CN111720593B

CN111720593B - Multifunctional check valve

Info

Publication number: CN111720593B
Application number: CN202010578369.6A
Authority: CN
Inventors: 武芳; 李辉; 洪德朋
Original assignee: Cambridge Valve Group Co ltd
Current assignee: Cambridge Valve Group Co.,Ltd.
Priority date: 2020-06-23
Filing date: 2020-06-23
Publication date: 2022-01-04
Anticipated expiration: 2040-06-23
Also published as: CN111720593A

Abstract

The invention discloses a multifunctional check valve, comprising: the multifunctional check valve comprises a valve body and a valve cover arranged on the valve body, wherein an inlet flow passage and an outlet flow passage are arranged in the valve body, a valve seat is arranged on one side of the inlet flow passage in the valve body, a passage communicated with the inlet flow passage is arranged in the valve seat, a valve clack matched with the valve seat is hinged in the valve body, and the multifunctional check valve further comprises a valve clack adjusting mechanism which is connected with the valve body and used for adjusting the opening angle and the closing speed of the valve clack. The invention has the advantages that: the closing speed and the opening angle of the valve clack are controlled through the valve clack adjusting mechanism, so that the check valve has an automatic fault detection function, a stop function and a flow adjusting function, and the valve clack has a buffering function when being closed.

Description

Multifunctional check valve

Technical Field

The invention belongs to the technical field of pipeline valves, and particularly relates to a multifunctional check valve.

Background

The non-return valve is a valve commonly used in pipe systems, mainly installed at the outlet of the pump, which is used to communicate and non-return the fluid medium in the pipe system. The existing swing check valve mainly comprises a valve body, a valve seat and a check valve clack, wherein the valve seat is provided with a valve seat sealing surface and fixed in a valve body flow channel, the check valve clack is provided with a valve clack sealing surface and is arranged in a valve body inner cavity by utilizing a pin shaft, when a medium enters the valve body inner cavity from a valve inlet side, the medium pushes the check valve clack to rotate around the pin shaft to open, and when no medium enters from the valve inlet side, the check valve clack rotates around the pin shaft to close. The prior art swing check valves have several problems in use:

1. in the process of rotating and closing the check valve clack around the pin shaft, the closing speed is easy to generate too high, so that the impact force of the valve clack sealing surface to the valve seat sealing surface is too large and the valve clack is easy to damage; meanwhile, when the check valve clack is closed quickly, water hammer is easy to generate, and the damage conditions such as damage to the valve are caused;

2. when the check valve fails and cannot be normally closed, media in the pipeline can flow backwards to influence the normal operation of equipment, the swing check valve in the prior art is difficult to judge when failing, so that failure discovery is delayed, and manual inspection wastes time and labor;

3. the check valve in the prior art can only realize the non-return function, can not realize stopping and flow control function, and in order to realize the function of stopping and flow control, a stop valve and a regulating valve are required to be connected in series in the pipeline, so that the complexity and cost of the pipeline are increased.

Disclosure of Invention

In view of the above, it is desirable to provide a multi-functional check valve having a buffering function when a valve flap is closed, an automatic failure detection function, and a shut-off function and a flow rate adjustment function.

