CN217328615U - Damping assembly and check valve - Google Patents
Damping assembly and check valve Download PDFInfo
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- CN217328615U CN217328615U CN202221039127.0U CN202221039127U CN217328615U CN 217328615 U CN217328615 U CN 217328615U CN 202221039127 U CN202221039127 U CN 202221039127U CN 217328615 U CN217328615 U CN 217328615U
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- Y—GENERAL TAGGING OF NEW TECHNOLOGICAL DEVELOPMENTS; GENERAL TAGGING OF CROSS-SECTIONAL TECHNOLOGIES SPANNING OVER SEVERAL SECTIONS OF THE IPC; TECHNICAL SUBJECTS COVERED BY FORMER USPC CROSS-REFERENCE ART COLLECTIONS [XRACs] AND DIGESTS
- Y02—TECHNOLOGIES OR APPLICATIONS FOR MITIGATION OR ADAPTATION AGAINST CLIMATE CHANGE
- Y02E—REDUCTION OF GREENHOUSE GAS [GHG] EMISSIONS, RELATED TO ENERGY GENERATION, TRANSMISSION OR DISTRIBUTION
- Y02E30/00—Energy generation of nuclear origin
- Y02E30/30—Nuclear fission reactors
Abstract
The utility model discloses a damping subassembly and check valve. The utility model provides a damping component, which comprises a bracket body, a damping piece and a biasing piece, wherein the bracket body is suitable for being fixedly connected with a valve cover and installed in a valve cavity and is provided with a damping part and an installation part; the damping part is suitable for being sleeved outside a moving part of the valve structure and is arranged along the damping part in a sliding manner; the biasing member is mounted in the mounting portion and disposed between the bracket body and the damping member, and has a biasing force that drives the damping member to slide to open the valve structure when the valve structure is closed. The damping component of the structure drives the fluid medium in the bracket body to flow when the damping part moves, the resistance of the fluid medium acts on the damping part to move, so that the moving part is acted by the acting force in the opposite direction of the movement of the moving part, the valve structure is damped to be slowly closed, the gravity of the moving part is compensated through the biasing force, the opening resistance of the valve structure is reduced, and the response time of the valve structure when the valve structure is opened is shortened.
Description
Technical Field
The utility model relates to a check valve technical field, concretely relates to damping subassembly and check valve.
Background
The main water supply check valve series is key equipment of CAP (advanced passive pressurized water reactor nuclear power technology) series nuclear power units, is arranged at a position, close to a steam generator, of a water supply pipeline and aims to prevent the steam generator from emptying and radioactive substance from leaking under accident conditions. In order to prevent the downstream pipe from rupturing due to excessive water hammer forces generated during closure in the event of a break in the upstream feed water pipe, the check valve is closed by the steam generator back pressure, and the valve is typically provided with a damping device to reduce the effects of water hammer during rapid closure.
In the prior art, the check valve is generally in a Y-shaped structure with a damping device, damping is carried out by the damping device on the side of the check valve, when a fluid medium passes through the valve, the damping acting force generated by the side device is opposite to the closing direction of the check valve, and the water hammer influence in the closing process of the check valve is reduced.
However, in the check valve with the above structure, when the fluid medium opens the check valve through self pressure, the damping device needs to be driven to move together, the opening resistance of the check valve is large, the flow resistance is large, and the check valve cannot be in a full-open state under the condition of small volume flow.
SUMMERY OF THE UTILITY MODEL
Therefore, the utility model discloses the technical problem that solve lies in that the opening resistance that prior art stopped the return valve is big, and the check valve can't be in the defect of full open mode under little volume flow condition.
The utility model provides a damping subassembly cooperates in the valve structure setting, include:
the bracket body is suitable for being fixedly connected with the valve cover and installed in the valve cavity and is provided with a damping part and an installation part;
the damping part is suitable for being sleeved outside a moving part of the valve structure and is arranged along the damping part in a sliding manner;
a biasing member mounted in the mounting portion and disposed between the carrier body and the damping member, the biasing member having a biasing force that urges the damping member to slide to open the valve structure when the valve structure is closed.
Optionally, one of the damping part and the damping member is a cylinder structure, and the other is a groove structure.
