A vulcanized pipe
By setting a barrier in the vulcanization chamber of the vulcanization pipeline, the problem of steam impacting the cable in the existing vulcanization pipeline is solved, and a safer and more efficient vulcanization process is achieved.
Patent Information
- Application Number
- CN202211683488.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Patents(China)
- Current Assignee / Owner
- Filing Date
- 2022-12-27
- Publication Date
- 2025-05-13
- Estimated Expiration
- 2042-12-27
AI Technical Summary
When steam is input in existing vulcanized pipelines, high temperature and high pressure steam will cause impact on the cable, which can easily lead to cable damage.
A vulcanized pipe is designed, and a barrier portion is provided in the vulcanized cavity, and the barrier portion is at least partially located between the steam inlet hole and the axis of the pipe body to prevent steam from being directly sprayed to the cable.
It effectively reduces the impact of steam on the cable, avoids cable damage, and improves the safety and efficiency of the vulcanization process.
Smart Images

Figure CN116160598B_ABST
Abstract
Description
Technical Field
[0001] The invention relates to the technical field of cable processing, and in particular to a vulcanized pipeline. Background Art
[0002] Cables are usually composed of an internal metal core and a rubber protective sheath wrapped around the core. After the rubber protective sheath is wrapped around the metal core, it needs to be vulcanized. Vulcanization refers to the chemical change process in which the linear macromolecules of rubber form a three-dimensional network structure through chemical cross-linking. After vulcanization, the rubber protective sheath can significantly improve various properties.
[0003] Cable vulcanization is generally carried out through a vulcanization pipeline, which is connected to a steam pipe. The steam pipe inputs high-temperature and high-pressure steam into the vulcanization pipeline. The cable passes through the vulcanization pipeline, and the high-temperature and high-pressure steam can vulcanize the rubber protective cover of the cable. Existing vulcanization pipelines have the following disadvantages: when the steam with a large flow rate just enters the vulcanization pipeline from the steam pipe, it will cause a large impact on the cable, which is easy to damage the cable. Summary of the invention
[0004] The present invention aims to solve at least one of the technical problems existing in the prior art. To this end, the present invention provides a vulcanization pipeline that can reduce the damage caused by steam to the cable.
[0005] The vulcanized pipeline according to an embodiment of the present invention comprises:
[0006] A tube body, wherein a vulcanization cavity is formed in the tube body, and a steam inlet hole communicating with the vulcanization cavity is provided on a side wall of the tube body;
[0007] The blocking portion is arranged in the vulcanization chamber corresponding to the steam inlet hole, and at least a part of the blocking portion is located between the steam inlet hole and the axis of the tube body.
[0008] The vulcanized pipe according to the embodiment of the present invention has at least the following beneficial effects:
[0009] The steam inlet hole is used to connect the steam pipe, and the steam pipe delivers high-temperature and high-pressure steam to the vulcanization chamber of the pipe body through the steam inlet hole, and the steam can vulcanize the cable passing through the pipe body. According to the vulcanization pipeline of the embodiment of the present invention, since a blocking portion is provided in the vulcanization chamber, and the blocking portion is at least partially located between the steam inlet hole and the axis of the pipe body, and the cable generally passes through the pipe body close to the axis of the pipe body, it can be prevented that when the steam enters the vulcanization chamber from the steam inlet hole, the steam is directly sprayed toward the cable, causing damage to the cable.
[0010] According to some embodiments of the present invention, a cross section of the blocking portion along the axial direction of the tube body is in a circular ring shape, and center lines of all the cross sections of the blocking portion coincide with the axis of the tube body.
[0011] According to some embodiments of the present invention, the steam inlet holes are provided at both ends of the tube body, two blocking parts are correspondingly provided and located at both ends of the tube body, the edges of the two blocking parts at one end opposite to each other are sealed and connected to the inner side wall of the tube body, and the outer diameters of the other ends of the two blocking parts gradually increase along the middle position close to the length direction of the tube body.
[0012] According to some embodiments of the present invention, the tube body includes a plurality of unit tubes, and a connecting tube is provided between two adjacent unit tubes. Specifically, the two adjacent unit tubes are respectively defined as a first tube and a second tube, one end of the connecting tube is connected to the first tube via a flange, and the other end of the connecting tube is connected to the second tube, and after the connecting tube is separated from the first tube, the connecting tube can be moved and adjusted along the axial direction of the second tube, and a guiding mechanism for guiding the cable is provided in the connecting tube.
