Connecting structure and furnace observation device

Abstract

The invention provides a connecting structure and a furnace observation device, and the connecting structure is installed at the tail end part of an outer sleeve and is used for fixing an observation gun and sealing a gap between the observation gun and the outer sleeve; the connecting structure comprises a sealing sleeve; the sealing sleeve comprises a base, one or more sealing rings, a limiting lock ring and a positioning ring, during assembly, the positioning ring sleeves the observation gun and is adjacent to the tail end part of the base; the jackscrew penetrates through the second through hole and is used for tightly jacking the observation gun; and the end part of the limiting lock ring head accommodates the positioning ring and is detachably connected with the tail end part of the base. The observation gun has the advantages that through the combined action of the elastic pressing ring and the positioning ring, the observation gun and the outer sleeve can be connected in a sealed and fixed mode, meanwhile, when separation is needed, the observation gun can be conveniently pulled out of the outer sleeve, and high-pressure dust or gas leakage can be prevented in the pulling-out process.

Description

Technical Field

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

[0002] Closed industrial furnaces such as blast furnaces have high temperature, high pressure, high dust and other furnace environments, so it is difficult to observe through the observation window with human eyes. To this end, various detection devices have been proposed to obtain information inside the furnace, such as infrared cameras, microwave scanning, etc. 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 hinder detection because the observation window is prone to dust accumulation. Therefore, people imagine that detection elements such as sensors such as cameras are arranged inside the furnace.

[0003] The Chinese patent with the announcement number CN1156149C discloses an insertable furnace camera for observing the inside of the furnace, which includes a camera gun, a tubular cooler, a sealing valve and a sealing sleeve (connecting 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 in the blast furnace. Since the camera gun is sealed by the sealing sleeve and the sealing valve, during the blast furnace production process, the camera gun can be pulled out to 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 inspection and maintenance. In the process of pulling the camera gun out of the sealing sleeve, the sealing should be maintained as much as possible to prevent leakage of high-pressure flue gas or dust in the furnace.

[0004] The Chinese patent application with publication number CN118655696A proposes a laser scanning device, which may include a laser gun and an outer sleeve inserted therein. The laser scanning device may be installed in an industrial kiln such as a blast furnace, so that its head end extends into the furnace and the tail end is located outside the furnace, and the laser emitted from the head end may be scanned in the furnace to obtain information in the furnace. The laser gun is used to transmit the laser generated by the laser generator outside the furnace into the furnace. The outer sleeve may protect the laser gun so that it can adapt to the harsh environment in the furnace, and the outer sleeve may also provide other auxiliary and supporting functions. In one embodiment of the laser gun, the laser transmission line extends in the long barrel of the laser gun and is used to transmit the laser, which is collimated by a collimator and then reflected into the furnace by a reflector. The reflector frame with the reflector is driven to rotate by a motor drive assembly to perform scanning operations within a predetermined scanning angle range. The present application relates to changes and / or improvements to the laser scanning device in the Chinese patent application, and therefore, the entire contents of the patent application are hereby introduced into this specification as a reference. Summary of the invention

[0005] The purpose 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] In order to achieve the above-mentioned purpose, the present application proposes a connection structure, which is installed at the rear 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 comprises:

[0008] The base has a through passage capable of allowing the observation gun to pass through; the head end of the base is integrally formed with the tail end of the outer sleeve, or is 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;

[0009] 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;

[0010] 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

[0011] 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;

[0012] 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.

[0013] As an improvement to the above connection structure, the positioning ring has an internal thread which is threadably connected to an external thread at a 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 comprises:

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

[0017] 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:

[0018] A first half ring and a second half ring that can be joined into an annular structure by a detachable connecting member; and

[0019] 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;

[0020] 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.

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

[0022] A through hole and a screw extending through the side walls of the first and second half rings;

[0023] The through hole has an internal thread;

[0024] 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.

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

[0026] 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.

