CN111336294A - An explosion-proof safety valve with KF flange interface - Google Patents

Abstract

The invention discloses an explosion-proof safety valve of a KF flange interface, which comprises a valve body (1) and a valve core (6), wherein standard KF flanges are arranged at two ends of the valve body (1), a central hole (14) for installing the valve core (6) is arranged in the middle of the valve body (1), a solid cylinder (62) of the valve core (6) is sleeved with a compression spring (4) after being inserted into the central hole (14), an adjusting screw rod (61) for installing an adjusting nut (2) is arranged at the top end of the solid cylinder (62), the outer diameter of the adjusting nut (2) is larger than the outer diameter of the compression spring (4), and the inner diameter of the adjusting nut (2) is smaller than the inner diameter of the compression spring (4); the mutual matching of the adjusting screw rod (61) and the adjusting nut (2) is adopted to adjust the compression amount of the compression spring (4) so as to adjust the opening pressure of the explosion-proof safety valve (8). The explosion-proof safety valve can be quickly assembled and disassembled, has small volume, and can realize the unloading of flammable and explosive gas in the cavity without leakage and explosion.

Description

An explosion-proof safety valve with KF flange interface

technical field

The invention relates to the technical field of safety protection valves, in particular to an explosion-proof safety valve with a KF flange interface.

Background technique

Explosion-proof safety valve is an overpressure safety protection device on pressure equipment used for flammable and explosive media or environments. It is in a normally closed state on the equipment and automatically opens when the pressure of the medium in the container equipment rises above the set value. , by draining the medium to the outside of the system to prevent the medium pressure in the container equipment from exceeding the set value, and automatically shut down when the medium pressure in the container equipment drops to the set value, preventing the medium in the container from continuing to lose the damage caused by the operation of the equipment itself. At present, the existing explosion-proof safety valves on the market are relatively simple in form. The valve body is mostly threaded or welded to the equipment cavity. It is affected by external uncertain environmental factors for a long time or needs to be replaced due to damage caused by human factors, or the design requirements need to be replaced frequently. The explosion-proof safety valve that is disassembled and fixed by thread or welding has the hidden danger of being difficult to replace.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide an explosion-proof safety valve with a KF flange interface in view of the problems existing in the prior art; the valve body of the explosion-proof safety valve has a KF flange, which can realize quick disassembly and replacement, and is mainly used for easy installation and replacement. Flammable and explosive media container equipment.

The purpose of this invention is to solve by the following technical solutions:

An explosion-proof safety valve with a KF flange interface, comprising a valve body and a valve core, characterized in that: the two ends of the valve body are provided with standard KF flanges, and a central hole for installing the valve core is arranged in the middle of the valve body , the solid cylinder of the valve core is inserted into the central hole and then sleeved with a compression spring, the top of the solid cylinder is provided with an adjustment screw for installing an adjustment nut, the outer diameter of the adjustment nut is larger than the outer diameter of the compression spring and the inner diameter of the adjustment nut is smaller than The inner diameter of the compression spring; by adjusting the cooperation of the screw rod and the adjusting nut, the compression amount of the compression spring can be adjusted to adjust the opening pressure of the explosion-proof safety valve.

The adjusting screw rod is sleeved with a washer that defines the compression spring, and the washer is located between the adjusting nut and the compression spring.

The central hole is an elongated deep hole, and a circle of ventilation holes is arranged on the peripheral side of the central hole to facilitate the passage of fluid.

One end of the valve body is provided with a boss on the outer surface of the KF flange, and the peripheral side of the boss is a stepped sealing surface for installing the sealing ring.

The central hole is located in the inner cavity of the KF flange on the side of the boss.

The valve core is a "T"-shaped structure, one end of the valve core is an adjusting screw rod, the middle is a cylindrical rod composed of a solid cylinder, and the other end of the valve core is a flat cylindrical valve seat. The outer side is flat, and the inner side is a conical sealing surface concave inward.

An O-shaped rubber sealing ring for sealing is provided between the outer end surface of the valve body on the insertion side of the valve core and the valve core.

The sealing ring is arranged between the stepped sealing surface of the valve body and the conical sealing surface of the valve core.

The step sealing surface and the conical sealing surface form a sealing form with sealing rings on three sides.

