CN216045639U

CN216045639U - Double-guide explosion-proof wave silencing check valve

Info

Publication number: CN216045639U
Application number: CN202122111731.1U
Authority: CN
Inventors: 徐辉; 杨建宁
Original assignee: Ningbo Tianhu Valve Technology Co ltd
Current assignee: Ningbo Tianhu Valve Technology Co ltd
Priority date: 2021-09-03
Filing date: 2021-09-03
Publication date: 2022-03-15
Anticipated expiration: 2031-09-03

Abstract

The utility model discloses a double-guide explosion-proof wave silencing check valve, which belongs to one of pipeline valves and comprises a valve body, a valve cavity in the valve body, a water through hole, a valve clack, a valve rod and the like in the valve cavity, wherein the valve clack is mainly arranged in the middle of the valve rod and drives the valve rod to move synchronously; therefore, the double-guide movable sealing opening and closing of the valve rod and the valve clack are realized, so that the axial movement offset problem of the valve rod after long-term use is solved, the sealing failure is avoided, and the check valve is suitable for vertical and horizontal installation without influencing the sealing precision; meanwhile, the valve rod is provided with a limiting block to limit the moving stroke of the valve rod, namely, the defect that a valve clack is accidentally blocked when opened and closed in the traditional structure is overcome by limiting the moving height of the valve rod; in addition, the sealing surface of the valve clack is built-up by stainless steel, so that sealing failure caused by medium corrosion is avoided.

Description

Double-guide explosion-proof wave silencing check valve

Technical Field

The utility model relates to a check valve in a pipeline valve, in particular to a double-guide explosion-proof wave silencing check valve.

Background

At present, the structure of an explosion wave-proof silencing check valve mainly comprises a valve body, a valve cavity in the valve body, a water through hole in the valve cavity, a valve clack, a valve rod and the like, wherein the valve clack is arranged on the valve rod and is pushed and moved in a two-way manner by elasticity and water inlet pressure to seal and open the water through hole; wherein, the end part of the valve rod is usually provided with a guide hole structure for guiding; however, only one end of the valve rod is provided with the guide hole, and the valve rod with the double-guide design is not provided; therefore, the single-guide valve rod is only suitable for vertical installation, certain sealing precision influence exists on horizontal installation, and axial movement offset of the valve rod can be caused after long-term use, so that sealing failure is caused; meanwhile, the traditional anti-explosion wave silencing check valve has the defects that the movement of the valve rod is not limited, namely the valve clack is accidentally blocked due to the fact that the movement height of the valve rod cannot be limited; in addition, the sealing effect between the valve clack and the water through hole is poor, and the sealing surface is easy to cause sealing failure due to medium corrosion.

Disclosure of Invention

The utility model aims to overcome the defects of the prior art and provide the double-guide explosion-proof wave silencing check valve which can realize the opening and closing of double-guide sealing, prevent the valve flap from being accidentally stuck by limiting the moving height of the valve rod and has better sealing effect.

The technical problem of the utility model is realized by the following technical scheme:

a double-guide explosion-proof wave silencing check valve comprises a valve body, a valve cavity in the valve body, a water through hole, a valve clack and a valve rod, wherein the water through hole, the valve clack and the valve rod are arranged in the valve cavity; two ends of the valve cavity are respectively provided with a guide hole, and two ends of the valve rod respectively penetrate through the guide holes at two ends of the valve cavity to move to form double guide.

The valve cavity is arranged in the valve body in a penetrating mode along the axial direction, and the water through hole in the valve cavity and the guide holes at the two ends of the valve cavity are located on the same axis line with the valve cavity.

The guide hole is arranged on the guide support, and the guide support is integrally formed in the port of the valve cavity or detachably screwed and connected in the port of the valve cavity.

The valve rod is provided with a limiting block, and the limiting block limits the moving stroke of the valve rod.

And a copper sleeve which is in lubrication contact with the valve rod is arranged in the guide hole.

The water through hole is internally provided with a sealing ring, and the valve clack and the sealing ring form sealing contact to open and close.

The sealing surface of the valve clack contacted with the sealing ring adopts stainless steel surfacing welding.

The valve body is provided with a mounting hole communicated with the valve cavity and an explosion wave-proof damping valve hermetically mounted in the mounting hole.

The anti-explosion wave damping valve comprises a damping valve body and a damping piston, wherein the damping valve body is hermetically installed in the installation hole, and the damping piston is arranged in the damping valve body and elastically pushed to seal the installation hole.

The damping piston is arranged in the damping valve body from the rear end of the damping valve body and is sealed in the damping valve body by a detachably connected damping valve cover, and the damping valve cover is provided with a pressure relief hole communicated with the damping valve body.

