A mechanical sealing structure for graphite sealing ring

Abstract

The utility model relates to the technical field of graphite sealing rings, and provides a mechanical sealing structure for a graphite sealing ring, including a core tube and a sealing structure, wherein the core tube includes a first flange, a first sealing sleeve, a second flange, a second sealing sleeve, a fixing bolt, an annular chamber, a sealing structure, and a reinforcing structure. The utility model is provided with a sealing structure, and by inserting a connecting block on the second half ring into the interior of a fixing groove on the first half ring, the second half ring abuts against a clamping block during the insertion process, so that the abutting force pushes the clamping block to drive a slider to slide inside the slide groove, so that a spring is compressed, and when the clamping block is fixed into the interior of the clamping groove, the first half ring and the second half ring are fixedly connected, so that the disassembly and replacement of the sealing ring are facilitated, and the bosses on both sides of the first half ring and the second half ring are pressed against the annular chamber and tightly abutted against the annular chamber under an external force, so as to play a sealing role, thereby improving the sealing performance of the sealing ring.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite sealing rings, in particular to a mechanical sealing structure for graphite sealing rings. Background Art

[0002] Graphite sealing ring is an annular seal made of graphite as the main material. It has good high temperature resistance and self-lubrication. Due to its unique physical and chemical properties, graphite sealing rings are widely used in fields that require high-performance sealing solutions. A mechanical seal structure for graphite sealing rings Graphite sealing rings play a key role in mechanical seal structures. Their material selection and design features directly affect the performance of the entire sealing system.

[0003] To this end, the patent with publication number CN217898772U discloses a mechanical seal structure for a graphite sealing ring, wherein the graphite sealing ring comprises a sealing ring body, wherein the sealing ring body comprises a coaxial and fixedly connected graphite ring and a wear-resistant sleeve, wherein a groove and a sealing ring arranged in the groove are arranged in the wear-resistant sleeve, and a positioning pin is arranged at one end of the wear-resistant sleeve away from the graphite ring. The stainless steel carrier and the carbon graphite are combined into one, and the graphite sealing ring structure is designed by utilizing the respective characteristics of the stainless steel carrier and the carbon graphite to make up for the shortcomings of insufficient toughness of graphite; carbon graphite and stainless steel surfaces are used as sealing surfaces, and carbon graphite has good sealing properties as a conventional consumable part, and stainless steel surfaces are used as reference surfaces, and graphite grains with small sealing properties are used as sealing media. Stainless steel has high hardness and slow wear, which effectively improves the overall performance;

[0004] The above-mentioned graphite sealing ring and mechanical sealing structure are not convenient for timely and rapid replacement of the sealing ring during use, and are difficult to disassemble. The graphite sealing ring will easily wear out after being used for too long, resulting in a weakened sealing effect, so the sealing ring needs to be replaced in time. Utility Model Content

[0005] The utility model aims to provide a mechanical sealing structure for a graphite sealing ring, so as to solve the defect that the existing graphite sealing ring and the mechanical sealing structure are inconvenient to disassemble.

[0006] In order to solve the above technical problems, the utility model provides the following technical solutions: a mechanical sealing structure for a graphite sealing ring, comprising a core tube and a sealing structure;

[0007] The core tube comprises a first flange, a first sealing sleeve, a second flange, a second sealing sleeve, fixing bolts, an annular chamber, a sealing structure and a reinforcement structure, wherein the first flange is arranged on one side of the outer side of the core tube, a first sealing sleeve is fixed on one side of the first flange on the outer side of the core tube, and the second flange is arranged on the other side of the outer side of the core tube;

[0008] A second sealing sleeve is fixed to a side of the second flange outside the core tube close to the first sealing sleeve, fixing bolts are evenly arranged inside the first flange and the second flange, and an annular chamber is arranged on one side inside the first sealing sleeve and the second sealing sleeve;

[0009] A sealing structure is arranged inside the annular chamber, and a reinforcing structure is arranged inside the sealing structure.

[0010] Preferably, one side of the first sealing sleeve is in conflict with one side of the second sealing sleeve, and a plurality of groups of fixing bolts are provided, and the fixing bolts are distributed at equal intervals inside the first flange and the second flange.

