Graphite block structure

Abstract

The utility model discloses a graphite block structure, which relates to the technical field of graphite block application and comprises an upper sealing ring, a lower sealing ring and an upper connecting cylinder, the upper sealing ring and the lower sealing ring are arranged to be annular graphite blocks, the lower end of the upper connecting cylinder is in threaded connection with a lower connecting cylinder, and the upper sealing ring is installed at the lower end inside the upper connecting cylinder in a sliding mode. An elastic piece used for applying downward elastic force to the upper sealing ring is installed in the upper connecting cylinder, the lower sealing ring is rotatably installed at the upper end of the lower connecting cylinder, after the upper connecting cylinder is in threaded connection with the lower connecting cylinder, the upper sealing ring is attached to the lower sealing ring in a sealed mode, and sealing connection between the upper connecting cylinder and the lower connecting cylinder is completed; the relative position of the upper sealing ring and the lower sealing ring is kept still, friction is prevented from being generated on the contact face of the upper sealing ring and the lower sealing ring, and the problems that when two pipelines are rotationally connected through threads, graphite rings in the pipelines on the two sides make contact friction, and the sealing effect is poor are solved. And two graphite blocks which are in friction with each other are abraded due to contact friction.

Description

Technical Field

[0001] The utility model relates to the technical field of graphite block applications, in particular to a graphite block structure. Background Art

[0002] Graphite blocks are bulk materials made from graphite, a non-metallic mineral composed of carbon arranged in layers. Graphite blocks are typically produced by pressing graphite powder into a compact shape under high temperature and pressure, followed by sintering. This process increases the density and strength of the graphite, creating a solid block material. The shape, purity, density, and particle size of the graphite blocks can be tailored to suit specific application requirements. Graphite's characteristics include good electrical conductivity, high thermal conductivity, high temperature resistance, high corrosion resistance, and self-lubrication. It is widely used in a variety of fields, including power electronics, metallurgy, chemical engineering, machinery, and thermal management.

[0003] Graphite blocks can be used to make graphite seals. See patent publication number CN109578588B for a graphite sealing ring and its preparation method. Graphite seals are resistant to high temperatures, corrosion, and wear, making them suitable for sealing various industrial equipment. They are particularly useful in connecting pipelines, specifically when connecting two pipes that carry high-temperature gases or liquids. When the internal temperature of the pipeline is between -60°C and 250°C, rubber sealing rings can be used. However, when the internal temperature exceeds this range, between -200°C and 800°C, graphite blocks can be used.

[0004] Most existing pipe connections use threaded connections. When two pipes are connected by threaded rotation, the graphite rings in both pipes will contact and rub. Although the graphite blocks are self-lubricating, the two rubbing graphite blocks will still wear due to contact friction. Wear on the contact surface will create gaps, which can easily allow air or liquid to pass through the gaps, thus reducing the sealing performance. To solve the above-mentioned problems, a graphite block structure is now provided. Utility Model Content

[0005] The purpose of the present utility model is to provide a graphite block structure to solve the problem proposed in the above background technology that most existing pipeline connections use threaded connections. When two pipelines are connected by rotating the threads, the graphite rings in the pipelines on both sides will contact and rub, and the two graphite blocks rubbing against each other will wear due to the contact friction.

[0006] To achieve the above object, the present invention provides the following technical solutions: a graphite block structure, comprising an upper sealing ring and a lower sealing ring, both of which are configured as annular graphite blocks;

[0007] An upper connecting tube, the lower end of which is threadedly connected to a lower connecting tube, an upper sealing ring being slidably mounted on the lower end of the inner portion of the upper connecting tube, an elastic member for applying downward elastic force to the upper sealing ring being mounted in the upper connecting tube, and a lower sealing ring being rotatably mounted on the upper end of the lower connecting tube;

[0008] After the upper connecting tube is threadedly connected to the lower connecting tube, the upper sealing ring is sealed against the lower sealing ring to complete the sealed connection between the upper connecting tube and the lower connecting tube.

[0009] As a preferred technical solution of the present invention, a thread groove is provided at the lower end of the upper connecting tube, and a thread matching the thread groove is provided at the outer side wall of the upper end of the lower connecting tube.

[0010] As a preferred technical solution of the present invention, a sliding groove for installing the upper sealing ring is opened in the threaded groove of the upper connecting tube, and a rotating groove for installing the lower sealing ring is opened at the upper end of the lower connecting tube.