Compared with the prior art, the utility model mainly installs the valve clack in the middle of the valve rod and drives the valve rod to move synchronously, and the two ends of the valve cavity are respectively provided with the guide holes, and the two ends of the valve rod respectively pass through the guide holes at the two ends of the valve cavity to move to form double guide; therefore, the double-guide movable sealing opening and closing of the valve rod and the valve clack are realized, so that the axial movement offset problem of the valve rod after long-term use is solved, the sealing failure is avoided, and the check valve is suitable for vertical and horizontal installation without influencing the sealing precision; meanwhile, the valve rod is provided with a limiting block to limit the moving stroke of the valve rod, namely, the defect that a valve clack is accidentally blocked when opened and closed in the traditional structure is overcome by limiting the moving height of the valve rod; in addition, the sealing surface of the valve clack is built-up by stainless steel, so that sealing failure caused by medium corrosion is avoided.

Drawings

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

Fig. 2 is an enlarged view of fig. 1 at a.

Fig. 3 is a schematic structural diagram of the anti-explosion damping valve.

Detailed Description

The embodiments of the present invention will be described in detail below with reference to the above drawings.

As shown in fig. 1-3, the valve comprises a valve body 1, a valve cavity 11, a water through hole 12, a mounting hole 13, a guide support 2, a guide hole 21, a copper sleeve 3, a sealing ring 4, an anti-explosion wave damping valve 5, a damping valve body 51, a damping piston 52, a damping valve cover 53, a damping spring 54, a pressure relief hole 55, a valve clack 6, a sealing surface 61, a valve clack spring 7, a valve rod 8, a valve rod 81 and a limiting block.

A double-guide explosion-proof wave silencing check valve belongs to one of pipeline valves, and mainly comprises a valve body 1, a valve cavity 11 in the valve body, a water through hole 12 in the valve cavity, a valve clack 6, a valve rod 8 and the like, wherein two ends of the valve cavity 11, namely an inlet end at the lower part of the valve body and an outlet end at the upper part of the valve body shown in figure 1 are respectively provided with a guide hole 21.

The valve cavity 11 is axially arranged in the valve body 1 in a through mode, and the water through hole 12 in the valve cavity 11 and the guide holes 21 at two ends of the valve cavity are located on the same axial line with the valve cavity 11.

The guide hole 21 is arranged on the guide support 2, and specifically, a plurality of radial spokes uniformly distributed on the periphery of the guide hole 21 on the periphery of the guide support 2 are used for supporting and fixing, the plurality of spokes and the guide hole 21 can form an integrated structure, and the guide support 2 can be integrally formed in a port of the valve cavity 11 as shown in an outlet end of fig. 1, and can also be detachably screwed in the port of the valve cavity 11 as shown in an inlet end of fig. 1.

In addition, a rubber seal ring 4 is provided in the water passage hole 12, and the seal ring is tightly fixed in the water passage hole 12 by a guide bracket 2 detachably screwed and connected in the end of the valve chamber 11.

The valve clack 6 is screwed and installed in the middle of the valve rod 8, anaerobic adhesive is coated before installation to prevent falling, so the valve clack 6 and the valve rod 8 can move synchronously, the valve clack 6 is elastically pushed by a valve clack spring 7 sleeved outside the valve rod 8 to be in close contact with the sealing ring 4, namely the water through hole 12 is sealed and closed, and in order to prevent a sealing surface 61 of the valve clack 6 from being corroded by a medium to cause sealing failure, the sealing surface 61 can be formed by stainless steel surfacing welding.

When the water inlet pressure at the inlet end is greater than the elastic force of the valve clack spring 7, the valve clack 6 is pushed to compress the valve clack spring 7 to open the water through hole 12, and the structure is a typical non-return structure, namely the valve clack 6 is pushed to move in a two-way mode by the elastic force of the valve clack spring 7 and the water inlet pressure to form sealing contact with the sealing ring 4 to open and close the water through hole 12.

Meanwhile, the two ends of the valve rod 8 respectively extend and pass through the guide holes 21 at the two ends of the valve cavity 11 to move to form double guide. Therefore, the double-guide movable sealing opening and closing of the valve rod 8 and the valve clack 6 are realized, the problem of axial movement offset of the valve rod after long-term use is solved, sealing failure is avoided, and the check valve is suitable for vertical and horizontal installation and does not influence sealing precision.

Guiding hole 21 in be equipped with interference fit's copper sheathing 3, this copper sheathing adopts powder metallurgy spare, need make the copper sheathing fully soak in the grease before the assembly to fill the inside space of powder metallurgy spare and have the self-lubricating function, also form lubricated contact between copper sheathing 3 and the valve rod 8 exactly, so can reduce friction when valve rod 8 removes, increase of service life also makes the cooperation of copper material and stainless steel material can not take place the problem of rusty scale moreover.