Optionally, the groove body wall surface of the groove structure comprises a variable diameter wall and a cylindrical wall which are connected, and the variable diameter wall is suitable for being arranged close to one side of the valve cover;
in the direction far away from the valve cover, the section size of the variable diameter wall perpendicular to the groove depth direction of the groove structure is gradually reduced.
Optionally, the column structure has a first wall surface close to one side of the valve cover and a second wall surface far away from one side of the valve cover, the first wall surface is a convex surface, and the second wall surface is a concave surface.
Optionally, a plurality of through holes are arranged on the damping piece;
the damping component further comprises a blocking piece, and the blocking piece is arranged in the through hole to block the through hole.
Optionally, a plurality of flow parts are arranged on the bracket body, and the flow parts are suitable for communicating the damping part and the valve cavity.
The utility model provides a check valve, include:
the valve structure comprises a valve cover, a valve body and a moving part, wherein the valve cover is arranged on the valve body, and the moving part is arranged on the valve cover;
and the damping assembly is the damping assembly, and the biasing force is smaller than the gravity of the moving part.
Optionally, the moving part comprises: the valve comprises a valve rod and a valve clack, wherein the valve clack is connected with the valve rod.
Optionally, the bracket body further has a protrusion extending toward one side of the valve flap, and when the valve structure is opened, the protrusion abuts against the valve flap and encloses the valve flap to form a yielding cavity;
the convex part is provided with a flow passage, and when the valve structure is opened, the flow passage is communicated with the valve cavity and the abdicating cavity.
Optionally, the check valve still includes displacement detection mechanism, displacement detection mechanism includes mounting bracket, detection piece, magnetic part, connecting rod and mount pad, the mounting bracket with the mount pad is connected on the valve body, the connecting rod sets up the magnetic part with between the valve rod, the valve rod drive the magnetic part removes, the detection piece is connected on the mount pad, the detection piece detects the removal stroke of magnetic part.
The technical scheme provided by the utility model, following advantage has:
1. the utility model provides a damping component, which is matched with the valve structure, and comprises a bracket body, a damping part and a biasing part, wherein the bracket body is suitable for being fixedly connected with a valve cover and installed in the valve cavity and is provided with a damping part and an installation part; the damping part is suitable for being sleeved outside a moving part of the valve structure and is arranged along the damping part in a sliding manner; a biasing member is mounted in the mounting portion and disposed between the carrier body and the damping member, the biasing member having a biasing force that urges the damping member to slide to open the valve structure when the valve structure is closed.
According to the damping assembly with the structure, the support body and the damping piece are arranged between the valve cover and the valve cavity, the damping piece is arranged along the damping part of the support body in a sliding manner, so that the damping piece drives a fluid medium in the support body to flow when moving, the damping piece moves under the action of the resistance of the fluid medium, a moving part of the valve structure is subjected to an acting force in the opposite direction of the movement of the moving part, the closing process of the valve structure can be limited by the fluid medium driven by the damping piece, and the valve structure is slowly closed when being closed; when the valve structure is closed, the biasing member has a biasing force for driving the damping member to slide so as to open the valve structure, the gravity of the moving part is compensated through the biasing force, the opening resistance of the valve structure is reduced, the response time of the valve structure during opening is shortened, and when the valve structure flows into a fluid medium with small volume flow, a passage of the valve structure can be opened, so that the opening process of the valve structure is completed.
2. In the damping component provided by the utility model, one of the damping part and the damping part is of a cylinder structure, and the other one of the damping part and the damping part is of a groove structure; the groove body wall surface of the groove structure comprises a reducing wall and a cylindrical wall which are connected, and the reducing wall is suitable for being arranged close to one side of the valve cover; in the direction far away from the valve cover, the section size of the variable diameter wall perpendicular to the groove depth direction of the groove structure is gradually reduced; the cylinder structure is provided with a first wall surface close to one side of the valve cover and a second wall surface far away from one side of the valve cover, the first wall surface is a convex surface, and the second wall surface is a concave surface.
