CN222316055U - Safety valve capable of avoiding excessive pressure relief - Google Patents

Abstract

The utility model relates to the technical field of safety valves, in particular to a safety valve capable of avoiding excessive pressure relief, which comprises a safety valve body, wherein a plurality of steam outlets are formed in the side part of the safety valve body at intervals, a valve core for blocking the steam outlets is connected in a sliding manner in the safety valve body, a spring is fixedly connected between the safety valve body and the valve core, a blocking seat is fixedly arranged below the valve core in the safety valve body, a steam through hole is formed in the surface of the blocking seat, a valve rod is fixedly connected to the upper end of the valve core, the valve rod penetrates through the top of the safety valve body in a sliding manner, a positive magnetic ring is fixedly arranged on the upper end face of the safety valve body in an embedding manner, and a cover plate is fixedly connected to the upper end of the valve rod.

Description

Safety valve capable of avoiding excessive pressure relief

Technical Field

The utility model relates to the technical field of safety valves, in particular to a safety valve capable of avoiding excessive pressure relief.

Background

The safety valve is also called a pressure relief valve, is a valve which is kept in a closed state by utilizing a spring and is automatically opened when the pressure exceeds a given value, belongs to the class of automatic valves, plays a role in protecting equipment, controls the pressure to be in a safe pressure range, plays an important role in protecting personnel safety and equipment operation, is mainly widely applied to a steam boiler, a pressure pipeline, a pressure container and the like, and is used in the prior safety valve.

Disclosure of utility model

The present utility model is directed to a relief valve capable of avoiding excessive pressure relief, so as to solve the above-mentioned problems in the prior art.

In order to achieve the above purpose, the present utility model provides the following technical solutions:

The utility model provides a can avoid relief pressure excessively relief safety valve, includes the safety valve body, the lateral part of safety valve body is spaced apart to be equipped with a plurality of steam vents, the inside sliding connection of safety valve body has the case that is used for shutoff steam vent, fixedly connected with spring between safety valve body and the case, the inside of safety valve body is located the below of case and fixedly provided with keeps off the seat, the logical steam vent has been seted up on the surface that keeps off the seat, the upper end fixedly connected with valve rod of case, the valve rod slides and runs through in the top of safety valve body, the up end of safety valve body inlays fixed mounting and has positive magnetic ring, the upper end fixedly connected with apron of valve rod, the bottom end of apron inlays fixed mounting with positive magnetic ring corresponding position department and has negative magnetic ring.

Preferably, the number of the steam outlets is four, and the steam outlets are distributed on the side part of the safety valve body at equal intervals in a circular shape.

Preferably, the outside fixedly connected with of relief valve body is linked together with the play steam pocket, the outer tip fixed mounting of play steam pocket has the protection screen panel.

Preferably, the cross section of the steam outlet nozzle is conical, and the caliber of the outer end of the steam outlet nozzle is larger than that of the inner end of the steam outlet nozzle.

Preferably, the upper end of the baffle seat is fixedly provided with a sealing ring, the bottom end surface of the valve core is provided with a groove, and the sealing ring is matched with the groove.

Preferably, the bottom end of the safety valve body is fixedly provided with a valve seat, and an installation screw cavity communicated with the inside of the safety valve body is formed in the valve seat.

Compared with the prior art, the utility model has the beneficial effects that:

1. According to the utility model, the valve core is driven to open upwards along the safety valve body by utilizing steam pressure higher than a given value, the spring is contracted, the cover plate and the valve rod are synchronously lifted, at the moment, the valve core cancels the sealing of each steam outlet, steam can be discharged through the steam inlet, the steam outlet and the steam outlet for decompression, adsorption acting force can be generated between the positive magnetic ring and the negative magnetic ring, if the steam pressure is suddenly reduced below the given value, the valve core is driven to reset and close along the safety valve body by utilizing the spring and the adsorption acting force, the cover plate and the valve rod are synchronously lifted down, at the moment, the negative magnetic ring is close to the positive magnetic ring, the adsorption acting force is gradually increased, the valve core can be promoted to rapidly perform sealing of each steam outlet, the time required for completing the reset and closing of the valve core is facilitated to be shortened, the situation of excessive decompression is avoided, and the use effect of the safety valve is ensured.