Compared with the prior art, the present invention has the following advantages:

The T-shaped valve core of the explosion-proof safety valve of the present invention passes through the center hole of the valve body and then installs a compression spring, one end of the compression spring abuts on the end face of the center hole of the valve body, and the other end abuts on the gasket, and the gasket is installed on the adjusting wire The rod is fixed with an adjusting nut, and the slender center hole on the valve body can ensure that the solid cylindrical section on the valve core passing through this hole only moves axially, effectively preventing the valve core from skewing and jamming when relative movement occurs. phenomenon; the explosion-proof safety valve can be quickly disassembled, small in size, one end is matched with the external pipeline, and the other end is matched with the container equipment, which can realize the unloading of the flammable and explosive gas inside the cavity without leakage and explosion.

Description of drawings

Accompanying drawing 1 is the structural sectional view of the explosion-proof safety valve of the KF flange interface of the present invention;

2 is a structural cross-sectional view of the valve body of the present invention;

Fig. 3 is the three-dimensional structure schematic diagram of the valve body of the present invention;

Accompanying drawing 4 is the three-dimensional structure schematic diagram of the valve core of the present invention;

5 is a schematic diagram of the actual use and installation of the explosion-proof safety valve of the KF flange interface of the present invention.

Among them: 1—valve body; 11—step sealing surface; 12—boss; 13—vent hole; 14—center hole; 2—adjusting nut; 3—gasket; 4—compression spring; 5—sealing ring; 6— Valve core; 61—adjusting screw; 62—solid cylinder; 63—conical sealing surface; 64—valve seat; 7—pressure vessel; 71—KF welding flange; 72—standard clamp; 8—explosion-proof safety valve ; 9—metal hose.

Detailed ways

According to the drawings of the embodiments of the present invention, the technical solutions in the embodiments of the present invention are clearly and completely described. Obviously, the described embodiments are only a part of the embodiments of the present invention, but not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present invention.

The explosion-proof safety valve of the invention can be used on some pipelines or containers of inflammable and explosive fluids, and the explosion-proof safety valve body is provided with two quick-connect flanges, which can realize the rapid disassembly function of the explosion-proof safety valve.

Example

As shown in Figure 1-4: An explosion-proof safety valve with KF flange interface, including valve body 1, adjusting nut 2, gasket 3, compression spring 4, sealing ring 5, valve core 6, two parts of the valve body 1 There is a standard KF flange at the end, and a vent hole 13 and a stepped sealing surface 11 are provided inside for the passage of fluid. The middle of the valve body 1 is provided with a slender center hole 14 for installing the valve core 6, and one end has a solid core. The valve core 6 of the cylindrical structure passes through the central hole 14, and the other end of the valve core 6 is the adjusting screw 61 on which the adjusting nut 2 is installed. There is a gasket 3 sleeved on the adjusting screw 62 , and an O-shaped rubber sealing ring 5 is located between the stepped sealing surface 11 on the valve body 1 and the conical sealing surface 63 of the valve core 6 . The valve core 6 cooperates with the adjusting nut 2 to adjust the compression amount of the compression spring 4 to adjust the opening pressure of the explosion-proof safety valve, and the adjusting nut 2 is used to adjust the opening pressure of the valve.

Regarding the specific structure of the valve body 1 and the valve core 6, the valve body 1 of the explosion-proof safety valve is a hollow cavity with different KF flanges at both ends and a through-through inside. The hollow cavity is composed of a circle of ventilation holes 13 and a central hole. 14, the central hole 14 is an elongated and deep hole, and one end of the KF flange is provided with a boss 12 on the outer surface, and the boss is a step sealing surface 11 for installing the sealing ring 5. The valve core 6 of the explosion-proof safety valve is a "T"-shaped structure composed of a cylindrical rod and a flat cylindrical valve seat 64. One end of the valve core 6 is an adjusting screw 61, the middle is a solid cylinder 62, and the other end is a flat Cylindrical valve seat 64, the outer side of the valve seat 64 is a plane, and the inner side is a conical sealing surface 63 concave inward. There is a sealing ring 5 between the stepped sealing surface 11 of the valve body 1 and the conical sealing surface 63 of the valve core 6 .

