Ammonia gas sealing screw

Abstract

The utility model provides an ammonia gas sealing screw, which relates to the technical field of industrial sealing elements and comprises a sealing screw body, an adjusting screw is vertically arranged in a sealing sleeve, a gas guide through hole is formed in the center of the bottom end of the sealing sleeve, a sealing plug is arranged in the gas guide through hole, and the top of the sealing plug is connected with a limiting table. A positioning polished rod is arranged in the limiting table, the top end of the positioning polished rod is connected with the bottom end of the adjusting screw rod, a U-shaped pressure relief channel is distributed on the circumference of the bottom face of the sealing sleeve, and when the internal pressure intensity is too large, air enters through the U-shaped pressure relief channel to jack up the limiting table, so that the sealing plug is driven to be separated from the air guide through hole, opening of the air guide through hole is achieved, and pressure relief is achieved; the whole device can achieve automatic pressure relief treatment when the pressure is too large, automatic sealing is achieved under the influence of gravity after the pressure is recovered, accidents such as explosion caused by too large pressure are effectively avoided, manual intervention is not needed, automatic pressure relief and automatic closing are achieved, the structure is simple, and safety is high.

Description

Technical Field

[0001] The utility model relates to the technical field of industrial seals, in particular to an ammonia sealing screw. Background Art

[0002] In ammonia processing and transmission systems, due to the high pressure, corrosiveness, flammability and explosiveness of ammonia, extremely high requirements are placed on the sealing performance of connecting pipes. Traditional sealing methods often rely on complex sealing structures or regular manual inspection and maintenance, which not only increases the complexity and maintenance costs of the system, but may also cause sealing failure due to human negligence or equipment aging, thereby causing safety accidents.

[0003] In the prior art, when the industrial ammonia sealing screw is used, only a direct sealing structure is generally used. In response to pressure changes, such as when the pressure is too high, automatic adjustment cannot be performed, resulting in low overall safety. Utility Model Content

[0004] The utility model aims to solve the shortcomings of the prior art that the ammonia gas seal cannot be self-regulated for pressure relief and the safety is not high, and proposes an ammonia gas sealing screw.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: a sealing screw for ammonia, comprising a sealing screw body, the sealing screw body comprising a sealing sleeve and a sealing nut, an adjusting screw is vertically arranged inside the sealing sleeve, an air guide hole is opened at the center position of the bottom end of the sealing sleeve, a sealing plug is arranged inside the air guide hole, a limit platform is connected to the top of the sealing plug, a positioning light rod is arranged inside the limit platform, the top of the positioning light rod is connected to the bottom end of the adjusting screw, and U-shaped pressure relief channels are distributed circumferentially on the bottom surface of the sealing sleeve, and one end of the U-shaped pressure relief channel is located on the bottom surface of the limit platform.

[0006] Preferably, the top end of the U-shaped pressure relief channel penetrates the inner bottom surface of the sealing sleeve, a limit plug is provided on the bottom surface of the limit platform, and the limit plug is located inside one end where the U-shaped pressure relief channel abuts against the limit platform.

[0007] Preferably, the U-shaped pressure relief channel and the limit plug are evenly distributed in a circular array along the interior of the sealing sleeve, and the bottom surface of the limit platform abuts against the bottom surface of the interior of the sealing sleeve.

[0008] Preferably, the outer wall of the top end of the sealing sleeve is threadedly connected to the inner wall of the sealing nut, and the top end of the adjusting screw penetrates the surface of the sealing nut.

[0009] Preferably, an ammonia connecting pipe is provided through the surface of the sealing screw sleeve, and the gas guide hole and the sealing plug are interference fit.

[0010] Preferably, the vertical centerline axis of the positioning polished rod, the vertical center axis of the adjusting screw, the vertical center axis of the sealing sleeve, the vertical center axis of the limiting platform and the vertical center axis of the sealing plug all coincide with each other.

[0011] Preferably, the inner wall of the limiting platform abuts against the outer edge of the sealing plug, and the top surface of the sealing plug abuts against the inner top surface of the limiting platform.

[0012] Beneficial Effects

[0013] In the utility model, a sealing screw body is adopted to seal the access of the ammonia connecting pipe through the cooperation of the sealing sleeve and the adjusting screw. The sealing environment inside the sealing sleeve is maintained by the connection between the sealing plug and the air guide through hole. When the internal pressure is too high, air enters through the U-shaped pressure relief channel to lift the limit table, thereby driving the sealing plug to separate from the air guide through hole, realizing the opening of the air guide through hole, thereby realizing pressure relief, so that the whole device can realize automatic pressure relief processing when the pressure is too high, and automatically seal under the influence of gravity after the pressure is restored, effectively avoiding the occurrence of accidents such as explosion due to excessive pressure, and realizing automatic pressure relief and automatic closing without manual intervention. The structure is simple and the safety is high. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 This is the internal structure diagram of the sealing sleeve of the utility model;

[0015] Figure 2 This is a disassembled structural diagram of the sealing screw body of the utility model;

[0016] Figure 3 It is a three-dimensional structural diagram of the utility model;

[0017] Figure 4 This is a structural diagram of the bottom surface of the sealing sleeve of the utility model.

