Steel-in-steel steam thermal insulation pipe connecting device with bidirectional sealing function

Abstract

The invention discloses a steel jacket steel steam thermal insulation pipe connecting device with a bidirectional sealing function, which belongs to the technical field of thermal insulation pipe connection and comprises a connecting sleeve, grooves are formed in two ends of the connecting sleeve, sealing gaskets are mounted in the grooves, and two cavities are formed in the side wall of the connecting sleeve. A first connecting groove and a second connecting groove are formed in the ends, close to the groove, of the cavities, an extrusion assembly is installed in the groove and comprises an extrusion plate installed in the groove in a sliding mode, the extrusion assembly further comprises a pressed rod installed in the first connecting groove in a sliding mode, and communicating grooves are formed in the ends, away from the groove, of the two cavities; a sealing gasket can be extruded through an arranged pressed rod and a push plate, the situation that leakage occurs after a gap is generated between the sealing gasket and the heat preservation pipe due to high pressure in the heat preservation pipe is avoided, and the sealing gasket can be better attached to the gap between the heat preservation pipe and the connecting sleeve through extrusion force; and leakage caused by deformation of the sealing gasket due to high pressure is prevented.

Description

Technical Field

[0001] The present invention relates to the technical field of thermal insulation pipe connection, and more particularly to a steel-jacketed steel steam thermal insulation pipe connection device with a bidirectional sealing function. Background Art

[0002] During long-distance transportation, steam insulated pipes will produce axial displacement due to thermal expansion and contraction. In order to adapt to this displacement, a connecting device needs to be set between the pipes. The most critical component is the sealing structure. The sealing structure of traditional steel-jacketed steel steam insulated pipe connecting devices usually uses simple sealing gaskets. 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 a gap is generated between the insulated 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 connecting devices cannot guarantee reliable and stable sealing performance when in use, and reduce steam leakage. Therefore, the present invention provides a steel-jacketed steel steam insulation pipe connecting device with a two-way sealing function, which is used to 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] In view of the problems existing in the prior art, the object of the present invention is to provide a steel-jacketed steel steam insulation pipe connection device with a bidirectional sealing function.

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

[0006] A steel-jacketed steel steam insulated pipe connection device with a bidirectional sealing function includes a connection sleeve, grooves are formed at both ends of the connection sleeve, sealing gaskets are installed in the grooves, two cavities are formed in the side wall of the connection sleeve, and a first connection groove and a second connection groove are formed at one end of the cavity near the groove, and the first connection groove and the second connection groove are both connected to the interior of the groove; An extrusion assembly is installed inside the groove, and the extrusion assembly includes an extrusion plate slidably installed inside the groove, and the extrusion plate extrudes the sealing gasket; The extrusion assembly further includes a compression rod slidably mounted inside the first connecting groove, wherein one end of the compression rod located inside the groove is fixedly connected to the extrusion plate; A communication groove is formed at one end of the two cavities away from the groove, and the communication groove is communicated with the interior of the connecting sleeve.

[0007] Furthermore, particles made of polymer materials are contained in the cavity, and a push plate is slidably installed in the cavity, and the push plate is used to squeeze the air and polymer material particles in the cavity.

[0008] Furthermore, a compression spring is fixedly mounted on one end of the push plate, one end of the compression spring is fixedly connected to the push plate, and one end of the compression spring away from the push plate is fixedly connected to the inner wall of the cavity.

[0009] Furthermore, an extrusion rod is slidably installed inside the second connecting groove, and the extrusion rod is arranged in an inclined shape. A pressure groove is opened at one end of the sealing gasket close to the extrusion rod, and the inner wall of the pressure groove is an inclined structure. The end of the extrusion rod squeezes the inner wall of the pressure groove, and a return spring is installed at the end of the extrusion rod away from the sealing gasket. The end of the return spring away from the extrusion rod is fixedly connected to the inner wall of the second connecting groove. The extrusion rod and the pressure rod are both filter-like structures, and the extrusion rod and the pressure rod are used to block polymer material particles.

[0010] Furthermore, an extension rod is slidably installed inside the cavity, and the upper end of the extension rod passes through the inner wall of the cavity and extends to the outside of the connecting sleeve, and a support spring is provided on the outer sleeve 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 at a position corresponding to the extension rod on the upper side of the connecting sleeve, and an alarm is also installed on the outside of the connecting sleeve, the switch is used to control the alarm, and after the extension rod is fully raised, the upper end is squeezed and contacted with the switch.

[0011] Furthermore, a plurality of pull rods are provided on the outside of the connecting sleeve, and the pull rods are in an "L"-shaped structure, and the pull rods are used to squeeze the connecting flange on the pipeline.

