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, a limit locking ring, and a positioning ring. During assembly, the positioning ring is sleeved on the observation gun and is adjacent to the tail end of the base. The set screw passes through the second through hole and is used to tighten the observation gun. The head end of the limit locking ring accommodates the positioning ring and is detachably connected to the tail end of the base. The advantages of the present application are as follows: Through the combined action of the elastic retaining 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 At the same time, when separation is required, the observation gun can be conveniently withdrawn from the outer sleeve, and high-pressure dust or gas leakage can be prevented during the withdrawal process.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 envisioned to arrange detection elements such as cameras and other sensors inside the furnace.

[0003] The Chinese patent with the publication number CN1156149C discloses an insertable furnace camera for observing the inside of a furnace, which includes a camera gun, a tubular 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 tubular 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] The Chinese patent application with the publication number 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 in 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 a laser generator outside the furnace into the furnace. The outer sleeve can protect the laser gun and make it adapt to the harsh environment inside the furnace, 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 elongated 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 purpose of this 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 purpose, this 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 can allow 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] A limit locking ring, which has a through channel that can allow the observation gun to pass through, and the tail end has a third annular step portion protruding inwards; and

[0011] A positioning ring, the side surface of the positioning ring has one or more second through holes, and the second through holes have internal threads.

[0012] Among them, during assembly, the positioning ring is sleeved on the observation gun and is adjacent to the tail end of the base; the set screw passes through the second through hole and is used to tighten the observation gun; the head end of the limit locking ring accommodates the positioning ring and is detachably connected to the tail end of the base.

[0013] As an improvement of the above connection structure, the positioning ring has internal threads and is threadedly connected to the external threads at the corresponding position of the observation gun.

[0014] As an improvement of the above connection structure, the connection structure further includes an anti-rotation mechanism.

[0015] The anti-rotation mechanism includes:

[0016] A cylindrical fixed insertion rod; both ends of the fixed insertion rod have stop structures.

[0017] A first anti-rotation fixing clip and a second anti-rotation fixing clip with the same structure; both the first anti-rotation fixing clip and the second anti-rotation fixing clip include:

[0018] A first half ring and a second half ring that can be combined into an annular structure through a detachable connection member; and

[0019] The insertion rod ring is a ring structure that allows the fixed insertion rod to be inserted into the ring structure. The insertion rod ring is fixed to the outer wall of the second half ring. The axis of the insertion rod ring is parallel to the axis of the ring structure formed by combining the first half ring and the second half ring.

[0020] During assembly, the ring 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 ring 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. 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 fixed insertion rod. The fixed 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 fixed insertion rod prevent the fixed insertion rod from slipping out of the insertion rod ring.

[0021] As an improvement of the above connection structure, the detachable connection member includes:

[0022] A through hole and a screw rod penetrating the side walls of the first half ring and the second half ring;

[0023] The through hole has internal threads;

[0024] The screw rod passes through the through hole and combines the first half ring and the second half ring into a ring structure by threaded connection.

[0025] As an improvement of the above connection structure, the detachable connection member is:

[0026] One end of the first half ring and the second half ring is pin-connected, and the other end is snap-connected.

[0027] As an improvement of the above connection structure, the stop structure includes:

[0028] A ring structure fixed at one end of the fixed insertion rod with a diameter larger than the inner diameter of the insertion rod ring; and

[0029] A through hole at the other end of the fixed insertion rod and a pin shaft cooperating with the through hole.

[0030] The present application also provides a furnace observation device, and the furnace observation device includes the above connection structure.

[0031] Compared with the prior art, the advantages of the present application are:

[0032] 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 hold the observation gun tightly to prevent its axial movement or rotation.

[0033] 2. 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 axial movement of the observation gun.

[0034] 3. Through the combined action of the elastic retaining ring and the positioning ring, the observation gun and the outer sleeve can be sealed and fixedly connected. At the same time, when separation is required, the observation gun can be conveniently withdrawn from the outer sleeve, and the leakage of high-pressure dust or gas can be prevented during the withdrawal process. BRIEF DESCRIPTION OF THE DRAWINGS

[0035] Figure 1 Shown is a schematic diagram of the furnace kiln observation device;

[0036] Figure 2 Shown is a cross-sectional view of the sealing sleeve in the fastened state of Embodiment 1 of the present application;

[0037] Figure 3 Shown is an exploded view of the sealing sleeve of Embodiment 1 of the present application;

[0038] Figure 4 Shown is a cross-sectional view of the base of Embodiment 1 of the present application;

[0039] Figure 5 Shown is a cross-sectional view of the base of Embodiment 1 of the present application after installing the elastic retaining ring;

[0040] Figure 6 Shown is a cross-sectional view of the compression locking ring of Embodiment 1 of the present application;

