1. The utility model provides a pressure release structure of relief valve, includes valve body (1), valve rod (2), valve cap (3) and reset spring (4), valve body (1) and valve cap (3) threaded connection are formed with pressure release chamber (5) of shoulder hole form between valve body (1) and valve cap (3), valve rod (2) set up in pressure release chamber (5), reset spring (4) cover on valve rod (2) and with pressure release chamber (5) terminal surface offset, characterized by: the upper end of the valve rod (2) extends out of the valve cap (3), the end part of the valve rod (2) extending out of the valve cap (3) is provided with a shifting sheet (6), and the upper end surface of the valve cap (3) is provided with a clamping groove (7) capable of clamping the shifting sheet (6).

2. The pressure relief structure of the pressure relief valve according to claim 1, characterized in that: plectrum (6) swivelling joint in the upper end of valve rod (2), draw-in groove (7) block plectrum (6) and restrict plectrum (6) upwards rotation.

3. The pressure relief structure of the pressure relief valve according to claim 2, characterized in that: the clamping groove (7) comprises but is not limited to an annular groove and a fan-shaped groove.

4. The pressure relief structure of the pressure relief valve according to claim 3, characterized in that: an air inlet hole (8) communicated with the pressure relief cavity (5) is formed in the bottom of the valve body (1), and a plurality of exhaust holes (9) which are uniformly distributed and communicated with the pressure relief cavity (5) are formed in the side wall of the valve cap (3).

5. The pressure relief structure of the pressure relief valve according to claim 4, characterized in that: the lower end of the valve rod (2) is provided with a supporting edge (10), and the bottom end face of the valve rod (2) is provided with a plurality of air passing cutting faces (11) which are uniformly distributed according to the circumference.

6. The pressure relief structure of the pressure relief valve according to claim 5, characterized in that: the support edge (10) at the lower end of the valve rod (2) is abutted against the end face of the pressure relief cavity (5) connected with the air inlet hole (8), and the part of the bottom of the valve rod (2) with the air-passing cutting surface (11) is positioned in the air inlet hole (8); the reset spring (4) is propped between the end face of the pressure relief cavity and the supporting edge (10) of the valve rod (2).

7. The pressure relief structure of the pressure relief valve according to claim 6, characterized in that: the lower end of the supporting edge (10) of the valve rod (2) is sleeved with a sealing ring (12).

Background

The pressure relief valve is a valve for pressure relief of the pressure container, however, the pressure relief effect of the conventional pressure relief valve is unstable, so that the overall performance of the pressure container is affected.

Disclosure of Invention

Aiming at the defects in the prior art, the invention aims to provide the pressure relief structure of the pressure relief valve, which is simple in structure and good in pressure relief effect.

In order to achieve the purpose, the invention provides the following technical scheme: the utility model provides a pressure release structure of relief valve, includes valve body, valve rod, valve cap and reset spring, valve body and valve cap threaded connection are formed with the pressure release chamber of shoulder hole form between valve body and valve cap, the valve rod setting in the pressure release intracavity, reset spring overlaps on the valve rod and offsets with pressure release chamber terminal surface, the valve rod upper end extend the valve cap and with valve cap sliding connection, the tip that extends the valve cap at the valve rod is provided with the plectrum to be provided with the draw-in groove that can block the plectrum at the up end of valve cap, the draw-in groove sets up on the position that extends the valve cap near the valve rod, the plectrum supports on the terminal surface edge of valve cap and in not the immigration draw-in groove when not releasing the pressure.

Through adopting foretell technical scheme, when the relief valve pressure release, the tip of valve rod can further stretch out the valve cap to make the plectrum move down and slide in the draw-in groove and block in the draw-in groove, thereby played the effect of auto-lock at the pressure release in-process, and then ensured the stability and the effect of pressure release.

The invention is further configured to: the plectrum swivelling joint in the upper end of valve rod, the draw-in groove block the plectrum and restrict the plectrum upwards rotatory.

Through adopting foretell technical scheme, plectrum swivelling joint is in the upper end of valve rod to can ensure the smooth and easy of operation when the plectrum moves, the draw-in groove blocks the plectrum and restricts the plectrum and upwards rotate, thereby can play good limiting displacement to the plectrum, ensures pressure release structure's auto-lock effect.

The invention is further configured to: the clamping groove includes, but is not limited to, an annular groove and a fan-shaped groove.

By adopting the technical scheme, the clamping groove comprises but is not limited to an annular groove and a fan-shaped groove, so that the groove-shaped structure capable of clamping the poking piece can be suitable for the pressure relief structure of the pressure relief valve.

The invention is further configured to: the bottom of the valve body is provided with an air inlet communicated with the pressure relief cavity, and the side wall of the valve cap is provided with a plurality of air exhaust holes which are uniformly distributed and communicated with the pressure relief cavity.

By adopting the technical scheme, high-pressure gas enters through the gas inlet and is discharged from the gas outlet after passing through the pressure relief cavity.

The invention is further configured to: the lower end of the valve rod is provided with a supporting edge, and the bottom end face of the valve rod is provided with a plurality of air passing cutting faces which are uniformly distributed according to the circumference and extend to the supporting edge.

The invention is further configured to: the support edge at the lower end of the valve rod is abutted against the end face of the pressure relief cavity connected with the air inlet, and the part of the bottom of the valve rod, which is provided with the air cutting surface, is positioned in the air inlet; the reset spring is propped between the end face of the pressure relief cavity and the supporting edge of the valve rod.

Through adopting foretell technical scheme, can get into the inlet port from the air passing cutting face department of valve rod when high-pressure gas reaches inlet port department, support earlier again along exerting pressure for the whole upward movement of valve rod, the piece can be dialled to the draw-in groove direction rotation under the action of gravity to the valve rod when the upward movement of valve rod, finally the card is on the draw-in groove, thereby has realized the effect of auto-lock.