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

[0028] 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

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

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

[0031] Compared with the prior art, the advantages of this 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 to prevent leakage of high-pressure dust or gas, and can relatively hold the observation gun to prevent it from moving or rotating in the axial direction;

[0033] 2. Through the fixed connection between the positioning ring and the observation gun, the limit lock ring limits the position of the positioning ring to prevent the observation gun from moving axially;

[0034] 3. Through the combined effect of the elastic pressure 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 easily pulled out of the outer sleeve, and the leakage of high-pressure dust or gas can be prevented during the extraction process. BRIEF DESCRIPTION OF THE DRAWINGS

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

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

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

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

[0039] Figure 5 The figure shows a cross-sectional view of the base after the elastic pressure ring is installed in Example 1 of the present application;

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

[0041] Figure 7 The figure shows the contact position details of the pressure ring, the base and the elastic pressure ring of Example 1 of the present application;

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

[0043] Fig. 9 Shown is an exploded view of the sealing sleeve of Example 2 of the present application;

[0044] Fig.10 Shown is a stereoscopic view of a positioning ring of Example 2 of the present application;

[0045] Fig.11 Shown is a cross-sectional view of a position limiting locking ring of Example 2 of the present application;

[0046] Fig.12 Shown is a structural diagram of a base with a first through hole and a pressure ring with a groove according to Example 3 of the present application;

[0047] Fig.13 Shown is a structural diagram of a sealing sleeve according to Example 4 of the present application;

[0048] Fig.14 Shown is a diagram of the connection structure of Example 5 of the present application;

[0049] Fig.15 Shown is a structural diagram of the anti-rotation mechanism of Example 5 of the present application;

[0050] Fig.16 Shown is a structural diagram of an anti-rotation fixing clip according to Example 5 of the present application;

[0051] Fig.17 Shown is a diagram of the fixed insertion rod structure of Example 5 of the present application.

[0052] Figure ID:

[0053] 1. Sealing sleeve 2. Observation gun

[0054] 3. Outer sleeve 11. Base

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

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

[0057] 16. Positioning ring 17. Limiting lock ring

[0058] 18. Anti-rotation mechanism

[0059] 111. first annular step portion 112. annular groove

[0060] 113, side surface of boss 114, first through hole

[0061] 141, end face of pressure ring 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. Fixing rod

[0065] 184, first half ring 185, second half ring

[0066] 186, rod ring 187, fixed rod body 188, fixed rod head 189, fixed rod through hole DETAILED DESCRIPTION

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

[0068] like Figure 1 As shown, the furnace observation device may include an observation gun 2 and an outer sleeve 3 into which it is inserted, both of which may be elongated. For simplicity of description, the left end in 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 an inner cavity extending along its length direction therein for receiving the inserted observation gun 2 therein. The observation gun 2 may be inserted into the outer sleeve 3 from the tail end, and until the head end of the observation gun 2 reaches the head end of the outer sleeve 3, thereby forming a structure as shown in FIG. Figure 1 The furnace observation device in the assembled state is shown. The rear end of the observation gun 2 can be exposed outside the outer sleeve 3, so that the observation gun 2 can be easily inserted and pulled out relative to the outer sleeve 3 while holding the rear 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 drawn schematically so that the arrangement of the observation gun 2 in the outer sleeve 3 can be seen more clearly.

[0069] Figure 1 The kiln observation device shown can be installed on an industrial kiln such as a blast furnace, so that its head end extends into the furnace and the tail end is located outside the furnace. When working, the head of the observation gun 2 has an observation device, such as a camera or a laser to scan the inside of the blast furnace to obtain information inside the furnace, and the outer sleeve 3 can protect the observation gun 2 and provide other auxiliary and supporting functions. Although the kiln observation device will be described below in conjunction with the blast furnace scene as an example, it can be understood that the 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. The sealing sleeve 1 can be provided at the rear end of the outer sleeve 3 to fix the observation gun 2 and seal the gap between the observation gun 2 and the outer sleeve 3. The sealing sleeve 1 can be located at the entrance of the rear end of the outer sleeve 3. In other words, the sealing sleeve 1 can form 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 3 unchanged, and can prevent the smoke, dust and other substances in the blast furnace from escaping outward through the gap between the observation gun 2 and the outer sleeve 3.

[0071] A valve may 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 may 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 may be pulled out to the position between the sealing sleeve 1 and the valve, and then the valve may be closed, and finally the observation gun 2 may be pulled out of the outer sleeve 3 as a whole through the sealing sleeve 1. Similarly, when inserting the observation gun 2, the head end of the observation gun 2 may first be inserted into the position between the sealing sleeve 1 and the valve, and then the valve may be opened, and finally the observation gun 2 may be further inserted into the outer sleeve 3 through the valve. This realizes the insertion and removal of the observation gun 2 during the production process of the blast furnace, and at the same time prevents the materials in the furnace from escaping to the outside of the furnace through the outer sleeve 3.