When the explosion-proof safety valve of this embodiment is used, one end of the explosion-proof safety valve 8 uses a standard clamp 72 to install the explosion-proof safety valve 8 of the present invention on the KF welding flange 71 of the pressure vessel 7, and the other end uses a standard clamp 72. Connect the metal hose 9 or directly to the exhaust gas storage device. When the pressure in the pressurized container 7 rises beyond the set value of the explosion-proof safety valve 8 , the explosion-proof safety valve 8 will automatically open, and the gas inside the pressurized container 7 will be discharged through the standard clamp 72 at the rear end of the explosion-proof safety valve 8 The metal hose 9 connected to the waste gas storage container can realize that the fluid inside the pressurized container 7 is not fused with the external environmental medium, so as to avoid environmental pollution; at the same time, when the fluid inside the pressurized container 7 is inflammable and explosive It can effectively isolate the air and effectively avoid explosion accidents. When the pressure in the cavity of the explosion-proof safety valve 8 rises, the valve automatically opens, and the pressure in the cavity decreases rapidly after opening. When the pressure drops below the set opening pressure of the valve, the valve will automatically close, which realizes the protection of the medium inside the pressurized container 7. The automatic control of pressure achieves the safety protection effect on the container equipment.

The above embodiments are only to illustrate the technical idea of the present invention, and cannot limit the protection scope of the present invention. Any modification made on the basis of the technical solution according to the technical idea proposed by the present invention falls within the protection scope of the present invention. The technology not involved in the present invention can be realized by the existing technology.

Claims (9)

1. The utility model provides an explosion-proof safety valve of KF flange interface, includes valve body (1) and case (6), its characterized in that: the two ends of the valve body (1) are provided with standard KF flanges, the middle part of the valve body (1) is provided with a center hole (14) for installing a valve core (6), a solid cylinder (62) of the valve core (6) is inserted into the center hole (14) and then sleeved with a compression spring (4), the top end of the solid cylinder (62) is provided with an adjusting screw rod (61) for installing an adjusting nut (2), the outer diameter of the adjusting nut (2) is larger than the outer diameter of the compression spring (4), and the inner diameter of the adjusting nut (2) is smaller than the inner diameter of the compression spring (4); the mutual matching of the adjusting screw rod (61) and the adjusting nut (2) is adopted to adjust the compression amount of the compression spring (4) so as to adjust the opening pressure of the explosion-proof safety valve (8).

2. The explosion-proof safety valve of the KF flange interface of claim 1, wherein: the adjusting screw rod (61) is sleeved with a gasket (3) for limiting the compression spring (4), and the gasket (3) is positioned between the adjusting nut (2) and the compression spring (4).

3. The explosion-proof safety valve of the KF flange interface of claim 1, wherein: the central hole (14) is a section of long and thin deep hole, and a circle of vent holes (13) which are convenient for fluid to pass through are arranged on the peripheral side of the central hole (14).

4. The KF flange interface explosion relief valve of claim 1 or 3, wherein: a boss (12) is arranged on the outer surface of a KF flange at one end of the valve body (1), and a step sealing surface (11) for mounting the sealing ring (5) is arranged on the peripheral side of the boss (12).

5. The explosion-proof safety valve of the KF flange interface of claim 4, wherein: the central hole (14) is positioned in the KF flange inner cavity at the side of the boss (12).

6. The explosion-proof safety valve of the KF flange interface of claim 1, wherein: the valve core (6) is of a T-shaped structure, one end of the valve core (6) is a cylindrical rod consisting of an adjusting screw rod (61) and a section of solid cylinder (62) in the middle, the other end of the valve core (6) is a flat cylindrical valve seat (64), the outer side of the valve seat (64) is a plane, and the inner side of the valve seat is an inwards-recessed conical sealing surface (63).

7. The explosion-proof safety valve of the KF flange interface of claim 1, wherein: an O-shaped rubber sealing ring (5) for sealing is arranged between the outer end face of the valve body (1) on the insertion side of the valve core (6) and the valve core (6).

8. The explosion-proof safety valve of the KF flange interface of claim 7, wherein: the sealing ring (5) is arranged between the step sealing surface (11) of the valve body (1) and the conical sealing surface (63) of the valve core (6).

9. The explosion-proof safety valve of the KF flange interface of claim 8, wherein: the step sealing surface (11) and the conical sealing surface (63) form a sealing form with three surfaces and a sealing ring (5).

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