CN212868606U - Cutting-off component for overpressure automatic cutting-off pressure regulator - Google Patents

Abstract

The utility model discloses an superpressure automatic cutout regulator is with cutting off parts relates to the transmission and distribution and send gas equipment to make technical field. The utility model comprises a cam cover, a cam shaft, a cutting device and a rocker arm component, wherein the rocker arm component comprises a rocker arm, an installation shaft, a roller and an impact block, the middle part of the rocker arm is installed in the cam cover through the installation shaft, and the rocker arm can rotate around the axis of the installation shaft under the action of the installation shaft; the roller is installed in the upper end of the rocker arm, the impact block is arranged at the lower end of the rocker arm, after the cut-off valve rod of the cut-off device is released, the cut-off valve rod impacts the impact block under the action of the reset spring, the roller is separated from the cam shaft limiting block, and the locking of the cam shaft is released. The utility model discloses having revised rocker arm assembly's fixed mounting mode, also having changed the transmission mode who cuts off between valve rod and the rocker arm assembly simultaneously, utilizing to cut off the valve rod and move striking rocker arm assembly left fast, changed conventional torque transmission mode, no middle torque transmission, consequently transmission torque loss is little, cuts off the precision and improves greatly.

Description

Cutting-off component for overpressure automatic cutting-off pressure regulator

Technical Field

The utility model relates to a defeated distribution send gas equipment to make technical field, more specifically says and relates to an superpressure automatic cutout regulator is with cutting off parts.

Background

In recent years, with the rapid development of national economy of China, the requirements on fluid transportation and distribution equipment are higher and higher, and particularly with the rapid development of natural gas industry and urban gas utilization of China, the requirements on transportation and distribution equipment in the technical field of gas transportation and distribution are higher, and the requirements on the safety of the equipment are higher. We know that: the gas pipeline network for transportation and distribution is a system project integrating storage, transportation and distribution, peak regulation and pressure regulation and security equipment. And the key for maintaining the safe operation of the pipe network is as follows: firstly, the pressure of the delivered gas can be accurately regulated and controlled in time, and the pressure can be stably kept within a set allowable range; secondly, a protection function of overpressure cut-off is required. To achieve the above objectives, there are two measures adopted by most gas companies: one is to install pressure regulating valve and overpressure stop valve on the transmission and distribution pipeline to realize the safety protection function of peak regulation and pressure regulation and overpressure cut-off; another method is to install an overpressure cut-off pressure regulator which combines the functions of automatic pressure regulation and overpressure cut-off and is proposed by the inventor on a transmission and distribution pipeline, and the patent number is ZL 200820223426.3. Obviously, the overpressure cut-off pressure regulator integrating the automatic pressure regulation function and the overpressure cut-off function is more convenient and advanced than the pressure regulating valve and the cut-off valve of the former structure, and has certain function of preventing false operation.

The overpressure cut-off regulator integrates the functions of automatic pressure regulation and overpressure cut-off into a whole and comprises a pressure regulating device and a cut-off device, wherein the pressure regulating device comprises a lower cover, a valve body, a pressure regulating valve seat component, a valve rod, a valve port, a cut-off valve seat component, a cut-off spring, a lower membrane cover, a main regulating membrane, an upper membrane cover, an outlet pressure regulating spring, a regulating rod, a regulating cylinder, a cam and a pressure regulating signal pipe, and the cut-off device comprises a square frame, a membrane shaft, a cut-off lower cover, a cut-off upper cover, a cut-off membrane component, a cut-off regulating spring seat, a seal cover, a cam shaft, a cut-off signal pipe and a positioning steel ball, a. The working principle is that when the gas transmission pressure in the pipe network fluctuates within a set allowable range, a fluctuation gas source is led into a pressure regulating membrane cavity formed by an upper membrane cover and a lower membrane cover by a pressure regulating signal pipe and acts on a main regulating membrane, and the distance between a pressure regulating valve seat component and a valve port is regulated by a valve rod, so that the peak regulating and pressure regulating effects are achieved; when the overpressure of the gas transmission pressure occurs, the overpressure gas source is led into a cutting diaphragm cavity formed by a cutting lower cover and a cutting upper cover by a cutting signal pipe and acts on the cutting diaphragm component, the cutting diaphragm pushes a lock rod steel ball tray to move axially along a diaphragm shaft, due to the axial movement of the tray, the lock rod steel ball can slide into a large-hole cavity in the tray to unlock the diaphragm shaft, at the moment, a reset spring pushes a limit shaft sleeve to move axially and pushes a positioning steel ball to deviate from the position of the lock shaft steel ball, the lock shaft steel ball loses the blockage and slides downwards to unlock a cam shaft to rotate, at the moment, the cutting spring loses the support of a cam and pushes the cutting valve seat component to move downwards to close a valve port so as to close the gas source, and the purpose of cutting is achieved. From the above structure and working principle, the structure of the existing overpressure cut-off pressure regulator is very complex, especially the structure of a part of the cut-off valve for realizing the automatic cut-off function, and meanwhile, after the air source is cut off and closed, when the valve port is opened to realize the re-air transmission, the steel ball of the lock rod must be reset back to the tray, and the operation of the reset process is very inconvenient.