The valve rod 8 is provided with a limit block 81, the limit block is arranged at the rear part of the valve clack 6, namely above the valve clack as shown in figure 1, and in an actual structure, the outer diameter of the valve rod 8 at the position is only required to be thickened, so that the limit block 81 can limit the moving stroke of the valve rod 8, namely, the defect that the valve clack 6 is accidentally blocked when opened and closed in the traditional structure is overcome by limiting the moving height of the valve rod 8.

In addition, the valve body 1 is provided with a mounting hole 13 communicated with the valve cavity 11 and an anti-explosion wave damping valve 5 which is hermetically mounted in the mounting hole, the anti-explosion wave damping valve comprises a damping valve body 51 which is hermetically mounted in the mounting hole 13 and a damping piston 52 which is arranged in the damping valve body and elastically pushed to the sealing mounting hole 13 by a damping spring 54, specifically, after the damping piston 54 is installed from the rear end of the damping valve body 51, the damping piston is sealed in the damping valve body 51 by a detachably connected damping valve cover 53, and the damping valve cover 53 is provided with a pressure relief hole 55 communicated with the damping valve body 51.

Thus, the damping piston 52 with elastic pretension can buffer the shock wave in the pipeline system to absorb energy, thereby avoiding pipeline vibration, even pipeline burst and equipment damage caused by huge water hammer impulse force to the maximum extent.

The above description is only a specific embodiment of the present invention, and those skilled in the art should understand that any similar structural design to the embodiment is included in the protection scope of the present invention.

Claims

1. A double-guide explosion-proof wave silencing check valve comprises a valve body (1), a valve cavity (11) in the valve body, a water through hole (12) in the valve cavity, a valve clack (6) and a valve rod (8), wherein the valve clack (6) is pushed and moved in two directions by elasticity and water inlet pressure to open and close the water through hole (12) in a sealing way, and the double-guide explosion-proof wave silencing check valve is characterized in that the valve clack (6) is arranged in the middle of the valve rod (8) and drives the valve rod to move synchronously; two ends of the valve cavity (11) are respectively provided with a guide hole (21), and two ends of the valve rod (8) respectively penetrate through the guide holes (21) at two ends of the valve cavity (11) to move so as to form double guide.

2. The double-guide explosion-proof wave silencing check valve as claimed in claim 1, wherein the valve cavity (11) is axially arranged in the valve body (1) in a penetrating manner, and the water through hole (12) in the valve cavity (11) and the guide holes (21) at the two ends of the valve cavity are all positioned on the same axial line with the valve cavity (11).

3. The double guide explosion-proof wave silencing check valve of claim 2, characterized in that the guide hole (21) is arranged on a guide bracket (2) which is integrally formed in the port of the valve cavity (11) or detachably screwed in the port of the valve cavity (11).

4. The double-guide explosion-proof wave noise elimination check valve as recited in claim 1, wherein the valve rod (8) is provided with a stopper (81), and the movement stroke of the valve rod (8) is limited by the stopper.

5. The double guide explosion-proof wave silencing check valve according to claim 1, characterized in that the guide hole (21) is provided with a copper bush (3) in lubrication contact with the valve rod (8).

6. The double-guide explosion-proof wave silencing check valve as claimed in claim 1, wherein a sealing ring (4) is arranged in the water through hole (12), and the valve flap (6) is in sealing contact with the sealing ring (4) to open and close.

7. The double-guide explosion-proof wave silencing check valve according to claim 6, characterized in that the sealing surface (61) of the valve flap (6) contacting the sealing ring (4) is formed by stainless steel overlaying.

8. The double-guide explosion-proof wave silencing check valve according to claim 1, characterized in that the valve body (1) is provided with a mounting hole (13) communicated with the valve cavity (11) and an explosion-proof wave damping valve (5) hermetically mounted in the mounting hole.

9. The double guide explosion wave proof and noise elimination check valve according to claim 8, wherein the explosion wave proof damper valve (5) comprises a damper valve body (51) hermetically installed in the installation hole (13) and a damper piston (52) disposed in the damper valve body and elastically pushed to hermetically seal the installation hole (13).

10. The double-guide explosion-proof wave silencing check valve as recited in claim 8, wherein the damping piston (52) is enclosed in the damping valve body (51) by a detachably connected damping valve cover (53) after being installed from the rear end of the damping valve body (51), and the damping valve cover (53) is provided with a pressure relief hole (55) communicating with the damping valve body (51).