A steel-jacketed steam insulation pipe connection device with bidirectional sealing function

Abstract

This invention discloses a steel-jacketed steam insulation pipe connection device with bidirectional sealing function, belonging to the field of insulation pipe connection technology. It includes a connecting sleeve with grooves at both ends. A sealing gasket is installed inside each groove. Two cavities are formed inside the side wall of the connecting sleeve. A first connecting groove and a second connecting groove are formed at the end of each cavity near the groove. A pressing assembly is installed inside the groove. The pressing assembly includes a pressing plate slidably installed inside the groove and a pressure-bearing rod slidably installed inside the first connecting groove. A connecting groove is formed at the end of each cavity away from the groove. This invention uses the pressure-bearing rod and the push plate to press the sealing gasket, preventing leakage caused by gaps between the sealing gasket and the insulation pipe due to high pressure in the insulation pipe. The pressing force ensures a tighter fit between the sealing gasket, the insulation pipe, and the connecting sleeve, preventing leakage due to deformation of the sealing gasket caused by high pressure.

Description

Technical Field

[0001] This invention relates to the field of insulation pipe connection technology, and more specifically, to a steel-jacketed steam insulation pipe connection device with bidirectional sealing function. Background Technology

[0002] During long-distance steam insulation pipeline transportation, the pipeline will undergo axial displacement due to thermal expansion and contraction. To accommodate this displacement, a connecting device needs to be installed between the pipelines. The most critical component is the sealing structure. The sealing structure of traditional steel-jacketed steam insulation pipe connection devices usually uses a simple sealing gasket. However, these traditional sealing structures have some shortcomings. For example, under the action of high-temperature and high-pressure steam, the sealing gasket is easily compressed and deformed, and even gaps may be formed between it and the insulation pipe and the connecting sleeve, resulting in steam leakage. Especially after the pipeline has been running for a period of time, due to temperature and pressure fluctuations, aging and wear of the sealing gasket, the leakage problem will become more prominent.

[0003] Traditional connection devices cannot guarantee reliable and stable sealing performance and reduce steam leakage during use. Therefore, this invention provides a steel-jacketed steam insulation pipe connection device with bidirectional sealing function, which can apply a pre-tightening force to the sealing gasket when the sealing gasket is slightly worn, so that it fits tightly with the insulation pipe and the connecting sleeve. Summary of the Invention

[0004] To address the problems existing in the prior art, the purpose of this invention is to provide a steel-jacketed steam insulation pipe connection device with bidirectional sealing function.

[0005] To solve the above problems, the present invention adopts the following technical solution.

[0006] A steel-jacketed steam insulation pipe connection device with bidirectional sealing function includes a connecting sleeve, both ends of which are provided with grooves, and a sealing gasket is installed inside the grooves. Two cavities are provided inside the side wall of the connecting sleeve, and a first connecting groove and a second connecting groove are provided at the end of the cavity near the groove. The first connecting groove and the second connecting groove are both in communication with the inside of the groove.

[0007] An extrusion assembly is installed inside the groove. The extrusion assembly includes an extrusion plate that is slidably installed inside the groove, and the extrusion plate extrudes the sealing gasket.

[0008] The extrusion assembly also includes a pressure rod that is slidably installed inside the first connecting groove, and one end of the pressure rod located inside the groove is fixedly connected to the extrusion plate;

[0009] Two cavities have a connecting groove at the end away from the groove, and the connecting groove communicates with the inside of the connecting sleeve.

[0010] Furthermore, the cavity is filled with particles made of polymer material, and a pusher plate is slidably installed inside the cavity to compress the air and polymer material particles inside the cavity.

[0011] Furthermore, a compression spring is fixedly installed at one end of the push plate, one end of the compression spring is fixedly connected to the push plate, and the end of the compression spring away from the push plate is fixedly connected to the inner wall of the cavity.

[0012] Furthermore, a pressing rod is slidably installed inside the second connecting groove. The pressing rod is inclined, and a pressure groove is formed at the end of the sealing gasket near the pressing rod. The inner wall of the pressure groove is inclined, and the end of the pressing rod presses against the inner wall of the pressure groove. A return spring is installed at the end of the pressing rod away from the sealing gasket, and the end of the return spring away from the pressing rod is fixedly connected to the inner wall of the second connecting groove. Both the pressing rod and the pressure rod are filter mesh structures, and they are used to block polymer particles.