The invention is further configured to: and a sealing ring is sleeved at the lower end of the support edge of the valve rod.

Through adopting foretell technical scheme, the support along the lower pot head at the valve rod is equipped with the sealing washer to can ensure the leakproofness of valve rod and inlet port diameter.

The both sides on the upper portion of plectrum are formed with the lug, and the plectrum passes through lug swivelling joint on the valve rod to be provided with a connecting hole in the upper end of plectrum, through set up a pole or other structures in the connecting hole, utilize the principle perk plectrum of lever after the pressure release is accomplished, thereby make the valve rod reset.

Drawings

FIG. 1 is a schematic structural view of the present invention;

FIG. 2 is a bottom view of the present invention;

FIG. 3 is a schematic cross-sectional view of the present invention;

reference numbers in the drawings and corresponding part names: 1-valve body, 2-valve rod, 3-valve cap, 4-reset spring, 5-pressure relief cavity, 6-plectrum, 7-clamping groove, 8-air inlet hole, 9-air outlet hole, 10-supporting edge, 11-air passing cutting surface and 12-sealing ring.

Detailed Description

An embodiment of the present invention is further explained with reference to fig. 1 to 3.

The utility model provides a pressure relief structure of relief valve, includes valve body 1, valve rod 2, valve cap 3 and reset spring 4, valve body 1 and 3 threaded connection of valve cap, is formed with the pressure release chamber 5 of shoulder hole form between valve body 1 and valve cap 3, valve rod 2 set up in pressure release chamber 5, reset spring 4 cover offsets on valve rod 2 and with the 5 terminal surfaces in pressure release chamber, 2 upper ends of valve rod extend valve cap 3 and with 3 sliding connection of valve cap, the tip that extends valve cap 3 at valve rod 2 is provided with plectrum 6 to be provided with the draw-in groove 7 that can block plectrum 6 at the up end of valve rod 3, draw-in groove 7 sets up on being close to valve rod 2 and extending valve cap 3's position, the relief valve plectrum 6 supports on the terminal surface edge of valve cap 3 and in not immigration draw-in groove 7 when not releasing the pressure.

When the pressure relief valve releases pressure, the end part of the valve rod 2 can further extend out of the valve cap 3, so that the shifting piece 6 moves downwards to slide into the clamping groove 7 and is clamped in the clamping groove 7, the self-locking effect is achieved in the pressure relief process, and the stability and the effect of pressure relief are further ensured.

Further: plectrum 6 swivelling joint in the upper end of valve rod 2, draw-in groove 7 block plectrum 6 and restrict plectrum 6 and upwards rotate.

Through plectrum 6 swivelling joint in the upper end of valve rod 2 to can ensure the smooth and easy of operation when plectrum 6 moves, draw-in groove 7 blocks plectrum 6 and restricts plectrum 6 upwards rotatory, thereby can play good limiting displacement to plectrum 6, ensures pressure relief structure's auto-lock effect.

Further: the clamping groove 7 includes, but is not limited to, an annular groove and a fan-shaped groove.

The groove-shaped structure which can clamp the poking piece 6 can be suitable for the pressure relief structure of the pressure relief valve by the clamping groove 7 including but not limited to an annular groove and a fan-shaped groove.

Further: an air inlet hole 8 communicated with the pressure relief cavity 5 is formed in the bottom of the valve body 1, and a plurality of exhaust holes 9 which are uniformly distributed and communicated with the pressure relief cavity 5 are formed in the side wall of the valve cap 3.

The high-pressure gas enters through the air inlet hole 8 and is discharged from the air outlet hole 9 after passing through the pressure relief cavity 5.

Further: the lower end of the valve rod 2 is provided with a supporting edge 10, and the bottom end face of the valve rod 2 is provided with a plurality of air passing cutting faces 11 which are uniformly distributed according to the circumference and extend to the supporting edge 10.

Further: the support edge 10 at the lower end of the valve rod 2 is abutted against the end face of the pressure relief cavity 5 connected with the air inlet hole 8, and the part of the bottom of the valve rod 2 with the air cutting surface 11 is positioned in the air inlet hole 8; the return spring 4 is supported between the end surface of the pressure relief cavity 5 and the support edge 10 of the valve rod 2.

When high-pressure gas reaches inlet port 8, the gas passing cutting surface 11 of valve rod 2 can be followed and inlet port 8 is entered, and then the pressure is exerted along 10 through supporting earlier for the whole upward movement of valve rod 2, plectrum 6 can be rotatory to draw-in groove 7 direction under the action of gravity when valve rod 2 upward movement, finally the card is on draw-in groove 7, thereby the effect of auto-lock has been realized.

Further: a sealing ring 12 is sleeved at the lower end of the supporting edge 10 of the valve rod 2.

The sealing ring 12 is sleeved at the lower end of the supporting edge 10 of the valve rod 2, so that the sealing performance of the diameter of the valve rod 2 and the diameter of the air inlet hole 8 can be ensured.

The both sides on the upper portion of plectrum 6 are formed with the lug, and plectrum 6 passes through lug swivelling joint on valve rod 2 to be provided with a connecting hole in the upper end of plectrum 6, through set up a pole or other structures in the connecting hole, utilize the principle perk plectrum 6 of lever after the pressure release is accomplished, thereby make valve rod 2 reset.

The above embodiments are only preferred embodiments of the present invention, and the protection scope of the present invention is not limited thereby, so: all equivalent changes made according to the structure, shape and principle of the invention are covered by the protection scope of the invention.