CN217272132U - Double-guide axial flow type check valve - Google Patents

Abstract

The utility model relates to a two direction axial-flow check valves, including the valve body part, the valve body part includes the valve body, the disk seat is established to valve body one end, establish sealed the pad between disk seat and the valve body, the inside fixed interior cavity of valve body of establishing of valve body, the valve body is coaxial with the cavity in the valve body, cavity one end establishes shaft hole I in the valve body, the gusset is established to the cavity other end in the valve body, establish shaft hole II at gusset surface center, shaft hole I is coaxial with shaft hole II, set up porosely on the gusset, establish the valve clack in short uide bushing and long uide bushing, the valve clack is including pole portion and spheroid tip, the sphere and the hyperbolic open the front cover laminating, be equipped with spring I between the spheroid tip back and the gusset, pole portion is kept away from spheroid tip one end fixed and is established the baffle, establish spring II between baffle and the short uide bushing, the one end surface that spheroid tip was kept away from to pole portion is established the groove. The utility model has the advantages that: the valve has the advantages of no impact on opening and closing, small flow resistance, large flow coefficient, double guidance of the inner cavity of the valve body, stable operation opening and closing, and avoidance of the problem that the flow resistance coefficient is increased due to the additional guidance in the valve seat hole.

Description

Double-guide axial flow type check valve

Technical Field

The utility model relates to the technical field of valves, concretely relates to two direction axial-flow type check valves.

Background

The axial flow check valve operates on the principle that the opening and closing of the flap is determined by the pressure difference between the inlet and outlet ends of the valve. When the pressure at the inlet end is greater than the sum of the pressure cycles at the outlet end to expand the spring force, the flap opens. The valve flap is always in the open state as long as the pressure difference exists, but the opening degree is determined by the magnitude of the pressure difference. When the sum of the pressure at the outlet end and the elastic force of the spring is larger than the pressure difference at the inlet end, the valve clack is closed and is always in a closed state.

The check valve commonly used in engineering has large flow resistance coefficient and serious throttling, particularly, the speed is too high when the check valve is opened and closed, so that the pressure in a pipeline is suddenly increased, the flow speed of a medium in the pipeline is increased after the pressure in the pipeline is increased, and the high-speed flowing medium is easy to form a water hammer at the turning position of the pipeline to damage the pipeline and use equipment. When the valve closing member in the valve closes the valve in an impact manner, the sealing surface is easily damaged, reducing the service life.

The publication number is: 112161090A, with the name: the utility model provides an axial-flow check valve, though also be the setting of dual spring, can solve the problem that the valve slowly closed, but because the setting of valve body inner chamber can not solve and reduce the flow resistance coefficient, guarantee the problem of medium circulation.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the problems that: a. how to load the two-way buffer to eliminate the valve vibration caused by the impact generated between the parts in the valve body when the valve clack is opened or closed; b. how to eliminate the impact damage of the valve seat sealing surface when the valve clack is closed; c. how to accurately and stably open and close the valve; e. how to reduce the flow resistance coefficient to ensure the medium flux.

The utility model provides an it does not have striking to open and close, the flow resistance is little, flow coefficient is big, and the two direction of valve body inner chamber are satisfying the operation and are opened and close steady in, have avoided adding the direction and increase the axial-flow type check valve of flow resistance coefficient problem at the disk seat downthehole usually.

The utility model relates to a double-guide axial-flow check valve, which comprises a valve body part, the valve body part comprises a valve body, one end of the valve body is provided with a valve seat, a sealing gasket is arranged between the valve seat and the valve body, the valve body is internally and fixedly provided with a cavity in the valve body, the valve body is coaxial with the cavity in the valve body, one end of the cavity in the valve body is provided with a shaft hole I, the other end of the cavity in the valve body is provided with a rib plate, the surface center of the rib plate is provided with a shaft hole II, the shaft hole I is coaxial with the shaft hole II, the rib plate is provided with a hole, a short guide sleeve is arranged in the shaft hole I, a long guide sleeve is arranged in the shaft hole II, a valve clack is arranged in the short guide sleeve and the long guide sleeve, the valve clack comprises a rod part and a ball end part, the ball end part is connected at one end of the rod part, one end part of the rod part, which is far away from the ball end part, is connected in the short guide sleeve and the long guide sleeve, the inner cavity wall of the valve seat is provided with a hyperbolic opening cover, the spherical surface is jointed with the hyperbolic opening cover, be equipped with the buffer ring between front cover and the tip of sphere is opened to the hyperbola, is equipped with spring I between the tip of sphere back and the gusset, and I cover of spring is on pole portion, and the one end that the tip of sphere was kept away from to pole portion is fixed and is provided with the baffle, is provided with spring II between baffle and the short uide bushing, and II covers of spring are on pole portion, and the one end surface that the tip of sphere was kept away from to pole portion is equipped with the groove, and the groove sets up along pole portion axis direction.