[0011] Preferably, the sealing structure includes a first half ring, a fixed groove, a second half ring, a connecting block, a slide groove, a spring, a slider, a block, a slot and a boss, the first half ring is arranged inside the annular chamber, fixed grooves are arranged on both sides inside the first half ring, the second half ring is arranged on one side of the first half ring, a connecting block is fixed on one side of the second half ring inside the fixed groove, a slide groove is arranged on one side of the fixed groove, a spring is arranged inside the slide groove, a slider is fixed on one end of the spring, a block is fixed on one side of the slider, a slot is arranged on the side of the connecting block close to the block, and bosses are fixed on both ends of the first half ring and the second half ring.

[0012] Preferably, the first half ring and the second half ring are arranged in a semicircular ring shape, two groups of connecting blocks are arranged, the connecting blocks are symmetrically distributed on one side of the second half ring, and the fixing groove and the connecting block form a snap-fit ​​structure.

[0013] Preferably, the block and the slider form a telescopic structure through a spring, the block and the slot form a locking structure, and two groups of bosses are provided. The bosses are symmetrically distributed at both ends of the first half ring and the second half ring, and the inner diameter of the bosses is equal to the inner diameter of the first half ring and the second half ring.

[0014] Preferably, the reinforcement structure includes a sealing cavity, a sealing airbag, an air pipe and an air nozzle, the sealing cavity is arranged on the outer side of the second half ring on one side of the fixing groove, a sealing airbag is arranged inside the sealing cavity, an air pipe is fixed on one side of the sealing airbag, and an air nozzle is arranged on one side of the air pipe.

[0015] Preferably, the interior of the air tube is connected to the interior of the sealing airbag, and one end of the air tube passes through the interior of the first sealing sleeve, extends to the outside of the first sealing sleeve and is fixedly connected to one end of the air nozzle.

[0016] The utility model provides a mechanical seal structure for a graphite sealing ring, which has the advantages of:

[0017] By providing a sealing structure, by inserting the connecting block on the second half ring into the interior of the fixing groove on the first half ring, the second half ring abuts against the clamping block during the insertion process, so that the abutting force pushes the clamping block to drive the slider to slide inside the sliding groove, so that the spring is compressed. When the clamping block is fixed into the interior of the clamping groove, the first half ring and the second half ring are fixedly connected, which is convenient for disassembly and replacement of the sealing ring. Under the external force, the bosses on both sides of the first half ring and the second half ring are pressed toward the annular chamber and tightly abutted against the annular chamber to play a sealing role, thereby improving the sealing performance of the sealing ring;

[0018] By providing a reinforcing structure and a sealing airbag, the air nozzle is pinched so that the gas in the air nozzle enters the interior of the sealing airbag through the trachea, thereby inflating the sealing airbag, filling the gap between the first half ring, the second half ring and the annular chamber, thereby achieving the purpose of sealing and further enhancing the sealing effect of the sealing ring. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 It is a three-dimensional structural schematic diagram of the utility model;

[0020] Figure 2 It is a schematic diagram of a top view cross-sectional structure of the sealing structure of the utility model;

[0021] Figure 3 This is a schematic diagram of the front cross-sectional structure of the sealing structure of the utility model;

[0022] Figure 4 It is a front view cross-sectional structural schematic diagram of the utility model;

[0023] Figure 5 For the utility model Figure 4 Enlarged structural diagram at A in the middle.

[0024] Explanation of the reference numerals in the figure: 1. core tube; 101. first flange; 102. first sealing sleeve; 103. second flange; 104. second sealing sleeve; 105. fixing bolt; 106. annular chamber; 107. sealing structure; 1071. first half ring; 1072. fixing groove; 1073. second half ring; 1074. connecting block; 1075. slide groove; 1076. spring; 1077. slider; 1078. block; 1079. groove; 1070. boss; 108. reinforcement structure; 1081. sealing chamber; 1082. sealing airbag; 1083. air pipe; 1084. air nozzle. DETAILED DESCRIPTION

[0025] 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.

[0026] See also Figure 1-5 The utility model provides a mechanical sealing structure for a graphite sealing ring, comprising a core tube 1 and a sealing structure 107.