[0072] Example 1

[0073] like Figure 2-Figure 6 , which is a structural diagram of the embodiment 1 of the sealing sleeve provided by the present application. The sealing sleeve 1 comprises a base 11, a sealing ring 12, an elastic pressure ring 13, a pressure ring 14 and a compression lock ring 15 which are connected in sequence.

[0074] like Figure 4 As shown, the base 11 is a hollow columnar structure. The head end of the base 11 can be integrally formed with the tail end of the outer sleeve 3 or detachably connected. The detachable connection method can be a threaded connection or a snap connection. When the base 11 and the outer sleeve 3 are threadedly connected, the base 11 internal thread and the outer sleeve 3 external thread can be connected, or the base 11 external thread and the outer sleeve 3 internal thread can be connected. Figure 4 The figure shows a base 11 which is detachably connected to the external thread of the outer sleeve 3, and the head end of the base 11 has an internal thread.

[0075] Between the head end and the tail end of the base 11, the interior of the hollow cylindrical structure has a first annular step portion 111 protruding inward. 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. The middle of the first annular step portion 111 has a plurality of annular grooves 112. During installation, the plurality of sealing rings 12 are embedded one by one into the annular grooves 112. 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 this application refers to a cross section perpendicular to the direction of extension of the ring (refer 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 and seal the gap between the observation gun 2 and the base 11. When the observation gun 2 is pulled out of the base 11, the sealing ring 12 ensures the sealing between the observation gun 2 and the base 11 to prevent the high-pressure flue gas or dust in the blast furnace from escaping.

[0076] The rear end of the base 11 has an external thread, which can be threadedly connected to the clamping lock ring 15 .

[0077] The base 11 is made of metal.

[0078] The elastic pressing ring 13 is an annular rubber ring with a rectangular or square cross section. The outer diameter of the elastic pressing ring 13 is slightly smaller than the inner diameter of the rear end of the base 11. The inner diameter of the elastic pressing ring 13 is slightly larger than the outer diameter of the observation gun 2. Figure 5 As shown, during installation, the elastic pressing ring 13 is placed into the rear end of the base 11 and is closely attached to the side of the first annular step portion 111 . At this time, the elastic pressing ring 13 is in the first state.

[0079] The pressing ring 14 is a hollow cylindrical 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. When installing, the pressing ring 14 is placed in the tail end of the base 11, and the bottom surface presses the elastic pressing ring 13 to deform the elastic pressing ring 13. At this time, the elastic pressing ring is in the second state. The pressing ring 14 is made of metal.

[0080] like Figure 6 As shown, the head end of the clamping lock ring 15 has an internal thread. The end of the internal thread that penetrates into the inside of the clamping lock ring 15 has a second annular step portion 151 protruding inward. The second annular step portion 151 protruding inward reduces the inner diameter of the tail end of the clamping lock ring 15 to be slightly larger than the outer diameter of the observation gun 2. During installation, the internal thread of the head end of the clamping lock ring 15 is connected to the external thread of the tail end of the base 11, and the second annular step portion 151 compresses the bottom surface of the clamping ring 14. The clamping lock ring 15 is made of metal.

[0081] like Figure 7As shown, the first annular step portion 111 of the base 11 has a certain inclination angle relative to the vertical direction at the boss side 113 on the side adjacent to the elastic pressure ring 13. When the pressure ring 14 does not press the elastic pressure ring 13, the gap between the boss side 113 and the end face of the elastic pressure ring 13 increases from the outside to the inside of the elastic pressure ring 13. The pressure ring 14 also has a certain inclination angle relative to the vertical direction at the pressure ring end face 141 adjacent to the elastic pressure ring 13. When the pressure ring 14 and the first annular step portion 111 squeeze the elastic pressure ring 13, the pressure is very large because the contact area between the pressure ring end face 141 and the boss side 113 and the elastic pressure ring 13 is very small, and the elastic pressure ring 13 can be easily deformed by pressure. When the elastic pressing ring 13 is deformed, it cannot expand because the three sides adjacent to the base 11 and the pressing ring 14 are made of rigid materials, and can only expand more toward the direction of the observation gun 2 and in the gap between the observation gun 2, the pressing ring 14, and the first annular step 111. In this way, the elastic pressing ring 13 has a larger contact area with the observation gun 2, and a greater friction force is generated between the elastic pressing ring 13 and the observation gun 2, preventing the movement between the observation gun 2 and the elastic pressing ring 13. The pressing ring 14 and the base 11 tightly squeeze the elastic pressing ring 13, so that the elastic pressing ring 13 cannot move relative to the pressing ring 14 and the base 11, and the observation gun 2 cannot move or rotate in the axial direction.