[0013] According to some embodiments of the present invention, a first annular sealing plate is circumferentially provided on the inner wall of one end of the second tube close to the connecting tube, an end of the connecting tube away from the first tube is inserted into the second tube, and a second annular sealing plate is circumferentially provided on the outer wall of one end of the connecting tube away from the first tube, and an annular sealing gasket is provided between the first annular sealing plate and the second annular sealing plate.
[0014] According to some embodiments of the present invention, the guide mechanism includes two guide rollers arranged vertically, the two guide rollers are horizontally disposed and parallel to each other, the outer side walls of the guide rollers are circumferentially provided with an annular recess, and a limiting space for the cable to pass through is formed between the two annular recesses.
[0015] According to some embodiments of the present invention, rubber sealing plates are detachably provided at both ends of the tube body, and the rubber sealing plates are provided with a first avoidance hole for the cable to pass through.
[0016] According to some embodiments of the present invention, end plates are provided at both ends of the tube body, and the end plates are provided with second avoidance holes for cables to pass through. The end surface of the end plate facing away from the vulcanization chamber is provided with a sinker, and the rubber sealing plate is installed in the sinker. The sinker is detachably provided with an annular pressure plate on the side of the rubber sealing plate facing away from the vulcanization chamber, and the annular pressure plate is attached to the rubber sealing plate.
[0017] According to some embodiments of the present invention, the annular pressure plate is provided with a mounting block along the circumferential direction, and the mounting block is located at a side of the end plate away from the vulcanization chamber and is bolted to the end plate.
[0018] According to some embodiments of the present invention, the sink is circular, and the annular pressure plate is correspondingly in a circular shape, so that the annular pressure plate can rotate when the mounting block is separated from the end plate, and the end surface of the end plate facing away from the vulcanization chamber is provided with a locking plate corresponding to the mounting block, the locking plate is parallel to the end plate and a locking groove is formed between the locking plate and the end plate, the mounting block is cooperated and installed in the locking groove, and when the annular pressure plate rotates, all the mounting blocks can be moved out from the same side of the locking groove.
[0019] Additional aspects and advantages of the present invention will be given in part in the following description and in part will be obvious from the following description, or will be learned through practice of the present invention. BRIEF DESCRIPTION OF THE DRAWINGS
[0020] The present invention will be further described below with reference to the accompanying drawings and embodiments, wherein:
[0021] Figure 1 It is a schematic diagram of the overall structure of the present invention;
[0022] Figure 2 for Figure 1 A cross-sectional view of
[0023] Figure 3 It is a structural schematic diagram when the connecting pipe is in one of the states;
[0024] Figure 4 It is a structural schematic diagram when the connecting pipe is in another state;
[0025] Figure 5 for Figure 2 A partial enlarged view of
[0026] Figure 6 It is a structural schematic diagram when the mounting block is in one of the states;
[0027] Figure 7 It is a structural schematic diagram when the mounting block is in another state;
[0028] Figure 8 Schematic diagram of the structure of the guide mechanism.
[0029] Figure Number:
[0030] Tube body 100; vulcanization chamber 101; steam inlet 102; unit tube 103; connecting tube 104; first annular sealing plate 105; second annular sealing plate 106; annular sealing gasket 107; rubber sealing plate 108; first avoidance hole 109; end plate 110; second avoidance hole 111; sink 112; annular pressure plate 113; mounting block 114; locking plate 115;
[0031] A blocking portion 200;
[0032] Guide mechanism 300; guide roller 301; annular recess 302. DETAILED DESCRIPTION
[0033] Embodiments of the present invention are described in detail below, examples of which are shown in the accompanying drawings, wherein the same or similar reference numerals throughout represent the same or similar elements or elements having the same or similar functions. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and cannot be understood as limiting the present invention.
[0034] In the description of the present invention, it should be understood that descriptions involving orientation, such as orientation or positional relationship indicated as up, down, etc., are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as a limitation on the present invention.
