CN217056485U

CN217056485U - A pilot operated relief valve for natural gas

Info

Publication number: CN217056485U
Application number: CN202221062887.3U
Authority: CN
Inventors: 宋浩
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-05-06
Filing date: 2022-05-06
Publication date: 2022-07-26
Anticipated expiration: 2032-05-06

Abstract

The utility model discloses a guide's formula relief valve for natural gas relates to relief valve technical field, which comprises a valve body, still include the valve gap, a valve core, the slide bar, a spring, first spacing piece, blast pipe and bolt, the lower extreme of valve body is equipped with inlet channel, the upper end of valve body is equipped with the valve gap, the holding tank has been seted up on the inner wall of valve gap, the upper end of valve gap is equipped with the bolt, bolt one end is passed the valve gap and is located the holding tank, the inside of valve body is equipped with the slide bar, the upper end and the one end of bolt of slide bar are connected, the outer fringe cover of slide bar is equipped with case and spring, slide bar endwise slip can be followed to the case, the upper end of slide bar is equipped with first spacing piece, the one end and the first spacing piece of spring are connected, the other end and the case of spring are connected, be equipped with at least one blast pipe on the periphery wall of valve body. The stability of the valve core can be guaranteed through the arranged sliding rod, the condition of inclination or excessive deformation cannot occur, and the sealing effect between the valve core and the sleeve in the valve body can be guaranteed.

Description

Pilot operated safety valve for natural gas

Technical Field

The utility model relates to relief valve technical field especially involves a guide's formula relief valve for natural gas.

Background

The pilot operated safety valve is suitable for being installed on a pipeline and a pressure container, and adopts an automatic pressure relief mode, so that the internal pressure of the pipeline and the internal pressure of the pressure container are within a safe pressure difference with the external pressure difference, and the safety of the pipeline and the container is further ensured.

The existing pilot-operated safety valve is characterized in that a valve core and a spring are arranged in a valve body, the valve core is extruded by the elastic force of the spring, so that the valve core seals an air inlet on the valve body, however, the spring is flexible, the direction is changeable, when the stress of the valve core is uneven, the structure of the valve core is easy to be unstable, the sealing effect of the valve core and the valve body is difficult to guarantee, and the pressure relief function during overpressure can be influenced.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a pilot operated relief valve for natural gas for solve above-mentioned technical problem.

The utility model adopts the technical scheme as follows:

a pilot operated safety valve for natural gas comprises a valve body, a valve cover, a valve core, a sliding rod, a spring, a first limiting sheet, an exhaust pipe and a bolt, the lower end of the valve body is provided with an air inlet channel, the upper end of the valve body is provided with the valve cover, the inner wall of the valve cover is provided with a holding tank, the upper end of the valve cover is provided with the bolt, one end of the bolt penetrates through the valve cover and is positioned in the accommodating groove, the sliding rod is arranged in the valve body, the upper end of the sliding rod is connected with one end of the bolt, the outer edge of the sliding rod is sleeved with the valve core and the spring, the valve core can axially slide along the sliding rod, the upper end of the sliding rod is provided with the first limiting sheet, one end of the spring is connected with the first limiting sheet, the other end of the spring is connected with the valve core, and the peripheral wall of the valve body is provided with at least one exhaust pipe.

Preferably, the valve further comprises a sleeve, a valve seat is arranged on the inner wall of the lower end of the valve body, the valve seat portion extends in the axial direction of the air inlet channel, the sleeve is arranged at the upper end of the valve seat, and the valve core is slidably arranged in the sleeve.

Preferably, the outer circumferential wall of the sleeve is provided with at least one exhaust port.

Preferably, the longitudinal section of the valve core is in a ladder-shaped structure with a narrow top and a wide bottom, a protruding structure is arranged on the outer edge of the lower end of the valve core, and the outer peripheral wall of the protruding structure abuts against the inner peripheral wall of the sleeve.

