Pulverized coal pipeline compensator

Abstract

The present invention discloses a pulverized coal pipeline compensator, comprising: a first tube body, the end of each of which has a spherical structure; a second tube body, the end of each of which has a spherical structure, the spherical structure of the second tube body closely fits the spherical structure of the first tube body and can rotate relative to it; a third tube body, which is sleeved on the second tube body and can move relative to the second tube body in the axial direction, the end of one end of the third tube body having a spherical structure; a fourth tube body, the end of each of which has a spherical structure, the spherical structure of the fourth tube body closely fits the spherical structure of the third tube body and can rotate relative to it; and multiple locking structures, one end of the first tube body and one end of the second tube body, as well as one end of the third tube body and one end of the fourth tube body, are respectively provided with multiple locking structures for connecting and locking the two. The present invention can compensate for axial, angular, lateral and combined displacement in various directions, and has extremely strong wear resistance.

Description

Technical Field

[0001] The present invention relates to the field of pipeline compensation, and more particularly to a pulverized coal pipeline compensator. Background Art

[0002] Due to seasonal replacement, pulverized coal pipelines experience thermal expansion and contraction, the medium they transport is above ambient temperature, and their length varies. When temperatures are too high or the pipeline is too long, these factors can cause the pipeline to fail beyond its inherent stress, potentially damaging connected equipment and supports. To reduce thermal stress, compensators are typically installed in pulverized coal pipelines. However, existing pulverized coal pipeline compensators use bellows, which, combined with high-speed friction from the pulverized coal and poorly designed components, can easily cause premature failure. Summary of the Invention

[0003] The purpose of the present invention is to provide a pulverized coal pipeline compensator, which fundamentally solves the damage to the pipeline compensator caused by factors such as high-speed friction of pulverized coal, thermal expansion and contraction, and installation deviation. It is resistant to high temperatures, does not leak powder, does not accumulate powder, has low displacement stiffness, can absorb displacement of the pipeline in any direction, and can effectively ensure the normal operation of equipment, brackets and pipeline systems.

[0004] To achieve these objects and other advantages of the present invention, a pulverized coal pipeline compensator is provided, comprising:

[0005] The first tube body has a spherical surface at one end thereof;

[0006] The second tube body has a spherical structure at one end thereof, and the spherical structure of the second tube body is tightly fitted with the spherical structure of the first tube body and can rotate relative to each other;

[0007] a third tube body, which is sleeved on the second tube body and can move relative to the second tube body along the axial direction, and a terminal end of one end of the third tube body has a spherical structure;

[0008] The fourth tube body has a spherical structure at one end thereof, and the spherical structure of the fourth tube body is tightly fitted with the spherical structure of the third tube body and can rotate relative to each other;

[0009] Multiple locking structures, one end of the first tube body and one end of the second tube body, as well as one end of the third tube body and one end of the fourth tube body are respectively provided with multiple locking structures for connecting and locking the two;

[0010] The locking structure comprises:

[0011] a connecting member, one end of which is hinged to one end of the second tube body or one end of the third tube body, and the other end of which faces the first tube body or the fourth tube body;

[0012] a connecting shaft fixed to the other end of the connecting member;

[0013] Two arms, one end of which is staggered and the other end of which faces the first tube body or the fourth tube body, and each of which is provided with a through hole, and the connecting shaft passes through one end of the two arms;

[0014] A pair of positioning pins are spaced apart and arranged on the first tube body or the fourth tube body except for the spherical structure thereon, and the pair of positioning pins respectively pass through two through holes, and the size of the two through holes is respectively larger than the size of the corresponding positioning pins;

[0015] The elastic member is arranged between the other ends of the two arms, and the elastic member presses on the first tube body or the fourth tube body.

[0016] Preferably, in the pulverized coal pipeline compensator, the other part of one end of the third tube body except the terminal end thereof is gap-fitted with the other end of the second tube body, and the space between the inner side wall of the other end of the third tube body and the outer side wall of the second tube body is filled with graphite;

[0017] The pulverized coal pipeline compensator also includes:

[0018] A pressure cover is sleeved on the second tube body, one end of the pressure cover is inserted between the inner wall of the other end of the third tube body and the outer wall of the second tube body, and the other end is fixedly connected to the other end of the third tube body. The whole composed of the pressure cover and the third tube body can move relative to the second tube body in the axial direction, and graphite seals the area surrounded by one end of the pressure cover, the second tube body and the third tube body.