[0013] Furthermore, an extension rod is slidably installed inside the cavity. The upper end of the extension rod extends through the inner wall of the cavity to the outside of the connecting sleeve. A support spring is sleeved on the outside of the extension rod. One end of the support spring is fixedly connected to the extension rod, and the other end of the support spring is fixedly connected to the inner wall of the cavity. A switch is fixedly installed on the upper side of the connecting sleeve at a position corresponding to the extension rod. An alarm is also installed on the outside of the connecting sleeve. The switch is used to control the alarm. After the extension rod is fully raised, the upper end is pressed into contact with the switch.

[0014] Furthermore, the connecting sleeve is provided with multiple pull rods on its exterior. The pull rods are in the shape of an "L" and are used to compress the connecting flange on the pipeline.

[0015] Furthermore, a plurality of notches are provided on one side of the inner wall of the cavity, the number of which is the same as the number of pull rods. A pressure block is rotatably connected inside the notch, and the pressure block is inclinedly arranged inside the notch. The push plate is in pressure contact with the pressure block. A first connecting spring is provided between the pressure block and the inner wall of the notch. One end of the first connecting spring is fixedly connected to the inner wall of the notch, and the other end of the first connecting spring is fixedly connected to the pressure block. The first connecting spring compresses the pressure block.

[0016] Furthermore, a connecting frame is fixedly installed at the end of the pressure block away from the cavity. The end of the connecting frame away from the pressure block is located outside the connecting sleeve, and the lower side of the end of the connecting frame away from the pressure block is rotatably connected to the pull rod. A second connecting spring is provided between the pull rod and the connecting frame. One end of the second connecting spring is fixedly connected to the pull rod, and the other end of the second connecting spring is fixedly connected to the connecting frame. The second connecting spring compresses the pull rod.

[0017] Compared with the prior art, the beneficial effects of the present invention are as follows:

[0018] (1) The present invention can squeeze the sealing gasket by setting the pressure rod and push plate, so as to avoid leakage caused by the high pressure in the insulation pipe. The squeezing force can make the gap between the sealing gasket, the insulation pipe and the connecting sleeve fit better, and prevent leakage caused by the deformation of the sealing gasket due to high pressure.

[0019] (2) The present invention can squeeze the inclined inner wall of the pressure groove by setting the extrusion rod, thereby converting the extrusion force into decomposed forces in different directions. Even after the gasket is worn, the gasket can still be tightly attached to the heat insulation pipe, thus improving the sealing performance.

[0020] (3) The present invention can squeeze the flange on the insulation pipe by means of the set tie rod under the action of the connecting frame and the pressure block, so that the insulation pipe can fit tightly with the rubber gasket. At the same time, it can effectively reduce the distance that the insulation pipe moves relative to the connecting sleeve when the pipe vibrates, reduce the gap between the insulation pipe and the connecting sleeve when the pipe vibrates, and make the sealing better. Attached Figure Description

[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;

[0022] Figure 2 This is a schematic diagram of the internal structure of the connecting sleeve of the present invention;

[0023] Figure 3 This is a schematic diagram of the groove portion and the sealing gasket portion of the present invention;

[0024] Figure 4 This is a schematic diagram of the structure of the pressure rod and the compression rod of the present invention;

[0025] Figure 5 This is a schematic diagram of the internal structure of the cavity in this invention;

[0026] Figure 6 This is a schematic diagram of the extension rod portion of the present invention;

[0027] Figure 7 This is a schematic diagram of the tie rod structure of the present invention.

[0028] Description of the numbers in the figure:

[0029] 1. Connecting sleeve; 101. Groove; 102. Sealing gasket; 103. Cavity; 104. First connecting groove; 105. Second connecting groove; 106. Communicating groove; 107. Push plate; 108. Compression spring; 109. Pressure groove; 110. Alarm; 111. Pull rod; 112. Notch; 113. Pressure block; 114. First connecting spring; 115. Connecting frame; 116. Second connecting spring;

[0030] 2. Extrusion assembly; 201. Extrusion plate; 202. Pressure rod; 203. Extrusion rod; 204. Return spring;

[0031] 3. Extending rod; 301. Support spring; 302. Switch. Detailed Implementation

[0032] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. All other embodiments obtained by those skilled in the art based on the embodiments of the present invention without creative effort are within the scope of protection of the present invention.

[0033] Please see Figures 1 to 7 A steel-jacketed steam insulation pipe connection device with bidirectional sealing function includes a connecting sleeve 1. Both ends of the connecting sleeve 1 are provided with grooves 101. A sealing gasket 102 is installed inside the grooves 101. Two cavities 103 are provided inside the side wall of the connecting sleeve 1. A first connecting groove 104 and a second connecting groove 105 are provided at the end of the cavity 103 near the grooves 101. The first connecting groove 104 and the second connecting groove 105 are both in communication with the inside of the grooves 101.

