Safety valve capable of avoiding excessive pressure relief

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, a plurality of steam outlets are arranged on the side portion of the safety valve body at intervals, a valve core used for blocking the steam outlets is connected inside the safety valve body in a sliding mode, and a spring is fixedly connected between the safety valve body and the valve core. A blocking seat is fixedly arranged in the safety valve body and located below the valve element, a steam vent is formed in the surface of the blocking seat, a valve rod is fixedly connected to the upper end of the valve element and penetrates through the top of the safety valve body in a sliding mode, and a positive magnetic ring is fixedly installed on the upper end face of the safety valve body in an embedded mode. According to the pressure relief valve, the valve element can be promoted to quickly plug all the steam outlets, the time needed for completing the reset closing action of the valve element is shortened, and therefore the situation that excessive pressure relief is prone to occurring is avoided.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a safety valve capable of avoiding excessive pressure release. Background Art

[0002] Safety valves, also known as pressure relief valves, are mostly valves that use springs to keep them closed and automatically open when the pressure exceeds a given value. They belong to the category of automatic valves. Safety valves play a role in protecting the safety of equipment and controlling the pressure within a safe pressure range. They play an important role in protecting personal safety and equipment operation. They are widely used in steam boilers, pressure pipes, and pressure vessels. During the use of existing safety valves, if the steam pressure drops sharply below a given value, the valve core is reset and closed only by a spring, which results in a long time required to complete the valve core reset and closing action. Excessive pressure relief may occur, affecting the use effect of the safety valve. Therefore, we propose a safety valve that can avoid excessive pressure relief to solve the above problems. Utility Model Content

[0003] The utility model aims to provide a safety valve which can avoid excessive pressure release, so as to solve the problems raised in the above-mentioned background technology.

[0004] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0005] A safety valve that can avoid excessive pressure release comprises a safety valve body, a plurality of steam outlets are arranged at intervals on the side of the safety valve body, a valve core for blocking the steam outlet is slidably connected inside the safety valve body, a spring is fixedly connected between the safety valve body and the valve core, a stopper is fixedly arranged inside the safety valve body below the valve core, a steam outlet is arranged on the surface of the stopper, a valve stem is fixedly connected to the upper end of the valve core, the valve stem slides through the top of the safety valve body, a positive magnetic ring is embedded and fixedly installed on the upper end surface of the safety valve body, a cover plate is fixedly connected to the upper end of the valve stem, and a negative magnetic ring is embedded and fixedly installed at the bottom end surface of the cover plate corresponding to the positive magnetic ring.

[0006] Preferably, the number of the steam outlets is four, and the steam outlets are distributed in a circular shape and at equal intervals on the side of the safety valve body.

[0007] Preferably, a steam outlet nozzle communicated with the steam outlet is fixedly connected to the outer side of the safety valve body, and a protective mesh cover is fixedly installed on the outer end of the steam outlet nozzle.

[0008] Preferably, the cross-sectional shape of the steam outlet nozzle is conical, and the outer port diameter of the steam outlet nozzle is larger than the inner port diameter.

[0009] Preferably, a sealing ring is fixedly provided on the upper end of the stop seat, a groove is provided on the bottom end surface of the valve core, and the sealing ring is matched with the groove.

[0010] Preferably, a valve seat is fixedly provided at the bottom end of the safety valve body, and a mounting screw cavity communicating with the interior of the safety valve body is provided on the valve seat.

[0011] Compared with the prior art, the beneficial effects of the utility model are:

[0012] 1. The utility model utilizes the steam pressure higher than a given value to drive the valve core to open upward along the safety valve body, the spring contracts, and the cover plate and the valve stem rise synchronously. At this time, the valve core stops blocking various steam outlets, and the steam can be discharged through the steam port, the steam outlet and the steam outlet nozzle for pressure relief. An adsorption force can be generated between the positive magnetic ring and the negative magnetic ring. If the steam pressure drops below a given value suddenly, the spring and the adsorption force are utilized to drive the valve core to reset and close along the safety valve body, and the cover plate and the valve stem drop synchronously. At this time, the negative magnetic ring is close to the positive magnetic ring, and the adsorption force gradually increases, which can prompt the valve core to quickly block various steam outlets, which is beneficial to shorten the time required for the valve core to reset and close, thereby avoiding the excessive pressure relief and ensuring the use effect of the safety valve.