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

[0083] The installation process of the sealing sleeve of this embodiment is as follows: first, multiple sealing rings 12 are embedded one by one into the annular groove 112 of the base 11, and then the head end of the base 11 is connected to the tail end of the outer sleeve 3. The elastic pressure ring 13 is placed into the base 11 from the tail end of the base 11, close to the side of the first annular step 111. The pressure ring 14 is placed into the base 11 from the tail end of the base 11, and contacts the elastic pressure ring 13. The head end of the clamping lock ring 15 is threadedly connected 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 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 the outer sleeve 3 is inserted. When the observation gun 2 is inserted into the outer sleeve 3 and the sealing sleeve 1, the sealing ring 12 is squeezed by the observation gun 2 and deformed, 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, the threaded connection between the compression lock ring 15 and the base 11 is tightened. At this time, since the second annular step portion 151 of the compression lock ring 15 applies axial pressure to the compression ring 14, the compression ring 14 compresses the elastic compression ring 13, and the elastic compression ring 13 undergoes elastic deformation to compress the observation gun 2. Through the combined action of the sealing ring 12 and the elastic compression 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 it is necessary to remove the observation gun 2 from the outer sleeve 3, first loosen the compression lock ring 15 to reduce the pressure of the compression lock ring 15 on the pressure ring 14, and the pressure of the pressure ring 14 on the elastic pressure ring 13 is also reduced at the same time, and the elastic pressure 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 be rotated and axially pulled, but due to the existence of the sealing ring 12, the gap between the observation gun 2 and the sealing sleeve 1 is still in a closed state, so that the high-pressure flue gas and dust in the furnace cannot escape.

[0085] Example 2

[0086] like Figure 8-Figure 11 Shown is a structural diagram of Example 2 of the sealing sleeve provided in the present application.

[0087] The sealing sleeve provided in this embodiment is in addition to the sealing sleeve described in Embodiment 1, with a positioning ring 16 and a limiting locking ring 17 added, and the shape of the clamping locking ring 15 is also different.

[0088] The clamping lock ring 15 of this embodiment also has an external thread at the rear end.

[0089] like Fig.10As shown, the positioning ring 16 is an annular 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 threaded portion of the limiting lock ring 17. The inner side wall of the annular structure of the positioning ring 16 has an internal thread, and / or the side has one or more second through holes 161, and the second through holes 161 of the positioning ring 16 have internal threads. During installation, the portion of the observation gun 2 corresponding to the positioning ring 16 has an external thread, which is threadedly connected to the positioning ring 16, and / or a fastener is used to extend into the second through hole 161 to fix the positioning ring 6 to the observation gun 2. The fastener can be a top screw or a screw.

[0090] like Fig.11 As shown, the head end of the limiting lock ring 17 has an internal thread for connecting with the external thread of the clamping lock ring 15. The tail end of the limiting 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 of this embodiment is as follows: first, the sealing ring 12, the base 11, the elastic pressure ring 13, the pressure ring 14 and the clamping lock ring 15 are assembled in the same steps as in Embodiment 1, and then the positioning ring 16 and the limiting lock ring 17 are sequentially placed on the tail end of the clamping lock ring 15. When the clamping lock ring 15 is tightened, the positioning ring 16 is threadedly connected with the observation gun 2, rotated to a suitable position, and / or the fastener is screwed into the second through hole 161 of the positioning ring 16 to tighten the observation gun 2. The internal thread of the limiting lock ring 17 is connected and tightened with the external thread of the clamping lock ring 15.

[0092] Compared with the sealing sleeve of Example 1, the newly added positioning ring 16 in this embodiment cooperates with the top screw to firmly fix the positioning ring 16 and the observation gun 2 together. The positioning ring 16 cannot move axially or rotate relative to the observation gun 2. The limiting lock ring 17 is threadedly connected with the pressing lock ring 15, which restricts the positioning ring 16 from moving axially, and also restricts the observation gun 2 from moving axially. On the basis of Example 1, the positioning ring 16 and the limiting lock ring 17 further increase the restriction on the axial movement of the observation gun 2, playing a double insurance role.