[0019] Preferably, in the pulverized coal pipeline compensator, the other end of the gland and the other end of the third tube body are respectively provided with a first flange and a second flange, and the other end of the gland and the other end of the third tube body are connected through the first flange and the second flange.

[0020] Preferably, in the pulverized coal pipeline compensator, the other end of the first pipe body and the other end of the fourth pipe body are respectively provided with a third flange and a fourth flange.

[0021] Preferably, in the pulverized coal pipeline compensator, the elastic member is a spring;

[0022] The locking structure further includes:

[0023] A pair of connecting rods are located between the other ends of the two arms, one end of the pair of connecting rods is respectively connected to the other ends of the two arms, and the other ends are arranged opposite to each other, and the spring is sleeved on the pair of connecting rods.

[0024] Preferably, in the pulverized coal pipeline compensator, the pair of connecting rods are respectively provided with external threads, and one end of the pair of connecting rods is respectively provided with a nut, and the two nuts are respectively threadedly connected to the corresponding connecting rods.

[0025] Preferably, in the pulverized coal pipeline compensator, a pair of first lugs and a pair of second lugs are provided at one end and the other end of each connecting piece, respectively, the first lugs on each connecting piece are perpendicular to the second lugs, and both ends of each connecting shaft are connected to the corresponding pair of second lugs, respectively, and each connecting shaft is perpendicular to the corresponding second lug.

[0026] The locking structure further includes:

[0027] A fixed seat is fixed on one end of the second tube body or one end of the third tube body and is located between a pair of first ear plates. The fixed seat and the corresponding pair of first ear plates are connected by a rotating shaft, so that one end of the connecting piece is hinged to one end of the second tube body or one end of the third tube body, and the rotating shaft is perpendicular to the first ear plates.

[0028] Preferably, in the pulverized coal pipeline compensator, the first tube body and the fourth tube body, except for the spherical structure thereon, are cylindrical in shape; multiple pairs of positioning pins on the first tube body or the fourth tube body are evenly spaced along the circumferential direction of the other end of the first tube body or the fourth tube body, and are close to the spherical structure of the first tube body or the fourth tube body; one end and the other end of the second tube body are cylindrical in shape, and the outer diameter of one end of the second tube body is larger than the outer diameter of the other end; the spherical structure of the second tube body is located on the inner wall of one end of the second tube body; multiple fixing seats on the second tube body are spaced along the circumferential direction of one end of the second tube body, and are close to the spherical structure of the second tube body; the other parts of one end of the third tube body, except for its end, are The spherical structure of the third tube body is located on the inner wall of one end of the third tube body. The multiple fixing seats on the third tube body are spaced apart along the circumferential direction of one end of the third tube body and are close to the spherical structure of the third tube body. The pressure cover is cylindrical. When the axes of the first tube body, the second tube body, the third tube body and the fourth tube body are in a straight line, the connecting line of the fixing seat and the corresponding pair of positioning pins forms an isosceles triangle. Each connecting axis is parallel to the corresponding pair of positioning pins and has the same spacing as the corresponding pair of positioning pins.

[0029] Preferably, in the pulverized coal pipeline compensator, one end of the first tube body and one end of the second tube body, as well as one end of the third tube body and one end of the fourth tube body are respectively provided with six locking structures for connecting and locking the two.

[0030] The present invention has at least the following beneficial effects:

[0031] The third tube body and the second tube body of the present invention can move relative to each other in the axial direction, so that the second tube body can be stretched and compressed in the axial direction, thereby compensating for the displacement in the axial direction. A graphite filler sealing ring is provided in the gap between the second tube body and the third tube body, and the flange surface on the sealing chamber pressure cover is connected to the flange surface of the third tube body to perform a sealing function to prevent leakage.

