Exhaust device for annealing of ultra-clean type seamless stainless steel pipe

Abstract

The utility model discloses a kind of exhaust devices for ultra-clean seamless stainless steel pipe annealing, including shunt box, with one air inlet pipe and multiple butt pipes being interconnected, the axial center of each butt pipe is parallel to each other, and array distribution is on the same side side wall of shunt box, butt pipe and pipe body front end plug-in cooperation;End cap, detachably set in the end of pipe body;Line-up mechanism, each pipe body is interconnected with line-up mechanism, to realize the orderly distribution between each pipe body.The utility model is butt jointed with one end of butt pipe and stainless steel pipe, hydrogen can be injected into each pipe body inside through air inlet pipe after, hydrogen replaces air inside stainless steel pipe, when replacement is completed, the other end of stainless steel pipe is sealed by end cap, then stainless steel pipe is sent into annealing device inside and is annealed;It can reduce the air volume brought into annealing device inside by stainless steel pipe, and then reduce the reaction of hydrogen and flue gas during annealing, improve stainless steel pipe annealing effect.

Description

Technical Field

[0001] This utility model belongs to the field of stainless steel pipe processing technology, and in particular relates to an exhaust device for annealing ultra-clean seamless stainless steel pipes. Background Technology

[0002] Annealing is a heat treatment process widely used in the production of metal materials such as stainless steel seamless pipes. This process primarily uses heating and holding at a certain temperature to induce recrystallization of the internal structure of the metal material, thereby eliminating internal stress, improving plasticity and toughness, and optimizing the microstructure.

[0003] When annealing seamless stainless steel pipes, hydrogen gas is introduced into the annealing apparatus to prevent oxidation of the stainless steel at high temperatures. However, in existing annealing apparatuses, air is introduced along with the pipe. The oxygen and hydrogen in the air react with the hydrogen at high temperatures to produce water. This water vaporizes at high temperatures, absorbing heat and affecting the annealing temperature and the annealing effect. Furthermore, the water corrodes the seamless stainless steel pipe, reducing the quality of the finished product.

[0004] Therefore, how to remove oxygen from the inside of stainless steel tubes before annealing is an urgent problem to be solved. Utility Model Content

[0005] The purpose of this invention is to overcome the defects in the existing technology and provide an exhaust device for annealing ultra-clean seamless stainless steel pipes, which improves the annealing effect of stainless steel pipes.

[0006] To achieve the above objectives, the specific technical solution of the exhaust device for annealing ultra-clean seamless stainless steel tubes of this utility model is as follows: An exhaust device for annealing ultra-clean seamless stainless steel tubes includes a distribution box with an inlet pipe and multiple connecting pipes that are interconnected. The centerlines of the connecting pipes are parallel to each other and are arranged in an array on the same side wall of the distribution box. The connecting pipes are inserted into the front end of the tube body. An end cap is detachably disposed at the end of the tube body. An aligning mechanism is connected to each tube body to achieve an orderly distribution among the tube bodies.

[0007] Preferably, the intake pipe is threaded with a sealing cap, and the connecting pipe has a tapered structure.

[0008] Preferably, the alignment mechanism includes a positioning seat, which has multiple slots for the tubes to enter, and the number of slots corresponds to the number of connecting tubes.

[0009] Preferably, the positioning seat is provided with an annular binding strap on its outer periphery, and the tube body is fixed in the slot by the binding strap.

[0010] Preferably, the positioning seat has a limiting groove circumferentially formed on its outer periphery, and the binding strap is circumferentially disposed inside the limiting groove.

[0011] Preferably, both ends of the binding strap are fixedly connected to a connecting seat, and the two connecting seats are connected to each other by a second bolt.

[0012] Preferably, at least two alignment mechanisms are provided, and an adjustment assembly is provided between the diverter box and one of the adjacent alignment mechanisms.

