CN210423838U

CN210423838U - Swing type slow-closing check valve

Info

Publication number: CN210423838U
Application number: CN201921531842.4U
Authority: CN
Inventors: 王帅
Original assignee: Zhengzhou Ludu Valve Co ltd
Current assignee: Zhengzhou Ludu Valve Co ltd
Priority date: 2019-09-16
Filing date: 2019-09-16
Publication date: 2020-04-28
Anticipated expiration: 2029-09-16

Abstract

The utility model discloses a swing type slow-closing check valve, which comprises a valve body, a slow-closing unit and an adjusting unit, wherein the left side inside the valve body is provided with a rocker arm through a hinge, a connecting shaft is inserted in a middle round hole of the rocker arm, the left end of the connecting shaft is fixedly connected with a valve clack, the upper end of the valve body is fixedly connected with a valve cover, the slow-closing unit is arranged on the right side of the valve clack, the adjusting unit is arranged in the middle of the valve cover and also comprises a nut, a feed inlet and a sealing plate, the nut is in threaded connection with the connecting shaft, the nut is arranged on the right side of the rocker arm, the, this swing type slowly closes check valve, the structure is various, produces water hammer and water hammer when avoiding the valve clack to open and close and influences life, can adjust the size and the speed that the valve clack opened, is provided with filtration, prevents that the valve clack from closing not tight and leading to the medium refluence.

Description

Swing type slow-closing check valve

Technical Field

The utility model relates to a check valve technical field specifically is a swing-type slow-closing check valve.

Background

The swing check valve is also called a check valve and has the functions of preventing the medium in the pipeline from flowing backwards, automatically opening or closing the valve clack by the medium flow and force, the valve for preventing medium from flowing backwards is mainly used on the pipeline for unidirectional medium flow, and only allows the medium to flow towards one direction to prevent accidents, the existing swing check valve mainly comprises a valve body and a valve clack, when the medium enters the inner cavity of the valve body from the inlet side of the valve, the medium pushes the check valve clack to rotate around the pin shaft to open, when no medium enters the inlet side of the valve, the check valve clack rotates around the pin shaft to be closed, the existing check valve is single in structure, water hammer and water hammer phenomena are easily generated when the valve clack is opened and closed, the service life is influenced, the opening size and the opening speed of the valve clack cannot be adjusted, no filtering structure exists, the valve clack is easily closed untight, and medium backflow is caused.

SUMMERY OF THE UTILITY MODEL

The to-be-solved technical problem of the utility model is to overcome current defect, provide a swing formula slow closure check valve, the structure is various, produces water hammer and water hammer when avoiding the valve clack to open and close and influences life, can adjust the size and the speed that the valve clack was opened, is equipped with filtration, prevents that the valve clack from closing not tight and leading to the medium refluence, can effectively solve the problem in the background art.

In order to achieve the above object, the utility model provides a following technical scheme: a swing type slow-closing check valve comprises a valve body, a slow-closing unit and an adjusting unit;

a valve body: a rocker arm is arranged on the left side inside the valve body through a hinge, a connecting shaft is inserted in a round hole in the middle of the rocker arm, a valve clack is fixedly connected to the left end of the connecting shaft, and a valve cover is fixedly connected to the upper end of the valve body;

a slow closing unit: the slow closing unit is arranged on the right side of the valve clack;

an adjusting unit: the adjusting unit is arranged in the middle of the valve cover;

wherein: the check valve also comprises a nut, a feed inlet and a sealing plate, wherein the nut is in threaded connection with the connecting shaft, the nut is arranged on the right side of the rocker arm, the feed inlet is arranged on the left side of the valve body, the sealing plate is fixedly connected to the left side of the valve clack, the sealing plate is arranged corresponding to the feed inlet, when a medium flows into the valve body from the feed inlet, the medium is firstly filtered by a filter screen to remove impurities such as solid particles in the medium, the normal work of the check valve is prevented from being influenced by the closing of the valve clack, the medium flows and the pressure of the medium impacts the sealing plate and the valve clack, so that the valve clack is opened by the rotation of the rocker arm along the hinge, meanwhile, due to the elastic buffering effect of the spring, the valve clack slowly pushes the sliding plate to slide upwards along the guide, because the effect of spring pulling force, the valve clack drives the sliding plate and slides down along the guide rail, makes the valve clack close slowly, produces the water hammer when preventing that the valve clack from opening and closing, makes valve clack and valve body violently collide and cause the damage, adjusts the messenger to the degree of opening and the rate of closing of valve clack at needs, and the height of rotatory handle adjusting pressure board, and then prescribes a limit to the shift position of sliding plate to adjust, easy operation is convenient, is convenient for maintain.

