle is a positioning end and is provided with a barb, the positioning hook 61 is arranged on the swinging rod 41, and the positioning hook 61 is buckled with the barb to form positioning after the counterweight 4 is erected. The beneficial effect who so sets up is: by adopting the scheme, the heavy hammer 4 is enabled to stand through the driving part 8 to accumulate gravitational potential energy, the standing of the heavy hammer 4 does not exceed a critical line, no external force acts on the heavy hammer 4 and can fall back against the standing direction in the state, in the standing process, the positioning hook 61 on the swing rod 41 can be abutted against the barb, meanwhile, the positioning pendulum buckle 6 is enabled to deflect, the positioning hook 61 can fall into a hook groove of the barb to realize buckling, after the buckling is completed, the driving part 8 completes the work, at the moment, the heavy hammer 4 can strain the positioning pendulum buckle 6 under the action of self gravity, and the positioning pendulum buckle 6 is rotatably arranged on the rack 2, so that the heavy hammer 4 is pulled, the heavy hammer 4 can not fall, and the positioning of the heavy hammer 4 is completed. The locking device is simple in structure, capable of better locating the heavy hammer 4, quite convenient to lock and operate, capable of being released only by enabling the swinging piece to rotate in the releasing direction when unlocking is needed, beneficial to operation and realization and capable of improving the using effect of the whole structure.

The outer side surface of the barb is a smooth curved surface, and the outer side surface of the positioning hook 61 moves along the outer side surface of the barb in a radian manner to form the buckling of the positioning hook 61 and the barb. The beneficial effect who sets up like this is, adopts above-mentioned scheme, sets up to the rounding off curved surface, can be more smooth realization lock action, improves overall structure's result of use.

A tripping cylinder 62 for rotating the positioning swing buckle 6 towards a tripping direction is further arranged at a position corresponding to the free end of the positioning swing buckle 6 on the frame 2, and an output end of the tripping cylinder 62 is arranged along the height direction and is arranged below the free end of the positioning swing rod 41. The beneficial effect who so sets up is: adopt above-mentioned scheme, set up tripping cylinder 62, need not pull the location pendulum through the manual work and detain 6 realization threading backs, and tripping cylinder 62 output sets up and detains 6 free end below at the location pendulum, can easily realize threading backs through the ejection of output and make weight 4 fall down, and can detain 6 free end and articulated department's length through increasing the location pendulum and increase the arm of force, thereby can be more light thread back, do not need great threading force, thereby reduce tripping cylinder 62's power requirement, make overall structure have shorter reaction time, for example, set tripping cylinder 62 into the hydraulic cylinder, change through the pressure of rivers in the discernment pump valve, introduce the hydraulic cylinder with rivers, thereby realize the automatic identification threading, effectively improve overall structure's result of use. The tripping cylinder 62 is connected with the contact switch 9, and the contact switch 9 is pressed to enable the tripping cylinder 62 to work, so that the structure is simple and convenient to realize.

