CN216306821U

CN216306821U - Spherical check valve

Info

Publication number: CN216306821U
Application number: CN202123133241.8U
Authority: CN
Inventors: 叶晖; 王青鹤; 林倩; 高锡锋; 马鸽
Original assignee: Kaifeng High And Middle Pressure Valve Co ltd
Current assignee: Kaifeng High And Middle Pressure Valve Co ltd
Priority date: 2021-12-14
Filing date: 2021-12-14
Publication date: 2022-04-15
Anticipated expiration: 2031-12-14

Abstract

The utility model relates to a spherical check valve which comprises a valve body, wherein the inlet end of the valve body and the outlet end of the valve body are respectively positioned at two ends of the valve body, a screw plug is arranged at the top of the valve body between the inlet end of the valve body and the outlet end of the valve body, a valve core guide groove is formed in the valve body between the inlet end of the valve body and the screw plug, a connecting valve cover is arranged at the inlet end of the valve body, a guide cavity and a connecting cavity are arranged on the connecting valve cover, the connecting cavity and the valve core guide groove are communicated through the guide cavity, a spherical valve core is arranged in the guide cavity and the valve core guide groove, and one end of the guide cavity, which is far away from the connecting cavity, is attached to the spherical valve core. The ball valve core is provided with the screw plug, so that the ball valve core can be conveniently detached from the valve body for maintenance and replacement. The utility model has convenient adjustment and use and wide market prospect.

Description

Spherical check valve

Technical Field

The utility model relates to the field of check valves, in particular to a spherical check valve.

Background

The check valve is a valve with a circular valve clack and acts by self weight and medium pressure to block the medium from flowing backwards. It belongs to the automatic valve category, also called check valve, reflux valve or isolation valve. The valve clack motion mode is divided into lifting type and swing type. The lift check valve is similar in structure to the stop valve and only lacks a valve rod that drives the valve flap. The medium flows in from the inlet end (lower side) and flows out from the outlet end (upper side). The valve is opened when the inlet pressure is greater than the sum of the weight of the flap and its flow resistance. Otherwise, the valve is closed when the medium flows backwards. Swing check valves have a flap that is tilted and can pivot, and operate on a similar principle to lift check valves.

The check valve applied to the gas medium has relatively low viscosity and relatively high system pressure, the sealing surface of the check valve is easily worn or damaged in the process of opening and closing the check valve for many times, when the check valve is worn or damaged, the gas medium at the downstream of the check valve easily enters the upstream gas medium or enters an external environment system to cause danger, but in the maintenance process of the existing check valve after being worn or damaged, the whole valve body is often required to be dismounted for maintenance, and the structure of the existing check valve is generally complex relatively, so that the time is usually consumed and the efficiency is influenced relatively long in the maintenance process.

Disclosure of Invention

Aiming at the defects in the prior art, the utility model provides the novel multifunctional electric heating cooker which is simple in structure and convenient to maintain and is used for overcoming the defects in the prior art.

The technical scheme adopted by the utility model is as follows: the inlet end of the valve body and the outlet end of the valve body are respectively positioned at two ends of the valve body, a plug screw is arranged on the top of the valve body between the inlet end of the valve body and the outlet end of the valve body, a valve core guide groove is formed in the valve body between the inlet end of the valve body and the plug screw, a connecting valve cover is arranged at the inlet end of the valve body, a guide cavity and a connecting cavity are arranged on the connecting valve cover, the connecting cavity and the valve core guide groove are communicated through the guide cavity, a spherical valve core is arranged in the guide cavity and the valve core guide groove, and one end, far away from the connecting cavity, of the guide cavity is attached to the spherical valve core.

Preferably, the guide cavity adopt a cylindrical cavity, a limiting guide mechanism is arranged on the connecting valve cover, the limiting guide mechanism comprises a slot arranged on the connecting valve cover outside the connecting cavity and a limiting groove arranged on one side of the slot, the limiting groove adopts an arc groove-shaped structure arranged along the slot to the far away from the slot, and the inlet end of the limiting groove is positioned on the side wall above the bottom of the limiting groove, and the guide cavity adopts a circular truncated cone shape towards the partial inner cavity of one end of the connecting cavity.

Preferably, the connecting valve cover and the valve body are fixed through a valve cover bolt, and a first packing sealing ring is arranged between the connecting valve cover and the valve body.

Preferably, a second packing sealing ring is arranged between the screw plug and the valve body.

Preferably, the guide cavity is provided with a leakage-proof valve clack, the leakage-proof valve clack is movably connected with the guide cavity, the inner side end of the leakage-proof valve clack is attached to the inner cavity of the circular truncated cone-shaped part of one end, facing the connection cavity, of the guide cavity, a first limiting fixture block is arranged in a limiting groove in the outer side of the leakage-proof valve clack, and the shape of the first limiting fixture block is matched with that of the limiting groove.