Furthermore, the slow-closing unit comprises two springs, a guide rail, a first connecting plate and a sliding plate, the springs are symmetrically arranged on the right side of the valve clack, the sliding plate is fixedly connected to the upper end of the springs, the sliding plate is of a triangular structure, two ends of the first connecting plate are respectively fixedly connected with the corresponding sliding plates, the guide rail is fixedly connected to the upper end of the valve body through a connecting rod, the sliding plate is far away from a sliding block on one side of the first connecting plate and a sliding groove sliding connection in the guide rail, when no medium flows, the valve clack is closed to the valve through rotation of a rocker arm along a hinge under the action of self gravity, and the valve clack cannot be instantaneously closed to damage the valve due to the.

Furthermore, the adjusting unit comprises a pressing plate, a second connecting plate, a screw rod and a handle, the screw rod is in threaded connection with the middle of the valve cover, the handle is fixedly connected to the top end of the screw rod, the pressing plate and the sliding plate are correspondingly arranged, the lower surface of the second connecting plate is fixedly connected with the upper ends of the two pressing plates respectively, the lower end of the screw rod is in sliding connection with a round hole in the middle of the second connecting plate through a sliding sheet, the height of the pressing plate is adjusted through rotating the handle, and then the position of the sliding plate is limited, so that the opening size and the closing speed of the valve clack are.

Further, still include filter screen and ring clamp, the filter screen sets up in the left side of feed inlet, ring clamp sets up in the left side of filter screen, ring clamp sets up with the left side recess cooperation of feed inlet, filters impurity and solid particulate matter in the medium, prevents to hinder the normal work that the valve clack closed influences the check valve.

Further, still include that the annular is sealed to seal up and the sealed pad of toper, the sealed pad of annular sets up in the lower surface of valve gap, the sealed pad of toper sets up in the extrados of screw rod, and the sealed pad of toper is located the upper end of valve gap, and the sealed pad of annular and the sealed pad of toper all play sealed effect, prevent that the medium from leaking outward.

Compared with the prior art, the beneficial effects of the utility model are that: this swing-type slowly-closing check valve has following benefit:

1. when the medium flowed into the valve body from the feed inlet, earlier through the filtration of filter screen, get rid of impurity such as solid particle in the medium, prevent to hinder the normal work that influences check valve of the closure of valve clack.

2. Medium flows and self pressure impact closing plate and valve clack, make the valve clack open along the hinge rotation through the rocking arm, simultaneously because the elasticity cushioning effect of spring, the valve clack passes through the spring and slowly promotes the sliding plate and upwards slides along the guide rail through the spring, until the sliding plate is blockked by the clamp plate, the spring is compressed completely, when no medium flows, the valve clack is closed along the hinge rotation through the rocking arm under the effect of self gravity, because the effect of spring pulling force, the valve clack drives the sliding plate and downwards slides along the guide rail, make the valve clack slowly close, produce the water hammer when preventing that the valve clack from opening and closing, make valve clack and valve.

3. The opening degree and the closing rate of the valve clack are adjusted to enable the valve clack to be opened, the handle is rotated to adjust the height of the pressing plate, and then the moving position of the sliding plate is limited, so that the valve clack is adjusted, and the valve clack is easy and convenient to operate and convenient to maintain.

Drawings

Fig. 1 is a schematic view of the sectional plane structure of the present invention.

