Duplex limiting spring safety valve

Abstract

The utility model discloses a duplex limit spring safety valve, which relates to the technical field of spring safety valves and comprises a valve body, the top of the valve body is movably communicated with a pressure relief pipeline, one side of the pressure relief pipeline is fixedly communicated with a connecting flange, the outer wall of the valve body is fixedly connected with a cooling sleeve, and an extension piece is fixedly connected between the valve body and the cooling sleeve. The cooling sleeve is arranged on the valve body, cooling liquid can be injected into the space between the valve body and the cooling sleeve through the water supply pipeline in the using process, heat in the valve body is taken away in the mode, the cooling effect is good, and the service life of the valve body is prolonged. And the problem that the spring is softened due to the fact that the elastic modulus of a spring material is reduced due to the high temperature is solved, the problem that the spring is prone to creep deformation when the safety valve is located in the high-temperature environment for a long time is solved through cooling treatment, and it is guaranteed that the safety valve can be normally used in the high-temperature environment.

Description

TECHNICAL FIELD

[0001] The utility model relates to spring safety valve technical field especially relates to double limit spring safety valve. BACKGROUND

[0002] Safety valve is the safety device for preventing pressure equipment and container from causing pressure to rise or the pressure in container from exceeding the limit and bursting, and the double spring safety valve is composed of two A47H and A48Y type safety valves of the same specification on a Y type joint, and the nominal diameter of the double spring safety valve refers to the inlet diameter of the Y type joint.

[0003] For example, the utility model discloses a spring safety valve, including safety valve body, the spring in safety valve body, the side surface of safety valve body is connected with inlet pipe and outlet pipe, and the first flange is arranged at the one end of inlet pipe, outlet pipe, the second flane is arranged at the lower side of safety valve body, the anticorrosion mechanism is arranged on the outer wall of safety valve body, and the anticorrosion mechanism includes two mutually symmetrical anticorrosion housings.

[0004] However, in the prior art, when the medium to be delivered is in a high-temperature state, the high temperature will reduce the elastic modulus of the spring material, causing the spring to become soft, and under the same pressure, the deformation of the spring will increase, thereby reducing the opening pressure of the safety valve, which can easily cause the safety valve to open prematurely when the system pressure has not reached the designed opening pressure, and the spring is also prone to creep in a long-term high-temperature environment, that is, the spring will gradually deform plastically under a constant load over time, which will further reduce the stiffness of the spring and affect the normal operation of the safety valve, and even cause the safety valve to fail to normally reset, resulting in continuous leakage of the medium. UTILITY MODEL CONTENTS

[0005] The utility model discloses a double limit spring safety valve to solve the problems in the prior art that high temperature will reduce the elastic modulus of the spring material, causing the spring to become soft, and under the same pressure, the deformation of the spring will increase, thereby reducing the opening pressure of the safety valve, which can easily cause the safety valve to open prematurely when the system pressure has not reached the designed opening pressure, and the spring is also prone to creep in a long-term high-temperature environment.

[0006] To achieve the above object, the utility model adopts the following technical scheme: a double limit spring safety valve, comprising a valve body, a pressure relief pipeline movably connected to the top of the valve body, a connecting flange fixedly connected to one side of the pressure relief pipeline;

[0007] A cooling sleeve is fixedly connected to the outer wall of the valve body, an extension piece is fixedly connected between the valve body and the cooling sleeve, a flow guide piece with a shape matching that of the valve body is fixedly installed on the outer wall of the valve body, and water supply pipelines are fixedly connected to the two sides of the cooling sleeve.

[0008] Preferably, the top of the pressure relief pipeline is fixedly installed with a hollow frame, and the inside of the hollow frame is fixedly installed with a limiting spring.

[0009] Preferably, one end of the limiting spring is fixedly connected with a valve core, and the valve core is slidingly connected in the inside of the pressure relief pipeline.

[0010] Preferably, a reinforcing rod is fixedly installed on the outer wall of the valve body, and the reinforcing rod penetrates through the cooling sleeve.

[0011] Preferably, a control rod is rotationally connected to the top of the hollow frame, and the control rod is fixedly connected with the limiting spring.

[0012] Preferably, a threaded groove is formed in the inner tube wall of the valve body, and the pressure relief pipeline is screwedly connected with the valve body through the threaded groove.