[0032] The spherical structure of the first tube body of the present invention can rotate relative to the spherical structure of the second tube body, and the spherical structure of the fourth tube body can rotate equivalently to the spherical structure of the third tube body, thereby compensating for radial displacement.

[0033] The present invention uses a spring between two arms of the locking structure to automatically seal and fit the spherical structures of the first and fourth tubes with the spherical structures of the second and third tubes respectively after the first and fourth tubes are displaced, thereby ensuring the stability of the compensator during use.

[0034] The present invention fundamentally solves the damage to the pipeline compensator caused by factors such as high-speed friction of coal powder, thermal expansion and contraction, and installation deviation. It is resistant to high temperatures, does not leak powder, does not accumulate powder, has low displacement stiffness, can absorb displacement of the pipeline in any direction, and can effectively ensure the normal operation of equipment, brackets and pipeline systems.

[0035] Other advantages, objectives and features of the present invention will be reflected in part from the following description and will be understood by those skilled in the art through study and practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] Figure 1 2. It is a schematic diagram of the three-dimensional structure of a pulverized coal pipeline compensator according to one embodiment of the present invention;

[0037] Figure 2 2 is a schematic diagram of the planar structure of a pulverized coal pipeline compensator according to an embodiment of the present invention;

[0038] Figure 3 is a schematic structural diagram of a first tube body according to an embodiment of the present invention;

[0039] Figure 4 is a schematic structural diagram of a second tube body according to an embodiment of the present invention;

[0040] Figure 5 is a structural schematic diagram of a third tube body according to an embodiment of the present invention;

[0041] Figure 6 is a schematic structural diagram of a gland according to an embodiment of the present invention;

[0042] Figure 7 is a schematic structural diagram of a connecting member, two arms and a spring according to an embodiment of the present invention;

[0043] Figure 8 2 is a schematic structural diagram of a locking structure according to an embodiment of the present invention. DETAILED DESCRIPTION

[0044] The present invention will be described in further detail below in conjunction with the accompanying drawings so that those skilled in the art can implement the invention with reference to the description.

[0045] It should be noted that, in the description of the present invention, the terms "horizontal", "longitudinal", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship, are based on the orientation or position relationship shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description. They do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0046] like Figures 1 to 8 As shown, the present invention provides a pulverized coal pipeline compensator, comprising:

[0047] The first tube 1, one end of which (such as Figure 2 The ends of the right end shown in FIG. 1 and FIG. 2 have a spherical structure;

[0048] The second tube 2, one end of which (such as Figure 2 The end of the second tube body 2 (shown as the left end) has a spherical structure, and the spherical structure of the second tube body 2 fits tightly with the spherical structure of the first tube body 1 and can rotate relative to each other;

[0049] The third tube body 3 is sleeved on the second tube body 2, and the third tube body 3 and the second tube body 2 can move relative to each other along the axial direction. One end of the third tube body 3 (such as Figure 2 The end of the right end shown has a spherical structure;

[0050] The fourth tube 4 has a terminal end (such as Figure 2 The left end shown in the figure) has a spherical structure, and the spherical structure of the fourth tube body 4 fits tightly with the spherical structure of the third tube body 3 and can rotate relative to each other;

[0051] Multiple locking structures 5, one end of the first tube body 1 and one end of the second tube body 2, as well as one end of the third tube body 3 and one end of the fourth tube body 4 are respectively provided with multiple locking structures 5 for connecting and locking the two;

[0052] The locking structure 5 includes:

[0053] a connecting member 51, one end of which is hinged to one end of the second tube body 2 or one end of the third tube body 3 (one end of the connecting member 51 connecting one end of the first tube body 1 and one end of the second tube body 2 is hinged to one end of the second tube body 2, and one end of the connecting member 51 connecting one end of the third tube body 3 and one end of the fourth tube body 4 is hinged to one end of the third tube body 3), and the other end of which faces the first tube body 1 or the fourth tube body 4 (the other end of the connecting member 51 connecting one end of the first tube body 1 and one end of the second tube body 2 faces the first tube body 1, and the other end of the connecting member 51 connecting one end of the third tube body 3 and one end of the fourth tube body 4 faces the fourth tube body 4);