The damping component of the structure enables the support body and a fluid medium in the valve cavity to move mutually through the relative sliding between the damping part and the damping part, the flow area of the fluid medium is adjusted by the reducing wall and the cylindrical wall when the damping part and the damping part slide relatively, so that the resistance of the fluid medium changes, the size of the section of the reducing wall, which is perpendicular to the groove depth direction of the groove structure, of the reducing wall is gradually reduced, so that when the valve structure is closed, the flow area of the fluid medium is reduced, the resistance when the valve structure is closed is increased, the rapid closing under the action of the gravity of the moving part is avoided, and the valve structure has a damping slow closing function; the first wall is the convex surface, and when the valve structure was opened, the convex surface was favorable to reducing fluid medium's resistance, promoted the valve structure and opened the response, effectively reduced and opened the resistance, and the second wall is the concave surface, and when the valve structure was closed, the concave surface can increase fluid medium's resistance, promoted the valve structure and avoided quick closing, effectively increased and closed the resistance.
3. The damping component provided by the utility model is provided with a plurality of through holes; the damping component further comprises a blocking piece, and the blocking piece is arranged in the through hole to block the through hole.
The damping assembly of this structure seals the through-hole through the shutoff piece to two regional fluid medium's flow area about the adjustment damping piece, and then realize the adjustment to fluid medium resistance, the switching work that matches the valve structure better.
4. The utility model provides a damping assembly, be equipped with a plurality of circulation portions on the support body, the circulation portion is suitable for the intercommunication damping portion with the valve pocket.
The damping component with the structure is characterized in that the valve cavity is communicated with the damping part through the circulation part, the pressure between the valve cavity and the damping part is adjusted to be balanced, the damping part and the damping part can slide relatively, and then the moving part of the valve structure can move, so that the opening and closing functions of the valve structure are prevented from being influenced.
5. The utility model provides a check valve, which comprises a valve structure and a damping component, wherein the valve structure comprises a valve cover, a valve body and a moving part, the valve cover is arranged on the valve body, and the moving part is arranged on the valve cover; the biasing force is less than the weight of the moving member.
The check valve with the structure is characterized in that the damping assembly is arranged between the valve cover and the valve body, the moving part is connected with the damping assembly, when the valve structure is closed, the biasing part has a biasing force for driving the damping part to slide to open the valve structure, the biasing force is smaller than the gravity of the moving part, the gravity of the moving part is compensated and offset through the biasing force, the opening resistance of the check valve is reduced, meanwhile, the damping part is driven to move through the gravity action of the moving part, and the damping part slide relatively, so that the check valve has a damping slow-closing function.
6. The utility model provides a check valve, the moving part includes: the valve comprises a valve rod and a valve clack, wherein the valve clack is connected with the valve rod; the bracket body is also provided with a convex part extending towards one side of the valve clack, and when the valve structure is opened, the convex part is abutted against the valve clack and is enclosed with the valve clack to form a yielding cavity; the convex part is provided with a flow passage, and when the valve structure is opened, the flow passage is communicated with the valve cavity and the abdicating cavity.
The check valve of this structure carries on spacingly to the valve clack through the convex part on the support body, gives way the protection to the valve clack, gives way chamber and valve pocket through the runner intercommunication, and pressure regulation is balanced, avoids pressure to make valve clack and support body adsorb, hinders the open and close function of check valve.
Drawings
In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for the embodiments or the technical solutions in the prior art will be briefly described below, and it is obvious that the drawings in the following description are some embodiments of the present invention, and for those skilled in the art, other drawings can be obtained based on these drawings without creative efforts.
Fig. 1 is a schematic structural diagram of a damping assembly provided in an embodiment of the present invention;
fig. 2 is a schematic structural diagram of a check valve provided in an embodiment of the present invention;
fig. 3 is a schematic structural view of a main view of a bracket body provided in an embodiment of the present invention;
description of reference numerals:
1-valve cover; 2-a valve body; 3-a valve stem; 4-valve clack;
5-a stent body;
51-a damping portion; 52-a mounting portion; 53-circulation; 54-a convex portion; 541-a flow passage; 542-a channel;
6-a damping member; 61-a through hole;
7-a biasing member;
81-a mounting rack; 82-a detection member; 83-a magnetic member; 84-a connecting rod; 85-mounting seat.
Detailed Description
The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.
