CN218326403U - Pressure relief structure and pressure reducing valve comprising same - Google Patents

Abstract

The utility model belongs to the technical field of the valve, and a pressure relief structure reaches relief pressure valve including this pressure relief structure is disclosed, and pressure relief structure includes case frame, valve rod, valve clack and valve disc, and the valve rod is vertical to be worn to establish in the case frame, and its upper end and case frame up end butt, and the valve clack is connected to its lower extreme, and the valve clack setting is outside at the case frame: an inner hole is formed in the lower end face of the valve clack, an elastic piece, a sealing piece and a sealing plug are sequentially arranged in the inner hole from the bottom face of the hole to an orifice, a through hole is formed in a rod body at the lower end of the valve rod in the direction perpendicular to the central axis of the rod body, and the through hole is communicated with the inner hole; a through groove is formed in the valve core frame and is communicated with the through hole; the valve disc is installed at the terminal surface of valve clack, closes the hole. The utility model discloses with pressure release structure and valve rod integration in an organic whole, solve the poor problem of current relief valve pressure regulating capacity.

Description

Pressure relief structure and pressure reducing valve comprising same

Technical Field

The utility model belongs to the technical field of the valve, more specifically relates to a pressure relief structure reaches relief pressure valve including this pressure relief structure.

Background

The existing piston pressure reducing valve has a complex structure and a large volume, and cannot release pressure when the pressure of an outlet rises, and when a downstream product is closed, the pressure behind the valve is easy to rise quickly to generate water hammer, so that the downstream product is damaged. The pressure reducing device of the existing pressure reducing valve generally adopts a two-stage pressure reducing structure, the processing and the assembly are complex, and the movable limiting hole cavity of the valve rod is longer, so that the friction force of the valve rod in the up-and-down movement is larger, and the pressure reducing sensitivity is influenced.

For example, patent CN104633206a discloses a filter type piston pressure reducing valve, which includes a valve body having an inlet and an outlet, and a valve core assembly disposed in the valve body, wherein a medium channel for communicating the inlet and the outlet is disposed in the valve body, the medium channel is provided with a choke, the valve core assembly corresponds to the choke, the valve core assembly includes a valve core frame fixed in the valve body, a valve rod disposed in the valve core frame and moving up and down relative to the valve core frame, and a valve flap disposed at the lower end of the valve rod and moving up and down along with the valve rod to change the medium channel and the medium flow, a sealing device is disposed between the valve rod and the valve core frame to isolate the upper and lower parts of the valve core frame, and a pressure reducing structure for reducing the medium pressure in the medium channel is disposed between the lower part of the valve core frame and the valve rod. In the pressure reducing valve disclosed in patent CN102313054B, a single-spring internal-adjusting structure is adopted, and by changing the throttling area, the flow rate and the kinetic energy of the fluid are changed, so that different pressure losses are caused, the outlet pressure is automatically kept constant, the lower end of the valve disc does not have any pressure reducing function, when the outlet pressure is abnormally increased, the pressure cannot be relieved, and when a downstream product is closed, the pressure behind the valve is easily and rapidly increased to generate a water hammer, so that the downstream product is damaged.

In a word, the pressure reducing valve disclosed by the patents has the advantages that only the pressure reducing structure at the upper end of the valve rod is adopted, the pressure reducing function is limited, or the pressure reducing spring is arranged at one end of the valve disk through the sleeve, the spring is positioned through the boss on the inner side of the valve body to form the pressure reducing structure, the valve rod is required to be designed to be very long in a single positioning mode, the size of the whole valve body is large, and the pressure adjustable range of the whole pressure reducing valve structure is also limited.

SUMMERY OF THE UTILITY MODEL

To the defect of prior art, an object of the utility model is to provide a pressure relief structure reaches relief pressure valve including this pressure relief structure, mainly solve current relief pressure valve pressure regulating ability poor, can not fine avoid the problem that the valve is interior unusually steps up.