2. According to the utility model, the sealing ring and the groove are arranged, and the sealing ring is matched with the groove, so that the sealing ring can be embedded in the groove in a matched manner, the sealing effect between the valve core and the baffle seat is ensured, and the overall sealing performance of the safety valve is further improved.

Drawings

FIG. 1 is a schematic cross-sectional view of a relief valve of the present utility model after a valve element is reset to a closed position;

FIG. 2 is an enlarged schematic view of the portion A in FIG. 1;

FIG. 3 is a schematic perspective view of a relief valve with a valve element capable of avoiding excessive pressure relief after a reset and closing operation;

Fig. 4 is a schematic cross-sectional view of a relief valve of the present utility model after an upward movement and opening operation of a valve element.

The valve comprises a safety valve body 1, a steam outlet 101, a blocking seat 103, a steam inlet 104, a sealing ring 2, a valve core 201, a valve rod 202, a cover plate 203, a groove 3, a spring 4, a positive magnetic ring 5, a negative magnetic ring 6, a steam outlet 601, a protective net cover 7, a valve seat 701 and an installation screw cavity.

Detailed Description

The following description of the embodiments of the present utility model will be made clearly and completely with reference to the accompanying drawings, in which it is apparent that the embodiments described are only some embodiments of the present utility model, but not all embodiments. All other embodiments, which can be made by those skilled in the art based on the embodiments of the utility model without making any inventive effort, are intended to be within the scope of the utility model.

Referring to fig. 1-4, the present utility model provides a technical solution:

The safety valve capable of avoiding excessive pressure relief comprises a safety valve body 1, wherein a plurality of steam outlets 101 are arranged at intervals on the side part of the safety valve body 1, a valve core 2 for blocking the steam outlets 101 is connected in the safety valve body 1 in a sliding manner, a spring 3 is fixedly connected between the safety valve body 1 and the valve core 2, a blocking seat 102 is fixedly arranged below the valve core 2 in the safety valve body 1, a steam through hole 103 is formed in the surface of the blocking seat 102, a valve rod 201 is fixedly connected to the upper end of the valve core 2, the valve rod 201 penetrates through the top of the safety valve body 1 in a sliding manner, a positive magnetic ring 4 is fixedly arranged on the upper end face of the safety valve body 1 in an embedding manner, a cover plate 202 is fixedly connected to the upper end of the valve rod 201, and if the steam pressure is higher than a given value, the valve core 2 is driven to open upwards in the safety valve body 1 by the steam pressure, the spring 3 is contracted, the cover plate 202 and the valve rod 201 are synchronously lifted, at the moment, the valve core 2 is used for removing the blocking of each steam outlet 101, steam can be discharged from the steam outlet 101 through the steam inlet 103 and the steam outlet 101 for pressure relief, the negative magnetic ring 5 is fixedly embedded at the position of the bottom end surface of the cover plate 202 corresponding to the positive magnetic ring 4, adsorption force can be generated between the positive magnetic ring 4 and the negative magnetic ring 5, if the steam pressure is suddenly reduced below a given value, the spring 3 and the adsorption force are used for driving the valve core 2 to reset and close along the safety valve body 1, the cover plate 202 and the valve rod 201 are synchronously lowered, at the moment, the negative magnetic ring 5 is close to the positive magnetic ring 4, the adsorption force is gradually increased, and the valve core 2 can be promoted to rapidly block each steam outlet 101.

As a preferred implementation manner in this embodiment, as shown in fig. 1 and 3, the number of steam outlets 101 is four, and the steam outlets 101 are distributed on the side of the safety valve body 1 at equal intervals in a circular shape.

As a preferred implementation manner in this embodiment, as shown in fig. 1, the outside of the safety valve body 1 is fixedly connected with a steam outlet nozzle 6 which is connected with a steam outlet 101, and the outer end of the steam outlet nozzle 6 is fixedly provided with a protective screen 601, so as to achieve the purpose of preventing external impurities from easily entering the steam outlet nozzle 6.

As a preferred implementation manner in this embodiment, as shown in fig. 1, the cross-sectional shape of the steam outlet nozzle 6 is conical, and the outer end caliber of the steam outlet nozzle 6 is larger than the inner end caliber, so that the steam outlet nozzle 6 has good steam discharging effect during pressure relief.