The invention discloses a multifunctional check valve, comprising: the valve body with set up in valve gap on the valve body, be provided with inlet flow channel and outlet flow channel in the valve body, the valve body is internal to be located one side of inlet flow channel is provided with the disk seat, be provided with in the disk seat with the passageway that the inlet flow channel communicates each other, articulated in the valve body have with the valve clack that the disk seat is mutually supported, multi-functional check valve still include valve clack guiding mechanism, valve clack guiding mechanism with the valve body is connected, adjusts the opening angle and the closed speed of valve clack, valve clack guiding mechanism includes: the piston cavity is arranged on the valve body, and the opening of the piston cavity is in threaded connection with a plug so that the piston cavity forms a closed containing cavity; the piston rod is connected to the piston cavity in a sliding mode, a piston head which is connected with the inner wall of the piston cavity in a sliding mode is fixedly connected to the piston rod, the piston head divides the piston cavity into a first cavity and a second cavity, incompressible liquid media are filled in the first cavity and the second cavity, one end of the piston rod penetrates through the valve body and extends to the outer side of the valve body, the other end of the piston rod extends into the valve body and is connected with the valve clack, and the piston rod can be driven to slide in the piston cavity when the valve clack is opened under the pressure; the one-way damping valve core is connected between the first cavity and the second cavity, and the piston rod and the piston head can be driven to move leftwards when the valve clack is pressed to be opened and moves rightwards and upwards, so that the volume of the first cavity is reduced, a liquid medium in the first cavity is driven to flow into the second cavity through a valve port of the one-way damping valve core, and the valve clack can be quickly opened when the valve clack is pressed; the damping hole is formed in the one-way damping valve core, when the pressure of the inlet flow channel is reduced, the valve clack moves to the left and the lower direction under the action of gravity and the action of pressure difference between the inlet flow channel and the outlet flow channel, so that the piston head is driven to move rightwards, the volume of the second cavity is reduced, the one-way damping valve core is closed at the moment, and the liquid medium in the second cavity flows into the first cavity through the damping hole in the one-way damping valve core, so that the valve clack has a damping and buffering effect when closed; the angle adjusting mechanism is connected to one end of the piston rod, which is positioned outside the valve body, and controls the distance of the piston rod moving leftwards through the angle adjusting mechanism, so that the valve clack is controlled to be in a stop state or the opening angle of the valve clack is adjusted, and the flow adjusting function is realized.

In one embodiment, the angle adjustment mechanism includes: the connecting rod is hinged to the valve body, a first long circular groove is formed in the connecting rod, a first protrusion is fixedly connected to one end, located on the outer side of the valve body, of the piston rod, the first protrusion is used for being clamped into the first long circular groove, the first protrusion is connected with the first long circular groove in a sliding mode, and the piston rod moves to drive the connecting rod to rotate; adjust the pole, threaded connection in on the connecting rod, it is used for control to adjust the turned angle of connecting rod to adjust the distance that the piston rod can move left, work as the threaded end of adjusting the pole passes the connecting rod and with during valve gap looks butt, the piston rod is located the right-hand member, at this moment the valve clack lid closes on the disk seat, make the valve clack is in the off-state, realizes ending the function, works as adjust the pole and outwards screw out, the valve clack can rotate to the upper right when receiving pressure, and along with the distance of adjusting the pole and outwards screwing out becomes long, valve clack upper right pivoted angle grow along with it, promptly the opening angle grow of valve clack, thereby can realize the flow control function.

In one embodiment, a magnetostrictive displacement sensor is fixedly connected to the outer side of the valve body, the magnetostrictive displacement sensor comprises a measuring rod, a magnetic sheet slidably connected with the measuring rod is fixedly connected between the piston rod and the valve body, and the magnetic sheet can be driven to slide on the measuring rod through the movement of the piston rod.

In one embodiment, one end of the piston rod, which is located inside the valve body, is fixedly connected with a second protrusion, a rocker is connected between the second protrusion and the valve clack, the upper portion of the rocker is hinged to the inner wall of the valve body, the lower end of the rocker is fixedly connected with the valve clack, the upper end of the rocker is fixedly connected with a connecting sheet, a second long circular groove is formed in the connecting sheet, the second protrusion is used for being clamped into the second long circular groove, and the second protrusion is connected with the second long circular groove in a sliding manner.

In one embodiment, a limiting block is fixedly connected to one side, away from the inlet flow passage, of the inner wall of the valve body, and the limiting block is used for limiting the maximum opening angle of the valve clack.

The technical scheme has the advantages that:

1. when the valve clack is rotated and closed under the action of gravity and the action of pressure difference between the inlet flow passage and the outlet flow passage, the piston head can move rightwards and drive the volume of the second cavity to be reduced, the one-way damping valve core is closed at the moment, and the liquid medium in the second cavity can only flow into the first cavity through the damping hole in the one-way damping valve core, so that a damping buffer effect can be achieved when the valve clack is closed, the check valve is prevented from being damaged due to the phenomenon of water hammer, and meanwhile, the phenomenon that the impact force of the sealing surface of the valve clack to the sealing surface of the valve seat is too large due to the too high closing speed of the valve clack can be avoided, so that a protection effect is achieved on the sealing surface of the valve clack and the sealing surface of the valve seat.

