Passive automatic reset pressure release valve

Abstract

The utility model discloses a passive automatic reset pressure release valve which can automatically adjust the pressure in a room. A valve body of the pressure release valve is formed by splicing and welding bent pieces and is provided with a valve seat and a coil spring support. The shaft horizontally penetrates through the valve body, a valve plate is fixed on the shaft, a hinge and a support lug are arranged on the valve plate, a connecting rod is fixed on the support lug, and the valve plate is linked through the connecting rod. And one end of the coil spring is fixed on the bracket, and the other end is connected with the hinge to realize automatic opening and resetting of the valve plate. A rectangular sealing strip is embedded in the valve seat, so that the sealing performance after pressure relief is ensured. The pressure release valve can automatically release pressure during overpressure and automatically reset after pressure release, external power is not needed, the maintenance cost is low, and the pressure release valve is suitable for the frequent pressure release environment.

Description

TECHNICAL FIELD

[0001] The utility model belongs to pressure relief valve technical field relates to a kind of non-active automatic reset pressure relief valve. BACKGROUND

[0002] Some rooms in nuclear power plant need to maintain certain pressure, need to be relieved when pressure difference exceeds the limit, need to keep closed when pressure difference is below the specified value, and keep sealed state, open and close frequently. Conventional safety pressure relief valve for nuclear power is mostly destructive relief, i.e. one-time use of safety pin, etc. After relief or use for a period of time, it must be manually replaced or manually reset, with high maintenance cost, and cannot be used in frequently relieved working conditions.

[0003] The utility model discloses a high pure high pressure gas pressure relief valve, through the setting of barrier block subassembly structure, it can automatically lift a certain height when not relieving, so that the condensate water in the valve body can be discharged in time, to avoid causing equipment damage or pollution blockage, and when high pure high pressure gas is relieved, the airflow can be pressed down by pressure in the process of passing through guide block, and then the locking of barrier block subassembly structure is completed by cooperating with push block subassembly structure, so as to avoid that some special nature gas is discharged in large quantities from the groove hole of drainage, and after relief is completed, the user can manually contact locking to discharge the condensate water in the valve body. But the design of this pressure relief valve needs external power (such as air pressure) to maintain the sealing state of the barrier block, when the air pressure is insufficient, it may cause gas leakage, and external power and manual reset are needed. SUMMARY

[0004] In order to achieve the above purpose, the utility model provides a kind of non-active automatic reset pressure relief valve, solve the problem that safety pressure relief valve cannot be reused and cannot be automatically reset in prior art.

[0005] To solve the above technical problems, the utility model adopts the technical scheme of a kind of non-active automatic reset pressure relief valve, including valve body, and the side frame of valve body is provided with valve seat, and upper and lower frame are symmetrically fixed with coil spring support.

[0006] Further, the shaft passes through the valve body horizontally and is fixed on the valve body by the first fastener, and the shaft sleeve is sleeved on both ends of the shaft, and the end cover is arranged on the shaft sleeve.

[0007] Further, the valve plate is arranged on the shaft and fixed on the shaft by the second fastener.

[0008] Further, the hinge is arranged on the valve plate and fixed on the valve plate by the third fastener, and when there are multiple shafts, there are also multiple valve plates, and the lug is arranged on the valve plate and fixed on the valve plate by the fifth fastener.

[0009] Further, the lug is provided with a plurality of times, the lug is connected through a connecting rod, and the connecting rod is fixed on the lug through a pin shaft assembly.

[0010] Further, the coil spring support is provided with two, symmetrically welded on the upper and lower frames of the valve body, a plurality of holes are arranged on the coil spring support, the position of the hole is lower than the position of the shaft, and one end of the coil spring is fixed on the hole of the coil spring support through the sixth fastener, and the other end of the coil spring is fixed on the hinge through the fourth fastener.

[0011] Further, the valve body is made of a bent piece.

[0012] Further, a rectangular sealing strip is arranged in the valve seat, and the sealing surface of the rectangular sealing strip is provided with a protrusion.