In order to achieve the above object, the utility model provides a pressure relief structure, pressure relief structure includes case frame, valve rod, valve clack and valve disc, the valve rod is vertical to be worn to establish in the case frame, and its upper end with case frame up end butt, its lower extreme is connected the valve clack, just the valve clack is located outside the case frame:

an inner hole is formed in the lower end face of the valve clack, a first elastic piece, a sealing piece and a sealing plug are sequentially arranged in the inner hole from the bottom face of the hole to an orifice, a through hole is formed in a rod body at the lower end of the valve rod in the direction perpendicular to the central axis of the rod body, and the through hole is communicated with the inner hole;

a through groove is formed in the valve core frame and is communicated with the through hole;

the valve disc is arranged on the end face of the valve clack and seals the inner hole.

Furthermore, the valve core frame is of a multi-boss hollow cylinder structure, and the part of the valve rod penetrating in the valve core frame is of a cylindrical multi-boss structure matched with the valve core frame.

Furthermore, the direction from the bottom surface of the hole to the orifice of the inner hole comprises three sections of round holes with diameters from small to large, one end of the first elastic piece abuts against the bottom surface of the round hole with the smallest diameter, the other end of the first elastic piece is in contact with the sealing piece, the sealing piece can compress the first elastic piece to the length of the round hole with the smallest diameter, and the sealing plug is installed in the round hole with the largest diameter and limits the sealing piece in the middle round hole.

Furthermore, the through hole is vertically intersected with the central axis of the inner hole.

According to another aspect of the invention, a pressure reducing valve is further disclosed, the pressure reducing valve comprises a valve body and the pressure relief structure as described in any one of the above, the valve body comprises an inlet, a cavity and an outlet which are communicated in sequence, the cavity is arranged on the side surface of the valve body, and the pressure relief structure is assembled in the cavity and can reciprocate therein to regulate the flow of fluid which enters the valve body from the inlet and flows out of the outlet after flowing through the cavity.

Furthermore, a main elastic piece is arranged in the cavity, one end of the main elastic piece abuts against the bottom surface of the cavity, and the other end of the main elastic piece abuts against the upper end of the valve rod.

Furthermore, a stop structure is further arranged in the middle of the inner side of the cavity, and the upper end face of the valve core frame abuts against the stop structure.

Furthermore, a height adjusting element of the main elastic piece is further arranged on the bottom surface of the cavity, and one end of the main elastic piece abuts against the height adjusting element.

Further, a valve rear port is formed in the side face, opposite to the cavity, of the valve body, and a valve rear convex cover is mounted on the valve rear port to seal the valve rear port;

and a second elastic piece and a piston are arranged in the rear convex cover of the valve, one end of the second elastic piece is abutted against the inner bottom surface of the rear convex cover of the valve, the other end of the second elastic piece is abutted against the piston, and the piston is limited in the convex cover and can compress the second elastic piece.

Further, a stop piece is arranged on the edge of the opening of the rear convex cover of the valve, and the stop piece limits the piston in the rear convex cover of the valve.

Through the utility model discloses above technical scheme who thinks about compares with prior art, mainly possesses following advantage:

1. the utility model discloses a pressure relief structure and valve rod are integrated in an organic whole, the valve rod lower extreme has a step hole, the spring is equipped with to the inside, sealing member and sealed end cap, it has rubber packing pad and forms one-way seal structure to vulcanize on the sealed end cap, there is a through-hole in the middle of the sealed end cap, the valve rod middle part has a through-hole perpendicular with the through-hole of lower extreme, the medium can circulate, when the relief pressure valve normally works, the ball sealer is sealed with sealed end cap under the effect of spring and upper reaches medium pressure, thereby carry out normal decompression, when the pipeline is unusually boosted behind the valve, valve rear end pressure is higher than upper reaches pressure, the pressure release is opened in the ball rebound, relevant equipment behind the protection valve.

2. The utility model discloses a port behind the valve still is provided with on the valve body, installs the protruding lid behind the valve on the port behind the valve, is provided with elastic component and piston in the protruding lid behind the valve as buffer structure, and elastic component one end supports and leans on the bottom surface in the protruding lid behind the valve, the other end and piston butt, and the piston restriction can compress the elastic component in the protruding lid, and when the fluid was raised pressure unusually behind the valve, piston compression elastic component produced the buffering space, and relevant equipment is impaired behind avoiding valve body or the valve.

3. The utility model discloses an installation pressure release structure still is provided with main elastic component in the cavity, still is provided with the altitude mixture control component between main elastic component and the cavity bottom surface, and it can adjust the height of main elastic component to adjust the effort between main elastic component and the pressure release structure, and then adjust pressure release structure's pressure release ability.