[0041] Figure 7 Shown is a detailed view of the contact position of the retaining ring, the base and the elastic retaining ring of Embodiment 1 of the present application;

[0042] Figure 8 Shown is a cross-sectional view of the sealing sleeve in the fastened state of Embodiment 2 of the present application;

[0043] Figure 9 Shown is an exploded view of the sealing sleeve of Embodiment 2 of the present application;

[0044] Figure 10 Shown is a three-dimensional view of the positioning ring of Embodiment 2 of the present application;

[0045] Figure 11 Shown is a cross-sectional view of the limit locking ring of Embodiment 2 of the present application;

[0046] Figure 12 Shown is a structural diagram of the base with the first through hole and the retaining ring with a groove of Embodiment 3 of the present application;

[0047] Figure 13 The following is the structural diagram of the sealing sleeve according to Embodiment 4 of the present application;

[0048] Figure 14 The following is the structural diagram of the connection structure according to Embodiment 5 of the present application;

[0049] Figure 15 The following is the structural diagram of the anti-rotation mechanism according to Embodiment 5 of the present application;

[0050] Figure 16 The following is the structural diagram of the anti-rotation fixing clip according to Embodiment 5 of the present application;

[0051] Figure 17 The following is the structural diagram of the fixed insertion rod according to Embodiment 5 of the present application.

[0052] Reference signs in the drawings:

[0053] 1. Sealing sleeve 2. Observation gun

[0054] 3. Outer sleeve 11. Base

[0055] 12. Sealing ring 13. Elastic pressing ring

[0056] 14. Pressing ring 15. Compression locking ring

[0057] 16. Positioning ring 17. Limit locking ring

[0058] 18. Anti-rotation mechanism

[0059] 111. First annular step portion 112. Annular groove

[0060] 113. Convex side 114. First through hole

[0061] 141. Pressing ring end face 142. Groove

[0062] 151. Second annular step portion 161. Second through hole

[0063] 171. Third annular step portion 181. First anti-rotation fixing clip

[0064] 182. Second anti-rotation fixing clip 183. Fixed insertion rod

[0065] 184. First half ring 185. Second half ring

[0066] 186. Insertion rod ring 187. Fixed insertion rod body 188. Fixed insertion rod head 189. Fixed insertion rod through hole Detailed implementation manners

[0067] The technical solution of the present application will be described in detail below with reference to the accompanying drawings.

[0068] As Figure 1 shown, the furnace kiln observation device may include an observation gun 2 and an outer sleeve 3 into which it is inserted, and they may both be elongated. For simplicity of description, in the following text, the left end of each figure is referred to as the tail end, and the right end is referred to as the head end. The outer sleeve 3 may have a cavity extending along its length inside it for receiving the inserted observation gun 2 therein. The observation gun 2 may be inserted into the outer sleeve 3 from the tail end of the outer sleeve 3 and until the head end of the observation gun 2 reaches the head end of the outer sleeve 3, thus forming a furnace kiln observation device in an assembled state as Figure 1 shown. The tail end of the observation gun 2 may be exposed outside the outer sleeve 3 so that the observation gun 2 can be conveniently inserted and pulled out relative to the outer sleeve 3 while holding the tail end. Although the part of the observation gun 2 inserted into the outer sleeve 3 is usually not visible from the outside, Figure 1 this part is schematically drawn to more clearly see the arrangement of the observation gun 2 inside the outer sleeve 3.

[0069] Figure 1 The furnace kiln observation device shown as shown can be installed on an industrial kiln such as a blast furnace, with its head end extending into the furnace and its 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 outer sleeve 3 can protect the observation gun 2 and provide other auxiliary and support functions. Although the furnace kiln observation device will be described below with the blast furnace scenario as an example, it can be understood that the furnace kiln observation device can also be used in other types of industrial kilns or other occasions where internal observation is required.

[0070] The connection structure includes a sealing sleeve 1. A sealing sleeve 1 may be provided at the tail end of the outer sleeve 3 for fixing the observation gun 2 and sealing the gap between the observation gun 2 and the outer sleeve 3. The sealing sleeve 1 may be located at the entrance of the tail end of the outer sleeve 3. In other words, the sealing sleeve 1 may be formed as the entrance of the outer sleeve 3. During operation, the sealing sleeve 1 can keep the relative position of the observation gun 2 and the outer sleeve tube 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 outer sleeve 3.

[0071] 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 of the furnace through the outer sleeve 3.

[0072] Embodiment 1

[0073] 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.

[0074] 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.

[0075] Between the head end and the tail end of the base 11, there is a first annular step portion 111 protruding inwardly 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 cross-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 the high-pressure flue gas or dust in the blast furnace from overflowing.

[0076] The tail end of the base 11 has external threads and can be threadedly connected to the pressing lock ring 15.

[0077] The base 11 is made of metal.