The trip cylinder 62 is provided with a liquid inlet and a liquid outlet which are communicated with each other, a stroke reversing valve 7 is arranged between the liquid inlet and the contact switch 9, the stroke reversing valve 7 comprises a base body 71, a first flow guide channel 72 is formed on the base body 71, a reversing port is arranged on the base body 71, a second flow guide channel 73 is formed by extending the reversing port into the base body 71, the reversing port is communicated with the first flow guide channel 72 through the second flow guide channel 73, the reversing port is communicated with the liquid inlet, the contact switch 9 is arranged at the front end of the first flow guide channel 72, a liquid guide joint 77 is arranged at the rear end, a limiting step 74 is formed on the inner wall of the first flow guide channel 72, the second flow guide channel 73 is arranged between the limiting step 74 and the contact switch 9, a steel ball 75 is arranged at one side of the limiting step 74 close to the liquid guide joint 77, a reset spring 76 is abutted between the steel ball 75 and the liquid guide joint 77, the contact switch 9 and the steel ball 75 are driven to form the communication or interruption of the second flow guide channel 73 and the first flow guide channel 72, and a liquid outlet pipe is connected to discharge liquid in the tripping cylinder 62. The beneficial effect who so sets up is: by adopting the scheme, the reversing valve is set to be in the form, through the sliding of the steel ball 75 in the first flow guide channel 72, when the steel ball 75 does not collide on the limiting step 74, the first flow guide channel 72 is communicated with the second flow guide channel 73, namely, liquid can flow into the second flow guide channel 73 through the first flow guide channel 72, the liquid can enter the tripping cylinder 62, so that the output end of the tripping cylinder 62 extends out of the ejection positioning swing buckle 6, and the tripping is realized, when the collision switch is not acted by the cam 5, the steel ball 75 resets and collides on the limiting step 74 under the action of the reset spring 76, so that the first flow guide channel 72 is closed again, the cutting action is realized, the pressure of the tripping cylinder 62 is reduced, and the output end is reduced and does not collide with the positioning swing buckle 6 any more. The structure is simple and easy to realize, can better sense and utilize the change of the flow velocity of the medium, and has better sensitivity.

The contact switch 9 includes a contact button 92 and a button seat 91, the button seat 91 is inserted into and matched with the first flow guiding channel 72 and is communicated with the first flow guiding channel 72, the contact button 92 is slidably disposed on the button seat 91 and extends into the first flow guiding channel 72 to form a push rod 93, and the push rod 93 abuts against the steel ball 75 through a limiting step 74 to form transmission between the push button and the steel ball 75. The beneficial effect who so sets up is: adopt above-mentioned scheme, set contact switch 9 to this kind of form, thereby touch button 92 can receive cam 5 to contradict ejection steel ball 75 for first water conservancy diversion passageway 72 switches on with second water conservancy diversion passageway 73, and this kind of simple structure does benefit to the realization, has better result of use.

Above-mentioned mount table 3 is provided with positioning seat 55 in the level and smooth one side of cam 5 and forms the direction to cam 5 pivoted, be formed with the breach between cam 5 and the positioning seat 55, be provided with location pearl 54 in the breach, still be provided with adjustment mechanism on the positioning seat 55, adjustment mechanism includes adjusting screw 57, adjusts seat 56 and adjusting spring, it sets up on the positioning seat 55 lateral wall to adjust seat 56, it leads to the groove to be provided with the regulation on adjusting seat 56, it passes positioning seat 55 and sets up to adjust to lead to the groove, adjusting screw 57 sets up and leads to the groove one end and cooperate the festival with the regulation and lead to the groove screw thread in adjusting the groove, location pearl 54 sets up the other end that leads to the groove in adjusting, adjusting spring sets up and leads to the groove in adjusting and contradicts between adjusting screw 57 and location pearl. The beneficial effect who so sets up is: adopt above-mentioned scheme, set up location pearl 54, improve cam pivoted smoothness nature, be convenient for simultaneously observe the calibration, can set up the scale as the preferred on positioning seat 55, can carry out rough reading to the medium velocity of flow through observing location pearl 54 positions, improve overall structure's result of use. The adjusting spring is pushed or loosened by screwing in or screwing out the adjusting screw 57, the contact force of the positioning ball 54 is controlled through compression or relaxation of the spring, so that the compression degree of the cam is adjusted, the sensitivity of the cam to medium flow velocity impact is adjusted, and the adjusting screw is simple in structure, beneficial to realization and convenient to adjust.

The cam 5 extends out of the mounting table 3 to form a reset square shaft 53, and a wrench for rotating and resetting the cam 5 is arranged on the reset square shaft 53. The beneficial effect who so sets up is: adopt above-mentioned scheme, can reset cam 5 fast, simple structure simultaneously, the operation of being convenient for improves overall structure's result of use.