In the figure: the valve comprises a valve body 1, a valve clack 2, a connecting shaft 3, a rocker arm 4, a nut 5, a slow closing unit 6, a spring 61, a guide rail 62, a first connecting plate 63, a sliding plate 64, an adjusting unit 7, a pressing plate 71, a second connecting plate 72, a screw 73, a handle 74, a filter screen 8, a feed inlet 9, a valve cover 10, an annular sealing gasket 11, a conical sealing gasket 12, a sealing plate 13 and an annular pressing plate 14.

Detailed Description

The technical solutions in the embodiments of the present invention will be described clearly and completely with reference to the accompanying drawings in the embodiments of the present invention, and it is obvious 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.

Referring to fig. 1, the present invention provides a technical solution: a swing type slow-closing check valve comprises a valve body 1, a slow-closing unit 6 and an adjusting unit 7; the left side in the valve body 1 is provided with a rocker arm 4 through a hinge, a connecting shaft 3 is inserted in a middle round hole of the rocker arm 4, the left end of the connecting shaft 3 is fixedly connected with a valve clack 2, the rocker arm 4 plays a role of rotating and connecting the valve clack 2, the upper end of the valve body 1 is fixedly connected with a valve cover 10, the valve cover 10 is convenient for maintaining the valve body 1, a slow-closing unit 6 comprises two springs 61, a guide rail 62, a first connecting plate 63 and sliding plates 64, the two springs 61 are symmetrically arranged on the right side of the valve clack 2, the sliding plates 64 are fixedly connected with the upper end of the springs 61, the sliding plates 64 are of a triangular structure, two ends of the first connecting plate 63 are respectively and fixedly connected with the corresponding sliding plates 64, the guide rail 62 is fixedly connected with the upper end in the valve body 1 through the connecting rod, a sliding block on one side of the sliding plates 64 far away from the first, because of the effect of spring 61 pulling force, make valve clack 2 can not close in the twinkling of an eye and cause the damage to the valve, regulating unit 7 includes clamp plate 71, second connecting plate 72, screw rod 73 and handle 74, screw rod 73 threaded connection is in the middle part of valve gap 10, handle 74 fixed connection is in the top of screw rod 73, clamp plate 71 corresponds the setting with sliding plate 64, the lower surface of second connecting plate 72 respectively with the upper end fixed connection of two clamp plates 71, the lower extreme of screw rod 73 passes through the gleitbretter and the round hole sliding connection in second connecting plate 72 middle part, adjust the height of clamp plate 71 through rotatory handle 74, and then prescribe a limit to the position of sliding plate 64, thereby adjust the size that valve clack 2 opened.

Wherein, still include the filter screen 8, annular pressure plate 14, annular seal pad 11 and the sealed 12 of toper, filter screen 8 sets up in the left side of feed inlet 9, annular pressure plate 14 sets up in the left side of filter screen 8, annular pressure plate 14 sets up with the left side recess cooperation of feed inlet 9, impurity and solid particulate matter in the medium filter, prevent to hinder the closed normal work that influences the check valve of valve clack 2, annular seal pad 11 sets up in the lower surface of valve gap 10, the sealed 12 of toper sets up in the extrados of screw rod 73, the sealed 12 upper end that is located valve gap 10 of toper, annular seal pad 11 and the sealed 12 of toper all play sealed effect, prevent that the medium from leaking outward.

Wherein, still include nut 5, feed inlet 9 and closing plate 13,

nut

5 and 3 threaded connection of connecting axle, nut 5 sets up in the right side of rocking arm 4, nut 5 plays fixed effect to connecting axle 3 and rocking arm 4, feed inlet 9 sets up in the left side of valve body 1, closing plate 13 fixed connection is in the left side of valve clack 2, closing plate 13 corresponds the setting with feed inlet 9, closing plate 13 plays sealed effect, prevent simultaneously that valve clack 2 from violently colliding with valve body 1 when closed, cause the damage.