[0013] Preferably, both ends of the distributor box are provided with adjustment components. The adjustment components include a flange portion fixedly connected to the distributor box and an opening portion fixedly connected to the positioning seat. The flange portion has a waist-shaped groove, and a first bolt passes through the waist-shaped groove. The first bolt is threadedly connected to the opening portion.

[0014] Preferably, a hollow sealing plug is slidably disposed inside the tube body, and an installation groove is provided on the outer periphery of the sealing plug. A sealing ring is provided on the inner periphery of the installation groove, and the sealing ring is sealed and fitted to the inner wall of the tube body.

[0015] The exhaust device for annealing ultra-clean seamless stainless steel tubes of this utility model has the following advantages: After the connecting pipe is connected to one end of the stainless steel tube, hydrogen can be injected into each tube through the air inlet pipe. The hydrogen replaces the air inside the stainless steel tube. After the replacement is completed, the other end of the stainless steel tube is sealed by the end cap, and then the stainless steel tube is sent into the annealing device for annealing. This can reduce the amount of air brought into the annealing device by the stainless steel tube, thereby reducing the reaction between hydrogen and flue gas during annealing and improving the annealing effect of the stainless steel tube. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the exhaust device of this utility model; Figure 2 This is a schematic diagram of the connection structure between the diversion box and the positioning seat of this utility model; Figure 3 This is a schematic diagram of the structure of the flow divider box of this utility model; Figure 4 This is a schematic diagram of the positioning seat of this utility model; Figure 5 This is a schematic diagram of the binding strap of this utility model; Figure 6 This is a schematic diagram of the sealing plug of this utility model; The markings in the diagram are as follows: 1. Diverter box; 2. Positioning seat; 3. Pipe body; 4. Binding strap; 5. End cap; 6. First bolt; 7. Sealing plug; 101. Flange; 102. Connecting pipe; 103. Sealing cap; 104. Waist-shaped groove; 105. Inlet pipe; 201. Slot; 202. Limiting groove; 203. Opening; 401. Connecting seat; 402. Second bolt; 501. Locking screw; 701. Mounting groove; 702. Sealing ring. Detailed Implementation

[0017] The specific embodiments of this utility model will be further described below with reference to the accompanying drawings and examples. The following examples are only used to more clearly illustrate the technical solution of this utility model and should not be construed as limiting the scope of protection of this utility model.

[0018] The terms "top surface," "bottom surface," and "full surface" are used with reference to the normal operating state of the exhaust device and are only for the convenience of describing this utility model and simplifying the description. They do not indicate or imply that the device or component referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0019] like Figure 1 , 3 As shown in Figure 6, an exhaust device for annealing ultra-clean seamless stainless steel tubes includes a distribution box 1, which has an inlet pipe 105 and multiple connecting pipes 102 that are interconnected. The centerlines of each connecting pipe 102 are parallel to each other and are arranged in an array on the same side wall of the distribution box 1. The connecting pipes 102 are inserted into the front end of the tube body 3. An end cap 5 is detachably installed at the end of the tube body 3. An aligning mechanism is connected to each tube body 3 to achieve an orderly distribution among the tube bodies 3.

[0020] The aforementioned exhaust device is used to replace the air inside the stainless steel tube with a hydrogen protective atmosphere consistent with that inside the annealing device before annealing. This reduces the amount of air carried into the annealing device by the stainless steel tube, reduces the reaction between the hydrogen atmosphere inside the annealing device and the oxygen in the air, thereby reducing water production and mitigating the impact of water on the stainless steel tube, thus improving the annealing effect of the stainless steel tube.