[0078] 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 attached to the side of the first annular step portion 111. At this time, the elastic retaining ring 13 is in the first state.

[0079] 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 to deform the elastic retaining ring 13. At this time, the elastic retaining ring is in the second state. The pressing ring 14 is made of metal.

[0080] As Figure 6 shown, the head end of the clamping lock ring 15 has an internal thread. The end of the internal thread extending deep into the inside of the clamping lock ring 15 has a second annular step portion 151 protruding inwards. The second annular step portion 151 protruding inwards causes the inner diameter of the tail end of the clamping lock ring 15 to shrink to be slightly larger than the outer diameter of the observation gun 2. During installation, the internal thread at the head end of the clamping lock ring 15 is connected to the external thread 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.

[0081] 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 direction from the outside to the inside of the elastic retaining ring 13, the gap between the convex platform side surface 113 and the end face of the elastic retaining ring 13 becomes larger and larger. The end face 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 direction from the outside to the inside of the elastic retaining ring 13, the gap between the end face 141 of the pressing ring 14 and the end face 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 area between the end face 141 of the pressing ring and the convex platform side surface 113 and the elastic retaining ring 13 is 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 deforms, 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 preventing the observation gun 2 from moving axially and rotating.

[0082] The cross-section of the elastic retaining ring 13 is selected as rectangular or square. Compared with a retaining ring with a circular or elliptical cross-section, a square retaining ring has a larger contact area with the two sides. During the extrusion process, the amount of deformation is larger, and it is easier to lock the observation gun. If the cross-section of the retaining ring is circular or elliptical, during the locking extrusion process, the retaining ring with a circular or elliptical cross-section will first deform into a square to fill the space, and then transfer pressure to the observation gun for locking.

[0083] The installation process of the sealing 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 press it tightly against 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 make it contact with 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 sealing 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 greater 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 sealing 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 sealing 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 presses the elastic retaining ring 13, and the elastic retaining ring 13 undergoes elastic deformation to press 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 sealing sleeve 1 is completely closed, and the observation gun 2 cannot rotate or move axially.

[0084] 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 sealing sleeve 1 remains closed, preventing the high-pressure flue gas and dust in the furnace from overflowing.

[0085] Embodiment 2

[0086] As Figures 8 - 11 shown, it is a structural diagram of Embodiment 2 of the sealing sleeve provided by this application.

[0087] The sealing sleeve provided in this embodiment adds a positioning ring 16 and a limit locking ring 17 on the basis of the sealing sleeve described in Embodiment 1. At the same time, the shape of the compression locking ring 15 is also different.

[0088] The compression locking ring 15 of this embodiment also has an external thread at the tail end.

[0089] 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 lock 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 a fastener is inserted into the second through hole 161 to fix the positioning ring 6 and the observation gun 2. The fastener can be a set screw or a screw.

[0090] As Figure 11 shown, the head end of the limit lock ring 17 has internal threads for connecting with the external threads of the pressing lock ring 15. The tail end of the limit lock 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.

[0091] 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 lock ring 15 in the same steps as in Embodiment 1. Then, place the positioning ring 16 and the limit lock ring 17 at the tail end of the pressing lock ring 15 in sequence. When the pressing lock 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 fastener is screwed into the second through hole 161 of the positioning ring 16 to press against the observation gun 2 tightly. Connect and tighten the internal threads of the limit lock ring 17 and the external threads of the pressing lock ring 15.

[0092] Compared with the sealing sleeve in Embodiment 1, the newly added positioning ring 16 in this embodiment cooperates with the set screw, 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 lock ring 17 is threadedly connected to the pressing lock ring 15, which restricts the positioning ring 16 from moving axially, and at the same time restricts the observation gun 2 from moving axially. On the basis of Embodiment 1, the positioning ring 16 and the limit lock ring 17 further increase the restriction on the axial movement of the observation gun 2, playing a role of double insurance.

[0093] Embodiment 3

[0094] As Figure 12As shown in the figure, in Embodiment 3 of the present application, the tail end of the base 11 has one or more first through holes 114 penetrating the side wall; the inside of the first through hole 114 has internal threads. The middle section on the outside of the pressure ring 14 has an annular groove 142. When the pressure ring 14 enters the tail end of the base 11, the limiting member extends into the inside of the base 11 from the first through hole 114 and is located in the groove 142 of the pressure ring 14. Due to the blocking of the limiting member, the pressure ring 14 can only move within the limited space of the width of the groove 142, preventing it from coming out of the tail end of the base 11. The limiting member can be a set screw, a screw, etc.

[0095] Embodiment 4

[0096] As Figure 13 shown, compared with Embodiment 2, in this embodiment, the elastic pressure ring 13, the pressure ring 14 and the compression locking ring 15 are omitted, and the limiting locking ring 17 is threadedly connected to the tail end of the base 11. Since the tail end of the base 11 no longer needs 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.