The swing rod 41 is provided with a swing shaft 42, the heavy hammer 4 is arranged in the swing groove 21 through the swing shaft 42 in a swinging mode, the rack 2 is provided with a positioning shaft sleeve 22 corresponding to the position of the swing groove 21, the positioning shaft sleeve 22 is sleeved on the swing shaft 42 to form the positioning of the swing shaft 42 in the swing through groove, two sides of the bottom of the rack 2 are provided with mounting holes, the driving piece 8 is provided with a mounting shaft, the driving piece 8 is arranged in the mounting holes through the mounting shaft, the output end of the driving piece 8 is in transmission connection with the swing rod 41 to form the driving of lifting or falling of the heavy hammer 4, the rack 2 is provided with a mounting shaft sleeve 23 at the position of the mounting hole, and the mounting shaft sleeve 23 is sleeved on the mounting shaft to form the. The beneficial effect who so sets up is: by adopting the scheme, when the heavy hammer 4 is installed, the swinging shaft 42 on the swinging rod 41 is firstly placed into the swinging groove 21, a gap is formed between the swinging groove 21 and the swinging shaft 42, so that the swinging rod 41 can be smoothly installed and enter the swinging groove 21, the positioning shaft sleeve 22 is sleeved on the other side of the swinging groove 21 to sleeve the swinging shaft 42, the gap between the swinging shaft 42 and the swinging groove 21 is filled, the positioning shaft sleeve 22 is fixed with the positioning seat 55, and the installation is finished, when the driving piece 8 is installed, the installation shaft on the driving piece 8 is firstly arranged in the installation hole, a gap is formed between the installation hole and the installation shaft, the driving part 8 can be smoothly installed and enter the installation hole, the installation shaft sleeve 23 is sleeved from the other side of the installation hole, the installation shaft is sleeved, a gap between the installation shaft and the installation hole is filled, and the installation shaft sleeve 23 is fixed with the positioning seat 55, so that installation is completed. This kind of simple structure does benefit to the realization, and is also very convenient when dismantling the debugging simultaneously, need not dismantle whole side board get off, can not influence driving piece 8 or weight 4's position, no longer need debug repeatedly, and it is more convenient when assembling once more.