Drawings

FIG. 1 is a top view of an embodiment of the present invention;

fig. 2 is a schematic view of the overall structure of the pressure relief structure in the embodiment of the present invention;

fig. 3 is a cross-sectional view of the pressure relief structure according to the direction B-B in fig. 1 in the embodiment of the present invention;

fig. 4 is a cross-sectional view of a pressure relief valve in an embodiment of the invention;

FIG. 5 is a top view of a rear convex cover of the valve in an embodiment of the present invention;

FIG. 6 is a schematic structural view of a rear convex cover of the valve according to an embodiment of the present invention;

fig. 7 isbase:Sub>A cross-sectional view of the rear convex cover of the valve according to the directionbase:Sub>A-base:Sub>A in fig. 5 in the embodiment of the present invention.

In the figure: 1-a first elastic part, 2-a first sealing part, 3-a sealing plug, 4-a valve port end cover, 5-a second elastic part, 6-a piston, 7-a stop part, 8-a second sealing part, 9-a valve disc, 10-a valve body, 101-an inlet, 102-an outlet, 103-a cavity, 1031-a stop structure, 1032-a height adjusting element, 11-a rectangular sealing ring, 12-a valve core frame, 121-a through groove, 13-a valve rod, 131-an inner hole, 132-a through hole, 14-a first sealing washer, 15-a second sealing washer, 16-a main elastic part and 17-an end cover.

Detailed Description

In order to make the objects, technical solutions and advantages of the present invention more clearly understood, the present invention will be further described in detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are for purposes of illustration only and are not intended to limit the invention.

Example 1

As shown in fig. 1 to 3, the pressure relief structure provided in this embodiment includes a valve core frame 12, a valve rod 13, a valve flap 22 and a valve disc 9, wherein the valve rod 13 vertically penetrates through the valve core frame 12, an upper end of the valve rod is abutted against an upper end surface of the valve core frame 12, a lower end of the valve rod is connected to the valve flap 22, and the valve flap 22 is limited outside the valve core frame 12.

The lower end face of the valve flap 22 is provided with an inner hole 131, the inner hole 131 is sequentially provided with a first elastic element 1, a first sealing element 2 and a sealing plug 3 from the hole bottom face to the hole opening, a through hole 132 is formed in the lower end rod body of the valve rod 13 in a direction perpendicular to the central axis of the lower end rod body, the through hole 132 is communicated with the inner hole 131, and in a preferred embodiment, the through hole 132 is perpendicular to the central axis of the inner hole 131.

The valve core frame 12 is provided with a through groove 121, and the through groove 121 is communicated with the through hole 132.

The valve disc 9 is arranged on the end face of the valve clack 22 to seal the inner hole 131, and a rectangular sealing ring 11 is arranged between the valve disc and the inner hole.

In a preferred embodiment, the valve core frame 12 is a multi-boss hollow cylinder structure, the portion of the valve rod 13 penetrating the valve core frame 12 is a cylindrical multi-boss structure matching with the valve core frame 12, and sealing gaskets are arranged between the contact surfaces of the multi-boss hollow cylinder structure and the cylindrical multi-boss structure for sealing, and in some embodiments, a first sealing gasket 15 close to the upper end contact surface and a second sealing gasket 14 close to the lower end contact surface are arranged between the multi-boss hollow cylinder structure and the cylindrical multi-boss structure.

In a preferred embodiment, the direction from the bottom surface of the hole to the orifice of the inner hole 131 includes three sections of round holes with diameters from small to large, one end of the first elastic element 1 abuts against the bottom surface of the round hole with the smallest diameter, the other end of the first elastic element contacts with the first sealing element 2, the first sealing element 2 can compress the first elastic element 1 to the length of the round hole with the smallest diameter, the sealing plug 3 is installed in the round hole with the largest diameter, the first sealing element 2 is limited in the middle round hole, in other preferred embodiments, the first sealing element 2 is a sealing ball, a rubber sealing gasket is vulcanized on the sealing plug 3 to form a one-way sealing structure, and the first elastic element 1 is a spring.