[0035] In the description of the present invention, "a plurality" means more than two. If there is a description of "first" or "second", it is only used for the purpose of distinguishing technical features, and cannot be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features or implicitly indicating the order of the indicated technical features.
[0036] In the description of the present invention, unless otherwise clearly defined, terms such as setting, installing, connecting, etc. should be understood in a broad sense, and technicians in the relevant technical field can reasonably determine the specific meanings of the above terms in the present invention based on the specific content of the technical solution.
[0037] Reference below Figures 1 to 8 A vulcanized pipe according to an embodiment of the present invention is described.
[0038] like Figures 1 to 8 As shown, the vulcanization pipeline according to an embodiment of the present invention includes:
[0039] A tube body 100, a vulcanization cavity 101 is formed in the tube body 100, and a steam inlet hole 102 communicating with the vulcanization cavity 101 is provided on the side wall of the tube body 100;
[0040] The blocking portion 200 is disposed in the vulcanization chamber 101 corresponding to the steam inlet hole 102 . At least a portion of the blocking portion 200 is located between the steam inlet hole 102 and the axis of the tube body 100 .
[0041] In this embodiment, the steam inlet hole 102 is used to connect a steam pipe, and the steam pipe delivers high-temperature and high-pressure steam to the vulcanization chamber 101 of the pipe body 100 through the steam inlet hole 102, so that the steam can vulcanize the cable passing through the pipe body 100. According to the vulcanization pipeline of the embodiment of the present invention, since a blocking portion 200 is provided in the vulcanization chamber 101, and the blocking portion 200 is at least partially located between the steam inlet hole 102 and the axis of the pipe body 100, and the cable generally passes through the pipe body 100 close to the axis of the pipe body 100, it can be prevented that when the steam enters the vulcanization chamber 101 from the steam inlet hole 102, the steam is directly sprayed toward the cable, thereby preventing the cable from being damaged.
[0042] It should be noted that, in order to achieve the heat preservation effect, seals may be provided at both ends of the tube body 100, and the seals may be provided with avoidance holes for the cables to pass through. The side wall of the tube body 100 may be provided with air outlet holes. When the cable passes through the tube body 100, in order to avoid the cable and the inner wall of the tube body 100 from contacting and causing wear, the cable generally passes through the tube body 100 close to the axis of the tube body 100. When the high-temperature and high-pressure steam just enters the vulcanization chamber 101, the flow rate is fast and the impact is large. If it is sprayed directly onto the cable, the cable will be softened by the high-temperature steam and subjected to a large impact force, which is easy to cause damage. In this embodiment, a blocking portion 200 is provided to effectively avoid cable damage.
[0043] In some embodiments of the present invention, Figure 2 and Figure 5 As shown, the cross section of the blocking portion 200 along the axial direction of the tube body 100 is annular, and the center lines of all cross sections of the blocking portion 200 coincide with the axis of the tube body 100. That is, the blocking portion 200 is a hollow cylindrical structure. When the cable passes through the vulcanization chamber 101 of the tube body 100, it passes through the blocking portion 200 accordingly, and then the blocking portion 200 can further prevent the steam from spraying directly onto the cable, thereby further preventing the steam from damaging the cable. In addition, a steam guide channel is formed between the outer wall of the blocking portion 200 and the inner wall of the tube body 100, thereby allowing the steam to quickly flow to the surrounding side of the blocking portion 200, and then leave from the surrounding side of the blocking portion 200, so that the steam can be distributed more quickly and evenly. It should be noted that the blocking portion 200 can also be other structures, for example, it can be a flat plate structure, as long as it can prevent the steam from spraying directly onto the cable.
[0044] In some embodiments of the present invention, Figure 2 and Figure 5As shown, both ends of the tube body 100 are provided with steam inlet holes 102, and two blocking parts 200 are correspondingly arranged and located at both ends of the tube body 100. The edges of the two blocking parts 200 at the opposite ends are sealed and connected to the inner side wall of the tube body 100, and the outer diameter of the other ends of the two blocking parts 200 gradually increases along the middle position of the length direction of the tube body 100. The edges of the two blocking parts 200 at the opposite ends are sealed and connected to the inner side wall of the tube body 100, so that after the steam enters from the steam inlet holes 102, it only flows toward the middle position of the length direction of the tube body 100, so that the steam can quickly fill the entire vulcanization chamber 101. In addition, the outer diameter of the other ends of the two blocking parts 200 gradually increases along the middle position of the length direction of the tube body 100, so that the steam can be guided, so that when the steam flows toward the middle position of the length direction of the tube body 100, it can further avoid the steam from directly spraying onto the cable.