In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", and the like indicate orientations or positional relationships based on orientations or positional relationships shown in the drawings, and are only for convenience of description and simplification of description, but do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance.
In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" are to be construed broadly, and may be, for example, fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.
Furthermore, the technical features mentioned in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.
Example 1
The embodiment provides a damping assembly, as shown in fig. 1, which is matched with a valve structure and comprises a bracket body 5, a damping member 6 and a biasing member 7, wherein the bracket body 5 is suitable for being fixedly connected with a valve cover 1 and installed in a valve cavity and is provided with a damping part 51 and a mounting part 52; the damping part 6 is suitable for being sleeved outside a moving part of the valve structure, and the damping part 6 is arranged along the damping part 51 in a sliding manner; a biasing member 7 is mounted in the mounting portion 52 and disposed between the holder body 5 and the damper member 6, the biasing member 7 having a biasing force that urges the damper member 6 to slide to open the valve structure when the valve structure is closed.
In the damping assembly provided by the embodiment, the support body 5 and the damping piece 6 are arranged between the valve cover 1 and the valve cavity, and the damping piece 6 is arranged along the damping part 51 of the support body 5 in a sliding manner, so that the damping piece 6 drives the fluid medium in the support body 5 to flow when moving, the damping piece 6 moves under the resistance action of the fluid medium, a moving part of the valve structure is subjected to an acting force in the direction opposite to the movement direction of the moving part, the closing process of the valve structure can be limited by the fluid medium driven by the damping piece 6, and the valve structure is slowly closed when being closed; when the valve structure is closed, the biasing member 7 has a biasing force for driving the damping member 6 to slide so as to open the valve structure, and the gravity of the moving part is offset and counteracted by the compensation of the biasing force, so that the opening resistance of the valve structure is reduced, and the response time of the valve structure when the valve structure is opened is shortened, so that when the valve structure is introduced into a fluid medium with a small volume flow, a passage of the valve structure can be opened, and the opening process of the valve structure is completed.
In the damping assembly provided in this embodiment, in the damping part 51 and the damping member 6, the damping member 6 is a cylindrical structure, the damping part 51 is a groove structure, the movement of the damping member 6 is driven by a moving member, so that the damping part 51 and the damping member 6 slide, when the damping member 6 moves, a fluid medium flows through a gap between the damping part 51 and the damping member 6, and the flow area of the fluid medium is adjusted by configuring different cross-sectional shapes of the cylindrical structure and the groove structure in a direction perpendicular to the movement direction of the damping member 6, so that different fluid resistances are generated when the damping member 6 moves, and the movement of the moving member is acted; in other optional embodiments, the damping part 51 is a cylindrical structure, the damping part 6 is a groove structure, the movement of the damping part 6 is driven by the moving part, so that the damping part 51 and the damping part 6 slide, the flow area of the fluid medium is adjusted by using the changed gap between the cylindrical structure and the groove structure, and then different fluid resistances can be generated when the damping part 6 moves, thereby acting on the movement of the moving part.
In the damping assembly of this embodiment, the groove body wall surface of the groove structure comprises a variable diameter wall and a cylindrical wall which are connected, and the variable diameter wall is suitable for being arranged close to one side of the valve cover 1; in the direction far away from the valve cover 1, the section size of the variable diameter wall perpendicular to the groove depth direction of the groove structure is gradually reduced; through the relative sliding between the damping part 51 and the damping part 6, the support body 5 and the fluid medium in the valve cavity move mutually, the flow area of the fluid medium is adjusted by the reducing wall and the cylindrical wall when the damping part 51 and the damping part 6 slide relatively, so that the resistance of the fluid medium changes, the cross-sectional dimension of the reducing wall perpendicular to the groove depth direction of the groove structure is gradually reduced, and therefore when the valve structure is closed, the flow area of the fluid medium is reduced, the fluid medium can only flow through the gradually reduced gap between the damping part 51 and the damping part 6 after being extruded by the damping part 6, so that the resistance when the valve structure is closed is increased, the rapid closing under the gravity action of a moving part is avoided, and the valve structure has a damping slow closing function.
In the damping assembly provided by this embodiment, the cylinder structure has a first wall surface close to one side of the valve cap 1 and a second wall surface far away from one side of the valve cap 1, the first wall surface is a convex surface, and the second wall surface is a concave surface.