[0012] Furthermore, a plurality of notches are provided on one side of the inner wall of the cavity, the number of the notches is the same as the number of the pull rods, a pressure block is rotatably connected inside the notch, and the pressure block is tiltedly arranged inside the notch, the push plate is in extrusion contact with the pressure block, and 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, and the first connecting spring squeezes the pressure block.

[0013] Furthermore, a connecting frame is fixedly installed on 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, and 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, and the second connecting spring squeezes the pull rod.

[0014] Compared with the prior art, the present invention has the following beneficial effects: (1) The present invention can squeeze the sealing gasket by providing a pressure rod and a push plate, thereby preventing leakage caused by a gap between the sealing gasket and the insulation pipe due to the high pressure in the insulation pipe. The squeezing force can make the gap between the sealing gasket and the insulation pipe and the connecting sleeve fit more closely, thereby preventing the sealing gasket from being deformed and leaking due to the high pressure.

[0015] (2) The present invention can squeeze the inclined inner wall of the pressure groove through the extrusion rod, thereby converting the extrusion force into decomposition force in different directions. After the sealing gasket is worn, the sealing gasket can still fit tightly with the insulation pipe, thereby improving the sealing performance.

[0016] (3) The pull rod provided in the present invention can squeeze the flange on the insulation pipe under the action of the connecting frame and the pressure block, so that the insulation pipe can fit tightly with the rubber pad. At the same time, it can effectively reduce the distance that the insulation pipe moves relative to the connecting sleeve when the pipeline vibrates, and reduce the gap between the insulation pipe and the connecting sleeve when the pipeline vibrates, so as to achieve better sealing. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a schematic diagram of the overall structure of the present invention; Figure 2 This is a schematic diagram of the internal structure of the connecting sleeve of the present invention; Figure 3 It is a structural schematic diagram of the groove part and the sealing gasket part of the present invention; Figure 4 It is a schematic diagram of the structure of the compression rod and the extrusion rod of the present invention; Figure 5 Schematic diagram of the internal structure of the cavity of the present invention; Figure 6 It is a schematic structural diagram of the extension rod portion of the present invention; Figure 7 It is a schematic structural diagram of the pull rod part of the present invention.

[0018] Description of the numbers in the figure: 1. Connecting sleeve; 101. Groove; 102. Sealing gasket; 103. Cavity; 104. First connecting groove; 105. Second connecting groove; 106. Connecting groove; 107. Push plate; 108. Extrusion 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. 2. Extrusion assembly; 201. Extrusion plate; 202. Compression rod; 203. Extrusion rod; 204. Return spring; 3. Extension rod; 301. Support spring; 302. Switch. DETAILED DESCRIPTION

[0019] The technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention; it is obvious that the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative work are within the scope of protection of the present invention.

[0020] See also Figures 1 to 7 A steel-jacketed steel steam insulated pipe connection device with a bidirectional sealing function includes a connection sleeve 1, a groove 101 is formed at both ends of the connection sleeve 1, a sealing gasket 102 is installed inside the groove 101, and two cavities 103 are formed inside the side wall of the connection sleeve 1. A first connecting groove 104 and a second connecting groove 105 are formed at one end of the cavity 103 near the groove 101. The first connecting groove 104 and the second connecting groove 105 are both connected to the interior of the groove 101; An extrusion assembly 2 is installed inside the groove 101. The extrusion assembly 2 includes an extrusion plate 201 slidably installed inside the groove 101. The extrusion plate 201 extrudes the sealing gasket 102. The extrusion assembly 2 further includes a compression rod 202 slidably mounted inside the first connection groove 104 , and one end of the compression rod 202 located inside the groove 101 is fixedly connected to the extrusion plate 201 ; A connecting groove 106 is formed at one end of the two cavities 103 away from the groove 101. The connecting groove 106 is connected to the interior of the connecting sleeve 1. Particles made of polymer material are contained in the cavity 103. 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. An extrusion spring 108 is fixedly installed at one end of the push plate 107. One end of the extrusion spring 108 is fixedly connected to the push plate 107. The end of the extrusion spring 108 away from the push plate 107 is fixedly connected to the inner wall of the cavity 103. An extrusion rod 203 is slidably installed inside the second connecting groove 105, and the extrusion rod 203 is arranged in an inclined shape. A pressure groove 109 is opened at the end of the sealing gasket 102 close to the extrusion rod 203, and the inner wall of the pressure groove 109 is an inclined structure. The end of the extrusion rod 203 squeezes the inner wall of the pressure groove 109, and 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. The extrusion rod 203 and the pressure rod 202 are both filter-like structures, and the extrusion rod 203 and the pressure rod 202 are used to block polymer material particles.