[0045] In some embodiments of the present invention, Figures 2 to 4 As shown, the pipe body 100 includes a plurality of unit pipes 103, and a connecting pipe 104 is provided between two adjacent unit pipes 103. Specifically, the two adjacent unit pipes 103 are defined as a first pipe and a second pipe, respectively. One end of the connecting pipe 104 is connected to the first pipe through a flange, and the other end of the connecting pipe 104 is connected to the second pipe. After the connecting pipe 104 is separated from the first pipe, the connecting pipe 104 can be moved and adjusted along the axial direction of the second pipe. A guiding mechanism 300 for guiding the cable is provided in the connecting pipe 104. The guiding mechanism 300 is used to guide the cable to prevent the cable from contacting the inner wall of the pipe body 100 and causing wear, and at the same time, the vulcanization effect of the cable is better. However, the pipe body 100 of the vulcanization pipeline is relatively long, and it is inconvenient for the cable to pass through the guiding mechanism 300 when the cable first passes through the pipe body 100. In this embodiment, when the cable needs to pass through the guide mechanism 300, the connecting tube 104 is disassembled from the first tube, and then the connecting tube 104 is moved in a direction away from the first tube, so that there is an operating space between the connecting tube 104 and the first tube, so that it is convenient for the staff to reach into the connecting tube 104 and pass the cable through the guide mechanism 300. After the cable passes through the guide mechanism 300, the connecting tube 104 can be reconnected to the first tube through the flange.
[0046] It should be noted that one end of the connecting pipe 104 is connected to the first pipe via a flange, that is, the ends of the connecting pipe 104 close to the first pipe are both provided with flanges, and the two flanges are connected by multiple bolts. In order to improve the sealing between the two flanges, a sealing gasket can be provided between the two flanges.
[0047] In some embodiments of the present invention, Figure 3 and Figure 4As shown, the inner wall of the second tube close to the connecting tube 104 is provided with a first annular sealing plate 105 along the circumferential direction, the end of the connecting tube 104 away from the first tube is inserted into the second tube, and the outer wall of the connecting tube 104 away from the first tube is provided with a second annular sealing plate 106 along the circumferential direction, and an annular sealing gasket 107 is provided between the first annular sealing plate 105 and the second annular sealing plate 106. The first annular sealing plate 105 and the second annular sealing plate 106 press the annular sealing gasket 107 tightly, thereby playing a sealing role. At the same time, since the end of the connecting tube 104 away from the first tube is inserted into the second tube, when the connecting tube 104 is separated from the first tube, the connecting tube 104 can be moved and adjusted along the axial direction of the second tube.
[0048] It should be noted that the connecting tube 104 and the second tube may also be connected in other ways. For example, the connecting tube 104 may be sleeved with the second tube, or an external thread may be provided on the outer wall of the connecting tube 104 and an internal thread may be provided on the inner wall of the second tube. The connecting tube 104 and the second tube are threadedly connected. Rotating the connecting tube 104 can also move the connecting tube 104.
[0049] In some embodiments of the present invention, Figure 3 , Figure 4 as well as Figure 8 As shown, the guide mechanism 300 includes two guide rollers 301 arranged up and down, the two guide rollers 301 are arranged horizontally and parallel to each other, and the outer wall of the guide roller 301 is provided with an annular recess 302 along the circumferential direction, and a limiting space for the cable to pass through is formed between the two annular recesses 302. When the cable passes through the limiting space, the two guide rollers 301 cooperate with each other to guide the cable to avoid deviation when the cable moves. Moreover, the guide roller 301 can rotate, thereby reducing the friction on the cable.
[0050] It should be noted that the axis of the guide roller 301 can be perpendicular to the axial direction of the connecting tube 104 for easy guidance. The guide mechanism 300 can also be other structures, for example, only one guide roller 301 can be provided, or multiple guide rollers 301 can be provided. In addition, the guide mechanism 300 can also be a guide ring.
