A connection structure and a furnace observation device

Abstract

The present application provides a connection structure and a furnace observation device. The connection structure is installed at the tail end of the outer sleeve and is used to fix the observation gun and seal the gap between the observation gun and the outer sleeve. The connection structure includes a sealing sleeve. The sealing sleeve includes: a base, one or more sealing rings, an elastic pressing ring, a pressing ring, and a tightening locking ring. During assembly, the pressing ring is placed inside the tail end of the base, and its bottom surface presses the elastic pressing ring from both sides against the side surface of the first annular step portion of the base. The elastic pressing ring has an interference fit with the observation gun. By holding the observation gun tightly, the observation gun and the outer sleeve are relatively fixed. The advantages of the present application are as follows: Through the combined action of the sealing ring, the elastic pressing ring, and the positioning ring, the observation gun and the outer sleeve can be hermetically and fixedly connected. At the same time, when separation is required, the observation gun can be conveniently withdrawn from the outer sleeve, and high-pressure dust or gas leakage can be prevented during the withdrawal process.

Description

Technical Field

[0001] This application belongs to the field of mechanical seals, and particularly relates to a connection structure and a furnace observation device. Background Art

[0002] Closed industrial furnaces such as blast furnaces have an in-furnace environment with high temperature, high pressure, and high dust. Therefore, it is difficult to observe through the observation window with the human eye. For this reason, various detection devices have been proposed to obtain in-furnace information, such as infrared cameras and microwave scanners. Some of these detection devices are arranged outside the furnace shell and transmit and / or receive detection signals through the observation window, but this will be hindered by the easy ash formation on the observation window. Therefore, it is envisaged to arrange detection elements such as cameras and other sensors inside the furnace.

[0003] Chinese Patent No. CN1156149C discloses an insertable furnace camera for observing the inside of a furnace, which includes a camera gun, a tube cooler, a sealing valve, and a sealing sleeve (connection structure). A camera and a temperature measuring element are installed at the front end of the camera gun. The camera gun passes through the sealing sleeve and the sealing valve until it reaches the front end of the tube cooler, so that the camera and the temperature measuring element at the front end of the camera gun are located inside the blast furnace. Since the camera gun is sealed by two seals, namely the sealing sleeve and the sealing valve, during the production process of the blast furnace, when the camera gun is pulled out between the sealing valve and the sealing sleeve, the sealing valve can be closed, and then the camera gun can be pulled out of the sealing sleeve for maintenance and repair. During the process of pulling the camera gun out of the sealing sleeve, the sealing performance should also be maintained as much as possible to prevent the leakage of high-pressure flue gas or dust inside the furnace.

[0004] Chinese Patent Application Publication No. CN118655696A proposes a laser scanning device, which may include a laser gun and the outer sleeve into which it is inserted. This laser scanning device can be installed on an industrial furnace such as a blast furnace, with its head end extending into the furnace and the tail end located outside the furnace, and the laser emitted from the head end can be scanned inside the furnace to obtain in-furnace information. The laser gun is used to transmit the laser generated by the laser generator outside the furnace into the furnace. The outer sleeve can protect the laser gun and make it adapt to the harsh in-furnace environment, and the outer sleeve can also provide other auxiliary and support functions. In one embodiment of the laser gun, the laser transmission line extends inside the long gun barrel of the laser gun and is used to transmit the laser. After being collimated by a collimating mirror, it is reflected into the furnace through a reflecting mirror. The reflecting mirror frame with the reflecting mirror is driven by a motor drive assembly to rotate within a predetermined scanning angle range for scanning operations. This application relates to changes and / or improvements to the laser scanning device in this Chinese patent application. Therefore, the entire content of this patent application is hereby incorporated into this specification for reference. Summary of the Invention

[0005] The object of the present application is to overcome the defect in the prior art that the connection between the observation gun and the outer sleeve cannot meet the requirements of both sealing and fixing and convenient disassembly.

[0006] To achieve the above object, the present application proposes a connection structure, which is installed at the tail end of the outer sleeve and is used to fix the observation gun and seal the gap between the observation gun and the outer sleeve; the connection structure includes a sealing sleeve.

[0007] The sealing sleeve includes:

[0008] A base, which has a through channel that allows the observation gun to pass through; the head end of the base is integrally formed with the tail end of the outer sleeve, or fixedly and detachably connected; the middle part of the base has a first annular step portion protruding inwards; the inner side surface of the first annular step portion has one or more annular grooves; the axis of the annular groove is collinear with the axis of the base.

[0009] One or more sealing rings, which are annular rubber rings and are embedded one by one into the annular grooves of the first annular step portion.

[0010] An elastic pressing ring, which is an annular rubber ring and has a rectangular or square cross-section; the elastic pressing ring can be sleeved on the observation gun and can enter the base and abut against the first annular step portion during assembly.

[0011] A pressing ring, which is a hollow columnar structure; the pressing ring enters the inside of the base and presses against the elastic pressing ring during assembly; and

[0012] A pressing lock ring, whose head end can be detachably connected to the tail end of the base; a second annular step portion suitable for abutting against the pressing ring is formed inside the tail end of the pressing lock ring.

[0013] Wherein, during assembly, the pressing ring is placed inside the tail end of the base, and its bottom surface and the side surface of the first annular step portion of the base press the elastic pressing ring from both sides.

[0014] As an improvement of the above connection structure, the end face of the pressing ring in contact with the elastic pressing ring is an inclined plane inclined inwards.

[0015] The side surface of the first annular step portion of the base in contact with the elastic pressing ring is a side surface inclined towards the middle of the first annular step portion.

[0016] As an improvement of the above connection structure, the cross-section of the sealing ring is circular or oval.

[0017] As an improvement of the above connection structure, the connection method of the head end of the base and the tail end of the outer sleeve, which is fixedly and detachably connected, is a threaded connection.