[0054] a connecting shaft 52 fixed to the other end of the connecting member 51;

[0055] Two arms 53, one end of which is staggered and the other end is directed toward the first tube body 1 or the fourth tube body 4, and each is provided with a through hole, and the connecting shaft 52 passes through one end of the two arms 53;

[0056] A pair of positioning pins 54 are arranged at intervals on the first tube body 1 or the fourth tube body 4 except for the spherical structure thereon. The pair of positioning pins 54 pass through two through holes respectively. The size of the two through holes is larger than the size of the corresponding positioning pins 54, so that the positioning pins 54 have room for movement and can also adjust the positioning pins 54 to a certain extent.

[0057] Limiting;

[0058] The elastic member 55 is arranged between the other ends of the two arms 53. The elastic member 55 presses on the first tube body 1 or the fourth tube body 4. When the first tube body 1 or the fourth tube body 4 rotates, the elastic member 55 always presses on the first tube body 1.

[0059] Or on the fourth tube 4.

[0060] The pulverized coal pipeline compensator provided by this solution is such that, when in use, the third tube body 3 and the second tube body 2 can move relative to each other in the axial direction, so that the second tube body 2 can be stretched and compressed in the axial direction, thereby compensating for displacement in the axial direction. The spherical structure of the first tube body 1 can rotate relative to the spherical structure of the second tube body 2, and the spherical structure of the fourth tube body 4 can rotate equivalently to the spherical structure of the third tube body 3, thereby compensating for displacement in the radial direction. The elastic member 55 between the two arms 53 of the locking structure 5 can automatically seal the spherical structures of the first tube body 1 and the fourth tube body 4 with the spherical structures of the second tube body 2 and the third tube body 3, respectively, after the first tube body 1 and the fourth tube body 4 are displaced, thereby ensuring the stability of the compensator during use.

[0061] Specifically, if Figure 8As shown, when the first tube body 1 is lifted upward, the distance between the pair of positioning pins 54 corresponding to the locking structure 5 directly above and the hinge point (hereinafter referred to as the intersection point) between the connecting member 51 and one end of the second tube body 2 becomes smaller. The other end of the connecting member 51 moves to the right relative to the first tube body 1, driving the two arms 53 to rotate. The other ends of the two arms 53 open, and the elastic member 55 stretches outward. At this time, although the force of the elastic member 55 pressing on the first tube body 1 is reduced, it is still large enough to lock the spherical structure of the first tube body 1 with the spherical structure of the second tube body 2. The other locking structures 5 will also automatically adjust according to the movement direction and amount of the positioning pin 54 during the rotation of the first tube body 1. During the adjustment process, if the distance between the positioning pin 54 and the hinge point becomes smaller, the arm 53 corresponding to the positioning pin 54 will open, and vice versa. The amount of movement of the pair of positioning pins 54 relative to the hinge point is not necessarily the same. For example, when the first tube body 1 is lifted upward, the amount of movement of the pair of positioning pins 54 corresponding to the side locking structure 5 relative to the hinge point is different, so the amount of opening or contraction of the corresponding two arms 53 is also different. However, because the other ends of the two arms 53 are provided with elastic members 55, the elastic members 55 can make the two arms 53 open or contract by the same amount.

[0062] The locking structure 5 that connects and locks the spherical structure of the third tube 3 and the spherical structure of the fourth tube 4 also automatically adjusts according to the movement direction and amount of the positioning pin 54 during the rotation of the fourth tube 4. During the adjustment process, if the distance between the positioning pin 54 and the hinge point decreases, the arm 53 corresponding to the positioning pin 54 will open, and vice versa.

[0063] In another embodiment, in the pulverized coal pipeline compensator, the other portion of one end of the third tube body 3, except for its terminal end, is loosely fitted with the other end of the second tube body 2, so that the third tube body 3 and the second tube body 2 can move relative to each other in the axial direction. Graphite 6 is filled between the inner sidewall of the other end of the third tube body 3 and the outer sidewall of the second tube body 2, and a sealing ring is formed by the graphite.