[0051] In some embodiments of the present invention, Figures 5 to 7As shown, both ends of the tube body 100 are detachably provided with rubber sealing plates 108, and the rubber sealing plates 108 are provided with first avoidance holes 109 for cables to pass through. The rubber sealing plates 108 seal the vulcanization chamber 101 to prevent the steam in the vulcanization chamber 101 from escaping. The first avoidance hole 109 is for the cable to pass through, and the aperture size of the first avoidance hole 109 can be adapted to the outer diameter size of the cable, thereby further preventing the steam in the vulcanization chamber 101 from escaping. The rubber sealing plate 108 is made of rubber material, thereby reducing the wear on the cable. The rubber sealing plate 108 can be disassembled, thereby facilitating the cleaning, maintenance or replacement of the rubber sealing plate 108, for example, replacing the first avoidance holes 109 of different sizes. It should be noted that the rubber sealing plate 108 can be made of high temperature resistant rubber to reduce the damage of the rubber sealing plate 108 caused by high temperature, thereby increasing the service life of the rubber sealing plate 108.
[0052] In some embodiments of the present invention, Figures 5 to 7 As shown, both ends of the tube body 100 are provided with end plates 110, and the end plates 110 are provided with second avoidance holes 111 for cables to pass through. The end surface of the end plate 110 away from the vulcanization chamber 101 is provided with a sink 112, and the rubber sealing plate 108 is installed in the sink 112 in cooperation. The sink 112 is detachably provided with an annular pressing plate 113 on the side of the rubber sealing plate 108 away from the vulcanization chamber 101, and the annular pressing plate 113 is attached to the rubber sealing plate 108. The rubber sealing plate 108 can be installed by the cooperation of the annular pressing plate 113 and the end plate 110. When the rubber sealing plate 108 needs to be removed, the annular pressing plate 113 can be removed. In addition, the end surface is provided to reduce the pressure of the steam on the rubber sealing plate 108, so that the installation of the rubber sealing plate 108 is more stable and the service life is longer.
[0053] In some embodiments of the present invention, Figures 5 to 7 As shown, the annular pressure plate 113 is provided with a mounting block 114 along the circumferential direction, and the mounting block 114 is located on the side of the end plate 110 away from the vulcanization chamber 101 and is bolted to the end plate 110. Specifically, the mounting block 114 is provided with a through hole, and the end plate 110 is provided with a threaded hole. The bolt passes through the through hole and is threadedly connected with the threaded hole, thereby achieving the fixation of the mounting block 114, thereby achieving the installation of the annular pressure plate 113. Of course, the annular pressure plate 113 can also have other installation methods. For example, when the sink 112 is circular and the annular pressure plate 113 is correspondingly circular, the outer wall of the annular pressure plate 113 can be provided with an external thread, and the inner wall of the sink 112 can be provided with an internal thread, and the outer wall of the annular pressure plate 113 is threadedly connected with the inner wall of the sink 112.
[0054] In some embodiments of the present invention, Figures 5 to 7As shown, the sink 112 is circular, and the annular pressure plate 113 is correspondingly circular, so that the annular pressure plate 113 can rotate when the mounting block 114 is separated from the end plate 110. The end surface of the end plate 110 facing away from the vulcanization chamber 101 corresponds to the mounting block 114 and is provided with a locking plate 115. The locking plate 115 is parallel to the end plate 110 and a locking groove is formed between the end plate 110. The mounting block 114 is installed in the locking groove. When the annular pressure plate 113 rotates, all the mounting blocks 114 can be moved out from the same side of the locking groove. The locking plate 115 can be connected to the end face of the end plate 110 away from the vulcanization chamber 101 through a connecting plate. The locking plate 115 is also provided with a through hole. When the annular pressure plate 113 is installed, the annular pressure plate 113 is extended into the sink 112, and then the annular pressure plate 113 is rotated to move the mounting block 114 into the corresponding locking groove, and then the through hole on the locking plate 115, the through hole on the mounting block 114 and the threaded hole on the end plate 110 are aligned, and then the bolts can be installed. In this embodiment, the locking plate 115 is provided, and even if the bolts are loose, the locking plate 115 can abut against the annular pressure plate 113 to prevent the annular pressure plate 113 from separating from the rubber sealing plate 108, so that the installation of the annular pressure plate 113 and the rubber sealing plate 108 is more stable.