[0011] As a preferred technical solution of the present invention, a positioning block for positioning is fixedly connected to the lower end of the upper sealing ring, and a positioning groove matching the positioning block is formed at the upper end of the lower sealing ring.

[0012] As a preferred technical solution of the present invention, a limit rod is fixedly connected to the upper end of the upper sealing ring to prevent the upper sealing ring from rotating, and a sliding hole matching the limit rod is provided in the sliding groove.

[0013] As a preferred technical solution of the present invention, the elastic member is configured as a spring, and the spring is sleeved on the outer side wall of the limiting rod.

[0014] As a preferred technical solution of the present invention, a roller is rotatably installed in the rotating groove to facilitate the rotation of the lower sealing ring, and the roller is supported at the lower end of the lower sealing ring.

[0015] Compared with the prior art, the beneficial effects of the present invention are:

[0016] The utility model solves the problem that most of the existing pipeline connections adopt threaded connection, and when two pipelines are connected by rotating threads, the graphite rings in the pipelines on both sides will come into contact and rub, and the two graphite blocks rubbing against each other will be worn due to the contact friction. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is a schematic diagram of the connection structure of the upper connecting tube and the lower connecting tube in an embodiment of the present utility model;

[0018] Figure 2This is a cross-sectional view of the upper connecting tube and the lower connecting tube of an embodiment of the present utility model;

[0019] Figure 3 This is a schematic structural diagram of the upper connecting tube according to an embodiment of the present utility model;

[0020] Figure 4 This is an exploded view of the upper connecting tube and the upper sealing ring of an embodiment of the present utility model;

[0021] Figure 5 This is a schematic structural diagram of the lower connecting tube according to an embodiment of the present utility model;

[0022] Figure 6 This is an exploded view of the lower connecting tube and the lower sealing ring of an embodiment of the present utility model.

[0023] In the figure: 1, upper sealing ring; 11, limiting rod; 12, positioning block; 2, lower sealing ring; 3, upper connecting tube; 31, elastic member; 4, lower connecting tube; 41, roller. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0025] See also Figure 1-6 This embodiment provides a graphite block structure, including an upper sealing ring 1 and a lower sealing ring 2. The upper sealing ring 1 and the lower sealing ring 2 are both configured as annular graphite blocks, and the upper sealing ring 1 and the lower sealing ring 2 are respectively installed in an upper connecting tube 3 and a lower connecting tube 4. The upper connecting tube 3 and the lower connecting tube 4 are configured as equipment pipelines, and high-temperature gas or liquid can pass through the interior. Figure 2 As shown, the upper outer wall of the lower connecting tube 4 is threaded, and the lower end of the upper connecting tube 3 is provided with a threaded groove that matches the thread of the lower connecting tube 4, thereby threading the upper and lower connecting tubes 3 and 4 together. The upper end of the lower connecting tube 4 is provided with an annular rotation groove, into which the lower sealing ring 2 is rotatably mounted. The threaded hole of the upper connecting tube 3 is provided with a slide groove, into which the upper sealing ring 1 is slidably mounted. After the lower connecting tube 4 is threadedly connected to the lower end of the upper connecting tube 3, the lower sealing ring 2 is sealed against the upper sealing ring 1. The contact between the upper sealing ring 1 and the lower sealing ring 2 seals the connection between the upper and lower connecting tubes 3 and 4.

[0026] like Figure 2 and Figure 4As shown, a plurality of limit rods 11 are fixedly connected to the upper end of the upper sealing ring 1, and the plurality of limit rods 11 are evenly arranged in a circular array. A sliding hole is opened in the slide groove of the upper connecting tube 3, and the limit rods 11 are slidably inserted in the sliding hole. The limit rods 11 prevent the upper sealing ring 1 from rotating in the slide groove of the upper connecting tube 3.

[0027] like Figure 2 As shown, multiple elastic members 31 are further installed in the chute of the upper connecting tube 3. The multiple elastic members 31 are evenly arranged in a circular array. The elastic members 31 are configured as springs. The springs are sleeved on the outer wall of the limiting rod 11. The elastic members 31 apply a downward elastic force to the upper sealing ring 1 to ensure the fit between the upper sealing ring 1 and the lower sealing ring 2. The elastic members 31 are not limited to springs and can also be configured as metal springs, which can also apply a downward elastic force to the upper sealing ring 1.