Preferably, the guide cavity on be provided with the air guide joint, the air guide joint adopts the tubular structure that one end is sealed, the air guide joint is provided with the sealed face of the circular platform shape part inner chamber matched with of guide cavity orientation one end of connecting the chamber, air guide joint and direction chamber swing joint, the spacing inslot in the air guide joint outside is provided with the spacing fixture block of second, the shape of the spacing fixture block of second matches with the shape part of spacing groove, the sealing end of air guide joint adopts hemispherical structure, the sealing end of air guide joint is located the valve body, be provided with the air guide hole on the sealing end of air guide joint.

Preferably, the distance between the top surface of the limiting groove and the bottom surface of the limiting groove is gradually reduced along with the increase of the distance between the limiting groove and the slot.

The utility model has the beneficial effects that: firstly, the ball valve core is convenient to disassemble from the valve body for maintenance and replacement due to the screw plug arranged on the check valve, and compared with a check valve with a traditional structure, the check valve is more convenient to disassemble and disassemble.

And a first packing sealing ring is arranged between the connecting valve cover and the valve body, a second packing sealing ring is arranged between the plug screw and the valve body, and the first packing sealing ring and the second packing sealing ring both adopt annular structures made of graphite materials. The first packing sealing ring is arranged, so that the sealing effect between the connecting valve cover and the valve body is improved; and installing a second packing sealing ring, and realizing the sealing effect between the plug screw and the valve body.

Finally, in a closed state, the anti-leakage valve clack is arranged on the connecting cavity, and at the moment, the spherical valve core is attached to one end of the guide cavity far away from the connecting cavity under the self gravity and the push of downstream gas to form a first sealing surface; the inner side end of the anti-leakage valve clack is attached to the inner cavity wall of the circular truncated cone-shaped part of the guide cavity, which faces to one end of the connecting cavity, so that a second sealing surface is formed. Better sealing effect in the closed state

The utility model has the advantages of simple structure, convenient operation, ingenious design, great improvement on the working efficiency, good social and economic benefits and easy popularization and use.

Drawings

FIG. 1 is a schematic structural diagram of the present invention.

Fig. 2 is a schematic structural diagram of the present invention.

Fig. 3 is a schematic structural diagram of the present invention.

Fig. 4 is a schematic structural diagram of the components of the present invention.

Detailed Description

As shown in fig. 1 to 4, a spherical check valve comprises a valve body 1, wherein an inlet end of the valve body 1 and an outlet end of the valve body 1 are respectively positioned at two ends of the valve body 1, a screw plug 2 is arranged at the top of the valve body 1 between the inlet end of the valve body 1 and the outlet end of the valve body 1, the screw plug 2 is in threaded connection with the valve body 1, a valve core guide groove 3 is arranged in the valve body 1 between the inlet end of the valve body 1 and the screw plug 2, a connecting valve cover 4 is arranged at the inlet end of the valve body 1, a guide cavity 5 and a connecting cavity 6 are arranged on the connecting valve cover 4, the guide cavity 5 is positioned between the connecting cavity 6 and the valve core guide groove 3, the connecting cavity 6 is communicated with the valve core guide groove 3 through the guide cavity 5, a spherical valve core 7 is arranged in the guide cavity 5 and the valve core guide groove 3, and one end of the guide cavity 5 far away from the connecting cavity 6 is attached to the spherical valve core 7, the spherical valve core 7 is conveniently detached from the valve body 1 by detaching the screw plug 2 and the emergency cleaning is carried out to realize the quick maintenance.

The connecting valve cover 4 and the valve body 1 are fixed through a valve cover bolt 10, and a first packing sealing ring 11 is arranged between the connecting valve cover 4 and the valve body 1. One end of the connecting valve cover 4 facing the valve body 1 is of a tubular structure, the tubular structure is partially located on the inner side of the valve body 1, a packing limiting ring 12 is sleeved on the part of the tubular structure located on the outer side of the valve body 1, and a first packing sealing ring 11 is installed between the part of the tubular structure located on the outer side of the valve body 1 and the packing limiting ring 12. And a second packing sealing ring 13 is arranged between the screw plug 2 and the valve body 1. The first packing seal ring 11 and the second packing seal ring 13 are both of an annular structure made of graphite. The first packing seal ring 11 is arranged, so that the sealing effect between the connecting valve cover 4 and the valve body 1 is improved; and installing a second packing sealing ring 13 to achieve the sealing effect between the plug screw 2 and the valve body 1.