The back of the end part of the ball body is provided with a concave part and a positioning table, the positioning table is arranged at the center of the end part of the ball body, and the spring I is sleeved on the positioning table.

The holes are arranged in a plurality of manners, and the holes are uniformly distributed around the shaft hole II.

The groove is provided with a plurality of grooves which are uniformly distributed by taking the axis of the rod part as the center circumference.

The valve seat end face is provided with an assembling groove.

The one end that spheroid tip was kept away from to pole portion is connected with the retaining ring, and the retaining ring is connected in the baffle one side that deviates from spring II.

A sealing groove is arranged on the hyperbolic opening sealing surface, and a buffer ring is connected in the sealing groove.

The material of the buffer ring is rubber.

The beneficial effects of the utility model are that:

1) the valve clack is provided with a spring I and a spring II, when the valve is opened and closed, sealing impact is eliminated under the buffer of the spring I and the spring II, the valve clack is pushed leftwards by medium pressure, the valve clack gradually compresses the spring I, and the spring I buffers the thrust of a medium in the process of gradual compression, so that the valve vibration caused by strong impact of the valve clack and the end face of the cavity in the valve body due to rapid left movement of the valve clack caused by the thrust of the medium is avoided; when the flow direction of a pipeline is gradually reduced, the pressure at the inlet end of the valve is gradually reduced, the thrust on the spring I is also gradually reduced to form a recovery state, the back pressure of the valve is also increased, the medium reversely flows into the valve body from the outlet of the valve body and enters the cavity of the inner cavity of the valve body through the groove at the end of the rod part of the valve clack, the medium pushes the valve clack to move rightwards through the hole arranged on the surface of the rib plate, the compressed spring I recovers, and the spring II is gradually compressed to buffer the thrust of the reverse medium, so that the sealing surface is prevented from being damaged by strong impact of the valve clack and the hyperbolic valve seat inner cavity hyperbolic opening cover caused by the rapid right movement of the valve clack due to the thrust of the reverse medium; meanwhile, the problems caused by the fact that a buffer spring is added in a small cavity of the valve body are avoided, such as: the buffer springs in the small cavity of the valve body are both pressure springs or tension springs, and can only move in a single direction to play a role in buffering; if the pressure spring and the tension spring are matched for use, although movement buffering in two directions is realized, in the process of matching the pressure spring and the tension spring for use, the stress of the pressure spring and the tension spring is opposite, so that the problem of sealing leakage is caused when the valve is closed;

2) the hyperbola of the inner cavity of the hyperbola type valve seat is connected with the curve of the valve body flow channel, so that the flow area is satisfied, and the problem of flow choking of the inner cavity step hole type valve seat in the prior art is solved; the hyperbolic valve seat is provided with the buffer ring at the front end of the sealing surface as valve closing buffer, so that the problem of impact between the valve clack and the sealing surface of the valve seat when the valve is closed can be further prevented, and meanwhile, the buffer ring is prevented from being arranged on the circular arc surface of the valve clack, and the circular arc surface forms a sharp corner and a groove to cut off the streamline of the circular arc surface, so that the flow resistance is increased;

3) the process groove with the external valve seat end face avoids the problem of flow resistance increase caused by the internal arrangement in the inner cavity; the reasonable stroke can simultaneously meet the requirements of medium discharge and reasonable economy of flow resistance coefficient, avoids the instability caused by overlong cantilever when the valve clack is closed due to overlarge stroke, and increases the processing difficulty and is not economical due to overlarge cavity.