[0018] As an improvement to the above connection structure, the tail end of the pressing lock ring has an external thread;

[0019] The sealing sleeve further includes:

[0020] A limiting lock ring, having a through-channel that allows the observation gun to pass through, and a third annular step portion protruding inward at the tail end; and

[0021] A positioning ring, which is an annular structure; one or more second through-holes are provided on the side surface of the positioning ring, and internal threads are provided in the second through-holes;

[0022] Wherein, during assembly, the positioning ring is sleeved on the observation gun, adjacent to the tail end of the pressing lock ring; the set screw passes through the second through-hole and is used to tightly press the observation gun; the head end of the limiting lock ring accommodates the positioning ring and is detachably connected to the tail end of the pressing lock ring.

[0023] As an improvement to the above connection structure, the positioning ring has internal threads and is threadedly connected to the external threads at the corresponding position on the observation gun.

[0024] As an improvement to the above connection structure, the middle section of the outer ring side surface of the pressing ring has an annular groove;

[0025] One or more first through-holes penetrating the side wall are provided at the tail end of the base; the set screw passes through the first through-hole and extends into the interior of the base, so that the head of the set screw is located in the groove of the pressing ring.

[0026] As an improvement to the above connection structure, the connection structure further includes an anti-rotation mechanism;

[0027] The anti-rotation mechanism includes:

[0028] A cylindrical fixed insertion rod; both ends of the fixed insertion rod have stop structures;

[0029] A first anti-rotation fixed clip and a second anti-rotation fixed clip with the same structure; both the first anti-rotation fixed clip and the second anti-rotation fixed clip include:

[0030] A first half-ring and a second half-ring that can be combined into an annular structure through a detachable connection member; and

[0031] An insertion rod ring, which is an annular structure and allows the fixed insertion rod to be inserted into the annular structure; the insertion rod ring is fixed on the outer wall of the second half-ring; the axis of the insertion rod ring is parallel to the axis of the annular structure formed by the combination of the first half-ring and the second half-ring;

[0032] During assembly, the annular structure formed by combining the first half-ring and the second half-ring of the first anti-rotation fixing clip is sleeved on the observation gun, and the first anti-rotation fixing clip is fixedly connected to the observation gun through a detachable connection member; the annular structure formed by combining the first half-ring and the second half-ring of the second anti-rotation fixing clip is sleeved on the outer sleeve, and the second anti-rotation fixing clip is fixedly connected to the outer sleeve through a detachable connection member; at this time, the axes of the insertion rod rings of the first anti-rotation fixing clip and the second anti-rotation fixing clip are collinear, and the distance between the first anti-rotation fixing clip and the second anti-rotation fixing clip is less than the length of the fixing insertion rod; the fixing insertion rod is inserted into the insertion rod rings of the first anti-rotation fixing clip and the second anti-rotation fixing clip, and the stop structures at both ends of the fixing insertion rod prevent the fixing insertion rod from disengaging from the insertion rod ring.

[0033] As an improvement to the above connection structure, the detachable connection member includes:

[0034] A through hole and a screw rod penetrating the side walls of the first half-ring and the second half-ring;

[0035] The through hole has internal threads;

[0036] The screw rod passes through the through hole and combines the first half-ring and the second half-ring into an annular structure by means of threaded connection.

[0037] As an improvement to the above connection structure, the detachable connection member is:

[0038] One end of the first half-ring and the second half-ring is pin-connected, and the other end is snap-connected.

[0039] As an improvement to the above connection structure, the stop structure includes:

[0040] An annular structure fixed at one end of the fixing insertion rod and having a diameter larger than the inner diameter of the insertion rod ring; and

[0041] A through hole at the other end of the fixing insertion rod and a pin shaft cooperating with the through hole.

[0042] The present application also provides a furnace kiln observation device, and the furnace kiln observation device includes the above connection structure.

[0043] The present application also provides a connection structure for connecting a first component to a second component, wherein the second component is hollow and has an open tail end, and a part of the first component is inserted into the second component from the tail end of the second component; the connection structure includes:

[0044] A base, having a through-channel that allows the first member to pass through and formed with an inwardly projecting first annular step portion at its inner wall; the base can be detachably connected to the tail end portion of the second member or integrally formed with the second member at the tail end portion of the second member;

[0045] An elastic retaining ring, having a substantially rectangular or square cross-section, the elastic retaining ring can be sleeved on the first member and can enter the base and abut against the first annular step portion during assembly, the elastic retaining ring has a first state and a second state, in the first state, the elastic retaining ring can slide along the length direction of the first member relative to the first member, in the second state, the elastic retaining ring is compressed so that its inner diameter becomes smaller, thereby tightly holding the first member so that the first member can hardly move relative to the elastic retaining ring;

[0046] A pressing ring, having a through-channel that allows the first member to pass through; the pressing ring enters the through-channel of the base and presses against the elastic retaining ring during assembly, so that the elastic retaining ring is located between the pressing ring and the first annular step portion of the base;

[0047] A clamping lock ring, having a through-channel that allows the first member to pass through and formed with a second annular step portion suitable for abutting against the pressing ring at its inner wall, the clamping lock ring can be detachably connected to the base;

[0048] Wherein, during assembly, the clamping lock ring presses the pressing ring in the direction towards the elastic retaining ring by the second annular step portion during the process of connecting to the base, and the pressing ring then compresses the elastic retaining ring, so that the elastic retaining ring changes from the first state to the second state.

[0049] As an improvement of the above connection structure, the base has an internal thread or an external thread so as to be threadably connected to the second member.

[0050] As an improvement of the above connection structure, the end face of the pressing ring for pressing against the elastic retaining ring and / or the first annular step portion is formed as an inclined surface relative to the elastic retaining ring, and the inclination direction of the inclined surface is away from the elastic retaining ring along the direction from the edge to the center of the elastic retaining ring.

[0051] As an improvement of the above connection structure, the middle section of the outer surface of the pressing ring has an annular groove; the base has a first through-hole penetrating its side wall for receiving a limiting member;

[0052] Wherein, during assembly, the limiting member passes through the first through-hole and extends into the groove of the pressing ring, and the width of the groove is set to allow the pressing ring to move within a predetermined range along the through-channel of the base but not move beyond the limitation of the limiting member.