Also for example, the invention patent with publication number CN106382408A, 2/8/2017, entitled "overpressure and decompression cut-off type pressure regulator" is composed of a main valve, a pressure regulating membrane box, a commander, a cut-off controller and a group of signal pipes, and has the structural characteristics that: the main valve air inlet cavity is internally provided with a cut-off actuating mechanism which consists of a cut-off valve core, a guide post and a cut-off spring and is controlled by a cut-off controller. The cut-off controller comprises a cut-off diaphragm capsule acted by an overpressure decompression signal, a control mechanism acted by an overpressure spring and a decompression spring and a transmission mechanism, and when the output air pressure exceeds or is lower than a set pressure value, a cut-off control shaft of the transmission mechanism is tripped, and then the cut-off valve core is pushed by the cut-off spring to move upwards to close the bottom end face of the valve seat so as to quickly cut off an air source for safety protection.

The cutting-off components of the pressure regulator in the prior art are influenced by the friction coefficient due to the fact that the transmission mechanisms are mutually connected when the pressure regulator is cut off emergently, and the closing precision and the performance of the cutting-off valve are influenced.

SUMMERY OF THE UTILITY MODEL

In order to overcome the defect and not enough that exist among the above-mentioned prior art, the utility model provides an superpressure is automatic cuts off parts that cuts off for regulator, the utility model discloses an invention aim at solve among the prior art voltage regulator with cut off parts structure complicated, drive mechanism receive coefficient of friction influence, close the problem that precision and performance all received the influence. The utility model discloses having revised rocker arm assembly's fixed mounting mode, also having changed the transmission mode who cuts off between valve rod and the rocker arm assembly simultaneously, utilizing to cut off the valve rod and move striking rocker arm assembly left fast, changed conventional torque transmission mode, no middle torque transmission, consequently transmission torque loss is little, cuts off the precision and improves greatly.

In order to solve the problems existing in the prior art, the utility model discloses a realize through following technical scheme:

a kind of superpressure cuts off the cut-off part for pressure regulator automatically, including cam cover, camshaft and cut-off device used for releasing the locking state of the camshaft, characterized by that: the cam cover is characterized by further comprising a rocker arm assembly, wherein the rocker arm assembly comprises a rocker arm, a mounting shaft, a roller and an impact block, the middle part of the rocker arm is mounted in the cam cover through the mounting shaft, and the rocker arm can rotate around the axis of the mounting shaft under the action of the mounting shaft; the gyro wheel is installed in rocking arm upper end, with the cooperation of spacing piece on the camshaft in order to lock the camshaft, striking piece sets up at the rocking arm lower extreme, and corresponds with cutting off device's cutting off the valve rod, and after cutting off device's the valve rod that cuts off released, the valve rod striking piece is cut off under the reset spring effect, and the gyro wheel breaks away from with the camshaft spacing piece, removes the locking of camshaft.

The mounting shaft is sleeved with a torsional spring for resetting the rocker arm.