In a preferred embodiment, a sealing member is arranged between the surfaces of the valve rod 13 and the valve core frame 12, and as a more preferred embodiment, an O-shaped sealing ring 15 is arranged at the upper end of the joint of the valve rod 13 and the valve core frame 12 for sealing, and an O-shaped sealing ring 14 is arranged at the lower end of the joint of the valve rod 13 and the valve core frame for sealing.

When relief pressure valve normally works, first sealing member 2 realizes normally working decompression with sealed end cap 3 under the effect of first elastic component 1 and upstream fluid medium pressure, when pipeline is unusually boosted behind the valve, valve back pressure is higher than valve upstream pressure, because through-hole 132, hole 131 and logical groove 121 intercommunication form the pressure release passageway, consequently first sealing member 2 upwards compression spring motion under the fluid medium effect, thereby buffering water hammer and through the pressure release passageway pressure release, play the effect of the relevant equipment behind the protection valve.

Example 2

As shown in fig. 4, the pressure reducing valve provided for this embodiment includes a valve body 10 and a pressure relief structure as described in any one of the foregoing, the valve body 10 includes an inlet 101, an outlet 102 and a cavity 103 disposed on a side surface of the valve body, the cavity 103 is communicated with the inlet 101 and the outlet 102, and the pressure relief structure is assembled in the cavity 103 and can perform reciprocating piston motion along a central axis direction of the cavity 103, so as to adjust a fluid velocity between the inlet 101 and the outlet 102.

In a preferred embodiment, a main elastic member 16 is further disposed in the cavity 103, one end of the main elastic member 16 abuts against the bottom surface of the cavity 103, and the other end abuts against the upper end of the valve rod 13. In other preferred embodiments, the main elastic element 16 is a spring, the upper end of the valve rod 13 is in a structure in which the boss diameter is increased from top to bottom, and one end of the spring is sleeved on the boss with the smaller diameter at the end of the valve rod 13 and abuts against the end face of the adjacent boss with the larger diameter. In the preferred embodiment, the bottom of the chamber 103 is a removable end cap 17 that closes the chamber 103 by screwing or snapping.

In a preferred embodiment, a stop structure 1031 is further disposed at a middle portion inside the cavity 103, and an upper end surface of the valve core frame 12 abuts on the stop structure 1031, so that the primary elastic member 16 can maintain a certain length.

As a preferred embodiment, a height adjusting element 1032 of the main elastic element 16 is further disposed on the bottom surface of the cavity 103, and one end of the main elastic element 16 abuts on the height adjusting element 1032, and the height adjusting element may be any element capable of changing the height of the main elastic element 16 in the cavity 13, such as an adjusting screw, an adjusting screw rod, and the like, and in this embodiment, the adjusting screw is preferred.

As a preferred embodiment, as shown in fig. 5-7, a side surface of the valve body 10 opposite to the cavity 103 is further provided with a valve rear port, the valve rear port is coaxial with the cavity 103, a valve rear convex cover 4 is mounted on the valve rear port to close the valve rear port, a second sealing member 8 is further disposed between surfaces of the valve port end cover 4 contacting the valve body 10, and the second sealing member 8 is a sealing gasket. The rear valve convex cover is a cover body with a cavity, a second elastic part 5 and a piston 6 are arranged in the cavity, the second elastic part 5 is a spring in the embodiment, one end of the second elastic part abuts against the inner bottom surface of the rear valve convex cover 4, the other end of the second elastic part abuts against the piston 6, and if a rear valve water hammer is generated, the piston 6 can be pressed to the inner bottom surface of the rear valve convex cover 4, so that the buffering effect is realized. In the preferred embodiment, the valve port has internal threads, and the rear convex cover 4 has external threads matching with the internal threads, and the two are assembled into a whole by screwing.

In a preferred embodiment, the inner side edge of the cavity of the rear convex cover 4 of the valve is further provided with a stop member 7, the stop member 7 limits the piston 6 in the rear convex cover 4 of the valve, in another preferred embodiment, the stop member is an O-ring, the inner side edge of the cavity of the rear convex cover 4 of the valve is provided with a groove, a part of the O-ring is embedded into the groove, and a part of the non-embedded O-ring protrudes out of the inner side wall of the rear convex cover 4 of the valve, so that the piston can be stopped in the rear convex cover 4 of the valve.