[0093] Example 3

[0094] like Fig.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.

[0095] Example 4

[0096] like Fig.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.

[0097] 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.

[0098] Example 5

[0099] like Fig.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.

[0100] like Fig.15 As shown, the anti-rotation mechanism 18 includes:

[0101] 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.

[0102] like Fig.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 .

[0103] The first half ring 184 and the second half ring 185 are both semi-ring structures, and the two are assembled into a complete ring structure. The inner diameter of the ring structure assembled by the first anti-rotation fixing clamp 181 is slightly smaller than the outer diameter of the observation gun 2. The inner diameter of the ring structure assembled by the second anti-rotation fixing clamp 182 is slightly smaller than the outer diameter of the outer sleeve 3. At the joint of the first half ring 184 and the second half ring 185, there is a detachable connecting member to tighten and fix the two half rings into a complete ring structure.

[0104] The detachable connecting member can be: a through hole and a screw rod penetrating the side walls of the first half ring and the second half ring; the through hole has an internal thread; the screw rod passes through the through hole and uses a threaded connection to combine the first half ring and the second half ring into an annular structure.

[0105] The detachable connecting member may also be: one end of the first half ring and the second half ring are pin-connected, and the other end is snap-connected.

[0106] The function of the detachable connecting component is to tighten and fix the two half rings into a complete ring structure and lock the observation gun or the outer sleeve. Other connection methods with this function do not deviate from the spirit and scope of the technical solution of this embodiment.

[0107] The rod inserting ring 186 is an annular structure, and its axial direction is parallel to the axial direction of the annular structure formed by splicing the first half ring 184 and the second half ring 185. The outer wall of the annular structure of the rod inserting ring 186 is fixedly connected to the outer wall of the second half ring 185. The inner diameter of the annular structure of the rod inserting ring 186 is slightly larger than the outer diameter of the fixed rod 183.

[0108] like Fig.17 As 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 an annular structure, and its outer diameter is slightly larger than the inner diameter of the annular 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 head 188 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 clamp 181 are spliced ​​and sleeved on the observation gun 2, and the two half rings are fixed and tightly embraced by the connection mechanism, so that the first anti-rotation fixing clamp 181 is relatively fixed to the observation gun 2, and the observation gun 2 cannot rotate or move along the axial direction relative to the first anti-rotation fixing clamp 181; the two half rings of the second anti-rotation fixing clamp 182 are spliced ​​and sleeved on the outer sleeve 3, and the two half rings are fixed and tightly embraced by the connection mechanism, so that the first anti-rotation fixing clamp 181 is relatively fixed to the outer sleeve 3, and the outer sleeve 3 cannot rotate or move along the axial direction relative to the second anti-rotation fixing clamp 182. When the first anti-rotation fixing clamp 181 and the second anti-rotation fixing clamp 182 are fixed, it is necessary to ensure that the axis of the rod ring 186 thereon is in a straight line, and the spacing between the two anti-rotation fixing clamps is less than the length of the fixed rod body 187. Then, the fixed plug rod 183 is inserted into the plug rod ring 186 of the first anti-rotation fixing clamp 181 and the second anti-rotation fixing clamp 182; a pin or other similar device is used to pass through the fixed plug rod through hole 189 and fix it. Since the diameter of the fixed plug rod head 188 is larger than the inner diameter of the plug rod ring 186, it cannot pass through the plug rod ring 186, and the fixed plug rod through hole 189 cannot pass through the plug rod ring 186 after the pin is inserted. Therefore, after passing through the two anti-rotation fixing clamps, the fixed plug rod 183 will remain in the position of passing through the two plug rod rings 186. The fixed plug rod 183 can prevent the two anti-rotation fixing clamps from rotating relative to each other, thereby preventing the observation gun 2 from rotating relative to the outer sleeve 3.

[0110] The function of the fixed rod head 188 and the fixed rod through hole 189 is to prevent the fixed rod 183 from escaping from the two anti-rotation fixing clamps. In order to achieve the above purpose, the fixed rod head 188 and the fixed rod through hole 189 can also be implemented by other structures, such as a column with a length greater than the inner diameter of the rod ring 186, a nut with an outer diameter greater than the inner diameter of the rod ring 186, and a threaded connection with one or both ends of the fixed rod body 187, etc. These technical means do not deviate from the spirit and scope of the technical solution of this embodiment.

