CN112253815B

CN112253815B - Check valve

Info

Publication number: CN112253815B
Application number: CN202011513433.9A
Authority: CN
Inventors: 贾鲁斌; 武磊; 孙宁宁; 曹峰; 刘钦仁; 贾骏卓
Original assignee: Shandong Baiyuan Technology Co Ltd
Current assignee: Dongying Guangli Electromechanical Equipment Co.,Ltd.
Priority date: 2020-12-21
Filing date: 2020-12-21
Publication date: 2021-03-30
Anticipated expiration: 2040-12-21
Also published as: CN112253815A

Abstract

The invention relates to the technical field of check valves and discloses a check valve. The water inlet valve comprises a valve body, wherein a water inlet is formed in the valve body, a limiting shaft and two pin shafts are arranged on the inner side of the valve body, two ends of the limiting shaft and one ends of the two pin shafts penetrate through the valve body, the pin shafts and the outer wall of the limiting shaft are in threaded connection with first nuts, two valve clacks corresponding to the water inlet are arranged on the inner side of the valve body, and two connecting support lugs are fixedly connected to the two valve clacks; the valve clack through setting up is connected at two round pins epaxially, and two round pins axle are through the butt joint post connection, and the spring housing is established on the butt joint post, and the first nut in the round pin outside can be twisted to this kind of mode, makes one of them round pin axle outwards move, and the rectangle fixture block on the butt joint post can leave the rectangular hole of round pin axle this moment, outwards twitches the butt joint post, can be easy will be from selling epaxial separation to butt joint post and spring, can carry out quick replacement to the spring of vulnerable part, guarantee the leakproofness that the check valve used.

Description

Check valve

Technical Field

The invention relates to the technical field of check valves, in particular to a check valve.

Background

The check valve is a valve whose opening and closing piece is a circular valve flap and acts by self weight and medium pressure to block medium from flowing backwards, belonging to the automatic valve class, also called check valve, one-way valve, reflux valve or isolating valve, the valve flap motion mode is divided into lifting type and swing type, the double-flap butterfly check valve is also a swing action check valve, but it is a double-flap, and is closed under the action of spring, the fluid from bottom to top pushes the valve flap open, and can make the fluid pass through.

When the double-disc butterfly check valve works, fluid starts to flow, the valve clack is opened under the action of resultant force acting on the center of the sealing surface, and the action point of the spring support force playing a role in reaction is positioned outside the center of the valve clack surface, so that the valve clack is opened to work.

Disclosure of Invention

The present invention is directed to a check valve that solves the problems set forth above in the background art.

In order to achieve the purpose, the invention provides the following technical scheme:

a check valve comprises a valve body, wherein a water inlet is formed in the valve body, a limiting shaft and two pin shafts are arranged on the inner side of the valve body, two ends of the limiting shaft and one ends of the two pin shafts penetrate through the valve body, a first nut is in threaded connection with the pin shafts and the outer wall of the limiting shaft, two valve clacks corresponding to the water inlet are arranged on the inner side of the valve body, two connecting lugs are fixedly connected to the two valve clacks, the connecting lugs are sleeved on the pin shafts, a butt joint column is arranged between the two pin shafts, rectangular fixture blocks are fixedly connected to two ends of the butt joint column, the two rectangular fixture blocks are respectively inserted into the two pin shafts, springs corresponding to the two valve clacks are sleeved on the outer wall of the butt joint column, two external ring plates are fixedly connected to the outer wall of the valve body, mounting flanges are arranged on two sides of the valve, a plurality of mounting bolt one end all runs through external ring board with mounting flange, and a plurality of the equal threaded connection of mounting bolt outer wall has the second nut.

Furthermore, two bosses are fixedly connected to the outer side of the valve body, and the pin shaft and one end of the limiting shaft penetrate through the bosses.

Furthermore, the pin shaft and the outer wall of the limiting shaft are provided with external threads corresponding to the first nut, and the end face of the inner side of the first nut is attached to the end face of the outer side of the boss.

Furthermore, the outer wall of the pin shaft is sleeved with two limiting sleeves, and the two limiting sleeves are located in the valve body.

Further, two the boss outside all is equipped with the protecting crust, the protecting crust inboard has the card strip, just the boss seted up with the corresponding draw-in groove of card strip.

Furthermore, rectangular holes are formed in one sides, close to the butting columns, of the two pin shafts, and the two rectangular clamping blocks are respectively inserted into the two rectangular holes.

Furthermore, the outer walls of the two valve clacks are fixedly connected with extension plates.

Furthermore, a plurality of through holes are formed in the external connection ring plate, and the mounting bolts are located in the through holes.