The installation axle fixed mounting passes through the bearing with the installation axle and is connected in the cam cap, and the bearing is connected with installation axle interference fit or key-type in the middle part of the rocking arm, and the bearing is connected with installation axle interference fit or key-type.

The two ends of the mounting shaft are mounted in the cam cover through bearings, and the middle of the rocker arm and the mounting shaft are fixed through interference fit or key connection.

The roller is a bearing.

The cutting device comprises a cutting lower cover connected with the cam cover, a cutting upper cover provided with a sealing cover, a cutting diaphragm assembled in the cutting upper cover, a cutting spring seat, a cutting adjusting spring, a cutting tray internally provided with a locking rod steel ball and a cutting valve rod, wherein a limiting sleeve supported by a return spring is installed on the cutting valve rod, a screwed pipe joint used for connecting a cutting signal pipe is arranged on the cutting lower cover, and the screwed pipe joint is used for communicating an air cavity of the cutting lower cover with the cutting signal pipe.

And a cam supporting the cut-off valve clack is arranged on the cam shaft.

It works as follows: firstly, adjusting and setting the pre-pressure of a cutting and adjusting spring support against a cutting tray, which is the key for identifying the pressure fluctuation and overpressure of gas transmission, wherein when the pressure of the transmitted gas is in a normal working state, the pre-pressure support of the cutting and adjusting spring supports against the cutting tray, a locking rod steel ball in the cutting tray is pushed to a position of a small hole cavity of the cutting tray, and a locking steel ball locks a cutting valve rod; at the moment, the rocker arm is in a vertical state, and the roller at the upper end of the rocker arm is matched with the limiting block of the camshaft to lock the camshaft and prevent the camshaft from rotating; at the moment, the cam arranged on the cam shaft supports the cutting valve clack assembled on the main valve rod to prevent the cutting valve clack from moving downwards, so that the valve port in the valve body is opened smoothly; the end part of the cut-off valve rod is far away from the impact block at the lower end of the rocker arm, when the air pressure fluctuates, the pressure regulating signal pipe guides the fluctuating air source into the pressure regulating air cavity of the pressure regulating cavity, the pressure regulating diaphragm senses the pressure change of the fluctuating air source, and the main valve rod connected with the pressure regulating diaphragm is driven to move up and down under the combined action of the pressure regulating shaft sleeved with the pressure regulating spring, so that the opening degree of the pressure regulating valve clack and the valve port arranged on the main valve rod is regulated, and the aim of regulating the air transmission pressure by the damping of the pressure regulating valve clack to the valve port.

When the air pressure in the air outlet pipe is over-pressure, the over-pressure air source is led into the air cavity of the cut-off lower cover by the cut-off signal pipe, the cut-off diaphragm senses the pressure of the over-pressure air source to deform and push the cut-off tray to overcome the pre-pressure of the cut-off regulating spring and move along the axial direction of the cut-off valve rod, at this time, the locking rod steel ball slides into the large hole cavity of the cut-off tray to unlock the cut-off valve rod, the cut-off valve rod provided with the limiting sleeve can be pushed by the reset spring to move leftwards, the limiting sleeve impacts the impact block at the lower end of the rocker arm, the rocker arm which is impacted rotates along the pointer, the impact moves leftwards, the roller at the upper end moves rightwards, the roller drops the limiting block of the cam shaft to unlock the cam shaft and rotates, at this time, the cut, the purpose of 'overpressure cut-off' is achieved.

When the gas transmission pressure in the transmission and distribution pipeline returns to normal pressure and needs to be locked again, the sealing cover is opened, the cut-off valve rod is pulled back leftwards, the lock rod steel ball locks the cut-off valve rod again, the cam shaft is slowly rotated after the cut-off valve clack is pulled back, the cam supports the cut-off valve clack again, the rocker arm automatically resets under the action of the torsion spring and is matched with the limiting block on the cam shaft, and the cam shaft is locked again, so that the operation and the use are very simple and convenient.