Preferably, the upper end of the first limiting piece is provided with a connecting portion, the middle of the connecting portion is provided with a through hole, the inner peripheral wall of the through hole is provided with an internal thread, and one end of the bolt can be inserted into the through hole and is in threaded connection with the connecting portion.

Preferably, the valve further comprises a sealing ring, the sealing ring is arranged at the upper end of the valve seat and is positioned on the inner side of the sleeve, and the outer edge of the lower surface of the valve core can abut against the sealing ring.

Preferably, the sliding rod further comprises a second limiting piece, and the second limiting piece is arranged at the lower end of the sliding rod.

Preferably, the valve further comprises a sliding sleeve, a through hole is formed in the middle of the valve core, an installation groove is formed in the inner peripheral wall of the through hole, the sliding sleeve is arranged in the installation groove, and the sliding rod penetrates through the through hole and the sliding sleeve.

Preferably, the sliding sleeve further comprises an O-shaped ring, and the O-shaped ring is arranged between the two ends of the sliding sleeve and the inner wall of the mounting groove.

Preferably, the air inlet pipe comprises a pipeline and a bottom cover connected with the pipeline, and the bottom cover is in threaded connection with the air inlet channel.

The technical scheme has the following advantages or beneficial effects:

the utility model discloses in, through slide bar and spring coupling case, can push away the case along with the atmospheric pressure increase of inlet channel department, make the case can remove along the axial direction of slide bar, and overcome the resistance of spring, when inlet channel department pressure exceeded the settlement pressure, the case can remove to the gas vent upside, realize the pressure release effect, and the slide bar that sets up, make the case remove according to the assigned direction along the slide bar, can guarantee the stability of case, can guarantee the sealed effect between the sleeve in case and the valve body.

Drawings

Fig. 1 is a top view of a pilot operated safety valve for natural gas in accordance with the present invention;

fig. 2 is a front view of a pilot operated safety valve for natural gas in accordance with the present invention;

fig. 3 is a perspective view of a pilot operated safety valve for natural gas in accordance with the present invention;

fig. 4 is a schematic diagram of the internal structure of the pilot operated safety valve for natural gas according to the present invention.

In the figure: 1. a valve body; 2. a valve cover; 3. a valve core; 4. a slide bar; 5. a spring; 6. a first limiting sheet; 7. an exhaust pipe; 8. a bolt; 9. an intake passage; 10. accommodating a tank; 11. a sleeve; 12. a valve seat; 13. an exhaust port; 14. a connecting portion; 15. a seal ring; 16. a second limiting sheet; 17. a sliding sleeve; 18. a bottom cover; 19. a pipeline.

Detailed Description

The technical solutions of the present invention will be described more clearly and completely with reference to the accompanying drawings, and it should be understood 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.

In the description of the present invention, it should be noted that, as the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc. appear, the indicated orientation or positional relationship thereof is based on the orientation or positional relationship shown in the drawings, and is only for convenience of description and simplification of description, but does not indicate or imply that the indicated device or element must have a specific orientation, be constructed and operated in a specific orientation, and thus, should not be construed as limiting the present invention. Furthermore, the appearances of the terms "first," "second," and "third" are only used for descriptive purposes and are not to be construed as indicating or implying relative importance.

In the description of the present invention, it is to be noted that, unless otherwise explicitly specified or limited, the terms "mounted," "connected," and "connected" should be interpreted broadly, e.g., as being either fixedly connected, detachably connected, or integrally connected; can be mechanically or electrically connected; they may be connected directly or indirectly through intervening media, or they may be interconnected between two elements. The specific meaning of the above terms in the present invention can be understood in specific cases to those skilled in the art.