As a preferred embodiment in this embodiment, as shown in fig. 2, a sealing ring 104 is fixedly disposed at the upper end of the blocking seat 102, a groove 203 is formed on the bottom end surface of the valve core 2, and the sealing ring 104 is adapted to the groove 203, so that the sealing ring 104 can be embedded in the groove 203 in a matching manner, the sealing effect between the valve core 2 and the blocking seat 102 is ensured, and the overall sealing performance of the safety valve is further improved.

As a preferred implementation manner in this embodiment, as shown in fig. 1, a valve seat 7 is fixedly disposed at the bottom end of the safety valve body 1, and an installation screw cavity 701 communicated with the inside of the safety valve body 1 is formed on the valve seat 7, so as to achieve the purpose of facilitating the communication installation of the safety valve.

Working principle:

In the process of using the safety valve, if the steam pressure is higher than a given value, the steam pressure is utilized to drive the valve core 2 to open upwards along the safety valve body 1, the spring 3 is contracted, the cover plate 202 and the valve rod 201 rise synchronously, at the moment, the valve core 2 cancels the blocking of each steam outlet 101, steam can be discharged from the steam outlet 103, the steam outlet 101 and the steam outlet 6 for pressure relief, adsorption force can be generated between the positive magnetic ring 4 and the negative magnetic ring 5, if the steam pressure is lower than the given value, the spring 3 and the adsorption force are utilized to drive the valve core 2 to reset and close along the safety valve body 1, the cover plate 202 and the valve rod 201 descend synchronously, at the moment, the negative magnetic ring 5 is close to the positive magnetic ring 4, the adsorption force is gradually increased, the valve core 2 can be promoted to rapidly block each steam outlet 101, the blocking seat 102 blocks and limits the valve core 2, and the sealing ring 104 is matched and embedded in the groove 203, and the pressure relief can be stopped.

The foregoing has shown and described the basic principles, principal features and advantages of the utility model. It will be understood by those skilled in the art that the present utility model is not limited to the above-described embodiments, and that the above-described embodiments and descriptions are only preferred embodiments of the present utility model, and are not intended to limit the utility model, and that various changes and modifications may be made therein without departing from the spirit and scope of the utility model as claimed. The scope of the utility model is defined by the appended claims and equivalents thereof.

Claims (6)

1. The utility model provides a can avoid relief pressure excessively relief valve, includes relief valve body (1), its characterized in that, the lateral part of relief valve body (1) is spaced apart and is equipped with a plurality of steam outlets (101), the inside sliding connection of relief valve body (1) has case (2) that are used for shutoff steam outlets (101), fixedly connected with spring (3) between relief valve body (1) and case (2), the inside of relief valve body (1) is located the below of case (2) fixedly provided with fender seat (102), steam inlets (103) have been seted up on the surface of fender seat (102), the upper end fixedly connected with valve rod (201) of case (2), valve rod (201) slip runs through in the top of relief valve body (1), the up end of relief valve body (1) inlays fixedly arranged in and has positive magnetic ring (4), the upper end fixedly connected with apron (202) of valve rod (201), the bottom face of apron (202) inlays fixedly arranged in the position department corresponding to positive magnetic ring (4) and has negative magnetic ring (5).

2. The safety valve capable of avoiding excessive pressure relief according to claim 1, wherein the number of the steam outlets (101) is four, and the steam outlets (101) are distributed on the side part of the safety valve body (1) at equal intervals in a circular shape.

3. The safety valve capable of avoiding excessive pressure relief according to claim 1, wherein the outer side of the safety valve body (1) is fixedly connected with a steam outlet nozzle (6) communicated with a steam outlet port (101), and the outer end part of the steam outlet nozzle (6) is fixedly provided with a protective net cover (601).

4. A safety valve capable of avoiding excessive pressure relief according to claim 3, wherein the cross-sectional shape of the steam outlet nozzle (6) is conical, and the diameter of the outer end of the steam outlet nozzle (6) is larger than the diameter of the inner end.

5. The safety valve capable of avoiding excessive pressure relief according to claim 1, wherein a sealing ring (104) is fixedly arranged at the upper end of the blocking seat (102), a groove (203) is formed in the bottom end surface of the valve core (2), and the sealing ring (104) is matched with the groove (203).

6. The safety valve capable of avoiding excessive pressure relief according to claim 1, wherein a valve seat (7) is fixedly arranged at the bottom end of the safety valve body (1), and a mounting screw cavity (701) communicated with the inside of the safety valve body (1) is formed in the valve seat (7).