Now, the working flow of the device is briefly introduced according to fig. 1, when the whole pipeline needs to be opened, the first cut-off valve 101 can be closed in a manual valve opening mode, the driving part 8, that is, the oil cylinder, cuts off a communicated oil path, at this time, the oil cylinder can be a double-acting cylinder, by shaking the manual pump 12, hydraulic oil enters the rodless cavity of the oil cylinder through the first one-way valve 141 and the second one-way valve 142, the piston is pushed to lift the heavy hammer 4, so as to control the valve in the pipeline to be opened, the hydraulic oil in the rod cavity of the oil cylinder returns to the oil tank 15 through the first three-way ball valve 111, when the valve is completely opened, the first cut-off valve 101 is opened, the rod cavity and the rodless cavity of the oil cylinder are both communicated to the oil tank 15, the oil cylinder can be converted into a single-acting slow-closing cylinder, at this time, the; the valve can also be opened through an external oil source, through opening the second stop valve 102, thereby leading an external oil source oil inlet pipe to be communicated with a rodless cavity of the oil cylinder, switching the state of the first three-way ball valve 111 to the external oil source, leading the external oil source oil return pipe to be communicated with a rod cavity of the oil cylinder, and leading the external oil source to be communicated, thereby realizing the valve opening, when the valve is completely opened, closing the second stop valve 102, switching the first three-way ball valve 111 to a manual valve opening state, opening the first stop valve 101, leading the rod cavity and the rodless cavity of the oil cylinder to be communicated to the oil tank 15, converting the oil cylinder function into a single-action slow-closing cylinder, leading the heavy hammer 4 to have the tendency of falling, but limiting the falling of the heavy hammer 4 through the positioning swing. When the pipeline normally works, the pressure storage tank 13 can store pressure, the third stop valve 103 is opened, and the pressure medium in the pipe body 1 is stored in the pressure storage tank 13 through the third stop valve 103, the filter 16 and the third one-way valve 143, so that the pressure of the compressed air is stored, and when the pipe body pressure fluctuates, the pressure in the pressure storage tank 13 is always kept at the high level of the pipe body pressure; when the flow rate in the pipe body 1 exceeds a preset threshold value, the sensing plate 51 swings under the pushing of a medium, so that the cam 5 is driven to push the reversing valve 7 to reverse, pressure water in the pressure storage tank 13 enters a rodless cavity of the tripping cylinder 62 through the reversing valve 7 to push the piston, so that the positioning swing buckle 6 is pushed to trip the heavy hammer 4, the heavy hammer falls down, and the valve of the pipe body 1 is closed, wherein the closing speed of the valve can be controlled through the first flow control valve 171, when the valve is closed to a certain angle position, a stroke control rod in the oil cylinder cuts off an oil path, the closing valve enters a slow closing state, hydraulic oil in the oil cylinder continues to return oil through the second flow control valve 172, so that the valve is slowly closed, the water hammer in the pipe body 1 is eliminated, and the slow closing time can be adjusted through the second; after the pipeline is closed, the operation of resetting to tripping cylinder 62 needs to be carried out, through opening fifth stop valve 105, rotate second three-way ball valve 112 to tripping cylinder reset state, the pressurized water in pressure storage tank 13 enters tripping cylinder 62 through second three-way ball valve 112 and has the pole chamber, no pole chamber passes through fifth stop valve 105 drainage, tripping cylinder 62 piston is retracted under hydraulic effect and is reset, after the action of resetting is accomplished, with fifth stop valve 105, thereby connect second three-way ball valve 112 to tripping cylinder 62 normal condition, if there is not pressure in pressure storage tank 13 and the penstock, can carry out mechanical reset through the mode of pressing down location pendulum knot 6. When the valve needs to be manually closed, the fourth stop valve 104 is manually opened, and the pressure water in the pipe body enters the rodless cavity of the tripping cylinder 62 through the fourth stop valve 104 to push the piston, so that the lock is released, the heavy hammer 4 falls down, and the valve is closed.

The above-mentioned embodiments are only preferred embodiments of the present invention, and the scope of the present invention is not limited thereto, so that the equivalent changes made in the claims of the present invention, such as equivalent products with similar processes and similar structures, are also included in the scope of the present invention.

Claims

1. The utility model provides a pipeline overspeed turn-off device, includes body and frame, the body sets up in one side of frame, the swing is provided with the weight in the frame and forms the control to medium break-make in the body, be formed with the swing groove in the frame, the weight passes through the pendulum rod swing and sets up on the swing groove, be provided with the driving piece that is used for pushing away the pendulum rod and makes the weight stand the energy storage and switch on the body, its characterized in that corresponding pendulum rod position in the frame: the frame is provided with and is used for locking the locking mechanical system who restricts the weight whereabouts after the weight rises, be provided with the detection mouth on the body lateral wall, be provided with the mount table on the detection mouth, the mount table switches on with the body through detecting the mouth, it is provided with the cam to rotate on the mount table lateral wall, the cam has the axis of rotation to extend to in the mount table, the axis of rotation radially sets up and is connected with the mount table with the rotation along the body, fixed being provided with in the axis of rotation is used for receiving medium impact to drive cam pivoted sense board, the sense board extends and sets up towards medium flow direction in the body in to the body through detecting the mouth, the mount table still is provided with the contact switch that is used for the unblock locking mechanical system to make the weight whereabouts, the.

2. The pipe overspeed shutoff device of claim 1, wherein: the locking mechanism comprises a positioning pendulum buckle and a positioning hook, the positioning pendulum buckle is arranged on the rack in a swinging mode through a connecting shaft and forms a positioning hole in the rack, the positioning hole is higher than the swinging groove in position, one end of the positioning pendulum buckle is a free end, the other end of the positioning pendulum buckle is a positioning end and is provided with a barb, the positioning hook is arranged on the swinging rod, and the positioning hook and the barb are buckled to form positioning after the counterweight is erected.