[0021] The operation is as follows: First, connect the front end of the stainless steel tube body 3 to each connecting pipe 102. When connecting, simply insert the connecting pipe 102 tightly into the tube body 3. Then, connect an external hydrogen source to the inlet pipe 105 and continuously inject hydrogen into the distribution box 1. After that, the hydrogen enters the interior of each tube body 3 through each connecting pipe 102. By continuously injecting hydrogen for a set time, a large amount of hydrogen can squeeze the air inside the tube body 3 out from the end of the tube body 3, thereby replacing the air inside the tube body 3 with hydrogen. Then, cover the end cap 5 to the end of the tube body 3, stop the hydrogen filling, and cover the inlet pipe 105 with the sealing cap 103. In this way, both ends of the tube body 3 can be sealed to prevent air from re-entering the interior of the tube body 3. Then, send the interconnected distribution box 1, tube body 3 and end cap 5 into the annealing device for annealing treatment to improve the annealing effect of the stainless steel tube.

[0022] Further improvements include, for example Figure 3 As shown, the intake pipe 105 is threadedly connected to a sealing cap 103, and the connecting pipe 102 has a conical structure. The sealing cap 103 is threadedly connected to the intake pipe 105, which facilitates the installation and removal of the sealing cap 103; the conical connecting pipe 102 has different outer diameters at various parts, which can be used to connect and tighten with stainless steel pipes of different inner diameters, so as to effectively improve the sealing effect after the connecting pipe 102 is connected to the pipe body 3.

[0023] Further improvements include, for example Figure 2 , 4 As shown in Figure 5, the alignment mechanism includes a positioning seat 2, which has multiple slots 201 for the tube body 3 to enter. The number of slots 201 is consistent with the number of connecting tubes 102 and corresponds one-to-one. A ring-shaped binding strap 4 is provided on the outer periphery of the positioning seat 2, and the tube body 3 is fixed in the slots 201 by the binding strap 4.

[0024] Specifically, the slot 201 extends axially along the connecting tube 102, and its opening is located at the edge of the positioning seat 2 and communicates with the outside, which facilitates the entry and exit of the tube 3 into the slot 201. The slot 201 is used to position the tube 3. By setting multiple positioning seats 2 at different positions of the tube 3, the tubes 3 can be arranged parallel to each other and in an orderly manner, and a certain gap can be maintained between adjacent tubes 3. This allows the tube 3 to be stably connected with the corresponding connecting tube 102, which facilitates the inflation of the tube 3 and can also improve the uniformity of heating during the annealing process of the tube 3, further improving the annealing effect of the tube 3. The binding strap 4 can apply a force towards the inside of the slot 210 to the tube 3, thereby pressing the tube 3 tightly inside the slot 201, improving the stability of the connection between the tube 3 and the positioning seat 2, and ultimately improving the stability of the positioning between the tubes 3.

[0025] Further improvements include, for example Figure 4 As shown, a limiting groove 202 is formed on the outer periphery of the positioning seat 2, and the binding strap 4 is circumferentially disposed inside the limiting groove 202. The limiting groove 202 can limit the binding strap 4, prevent relative sliding between the binding strap 4 and the positioning seat 2, thereby improving the firmness of the connection between the two, and ultimately improving the stability of the positioning of each tube 3 by the binding strap 4 and the positioning seat 2; and after the binding strap 4 is inserted into the limiting groove 202, the distance between the binding strap 4 and the bottom of the slot 201 can be reduced, so that the binding strap 4 can be tightly abutted against the tube 3 inside the slot 201, so that the tube 3 is firmly pressed into the slot 201, further improving the stability of the positioning of the tube 3.

[0026] Further improvements include, for example Figure 5 As shown, both ends of the binding strap 4 are fixedly connected to connecting seats 401, and the two connecting seats 401 are connected to each other by a second bolt 402. Specifically, the connecting seat 401 and the binding strap 4 are integrally formed. One of the two connecting seats 401 has an opening, and the other has a threaded hole. The opening and the threaded hole are coaxially arranged. The second bolt 402 passes through the opening and is threadedly connected to the threaded hole. In this way, the distance between the two connecting seats 401 can be adjusted by the second bolt 402, thereby adjusting the tightness of the binding strap 4 binding the tube body 3. This facilitates the assembly and disassembly of the binding strap 4 and improves the ease of assembly and disassembly between the tube body 3 and the positioning seat 2.