[0013] Compared with the prior art, the utility model has the advantages and positive effects that:

[0014] 1、in the utility model, the cooling sleeve is arranged on the valve body, in the process of using, the water supply pipeline can inject cooling liquid between the valve body and the cooling sleeve, the heat in the valve body is taken away through this mode, the problem that the high temperature can reduce the elastic modulus of the spring material and cause the spring to be soft is solved, the problem that the spring is prone to creep phenomenon in the long-term high temperature environment is avoided through the cooling treatment, and it is ensured that the safety valve can be normally used in the high temperature environment.

[0015] 2、in the utility model, the reinforcing rod is arranged to improve the structural stability of the cooling sleeve, prevent the cooling sleeve from shaking, and the existence of the hollow frame can also ensure that the limiting spring does not dislocate, and it is ensured that the valve core can stably be in the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0016] Figure 1 a perspective view of the double limiting spring safety valve is provided for the utility model;

[0017] Figure 2 a valve body top view of the double limiting spring safety valve is provided for the utility model;

[0018] Figure 3 a cooling sleeve internal structure schematic view of the double limiting spring safety valve is provided for the utility model;

[0019] Figure 4 a valve body perspective structure schematic view of the double limiting spring safety valve is provided for the utility model.

[0020] Legend: 1, valve body; 2, pressure relief pipeline; 3, hollow frame; 4, limit spring; 5, control rod; 6, connecting flange; 7, cooling sleeve; 8, water supply pipeline; 9, threaded groove; 10, extension piece; 11, reinforcing rod; 12, guide vane; 13, valve core. DETAILED DESCRIPTION

[0021] In order to enable the above-mentioned purposes, features and advantages of the present application to be more clearly understood, the present application will be further described below with reference to the drawings and embodiments. It should be noted that the embodiments of the present application and the features in the embodiments can be combined with each other without conflict.

[0022] In the following description, many specific details are set forth in order to provide a thorough understanding of the present application, but the present application can also be practiced in other ways different from those described herein, therefore, the present application is not limited to the specific embodiments disclosed in the following description.

[0023] Embodiment one: as shown in Figure 1 , Figure 2 , Figure 3 and Figure 4 , the present application provides a double limit spring safety valve, including valve body 1, the top of valve body 1 is movably connected with pressure relief pipeline 2, one side of pressure relief pipeline 2 is fixedly connected with connecting flange 6;

[0024] The outer wall of valve body 1 is fixedly connected with cooling sleeve 7, valve body 1 and cooling sleeve 7 are fixedly connected with extension piece 10, the outer pipe wall of valve body 1 is fixedly installed with guide vane 12 which is compatible with itself in shape, both sides of cooling sleeve 7 are fixedly connected with water supply pipeline 8;

[0025] The top of pressure relief pipeline 2 is fixedly installed with hollow frame 3, limit spring 4 is fixedly installed in the inside of hollow frame 3, one end of limit spring 4 is fixedly connected with valve core 13, valve core 13 is slidingly connected in the inside of pressure relief pipeline 2, the top of hollow frame 3 is rotatably connected with control rod 5, control rod 5 is fixedly connected with limit spring 4.

[0026] Now the specific settings and effects of the embodiment will be described, valve body 1 is connected with pressure relief pipeline 2, valve core 13 is at the junction of valve body 1 and pressure relief pipeline 2, limit spring 4 pushes valve core 13 in the inside of valve body 1, if the pressure is normal in the process of conveying medium, pressure relief pipeline 2 will not be used, if the pressure is too large, the pressure of medium will push up valve core 13, at this time, pressure relief pipeline 2 is connected with valve body 1, so as to achieve the purpose of pressure relief, after pressure relief, valve core 13 is pushed back into valve body 1, control rod 5 is used for manual operation when the controller fails;

[0027] In use, if the temperature of the medium is high, heat is transferred to the limiting spring 4, the limiting spring 4 is soft in a high-temperature environment for a long time, the deformation of the spring is increased under the same pressure, the opening pressure of the safety valve is reduced, the cooling sleeve 7 arranged on the valve body 1 can accommodate the cooling liquid, in actual use, the cooling liquid is continuously pumped into the space between the cooling sleeve 7 and the valve body 1 by the water supply equipment outside, the extension piece 10 and the flow guide piece 12 on the valve body 1 are completely immersed in the cooling liquid, the continuous flow of the cooling liquid can take away the heat in the valve body 1, thereby reducing the heat transferred to the limiting spring 4, and the limiting spring 4 is protected.