2. The invention can detect the position of the valve clack in real time by arranging the hysteresis telescopic displacement sensor, and gives an alarm when the valve clack cannot be normally opened or closed.

3. According to the invention, the adjusting rod is arranged, the stop state and the opening angle of the valve clack are adjusted by the adjusting rod, when the adjusting rod is completely screwed in, the valve clack can be in the stop state to realize the stop function, and when the adjusting rod is screwed out, the valve clack can be opened, and the longer the distance of the outward screwing-out of the adjusting rod is, the larger the opening angle of the valve clack is, so that the flow adjusting function can be realized.

Drawings

FIG. 1 is a cross-sectional view of the present invention with the valve flap in a closed and closed position;

FIG. 2 is a cross-sectional view of the present invention with the valve flap in a fully open position;

fig. 3 is an enlarged view at C in fig. 1.

In the figure, a valve body 1, a first cavity 1a, a second cavity 1b, a valve cover 2, a valve seat 3, a channel 31, a valve seat sealing surface 32, a valve flap 4, a valve flap sealing surface 41, a rocker 5, a connecting sheet 51, a second long circular groove 511, a piston rod 6, a piston head 61, a first protrusion 62, a second protrusion 63, a one-way damping valve core 7, a damping hole 71, a connecting rod 8, a first long circular groove 81, an adjusting rod 9, a plug 10, a magnetostrictive displacement sensor 11, a measuring rod 111, a magnetic sheet 12 and a limiting block 13.

Detailed Description

The technical solutions in the embodiments of the present invention will be clearly and completely described below with reference to the drawings in the embodiments of the present invention, and it is obvious that the described embodiments are only a part of the embodiments of the present invention, and not all of the embodiments. All other embodiments, which can be derived by a person skilled in the art from the embodiments given herein without making any creative effort, shall fall within the protection scope of the present invention.

It will be understood that when an element is referred to as being "mounted on" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. When an element is referred to as being "secured to" another element, it can be directly secured to the other element or intervening elements may also be present.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "or/and" includes any and all combinations of one or more of the associated listed items.

As shown in fig. 1 and 2, the present invention discloses a multi-functional check valve, comprising: valve body 1 with set up in valve gap 2 on the valve body 1, be provided with inlet flow way A and outlet flow way B in the valve body 1, lie in the valve body 1 one side of inlet flow way A is provided with disk seat 3, be provided with in the disk seat 3 with the passageway that inlet flow way A communicates each other, articulated in the valve body 1 have with disk seat 3 valve clack 4 of mutually supporting, multi-functional check valve still include valve clack adjustment mechanism, valve clack adjustment mechanism with valve body 1 is connected, adjusts the opening angle and the closed rate of valve clack 4, valve clack adjustment mechanism includes: the piston cavity is arranged on the valve body 1, and an opening of the piston cavity is in threaded connection with a plug 10 so that the piston cavity forms a closed cavity; the piston rod 6 is connected in the piston cavity in a sliding manner, the piston rod 6 is fixedly connected with a piston head 61 which is connected with the inner wall of the piston cavity in a sliding manner, the piston head 61 divides the piston cavity into a first cavity 1a and a second cavity 1b, incompressible liquid media such as hydraulic oil or silicone oil are filled in the first cavity 1a and the second cavity 1b, one end of the piston rod 6 penetrates through the valve body 1 and extends to the outer side of the valve body 1, the other end of the piston rod 6 extends into the valve body 1 and is connected with the valve clack 4, and the piston rod 6 can be driven to slide in the piston cavity when the valve clack 4 is opened under pressure; the one-way damping valve core 7 is connected between the first cavity 1a and the second cavity 1b, and can drive the piston rod 6 and the piston head 61 to move leftwards when the valve clack 4 is pressed to be opened and moves rightwards and upwards, so that the volume of the first cavity 1a is reduced, and the liquid medium in the first cavity 1a is driven to flow into the second cavity 1b through a valve opening of the one-way damping valve core 7, and the valve clack 4 can be quickly opened when being pressed; the damping hole 71 is formed in the one-way damping valve spool 7, when the pressure of the inlet flow channel a is reduced, the valve flap 4 moves to the left and downwards under the action of gravity and the action of the pressure difference between the inlet flow channel a and the outlet flow channel B, so that the piston head 61 is driven to move to the right, the volume of the second cavity 1B is reduced, at the moment, the one-way damping valve spool 7 is closed, and the liquid medium in the second cavity 1B flows into the first cavity 1a through the damping hole 71 in the one-way damping valve spool 7, so that the valve flap 4 has a damping and buffering effect when being closed; the angle adjusting mechanism is connected to one end, located on the outer side of the valve body 1, of the piston rod 6, and controls the distance of leftward movement of the piston rod 6 through the angle adjusting mechanism, so that the valve clack 4 is controlled to be in a stop state or the opening angle of the valve clack 4 is adjusted, and a flow adjusting function is achieved.