[0064] The pulverized coal pipeline compensator also includes:

[0065] The pressure cap 7 is sleeved on the second tube body 2, one end of the pressure cap 7 is inserted between the inner wall of the other end of the third tube body 3 and the outer wall of the second tube body 2, and the other end is fixedly connected to the other end of the third tube body 3. The whole composed of the pressure cap 7 and the third tube body 3 can move relative to the second tube body 2 in the axial direction, and graphite seals the area surrounded by one end of the pressure cap 7, the second tube body 2 and the third tube body 3.

[0066] A graphite packing sealing ring is provided in the gap between the second tube body 2 and the third tube body 3, and the sealing cavity gland 7 is connected to the third tube body 3 to play a sealing role to prevent leakage.

[0067] In another embodiment, in the pulverized coal pipeline compensator, the other end of the gland 7 and the other end of the third tube body 3 are respectively provided with a first flange 71 and a second flange 31. The other end of the gland 7 and the other end of the third tube body 3 are connected by the first and second flanges. The flange surface on the gland 7 of the sealed chamber is connected to the flange surface of the third tube body 3 to provide a seal and prevent leakage.

[0068] In another embodiment, in the pulverized coal pipeline compensator, the other end of the first pipe body 1 and the other end of the fourth pipe body 4 are respectively provided with a third flange 11 and a fourth flange 41. The third flange and the fourth flange are connected to the pipelines or equipment at both ends of the compensator.

[0069] In another embodiment, in the pulverized coal pipeline compensator, the elastic member 55 is a spring;

[0070] The locking structure 5 further includes:

[0071] A pair of connecting rods are located between the other ends of the two arms 53, one end of the pair of connecting rods is respectively connected to the other ends of the two arms 53, and the other ends are arranged opposite to each other but not fixed together, so that the other ends of the two arms 53 can be opened or contracted respectively, and the spring is sleeved on the pair of connecting rods.

[0072] During the rotation of the first tube 1 or the fourth tube 4, the locking mechanism 5 automatically adjusts based on the direction and amount of movement of the positioning pin 54. During this adjustment, as the distance between the positioning pin 54 and the hinge point decreases, the corresponding arm 53 opens, and vice versa, tightens. Although the force of the spring pressing on the first tube 1 or the fourth tube 4 varies during this adjustment process, the spherical structure of the first tube 1 is locked with the spherical structure of the second tube 2, and the spherical structure of the third tube 3 is locked with the spherical structure of the fourth tube 4.

[0073] In another embodiment, the pair of connecting rods in the pulverized coal pipeline compensator are each provided with an external thread. A nut 58 is provided at one end of each connecting rod. The two nuts 58 are threadedly connected to their respective connecting rods. After a period of use, the spring's elastic force decreases. This can be adjusted by adjusting the two nuts 58 in the direction of spring contraction.

[0074] In another embodiment, in the pulverized coal pipeline compensator, a pair of first lugs 511 and a pair of second lugs 512 are provided at intervals at one end and the other end of each connecting member 51, respectively. The first lugs 511 on each connecting member 51 are perpendicular to the second lugs 512, and both ends of each connecting shaft 52 are connected to the corresponding pair of second lugs 512, respectively. Each connecting shaft 52 is perpendicular to the corresponding second lug 512.

[0075] The locking structure 5 further includes:

[0076] The fixing seat 56 is fixed on one end of the second tube body 2 or one end of the third tube body 3 and is located between the pair of first ear plates 511. The fixing seat 56 and the corresponding pair of first ear plates 511 are connected by a rotating shaft 57, so that one end of the connecting member 51 is hinged to one end of the second tube body 2 or one end of the third tube body 3, and the rotating shaft 57 is perpendicular to the first ear plates 511.

[0077] During the rotation of the first tube 1 or the fourth tube 4, the locking structure 5 automatically adjusts according to the movement direction and amount of the positioning pin 54. During the adjustment process, the distance between the positioning pin 54 and the fixing seat 56 decreases, and the arm 53 corresponding to the positioning pin 54 opens, and vice versa.