Guide chamber 5 adopt cylindrical cavity, be provided with spacing guiding mechanism on connecting valve gap 4, spacing guiding mechanism including seting up the spacing groove 9 of seting up of slot 8 and slot 8 one side on connecting valve gap 4 outside connecting chamber 6, slot 8 adopts the arc groove-shaped structure, spacing groove 9 adopts along being close to slot 8 to keeping away from the arc groove-shaped structure that slot 8 was seted up, the entrance point of spacing groove 9 is located on the lateral wall of spacing groove 9 bottom top guide chamber 5 adopts the round platform shape towards the partial inner chamber of connecting chamber 6's one end.

When the product is closed, the guide cavity 5 is provided with the anti-leakage valve clack 14, the anti-leakage valve clack 14 is movably connected with the guide cavity 5, the inner side end of the anti-leakage valve clack 14 is attached to the inner cavity of the truncated cone-shaped part of one end, facing the connecting cavity 6, of the guide cavity 5, a first limiting fixture block 15 is arranged in the limiting groove 9 on the outer side of the anti-leakage valve clack 14, and the shape of the first limiting fixture block 15 is matched with the shape of the limiting groove 9.

When the product is opened, the guide cavity 5 is provided with an air guide joint 16, the air guide joint 16 adopts a tubular structure with one end sealed, the air guide joint 16 is provided with a sealing surface matched with the inner cavity of the truncated cone-shaped part of one end of the guide cavity 5 facing the connecting cavity 6, a second limiting fixture block 17 is arranged in the limiting groove 9 at the outer side of the air guide joint 16, the shape of the second limiting fixture block 17 is matched with the shape part of the limiting groove 9, the sealing end of the air guide joint 16 adopts a hemispherical structure, the sealing end of the air guide joint 16 is positioned in the valve body 1, part of the groove body at the bottom of the valve core guide groove 3 adopts an arc shape, the spherical valve core 7 adopts a spherical structure, the sealing end of the hemispherical structure of the air guide joint 16 is combined with the arc-shaped groove body at the bottom of the valve core guide groove 3 in the process that the sealing end of the air guide joint 16 gradually extends into the valve body 1, so that the spherical valve core 7 with the spherical structure gradually moves towards the screw plug 2, and the resistance of the opening of the spherical valve core 7 is reduced. The sealed end of the air guide joint 16 is provided with an air guide hole 18. The upstream medium is conveyed to a downstream system of the valve body 1 through the open end of the air guide joint 16, the air guide hole 18 and the outlet end of the valve body 1 in sequence.

The distance between the top surface of the limiting groove 9 and the bottom surface of the limiting groove 9 is gradually reduced along with the increase of the distance between the limiting groove 9 and the slot 8. The shape of the first limiting fixture block 15 and the shape of the second limiting fixture block 17 are matched with the partial shape of the limiting groove 9 respectively. The number of the limiting guide mechanisms is a plurality of, the limiting guide mechanisms are uniformly distributed on the outer side of the central axis of the guide cavity 5 in a star shape, the number of the first limiting fixture blocks 15 and the number of the second limiting fixture blocks 17 are equal to the number of the limiting guide mechanisms respectively, and the stability of the connection between the anti-leakage valve clack 14 and the connection valve cover 4 or between the air guide joint 16 and the connection valve cover 4 is improved. The air guide joint 16 and the connecting valve cover 4 are respectively provided with a driving handle 19, so that the air guide joint 16 or the connecting valve cover 4 can be conveniently detached. The radian of the first limiting fixture block 15 and the radian of the second limiting fixture block 17 are not larger than the radian of the slot 8.

The use method of the product is as follows: as shown in fig. 1 to 4, in the closed state of the product, the leakage-proof valve flap 14 is installed on the connecting cavity 6, and at this time, the spherical valve core 7 is pushed by the self-gravity and the downstream gas to be attached to one end of the guide cavity 5 away from the connecting cavity 6, so as to form a first sealing surface; the inner side end of the leakage-proof valve clack 14 is attached to the inner cavity wall of the truncated cone-shaped part of the guide cavity 5 facing one end of the connecting cavity 6 to form a second sealing surface.

In the opening process, firstly, the driving handle 19 drives the anti-leakage valve clack 14 to rotate towards the direction close to the slot 8, when the first limiting fixture block 15 moves into the slot 8, the rotation is stopped, and then the anti-leakage valve clack 14 is taken down from the connecting cavity 6; then, the open end of the air guide joint 16 is arranged on the upstream air hose, and the sealed end of the air guide joint 16 is gradually inserted into the inner cavity of the valve body 1, in the process, the spherical valve core 7 gradually moves towards the screw plug 2 along the valve core guide groove 3, and after the second limiting fixture block 17 is completely inserted into the slot 8, at the moment, the sealing surface of the air guide joint 16 matched with the inner cavity of the truncated cone-shaped part at one end of the guide cavity 5 towards the connecting cavity 6 is attached to the inner cavity wall of the truncated cone-shaped part at one end of the guide cavity 5 towards the connecting cavity 6 to form sealing; and finally, rotating the air guide joint 16 towards the direction far away from the slot 8 until the second limiting fixture block 17 is completely attached to the limiting groove 9, and finishing the opening process of the product.