When the check valve is used, when a medium flows into the valve body 1 from the feeding hole 9, the medium is firstly filtered by the filter screen 8 to remove impurities and solid particles in the medium, so that the normal operation of the check valve is prevented from being influenced by the closing of the valve clack 2, the medium flows and the pressure of the medium per se impacts the sealing plate 13 and the valve clack 2, so that the valve clack 2 is opened along the hinge by the rotation of the rocker arm 4, meanwhile, due to the elastic buffer action of the spring 61, the valve clack 2 slowly pushes the sliding plate 64 to slide upwards along the guide rail 62 through the spring 61 until the sliding plate 64 is blocked by the pressing plate 71, the spring 61 is completely compressed, when no medium flows, the valve clack 2 is closed along the hinge by the rotation of the rocker arm 4 under the action of the gravity of the valve clack 2, due to the tensile force of the spring 61, the valve clack 2 drives the sliding plate 64 to slide downwards, the rotation knob 74 adjusts the height of the pressing plate 71, and thus the position of the slide plate 64 is defined, thereby performing adjustment.

Although embodiments of the present invention have been shown and described, it will be appreciated by those skilled in the art that changes, modifications, substitutions and alterations can be made in these embodiments without departing from the principles and spirit of the invention, the scope of which is defined in the appended claims and their equivalents.

Claims

1. The utility model provides a swing-type slow-closing check valve which characterized in that: comprises a valve body (1), a slow closing unit (6) and an adjusting unit (7), wherein the left side inside the valve body (1) is provided with a rocker arm (4) through a hinge, a connecting shaft (3) is inserted in a middle round hole of the rocker arm (4), the left end of the connecting shaft (3) is fixedly connected with a valve clack (2), the upper end of the valve body (1) is fixedly connected with a valve cover (10), the slow closing unit (6) is arranged on the right side of the valve clack (2), the adjusting unit (7) is arranged in the middle of the valve cover (10), the slow closing valve further comprises a nut (5), a feeding hole (9) and a sealing plate (13), the nut (5) is in threaded connection with the connecting shaft (3), the nut (5) is arranged on the right side of the rocker arm (4), feed inlet (9) set up in the left side of valve body (1), closing plate (13) fixed connection is in the left side of valve clack (2), and closing plate (13) correspond the setting with feed inlet (9).

2. The swing-type slow-closing check valve as claimed in claim 1, wherein: slowly close unit (6) including spring (61), guide rail (62), first connecting plate (63) and sliding plate (64), spring (61) are two and the symmetry sets up in the right side of valve clack (2), sliding plate (64) fixed connection is in the upper end of spring (61), and sliding plate (64) are the triangle-shaped structure, the both ends of first connecting plate (63) respectively with corresponding sliding plate (64) fixed connection, guide rail (62) pass through connecting rod fixed connection in the inside upper end of valve body (1), the slider and the inside spout sliding connection of guide rail (62) of first connecting plate (63) one side are kept away from to sliding plate (64).

3. A swing-type slow-closing check valve as claimed in claim 2, wherein: the adjusting unit (7) comprises a pressing plate (71), a second connecting plate (72), a screw rod (73) and a handle (74), the screw rod (73) is connected to the middle of the valve cover (10) in a threaded mode, the handle (74) is fixedly connected to the top end of the screw rod (73), the pressing plate (71) and the sliding plate (64) are arranged correspondingly, the lower surface of the second connecting plate (72) is fixedly connected with the upper ends of the two pressing plates (71) respectively, and the lower end of the screw rod (73) is connected with a circular hole in the middle of the second connecting plate (72) in a sliding mode through a sliding piece.

4. The swing-type slow-closing check valve as claimed in claim 1, wherein: still include filter screen (8) and annular pressure plate (14), filter screen (8) set up in the left side of feed inlet (9), annular pressure plate (14) set up in the left side of filter screen (8), annular pressure plate (14) set up with the left side recess cooperation of feed inlet (9).

5. The swing-type slow-closing check valve as claimed in claim 1, wherein: still include annular packing pad (11) and the sealed pad (12) of toper, annular packing pad (11) set up in the lower surface of valve gap (10), the sealed pad (12) of toper sets up in the extrados of screw rod (73), and the sealed pad (12) of toper is located the upper end of valve gap (10).