[0013] The beneficial effects of the utility model are:

[0014] 1. Without additional power supply, gas source and hydraulic power, the pressure difference is used as power to open the pressure relief valve, release the excess pressure, and make the pressure in the pipeline or room not exceed the safety value.

[0015] 2. When the pressure value in the room reaches the set safety value, the pressure relief valve opens, and after pressure relief, the pressure relief valve can automatically reset and meet the sealing I level requirement.

[0016] 3. The pressure relief valve can be repeatedly opened and closed, and the function remains stable. DRAWINGS

[0017] In order to more clearly illustrate the technical scheme in the embodiments of the utility model or the prior art, the following will briefly introduce the drawings needed to be used in the embodiment or the prior art description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 It is the front view of the non-active automatic reset pressure relief valve of the utility model embodiment.

[0019] Figure 2 It is the A-A sectional view (closed state) of the non-active automatic reset pressure relief valve of the utility model embodiment.

[0020] Figure 3 It is the A-A sectional view (open state) of the non-active automatic reset pressure relief valve of the utility model embodiment.

[0021] Figure 4It is a top view of the non-active automatic reset pressure relief valve of the embodiment of the utility model.

[0022] Figure 5 It is a detail view when the non-active automatic reset pressure relief valve of the embodiment of the utility model is pressure relieved.

[0023] In the figure, 1. valve body, 2. valve plate, 3. shaft, 4. shaft sleeve, 5. end cover, 6. first fastener, 7. rectangular sealing strip, 8. second fastener, 9. hinge, 10. third fastener, 11. fourth fastener, 12. lug, 13. connecting rod, 14. pin shaft assembly, 15. fifth fastener, 16. valve seat, 17. sixth fastener, 18. coil spring, 19. coil spring bracket. DETAILED DESCRIPTION

[0024] The technical scheme in the embodiments of the utility model will be described clearly and completely below in conjunction with the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the utility model.

[0025] As Figures 1-5 shown, the utility model embodiment provides a kind of non-active automatic reset pressure relief valve, including valve body 1,

[0026] The valve body 1 is made of bending piece stitch welding, and the valve seat 16 is welded on the side frame of valve body 1, and two coil spring brackets 19 are symmetrically welded on upper and lower frames,

[0027] Shaft 3 passes through valve body 1 horizontally, and shaft 3 is fixed on valve body 1 by first fastener 6, and shaft sleeve 4 is sleeved on both ends of shaft 3, and end cover 5 is arranged on shaft sleeve 4, and the shaft sleeve 4 has lubricating function, which can reduce the resistance when shaft 3 rotates.

[0028] Valve plate 2 is arranged on shaft 3, and valve plate 2 is fixed on shaft 3 by second fastener 8, and valve plate 2 can rotate by shaft 3.

[0029] Hinge 9 is arranged on valve plate 2, and hinge 9 is fixed on valve plate 2 by third fastener 10, when there are multiple shafts 3, there are also multiple valve plates 2, lug 12 is arranged on valve plate 2, and lug 12 is fixed on valve plate 2 by fifth fastener 15.

[0030] When multiple lugs 12 are arranged, lugs 12 are connected by connecting rod 13, and connecting rod 13 is fixed on lug 12 by pin shaft assembly 14, so that valve plate 2 is linked, and opening angle is consistent.

[0031] The coil spring support 19 is provided with a plurality of holes, the position of the holes is lower than the position of the shaft 3, the coil spring 18 can be adjusted on the coil spring support 19 according to the situation, and one end of the coil spring 18 is fixed on the hole of the coil spring support 19 through the sixth fastener 17, the coil spring 18 is connected with the hinge 9, and the other end of the coil spring 18 is fixed on the hinge 9 through the fourth fastener 11.

[0032] The valve seat 16 is provided with a rectangular sealing strip 7, the sealing surface of the rectangular sealing strip 7 is provided with a protrusion, the protrusion on the rectangular sealing strip 7 is pressed when the valve plate 2 is closed, and sealing effect is achieved. The valve seat 16 is at an angle with the vertical center line of the valve body 1, which can make the valve plate 2 closely fit with the rectangular sealing strip 7 when closed.