Furthermore, the mounting flange is provided with a groove, and the mounting bolt is located in the groove.

Further, the length of the butt column is larger than that of the spring.

Compared with the prior art, the invention has the beneficial effects that:

1. the valve clack through setting up is connected at two round pins epaxially, and two round pins axle are through the butt joint post connection, and the spring housing is established on the butt joint post, and the first nut in the round pin outside can be twisted to this kind of mode, makes one of them round pin axle outwards move, and the rectangle fixture block on the butt joint post can leave the rectangular hole of round pin axle this moment, outwards twitches the butt joint post, can be easy will be from selling epaxial separation to butt joint post and spring, can carry out quick replacement to the spring of vulnerable part, guarantee the leakproofness that the check valve used.

2. Through being provided with the protecting crust in the outside of boss, this protecting crust can block on the boss under the effect of card strip, makes the protecting crust can cover the round pin axle, spacing axle and the first nut that expose, protects its structure, avoids first nut the difficult phenomenon of twisting the action of corrosion to appear, improves the effect that the check valve used.

3. Be provided with external ring board through the outside at the check valve, external ring board can be connected with mounting flange under the effect of construction bolt, can connecting tube on the mounting flange, use the check valve, mounting flange sets up flutedly, can not only save the use of material, reduce cost, and the construction bolt of being convenient for penetrates to the mounting flange in, makes check valve and mounting flange be convenient for connect.

Drawings

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

Fig. 2 is a schematic structural view of the outer side of the valve body in the present invention.

Fig. 3 is a schematic structural view of the interior of the valve body in the present invention.

Fig. 4 is a cross-sectional view of the present invention.

Fig. 5 is a schematic structural diagram of a valve flap and a pin shaft in the present invention.

Fig. 6 is a schematic structural view of the docking post of the present invention.

Fig. 7 is a schematic view of the mounting flange structure of the present invention.

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.

Referring to fig. 1-7 together, a check valve comprises a valve body 1, the valve body 1 is provided with a water inlet 101, the inner side of the valve body 1 is provided with a limiting shaft 13 and two pin shafts 12, both ends of the limiting shaft 13 and one end of each pin shaft 12 penetrate through the valve body 1, the outer walls of the pin shafts 12 and the limiting shaft 13 are in threaded connection with a first nut 3, the inner side of the valve body 1 is provided with two valve flaps 15 corresponding to the water inlet 101, two connecting lugs 16 are fixedly connected to the two valve flaps 15, the connecting lugs 16 are sleeved on the pin shafts 12, a butt joint column 19 is arranged between the two pin shafts 12, both ends of the butt joint column 19 are fixedly connected with rectangular fixture blocks 191, the two rectangular fixture blocks 191 are respectively inserted on the two pin shafts 12, the outer wall of the butt joint column 19 is sleeved with springs 18 corresponding to the two valve flaps 15, the outer wall of the valve body 1 is fixedly, the mounting flange 5 outside is equipped with a plurality of mounting bolt 6, and the 6 one end of a plurality of mounting bolt all runs through external crown plate 11 and mounting flange 5, and the equal threaded connection of the 6 outer walls of a plurality of mounting bolt has second nut 61.

The valve body 1 is provided with a water inlet 101, the inner side of the valve body 1 is provided with two valve clacks 15 corresponding to the water inlet 101, when the valve body 1 is used, fluid flows, the valve clacks 15 are opened under the action of resultant force acting on the center of a sealing surface, the action point of a spring 18 supporting force playing a role in reaction is positioned outside the center of the surface of the valve clack 15, so that the root parts of the valve clacks 15 are firstly opened, the sealing surface friction phenomenon generated when the valve clacks 15 are opened by an old conventional valve is avoided, the abrasion of parts is eliminated, the two valve clacks 15 move to be opened by taking a pin shaft 12 as the circle center, the movement is stopped under the action of a limiting shaft 13, the fluid can pass through, when the flow speed is reduced, the spring 18 automatically reacts in a reaction manner, the valve clacks 15 are closed and approach a valve seat of the valve body 1, the stroke distance, the influence of water hammer phenomenon is reduced, and no impact performance is realized, the technology is the prior art, the outer walls of two valve clacks 15 are fixedly connected with an extension plate 151, when the valve clacks 15 are closed, the extension plate 151 can increase the contact area of the valve clack 15 and a valve body 1, so that the valve clack 15 fully covers a water inlet 101, the sealing performance of the valve body 1 is ensured, because the valve clack 15 is connected on two pin shafts 12, one sides of the two pin shafts 12, which are close to a butting column 19, are respectively provided with a rectangular hole 121, two rectangular fixture blocks 191 are respectively inserted into the two rectangular holes 121, the two pin shafts 12 are connected through the butting column 19, the length of the butting column 19 is greater than that of a spring 18, the spring 18 is stably sleeved on the butting column 19, in such a way, a first nut 3 at the outer side of the pin shafts 12 can be screwed, one of the pin shafts 12 can move outwards, and the rectangular fixture block, the butting column 19 is pulled outwards, the butting column 19 and the spring 18 can be easily separated from the pin shaft 12, the spring 18 of a quick-wear part can be quickly replaced, the sealing performance of the use of the check valve is ensured, the traditional structure that the spring 18 is integrally installed is changed, the valve is not easy to replace when being damaged, the use of the check valve is influenced, and the valve clack 15 is inserted and installed through the pin shaft 12, so that the valve body 1 can be conveniently assembled;