[0034] An extrusion assembly 2 is installed inside the groove 101. The extrusion assembly 2 includes an extrusion plate 201 that is slidably installed inside the groove 101. The extrusion plate 201 extrudes the sealing gasket 102.

[0035] The extrusion assembly 2 also includes a pressure rod 202 that is slidably installed inside the first connecting groove 104, and one end of the pressure rod 202 located inside the groove 101 is fixedly connected to the extrusion plate 201;

[0036] Two cavities 103 have a connecting groove 106 at the end away from the groove 101. The connecting groove 106 communicates with the inside of the connecting sleeve 1. The cavity 103 is filled with particles made of polymer material. A push plate 107 is slidably installed inside the cavity 103. The push plate 107 is used to squeeze the air and polymer material particles inside the cavity 103. A compression spring 108 is fixedly installed at one end of the push plate 107. One end of the compression spring 108 is fixedly connected to the push plate 107. The end of the compression spring 108 away from the push plate 107 is fixedly connected to the inner wall of the cavity 103.

[0037] A pressing rod 203 is slidably installed inside the second connecting groove 105. The pressing rod 203 is inclined. A pressure groove 109 is opened at the end of the sealing gasket 102 near the pressing rod 203, and the inner wall of the pressure groove 109 is inclined. The end of the pressing rod 203 presses against the inner wall of the pressure groove 109. A return spring 204 is installed at the end of the pressing rod 203 away from the sealing gasket 102. The end of the return spring 204 away from the pressing rod 203 is fixedly connected to the inner wall of the second connecting groove 105. Both the pressing rod 203 and the pressure rod 202 are filter mesh structures. The pressing rod 203 and the pressure rod 202 are used to block polymer material particles.

[0038] By adopting the above technical solution, during use, when high-temperature steam enters the interior of the insulation pipe, the pressure inside the insulation pipe increases. At this time, since the connecting sleeve 1 is connected to the interior of the insulation pipe, the pressure in the connecting sleeve 1 also increases. When the pressure in the connecting sleeve 1 increases, the air pressure enters the connecting groove 106, and then enters the cavity 103 through the connecting groove 106 to squeeze the push plate 107, thereby causing the push plate 107 to move. After the push plate 107 moves, it can squeeze the polymer material particles in the cavity 103, and then let the polymer material particles enter the second connecting groove 105. The polymer material particles can also squeeze the pressure rod 202, causing the pressure rod 202 to drive the extrusion plate 201 to move. After the extrusion plate 201 moves, it can squeeze the sealing gasket 102, thereby causing the sealing gasket 102 to deform. The deformed sealing gasket 102 can squeeze the inner wall of the groove 101 and squeeze the gap between the insulation pipe and the connecting sleeve 1, preventing leakage during the process. Even if the sealing gasket 102 is worn, it can deform under the pressure to effectively seal the gap between the insulation pipe and the connecting sleeve 1, keeping the connection between the insulation pipe and the connecting sleeve 1 sealed. After the polymer material particles enter the second connecting groove 105, they can squeeze the extrusion rod 203, causing the extrusion rod 203 to move and squeeze the inner wall of the pressure groove 109. Since the extrusion rod 203 has an inclined structure, the pressure groove 109, after being squeezed, can move the sealing gasket 102 in the direction perpendicular to the insulation pipe and in the direction parallel to the insulation pipe under the decomposition of the extrusion pressure, further improving the sealing performance of the sealing gasket 102. The compression spring 108 can move the push plate 107 to the initial position when the insulation pipe is not in use, making it easier for the staff to replace the polymer material in the cavity 103. The return spring 204 can pull the extrusion rod 203, and can move it to the initial position when the polymer material no longer squeezes the extrusion rod 203.

[0039] An extension rod 3 is slidably installed inside the cavity 103. The upper end of the extension rod 3 extends through the inner wall of the cavity 103 to the outside of the connecting sleeve 1. A support spring 301 is sleeved on the outside of the extension rod 3. One end of the support spring 301 is fixedly connected to the extension rod 3, and the other end of the support spring 301 is fixedly connected to the inner wall of the cavity 103. The extrusion rod 203 and the pressure rod 202 are both filter mesh structures, which can block polymer material particles. A switch 302 is fixedly installed on the upper side of the connecting sleeve 1 at the position corresponding to the extension rod 3. An alarm 110 is also installed on the outside of the connecting sleeve 1. The switch 302 is used to control the alarm 110. After the extension rod 3 is fully raised, the upper end is pressed and contacted with the switch 302.