3. The pipe overspeed shutoff device of claim 2, wherein: the outer side surface of the barb is a smooth curved surface, and the outer side surface of the positioning hook moves along the outer side surface of the barb in a radian manner to form the buckling of the positioning hook and the barb.

4. Pipe overspeed switching device according to claim 1, 2 or 3, characterized in that: and a tripping cylinder for enabling the positioning swing buckle to rotate towards a tripping direction is further arranged at a position corresponding to the free end of the positioning swing buckle on the rack, and the output end of the tripping cylinder is arranged along the height direction and is arranged below the free end of the positioning swing rod.

5. The pipe overspeed shutoff device of claim 4, wherein: the tripping cylinder is provided with a liquid inlet and a liquid outlet which are communicated with each other, a stroke reversing valve is arranged between the liquid inlet and the contact switch, the stroke reversing valve comprises a base body, a first flow guide channel is formed on the base body, a reversing port is arranged on the base body, a second flow guide channel is formed by extending the reversing port inwards to the base body, the reversing port is communicated with the first flow guide channel through the second flow guide channel, the reversing port is communicated with the liquid inlet, the contact switch is arranged at the front end of the first flow guide channel, a liquid guide joint is arranged at the rear end of the first flow guide channel, a limiting step is formed on the inner wall of the first flow guide channel, the second flow guide channel is arranged between the limiting step and the contact switch, a steel ball is arranged at one side of the limiting step close to the liquid guide joint, a reset spring is arranged between the steel ball and the liquid guide joint in a butting mode, the contact switch and the steel ball are driven to form communication or interruption of the second flow guide channel and the first flow guide channel, and the liquid outlet is connected with a liquid outlet pipe to discharge liquid in the tripping cylinder.

6. The pipe overspeed shutoff device of claim 5, wherein: the contact switch comprises a contact button and a button seat, the button seat is in splicing fit with the first flow guide channel and is communicated with the first flow guide channel, the contact button is arranged on the button seat in a sliding mode and extends into the first flow guide channel to form a push rod, and the push rod abuts against the steel ball through a limiting step to form transmission of the push button and the steel ball.

7. The pipe overspeed shutoff device of claim 1, wherein: the utility model discloses a cam positioning device, including the mount table, be provided with the locating seat on the mount table in the level and smooth one side of cam and form the direction to cam pivoted, be formed with the breach between cam and the locating seat, be provided with the location pearl in the breach, still be provided with adjustment mechanism on the locating seat, adjustment mechanism includes adjusting screw, adjusts seat and regulating spring, adjust the seat setting on the locating seat lateral wall, it leads to the groove to be provided with the regulation on the regulation seat, adjust and lead to the groove and pass the locating seat setting, adjusting screw sets up and leads to the groove one end near the regulation seat and join in marriage the festival with the regulation groove screw thread at the regulation, the location pearl sets up the other end in adjusting the groove, regulating spring sets up and leads to the.

8. The pipe overspeed shutoff device of claim 7, wherein: the cam extends outward to the mount table and is formed with the square shaft that resets, be provided with the spanner that is used for rotating the reset to the cam on the square shaft that resets.

9. The pipe overspeed shutoff device of claim 1, wherein: the swing rod is provided with a swing shaft, the heavy hammer is arranged in the swing groove through the swing of the swing shaft, a positioning shaft sleeve is arranged on the rack corresponding to the position of the swing groove, the positioning shaft sleeve is sleeved outside the swing shaft to form the positioning of the swing shaft in the swing through groove, mounting holes are formed in two sides of the bottom of the rack, a mounting shaft is arranged on the driving piece, the driving piece is arranged in the mounting hole through the mounting shaft, the output end of the driving piece is in transmission connection with the swing rod to form the driving for the lifting or falling of the heavy hammer, a mounting shaft sleeve is arranged on the rack at the position of the mounting hole, and the mounting shaft sleeve is sleeved on the mounting shaft to form.