[0053] As an improvement to the above connection structure, it further includes:

[0054] A positioning ring that can be sleeved on the first member and can be detachably connected to the first member, such that the positioning ring is substantially non-movable along the length direction of the first member relative to the first member; and

[0055] A limiting lock ring that has a third annular step portion and can be detachably connected to the pressing lock ring;

[0056] Wherein, during assembly, the limiting lock ring is connected to the pressing lock ring such that the positioning ring is located between the third annular step portion of the limiting lock ring and the end face of the pressing lock ring to limit the movement of the positioning ring.

[0057] As an improvement to the above connection structure, the positioning ring has an internal thread so as to be threadably connected to the first member; and / or,

[0058] The positioning ring has a second through-hole for receiving a fastener so as to fix the positioning ring to the first member with the fastener.

[0059] As an improvement to the above connection structure, it further includes:

[0060] A sealing ring whose cross-section is substantially circular or elliptical;

[0061] Wherein, an annular groove for accommodating the sealing ring is formed on the inner wall of the base.

[0062] As an improvement to the above connection structure, the position of the annular groove of the base is on the side of the first annular step portion opposite to the elastic pressing ring.

[0063] Compared with the prior art, the advantages of the present application are as follows:

[0064] 1. The connection structure of the present application has a sealing ring, which can seal the gap between the observation gun and the outer sleeve, prevent the leakage of high-pressure dust or gas, and can relatively grip the observation gun to prevent it from moving axially or rotating;

[0065] 2. The connection structure of the present application, through the elastic pressing ring with a square cross-section, utilizes the pressure exerted on the elastic pressing ring by the two side components to deform the elastic pressing ring and grip the observation gun to prevent the observation gun from moving axially or rotating;

[0066] 3. Through the fixed connection between the positioning ring and the observation gun, the position of the positioning ring is limited by the limit locking ring to prevent the observation gun from moving axially.

[0067] 4. Through the combined action of the sealing ring, elastic pressing ring and positioning ring, a sealed and fixed connection can be achieved between the observation gun and the outer sleeve. At the same time, when separation is required, the observation gun can be conveniently withdrawn from the outer sleeve, and high-pressure dust or gas leakage can be prevented during the withdrawal process. BRIEF DESCRIPTION OF THE DRAWINGS

[0068] Figure 1 Shown is a schematic diagram of the furnace observation device;

[0069] Figure 2 Shown is a cross-sectional view of the sealing sleeve in the fastened state of Embodiment 1 of the present application;

[0070] Figure 3 Shown is an exploded view of the sealing sleeve of Embodiment 1 of the present application;

[0071] Figure 4 Shown is a cross-sectional view of the base of Embodiment 1 of the present application;

[0072] Figure 5 Shown is a cross-sectional view of the base of Embodiment 1 of the present application after installing the elastic pressing ring;

[0073] Figure 6 Shown is a cross-sectional view of the pressing lock ring of Embodiment 1 of the present application;

[0074] Figure 7 Shown is a detailed view of the contact position of the pressing ring, base and elastic pressing ring of Embodiment 1 of the present application;

[0075] Figure 8 Shown is a cross-sectional view of the sealing sleeve in the fastened state of Embodiment 2 of the present application;

[0076] Figure 9 Shown is an exploded view of the sealing sleeve of Embodiment 2 of the present application;

[0077] Figure 10 Shown is a three-dimensional view of the positioning ring of Embodiment 2 of the present application;

[0078] Figure 11 Shown is a cross-sectional view of the limit locking ring of Embodiment 2 of the present application;

[0079] Figure 12 Shown is a structural diagram of the base with the first through hole and the pressing ring with the groove of Embodiment 3 of the present application;

[0080] Figure 13 Shown is a structural diagram of the sealing sleeve of Embodiment 4 of the present application;

[0081] Figure 14 The structure diagram of the connection structure according to Embodiment 5 of the present application is shown;

[0082] Figure 15 The structure diagram of the anti-rotation mechanism according to Embodiment 5 of the present application is shown;

[0083] Figure 16 The structure diagram of the anti-rotation fixing clip according to Embodiment 5 of the present application is shown;

[0084] Figure 17 The structure diagram of the fixed insertion rod according to Embodiment 5 of the present application is shown.

[0085] Attached drawing reference signs:

[0086] 1. Sealing sleeve 2. Observation gun

[0087] 3. Outer sleeve 11. Base

[0088] 12. Sealing ring 13. Elastic pressing ring

[0089] 14. Pressing ring 15. Pressing and locking ring

[0090] 16. Positioning ring 17. Limiting locking ring

[0091] 18. Anti-rotation mechanism

[0092] 111. First annular step portion 112. Annular groove

[0093] 113. Convex side 114. First through hole

[0094] 141. Pressing ring end face 142. Groove

[0095] 151. Second annular step portion 161. Second through hole

[0096] 171. Third annular step portion 181. First anti-rotation fixing clip

[0097] 182. Second anti-rotation fixing clip 183. Fixed insertion rod

[0098] 184. First half ring 185. Second half ring

[0099] 186. Insertion rod ring 187. Fixed insertion rod body

[0100] 188. Fixed insertion rod head 189. Fixed insertion rod through hole Detailed implementation manners

[0101] The technical solutions of the present application will be described in detail below with reference to the attached drawings.

[0102] As Figure 1As shown, the furnace observation device may include an observation gun 2 and a sleeve 3 into which it is inserted, both of which may be elongated. For simplicity of description, in the following text, the left end of each figure will be referred to as the tail end, and the right end as the head end. The sleeve 3 may have an inner cavity extending along its length inside for receiving the inserted observation gun 2 therein. The observation gun 2 may be inserted into the sleeve 3 from the tail end of the sleeve 3 and until the head end of the observation gun 2 reaches the head end of the sleeve 3, thereby forming the furnace observation device in the assembled state as shown in Figure 1 The tail end of the observation gun 2 may be exposed outside the sleeve 3 so that the observation gun 2 can be conveniently inserted and pulled out relative to the sleeve 3 while holding the tail end. Although the portion of the observation gun 2 inserted into the sleeve 3 is usually not visible from the outside, Figure 1 this portion is schematically drawn to more clearly see the arrangement of the observation gun 2 inside the sleeve 3.