[0040] By adopting the above technical solution, when the sealing gasket 102 is damaged after long-term use and cannot play a sealing role under the pressure of the extrusion plate 201, high-temperature steam will enter the groove 101 from the sealing gasket 102, and pass through the filter mesh extrusion rod 203 and the pressure rod 202 to enter the cavity 103 and come into contact with the polymer material particles. At this time, since the steam contains a large amount of water, the polymer material particles can expand rapidly after contact with the water. The expanded polymer material particles can push the push plate 107 and also push the lower end of the extension rod 3, causing the extension rod 3 to rise again and rise to the top to squeeze the switch 302. At this time, the switch 302 can control the alarm 110 to sound an alarm, thereby reminding the staff to stop the work in time and repair the connection.

[0041] The connecting sleeve 1 is provided with multiple pull rods 111 on the outside. The pull rods 111 are in an "L" shape and are used to compress the connecting flange on the pipe. Multiple notches 112 are provided on one side of the inner wall of the cavity 103. The number of notches 112 is the same as the number of pull rods 111. A pressure block 113 is rotatably connected inside the notch 112. The pressure block 113 is inclinedly arranged inside the notch 112. The push plate 107 is in pressure contact with the pressure block 113. A first connecting spring 114 is provided between the pressure block 113 and the inner wall of the notch 112. One end of the first connecting spring 114 is fixedly connected to the inner wall of the notch 112, and the other end of the first connecting spring 114 is fixedly connected to the pressure block 113. The first connecting spring 114 compresses the pressure block 113.

[0042] A connecting frame 115 is fixedly installed at one end of the pressure block 113 away from the cavity 103. The end of the connecting frame 115 away from the pressure block 113 is located outside the connecting sleeve 1, and the lower side of the end of the connecting frame 115 away from the pressure block 113 is rotatably connected to the pull rod 111. A second connecting spring 116 is provided between the pull rod 111 and the connecting frame 115. One end of the second connecting spring 116 is fixedly connected to the pull rod 111, and the other end of the second connecting spring 116 is fixedly connected to the connecting frame 115. The second connecting spring 116 compresses the pull rod 111.

[0043] By adopting the above technical solution, after the push plate 107 moves a certain distance, it can squeeze the pressure block 113, so that the pressure block 113 has a tendency to rotate relative to the notch 112. When the pressure block 113 has a tendency to rotate relative to the notch 112, it can drive the connecting frame 115, so that the connecting frame 115 also has a tendency to rotate relative to the connecting sleeve 1. At this time, the pull rod 111 that rotates relative to the connecting frame 115 can be pulled by the connecting frame 115, thereby squeezing the flange on the insulation pipe, so that the flange on the insulation pipe is tightly fitted with the connecting sleeve 1, avoiding the gap between the sealing gasket 102 and the flange on the insulation pipe caused by vibration, and further ensuring that the sealing gasket 102 can be tightly fitted with the insulation pipe.

[0044] Instructions for use: Push the pull rod 111 to rotate it, align the flange on the insulation pipe with the end of the connecting sleeve 1, and press the end of the insulation pipe against the sealing gasket 102. Then release the pull rod 111, allowing it to rotate under the action of the second connecting spring 116. The "L"-shaped pull rod 111 can hook onto the flange on the insulation pipe. Afterward, use bolts to fix the flange on the insulation pipe to the connecting sleeve 1. During use, the pressure rise in the insulation pipe can press the push plate 107. The push plate 107 can move a certain distance before being blocked by the pressure block 113 and thus cannot move further. At this time, the extension rod will only rise a small distance. During the movement of the push plate 107, the polymer material particles are squeezed, which can cause the polymer material particles to squeeze the pressure rod 202 and the extrusion rod 203, causing the sealing gasket 102 to deform and improving the sealing performance between the insulation pipe and the connecting sleeve 1. When the sealing gasket 102 is damaged and can no longer be used, the moisture in the steam can cause the polymer material to expand after contact with it, thereby causing the extension rod 3 to rise to the highest point. When the extension rod 3 rises to the top, it can squeeze and trigger the switch 302. After the switch 302 is triggered, it can control the alarm 110 to sound an alarm, thereby reminding the staff to repair the connection in time.

[0045] The above are merely preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and its improved concept, should be covered within the scope of protection of the present invention.