Preferably, a spring is arranged between the one-way damping valve core 7 and the valve body 1, so that the one-way damping valve core 7 is abutted to the valve port.

Preferably, as shown in fig. 2, a valve seat sealing surface 32 and a valve flap sealing surface 41 are respectively disposed on the opposite surfaces of the valve seat 3 and the valve flap 4, so that the valve flap 4 can be tightly fitted with the valve seat 3 when being closed, thereby achieving a sealing effect and playing a role in stopping.

Preferably, as shown in fig. 3, the aperture of the damping hole 71 is smaller than the inner diameter of the valve port of the one-way damping valve spool 7, when the valve flap 4 is closed, the piston head 61 moves rightward to drive the volume of the second cavity 1b to decrease, so that the liquid medium in the second cavity 1b can only flow into the first cavity 1a through the damping hole 71, and since the aperture of the damping hole 71 is smaller, the liquid medium flowing through the damping hole 71 is slower, that is, the liquid medium in the second cavity 1b slowly flows into the first cavity 1a, so that the closing rate of the valve flap 4 is slower, and a damping and buffering effect is achieved.

Preferably, the angle adjusting mechanism includes: the connecting rod 8 is hinged to the valve body 1, a first long circular groove 81 is formed in the connecting rod 8, a first protrusion 62 is fixedly connected to one end, located on the outer side of the valve body 1, of the piston rod 6, the first protrusion 62 is used for being clamped into the first long circular groove 81, the first protrusion 62 is connected with the first long circular groove 81 in a sliding mode, and the connecting rod 8 is driven to rotate through movement of the piston rod 6; adjust pole 9, threaded connection in on the connecting rod 8, adjust pole 9 and be used for control the turned angle of connecting rod 8 to adjust the distance that piston rod 6 can move left, work as the threaded end of adjusting pole 9 passes connecting rod 8 and with during valve gap 2 looks butt, piston rod 6 is located the right-hand member, this moment valve clack 4 lid closes on disk seat 3, make valve clack 4 is in the off-state, realizes ending the function, work as adjust pole 9 outwards back-out certain distance, valve clack 4 can rotate right upper side when receiving pressure, along with adjust the length increase of the outside back-out of pole 9, valve clack 4 can right upper side pivoted angle along with it grow, promptly valve clack 4's opening angle grow, and the retardation to fluid in the valve body 1 reduces, thereby can realize the flow control function.

Preferably, a magnetostrictive displacement sensor 11 is fixedly connected to the outer side of the valve body 1, the magnetostrictive displacement sensor 11 includes a measuring rod 111, the piston rod 6 is located between the connecting rod 8 and the valve body 1, a magnetic sheet 12 slidably connected to the measuring rod 111 is fixedly connected to the piston rod 6, and the piston rod 6 can move to drive the magnetic sheet 12 to slide on the measuring rod 111.