Piston 6 is stabilized in a position under pressure and the effect of second elastic component 5 behind the valve, and when the consumer closed suddenly behind the valve and produced the water hammer, can promote the piston that sets up in the valve end cover and move to compression spring down, play the effect of buffering water hammer to prevent the damage of case and valve after-poppet equipment and pipeline etc..

The above description is only exemplary of the present invention and should not be taken as limiting the scope of the present invention, as any modifications, equivalents, improvements and the like made within the spirit and principles of the present invention are intended to be included within the scope of the present invention.

Claims (10)

1. The utility model provides a pressure relief structure, pressure relief structure includes case frame (12), valve rod (13), valve clack (22) and valve disc (9), valve rod (13) are vertical to be worn to establish in case frame (12), and its upper end with case frame (12) up end butt, its lower extreme is connected valve clack (22), just valve clack (22) are located the outside of case frame (12), its characterized in that:

an inner hole (131) is formed in the lower end face of the valve clack (22), a first elastic piece (1), a first sealing piece (2) and a sealing plug (3) are sequentially arranged in the inner hole (131) from the hole bottom face to the hole opening, and the valve disc (9) is installed on the end face of the valve clack (22) to seal the inner hole (131); a through hole (132) is formed in the rod body at the lower end of the valve rod (13) in the direction perpendicular to the central axis of the rod body, the through hole (132) is communicated with the inner hole (131), a through groove (121) is formed in the valve core frame (12), and the through groove (121) is communicated with the through hole (132) to form a pressure relief channel.

2. The pressure relief structure according to claim 1, wherein the valve core frame (12) is a multi-boss hollow cylinder structure, and the portion of the valve rod (13) penetrating through the valve core frame (12) is a cylindrical multi-boss structure matched with the valve core frame (12).

3. The pressure relief structure according to claim 1, wherein the direction from the bottom surface of the hole to the orifice of the inner hole (131) comprises three sections of round holes with diameters from small to large, one end of the first elastic member (1) abuts against the bottom surface of the round hole with the smallest diameter, the other end of the first elastic member is in contact with the first sealing member (2), the first sealing member (2) can compress the first elastic member (1) to the length of the round hole with the smallest diameter, and the sealing plug (3) is installed in the round hole with the largest diameter to limit the first sealing member (2) in the middle round hole.

4. The pressure relief structure of claim 1, wherein said through hole (132) intersects a central axis of said inner bore (131) perpendicularly.

5. A pressure relief valve comprising a valve body (10) and a pressure relief structure according to any of claims 1-4, said valve body (10) comprising an inlet (101), a chamber (103) and an outlet (102) in series, said chamber (103) being disposed laterally of the valve body, said pressure relief structure being mounted within said chamber (103) and being reciprocable therein to regulate the flow of fluid from said inlet (101) into said valve body (10) and out of said outlet (102) after passing through said chamber (103).

6. A pressure reducing valve according to claim 5, characterized in that a primary elastic member (16) is further arranged in the cavity (103), one end of the primary elastic member (16) abuts against the bottom surface of the cavity (103), and the other end abuts against the upper end of the valve rod (13).

7. A pressure reducing valve according to claim 6, characterized in that a stop structure (1031) is further provided at the middle inside the cavity (103), and the upper end surface of the valve core frame (12) abuts against the stop structure (1031).

8. A pressure-reducing valve according to claim 6, characterized in that the bottom surface of the chamber (103) is further provided with a height-adjusting element (1032) of the primary elastic member (16), and one end of the primary elastic member (16) abuts against the height-adjusting element (1032).

9. The pressure reducing valve according to claim 5, characterized in that the side of the valve body (10) opposite to the cavity (103) is further provided with a valve rear port, and a valve rear convex cover (4) is arranged on the valve rear port to seal the valve rear port;

and a second elastic piece (5) and a piston (6) are arranged in the rear convex cover (4) of the valve, one end of the second elastic piece (5) abuts against the inner bottom surface of the rear convex cover (4) of the valve, the other end of the second elastic piece abuts against the piston (6), and the piston (6) is limited in the convex cover (4) and can compress the second elastic piece (5).

10. A pressure relief valve according to claim 9, characterized in that the edge of the valve rear cover (4) is provided with a stop (7), the stop (7) limiting the piston (6) within the valve rear cover (4).

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