[0021] By adopting the above technical solution, when in use, when high-temperature steam enters the insulation pipe, the pressure inside the insulation pipe increases. At this time, since the connecting sleeve 1 is connected to the inside of the insulation pipe, the pressure in the connecting sleeve 1 will also increase. When the pressure in the connecting sleeve 1 increases, the air pressure will enter the connecting groove 106, and then enter 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 make the polymer material particles enter the second connecting groove 105, and the polymer material particles can squeeze the pressure rod 202, so that the pressure rod 202 drives 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, thereby avoiding leakage during the process. Now, even if the sealing gasket 102 is worn, it can still deform under the action of the extrusion force and effectively block the gap between the insulation pipe and the connecting sleeve 1, so that the connection between the insulation pipe and the connecting sleeve 1 remains sealed. After the polymer material particles enter the second connecting groove 105, they can squeeze the extrusion rod 203, so that the extrusion rod 203 moves to squeeze the inner wall of the pressure groove 109. Since the extrusion rod 203 is an inclined structure, the pressure groove 109 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 action of the decomposition force of the extrusion force after being squeezed, thereby further improving the sealing performance of the sealing gasket 102. When the insulation pipe is not in use, the extrusion spring 108 can move the push plate 107 to the initial position, which is convenient for the staff to replace the polymer material in the cavity 103. The reset spring 204 can pull the extrusion rod 203, and when the polymer material does not squeeze the extrusion rod 203, it can move it to the initial position.

[0022] An extension rod 3 is slidably installed inside the cavity 103, and the upper end of the extension rod 3 passes through the inner wall of the cavity 103 and extends to the outside of the connecting sleeve 1, and a support spring 301 is provided 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-like structures, which can block polymer material particles. A switch 302 is fixedly installed at the position corresponding to the extension rod 3 on the upper side of the connecting sleeve 1, and 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 squeezed and contacted with the switch 302.

[0023] By adopting the above technical solution, when the sealing gasket 102 is damaged due to long-term use and cannot perform a sealing role under the extrusion of the extrusion plate 201, high-temperature steam will enter the groove 101 from the sealing gasket 102, and pass through the filter-like extrusion rod 203 and the pressure rod 202 to enter the interior of the cavity 103 and contact the polymer material particles. At this time, since there is a large amount of water in the steam, the water can cause the polymer material particles to expand rapidly after contacting with the polymer material particles. The expanded polymer material particles can push the push plate 107, and can also push the lower end of the extending rod 3, so that the extending rod 3 rises again, and rises to the uppermost end to squeeze the switch 302. At this time, the switch 302 can control the alarm 110 to alarm, thereby reminding the staff to stop working in time and repair the connection.

[0024] A plurality of pull rods 111 are provided on the outside of the connecting sleeve 1. The pull rods 111 are in an "L"-shaped structure and are used to squeeze the connecting flange on the pipe. A plurality of notches 112 are provided on one side of the inner wall of the cavity 103. The number of the notches 112 is the same as the number of the pull rods 111. A pressure block 113 is rotatably connected to the inside of the notch 112, and the pressure block 113 is tilted inside the notch 112. The push plate 107 is in compression 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 squeezes the pressure block 113. A connecting frame 115 is fixedly installed on the end of the pressure block 113 away from the cavity 103, and 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, and the second connecting spring 116 squeezes the pull rod 111.

[0025] 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 together with the connecting sleeve 1, avoiding the generation of a gap between the sealing gasket 102 and the flange on the insulation pipe due to vibration, and further ensuring that the sealing gasket 102 can fit tightly with the insulation pipe.

[0026] 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 squeeze the end of the insulation pipe against the sealing gasket 102, then loosen the pull rod 111, so that it rotates under the action of the second connecting spring 116, and the "L"-shaped pull rod 111 can hook the flange on the insulation pipe, and then use bolts to fix the flange on the insulation pipe to the connecting sleeve 1. During use, the rising pressure in the insulation pipe can squeeze the push plate 107, and the push plate 107 can be blocked by the pressure block 113 after moving a certain distance and can no longer move. At this time, the extension rod will only rise a short distance, and at the same time When the push plate 107 moves, 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, thereby improving the sealing 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 contacting with the polymer material, thereby causing the extending rod 3 to rise to the highest point. When the extending rod 3 rises to the uppermost end, the switch 302 can be squeezed to trigger the switch 302. After the switch 302 is triggered, the alarm 110 can be controlled to sound an alarm, thereby reminding the staff to repair the connection in time.