[0103] Figure 1 The furnace observation device shown in the figure can be installed on an industrial furnace such as a blast furnace, with its head end extending into the furnace and the tail end located outside the furnace. During operation, the head of the observation gun 2 has observation equipment, such as a camera or uses a laser to scan the inside of the blast furnace to obtain information inside the furnace, while the sleeve 3 can protect the observation gun 2 and provide other auxiliary and support functions. Although the furnace observation device will be described below with the blast furnace scenario as an example, it can be understood that the furnace observation device can also be used in other types of industrial furnaces or other occasions where internal observation is required.

[0104] The connection structure includes a sealing sleeve 1. A sealing sleeve 1 may be provided at the tail end of the sleeve 3 for fixing the observation gun 2 and sealing the gap between the observation gun 2 and the sleeve 3. The sealing sleeve 1 may be located at the entrance of the tail end of the sleeve 3. In other words, the sealing sleeve 1 may be formed as the entrance of the sleeve 3. During operation, the sealing sleeve 1 can keep the relative position of the observation gun 2 and the outer sleeve 3 unchanged and can prevent substances such as flue gas and dust in the blast furnace from escaping outward through the gap between the observation gun 2 and the sleeve 3.

[0105] A valve can also be provided in the middle of the outer sleeve 3. When the observation gun 2 is pulled out from the outer sleeve 3, the sealing sleeve 1 and the valve can provide two seals along the pulling path of the observation gun 2. In this way, during the production process of the blast furnace, the head end of the observation gun 2 can be pulled out to the position between the sealing sleeve 1 and the valve, then the valve is closed, and finally the observation gun 2 is pulled out of the outer sleeve 3 through the sealing sleeve 1 as a whole. Similarly, when inserting the observation gun 2, first, the head end of the observation gun 2 can be inserted into the position between the sealing sleeve 1 and the valve, then the valve is opened, and finally the observation gun 2 is further inserted into the outer sleeve 3 through the valve. This realizes the insertion and extraction of the observation gun 2 during the production process of the blast furnace, and at the same time avoids the escape of substances in the furnace to the outside through the outer sleeve 3.

[0106] Embodiment 1

[0107] As Figures 2 - 6 shown, it is a structural diagram of Embodiment 1 of the sealing sleeve provided by the present application. The sealing sleeve 1 includes a base 11, a sealing ring 12, an elastic pressing ring 13, a pressing ring 14, and a pressing lock ring 15 that are connected in sequence.

[0108] As Figure 4 shown, the base 11 is a hollow columnar structure. The head end of the base 11 can be integrally formed with or detachably connected to the tail end of the outer sleeve 3. The detachable connection method can be threaded connection or snap connection, etc. When the base 11 and the outer sleeve 3 are connected by threads, the internal threads of the base 11 and the external threads of the outer sleeve 3 can be used for connection, or the external threads of the base 11 and the internal threads of the outer sleeve 3 can be used for connection. Figure 4 shows the base 11 that is detachably connected to the external threads of the outer sleeve 3, and the head end of the base 11 has internal threads.

[0109] Between the head end and the tail end of the base 11, there is a first annular step portion 111 protruding inward inside the hollow columnar structure. The first annular step portion 111 reduces the inner diameter of the base 11 to be slightly larger than the outer diameter of the observation gun 2. There are a plurality of annular grooves 112 in the middle of the first annular step portion 111. During installation, a plurality of sealing rings 12 are embedded into the annular grooves 112 one by one. The sealing ring 12 is an annular rubber ring, and its cross-section can be circular or elliptical, and its inner diameter is slightly smaller than the outer diameter of the observation gun 2. The "cross-section" in the present application refers to the section perpendicular to the annular extension direction (reference can be made to Figure 2 ). When the observation gun 2 is inserted into the base 11, it is squeezed with the sealing ring 12, causing the sealing ring 12 to deform to seal the gap between the observation gun 2 and the base 11. During the process of the observation gun 2 being pulled out from the base 11, the sealing ring 12 ensures the sealing performance between the observation gun 2 and the base 11, preventing high-pressure flue gas or dust in the blast furnace from overflowing.

[0110] The tail end of the base 11 has external threads and can be threadedly connected to the pressing lock ring 15.

[0111] The base 11 is made of metal.

[0112] The elastic retaining ring 13 is an annular rubber ring with a rectangular or square cross-section. The outer diameter of the elastic retaining ring 13 is slightly smaller than the inner diameter of the tail end of the base 11. The inner diameter of the elastic retaining ring 13 is slightly larger than the outer diameter of the observation gun 2. As Figure 5 shown, during installation, the elastic retaining ring 13 is placed into the tail end of the base 11 and closely adheres to the side of the first annular step portion 111. At this time, the elastic retaining ring 13 is in the first state.

[0113] The pressing ring 14 is a hollow columnar structure. The maximum outer diameter of the pressing ring 14 is slightly smaller than the inner diameter of the tail end of the base 11. The inner side of the pressing ring 14 is a smooth surface, and the inner diameter is slightly larger than the outer diameter of the observation gun 2. During installation, the pressing ring 14 is placed into the tail end of the base 11, and the bottom surface presses the elastic retaining ring 13, causing the elastic retaining ring 13 to deform. At this time, the elastic retaining ring is in the second state. The pressing ring 14 is made of metal.

[0114] As Figure 6 shown, the head end of the clamping lock ring 15 has internal threads. The end where the internal threads extend deep into the inside of the clamping lock ring 15 has an inwardly protruding second annular step portion 151. The inwardly protruding second annular step portion 151 causes the inner diameter of the tail end of the clamping lock ring 15 to decrease, to be slightly larger than the outer diameter of the observation gun 2. During installation, the internal threads at the head end of the clamping lock ring 15 are connected to the external threads at the tail end of the base 11, and the second annular step portion 151 presses the bottom surface of the pressing ring 14. The clamping lock ring 15 is made of metal.