the outer side of the valve body 1 is fixedly connected with two bosses 2, one ends of a pin shaft 12 and a limiting shaft 13 both penetrate through the bosses 2, the outer walls of the pin shaft 12 and the limiting shaft 13 are provided with external threads 14 corresponding to a first nut 3, the inner end face of the first nut 3 is attached to the outer end face of the boss 2, the external threads 14 are matched with the first nut 3, the pin shaft 12 and the limiting shaft 13 can be conveniently installed, the outer wall of the pin shaft 12 is sleeved with two limiting sleeves 17, the two limiting sleeves 17 are both positioned in the valve body 1, when the valve clack 15 is installed on the pin shaft 12, the limiting sleeves 17 can limit the horizontal position of the valve clack 15, the valve clack 15 is prevented from moving on the pin shaft 12 and affecting the use, the outer side of the boss 2 is provided with a protective shell 4, the protective shell 4 can be clamped on the bosses 2 under the action of a clamping strip 41, the protective shell 4 is made of plastic, the, the protective shell 4 can cover the exposed pin shaft 12, the exposed limiting shaft 13 and the first nut 3 to protect the structure of the first nut 3, so that the phenomenon that the first nut 3 is rusted and is not easy to screw is avoided, and the using effect of the check valve is improved;

be provided with external ring plate 11 in the outside of check valve, external ring plate 11 can be connected with mounting flange 5 under mounting bolt 6's effect, a plurality of through-hole 111 has been seted up to external ring plate 11, mounting bolt 6 is located through-hole 111, can connecting tube on mounting flange 5, use the check valve, mounting flange 5 is seted up fluted 501, mounting bolt 6 is located recess 501, not only can save the use of material, reduce cost, and be convenient for mounting bolt 6 penetrates to mounting flange 5 in, make check valve and mounting flange 5 be convenient for connect.

In summary, in the check valve provided by the present invention, when the valve body 1 is in use, fluid flows, the two valve flaps 15 move and open around the pin 12 as a circle center, and stop moving under the action of the limiting shaft 13, so that fluid can pass through, when the flow rate is reduced, the spring 18 automatically reacts to cause the valve flaps 15 to close, approach to the valve seat of the valve body 1, and the closing stroke distance and time are reduced, the outer walls of the two valve flaps 15 are fixedly connected with the extending plate 151, when the valve flaps 15 close, the extending plate 151 can increase the contact area of the valve flaps 15 and the valve body 1, so that the valve flaps 15 fully cover the water inlet 101, the sealing performance of the valve body 1 is ensured, because the valve flaps 15 are connected to the two pin shafts 12, one sides of the two pin shafts 12, which are close to the butting column 19, are both provided with rectangular holes 121, two rectangular fixture blocks 191 are respectively plugged into, the length of the butt-joint column 19 is larger than that of the spring 18, the spring 18 is stably sleeved on the butt-joint column 19, the first nut 3 on the outer side of the pin shaft 12 can be screwed in this way, so that one pin shaft 12 can move outwards, at the moment, the rectangular fixture block 191 on the butt-joint column 19 can leave the rectangular hole 121 of the pin shaft 12, the butt-joint column 19 is pulled outwards, the butt-joint column 19 and the spring 18 can be easily separated from the pin shaft 12, the quick replacement of the spring 18 of a quick-wear part can be realized, the sealing performance of the check valve is ensured, the traditional structure that the spring 18 is integrally installed is changed, the valve flap 15 is not easy to replace when being damaged, the use of the check valve is influenced, the valve flap 15 is installed by penetrating through the pin shaft 12, the valve body 1 can be conveniently assembled, the two bosses 2 are fixedly connected on the outer side of the valve body 1, one end of the pin shaft 12 and one end of the limiting shaft 13, the end face of the inner side of the first nut 3 is attached to the end face of the outer side of the boss 2, the external thread 14 is matched with the first nut 3, a pin shaft 12 and a limit shaft 13 can be conveniently installed, two limit sleeves 17 are sleeved on the outer wall of the pin shaft 12, the two limit sleeves 17 are both positioned in the valve body 1, when the valve clack 15 is installed on the pin shaft 12, the limit sleeves 17 can limit the horizontal position of the valve clack 15, the valve clack 15 is prevented from moving on the pin shaft 12, the use is influenced, a protective shell 4 is arranged on the outer side of the boss 2, the protective shell 4 can be clamped on the boss 2 under the action of a clamping strip 41, the protective shell 4 can be buckled on the boss 2, the protective shell 4 can cover the exposed pin shaft 12, the limit shaft 13 and the first nut 3, the structure of the protective shell is protected, the phenomenon that the first nut 3 is rusted and is not easy to twist is avoided, external ring plate 11 can be connected with mounting flange 5 under mounting bolt 6's effect, can connecting tube on the outer mounting flange 5, use the check valve, mounting flange 5 is seted up flutedly 501, mounting bolt 6 is located flutedly 501, not only can save the use of material, reduce cost, and be convenient for mounting bolt 6 penetrates to mounting flange 5 in, make check valve and mounting flange 5 be convenient for connect.