Compared with the prior art, the utility model discloses profitable technological effect who brings shows:

1. the utility model discloses having revised rocker arm assembly's fixed mounting mode, also having changed the transmission mode who cuts off between valve rod and the rocker arm assembly simultaneously, utilizing to cut off the valve rod and move striking rocker arm assembly left fast, changed conventional torque transmission mode, no middle torque transmission, consequently transmission torque loss is little, cuts off the precision and improves greatly.

2. When pressure in the control pipeline exceeds set pressure, a pressure signal is transmitted to a cutting diaphragm through a cutting signal pipe to overcome acting force of a cutting adjusting spring to move rightwards, so that the cutting tray is driven to move rightwards, the small diameter of the cutting tray is changed into a large diameter in positioning of the outer circle of a locking rod steel ball, the locking rod steel ball moves towards the outer diameter direction, the cutting valve rod loses positioning of the locking rod steel ball, the cutting valve rod moves leftwards fast to impact a rocker arm assembly under the action of a reset spring, the rocker arm assembly overcomes clockwise rotation under the action of a torsion spring, a cam shaft rotates clockwise, a main shaft in a pressure regulator cuts off the valve rod and moves downwards with a cutting valve clack, and overpressure is. The utility model discloses the utilization is cut off the quick leftward movement striking rocking arm subassembly of valve rod, has changed conventional torque transmission mode, and no middle torque transmission, consequently the transmission torque loss is little, consequently cuts off the precision and improves greatly.

3. The utility model discloses set up the torsional spring on the installation axle, be favorable to the automatic re-setting of rocking arm, and under the torsional spring effect, the rocking arm can not take place the rotation, avoids the emergence of the mistake condition of cutting off. The utility model discloses in, adopt the bearing contact, reduce frictional force, the action is sensitive.

Drawings

FIG. 1 is a schematic sectional view of the cutting part of the present invention;

FIG. 2 is a schematic sectional view of the cutting part A-A of the present invention;

FIG. 3 is a schematic perspective view of the cutting member of the present invention;

fig. 4 is a schematic structural diagram of the voltage regulator of the present invention;

reference numerals: 1. cam, 2, cam cover, 3, camshaft, 4, cutting device, 5, rocker arm, 6, mounting shaft, 7, roller, 8, impact block, 9, limit block, 10, torsion spring, 11, cutting lower cover, 12, sealing cover, 13, cutting upper cover, 14, cutting diaphragm, 15, cutting spring seat, 16, cutting adjusting spring, 17, locking rod steel ball, 18, cutting tray, 19, cutting valve rod, 20, reset spring, 21, limit sleeve, 22, solenoid joint, 23, cutting signal pipe, 24, air cavity, 25, main valve rod, 26, cutting valve flap, 27, pressure adjusting signal pipe, 28, pressure adjusting cavity, 29, pressure adjusting air cavity, 30, pressure adjusting film, 31, pressure adjusting spring, 32, pressure adjusting shaft, 33, pressure adjusting valve flap, 34, valve port, 35 and cutting valve flap spring.