[0115] As Figure 7As shown, the convex platform side surface 113 of the first annular step portion 111 of the base 11 on the side adjacent to the elastic retaining ring 13 has a certain inclination angle relative to the vertical direction. When the pressing ring 14 does not tightly press the elastic retaining ring 13, along the outer side to the inner side direction of the elastic retaining ring 13, the gap between the convex platform side surface 113 and the end surface of the elastic retaining ring 13 becomes larger and larger. The pressing ring end surface 141 of the pressing ring 14 adjacent to the elastic retaining ring 13 also has a certain inclination angle relative to the vertical direction. When the pressing ring 14 does not tightly press the elastic retaining ring 13, along the outer side to the inner side direction of the elastic retaining ring 13, the gap between the pressing ring end surface 141 and the end surface of the elastic retaining ring 13 becomes larger and larger. When the pressing ring 14 and the first annular step portion 111 squeeze the elastic retaining ring 13, since the contact areas of the pressing ring end surface 141 and the convex platform side surface 113 with the elastic retaining ring 13 are very small, the pressure is very high, and the elastic retaining ring 13 can be easily pressurized and deformed. When the elastic retaining ring 13 is deformed, since the three side surfaces adjacent to the base 11 and the pressing ring 14 are made of rigid materials and cannot expand, it can only expand more in the direction of the observation gun 2 and into the gap between the observation gun 2, the pressing ring 14, and the first annular step portion 111. In this way, the elastic retaining ring 13 has a larger contact area with the observation gun 2, and a greater frictional force is generated between the elastic retaining ring 13 and the observation gun 2, preventing relative movement between the observation gun 2 and the elastic retaining ring 13. The pressing ring 14 and the base 11 tightly squeeze the elastic retaining ring 13, making the elastic retaining ring 13 unable to move relative to the pressing ring 14 and the base 11, and thus the observation gun 2 cannot move axially or rotate.

[0116] The cross-section of the elastic retaining ring 13 is selected to be rectangular or square. Compared with a retaining ring with a circular or oval cross-section, a square retaining ring has a larger contact area with the two sides. During the extrusion process, the deformation amount is larger, and it is easier to lock the observation gun. If the cross-section of the retaining ring is circular or oval, during the locking extrusion process, the retaining ring with a circular or oval cross-section will first deform into a square to fill the space, and then transfer pressure to the observation gun for locking.

[0117] The installation process of the seal sleeve in this embodiment is as follows: First, embed multiple sealing rings 12 into the annular groove 112 of the base 11 one by one, and then connect the head end of the base 11 to the tail end of the outer sleeve 3. Place the elastic retaining ring 13 into the base 11 from the tail end of the base 11, and it closely adheres to the side of the first annular step portion 111. Place the retaining ring 14 into the base 11 from the tail end of the base 11, and it contacts the elastic retaining ring 13. Thread-connect the head end of the compression locking ring 15 to the tail end of the base 11, but do not tighten it. Insert the observation gun 2 into the outer sleeve 3 and the seal sleeve 1. The observation device at the head of the observation gun 2 is detachably connected. If the outer diameter of the observation device is larger than the outer diameter of the main body of the observation gun 2, the observation device can be removed first, and then reinstalled after inserting it into the outer sleeve 3. When the observation gun 2 is inserted into the outer sleeve 3 and the seal sleeve 1, the sealing ring 12 is deformed by the extrusion of the observation gun 2, sealing the gap between the observation gun 2 and the seal sleeve 1. After the observation gun 2 is inserted into the appropriate position of the outer sleeve 3, tighten the threaded connection between the compression locking ring 15 and the base 11. At this time, due to the axial pressure exerted by the second annular step portion 151 of the compression locking ring 15 on the retaining ring 14, the retaining ring 14 compresses the elastic retaining ring 13, and the elastic retaining ring 13 undergoes elastic deformation to compress the observation gun 2. Through the combined action of the sealing ring 12 and the elastic retaining ring 13 on the observation gun 2, the gap between the observation gun 2 and the seal sleeve 1 is completely sealed, and the observation gun 2 cannot rotate or move axially.

[0118] When the observation gun 2 needs to be removed from the outer sleeve 3, first loosen the compression locking ring 15 to reduce the pressure of the compression locking ring 15 on the retaining ring 14. At the same time, the pressure of the retaining ring 14 on the elastic retaining ring 13 also becomes smaller, and the elastic retaining ring 13 returns to its original state, reducing the contact area and pressure with the observation gun 2. At this time, the observation gun 2 can rotate and be axially pulled out. However, due to the presence of the sealing ring 12, the gap between the observation gun 2 and the seal sleeve 1 remains closed, preventing the high-pressure flue gas and dust in the furnace from overflowing.

[0119] Embodiment 2

[0120] As Figures 8 - 11 shown, it is the structural diagram of Embodiment 2 of the seal sleeve provided by this application.

[0121] The seal sleeve provided in this embodiment adds a positioning ring 16 and a limit locking ring 17 on the basis of the seal sleeve described in Embodiment 1. At the same time, the shape of the compression locking ring 15 is also different.

[0122] The compression locking ring 15 in this embodiment also has an external thread at the tail end.

[0123] As Figure 10As shown, the positioning ring 16 is a ring structure with a rectangular or square cross-section. The inner diameter of the positioning ring 16 is slightly larger than the outer diameter of the observation gun 2. The outer diameter of the positioning ring 16 is slightly smaller than the inner diameter of the internal thread part of the limit locking ring 17. The inner side wall of the ring structure of the positioning ring 16 has internal threads, and / or one or more second through holes 161 are provided on the side surface, and the second through holes 161 of the positioning ring 16 have internal threads. During installation, the part of the observation gun 2 corresponding to the positioning ring 16 has a section of external threads and is threadedly connected to the positioning ring 16, and / or fasteners are inserted into the second through holes 161 to fix the positioning ring 6 to the observation gun 2. The fasteners can be set screws or screws.

[0124] As Figure 11 shown, the head end of the limit locking ring 17 has internal threads for connecting with the external threads of the pressing locking ring 15. The tail end of the limit locking ring 17 has a third annular step portion 171 protruding inward. The inner diameter of the third annular step portion 171 is slightly larger than the outer diameter of the observation gun 2.