By the embodiment, the product is realized by installing the air guide joint 16 on the connecting cavity 6 in the opening state, the sealing effect is better in the closing state realized by installing the anti-leakage valve clack 14 on the connecting cavity 6 and combining the double sealing of the joint of the spherical valve core 7 and one end of the guide cavity 5 far away from the connecting cavity 6, at the same time, the wearing state of the air guide joint 16 and the anti-leakage valve clack 14 can be easily observed in daily maintenance to judge the wearing state of the inner cavity of the truncated cone-shaped part of the guide cavity 5 towards one end of the connecting cavity 6, and then arrange necessary man-hour and in time maintain, be provided with plug screw 2 on this product simultaneously and conveniently dismantle out ball valve core 7 from valve body 1 and maintain and change, need dismantle whole product when the maintenance for the check valve of traditional structure, this product is more convenient when the maintenance.

The utility model is a spherical check valve which meets the needs of workers in the field of check valves, so that the utility model has wide market prospect.

Claims

1. A spherical check valve which characterized in that: comprises a valve body (1), the inlet end of the valve body (1) and the outlet end of the valve body (1) are respectively positioned at the two ends of the valve body (1), a screw plug (2) is arranged on the top of the valve body (1) between the inlet end of the valve body (1) and the outlet end of the valve body (1), a valve core guide groove (3) is arranged in the valve body (1) between the inlet end of the valve body (1) and the screw plug (2), the valve is characterized in that a connecting valve cover (4) is arranged at the inlet end of the valve body (1), a guide cavity (5) and a connecting cavity (6) are arranged on the connecting valve cover (4), the connecting cavity (6) and the valve core guide groove (3) are communicated through the guide cavity (5), a spherical valve core (7) is arranged in the guide cavity (5) and the valve core guide groove (3), and one end, far away from the connecting cavity (6), of the guide cavity (5) is attached to the spherical valve core (7).

2. The ball check valve as set forth in claim 1, wherein: guide chamber (5) adopt cylindrical cavity, be provided with spacing guiding mechanism on connecting valve gap (4), spacing guiding mechanism including seting up spacing groove (9) of seting up on slot (8) and slot (8) one side on connecting valve gap (4) outside connecting chamber (6), spacing groove (9) adopt along being close to slot (8) to keeping away from the arc trough-shaped structure that slot (8) were seted up, the entrance point of spacing groove (9) is located guide chamber (5) adopts the round platform shape towards the partial inner chamber of the one end of connecting chamber (6) on the lateral wall of spacing groove (9) bottom top.

3. The ball check valve as set forth in claim 1, wherein: the connecting valve cover (4) and the valve body (1) are fixed through a valve cover bolt (10), and a first packing sealing ring (11) is arranged between the connecting valve cover (4) and the valve body (1).

4. The ball check valve as set forth in claim 1, wherein: and a second packing sealing ring (13) is arranged between the screw plug (2) and the valve body (1).

5. The ball check valve as set forth in claim 2 wherein: the anti-leakage valve is characterized in that an anti-leakage valve clack (14) is arranged on the guide cavity (5), the anti-leakage valve clack (14) is movably connected with the guide cavity (5), the inner side end of the anti-leakage valve clack (14) is attached to the inner cavity of the circular truncated cone-shaped part of one end, facing the connection cavity (6), of the guide cavity (5), a first limiting clamping block (15) is arranged in a limiting groove (9) in the outer side of the anti-leakage valve clack (14), and the shape of the first limiting clamping block (15) is matched with the shape of the limiting groove (9).

6. The ball check valve as set forth in claim 2 wherein: the air guide valve is characterized in that an air guide joint (16) is arranged on the guide cavity (5), the air guide joint (16) is of a tubular structure with one end sealed, a sealing surface matched with an inner cavity of a circular table-shaped part of one end, facing the connecting cavity (6), of the guide cavity (5) is arranged on the air guide joint (16), the air guide joint (16) is movably connected with the guide cavity (5), a second limiting clamping block (17) is arranged in a limiting groove (9) on the outer side of the air guide joint (16), the shape of the second limiting clamping block (17) is matched with the shape of the limiting groove (9), the sealing end of the air guide joint (16) is of a hemispherical structure, the sealing end of the air guide joint (16) is located in the valve body (1), and an air guide hole (18) is formed in the sealing end of the air guide joint (16).

7. The ball check valve as set forth in claim 2 wherein: the distance between the top surface of the limiting groove (9) and the bottom surface of the limiting groove (9) is gradually reduced along with the increase of the distance between the limiting groove (9) and the slot (8).