Detailed Description

The technical solution of the present invention is further elaborated in detail with reference to the drawings attached to the specification.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the present invention provides a cutting component for overpressure automatic cut-off pressure regulator, which changes the conventional torque transmission mode by using the rapid leftward movement of the cutting valve rod 19 to impact the rocker arm assembly. The cutting-off component comprises a cam cover 2, a camshaft 3 and a cutting-off device 4 for releasing the locking state of the camshaft 3, and further comprises a rocker arm assembly, wherein the rocker arm assembly comprises a rocker arm 5, a mounting shaft 6, a roller 7 and a striking block 8, the middle part of the rocker arm 5 is mounted in the cam cover 2 through the mounting shaft 6, and the rocker arm 5 can rotate around the axis of the mounting shaft 6 under the action of the mounting shaft 6; roller 7 is installed in 5 upper ends of rocking arm, cooperates with spacing piece 9 on camshaft 3 in order to lock camshaft 3, striking piece 8 sets up at 5 lower extremes of rocking arm, and corresponds with cutting off valve rod 19 of cutting device 4, and after cutting off valve rod 19 of cutting device 4 released, cutting off valve rod 19 striking piece 8 under reset spring 20 effect, roller 7 and 3 spacing piece 9 of camshaft break away from, relieve camshaft 3's locking. A torsion spring 10 for resetting the rocker arm 5 is sleeved on the mounting shaft 6. The installation axle 6 fixed mounting is in cam cap 2, and 5 middle parts of rocking arm are connected through the bearing with installation axle 6, and the bearing is connected with 5 middle parts of rocking arm interference fit or key-type, bearing and 6 interference fit or key-type of installation axle. The two ends of the mounting shaft 6 are mounted in the cam cover 2 through bearings, and the middle part of the rocker arm 5 and the mounting shaft 6 are fixed through interference fit or key connection. The roller 7 is a bearing. The cutting device 4 comprises a lower cutting cover 11 connected with the cam cover 2, an upper cutting cover 13 provided with a sealing cover 12, a cutting diaphragm 14 assembled in the upper cutting cover 13, a cutting spring seat 15, a cutting adjusting spring 16, a cutting tray 18 internally provided with a locking rod steel ball 17 and a cutting valve rod 19, wherein a limiting sleeve 21 supported by a return spring 20 is installed on the cutting valve rod 19, a solenoid joint 22 for connecting a cutting signal pipe 23 is arranged on the lower cutting cover 11, and the solenoid joint 22 is used for communicating an air cavity 24 of the lower cutting cover 11 with the cutting signal pipe 23. The camshaft 3 is provided with a cam 1 that supports the cutoff valve flap 26.

It works as follows: firstly, adjusting and setting the pre-pressure of a cutting adjusting spring 16 supporting and propping against a cutting tray 18, which is the key for identifying the pressure fluctuation and overpressure of gas transmission, when the pressure of the transmitted gas is in a normal working state, the pre-pressure of the cutting adjusting spring 16 supporting and propping against the cutting tray 18, a locking rod steel ball 17 in the cutting tray 18 is pushed to a position of a small hole cavity of the cutting tray 18, and the locking steel ball locks a cutting valve rod 19; at the moment, the rocker arm 5 is in a vertical state, and the roller 7 at the upper end of the rocker arm 5 is matched with the limiting block 9 of the camshaft 3 to lock the camshaft 3 and prevent the camshaft 3 from rotating; at this time, the cam 1 mounted on the camshaft 3 holds the cut-off valve flap 26 fitted on the main valve rod 25, preventing the cut-off valve flap 26 from moving downward, opening the valve port 34 in the valve body; at this time, the end of the cut-off valve rod 19 is far away from the impact block 8 at the lower end of the rocker arm 5; when the air pressure fluctuates, the pressure regulating signal pipe 27 guides the fluctuating air source into the pressure regulating air cavity 29 of the pressure regulating cavity 28, the pressure regulating diaphragm 30 senses the pressure change of the fluctuating air source, and under the combined action of the pressure regulating shaft 32 sleeved with the pressure regulating spring 31, the main valve rod 25 connected with the pressure regulating diaphragm 30 is driven to move up and down, so that the opening degree of the pressure regulating valve clack 33 and the valve port 34 arranged on the main valve rod 25 is regulated, and the damping of the valve port 34 by the pressure regulating valve clack 33 can be changed to realize the purpose of regulating the air transmission pressure. When the air pressure in the air outlet pipe has overpressure, an overpressure air source is introduced into an air cavity 24 of the cut-off lower cover 11 through a cut-off signal pipe 23, a cut-off tray 18 is pushed to overcome the pre-pressure of a cut-off adjusting spring 16 to move axially along a cut-off valve rod 19 due to the fact that a cut-off diaphragm 14 senses the pressure of the overpressure air source to deform, then a lock rod steel ball 17 slides into a large hole cavity of the cut-off tray 18 to unlock the cut-off valve rod 19, the cut-off valve rod 19 provided with a limiting sleeve 21 can be pushed by a return spring 20 to move leftwards, the limiting sleeve 21 impacts a striking block 8 at the lower end of a rocker arm 5, the rocker arm 5 which is impacted rotates along a pointer to quickly move leftwards, a roller 7 at the upper end moves rightwards, the roller 7 falls off a limiting block 9 of a camshaft 3 to unlock the camshaft 3 to rotate, at the time, a cut-off valve clack 26 arranged on a main valve rod 25 loses The air source is closed immediately, and the purpose of 'overpressure cut-off' is achieved. When the gas transmission pressure in the transmission and distribution pipeline returns to normal pressure and needs to be locked again, the sealing cover 12 is opened, the cut-off valve rod 19 is pulled back leftwards, the lock rod steel ball 17 locks the cut-off valve rod 19 again, the cam shaft 3 is slowly rotated after the cut-off valve clack 26 is pulled back, the cam 1 supports the cut-off valve clack 26 again, the rocker arm 5 automatically resets under the action of the torsion spring 10, is matched with the limiting block 9 on the cam shaft 3, and locks the cam shaft 3 again, so that the operation and the use are very simple and convenient.