[0125] The installation process of the sealing sleeve in this embodiment is as follows: First, assemble the sealing ring 12, the base 11, the elastic pressing ring 13, the pressing ring 14 and the pressing locking ring 15 in the same steps as in Embodiment 1, and then sequentially place the positioning ring 16 and the limit locking ring 17 at the tail end of the pressing locking ring 15. When the pressing locking ring 15 is tightened, the positioning ring 16 is threadedly connected to the observation gun 2 and rotated to a suitable position, and / or the fasteners are screwed into the second through holes 161 of the positioning ring 16 to press against the observation gun 2. Connect and tighten the internal threads of the limit locking ring 17 with the external threads of the pressing locking ring 15.

[0126] Compared with the sealing sleeve in Embodiment 1, the newly added positioning ring 16 in this embodiment cooperates with the set screws, so that the positioning ring 16 and the observation gun 2 are firmly fixed together. The positioning ring 16 cannot move axially or rotate relative to the observation gun 2. The limit locking ring 17 is threadedly connected to the pressing locking ring 15, which limits the positioning ring 16 from moving axially, and at the same time limits the observation gun 2 from moving axially. On the basis of Embodiment 1, the positioning ring 16 and the limit locking ring 17 further increase the limitation on the axial movement of the observation gun 2, playing a role of double insurance.

[0127] Embodiment 3

[0128] As Figure 12As shown, in Example 3 of the present application, the rear end of the base 11 has one or more first through holes 114 penetrating the side wall; the first through hole 114 has an internal thread. The middle section of the outer side of the pressure ring 14 has an annular groove 142. When the pressure ring 14 enters the rear end of the base 11, the limiter extends from the first through hole 114 into the interior of the base 11 and is located in the groove 142 of the pressure ring 14. Due to the obstruction of the limiter, the pressure ring 14 can only move within the limited space of the width of the groove 142 to prevent it from slipping out of the rear end of the base 11. The limiter can be a top screw, a screw, etc.

[0129] Example 4

[0130] like Figure 13 As shown, compared with Example 2, the elastic pressure ring 13, the pressure ring 14 and the clamping lock ring 15 are omitted in this embodiment, and the limiting lock ring 17 is threadedly connected to the tail end of the base 11. Since the tail end of the base 11 does not need to accommodate the elastic pressure ring 13 and the pressure ring 14, the tail end of the base 11 can be shortened or even omitted to shorten the length of the base 11.

[0131] The sealing sleeve of embodiment 4 omits the elastic pressure ring 13, the pressure ring 14 and the clamping lock ring 15, and therefore can only limit the axial movement of the observation gun 2, and the rotation restriction force on the observation gun 2 is relatively small. It is suitable for a furnace observation device that allows the observation gun 2 to rotate, or a furnace observation device with other equipment to restrict the rotation of the observation gun 2.

[0132] Example 5

[0133] like Figure 14 As shown, the connection structure further includes an anti-rotation mechanism 18 for preventing the observation gun 2 from rotating relative to the outer sleeve 3.

[0134] like Figure 15 As shown, the anti-rotation mechanism 18 includes:

[0135] The first anti-rotation fixing clip 181 for fixing and clamping the observation gun 2, the second anti-rotation fixing clip 182 for fixing and clamping the outer sleeve 3, and the fixing plug rod 183 connecting the first anti-rotation fixing clip 181 and the second anti-rotation fixing clip 182. The first anti-rotation fixing clip 181, the second anti-rotation fixing clip 182 and the fixing plug rod 183 are all made of rigid materials.

[0136] like Figure 16 As shown, the first anti-rotation fixing clamp 181 and the second anti-rotation fixing clamp 182 have the same structure, and both include a first half ring 184 , a second half ring 185 and a rod inserting ring 186 .

[0137] The first semi-ring 184 and the second semi-ring 185 are both semi-circular structures, and the two are joined together to form a complete circular structure. The inner diameter of the circular structure formed by the joining of the first anti-rotation fixing clip 181 is slightly smaller than the outer diameter of the observation gun 2. The inner diameter of the circular structure formed by the joining of the second anti-rotation fixing clip 182 is slightly smaller than the outer diameter of the outer sleeve 3. At the joint of the first semi-ring 184 and the second semi-ring 185, there is a detachable connection member to tightly fix the two semi-rings into a complete circular structure.

[0138] The detachable connection member can be: a through-hole and a screw rod penetrating the side walls of the first semi-ring and the second semi-ring; the through-hole has internal threads; the screw rod passes through the through-hole and is connected by threads to combine the first semi-ring and the second semi-ring into an annular structure.

[0139] The detachable connection member can also be: one end of the first semi-ring and the second semi-ring is connected by a pin, and the other end is connected by a buckle.

[0140] The function of the detachable connection member is to tightly fix the two semi-rings into a complete circular structure and lock the observation gun or the outer sleeve. Any other connection method with this function does not depart from the spirit and scope of the technical solution of this embodiment.

[0141] The plug rod ring 186 is a circular structure, and its axial direction is parallel to the axial direction of the circular structure formed after the first semi-ring 184 and the second semi-ring 185 are joined. The outer wall of the circular structure of the plug rod ring 186 is fixedly connected to the outer wall of the second semi-ring 185. The inner diameter of the circular structure of the plug rod ring 186 is slightly larger than the outer diameter of the fixed plug rod 183.

[0142] As Figure 17 shown, the fixed plug rod 183 includes a cylindrical fixed plug rod body 187. One end of the column of the fixed plug rod body 187 has a fixed plug rod head 188. The fixed plug rod head 188 is a circular structure, and its outer diameter is slightly larger than the inner diameter of the circular structure of the plug rod ring 186. The column of the fixed plug rod body 187 has a fixed plug rod through-hole 189 at the opposite end relative to the fixed plug rod head 188. The fixed plug rod through-hole 189 is a through-hole penetrating the fixed plug rod head 188 in the diameter direction.