Fig. 1 is a top view of a pilot operated safety valve for natural gas in accordance with the present invention; fig. 2 is a front view of a pilot operated safety valve for natural gas in accordance with the present invention; fig. 3 is a perspective view of a pilot operated safety valve for natural gas in accordance with the present invention; fig. 4 is a schematic diagram of the internal structure of the pilot operated safety valve for natural gas according to the present invention. Referring to fig. 1 to 4, a preferred embodiment is shown, which shows a pilot operated safety valve for natural gas, including a valve body 1, a valve cap 2, a valve core 3, a sliding rod 4, a spring 5, a first limiting plate 6, an exhaust pipe 7 and a bolt 8, wherein the lower end of the valve body 1 is provided with an air inlet channel 9, the upper end of the valve body 1 is provided with the valve cap 2, an accommodating groove 10 is formed on the inner wall of the valve cap 2, the upper end of the valve cap 2 is provided with the bolt 8, one end of the bolt 8 penetrates through the valve cap 2 and is positioned in the accommodating groove 10, the sliding rod 4 is arranged inside the valve body 1, the upper end of the sliding rod 4 is connected with one end of the bolt 8, the outer edge of the sliding rod 4 is sleeved with the valve core 3 and the spring 5, the valve core 3 can axially slide along the sliding rod 4, the upper end of the sliding rod 4 is provided with the first limiting plate 6, one end of the spring 5 is connected with the first limiting plate 6, the other end of the spring 5 is connected with the valve core 3, at least one exhaust pipe 7 is arranged on the peripheral wall of the valve body 1. In the present embodiment, referring to fig. 4, the bonnet 2 is detachably connected to the upper end of the valve body 1, for example, by screw-fitting. The bolt 8 is detachably connected with the sliding rod 4, so that replacement, disassembly, assembly and the like are facilitated. Wherein, the middle part of first spacing piece 6 can set up the screw hole, upper end outer fringe at slide bar 4 can set up the external screw thread, be used for cooperating with the screw hole, be convenient for change the spring 5 of different elasticity, be convenient for satisfy multiple natural gas line's pressure demand, wherein, when the pressure value in inlet channel 9 crescent, pressure among the inlet channel 9 can push case 3 and slide to the direction of keeping away from inlet channel 9 along the axial direction of slide bar 4, the top of the direction that figure 4 shows promptly, case 3 this moment can extrude spring 5 gradually. When the pressure value in the air inlet channel 9 exceeds the set pressure value, the valve core 3 at the moment is in an open state, pressure relief is realized, and when the pressure value is smaller than the set pressure value, the valve core 3 can be automatically closed under the action of the elastic force of the spring 5. In this embodiment, when inlet channel 9 middling pressure increases, can upwards extrude case 3, because case 3 itself has certain elasticity, can be unstable at the in-process that removes, lead to atmospheric pressure to reveal easily, and the slide bar 4 that sets up provides certain holding power for case 3 moves according to appointed direction along slide bar 4, can increase the stability that case 3 removed the in-process, can effectively avoid revealing of atmospheric pressure, guarantee sealed effect. An exhaust pipe 7 is provided to communicate with the inside of the valve body 1.

Further, as a preferred embodiment, the valve further comprises a sleeve 11, a valve seat 12 is arranged on the inner wall of the lower end of the valve body 1, part of the valve seat 12 extends towards the axial direction of the air inlet channel 9, and as shown in fig. 4, the inner side wall of the valve seat extends towards the axial direction of the air inlet channel 9; the sleeve 11 is provided at the upper end of the valve seat 12, and the spool 3 is slidably provided in the sleeve 11. In this embodiment, referring to fig. 4, the sleeve 11 is fixed in the valve body 1, the lower end of the sleeve 11 abuts against the valve seat 12, the upper end of the sleeve 11 abuts against the inner wall of the upper side of the valve body 1, and annular sealing gaskets are respectively disposed at the upper end and the lower end of the sleeve 11 to prevent air pressure from leaking. And the valve core 3 is in interference fit with the inner wall of the sleeve 11 and can slide in the sleeve 11. Referring to fig. 4, the valve seat 12 is annular and has a through hole in the middle for communicating the air inlet passage 9 with the inside of the sleeve 11.