[0078] In another embodiment, in the pulverized coal pipeline compensator, the first tube body 1 and the fourth tube body 4 are cylindrical in shape except for the spherical structure thereon, and multiple pairs of positioning pins 54 on the first tube body 1 or the fourth tube body 4 are evenly spaced along the circumferential direction of the other end of the first tube body 1 or the fourth tube body 4, and are close to the spherical structure of the first tube body 1 or the fourth tube body 4. One end and the other end of the second tube body 2 are both cylindrical, and the outer diameter of one end of the second tube body 2 is larger than the outer diameter of the other end. The spherical structure of the second tube body 2 is located on the inner wall of one end of the second tube body 2, and multiple fixing seats 56 on the second tube body 2 are spaced along the circumferential direction of one end of the second tube body 2, and are close to the spherical structure of the second tube body 2. The other part of one end of the third tube body 3 except for its end is cylindrical, and the other end of the third tube body 3 is also cylindrical, and the inner diameter of the other end of the third tube body 3 is larger than the other part of one end of the third tube body 3 except its end. The inner diameter of the third tube body 3 is located on the inner wall of one end of the third tube body 3. The multiple fixing seats 56 on the third tube body 3 are spaced apart along the circumferential direction of one end of the third tube body 3 and close to the spherical structure of the third tube body 3. The pressure cover 7 is cylindrical. When the axes of the first tube body 1, the second tube body 2, the third tube body 3 and the fourth tube body 4 are in a straight line, the connecting line of the fixing seat 56 and the corresponding pair of positioning pins 54 forms an isosceles triangle. Each connecting shaft 52 is parallel to the corresponding pair of positioning pins 54. The pair of positioning pins 54 are symmetrically arranged relative to the corresponding connecting shaft 52 and are slightly closer to the elastic member 55 than the corresponding connecting shaft 52. That is, with the direction of the elastic member 55 as the front, the pair of positioning pins 54 are slightly forward compared to the corresponding connecting shaft 52. During the rotation of the first tube body 1 or the fourth tube body 4, the pair of positioning pins 54 will be slightly backward compared to the corresponding connecting shaft 52 or the three are in a straight line.

[0079] In another embodiment, in the pulverized coal pipeline compensator, one end of the first tube body 1 and one end of the second tube body 2, as well as one end of the third tube body 3 and one end of the fourth tube body 4 are respectively provided with six locking structures 5 for connecting and locking the two.

[0080] Although the embodiments of the present invention have been disclosed above, they are not limited to the applications listed in the description and implementation methods. They can be fully applied to various fields suitable for the present invention. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the present invention is not limited to the specific details and illustrations shown and described herein.

Claims

1. Pulverized coal pipeline compensator, characterized in that: include: The first tube body has a spherical surface at one end thereof; The second tube body has a spherical structure at one end thereof, and the spherical structure of the second tube body is tightly fitted with the spherical structure of the first tube body and can rotate relative to each other; a third tube body, which is sleeved on the second tube body and can move relative to the second tube body along the axial direction, and a terminal end of one end of the third tube body has a spherical structure; The fourth tube body has a spherical structure at one end thereof, and the spherical structure of the fourth tube body is tightly fitted with the spherical structure of the third tube body and can rotate relative to each other; Multiple locking structures, one end of the first tube body and one end of the second tube body, as well as one end of the third tube body and one end of the fourth tube body are respectively provided with multiple locking structures for connecting and locking the two; The locking structure comprises: a connecting member, one end of which is hinged to one end of the second tube body or one end of the third tube body, and the other end of which faces the first tube body or the fourth tube body; a connecting shaft fixed to the other end of the connecting member; Two arms, one end of which is staggered and the other end of which faces the first tube body or the fourth tube body, and each of which is provided with a through hole, and the connecting shaft passes through one end of the two arms; A pair of positioning pins are spaced apart and arranged on the first tube body or the fourth tube body except for the spherical structure thereon, and the pair of positioning pins respectively pass through two through holes, and the size of the two through holes is respectively larger than the size of the corresponding positioning pins; The elastic member is arranged between the other ends of the two arms, and the elastic member presses on the first tube body or the fourth tube body.