[0111] Example 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 rear end, and a portion of the first component is inserted into the second component from the rear end of the second component.

[0113] The connection structure for 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 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. In this way, the observation gun 2 described above is actually a specific embodiment of the first component, and the outer sleeve 3 is actually a specific embodiment of the second component. 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 component and the second component.

[0114] The connection structure may include:

[0115] The base 11 has a through passage that allows the first member to pass through and has a first annular step portion 111 extending inwardly formed on its inner wall; the base 11 can be detachably connected to the rear end of the second member or can be integrally formed with the second member at the rear end of the second member;

[0116] The elastic pressing ring 13 has a substantially rectangular or square cross section. The elastic pressing 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 pressing ring 13 has a first state and a second state. In the first state, the elastic pressing ring 13 can slide relative to the first member along the length direction of the first member. In the second state, the elastic pressing ring 13 is compressed to reduce its inner diameter, thereby holding the first member tightly so that the first member cannot substantially move relative to the elastic pressing ring 13.

[0117] The pressure ring 14 has a through passage that allows the first component to pass through; when assembled, the pressure ring 14 enters the through passage of the base 11 and presses against the elastic pressure ring 13, so that the elastic pressure ring 13 is between the pressure ring 14 and the first annular step 111 of the base 11;

[0118] A clamping lock ring 15, having a through passage capable of allowing the first member to pass through and having a second annular step portion 151 formed on its inner wall suitable for abutting against the clamping ring 14, and the clamping lock ring 15 can be detachably connected to the base 11;

[0119] During assembly, the clamping ring 15 presses the pressure ring 14 toward the elastic pressure ring 13 by the second annular step portion 151 during the process of being connected to the base 11, and the pressure ring 14 then compresses the elastic pressure ring 13, so that the elastic pressure ring 13 enters the second state from the first state.

[0120] Furthermore, the base 11 has an internal thread or an external thread so as to be threadedly connected to the second component.

[0121] Furthermore, the end face of the pressure ring 14 for pressing against the elastic pressure ring 13 and / or the first annular step portion 111 is formed as a slope relative to the elastic pressure ring 13, and the inclination direction of the slope is away from the elastic pressure ring 13 from the edge to the center of the elastic pressure ring 13.

[0122] Furthermore, the middle section of the outer surface of the pressure ring 14 has an annular groove 142; the base 11 has a first through hole 114 penetrating through its side wall for receiving the limiter;

[0123] During assembly, the limiter passes through the first through hole 114 and extends into the groove 142 of the pressure ring 14, and the width of the groove 142 is set to allow the pressure ring 14 to move within a predetermined range along the through channel of the base 11 but cannot move beyond the limit of the limiter.

[0124] Furthermore, the connection structure also includes:

[0125] A positioning ring 16, which can be sleeved on the first member and can be detachably connected to the first member, so that the positioning ring 16 is substantially unable to move along the length direction of the first member relative to the first member; and

[0126] The limiting locking ring 17 has a third annular step portion 171 and can be detachably connected to the clamping locking ring 15;

[0127] During assembly, the limiting locking ring 17 is connected to the clamping locking ring 15 , so that the positioning ring 16 is located between the third annular step portion 171 of the limiting locking ring 17 and the end surface of the clamping locking ring 15 to limit the movement of the positioning ring 16 .

[0128] Further, the positioning ring 16 has an internal thread so as to be threadedly connected to the first component; 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 component with the fastener.

[0129] Furthermore, the connection structure also includes:

[0130] The sealing ring 12 has a substantially circular or elliptical cross section;

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

[0132] Furthermore, the annular groove 112 of the base 11 is located on the side of the first annular step portion 111 opposite to the elastic pressure ring 13 .

[0133] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the present application and are not intended to limit it. Although the present application is described in detail with reference to the embodiments, a person skilled in the art should understand that any modification or equivalent replacement of the technical solution of the present application does not depart from the spirit and scope of the technical solution of the present application and should be included in 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.

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 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.

4. The connection structure according to claim 3, 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.

5. The connection structure according to claim 3, 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.

6. The connection structure according to claim 3, 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.

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

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