It is noted that, herein, relational terms such as first and second, and the like may be used solely to distinguish one entity or action from another entity or action without necessarily requiring or implying any actual such relationship or order between such entities or actions. Furthermore, the terms "comprises," "comprising," or any other variation thereof, are intended to cover a non-exclusive inclusion, such that a process method article or apparatus that comprises a list of elements does not include only those elements but may include other elements not expressly listed or inherent to such process method article or apparatus.

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

Claims

1. A check valve comprises a valve body (1), wherein a water inlet (101) is formed in the valve body (1), and the check valve is characterized in that a limiting shaft (13) and two pin shafts (12) are arranged on the inner side of the valve body (1), two ends of the limiting shaft (13) and one ends of the two pin shafts (12) penetrate through the valve body (1), the outer walls of the pin shafts (12) and the limiting shaft (13) are in threaded connection with first nuts (3), two valve flaps (15) corresponding to the water inlet (101) are arranged on the inner side of the valve body (1), two connecting lugs (16) are fixedly connected to the two valve flaps (15), and the connecting lugs (16) are sleeved on the pin shafts (12);

a butt joint column (19) is arranged between the two pin shafts (12), two ends of the butt joint column (19) are fixedly connected with rectangular fixture blocks (191), the two rectangular fixture blocks (191) are respectively inserted on the two pin shafts (12), and a spring (18) corresponding to the two valve flaps (15) is sleeved on the outer wall of the butt joint column (19);

the outer wall of the valve body (1) is fixedly connected with two external annular plates (11), mounting flanges (5) are arranged on two sides of the valve body (1), a plurality of mounting bolts (6) are arranged on the outer sides of the mounting flanges (5), one ends of the mounting bolts (6) penetrate through the external annular plates (11) and the mounting flanges (5), and second nuts (61) are in threaded connection with the outer walls of the mounting bolts (6);

two bosses (2) are fixedly connected to the outer side of the valve body (1), and the pin shaft (12) and one end of the limiting shaft (13) penetrate through the bosses (2);

the outer walls of the pin shaft (12) and the limiting shaft (13) are provided with external threads (14) corresponding to the first nut (3), and the end surface of the inner side of the first nut (3) is attached to the end surface of the outer side of the boss (2);

two boss (2) outside all is equipped with protecting crust (4), protecting crust (4) inboard has card strip (41), just boss (2) seted up with card strip (41) corresponding draw-in groove (201).

2. A non-return valve according to claim 1, characterized in that the pin (12) is sleeved with two stop sleeves (17), and the two stop sleeves (17) are both located in the valve body (1).

3. The check valve as claimed in claim 1, wherein one side of each of the two pins (12) close to the docking posts (19) is provided with a rectangular hole (121), and the two rectangular clamping blocks (191) are respectively inserted into the two rectangular holes (121).

4. A non-return valve according to claim 1, characterized in that an extension plate (151) is fixedly connected to the outer wall of both valve flaps (15).

5. The check valve according to claim 1, wherein the outer ring plate (11) is provided with a plurality of through holes (111), and the mounting bolts (6) are located in the through holes (111).

6. A non-return valve according to claim 1, characterized in that the mounting flange (5) is provided with a recess (501), and the mounting bolts (6) are located in the recess (501).

7. A non-return valve according to claim 1, characterized in that the length of the abutment post (19) is greater than the length of the spring (18).