[0028] After the upper sealing ring 1 and the lower sealing ring 2 are fitted together, the friction between the inner wall of the lower connecting tube 4 and the outer wall of the lower sealing ring 2 is greater than the friction between the upper sealing ring 1 and the lower sealing ring 2. However, the lower sealing ring 2 will still rotate relative to the upper sealing ring 1, that is, the contact surface between the lower sealing ring 2 and the upper sealing ring 1 will produce rotational friction. In order to prevent the lower sealing ring 2 from rotating relative to the upper sealing ring 1, a positioning block 12 is fixedly connected to the lower end of the upper sealing ring 1. Figure 4 As shown, the positioning blocks 12 are provided in a plurality, and the plurality of positioning blocks 12 are evenly distributed in a circular array, as shown in FIG. Figure 6 As shown, a positioning groove is provided at the upper end of the lower sealing ring 2. After the upper sealing ring 1 is attached to the lower sealing ring 2, the positioning block 12 is inserted into the positioning groove of the lower sealing ring 2, thereby preventing rotational friction from occurring on the contact surfaces of the upper sealing ring 1 and the lower sealing ring 2.

[0029] Because the upper sealing ring 1 and the lower sealing ring 2 are both made of graphite blocks, which are self-lubricating, the upper sealing ring 1 can be sealed and mounted within the slide groove of the upper connecting tube 3, sliding up and down within the groove. The lower sealing ring 2 can be sealed and mounted within the rotation groove of the lower connecting tube 4, rotating within the groove. To further enhance the smoothness of the rotation of the lower sealing ring 2, multiple mounting holes are provided within the rotation groove of the lower connecting tube 4, evenly arranged in a circular array. Rollers 41 are rotatably mounted within the mounting holes, with the outer wall of roller 41 contacting and supporting the lower end face of the lower sealing ring 2. As the lower sealing ring 2 rotates within the rotation groove of the lower connecting tube 4, roller 41 rotates within the mounting hole, further enhancing the smoothness of the rotation of the lower sealing ring 2.

[0030] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and variations may be made to these embodiments without departing from the principles and spirit of the present invention, and the scope of the present invention is defined by the appended claims and their equivalents.

Claims

1. A graphite block structure, characterized in that: include: An upper sealing ring (1) and a lower sealing ring (2), wherein the upper sealing ring (1) and the lower sealing ring (2) are both configured as annular graphite blocks; An upper connecting tube (3), the lower end of which is threadedly connected to a lower connecting tube (4), the upper sealing ring (1) is slidably mounted on the lower end of the interior of the upper connecting tube (3), an elastic member (31) for applying a downward elastic force to the upper sealing ring (1) is mounted in the upper connecting tube (3), and the lower sealing ring (2) is rotatably mounted on the upper end of the lower connecting tube (4); After the upper connecting tube (3) is threadedly connected to the lower connecting tube (4), the upper sealing ring (1) is sealed against the lower sealing ring (2), completing the sealed connection between the upper connecting tube (3) and the lower connecting tube (4).

2. A graphite block structure according to claim 1, characterized in that: A thread groove is provided at the lower end of the upper connecting tube (3), and a thread matching the thread groove is provided on the outer side wall of the upper end of the lower connecting tube (4).

3. A graphite block structure according to claim 2, characterized in that: A sliding groove for installing the upper sealing ring (1) is provided in the threaded groove of the upper connecting tube (3), and a rotating groove for installing the lower sealing ring (2) is provided at the upper end of the lower connecting tube (4).

4. A graphite block structure according to claim 3, characterized in that: The lower end of the upper sealing ring (1) is fixedly connected to a positioning block (12) for positioning, and the upper end of the lower sealing ring (2) is provided with a positioning groove matching the positioning block (12).

5. A graphite block structure according to claim 4, characterized in that: The upper end of the upper sealing ring (1) is fixedly connected with a limiting rod (11) for preventing the upper sealing ring (1) from rotating, and a sliding hole matching the limiting rod (11) is provided in the sliding groove.

6. The graphite block structure according to claim 1, characterized in that: The elastic member (31) is configured as a spring, and the spring is sleeved on the outer side wall of the limiting rod (11).

7. The graphite block structure according to claim 4, characterized in that: A roller (41) is rotatably installed in the rotating groove to facilitate the rotation of the lower sealing ring (2), and the roller (41) is supported on the lower end of the lower sealing ring (2).

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