[0027] Reference Figure 1-Figure 3As shown, the core tube 1 includes a first flange 101, a first sealing sleeve 102, a second flange 103, a second sealing sleeve 104, a fixing bolt 105, an annular chamber 106, a sealing structure 107 and a reinforcing structure 108. The first flange 101 is arranged on one side of the outer side of the core tube 1, the first sealing sleeve 102 is fixed to one side of the first flange 101 on the outer side of the core tube 1, the second flange 103 is arranged on the other side of the outer side of the core tube 1, the second sealing sleeve 104 is fixed to one side of the second flange 103 on the outer side of the core tube 1 close to the first sealing sleeve 102, one side of the first sealing sleeve 102 conflicts with one side of the second sealing sleeve 104, and the first flange 101 and the second flange 102 are arranged on the outer side of the core tube 1. 03 is evenly provided with fixing bolts 105, and the fixing bolts 105 are provided with several groups. The fixing bolts 105 are evenly distributed inside the first flange 101 and the second flange 103. An annular chamber 106 is provided on one side of the first sealing sleeve 102 and the second sealing sleeve 104. A sealing structure 107 is provided inside the annular chamber 106. The sealing structure 107 includes a first half ring 1071, a fixing groove 1072, a second half ring 1073, a connecting block 1074, a sliding groove 1075, a spring 1076, a sliding block 1077, a clamping block 1078, a clamping groove 1079 and a boss 1070. The first half ring 1071 is provided on the annular Inside the shaped chamber 106, fixing grooves 1072 are provided on both sides of the first half ring 1071, a second half ring 1073 is provided on one side of the first half ring 1071, a connecting block 1074 is fixed on one side of the second half ring 1073 inside the fixing groove 1072, a sliding groove 1075 is provided on one side of the fixing groove 1072, a spring 1076 is provided inside the sliding groove 1075, a slider 1077 is fixed on one end of the spring 1076, a clamping block 1078 is fixed on one side of the slider 1077, a clamping groove 1079 is provided on one side of the connecting block 1074 near the clamping block 1078, and convex grooves are fixed on both ends of the first half ring 1071 and the second half ring 1073. Platform 1070, the first half ring 1071 and the second half ring 1073 are arranged in a semicircular shape, two groups of connecting blocks 1074 are arranged, and the connecting blocks 1074 are symmetrically distributed on one side of the second half ring 1073, the fixing groove 1072 and the connecting block 1074 form a clamping structure, the clamping block 1078 and the slider 1077 form a telescopic structure through the spring 1076, the clamping block 1078 and the clamping groove 1079 form a clamping structure, and the boss 1070 is provided in two groups, and the boss 1070 is symmetrically distributed at both ends of the first half ring 1071 and the second half ring 1073, and the inner diameter of the boss 1070 is equal to the inner diameter of the first half ring 1071 and the second half ring 1073.

[0028] By inserting the connecting block 1074 on the second half ring 1073 into the fixing groove 1072 on the first half ring 1071, the second half ring 1073 abuts against the block 1078 during the insertion process, so that the abutting force pushes the block 1078 to drive the slider 1077 to slide inside the slide groove 1075, so that the spring 1076 is compressed. When the block 1078 is fixed into the inside of the groove 1079, the first half ring 1071 and the second half ring 1073 are fixedly connected, which is convenient for the disassembly and replacement of the sealing ring. Under the external force, the bosses 1070 on both sides of the first half ring 1071 and the second half ring 1073 are pressed toward the annular chamber 106 and tightly abut against the annular chamber 106 to play a sealing role, thereby improving the sealing performance of the sealing ring.

[0029] Reference Figure 3-Figure 5 As shown, a reinforcing structure 108 is arranged inside the sealing structure 107, and the reinforcing structure 108 includes a sealing cavity 1081, a sealing airbag 1082, an air pipe 1083 and an air nozzle 1084. The sealing cavity 1081 is arranged on the outer side of the second half ring 1073 on one side of the fixing groove 1072, and the sealing cavity 1081 is provided with a sealing airbag 1082. An air pipe 1083 is fixed on one side of the sealing airbag 1082, and an air nozzle 1084 is arranged on one side of the air pipe 1083. The interior of the air pipe 1083 is connected with the interior of the sealing airbag 1082, and one end of the air pipe 1083 passes through the interior of the first sealing sleeve 102 and extends to the outside of the first sealing sleeve 102 and is fixedly connected to one end of the air nozzle 1084.

[0030] By setting up the sealing airbag 1082 and pinching the air nozzle 1084, the gas in the air nozzle 1084 enters the interior of the sealing airbag 1082 through the air tube 1083, and then the sealing airbag 1082 is inflated to fill the gap between the first half ring 1071, the second half ring 1073 and the annular chamber 106, thereby achieving the purpose of sealing and further enhancing the sealing effect of the sealing ring.