Further, as a preferred embodiment, at least one exhaust port 13 is opened on the outer peripheral wall of the sleeve 11. In this embodiment, referring to fig. 4, the height of the exhaust port 13 may be set as required, and when the valve core 3 moves upward and the bottom of the valve core 3 exceeds the exhaust port 13 or exposes the exhaust port 13, it is described that the pressure value in the intake passage 9 at this time exceeds the set pressure value. And the valve element 3 at this time is in an open state. When the bottom of the valve core 3 does not exceed the exhaust port 13, that is, the bottom of the valve core 3 is located at the lower side of the exhaust port 13, it indicates that the exhaust port 13 is closed at this time, that is, the valve core 3 is in a closed state. The number of the exhaust ports 13 can be set as required, and when the number of the exhaust ports 13 is greater than one, the exhaust ports 13 are ensured to be at the same height.

Further, as a preferred embodiment, the longitudinal section of the valve core 3 is a trapezoidal structure with a narrow top and a wide bottom, a raised structure is provided on the outer edge of the lower end of the valve core 3, and the outer peripheral wall of the raised structure abuts against the inner peripheral wall of the sleeve 11. Referring to fig. 4, the shape of the valve element 3 matches the shape of the housing groove 10, and when the bottom of the valve element 3, i.e., the position of the projection structure, exceeds the vent port 13, the upper end of the valve element 3 partially enters the housing groove 10.

Further, as a preferred embodiment, the upper end of the first position-limiting sheet 6 is provided with a connecting portion 14, a through hole is formed in the middle of the connecting portion 14, internal threads are formed on the inner peripheral wall of the through hole, and one end of the bolt 8 can be inserted into the through hole and connected with the connecting portion 14 in a threaded manner. In this embodiment, the bolt 8 is connected with the connecting portion 14 through threads, so that the detachable function is realized, the sliding rod 4 is convenient to detach or install, and the use is convenient.

Further, as a preferred embodiment, the valve further comprises a sealing ring 15, the upper end of the valve seat 12 is provided with the sealing ring 15, the sealing ring 15 is located inside the sleeve 11, and the outer edge of the lower surface of the valve element 3 can abut against the sealing ring 15. In this embodiment, in the initial state, the valve core 3 may press the sealing ring 15 under the action of the spring 5 to seal the inside of the air inlet passage 9.

Further, as a preferred embodiment, the sliding rod further comprises a second limiting piece 16, and the lower end of the sliding rod 4 is provided with the second limiting piece 16. In this embodiment, the second stopper piece 16 is provided to prevent the valve element 3 from separating from the slide rod 4.

Further, as a preferred embodiment, still include sliding sleeve 17, the middle part of case 3 has seted up the through hole, has seted up the mounting groove on the internal perisporium of through hole, is equipped with sliding sleeve 17 in the mounting groove, and slide bar 4 passes through hole and sliding sleeve 17. In this embodiment, the sliding sleeve 17 and the valve core 3 are both sleeved outside the sliding rod 4, wherein a certain gap is formed between the outer peripheral wall of the sliding rod 4 and the inner peripheral wall of the through hole, and the sliding sleeve 17 is in sliding fit with the sliding rod 4. Through the sliding sleeve 17, the contact area of the valve core 3 and the sliding rod 4 can be reduced, and the sliding of the valve core 3 is facilitated.

Further, as a preferred embodiment, the installation groove further comprises an O-ring, and the O-ring is arranged between both ends of the sliding sleeve 17 and the inner wall of the installation groove. In this embodiment, as shown in fig. 4, the upper and lower ends of the sliding sleeve 17 are provided with O-rings for sealing with the upper inner wall and the lower inner wall of the mounting groove to prevent air pressure leakage.