[0018] Legend:

[0019] 1. Sealing screw body; 101. Sealing sleeve; 102. Sealing nut; 103. Ammonia connecting pipe; 104. Air guide hole; 105. Adjusting screw; 106. Positioning rod; 107. Limiting platform; 108. Limiting plug; 109. Sealing plug; 110. U-shaped pressure relief channel. DETAILED DESCRIPTION

[0020] In order to make the technical means, creative features, objectives and effects of the present invention easy to understand, the present invention is further described below in conjunction with specific embodiments and drawings, but the following embodiments are only preferred embodiments of the present invention, not all. Based on the embodiments in the implementation mode, other embodiments obtained by those skilled in the art without creative work are all within the protection scope of the present invention.

[0021] The specific embodiments of the present utility model are described below in conjunction with the accompanying drawings. Specific embodiment one:

[0023] Reference Figure 1-4 A sealing screw for ammonia includes a sealing screw body 1, which includes a sealing sleeve 101 and a sealing nut 102. The outer wall of the top end of the sealing sleeve 101 is threadedly connected to the inner wall of the sealing nut 102. The top end of the adjusting screw 105 penetrates the surface of the sealing nut 102. An ammonia connecting pipe 103 penetrates the surface of the sealing screw sleeve. The sealing screw body 1 is composed of the sealing sleeve 101 and the sealing nut 102. The ammonia connecting pipe 103 is firmly connected to the sealing sleeve 101 through the tightening effect of the sealing nut 102. The adjusting screw 105 vertically arranged inside the sealing sleeve 101 is used to fine-tune the connection tightness to ensure the stability of the connection.

[0024] When the entire sealing sleeve 101 is used for automatic pressure relief and reset, since the sealing sleeve 101 is vertically provided with an adjusting screw 105, an air guide hole 104 is opened at the center of the bottom end of the sealing sleeve 101, and a sealing plug 109 is provided inside the air guide hole 104. The air guide hole 104 and the sealing plug 109 are interference fit. A limit platform 107 is connected to the top of the sealing plug 109, and a positioning light rod 106 is provided inside the limit platform 107, so that the sealing plug 109 can fit tightly with the air guide hole 104. The external air is effectively isolated, the sealed environment inside the sealing sleeve 101 is maintained, and the leakage of ammonia is prevented. The top of the positioning light rod 106 is connected to the bottom of the adjusting screw 105. The bottom surface of the sealing sleeve 101 is circumferentially distributed with a U-shaped pressure relief channel 110, and one end of the U-shaped pressure relief channel 110 is located at the bottom surface of the limit platform 107. When the pressure inside the sealing sleeve 101 is too high due to excessive ammonia filling or temperature rise, the pressure acts on the bottom surface of the limit platform 107 through the U-shaped pressure relief channel 110. The air can enter the channel along the end of the U-shaped pressure relief channel 110 that penetrates the sealing sleeve 101, flow to the end that abuts against the limit platform 107, smoothly enter and act on the limit platform 107, and generate an upward thrust. When the thrust is large enough, the limit platform 107 is lifted up, thereby driving the sealing plug 109 to separate from the air guide hole 104, and the air guide hole 104 is opened to achieve automatic pressure relief. When the internal pressure drops to a safe range, due to the gravity of the sealing plug 109 and the limit platform 107, the sealing plug 109 is 09 will return to the air guide hole 104 to achieve automatic sealing and restore the sealing state of the sealing sleeve 101. The sealing screw design can effectively prevent the leakage of ammonia under high pressure. At the same time, through the automatic pressure relief mechanism, the pressure can be quickly released when the internal pressure rises abnormally, avoiding safety accidents and ensuring the safety of production equipment and operators. The mechanical structure is used to achieve automatic pressure relief and automatic sealing without manual intervention, which improves the intelligence level and automation degree of the equipment and reduces the difficulty of operation and labor costs.

[0025] In order to ensure the pressure relief and reset operation of the entire device, the top of the U-shaped pressure relief channel 110 is set to penetrate the bottom surface of the inner part of the sealing sleeve 101, and the bottom surface of the limit platform 107 is provided with a limit plug 108, and the limit plug 108 is located inside the end where the U-shaped pressure relief channel 110 and the limit platform 107 are against each other. The U-shaped pressure relief channel 110 and the limit plug 108 are evenly distributed in a circular array along the inside of the sealing sleeve 101, and the bottom surface of the limit platform 107 is against the bottom surface of the inner part of the sealing sleeve 101, ensuring that the limit platform 107 and the U-shaped pressure relief channel 110 are in contact with each other. 10 is connected, the vertical center line axis of the positioning light rod 106, the vertical center axis of the adjusting screw 105, the vertical center axis of the sealing sleeve 101, the vertical center axis of the limit platform 107 and the vertical center axis of the sealing plug 109 all coincide with each other, which is convenient for the entire pressure jacking, ensures the consistency of the path, avoids the generation of force components in other directions, and causes vertical force dispersion. The inner wall of the limit platform 107 abuts against the outer edge of the sealing plug 109, and the top surface of the sealing plug 109 abuts against the inner top surface of the limit platform 107. Specific embodiment 2:

[0027] Reference Figure 1-4 The sealing screw is not only suitable for ammonia systems, but can also be appropriately modified as needed and used in other occasions that require high-pressure sealing and automatic pressure relief functions. It has strong versatility and adaptability.