[0033] The coil spring 18 symmetrically arranged on both sides of the valve plate 2 can ensure that the force is uniform when the valve plate 2 is opened and closed.

[0034] When the valve plate 2 is opened, the coil spring 18 is stretched and stores energy, when the pressure on the valve plate 2 decreases, the coil spring 18 pulls the valve plate 2, so that the valve plate 2 slowly closes, and a sealed state is achieved.

[0035] The passive automatic reset pressure relief valve designed in the embodiment is in a closed state under normal circumstances, but when the pressure in the room reaches the preset safety pressure value, the pressure relief mechanism is automatically started, which can effectively prevent safety accidents caused by excessive pressure. And the pressure relief valve does not need to be provided with additional power, gas source and other power.

[0036] When the air pressure in the room rises to the set pressure threshold, the gas will generate pressure on the valve plate 2, push the valve plate 2 to rotate and pull the coil spring 18, release energy, and achieve the purpose of pressure relief. At the same time, the coil spring 18 stores energy when being pulled, which prepares for the reset action after pressure relief.

[0037] When the pressure relief is completed, the energy stored in the coil spring 18 begins to act, the pulling force provided by the energy makes the valve plate 2 return to the initial closed state, this reset action is not only fast and accurate, but also can ensure that the pressure relief valve can be closed in time, effectively preventing the gas from continuing to leak. When the valve plate 2 returns to the closed position, it will press the rectangular sealing strip 7 in contact with the pressure relief valve, realize the sealing effect, and can meet the sealing level I requirement, ensure that the air pressure in the room will not leak again after the pressure relief valve is closed. The pressure relief valve can be repeatedly opened and closed many times, and its function always remains stable and unchanged.

[0038] Each embodiment in the specification is described in a related manner, the same and similar parts between each embodiment can be referred to each other, and each embodiment mainly explains the difference from other embodiments.

[0039] The above merely describes preferred embodiments of the present application, and is not intended to limit the scope of protection of the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present application shall be included in the scope of protection of the present application.

Claims

1. A passive, self-resetting pressure relief valve, characterized in that, Including the valve body (1), the side frame of valve body (1) is provided with valve seat (16), the upper and lower frame of valve body (1) is provided with the symmetrical fixed coil spring support (19); The coil spring support (19) is provided with two, the coil spring support (19) is provided with a plurality of holes, the position of hole is lower than the position of shaft (3), and one end of coil spring (18) is fixed on the hole of coil spring support (19) through the sixth fastener (17).

2. The non-powered self-resetting pressure relief valve of claim 1, wherein The shaft (3) passes through the valve body (1) horizontally, and the shaft (3) is fixed on the valve body (1) through the first fastener (6), the both ends of shaft (3) are sleeved with shaft sleeve (4), and the end cover (5) is arranged on the shaft sleeve (4).

3. A non-powered self-resetting pressure relief valve according to claim 2, wherein The valve plate (2) is arranged on the shaft (3), and the valve plate (2) is fixed on the shaft (3) through the second fastener (8).

4. The non-powered self-resetting pressure relief valve of claim 3, wherein The hinge (9) is arranged on the valve plate (2), and the hinge (9) is fixed on the valve plate (2) through the third fastener (10), when the shaft (3) has multiple, the valve plate (2) also has multiple, the lug (12) is arranged on the valve plate (2), and the lug (12) is fixed on the valve plate (2) through the fifth fastener (15).

5. A non-powered self-resetting pressure relief valve according to claim 4, wherein When the lug (12) is provided with multiple, the lug (12) is connected through connecting rod (13), and the connecting rod (13) is fixed on the lug (12) through pin shaft assembly (14).

6. The non-powered self-reseating pressure relief valve of claim 1, wherein The other end of coil spring (18) is connected with hinge (9), and the other end of coil spring (18) is fixed on hinge (9) through fourth fastener (11).

7. The non-powered self-reseating pressure relief valve of claim 1, wherein The rectangular sealing strip (7) is arranged in the valve seat (16), and the sealing surface of rectangular sealing strip (7) is provided with a convex.

8. The non-powered self-reseating pressure relief valve of claim 1, wherein The valve body (1) is made of bending piece tailor-welding.

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