[0097] For the sealing sleeve of this Embodiment 4, since the elastic pressure ring 13, the pressure ring 14 and the compression locking ring 15 are omitted, it can only limit the axial movement of the observation gun 2, and the limiting force on the rotation of the observation gun 2 is 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 that restricts the rotation of the observation gun 2.

[0098] Embodiment 5

[0099] As Figure 14 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.

[0100] As Figure 15 shown, the anti-rotation mechanism 18 includes:

[0101] a first anti-rotation fixing clip 181 for fixedly clamping the observation gun 2, a second anti-rotation fixing clip 182 for fixedly clamping the outer sleeve 3, and a fixing plug 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 183 are all made of rigid materials.

[0102] As Figure 16 shown, the structures of the first anti-rotation fixing clip 181 and the second anti-rotation fixing clip 182 are the same, and both include a first half ring 184, a second half ring 185 and a plug ring 186.

[0103] Both the first semi-ring 184 and the second semi-ring 185 are 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.

[0104] The detachable connection member can be: a through hole and a screw rod passing through 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 uses the threaded connection to combine the first semi-ring and the second semi-ring into an annular structure.

[0105] The detachable connection member can also be: one end of the first semi-ring and the second semi-ring is pin-connected, and the other end is snap-connected.

[0106] 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.

[0107] 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.

[0108] 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 that penetrates the fixed plug rod body 187 in the diameter direction.

[0109] 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 second anti-rotation fixing clip 182 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 in a 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.

[0110] 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 nuts with an outer diameter larger than the inner diameter of the insertion rod ring 186 being threadedly connected to one or both ends of the fixed insertion rod body 187, etc. These technical means do not depart from the spirit and scope of the technical solution of this embodiment.

[0111] Embodiment 6

[0112] 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.

[0113] 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 tail end, and a part of the first member is inserted into the second member from the tail end 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 above for the observation gun 2 and the outer sleeve 3 can all be applied to the connection structure of the general first member and second member.

[0114] The connection structure may include:

[0115] A base 11 having a through-channel that allows the first member to pass through and formed with an inwardly projecting first annular step portion 111 on its inner wall; the base 11 can be detachably connected to the tail end of the second member or integrally formed with the second member at the tail end of the second member;

[0116] 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;

[0117] A pressure ring 14 having a through-channel that allows the first member to pass through; the pressure 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 pressure ring 14 and the first annular step portion 111 of the base 11;

[0118] A compression locking ring 15 having a through-channel that allows the first member to pass through and formed with a second annular step portion 151 on its inner wall suitable for abutting against the pressure ring 14, the compression locking ring 15 can be detachably connected to the base 11;

[0119] Wherein, during assembly, when the compression locking ring 15 is connected to the base 11, the pressure ring 14 is pressed towards the elastic retaining ring 13 by the second annular step portion 151, and the pressure 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.

[0120] 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.

[0121] Furthermore, 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 surface is away from the elastic pressing ring 13 in the direction from the edge to the center of the elastic pressing ring 13.

[0122] Furthermore, 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;

[0123] 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 to move beyond the limitation of the limiting member.

[0124] Furthermore, the connecting structure further includes:

[0125] A positioning ring 16, which 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

[0126] A limiting lock ring 17, which has a third annular step portion 171 and can be detachably connected to the pressing lock ring 15;

[0127] 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.

[0128] Furthermore, the positioning ring 16 has an internal thread so as to be threadedly connected to the first member; and / or, the positioning ring 16 has a second through hole 161 for receiving a fastening member so as to fix the positioning ring 16 to the first member with the fastening member.

[0129] Furthermore, the connecting structure further includes:

[0130] A sealing ring 12, whose cross-section is substantially circular or elliptical;

[0131] Wherein, an annular groove 112 for accommodating the sealing ring 12 is formed on the inner wall of the base 11.

[0132] Furthermore, 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.

[0133] 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 within 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; 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 A positioning ring, wherein the side surface 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 base; the top screw passes through the second through hole to tighten the observation gun; the head end of the limit lock ring accommodates the positioning ring and is detachably connected to the rear end of the base; The connection structure also 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; 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.

2. The connection structure according to claim 1, characterized in that: The positioning ring has an internal thread which is threadably connected to an external thread at a corresponding position of the observation gun.

3. The connection structure according to claim 1, 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.

4. The connection structure according to claim 1, characterized in that: The detachable connecting member is: The first half ring and the second half ring are connected by a pin at one end and by a buckle at the other end.

5. The connection structure according to claim 1, 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 insertion rod and a pin shaft matched with the through hole.

6. A furnace observation device, characterized in that: The furnace observation device includes a connection structure as described in any one of claims 1-5.

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