Claims (7)

1. A kind of superpressure cuts off the cut-off part for pressure regulator automatically, including cam cap (2), camshaft (3) and cut-off unit (4) used for releasing the locking state of camshaft (3), characterized by that: the cam cover is characterized by further comprising a rocker arm assembly, wherein the rocker arm assembly comprises a rocker arm (5), a mounting shaft (6), a roller (7) and a collision block (8), the middle part of the rocker arm (5) is mounted in the cam cover (2) through the mounting shaft (6), and the rocker arm (5) can rotate around the axis of the mounting shaft (6) under the action of the mounting shaft (6); roller (7) are installed in rocking arm (5) upper end, and spacing piece (9) cooperation is in order to lock camshaft (3) on camshaft (3), striking piece (8) set up in rocking arm (5) lower extreme, and correspond with cutting off valve rod (19) of cutting device (4), and after cutting off valve rod (19) release of cutting device (4), cut off valve rod (19) striking piece (8) under reset spring (20) effect, and roller (7) break away from with camshaft (3) spacing piece (9), relieve the locking of camshaft (3).

2. The cutoff member for an over-pressure automatic cutoff pressure regulator according to claim 1, wherein: a torsion spring (10) for resetting the rocker arm (5) is sleeved on the mounting shaft (6).

3. The cutoff member for an overpressure automatic cutoff pressure regulator as claimed in claim 1 or 2, wherein: the installation axle (6) fixed mounting is in cam cap (2), and rocking arm (5) middle part is connected through the bearing with installation axle (6), and bearing and rocking arm (5) middle part interference fit or key-type connection, bearing and installation axle (6) interference fit or key-type connection.

4. The cutoff member for an overpressure automatic cutoff pressure regulator as claimed in claim 1 or 2, wherein: the two ends of the mounting shaft (6) are mounted in the cam cover (2) through bearings, and the middle of the rocker arm (5) is fixed with the mounting shaft (6) through interference fit or key connection.

5. The cutoff member for an overpressure automatic cutoff pressure regulator as claimed in claim 1 or 2, wherein: the roller (7) is a bearing.

6. The cutoff member for an over-pressure automatic cutoff pressure regulator according to claim 1, wherein: the cutting device (4) comprises a cutting lower cover (11) connected with the cam cover (2), a cutting upper cover (13) provided with a sealing cover (12), a cutting diaphragm (14) assembled in the cutting upper cover (13), a cutting spring seat (15), a cutting adjusting spring (16), a cutting tray (18) internally provided with a locking rod steel ball (17) and a cutting valve rod (19), wherein a limiting sleeve (21) supported by a return spring (20) is installed on the cutting valve rod (19), a solenoid joint (22) used for connecting a cutting signal pipe (23) is arranged on the cutting lower cover (11), and the solenoid joint (22) is used for communicating an air cavity (24) of the cutting lower cover (11) with the cutting signal pipe (23).

7. The cutoff member for an over-pressure automatic cutoff pressure regulator according to claim 1, 2 or 6, wherein: the camshaft (3) is provided with a cam (1) supporting the cut-off valve clack (26).

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