Drawings

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

FIG. 2 is a cross-sectional view taken along line A-A of the present invention;

fig. 3 is a schematic structural view of a valve body part according to the present invention;

FIG. 4 is a schematic structural view of the valve flap of the present invention;

FIG. 5 is a D-D cross-sectional view of the valve flap of the present invention;

FIG. 6 is a schematic structural view of the valve seat of the present invention;

fig. 7 is a right side view of the valve seat of the present invention;

FIG. 8 is an initial state diagram of the medium pressure actuated valve flap of the present invention;

FIG. 9 is a diagram of the process of the present invention in which the valve flap is pushed by the medium pressure to enter the valve body;

fig. 10 is a diagram of the process of the present invention in which the valve flap is closed to stop the medium flowing when the back pressure is higher than the medium pressure.

In the figure: the valve comprises a valve body part 1, a valve body 1-1, a short guide sleeve 1-2, a valve body inner cavity 1-3, a hole 1-4, a rib plate 1-5, a shaft hole I1-7, a shaft hole II 1-8, a retainer ring 2, a baffle plate 3, a spring II 4, a valve clack 5, a rod part 5-1, a concave part 5-2, a ball end part 5-3, a groove 5-4, a positioning table 5-5, a long guide sleeve 6, a spring I7, a buffer ring 8, a sealing gasket 9, a valve seat 10, an assembly groove 10-1, a sealing groove 10-2 and a hyperbolic open cover 10-3.

Detailed Description

The invention will be further described with reference to fig. 1-7.

The utility model relates to a two direction axial-flow type check valves, including valve body component 1, valve body component 1 includes valve body 1-1, and valve body 1-1 one end is provided with disk seat 10, is equipped with sealed pad 9, its characterized in that between disk seat 10 and the valve body 1-1: the valve body 1-1 is internally and fixedly provided with a valve body inner cavity 1-3, the valve body 1-1 is coaxial with the valve body inner cavity 1-3, one end of the valve body inner cavity 1-3 is provided with a shaft hole I1-7, the other end of the valve body inner cavity 1-3 is provided with a rib plate 1-5, the surface center of the rib plate 1-5 is provided with a shaft hole II 1-8, the shaft hole I1-7 is coaxial with the shaft hole II 1-8, the rib plate 1-5 is provided with a hole 1-4, a short guide sleeve 1-2 is arranged in the shaft hole I1-7, a long guide sleeve 6 is arranged in the shaft hole II 1-8, a valve flap 5 is arranged in the short guide sleeve 1-2 and the long guide sleeve 6, the valve flap 5 comprises a rod part 5-1 and a sphere end part 5-3, the sphere end part 5-3 is connected with one end of the rod part 5-1, one end of the rod part 5-1, which is far away from the end part 5-3 of the sphere, is slidably connected into the short guide sleeve 1-2 and the long guide sleeve 6, the inner cavity wall of the valve seat 10 is provided with a hyperbolic opening cover 10-3, the spherical surface of the end part 5-3 of the sphere is attached to the hyperbolic opening cover 10-3, a buffer ring 8 is arranged between the hyperbolic opening cover 10-3 and the end part 5-3 of the sphere, a spring I7 is arranged between the back surface of the end part 5-3 of the sphere and the rib plate 1-5, the spring I7 is sleeved on the rod part 5-1, one end of the rod part 5-1, which is far away from the end part 5-3 of the sphere, is fixedly provided with a baffle 3, a spring II 4 is arranged between the baffle 3 and the short guide sleeve 1-2, the spring II 4 is sleeved on the rod part 5-1, and the outer surface of one end of the rod part 5-1, which is far away from the end part 5-3 of the sphere, is provided with a groove 5-4, the grooves 5-4 are arranged along the axial direction of the rod part 5-1. The problem of single guide cause valve clack 5 open and close valve, the unable accuracy that cantilever overlength caused is closed is solved.

The back of the end part 5-3 of the sphere is provided with a concave part 5-2 and a positioning table 5-5, the positioning table 5-5 is arranged in the center of the end part 5-3 of the sphere, and a spring I7 is sleeved on the positioning table 5-5. And is better used for placing the spring I7.

The holes 1-4 are provided with a plurality of holes 1-4 which are uniformly distributed around the shaft by taking the center of the shaft hole II 1-8 as the shaft.

The number of the grooves 5-4 is multiple, and the grooves 5-4 are uniformly distributed on the circumference by taking the axis of the rod part 5-1 as the center.

The end face of the valve seat 10 is provided with an assembling groove 10-1.

One end, far away from the end part 5-3 of the sphere, of the rod part 5-1 is connected with a check ring 2, and the check ring 2 is connected to one side, far away from the spring II 4, of the baffle plate 3.