[0027] The above are only preferred embodiments of the present invention; however, the scope of protection of the present invention is not limited thereto. Any person skilled in the art who, within the technical scope disclosed by the present invention, makes equivalent substitutions or modifications based on the technical solutions and improved concepts of the present invention shall be covered by the scope of protection of the present invention.

Claims

1. A steel jacketed steel steam insulation pipe connection device with a bidirectional sealing function, comprising a connection sleeve (1), characterized in that: Both ends of the connecting sleeve (1) are provided with grooves (101), a sealing gasket (102) is installed inside the groove (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 one end of the cavity (103) close to the groove (101), and the first connecting groove (104) and the second connecting groove (105) are both communicated with the inside of the groove (101); An extrusion assembly (2) is installed inside the groove (101), and the extrusion assembly (2) comprises an extrusion plate (201) slidably installed inside the groove (101), and the extrusion plate (201) extrudes the sealing gasket (102); The extrusion assembly (2) further comprises a pressure rod (202) slidably mounted inside the first connection groove (104), wherein one end of the pressure rod (202) located inside the groove (101) is fixedly connected to the extrusion plate (201); A communication groove (106) is provided at one end of the two cavities (103) away from the groove (101), and the communication groove (106) is communicated with the interior of the connecting sleeve (1).

2. The steel-jacketed steel steam insulation pipe connection device with a bidirectional sealing function according to claim 1, characterized in that: 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).

3. The steel-jacketed steel steam insulation pipe connection device with a bidirectional sealing function according to claim 2, characterized in that: An extrusion spring (108) is fixedly mounted on one end of the push plate (107), one end of the extrusion spring (108) is fixedly connected to the push plate (107), and one end of the extrusion spring (108) away from the push plate (107) is fixedly connected to the inner wall of the cavity (103).

4. The steel-jacketed steel steam insulation pipe connection device with a bidirectional sealing function according to claim 3, characterized in that: An extrusion rod (203) is slidably installed inside the second connecting groove (105), and the extrusion rod (203) is arranged in an inclined shape. A pressure groove (109) is opened at one end of the sealing gasket (102) close to the extrusion rod (203), and the inner wall of the pressure groove (109) is in an inclined structure. The end of the extrusion rod (203) squeezes the inner wall of the pressure groove (109). A return spring (204) is installed at one end of the extrusion rod (203) away from the sealing gasket (102), and 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). The extrusion rod (203) and the pressure rod (202) are both filter mesh structures, and the extrusion rod (203) and the pressure rod (202) are used to block polymer material particles.

5. The steel-jacketed steel steam insulation pipe connection device with a bidirectional sealing function according to claim 4, characterized in that: A protruding rod (3) is slidably mounted inside the cavity (103), the upper end of the protruding rod (3) passes through the inner wall of the cavity (103) and extends to the outside of the connecting sleeve (1), and a supporting spring (301) is provided on the outer sleeve of the protruding rod (3), one end of the supporting spring (301) is fixedly connected to the protruding rod (3), and the other end of the supporting spring (301) is fixedly connected to the inner wall of the cavity (103), a switch (302) is fixedly mounted at a position corresponding to the protruding rod (3) on the upper side of the connecting sleeve (1), and an alarm (110) is also mounted on the outside of the connecting sleeve (1), the switch (302) is used to control the alarm (110), and the upper end of the protruding rod (3) is in compression contact with the switch (302) after the protruding rod (3) is fully raised.

6. The steel-jacketed steel steam insulation pipe connection device with a bidirectional sealing function according to claim 5, characterized in that: A plurality of pull rods (111) are provided on the outside of the connecting sleeve (1), the pull rods (111) are in an "L"-shaped structure, and the pull rods (111) are used to squeeze the connecting flange on the pipeline.

7. The steel-jacketed steel steam insulation pipe connection device with a bidirectional sealing function according to claim 6, characterized in that: A plurality of notches (112) are provided on one side of the inner wall of the cavity (103), and the number of the notches (112) is the same as the number of the pull rods (111). A pressure block (113) is rotatably connected inside the notch (112), and the pressure block (113) is tiltedly arranged inside the notch (112). The push plate (107) is in compression contact with the pressure block (113), and 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), and the first connecting spring (114) compresses the pressure block (113).

8. The steel-jacketed steel steam insulation pipe connection device with a bidirectional sealing function according to claim 7, characterized in that: A connecting frame (115) is fixedly installed on one end of the pressure block (113) away from the cavity (103), and 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), and 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), and the second connecting spring (116) squeezes the pull rod (111).

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