Further, as a preferred embodiment, the air intake pipe further comprises a pipe 19 and a bottom cover 18 connected with the pipe 19, and the bottom cover 18 is in threaded connection with the air intake channel 9. In this embodiment, the outer peripheral wall of the air inlet channel 9 is provided with external threads for matching with the internal threads on the inner peripheral wall of the bottom cover 18. Wherein, an annular sealing ring is embedded on the lower surface of the air inlet channel 9 and used for sealing between the bottom cover 18 and the air inlet channel 9. Air pressure enters the air inlet channel 9 through the pipeline 19 and enters the sleeve 11 through the air inlet channel 9 to push the valve core 3 to move, when the valve core 3 moves upwards and exceeds the air outlet 13, the pressure relief function is realized, and the air pressure enters the space between the valve body 1 and the sleeve 11 through the air outlet 13 and is then discharged through the exhaust pipe 7.

The above description is only an example of the preferred embodiment of the present invention, and not intended to limit the scope of the present invention, and those skilled in the art should be able to realize the equivalent alternatives and obvious variations of the present invention.

Claims

1. A pilot operated safety valve for natural gas comprises a valve body, and is characterized by further comprising a valve cover, a valve core, a sliding rod, a spring, a first limiting piece, an exhaust pipe and a bolt, wherein an air inlet channel is arranged at the lower end of the valve body, the valve cover is arranged at the upper end of the valve body, an accommodating groove is formed in the inner wall of the valve cover, the bolt is arranged at the upper end of the valve cover, one end of the bolt penetrates through the valve cover and is positioned in the accommodating groove, the sliding rod is arranged inside the valve body, the upper end of the sliding rod is connected with one end of the bolt, the valve core and the spring are sleeved on the outer edge of the sliding rod, the valve core can axially slide along the sliding rod, the first limiting piece is arranged at the upper end of the sliding rod, one end of the spring is connected with the first limiting piece, and the other end of the spring is connected with the valve core, the periphery wall of the valve body is provided with at least one exhaust pipe.

2. The pilot operated relief valve for natural gas as claimed in claim 1, further comprising a sleeve, a valve seat portion extending in the axial direction of said intake passage being provided on an inner wall of a lower end of said valve body, said sleeve being provided at an upper end of said valve seat, said spool being slidably provided in said sleeve.

3. The piloted safety valve for natural gas as in claim 2, wherein said sleeve has at least one exhaust port formed in its peripheral wall.

4. The pilot operated safety valve for natural gas according to claim 2, wherein the longitudinal section of the valve core is in a trapezoidal structure with a narrow top and a wide bottom, the outer edge of the lower end of the valve core is provided with a convex structure, and the outer peripheral wall of the convex structure is abutted against the inner peripheral wall of the sleeve.

5. The pilot operated safety valve for natural gas according to claim 1, wherein a connecting portion is provided at an upper end of said first stopper, a through hole is formed at a middle portion of said connecting portion, an internal thread is provided on an inner peripheral wall of said through hole, and one end of said bolt is inserted into said through hole and threadedly connected to said connecting portion.

6. A pilot operated safety valve for natural gas as claimed in claim 2, further comprising a sealing ring provided at an upper end of said valve seat, said sealing ring being located inside said sleeve, an outer edge of a lower surface of said spool being capable of abutting against said sealing ring.

7. The pilot operated safety valve for natural gas according to claim 1, further comprising a second stopper piece provided at a lower end of the sliding rod.

8. The pilot operated safety valve for natural gas according to claim 1, further comprising a sliding sleeve, wherein a through hole is formed in the middle of the valve core, a mounting groove is formed in the inner peripheral wall of the through hole, the sliding sleeve is arranged in the mounting groove, and the sliding rod passes through the through hole and the sliding sleeve.

9. The piloted safety valve for natural gas as in claim 8, further comprising an O-ring between both ends of the sliding sleeve and the inner wall of the mounting groove.

10. The piloted safety valve for natural gas as in claim 1, further comprising an intake pipe, said intake pipe including a conduit and a bottom cap connected to said conduit, said bottom cap being threadably connected to said intake passage.