[0055] The embodiments of the present invention are described in detail above with reference to the accompanying drawings, but the present invention is not limited to the above embodiments, and various changes can be made within the knowledge scope of ordinary technicians in the relevant technical field without departing from the purpose of the present invention.
Claims
1. A vulcanized pipe, characterized in that: include: A tube body, wherein a vulcanization cavity is formed in the tube body, and a steam inlet hole communicating with the vulcanization cavity is provided on a side wall of the tube body; A blocking portion, arranged in the vulcanization chamber corresponding to the steam inlet hole, wherein at least a portion of the blocking portion is located between the steam inlet hole and the axis of the tube body; The tube body includes a plurality of unit tubes, and a connecting tube is provided between two adjacent unit tubes. Specifically, the two adjacent unit tubes are respectively defined as a first tube and a second tube, one end of the connecting tube is connected to the first tube via a flange, and the other end of the connecting tube is connected to the second tube, and after the connecting tube is separated from the first tube, the connecting tube can be moved and adjusted along the axial direction of the second tube, and a guiding mechanism for guiding the cable is provided in the connecting tube.
2. The vulcanized pipe according to claim 1, characterized in that: The cross section of the blocking portion along the axial direction of the tube body is in a circular ring shape, and the center lines of all the cross sections of the blocking portion coincide with the axis of the tube body.
3. The vulcanized pipe according to claim 2, characterized in that: The steam inlet holes are provided at both ends of the tube body, and two blocking parts are correspondingly provided and located at both ends of the tube body. The edges of the two blocking parts at one end opposite to each other are sealed and connected to the inner wall of the tube body, and the outer diameters of the other ends of the two blocking parts gradually increase along the middle position close to the length direction of the tube body.
4. The vulcanized pipe according to any one of claims 1 to 3, characterized in that: A first annular sealing plate is circumferentially provided on the inner wall of one end of the second tube close to the connecting tube, one end of the connecting tube away from the first tube is inserted into the second tube, and a second annular sealing plate is circumferentially provided on the outer wall of one end of the connecting tube away from the first tube, and an annular sealing gasket is provided between the first annular sealing plate and the second annular sealing plate.
5. The vulcanized pipe according to any one of claims 1 to 3, characterized in that: The guide mechanism comprises two guide rollers arranged up and down, the two guide rollers are arranged horizontally and parallel to each other, the outer side wall of the guide roller is provided with an annular recess along the circumferential direction, and a limiting space for the cable to pass through is formed between the two annular recesses.
6. The vulcanized pipe according to any one of claims 1 to 3, characterized in that: Both ends of the tube body are detachably provided with rubber sealing plates, and the rubber sealing plates are provided with first avoidance holes for cables to pass through.
7. The vulcanized pipe according to claim 6, characterized in that: End plates are provided at both ends of the tube body, and the end plates are provided with second avoidance holes for cables to pass through. The end surface of the end plate facing away from the vulcanization chamber is provided with a sinking platform, and the rubber sealing plate is installed in the sinking platform. The sinking platform is detachably provided with an annular pressure plate on the side of the rubber sealing plate facing away from the vulcanization chamber, and the annular pressure plate is attached to the rubber sealing plate.
8. The vulcanized pipe according to claim 7, characterized in that: The annular pressure plate is provided with a mounting block along the circumferential direction. The mounting block is located at a side of the end plate away from the vulcanization chamber and is bolted to the end plate.
9. The vulcanized pipe according to claim 8, characterized in that: The sink is circular, and the annular pressure plate is correspondingly in a circular ring shape, so that the annular pressure plate can rotate when the mounting block is separated from the end plate. The end surface of the end plate facing away from the vulcanization chamber is provided with a locking plate corresponding to the mounting block. The locking plate is parallel to the end plate and a locking groove is formed between the locking plate and the end plate. The mounting block is installed in the locking groove. When the annular pressure plate rotates, all the mounting blocks can be moved out from the same side of the locking groove.
Citation Information
Patent Citations
Process for curing a porous muffler preform
CN102497964A
Vulcanization system with air pressure speed-limiting balance function
CN215825748U