[0143] When the anti-rotation mechanism 18 is in use, first, the two half-rings of the first anti-rotation fixing clip 181 are spliced and sleeved on the observation gun 2, and the connecting mechanism is used to fix and hold the two half-rings tightly around the observation gun 2, so that the first anti-rotation fixing clip 181 and the observation gun 2 are relatively fixed, and the observation gun 2 cannot rotate and move along the axial direction relative to the first anti-rotation fixing clip 181; the two half-rings of the second anti-rotation fixing clip 182 are spliced and sleeved on the outer sleeve 3, and the connecting mechanism is used to fix and hold the two half-rings tightly around the outer sleeve 3, so that the first anti-rotation fixing clip 181 and the outer sleeve 3 are relatively fixed, and the outer sleeve 3 cannot rotate and move along the axial direction relative to the second anti-rotation fixing clip 182. When the first anti-rotation fixing clip 181 and the second anti-rotation fixing clip 182 are fixed, it is necessary to ensure that the axes of the insertion rod rings 186 on them are on the same straight line, and the distance between the two anti-rotation fixing clips is less than the length of the fixed insertion rod body 187. Then, the fixed insertion rod 183 is inserted into the insertion rod rings 186 of the first anti-rotation fixing clip 181 and the second anti-rotation fixing clip 182; a pin shaft or other similar device is used to pass through the fixed insertion rod through hole 189 and is fixed. Since the diameter of the fixed insertion rod head 188 is larger than the inner diameter of the insertion rod ring 186 and cannot pass through the insertion rod ring 186, and the fixed insertion rod through hole 189 cannot pass through the insertion rod ring 186 after the pin shaft is inserted, the fixed insertion rod 183 will remain in the position passing through the two insertion rod rings 186 after passing through the two anti-rotation fixing clips. The fixed insertion rod 183 can prevent the two anti-rotation fixing clips from rotating relative to each other, and thus prevent the observation gun 2 from rotating relative to the outer sleeve 3.

[0144] The functions of the fixed insertion rod head 188 and the fixed insertion rod through hole 189 are to prevent the fixed insertion rod 183 from disengaging from the two anti-rotation fixing clips. To achieve the above purpose, the fixed insertion rod head 188 and the fixed insertion rod through hole 189 can also be implemented by other structures, such as a cylinder with a length greater than the inner diameter of the insertion rod ring 186, a nut with an outer diameter greater than the inner diameter of the insertion rod ring 186 threadedly connected to one or both ends of the fixed insertion rod body 187, etc. These technical means do not deviate from the spirit and scope of the technical solution of this embodiment.

[0145] Embodiment 6

[0146] The present application also provides a connection structure for connecting a first component to a second component, wherein the second component is hollow and has an open tail end portion, and a part of the first component is inserted into the second component from the tail end portion of the second component.

[0147] The connection structure for observing the connection between the observation gun 2 and the outer sleeve 3 described above can actually be applied to a more general situation. In this general situation, the connection structure can be used to connect a first member to a second member, where the second member is hollow and has an open end portion, and a part of the first member is inserted into the second member from the end portion of the second member. In this way, the observation gun 2 described above is actually a specific embodiment of the first member, and the outer sleeve 3 is actually a specific embodiment of the second member. Further, the features of the connection structure described for the observation gun 2 and the outer sleeve 3 above can all be applied to the connection structure of the general first member and second member.

[0148] The connection structure may include:

[0149] A base 11 having a through-channel that allows the first member to pass through and having a first annular step portion 111 extending inwardly at its inner wall; the base 11 can be detachably connected to the end portion of the second member or integrally formed with the second member at the end portion of the second member;

[0150] An elastic retaining ring 13, whose cross-section is substantially rectangular or square, the elastic retaining ring 13 can be sleeved on the first member and can enter the base 11 and abut against the first annular step portion 111 during assembly. The elastic retaining ring 13 has a first state and a second state. In the first state, the elastic retaining ring 13 can slide relative to the first member along the length direction of the first member. In the second state, the elastic retaining ring 13 is compressed so that its inner diameter becomes smaller, thereby tightly holding the first member so that the first member can hardly move relative to the elastic retaining ring 13;

[0151] A pressing ring 14 having a through-channel that allows the first member to pass through; the pressing ring 14 enters the through-channel of the base 11 and presses against the elastic retaining ring 13 during assembly, so that the elastic retaining ring 13 is located between the pressing ring 14 and the first annular step portion 111 of the base 11;

[0152] A clamping lock ring 15 having a through-channel that allows the first member to pass through and having a second annular step portion 151 formed on its inner wall suitable for abutting against the pressing ring 14, the clamping lock ring 15 can be detachably connected to the base 11;

[0153] Wherein, during assembly, when the clamping lock ring 15 is connected to the base 11, the pressing ring 14 is pressed towards the elastic retaining ring 13 by the second annular step portion 151, and the pressing ring 14 then compresses the elastic retaining ring 13, so that the elastic retaining ring 13 changes from the first state to the second state.

[0154] Further, the base 11 has an internal thread or an external thread so as to be able to be threadedly connected to the second member.

[0155] Further, the end face of the pressing ring 14 for pressing against the elastic pressing ring 13 and / or the first annular step portion 111 are formed as inclined surfaces with respect to the elastic pressing ring 13, and the inclination direction of the inclined surfaces is away from the elastic pressing ring 13 in the direction from the edge to the center of the elastic pressing ring 13.

[0156] Further, a middle section of the outer surface of the pressing ring 14 has an annular groove 142; the base 11 has a first through hole 114 penetrating through its side wall for receiving a limiting member.

[0157] Wherein, during assembly, the limiting member passes through the first through hole 114 and extends into the groove 142 of the pressing ring 14, and the width of the groove 142 is set to allow the pressing ring 14 to move within a predetermined range along the through channel of the base 11 but not exceed the limitation of the limiting member.

[0158] Further, the connecting structure further includes:

[0159] A positioning ring 16 that can be sleeved on the first member and can be detachably connected to the first member, such that the positioning ring 16 is substantially non-movable along the length direction of the first member; and

[0160] A limiting lock ring 17 having a third annular step portion 171 and can be detachably connected to the pressing lock ring 15;

[0161] Wherein, during assembly, the limiting lock ring 17 is connected to the pressing lock ring 15 such that the positioning ring 16 is located between the third annular step portion 171 of the limiting lock ring 17 and the end face of the pressing lock ring 15 to limit the movement of the positioning ring 16.