[0013] 2. The utility model provides a sealing ring and a groove, and the sealing ring and the groove are adapted to each other, so that the sealing ring can be embedded in the groove to ensure the sealing effect between the valve core and the stopper, and further improve the overall sealing performance of the safety valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 It is a schematic cross-sectional structure diagram of a safety valve capable of avoiding excessive pressure relief according to the utility model after the valve core is reset and closed;

[0015] Figure 2 for Figure 1 A schematic diagram of the enlarged structure of part A;

[0016] Figure 3 It is a three-dimensional structural schematic diagram of a safety valve capable of avoiding excessive pressure relief according to the utility model after the valve core is reset and closed;

[0017] Figure 4 The utility model is a schematic diagram of the cross-sectional structure of a safety valve capable of avoiding excessive pressure relief after the valve core moves upward and opens.

[0018] In the figure: 1. safety valve body; 101. steam outlet; 102. stopper; 103. steam vent; 104. sealing ring; 2. valve core; 201. valve stem; 202. cover plate; 203. groove; 3. spring; 4. positive magnetic ring; 5. negative magnetic ring; 6. steam outlet nozzle; 601. protective mesh cover; 7. valve seat; 701. mounting screw chamber. DETAILED DESCRIPTION

[0019] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0020] See also Figure 1-Figure 4 As shown, a technical solution provided by the utility model:

[0021] A safety valve capable of avoiding excessive pressure relief comprises a safety valve body 1, a plurality of steam outlets 101 are arranged at intervals on the side of the safety valve body 1, a valve core 2 for blocking the steam outlet 101 is slidably connected inside the safety valve body 1, a spring 3 is fixedly connected between the safety valve body 1 and the valve core 2, a stopper 102 is fixedly arranged below the valve core 2 inside the safety valve body 1, a steam port 103 is arranged on the surface of the stopper 102, a valve stem 201 is fixedly connected to the upper end of the valve core 2, the valve stem 201 slides through the top of the safety valve body 1, a positive magnetic ring 4 is embedded and fixedly installed on the upper end surface of the safety valve body 1, a cover plate 202 is fixedly connected to the upper end of the valve stem 201, and if the steam pressure is higher than a given value, the steam pressure is used to drive the valve core 2 along the safety valve The cover plate 202 and the valve stem 201 rise synchronously therewith, and at this time, the valve core 2 stops blocking the steam outlets 101, and the steam can be discharged through the steam vent 103 and the steam outlet 101 for pressure relief. A negative magnetic ring 5 is embedded and fixedly installed at the corresponding position of the bottom end surface of the cover plate 202 and the positive magnetic ring 4, and an adsorption force can be generated between the positive magnetic ring 4 and the negative magnetic ring 5. If the steam pressure drops suddenly below a given value, the spring 3 and the adsorption force drive the valve core 2 to reset and close along the safety valve body 1, and the cover plate 202 and the valve stem 201 drop synchronously therewith. At this time, the negative magnetic ring 5 is close to the positive magnetic ring 4, so that the adsorption force gradually increases, which can prompt the valve core 2 to quickly block the steam outlets 101.

[0022] As a preferred implementation in this embodiment, Figure 1 and Figure 3 As shown, there are four steam outlets 101 , and the steam outlets 101 are distributed on the side of the safety valve body 1 in a circular shape and at equal intervals.

[0023] As a preferred implementation in this embodiment, Figure 1 As shown, a steam outlet nozzle 6 connected to the steam outlet 101 is fixedly connected to the outer side of the safety valve body 1, and a protective mesh cover 601 is fixedly installed on the outer end of the steam outlet nozzle 6 to prevent external impurities from easily entering the steam outlet nozzle 6.