2. The pulverized coal pipeline compensator according to claim 1, characterized in that: The other part of one end of the third tube body except the end thereof is loosely fitted with the other end of the second tube body, and graphite is filled between the inner side wall of the other end of the third tube body and the outer side wall of the second tube body; The pulverized coal pipeline compensator also includes: A pressure cover is sleeved on the second tube body, one end of the pressure cover is inserted between the inner wall of the other end of the third tube body and the outer wall of the second tube body, and the other end is fixedly connected to the other end of the third tube body. The whole composed of the pressure cover and the third tube body can move relative to the second tube body in the axial direction, and graphite seals the area surrounded by one end of the pressure cover, the second tube body and the third tube body.

3. The pulverized coal pipeline compensator according to claim 2, characterized in that: The other end of the gland and the other end of the third tube body are respectively provided with a first flange and a second flange, and the other end of the gland and the other end of the third tube body are connected through the first flange and the second flange.

4. The pulverized coal pipeline compensator according to claim 1, characterized in that: The other end of the first tube body and the other end of the fourth tube body are respectively provided with a third flange and a fourth flange.

5. The pulverized coal pipeline compensator according to claim 2, characterized in that: The elastic member is a spring; The locking structure further includes: A pair of connecting rods are located between the other ends of the two arms, one end of the pair of connecting rods is respectively connected to the other ends of the two arms, and the other ends are arranged opposite to each other, and the spring is sleeved on the pair of connecting rods.

6. The pulverized coal pipeline compensator according to claim 5, characterized in that: The pair of connecting rods are respectively provided with external threads, and one end of the pair of connecting rods is respectively provided with a nut, and the two nuts are respectively threadedly connected to the corresponding connecting rods.

7. The pulverized coal pipeline compensator according to claim 5, characterized in that: A pair of first lugs and a pair of second lugs are provided at one end and the other end of each connecting member, respectively. The first lugs on each connecting member are perpendicular to the second lugs. Both ends of each connecting shaft are connected to the corresponding pair of second lugs, respectively. Each connecting shaft is perpendicular to the corresponding second lug. The locking structure further includes: A fixed seat is fixed on one end of the second tube body or one end of the third tube body and is located between a pair of first ear plates. The fixed seat and the corresponding pair of first ear plates are connected by a rotating shaft, so that one end of the connecting piece is hinged to one end of the second tube body or one end of the third tube body, and the rotating shaft is perpendicular to the first ear plates.

8. The pulverized coal pipeline compensator according to claim 7, characterized in that: The first tube body and the fourth tube body are cylindrical in shape except for the spherical structure thereon. The multiple pairs of positioning pins on the first tube body or the fourth tube body are evenly spaced along the circumferential direction of the other end of the first tube body or the fourth tube body, and are close to the spherical structure of the first tube body or the fourth tube body. One end and the other end of the second tube body are cylindrical, and the outer diameter of one end of the second tube body is larger than the outer diameter of the other end. The spherical structure of the second tube body is located on the inner wall of one end of the second tube body. The multiple fixing seats on the second tube body are spaced along the circumferential direction of one end of the second tube body, and are close to the spherical structure of the second tube body. The other parts of one end of the third tube body except its terminal end are cylindrical. The other end of the third tube body is also cylindrical, and the inner diameter of the other end of the third tube body is larger than the inner diameter of the other parts of one end of the third tube body except its terminal end. The spherical structure of the third tube body is located on the inner wall of one end of the third tube body. The multiple fixing seats on the third tube body are spaced apart along the circumferential direction of one end of the third tube body and close to the spherical structure of the third tube body. The pressure cover is cylindrical. When the axes of the first tube body, the second tube body, the third tube body and the fourth tube body are in a straight line, the connecting line of the fixing seat and the corresponding pair of positioning pins forms an isosceles triangle. Each connecting axis is parallel to the corresponding pair of positioning pins, and the spacing between the fixing seat and the corresponding pair of positioning pins is the same.

9. The pulverized coal pipeline compensator according to claim 8, characterized in that: One end of the first tube body and one end of the second tube body, as well as one end of the third tube body and one end of the fourth tube body are respectively provided with six locking structures for connecting and locking the two.

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