It can be understood that the magnetostrictive displacement sensor 11 measures the moving length of the piston rod 6 by measuring the position of the magnetic sheet 12 on the side lever 111, thereby measuring the opening degree of the valve flap 4, and gives an alarm when the valve flap 4 is detected to be unable to be normally opened.

Preferably, in this embodiment, the piston rod 6 is located the inside one end fixedly connected with second arch 63 of valve body 1, second arch 63 with be connected with rocker 5 between the valve clack 4, the upper portion of rocker 5 with valve body 1 inner wall is articulated each other, the lower extreme of rocker 5 with fixed connection between the valve clack 4, the upper end fixedly connected with connection piece 51 of rocker 5, second long circular slot 511 has been seted up on connection piece 51, second arch 63 is used for the card to be gone into in the second long circular slot 511, just second arch 63 with second long circular slot 511 sliding connection.

It should be noted that, in other embodiments, the piston rod 6 may also be directly connected to the valve flap 4, and the flow rate of the valve is adjusted by controlling the opening and closing of the valve flap 4.

Preferably, a limiting block 13 is fixedly connected to one side, far away from the inlet flow channel a, of the inner wall of the valve body 1, and the limiting block 13 is used for limiting the maximum opening angle of the valve flap 4.

The working mode of the invention is as follows: when the check valve is subjected to flow adjustment, the outward screwing-out distance of the adjusting rod 9 is adjusted according to actual requirements, the longer the outward screwing-out distance is, the larger the opening angle of the valve clack 4 is, at the moment, fluid enters the inlet flow channel A and generates acting force on the valve clack 4, so that the valve clack 4 is opened from a closing position and moves towards the upper right, and the rocker 5 is driven to swing, by the cooperation of the second oblong slot 511 on the connecting piece 51 and the second protrusion 63 on the piston rod 6, thereby driving the piston rod 5 and the piston head 61 to move leftwards, reducing the volume of the first cavity 1a, enabling the liquid medium in the first cavity 1a to flow into the second cavity 1b through the valve opening of the one-way damping valve core 7, which is equivalent to the one-way damping valve core 7 without damping action, therefore, the valve clack 4 can be quickly opened when being pressed, and the opening angle of the valve clack 4 can be controlled according to the outward screwing-out distance of the adjusting rod 9 to realize the flow adjusting function; when the adjusting rod 9 is completely screwed in, as shown in fig. 1, the valve flap 4 can be in a cut-off state, so that a cut-off function is realized; when the adjusting rod 9 is completely screwed out, as shown in fig. 2, the valve flap 4 can be in a completely opened state; when the pressure of the inlet flow passage A is reduced, the valve flap 4 moves to the left and downwards under the action of gravity and the action of pressure difference between the inlet flow passage A and the outlet flow passage B, so that the piston head 61 is driven to move rightwards, the rocker 5 is driven to swing, the piston rod 6 and the piston head 61 move rightwards through the photo matching of the second long circular groove 511 and the second bulge 63 on the piston rod 6, the volume of the second cavity 1B is reduced, at the moment, the one-way damping valve core 7 is closed, and the liquid medium in the second cavity 1B can only flow into the first cavity 1a through the damping hole 71 on the one-way damping valve core 7, so that the damping buffer effect is achieved when the valve flap 4 is closed, and due to the arrangement of the hysteresis expansion displacement sensor 11 in the use process of the check valve, the position of the valve flap 4 can be detected in real time, and an alarm can be given when the valve flap 4 cannot be normally opened or closed, compared with manual inspection, the automatic inspection device can greatly improve the working efficiency and is more intelligent.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A multi-function check valve comprising: the valve body with set up in valve gap on the valve body, be provided with inlet flow channel and outlet flow channel in the valve body, be located in the valve body one side of inlet flow channel is provided with the disk seat, be provided with in the disk seat with the passageway that the inlet flow channel communicates each other, articulated in the valve body have with the valve clack that the disk seat is mutually supported, its characterized in that, multi-functional check valve still include valve clack adjustment mechanism, valve clack adjustment mechanism with the valve body is connected, adjusts the opening angle and the closed rate of valve clack, valve clack adjustment mechanism includes:

the piston cavity is arranged on the valve body, and the opening of the piston cavity is in threaded connection with a plug so that the piston cavity forms a closed containing cavity;

the piston rod is connected to the piston cavity in a sliding mode, a piston head which is connected with the inner wall of the piston cavity in a sliding mode is fixedly connected to the piston rod, the piston head divides the piston cavity into a first cavity and a second cavity, incompressible liquid media are filled in the first cavity and the second cavity, one end of the piston rod penetrates through the valve body and extends to the outer side of the valve body, the other end of the piston rod extends into the valve body and is connected with the valve clack, and the piston rod can be driven to slide in the piston cavity when the valve clack is opened under the pressure;

the one-way damping valve core is connected between the first cavity and the second cavity, and the piston rod and the piston head can be driven to move leftwards when the valve clack is pressed to be opened and moves rightwards and upwards, so that the volume of the first cavity is reduced, a liquid medium in the first cavity is driven to flow into the second cavity through a valve port of the one-way damping valve core, and the valve clack can be quickly opened when the valve clack is pressed;

the damping hole is formed in the one-way damping valve core, when the pressure of the inlet flow channel is reduced, the valve clack moves to the left and the lower direction under the action of gravity and the action of pressure difference between the inlet flow channel and the outlet flow channel, so that the piston head is driven to move rightwards, the volume of the second cavity is reduced, the one-way damping valve core is closed at the moment, and the liquid medium in the second cavity flows into the first cavity through the damping hole in the one-way damping valve core, so that the valve clack has a damping and buffering effect when closed;

the angle adjusting mechanism is connected to one end of the piston rod, which is positioned outside the valve body, and controls the distance of the piston rod moving leftwards through the angle adjusting mechanism, so that the valve clack is controlled to be in a stop state or the opening angle of the valve clack is adjusted, and the flow adjusting function is realized; the angle adjustment mechanism includes: the connecting rod is hinged to the valve body, a first long circular groove is formed in the connecting rod, a first protrusion is fixedly connected to one end, located on the outer side of the valve body, of the piston rod, the first protrusion is used for being clamped into the first long circular groove, the first protrusion is connected with the first long circular groove in a sliding mode, and the piston rod moves to drive the connecting rod to rotate; the regulating rod is in threaded connection with the connecting rod and is used for controlling the rotating angle of the connecting rod so as to regulate the distance that the piston rod can move leftwards, when the threaded end of the regulating rod penetrates through the connecting rod and is abutted against the valve cover, the piston rod is positioned at the rightmost end, the valve clack covers the valve seat at the moment, so that the valve clack is in a stop state to realize a stop function, when the regulating rod is screwed outwards, the valve clack can rotate rightwards and upwards when being pressurized, and the rotating angle of the valve clack towards the rightwards and upwards is increased along with the lengthening of the distance that the regulating rod is screwed outwards, namely the opening angle of the valve clack is increased, so that the flow regulating function can be realized; the outer side of the valve body is fixedly connected with a magnetostrictive displacement sensor which comprises a measuring rod, the piston rod is positioned between the connecting rod and the valve body and is fixedly connected with a magnetic sheet in sliding connection with the measuring rod, and the magnetic sheet can be driven to slide on the measuring rod through the movement of the piston rod.

2. The multifunctional check valve of claim 1, wherein one end of the piston rod inside the valve body is fixedly connected with a second protrusion, a rocker is connected between the second protrusion and the valve clack, the upper portion of the rocker is hinged to the inner wall of the valve body, the lower end of the rocker is fixedly connected with the valve clack, the upper end of the rocker is fixedly connected with a connecting piece, a second long circular groove is formed in the connecting piece, the second protrusion is used for being clamped into the second long circular groove, and the second protrusion is connected with the second long circular groove in a sliding manner.

3. The multi-functional check valve of claim 1, wherein a stopper is fixedly attached to a side of the inner wall of the valve body remote from the inlet channel, the stopper defining a maximum opening angle of the valve flap.