The damping component of the embodiment has the advantages that the first wall surface is the convex surface, when the valve structure is opened, the convex surface is favorable for reducing the resistance of the fluid medium, the opening response of the valve structure is promoted, the opening resistance is effectively reduced, the second wall surface is the concave surface, when the valve structure is closed, the resistance of the fluid medium can be increased through the concave surface, the valve structure is promoted to avoid quick closing, and the closing resistance is effectively increased.
In the damping assembly provided in the present embodiment, the biasing member 7 is in a spring structure, and extends and contracts with the movement of the damping member 6 in the height space between the damping member 6 and the bracket body 5. Specifically, the biasing member 7 is a cylindrical compression spring, and the Hooke coefficient of the cylindrical compression spring is reduced in a sufficient height space range, so that the valve clack 4 is subjected to a biasing force which is changed stably on a moving part by the biasing member 7 in a moving stroke, and the movement resistance generated by the gravity of the moving part is counteracted to the greatest extent.
In the damping component provided in this embodiment, the damping member 6 is provided with a plurality of through holes 61; the damping assembly further comprises a blocking piece arranged in the through hole 61 to block the through hole 61.
The damping component of the embodiment seals the through hole 61 through the plugging piece, so that the flow area of the fluid medium in the upper area and the lower area of the damping piece 6 is adjusted, the resistance of the fluid medium is adjusted, and the opening and closing work of the valve structure is better matched.
In the damping assembly provided by this embodiment, the support body 5 is provided with a plurality of flow portions 53, and the flow portions 53 are suitable for communicating the damping portion 51 and the valve cavity.
In the damping assembly of this embodiment, the valve cavity is communicated with the damping part 51 through the circulation part 53, and the pressure between the valve cavity and the damping part 51 is adjusted to be balanced, so that the damping part 51 and the damping member 6 can slide relatively, and further, the moving part of the valve structure can move, thereby avoiding affecting the opening and closing functions of the valve structure.
Example 2
The present embodiment provides a check valve, as shown in fig. 2, the check valve includes a valve structure and a damping assembly, the valve structure includes a valve cover 1, a valve body 2 and a moving component, the valve cover 1 is covered on the valve body 2, and the moving component is installed on the valve cover 1; the biasing force is less than the weight of the moving member.
In the check valve provided by the embodiment, the damping assembly is arranged between the valve cover 1 and the valve body 2, the moving part is connected with the damping assembly, when the valve structure is closed, the biasing part 7 has a biasing force for driving the damping part 6 to slide to open the valve structure, the biasing force is smaller than the gravity of the moving part, the gravity of the moving part is compensated and counteracted by the biasing force, the opening resistance of the check valve is reduced, meanwhile, the damping part 6 is driven to move by the gravity of the moving part, and the damping part 6 and the damping part 51 slide relatively, so that the check valve has a damping slow-closing function.
The present embodiment provides a check valve, wherein the moving member includes: a valve rod 3 and a valve clack 4, wherein the valve clack 4 is connected with the valve rod 3; as shown in fig. 1 and 3, the bracket body 5 further has a protrusion 54 extending toward one side of the valve flap 4, and when the valve structure is opened, the protrusion 54 abuts against the valve flap 4 and encloses the valve flap 4 to form a relief cavity; a flow passage 541 is arranged on the convex portion 54, and when the valve structure is opened, the flow passage 541 is communicated with the valve cavity and the abdicating cavity.
The check valve provided by the embodiment limits the valve clack 4 through the convex part 54 on the support body 5, performs abdication protection on the valve clack 4, communicates an abdication cavity and a valve cavity through the flow passage 541, adjusts pressure balance, avoids pressure from adsorbing the valve clack 4 and the support body 5, and hinders the opening and closing functions of the check valve, and the convex part 54 is configured according to the shape and the structural design of the actual valve clack 4.
As an alternative embodiment of the present embodiment, the protrusion 54 is provided with a channel 542, the channel 542 may be horizontally disposed on the protrusion 54 and penetrate through the protrusion 54, and the channel 542 is used for balancing the pressure between the yielding chamber and the valve chamber, so as to avoid affecting the movement stroke of the valve flap 4.