[0162] Further, the positioning ring 16 has an internal thread so as to be threadably connected to the first member; and / or, the positioning ring 16 has a second through hole 161 for receiving a fastener so as to fix the positioning ring 16 to the first member with the fastener.

[0163] Further, the connecting structure further includes:

[0164] A sealing ring 12, the cross-section of which is substantially circular or elliptical;

[0165] Wherein, an annular groove 112 for accommodating the sealing ring 12 is formed on the inner wall of the base 11.

[0166] Further, the position of the annular groove 112 of the base 11 is on the side of the first annular step portion 111 opposite to the elastic pressing ring 13.

[0167] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of the present application rather than to limit them. Although the present application has been described in detail with reference to the embodiments, those of ordinary skill in the art should understand that any modification or equivalent replacement of the technical solutions of the present application does not depart from the spirit and scope of the technical solutions of the present application, and they should all be covered by the scope of the claims of the present application.

Claims

1. A connection structure, installed at the rear end of an outer sleeve, for fixing the observation gun and sealing the gap between the observation gun and the outer sleeve; the connection structure includes a sealing sleeve; The sealing sleeve comprises: a base having a through passage capable of allowing the observation gun to pass therethrough; The head end of the base and the tail end of the outer sleeve are integrally formed, or fixedly and detachably connected; the middle part of the base has a first annular step portion protruding inward; the inner side surface of the first annular step portion has one or more annular grooves; the axis of the annular groove is colinear with the axis of the base; One or more sealing rings, which are annular rubber rings, are embedded in the annular groove of the first annular step portion one by one; The elastic pressure ring is an annular rubber ring with a rectangular or square cross section; the elastic pressure ring can be sleeved on the observation gun and can enter the base and abut against the first annular step portion during assembly; The pressing ring is a hollow columnar structure; during assembly, the pressing ring enters the interior of the base and presses against the elastic pressing ring; and A clamping lock ring, the head end of which can be detachably connected to the tail end of the base; a second annular step portion suitable for abutting against the clamping ring is formed inside the tail end of the clamping lock ring; The end surface of the pressure ring in contact with the elastic pressure ring is an inwardly inclined inclined surface; The side of the first annular step portion of the base that contacts the elastic pressure ring is a side that is inclined toward the middle of the first annular step portion; During assembly, the pressure ring is placed in the rear end portion of the base, and its bottom surface and the side surface of the first annular step portion of the base press the elastic pressure ring from both sides.

2. The connection structure according to claim 1, characterized in that: The cross section of the sealing ring is circular or elliptical.

3. The connection structure according to claim 1, characterized in that: The head end of the base and the tail end of the outer sleeve are connected in a fixed and detachable manner by threaded connection.

4. The connection structure according to claim 1, characterized in that: The rear end of the compression lock ring has an external thread; The sealing sleeve also includes: a limit lock ring, having a through passage capable of allowing the observation gun to pass through, and a third annular step portion protruding inwardly at the rear end; and The positioning ring is an annular structure; the side of the positioning ring has one or more second through holes, and the second through holes have internal threads; During assembly, the positioning ring is sleeved on the observation gun, adjacent to the rear end of the clamping lock ring; the top screw passes through the second through hole to tighten the observation gun; the head end of the limiting lock ring accommodates the positioning ring and is detachably connected to the rear end of the clamping lock ring.

5. The connection structure according to claim 4, characterized in that: The positioning ring has an internal thread which is threadably connected to an external thread at a corresponding position on the observation gun.

6. The connection structure according to claim 1, characterized in that: The middle section of the outer ring side surface of the pressure ring is provided with an annular groove; The rear end of the base has one or more first through holes penetrating the side wall; the top screw passes through the first through hole and extends into the interior of the base, so that the head of the top screw is located in the groove of the pressure ring.

7. The connection structure according to any one of claims 1 to 6, characterized in that: The connecting structure further includes an anti-rotation mechanism; The anti-rotation mechanism comprises: A cylindrical fixed plug rod; both ends of the fixed plug rod have stop structures; The first anti-rotation fixing clip and the second anti-rotation fixing clip have the same structure; the first anti-rotation fixing clip and the second anti-rotation fixing clip both include: A first half ring and a second half ring that can be joined into an annular structure by a detachable connecting member; and The rod inserting ring is an annular structure, which allows the fixed rod to be inserted into the annular structure; the rod inserting ring is fixed to the outer wall of the second half ring; the axis of the rod inserting ring is parallel to the axis of the annular structure formed by the first half ring and the second half ring; Among them, during assembly, the annular structure formed by the first half ring and the second half ring of the first anti-rotation fixing clamp is sleeved on the observation gun, and the first anti-rotation fixing clamp is fixedly connected to the observation gun through a detachable connecting component; the annular structure formed by the first half ring and the second half ring of the second anti-rotation fixing clamp is sleeved on the outer sleeve, and the second anti-rotation fixing clamp is fixedly connected to the outer sleeve through a detachable connecting component; at this time, the axis of the rod ring of the first anti-rotation fixing clamp is colinear with the axis of the rod ring of the second anti-rotation fixing clamp, and the distance between the first anti-rotation fixing clamp and the second anti-rotation fixing clamp is less than the length of the fixed rod; the fixed rod is inserted into the rod ring of the first anti-rotation fixing clamp and the rod ring of the second anti-rotation fixing clamp, and the stop structures at both ends of the fixed rod prevent the fixed rod from falling out of the rod ring.

8. The connection structure according to claim 7, characterized in that: The detachable connecting member comprises: A through hole and a screw extending through the side walls of the first and second half rings; The through hole has an internal thread; The screw rod passes through the through hole and combines the first half ring and the second half ring into an annular structure by threaded connection.

9. The connection structure according to claim 7, characterized in that: The detachable connecting member is: The first half ring and the second half ring are connected with a pin at one end and snap-fitted at the other end.

10. The connection structure according to claim 7, characterized in that: The stop structure comprises: An annular structure fixed to one end of the fixed plug rod and having a diameter larger than the inner diameter of the plug rod ring; and A through hole at the other end of the fixed rod and a pin shaft matched with the through hole.

11. A furnace observation device, characterized in that: The furnace observation device includes a connection structure as described in any one of claims 1-10.

Images