[0031] Although the present invention has been described in detail with reference to the aforementioned embodiments, those skilled in the art may still modify the technical solutions described in the aforementioned embodiments, or make equivalent substitutions for some of the technical features therein. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention shall be included in the protection scope of the present invention.

Claims

1. A mechanical sealing structure for a graphite sealing ring, comprising a core tube (1) and a sealing structure (107); Features: The core tube (1) comprises a first flange (101), a first sealing sleeve (102), a second flange (103), a second sealing sleeve (104), a fixing bolt (105), an annular chamber (106), a sealing structure (107) and a reinforcing structure (108); the first flange (101) is arranged on one side of the outer side of the core tube (1); the first sealing sleeve (102) is fixed on one side of the first flange (101) on the outer side of the core tube (1); and the second flange (103) is arranged on the other side of the outer side of the core tube (1); A second sealing sleeve (104) is fixed to a side of the second flange (103) outside the core tube (1) close to the first sealing sleeve (102); fixing bolts (105) are evenly arranged inside the first flange (101) and the second flange (103); and an annular chamber (106) is arranged on one side inside the first sealing sleeve (102) and the second sealing sleeve (104); A sealing structure (107) is disposed inside the annular chamber (106), and a reinforcing structure (108) is disposed inside the sealing structure (107).

2. A mechanical seal structure for a graphite sealing ring according to claim 1, characterized in that: One side of the first sealing sleeve (102) is in conflict with one side of the second sealing sleeve (104), and a plurality of groups of fixing bolts (105) are provided. The fixing bolts (105) are evenly spaced inside the first flange (101) and the second flange (103).

3. The mechanical seal structure for a graphite sealing ring according to claim 1, characterized in that: The sealing structure (107) comprises a first half ring (1071), a fixing groove (1072), a second half ring (1073), a connecting block (1074), a sliding groove (1075), a spring (1076), a sliding block (1077), a clamping block (1078), a clamping groove (1079) and a boss (1070), wherein the first half ring (1071) is arranged inside the annular chamber (106), the fixing grooves (1072) are arranged on both sides inside the first half ring (1071), the second half ring (1073) is arranged on one side of the first half ring (1071), and the fixing grooves (1072) are arranged on both sides inside the first half ring (1071). 2) A connecting block (1074) is fixed on one side of the second inner half ring (1073), a sliding groove (1075) is provided on one side of the fixing groove (1072), a spring (1076) is provided inside the sliding groove (1075), a slider (1077) is fixed on one end of the spring (1076), a clamping block (1078) is fixed on one side of the slider (1077), a clamping groove (1079) is provided on one side of the connecting block (1074) close to the clamping block (1078), and bosses (1070) are fixed on both ends of the first half ring (1071) and the second half ring (1073).

4. A mechanical seal structure for a graphite seal ring according to claim 3, characterized in that: The first half ring (1071) and the second half ring (1073) are arranged in a semicircular shape, and two groups of connecting blocks (1074) are arranged. The connecting blocks (1074) are symmetrically distributed on one side of the second half ring (1073), and the fixing groove (1072) and the connecting blocks (1074) form a snap-fit ​​structure.

5. The mechanical seal structure for a graphite seal ring according to claim 3, characterized in that: The clamping block (1078) and the sliding block (1077) form a telescopic structure through a spring (1076), and the clamping block (1078) and the clamping groove (1079) form a locking structure. The boss (1070) is provided in two groups, and the boss (1070) is symmetrically distributed at both ends of the first half ring (1071) and the second half ring (1073). The inner diameter of the boss (1070) is equal to the inner diameter of the first half ring (1071) and the second half ring (1073).

6. The mechanical seal structure for a graphite seal ring according to claim 1, characterized in that: The reinforcing structure (108) comprises a sealing cavity (1081), a sealing airbag (1082), an air pipe (1083) and an air nozzle (1084); the sealing cavity (1081) is arranged on the outer side of the second half ring (1073) on one side of the fixing groove (1072); a sealing airbag (1082) is arranged inside the sealing cavity (1081); an air pipe (1083) is fixed on one side of the sealing airbag (1082); and an air nozzle (1084) is arranged on one side of the air pipe (1083).

7. A mechanical seal structure for a graphite seal ring according to claim 6, characterized in that: The interior of the air pipe (1083) is connected to the interior of the sealing airbag (1082), and one end of the air pipe (1083) passes through the interior of the first sealing sleeve (102) and extends to the outside of the first sealing sleeve (102) and is fixedly connected to one end of the air nozzle (1084).

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