The flow channel 541 is tiltably provided on the projection 54, when the check valve chamber generates reverse flow, the fluid medium flowing backward flows back to the support body 5 in the valve chamber, the fluid medium flows to the side of the valve flap 4 away from the check valve medium inlet by the guidance of the flow channel 541, and the fluid medium flowing out of the flow channel 541 exerts force on the valve flap 4, so that the valve flap 4 closes the passage of the check valve chamber, and the one-way flow capacity of the check valve is promoted.
The check valve that this embodiment provided still includes displacement detection mechanism, displacement detection mechanism includes mounting bracket 81, detection piece 82, magnetism piece 83, connecting rod 84 and mount pad, mounting bracket 81 with the mount pad is connected on valve body 2, connecting rod 84 sets up magnetism piece 83 with between the valve rod 3, the valve rod 3 drive magnetism piece 83 removes, detection piece 82 is connected on the mount pad, detection piece 82 detects the removal stroke of magnetism piece 83, and when the check valve opened and closed under the fluid medium circulation effect, valve rod 3 can produce the motion to drive the removal of magnetism piece 83, and detection piece 82 detects the removal stroke of magnetism piece 83, and detection piece 82 can set up a plurality ofly, and the detection position of detection piece 82 distributes on the removal stroke of magnetism piece 83, the open and close state of detectable feedback check valve, the detecting member 82 may employ a magnetic proximity limit switch.
The check valve provided in the embodiment has the following working principle:
first, the biasing member 7 has a biasing force that drives the damping member 6 to slide to open the valve structure, and the opening resistance of the check valve is reduced by offsetting the gravity of the counteracting moving part by the biasing force; when the check valve is in a closed state and needs to be opened, fluid medium flows in through the inlet of the check valve, the valve clack 4 of the check valve is acted on one surface, close to the inlet of the check valve, of the check valve through the pressure of the fluid medium, and when the pressure of the fluid medium at the inlet of the check valve is larger than the opening resistance of the check valve, the fluid medium jacks up the valve clack 4 to open the check valve; meanwhile, the moving part moves, and the valve rod 3 drives the damping piece 6 to move; then, the damping member 6 and the damping portion 51 slide, when the check valve is opened, the gap between the damping portion 51 and the damping member 6 is gradually increased by the arranged reducing wall, so that the flow area of the fluid medium in the upper and lower regions of the damping member 6 is gradually increased, when the damping member 6 moves upwards, the area of the upper region of the damping member 6 is reduced, the area of the lower region of the damping member 6 is increased, the fluid medium is transferred to and flows to the lower region of the damping member 6, the resistance of the fluid medium is gradually reduced, the upward movement of the damping member 6 is promoted, and when the damping member 6 moves to the cylindrical wall, the resistance of the fluid medium tends to be stable, so that the opening resistance of the check valve is small; at this point, the opening process of the check valve is completed. When the fluid medium with small volume flow is introduced into the check valve, the passage of the check valve can be opened. When the pressure of the fluid medium at the inlet of the check valve is smaller than the opening resistance of the check valve, firstly, the moving part returns, and the valve clack 4 approaches to the inlet of the check valve; meanwhile, the motion part drives the damping part 6 to move, the damping part 6 and the damping part 51 slide, when the damping part 6 moves at the cylindrical wall, the cross-sectional area of the gap between the damping part 51 and the damping part 6 is unchanged, and the damping part 6 descends stably; then, when the damping piece 6 moves from the cylindrical wall to the reducing wall in a transition way, the gap between the damping part 51 and the damping piece 6 is gradually reduced, so that the flow area of the fluid medium in the upper area and the lower area of the damping piece 6 is gradually increased, when the damping piece 6 moves downwards, the area of the upper area of the damping piece 6 is increased, the area of the lower area of the damping piece 6 is reduced, the fluid medium is transferred to and flows to the upper area of the damping piece 6, the resistance generated by the fluid medium is gradually increased, the downward moving process of the damping piece 6 is blocked, the moving part is gradually decelerated and descended, and the valve clack 4 is subjected to the damping action of the damping piece 6, so that the passage of the check valve is slowly closed; finally, when the fluid medium does not flow in the valve chamber passage, the check valve is closed by the gravity of the moving member because the biasing force is smaller than the gravity of the moving member. At this point, the closing process of the check valve is completed. When the moving part moves, the valve rod 3 drives the magnetic member 83 to displace, and the displacement of the magnetic member 83 is monitored by the detection member 82, so that the open/close state of the check valve is fed back.