The hyperbolic open cover 10-3 is provided with a sealing groove 10-2, and the buffer ring 8 is connected in the sealing groove 10-2.

The buffer ring 8 is made of rubber.

An assembling groove 10-1 is formed in the end face of the valve seat 10.

The control method of the present invention will be further explained with reference to fig. 8-10.

1) Initial state: as shown in fig. 8, the valve clack 5 makes the end 5-3 of the ball and the hyperbolic open cover 10-3 mutually attached under the thrust of the spring I7, the buffer ring 8 ensures the sealing between the two, and the spring II 4 is in a compressed state;

2) the running state is as follows: as shown in fig. 9, when a pipeline medium is input into the valve, the valve clack 5 is pushed leftward by the medium pressure, the valve clack 5 gradually compresses the spring i 7, the spring i 7 buffers the thrust of the medium in the gradual compression process, so that valve vibration caused by strong impact between the valve clack 5 and the end surface of the cavity 1-3 in the valve body due to rapid leftward movement of the valve clack 5 caused by the thrust of the medium is avoided, the spring ii 4 gradually recovers along with leftward movement of the valve clack 5, the medium enters the cavity 1-3 in the valve body and flows into the pipeline, and as the medium pressure gradually rises, the valve clack 5 further compresses the spring i 7 and continuously moves leftward until the inner side wall of the sphere end 5-3 of the valve clack 5 is stably overlapped with the cavity 1-3 in the valve body, so that the factor of damaging the valve by impact is eliminated, and the medium flow reaches the maximum flow state at the moment. Under the condition that the medium pressure is stable, the opening degree of the valve is in a fully-opened stable state;

3) and (3) recovering the state: as shown in figure 10, when the medium flowing in the pipeline gradually decreases, the pressure at the inlet end of the valve gradually decreases, the thrust on the spring I7 is gradually reduced to form a recovery state, the back pressure of the valve also increases, the medium reversely flows from the outlet of the valve body into the valve body 1-1 and enters the cavity of the inner cavity 1-3 of the valve body through the groove 5-4 at the end of the rod part 5-1 of the valve clack 5, the medium pushes the valve clack 5 to move rightwards through the hole 1-4 arranged on the surface of the rib plate 1-5, the compressed spring I7 recovers, the spring II 4 is gradually compressed to buffer the thrust of the reverse medium, thereby avoiding the strong impact between the valve clack 5 and the hyperbolic valve seat 10 inner cavity hyperbolic opening cover 10-8 to damage the sealing surface and pushing the valve clack 5 to approach the hyperbolic valve seat 10 stably due to the quick rightward movement of the valve clack 5 caused by the thrust of the reverse medium, contact earlier to cushion ring 8, further reduce the velocity of movement of hyperbola disk seat 10 right, under reverse medium thrust, valve clack 5 compresses cushion ring 8 a fixed amount back, steadily contact the hyperbola sealed face of hyperbola disk seat 10, cut off the medium flow, the once of spring II 4 cushions gradually and cushion ring 8 secondary buffering has solved the striking when effectively having guaranteed valve clack 5 steady state contact curve disk seat 10 sealed face, cushion ring 8 has also played the medium seal effect, play dual function for the closing leak protection of this valve, when the technology situation is stable, spring I7, spring II 4 is in stable state, at this moment, the valve is in the closed condition.

The valve clack 5 of the utility model runs stably under the double guide of the long guide sleeve 6 and the short guide sleeve 1-2 in the inner cavity of the valve body 1-1, thereby avoiding the sealing leakage caused by the unstable inclined running formed by the overlong cantilever of the valve clack 5 when the valve is closed under the single guide; the valve clack 5, the spring I7 and the spring II 4 are matched for use when the valve is opened and closed, the impact of sealing is eliminated by the buffering of the double springs, and the damage of a sealing surface and the vibration of the valve are avoided; the hyperbola of the inner cavity of the hyperbola valve seat 10 is connected with the curve of the flow channel of the valve body 1 in a hyperbola way and is communicated with the curve of the flow channel, so that the flow characteristic of a medium is met, and the flow resistance coefficient is reduced; the buffering ring 8 is arranged at the front end of the sealing surface of the hyperbolic valve seat 10, and soft materials are used for buffering, so that the violent impact between the valve clack 5 and the sealing surface of the hyperbolic valve seat 10 when the valve is closed can be further prevented, and the two-phase sealing leakage-proof function is realized; the end face of the hyperbolic valve seat 10 is provided with four symmetrical assembling grooves 10-1, so that the increase of flow resistance caused by the damage of an inner cavity curve of the hyperbolic valve seat 10 due to a process groove hole arranged in an inner cavity is avoided; the reasonable design of the opening and closing stroke of the valve clack 5 meets the main flow resistance coefficient parameters of the axial-flow check valve, the overlarge stroke is avoided, the instability caused by overlong cantilever when the valve clack 5 is closed is caused, the processing difficulty is increased, and the overlarge valve body of the cavity is caused by the larger valve clack 5, so that the cost is increased.