[0027] Further improvements include, for example Figure 1-4 As shown, at least two alignment mechanisms are provided. An adjustment assembly is provided between the diverter box 1 and an adjacent alignment mechanism. An adjustment assembly is provided at both ends of the diverter box 1. The adjustment assembly includes a flange portion 101 fixedly connected to the diverter box 1 and an opening portion 203 fixedly connected to the positioning seat 2. The opening portion 203 has an internal thread. The flange portion 101 has a waist-shaped groove 104. A first bolt 6 passes through the waist-shaped groove 104 and is threadedly connected to the opening portion 203.

[0028] Specifically, the first bolt 6 passes through the waist-shaped groove 104 and is threaded to the opening 203. In this way, the distance between the positioning seat 2 and the diversion box 1 can be adjusted by the first bolt 6. The first bolt 6 can move along the extension direction of the waist-shaped groove 104, thereby adjusting the relative position between the positioning seat 2 and the diversion box 1 along the extension direction of the waist-shaped groove 104, so as to facilitate the docking connection between the pipe body 3 and the connecting pipe 102.

[0029] When using the above-mentioned exhaust device, firstly, each pipe body 3 is connected to multiple positioning seats 2. The multiple positioning seats 2 are evenly distributed along the axial direction of the pipe body 3. Then, binding straps 4 are set on each positioning seat 2. The binding straps 4 are thin metal sheets that can effectively withstand the high temperature inside the annealing device. The binding straps 4 are pre-tightened. After pre-tightening, the pipe body 3 can still move along the axial direction inside the slot 201, but will not detach from the slot 201. Then, a diversion box 1 is set up, and each pipe body 3 is connected to each connecting pipe 102. The adjacent positioning seats 2 and diversion box 1 are connected by the first bolt 6. The first bolt 6 is tightened to bring the positioning seats 2 and diversion box 1 closer to each other, so that the end of the pipe body 3 and the connecting pipe 102 are pressed together to achieve a certain sealing effect. Then, the binding straps 4 are tightened to finally fix the pipe body 3, and at the same time, the diversion box 1 and the pipe body 3 are fixed together. Hydrogen gas is then introduced to replace the air inside the tube body 3, and finally the end cap 5 covers the end of the tube body 3. This completes the replacement of the air inside the tube body 3 and the sealing of both ends of the tube body 3, preventing air from re-entering the tube body 3. When the tube body 3 is subsequently sent into the annealing device, the amount of air brought into the annealing device can be reduced, improving the annealing effect on the stainless steel tube. In the above-mentioned exhaust device, the end cap 5 completely covers the end of the tube body 3 and is threaded with locking screws 501. The locking screws 501 are distributed radially along the tube body 3. After tightening the locking screws 501, the end cap 5 and the end of the tube body 3 can be fixedly connected. The inner bottom wall of the end cap 5 is tightly fitted with the end face of the tube body 3 to achieve a sealed connection between the two. Similarly, the connecting pipe 102 is tightly fitted with the end of the tube body 3 to achieve a sealed connection between the two, ultimately achieving the sealing effect of the tube body 3.

[0030] Further improvements include, for example Figure 6 As shown, a hollow sealing plug 7 is slidably disposed inside the tube body 3. An installation groove 701 is provided on the outer periphery of the sealing plug 7, and a sealing ring 702 is provided on the inner periphery of the installation groove 701. The sealing ring 702 is sealed and fitted to the inner wall of the tube body 3.