[0024] As a preferred implementation in this embodiment, Figure 1 As shown, the cross-sectional shape of the steam outlet nozzle 6 is conical, and the outer diameter of the steam outlet nozzle 6 is larger than the inner diameter, so as to ensure that the steam outlet nozzle 6 has a good discharge effect on the steam when the pressure is released.

[0025] As a preferred implementation in this embodiment, Figure 2 As shown, a sealing ring 104 is fixedly provided on the upper end of the stopper 102, and a groove 203 is provided on the bottom end surface of the valve core 2. The sealing ring 104 is adapted to the groove 203 so that the sealing ring 104 can be embedded in the groove 203 to ensure the sealing effect between the valve core 2 and the stopper 102, thereby further improving the overall sealing performance of the safety valve.

[0026] As a preferred implementation in this embodiment, Figure 1 As shown, a valve seat 7 is fixedly provided at the bottom end of the safety valve body 1, and a mounting screw cavity 701 communicating with the interior of the safety valve body 1 is provided on the valve seat 7, so as to facilitate the connecting installation of the safety valve.

[0027] Working principle:

[0028] When using the safety valve, if the steam pressure is higher than a given value, the steam pressure is used to drive the valve core 2 to open upward along the safety valve body 1, the spring 3 contracts, and the cover plate 202 and the valve stem 201 rise synchronously. At this time, the valve core 2 cancels the blocking of each steam outlet 101, and the steam can be discharged through the steam port 103, the steam outlet 101 and the steam outlet nozzle 6 for pressure relief. An adsorption force can be generated between the positive magnetic ring 4 and the negative magnetic ring 5. If the steam pressure suddenly drops below a given value, the spring 3 and the adsorption force are used to drive the valve core 2 to reset and close along the safety valve body 1, and the cover plate 202 and the valve stem 201 drop synchronously. At this time, the negative magnetic ring 5 is close to the positive magnetic ring 4, and the adsorption force gradually increases, which can prompt the valve core 2 to quickly block each steam outlet 101, the stop seat 102 blocks and limits the valve core 2, and the sealing ring 104 is embedded in the groove 203 to stop the pressure relief.

[0029] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments. The above embodiments and descriptions are only preferred examples of the utility model and are not used to limit the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, which fall within the scope of the utility model to be protected. The scope of protection of the utility model is defined by the attached claims and their equivalents.

Claims

1. A safety valve capable of preventing excessive pressure relief, comprising a safety valve body (1), characterized in that: A plurality of steam outlets (101) are arranged at intervals on the side of the safety valve body (1); a valve core (2) for blocking the steam outlet (101) is slidably connected inside the safety valve body (1); a spring (3) is fixedly connected between the safety valve body (1) and the valve core (2); a stopper (102) is fixedly arranged inside the safety valve body (1) below the valve core (2); a steam outlet (103) is provided on the surface of the stopper (102); a valve stem (201) is fixedly connected to the upper end of the valve core (2); the valve stem (201) slides through the top of the safety valve body (1); a positive magnetic ring (4) is embedded and fixedly installed on the upper end surface of the safety valve body (1); a cover plate (202) is fixedly connected to the upper end of the valve stem (201); a negative magnetic ring (5) is embedded and fixedly installed at a position corresponding to the positive magnetic ring (4) on the bottom end surface of the cover plate (202).

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

3. A safety valve capable of avoiding excessive pressure relief according to claim 1, characterized in that: A steam outlet nozzle (6) which is in communication with the steam outlet (101) is fixedly connected to the outer side of the safety valve body (1), and a protective mesh cover (601) is fixedly mounted on the outer end of the steam outlet nozzle (6).

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

5. A safety valve capable of avoiding excessive pressure relief according to claim 1, characterized in that: A sealing ring (104) is fixedly arranged at the upper end of the blocking seat (102), a groove (203) is provided on the bottom end surface of the valve core (2), and the sealing ring (104) is adapted to fit the groove (203).

6. A safety valve capable of avoiding excessive pressure relief according to claim 1, characterized in that: A valve seat (7) is fixedly arranged at the bottom end of the safety valve body (1), and a mounting screw cavity (701) communicating with the interior of the safety valve body (1) is provided on the valve seat (7).

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