Claims

1. A steel-jacketed steam insulation pipe connection device with bidirectional sealing function, comprising a connecting sleeve (1), characterized in that: The connecting sleeve (1) has grooves (101) at both ends, and a sealing gasket (102) is installed inside the grooves (101). The connecting sleeve (1) has two cavities (103) inside its side wall. The cavity (103) near the groove (101) has a first connecting groove (104) and a second connecting groove (105). The first connecting groove (104) and the second connecting groove (105) are both connected to the inside of the groove (101). An extrusion assembly (2) is installed inside the groove (101). The extrusion assembly (2) includes an extrusion plate (201) that is slidably installed inside the groove (101). The extrusion plate (201) extrudes the sealing gasket (102). The extrusion assembly (2) further includes a pressure rod (202) slidably installed inside the first connecting groove (104), and one end of the pressure rod (202) located inside the groove (101) is fixedly connected to the extrusion plate (201); Two cavities (103) have a connecting groove (106) at one end away from the groove (101), and the connecting groove (106) is connected to the inside of the connecting sleeve (1); The cavity (103) is filled with particles made of polymer material, and a pusher plate (107) is slidably installed inside the cavity (103). The pusher plate (107) is used to compress the air and polymer material particles inside the cavity (103). A pressing rod (203) is slidably installed inside the second connecting groove (105). The pressing rod (203) is inclined. A pressure groove (109) is opened at one end of the sealing gasket (102) near the pressing rod (203), and the inner wall of the pressure groove (109) is inclined. The end of the pressing rod (203) presses the inner wall of the pressure groove (109).

2. The steel-jacketed steam insulation pipe connection device with bidirectional sealing function according to claim 1, characterized in that: A compression spring (108) is fixedly installed at one end of the push plate (107). One end of the compression spring (108) is fixedly connected to the push plate (107), and the end of the compression spring (108) away from the push plate (107) is fixedly connected to the inner wall of the cavity (103).

3. The steel-jacketed steam insulation pipe connection device with bidirectional sealing function according to claim 2, characterized in that: A return spring (204) is installed at the end of the extrusion rod (203) away from the sealing gasket (102). The end of the return spring (204) away from the extrusion rod (203) is fixedly connected to the inner wall of the second connecting groove (105). Both the extrusion rod (203) and the pressure rod (202) are filter mesh structures. The extrusion rod (203) and the pressure rod (202) are used to block polymer material particles.

4. The steel-jacketed steam insulation pipe connection device with bidirectional sealing function according to claim 3, characterized in that: An extension rod (3) is slidably installed inside the cavity (103). The upper end of the extension rod (3) extends through the inner wall of the cavity (103) to the outside of the connecting sleeve (1). A support spring (301) is sleeved on the outside of the extension rod (3). One end of the support spring (301) is fixedly connected to the extension rod (3), and the other end of the support spring (301) is fixedly connected to the inner wall of the cavity (103). A switch (302) is fixedly installed on the upper side of the connecting sleeve (1) at the position corresponding to the extension rod (3). An alarm (110) is also installed on the outside of the connecting sleeve (1). The switch (302) is used to control the alarm (110). After the extension rod (3) is fully raised, the upper end is pressed against the switch (302).

5. A steel-jacketed steam insulation pipe connection device with bidirectional sealing function according to claim 4, characterized in that: The connecting sleeve (1) is provided with multiple pull rods (111) on the outside. The pull rods (111) are in an "L" shape and are used to compress the connecting flange on the pipeline.

6. The steel-jacketed steam insulation pipe connection device with bidirectional sealing function according to claim 5, characterized in that: The cavity (103) has multiple notches (112) on one side of its inner wall. The number of notches (112) is the same as the number of pull rods (111). A pressure block (113) is rotatably connected inside the notch (112), and the pressure block (113) is inclinedly arranged inside the notch (112). The push plate (107) is in pressure contact with the pressure block (113). A first connecting spring (114) is provided between the pressure block (113) and the inner wall of the notch (112). One end of the first connecting spring (114) is fixedly connected to the inner wall of the notch (112), and the other end of the first connecting spring (114) is fixedly connected to the pressure block (113). The first connecting spring (114) presses the pressure block (113).

7. A steel-jacketed steam insulation pipe connection device with bidirectional sealing function according to claim 6, characterized in that: A connecting frame (115) is fixedly installed at one end of the pressure block (113) away from the cavity (103). The end of the connecting frame (115) away from the pressure block (113) is located outside the connecting sleeve (1), and the lower side of the end of the connecting frame (115) away from the pressure block (113) is rotatably connected to the pull rod (111). A second connecting spring (116) is provided between the pull rod (111) and the connecting frame (115). One end of the second connecting spring (116) is fixedly connected to the pull rod (111), and the other end of the second connecting spring (116) is fixedly connected to the connecting frame (115). The second connecting spring (116) compresses the pull rod (111).

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