[0031] It is not possible to effectively observe with the naked eye whether the air inside the tube 3 has been completely replaced; therefore, a sealing plug 7 is installed inside the tube 3, and a sealing ring 702 is used to seal the tube 3 and the sealing plug 7. When in use, the sealing plug 7 is first placed at the front end of the tube 3, that is, the end closest to the distributor box 1. When hydrogen is injected, the gas pressure pushes the sealing plug 7 to slide towards the end of the tube 3. At this time, the side of the sealing plug 7 closest to the front end of the tube 3 is hydrogen, and the other side is air. When the sealing plug 7 slides out from the end of the tube 3, the air replacement inside the tube 3 is completed. At this time, the end cap 5 can be closed, and the sealing plug 7 can be removed for the next use.

[0032] It is understood that this utility model has been described through some embodiments, and those skilled in the art will recognize that various changes or equivalent substitutions can be made to these features and embodiments without departing from the spirit and scope of this utility model. Furthermore, under the teachings of this utility model, these features and embodiments can be modified to adapt to specific situations and materials without departing from the spirit and scope of this utility model. Therefore, this utility model is not limited to the specific embodiments disclosed herein, and all embodiments falling within the scope of the claims of this application are protected by this utility model.

Claims

1. An exhaust device for annealing ultra-clean seamless stainless steel pipes, characterized in that, include: The split box (1) has an intake pipe (105) and multiple connecting pipes (102) that are interconnected. The center lines of each connecting pipe (102) are parallel to each other and are arranged in an array on the same side wall of the split box (1). The connecting pipes (102) are inserted into the front end of the pipe body (3). End cap (5) is detachably disposed at the end of the tube body (3); The alignment mechanism is such that each tube (3) is connected to the alignment mechanism to achieve an orderly distribution among the tubes (3).

2. The exhaust device for annealing ultra-clean seamless stainless steel tubes according to claim 1, characterized in that, The intake pipe (105) is threadedly connected to a sealing cap (103), and the connecting pipe (102) has a conical structure.

3. The exhaust device for annealing ultra-clean seamless stainless steel tubes according to claim 1, characterized in that, The alignment mechanism includes a positioning seat (2), which has multiple slots (201) for the tube body (3) to enter. The number of slots (201) is consistent with the number of connecting tubes (102) and corresponds one-to-one.

4. The exhaust device for annealing ultra-clean seamless stainless steel tubes according to claim 3, characterized in that, The positioning seat (2) is provided with an annular binding strap (4) on its outer periphery, and the tube (3) is fixed in the slot (201) by the binding strap (4).

5. The exhaust device for annealing ultra-clean seamless stainless steel tubes according to claim 4, characterized in that, The positioning seat (2) has a circumferentially circumferentially oriented limiting groove (202), and the binding strap (4) is circumferentially disposed inside the limiting groove (202).

6. The exhaust device for annealing ultra-clean seamless stainless steel tubes according to claim 4, characterized in that, Both ends of the binding strap (4) are fixedly connected to a connecting seat (401), and the two connecting seats (401) are connected to each other by a second bolt (402).

7. The exhaust device for annealing ultra-clean seamless stainless steel tubes according to claim 3, characterized in that, The alignment mechanism is provided in at least two parts, and an adjustment component is provided between the diverter box (1) and one of the alignment mechanisms adjacent to it.

8. The exhaust device for annealing ultra-clean seamless stainless steel tubes according to claim 7, characterized in that, Both ends of the diverter box (1) are provided with a distance adjustment assembly. The distance adjustment assembly includes a flange (101) fixedly connected to the diverter box (1) and an opening (203) fixedly connected to the positioning seat (2). The flange (101) is provided with a waist-shaped groove (104). A first bolt (6) passes through the waist-shaped groove (104). The first bolt (6) is threadedly connected to the opening (203).

9. The exhaust device for annealing ultra-clean seamless stainless steel tubes according to claim 1, characterized in that, A hollow sealing plug (7) is slidably disposed inside the tube body (3). An installation groove (701) is provided on the outer periphery of the sealing plug (7). A sealing ring (702) is provided on the inner periphery of the installation groove (701). The sealing ring (702) is sealed and fitted to the inner wall of the tube body (3).

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