It should be understood that the above examples are only for clarity of illustration and are not intended to limit the embodiments. Other variations and modifications will be apparent to persons skilled in the art in light of the above description. And are neither required nor exhaustive of all embodiments. And obvious variations or modifications can be made without departing from the scope of the invention.
Claims (10)
1. A damping assembly disposed in association with a valve structure, comprising:
the bracket body (5) is suitable for being fixedly connected with the valve cover (1) and installed in the valve cavity and is provided with a damping part (51) and an installation part (52);
the damping piece (6) is suitable for being sleeved outside a moving part of the valve structure, and the damping piece (6) is arranged along the damping part (51) in a sliding mode;
a biasing member (7) mounted in the mounting portion (52) and disposed between the holder body (5) and the damper member (6), the biasing member (7) having a biasing force that drives the damper member (6) to slide to open the valve structure when the valve structure is closed.
2. Damping assembly according to claim 1, characterized in that in the damping part (51) and the damping member (6), one of them is of cylindrical configuration and the other one of them is of grooved configuration.
3. The damping assembly according to claim 2, characterized in that the groove wall surface of the groove structure comprises a variable diameter wall and a cylindrical wall connected, the variable diameter wall being adapted to be arranged close to one side of the valve cover (1);
in the direction far away from the valve cover (1), the section size of the variable diameter wall perpendicular to the groove depth direction of the groove structure is gradually reduced.
4. The damping assembly according to claim 2, characterized in that the cylinder structure has a first wall surface close to the side of the valve cover (1) and a second wall surface far from the side of the valve cover (1), the first wall surface being convex and the second wall surface being concave.
5. Damping assembly according to claim 1, characterized in that said damping member (6) is provided with a plurality of through holes (61);
the sealing device is arranged in the through hole (61) to seal the through hole (61).
6. Damping assembly according to claim 1, characterized in that the support body (5) is provided with a number of flow-through portions (53), the flow-through portions (53) being adapted to communicate the damping portion (51) with the valve chamber.
7. A check valve, comprising:
the valve structure comprises a valve cover (1), a valve body (2) and a moving part, wherein the valve cover (1) is covered on the valve body (2), and the moving part is arranged on the valve cover (1);
a damping assembly as claimed in any one of claims 1 to 6, the biasing force being less than the weight of the moving part.
8. The non-return valve according to claim 7, characterized in that the moving part comprises a stem (3) and a flap (4), the flap (4) being connected to the stem (3).
9. The non-return valve according to claim 8, characterized in that the bracket body (5) further has a protrusion (54) extending to one side of the flap (4), the protrusion (54) abutting the flap (4) and enclosing the flap (4) as a relief chamber when the valve structure is opened;
be equipped with runner (541) on convex part (54) when valve structure opens, runner (541) intercommunication the valve pocket with let the position chamber.
10. The check valve of claim 8, further comprising a displacement detection mechanism, wherein the displacement detection mechanism comprises a mounting frame (81), a detection member (82), a magnetic member (83), a connecting rod (84) and a mounting seat (85), the mounting frame (81) and the mounting seat (85) are connected on the valve body (2), the connecting rod (84) is arranged between the magnetic member (83) and the valve rod (3), the valve rod (3) drives the magnetic member (83) to move, the detection member (82) is connected on the mounting seat (85), and the detection member (82) detects the moving stroke of the magnetic member (83).
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221039127.0U CN217328615U (en) | 2022-04-28 | 2022-04-28 | Damping assembly and check valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202221039127.0U CN217328615U (en) | 2022-04-28 | 2022-04-28 | Damping assembly and check valve |
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| Publication Number | Publication Date |
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| CN217328615U true CN217328615U (en) | 2022-08-30 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202221039127.0U Active CN217328615U (en) | 2022-04-28 | 2022-04-28 | Damping assembly and check valve |
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| CN (1) | CN217328615U (en) |
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