[0028] Embodiment two: as shown in Figure 2 、 Figure 3 and Figure 4 , the reinforcing rod 11 is fixedly installed on the outer wall of the valve body 1, the reinforcing rod 11 penetrates the cooling sleeve 7, the threaded groove 9 is formed in the inner pipe wall of the valve body 1, and the pressure relief pipeline 2 is threadedly connected with the valve body 1 through the threaded groove 9.

[0029] The effect achieved by the whole embodiment is that the pressure relief pipeline 2 is threadedly connected with the valve body 1 through the threaded groove 9, the structural stability of the pressure relief pipeline 2 is ensured, the reinforcing rod 11 is fixedly installed between the two pipelines of the valve body 1, and the reinforcing rod 11 also penetrates the cooling sleeve 7, so that the stability of the cooling sleeve 7 is ensured.

[0030] The use method and working principle of the device are as follows: the pressure relief pipeline 2 is threadedly connected with the valve body 1 through the threaded groove 9, the valve body 1 is communicated with the pressure relief pipeline 2, the valve core 13 is located at the intersection of the valve body 1 and the pressure relief pipeline 2, in the process of conveying the medium, if the pressure is normal, the pressure relief pipeline 2 will not be used, if the pressure is too large, the pressure of the medium will lift the valve core 13, at this time, the pressure relief pipeline 2 is communicated with the valve body 1, so that the purpose of pressure relief is achieved, and after the pressure relief is completed, the valve core 13 is bounced back into the valve body 1 again.

[0031] In use, the cooling liquid is continuously pumped into the space between the cooling sleeve 7 and the valve body 1 by the water supply equipment outside, the extension piece 10 and the flow guide piece 12 on the valve body 1 are completely immersed in the cooling liquid, the continuous flow of the cooling liquid can take away the heat in the valve body 1, thereby reducing the heat transferred to the limiting spring 4, and the limiting spring 4 is protected.

[0032] The above merely describes preferred embodiments of the present application, and is not intended to limit the present application in other forms, and any skilled person in the art can easily modify or change the above disclosed technical content into equivalent embodiments with equivalent changes applied to other fields, but any simple modification, equivalent change and modification made to the above embodiments according to the technical essence of the present application without departing from the technical scheme of the present application still falls within the protection scope of the present application.

Claims

1. Double limit spring safety valve, comprising a valve body (1), characterized in that: The top of the valve body (1) is movably connected with a pressure relief pipeline (2), one side of the pressure relief pipeline (2) is fixedly connected with a connecting flange (6); The outer wall of the valve body (1) is fixedly connected with a cooling sleeve (7), the valve body (1) and the cooling sleeve (7) are fixedly connected with an extension piece (10), the outer wall of the valve body (1) is fixedly installed with a flow guide vane (12) which is compatible with the valve body (1), the two sides of the cooling sleeve (7) are fixedly connected with water supply pipelines (8).

2. The dual limit spring safety valve of claim 1, wherein: The top of the pressure relief pipeline (2) is fixedly installed with a hollow frame (3), the inside of the hollow frame (3) is fixedly installed with a limiting spring (4).

3. The double-limited spring safety valve of claim 2, wherein: One end of the limiting spring (4) is fixedly connected with a valve core (13), the valve core (13) is slidingly connected in the pressure relief pipeline (2).

4. The dual limit spring safety valve of claim 1, wherein: The outer wall of the valve body (1) is fixedly installed with a reinforcing rod (11), the reinforcing rod (11) penetrates through the cooling sleeve (7).

5. The double-limited spring safety valve of claim 2, wherein: The top of the hollow frame (3) is rotatably connected with a control rod (5), the control rod (5) is fixedly connected with the limiting spring (4).

6. The dual limit spring safety valve of claim 1, wherein: The inner wall of the valve body (1) is provided with a threaded groove (9), the pressure relief pipeline (2) is threadedly connected with the valve body (1) through the threaded groove (9).

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