Claims (8)

1. The utility model provides a two direction axial-flow type check valves, includes valve body part (1), and valve body part (1) includes valve body (1-1), and valve body (1-1) one end is provided with disk seat (10), is equipped with sealed pad (9), its characterized in that between disk seat (10) and valve body (1-1): the inner part of the valve body (1-1) is fixedly provided with an inner valve body cavity (1-3), the valve body (1-1) is coaxial with the inner valve body cavity (1-3), one end of the inner valve body cavity (1-3) is provided with a shaft hole I (1-7), the other end of the inner valve body cavity (1-3) is provided with a rib plate (1-5), the surface center of the rib plate (1-5) is provided with a shaft hole II (1-8), the shaft hole I (1-7) is coaxial with the shaft hole II (1-8), the rib plate (1-5) is provided with a hole (1-4), the shaft hole I (1-7) is internally provided with a short guide sleeve (1-2), the shaft hole II (1-8) is internally provided with a long guide sleeve (6), and the short guide sleeve (1-2) and the long guide sleeve (6) are internally provided with a valve flap (5), the valve clack (5) comprises a rod part (5-1) and a ball end part (5-3), the ball end part (5-3) is connected with one end of the rod part (5-1), one end of the rod part (5-1) far away from the ball end part (5-3) is connected in the short guide sleeve (1-2) and the long guide sleeve (6) in a sliding mode, the inner cavity wall of the valve seat (10) is provided with a hyperbolic curve opening cover (10-3), the spherical surface of the ball end part (5-3) is attached to the hyperbolic curve opening cover (10-3), a buffer ring (8) is arranged between the hyperbolic curve opening cover (10-3) and the ball end part (5-3), a spring I (7) is arranged between the back of the ball end part (5-3) and the rib plate (1-5), the spring I (7) is sleeved on the rod part (5-1), one end of the rod part (5-1) far away from the ball end part (5-3) is fixedly provided with a baffle plate (3), a spring II (4) is arranged between the baffle (3) and the short guide sleeve (1-2), the spring II (4) is sleeved on the rod part (5-1), a groove (5-4) is formed in the outer surface of one end, far away from the end part (5-3) of the sphere, of the rod part (5-1), and the groove (5-4) is formed in the axial direction of the rod part (5-1).

2. A dual direction axial flow check valve as recited in claim 1, wherein: the back of the end part (5-3) of the sphere is provided with a concave part (5-2) and a positioning table (5-5), the positioning table (5-5) is arranged at the center of the end part (5-3) of the sphere, and a spring I (7) is sleeved on the positioning table (5-5).

3. A dual direction axial flow check valve as recited in claim 1, wherein: the holes (1-4) are arranged in a plurality, and the holes (1-4) are uniformly distributed around the shaft hole II (1-8) by taking the center as the shaft.

4. A dual direction axial flow check valve as recited in claim 1, wherein: the number of the grooves (5-4) is multiple, and the grooves (5-4) are uniformly distributed on the circumference by taking the axis of the rod part (5-1) as the center.

5. A dual direction axial flow check valve as recited in claim 1, wherein: an assembling groove (10-1) is formed in the end face of the valve seat (10).

6. A dual direction axial flow check valve as recited in claim 1, wherein: one end, far away from the end part (5-3) of the sphere, of the rod part (5-1) is connected with a check ring (2), and the check ring (2) is connected to one side, far away from the spring II (4), of the baffle plate (3).

7. A dual direction axial flow check valve as recited in claim 1, wherein: the hyperbolic open cover (10-3) is provided with a sealing groove (10-2), and the buffer ring (8) is connected in the sealing groove (10-2).

8. A dual direction axial flow check valve as recited in claim 1, wherein: the buffer ring (8) is made of rubber.

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