[0028] In actual use, the sealing plug 109 between the limit platform 107 and the U-shaped pressure relief channel 110 can be used. Since the U-shaped pressure relief channel 110 does not penetrate the outside, the limit platform 107 only needs to ensure that the bottom surface is against one end of the U-shaped pressure relief channel 110 to complete the above-mentioned automatic pressure relief and reset operations. By adding the limit plug 108, since a certain amount of force is required for the limit plug 108 to directly separate from the U-shaped pressure relief channel 110, the pressure relief threshold can be increased by adding the limit plug 108, and it can be adjusted according to actual usage.

[0029] In summary:

[0030] The sealing screw body 1 is used to seal the ammonia connecting pipe 103 through the cooperation of the sealing sleeve 101 and the adjusting screw 105. The sealing environment inside the sealing sleeve 101 is maintained by connecting the sealing plug 109 with the air guide hole 104. When the internal pressure is too high, air enters through the U-shaped pressure relief channel 110 to lift the limit platform 107, thereby driving the sealing plug 109 to separate from the air guide hole 104, and realizing the opening of the air guide hole 104, thereby realizing pressure relief, so that the entire device can realize automatic pressure relief processing when the pressure is too high, and automatically seal under the influence of gravity after the pressure is restored, effectively avoiding the occurrence of accidents such as explosion due to excessive pressure, and realizing automatic pressure relief and automatic closing without manual intervention, with simple structure and high safety.

[0031] In the present utility model, unless otherwise clearly specified and limited, a first feature being "above" or "below" a second feature may include that the first and second features are in direct contact, or may include that the first and second features are not in direct contact but are in contact through another feature between them. Moreover, a first feature being "above", "above" and "above" a second feature includes that the first feature is directly above and obliquely above the second feature, or simply indicates that the first feature is higher in level than the second feature. A first feature being "below", "below" and "below" a second feature includes that the first feature is directly below and obliquely below the second feature, or simply indicates that the first feature is lower in level than the second feature.

[0032] 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. An ammonia sealing screw, comprising a sealing screw body (1), characterized in that: The sealing screw body (1) comprises a sealing sleeve (101) and a sealing nut (102); an adjusting screw (105) is vertically arranged inside the sealing sleeve (101); an air guide hole (104) is opened at the center of the bottom end of the sealing sleeve (101); a sealing plug (109) is arranged inside the air guide hole (104); a limit platform (107) is connected to the top of the sealing plug (109); a positioning rod (106) is arranged inside the limit platform (107); the top end of the positioning rod (106) is connected to the bottom end of the adjusting screw (105); a U-shaped pressure relief channel (110) is distributed circumferentially on the bottom surface of the sealing sleeve (101), and one end of the U-shaped pressure relief channel (110) is located on the bottom surface of the limit platform (107).

2. The sealing screw for ammonia according to claim 1, characterized in that: The top end of the U-shaped pressure relief channel (110) penetrates the inner bottom surface of the sealing sleeve (101), and a limit plug (108) is provided on the bottom surface of the limit platform (107), and the limit plug (108) is located inside the end where the U-shaped pressure relief channel (110) and the limit platform (107) abut against each other.

3. The sealing screw for ammonia according to claim 2, characterized in that: The U-shaped pressure relief channel (110) and the stopper (108) are evenly distributed in a circular array along the interior of the sealing sleeve (101), and the bottom surface of the stopper (107) abuts against the bottom surface of the interior of the sealing sleeve (101).

4. The sealing screw for ammonia according to claim 1, characterized in that: The outer wall of the top end of the sealing sleeve (101) is threadedly connected to the inner wall of the sealing nut (102), and the top end of the adjusting screw (105) penetrates the surface of the sealing nut (102).

5. The ammonia sealing screw according to claim 1, characterized in that: An ammonia connecting pipe (103) is provided through the surface of the sealing screw sleeve, and the gas guide hole (104) and the sealing plug (109) are in interference fit.

6. The ammonia sealing screw according to claim 1, characterized in that: The vertical centerline axis of the positioning polished rod (106), the vertical center axis of the adjusting screw (105), the vertical center axis of the sealing sleeve (101), the vertical center axis of the limiting platform (107) and the vertical center axis of the sealing plug (109) all coincide with each other.

7. The sealing screw for ammonia according to claim 1, characterized in that: The inner wall of the limiting platform (107) abuts against the outer edge of the sealing plug (109), and the top surface of the sealing plug (109) abuts against the inner top surface of the limiting platform (107).

Images