Anti-rotation equipment and furnace observation device

Abstract

The utility model provides anti-rotation equipment and a kiln observation device. The anti-rotation equipment and the kiln observation device are used for preventing an observation gun inserted into an outer sleeve from rotating. The anti-rotation equipment comprises a cylindrical fixed insertion rod, a fixed insertion rod and a movable insertion rod, stop structures are arranged at the two ends of the fixed insertion rod; the first anti-rotation fixing clamp and the second anti-rotation fixing clamp are the same in structure; each of the first anti-rotation fixing clamp and the second anti-rotation fixing clamp comprises a first semi-ring and a second semi-ring which can be combined into an annular structure through a detachable connecting component; the insertion rod ring is of an annular structure and can allow the fixed insertion rod to be inserted into the annular structure; the outer wall of the second semi-ring is fixed; the axis of the inserting rod ring is parallel to the axis of the annular structure formed by combining the first half ring and the second half ring. The anti-rotation device has the advantages that the anti-rotation device is simple in structure, convenient to operate and capable of being rapidly assembled, and rotation between the observation gun and the outer sleeve is prevented.

Description

Technical Field

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

[0002] Closed industrial furnaces, such as blast furnaces, have high temperatures, high pressures, and high dust levels within them, making observation through observation windows difficult. To address this, various detection devices have been proposed to obtain information about the furnace interior, such as infrared cameras and microwave scanners. Some of these detection devices are located outside the furnace shell, transmitting and / or receiving detection signals through observation windows. However, dust accumulation on these windows can hinder detection. Consequently, the concept of placing detection elements, such as cameras and other sensors, within the furnace has been proposed.

[0003] Chinese patent publication number CN1156149C discloses an insertable furnace camera for observing the interior of a furnace. The camera includes a camera gun, a tubular cooler, a sealing valve, and a sealing sleeve (connecting structure). A camera and a temperature measuring element are mounted 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, placing the camera and temperature measuring element at the front end of the camera gun inside the blast furnace. Because the camera gun is sealed by both the sealing sleeve and the sealing valve, during blast furnace production, the camera gun can be pulled out between the sealing valve and the sealing sleeve, the sealing valve closed, and then the camera gun can be pulled out of the sealing sleeve for inspection and maintenance. During the process of pulling the camera gun out of the sealing sleeve, the seal must be maintained as much as possible to prevent leakage of high-pressure flue gas or dust from the furnace.

[0004] Chinese patent application publication number CN118655696A proposes a laser scanning device, which may include a laser gun and an outer sleeve into which it is inserted. The laser scanning device can be installed in an industrial furnace, such as a blast furnace, with its front end extending into the furnace and its rear end located outside. Laser light emitted from the front end can scan the furnace to obtain information about the interior. The laser gun is used to transmit laser light generated by a laser generator outside the furnace into the furnace. The outer sleeve protects the laser gun, allowing it to withstand the harsh environment inside the furnace and also provides other auxiliary and support functions. In one embodiment of the laser gun, a laser transmission line extends within the laser gun's elongated barrel and transmits the laser light. After being collimated by a collimator, the laser light is reflected by a reflector into the furnace. A motor drive assembly drives the reflector frame containing the reflector to rotate, allowing scanning operations within a predetermined scanning angle range. This application relates to modifications and / or improvements to the laser scanning device disclosed in the Chinese patent application, and the entire contents of the patent application are hereby incorporated by reference into this specification. Utility Model Content

[0005] The purpose of this application is to overcome the defect in the prior art that the observation gun and the outer sleeve are prone to rotation, which affects observation.

[0006] In order to achieve the above-mentioned purpose, the present application proposes an anti-rotation device for preventing a sight gun inserted into an outer sleeve from rotating; the anti-rotation device comprises:

[0007] A cylindrical fixed rod 183 having stop structures at both ends of the fixed rod 183;

[0008] The first anti-rotation fixing clip 181 and the second anti-rotation fixing clip 182 have the same structure; the first anti-rotation fixing clip 181 and the second anti-rotation fixing clip 182 both include:

[0009] A first half ring 184 and a second half ring 185 that can be joined into an annular structure by a detachable connecting member; and

[0010] The rod ring 186 is an annular structure that allows the fixed rod 183 to be inserted into the annular structure; it is fixed to the outer wall of the second half ring 185; the axis of the rod ring 186 is parallel to the axis of the annular structure formed by the first half ring 184 and the second half ring 185;

[0011] During assembly, the annular structure formed by the first half ring 184 and the second half ring 185 of the first anti-rotation fixing clip 181 is sleeved on the observation gun 2, and the first anti-rotation fixing clip 181 is fixedly connected to the observation gun 2 through a detachable connecting member; the annular structure formed by the first half ring 184 and the second half ring 185 of the second anti-rotation fixing clip 182 is sleeved on the outer sleeve 3, and the second anti-rotation fixing clip 182 is fixedly connected to the outer sleeve 3 through a detachable connecting member; at this time, the first half ring 184 and the second half ring 185 of the second anti-rotation fixing clip 182 are sleeved on the outer sleeve 3, and the second anti-rotation fixing clip 182 is fixedly connected to the outer sleeve 3 through a detachable connecting member. The axis of the rod ring 186 of the first anti-rotation fixing clip 181 is collinear with the axis of the rod ring 186 of the second anti-rotation fixing clip 182, and the distance between the first anti-rotation fixing clip 181 and the second anti-rotation fixing clip 182 is less than the length of the fixed rod 183; the fixed rod 183 is inserted into the rod ring 186 of the first anti-rotation fixing clip 181 and the rod ring 186 of the second anti-rotation fixing clip 182, and the stop structures at both ends of the fixed rod 183 prevent the fixed rod 183 from falling out of the rod ring 186.

[0012] As an improvement to the above anti-rotation device, the detachable connecting member includes:

[0013] A through hole and a screw extending through the side walls of the first half ring 184 and the second half ring 185;

[0014] The through hole has an internal thread;

[0015] The screw passes through the through hole and connects the first half ring 184 and the second half ring 185 into an annular structure by threaded connection.

[0016] As an improvement to the above anti-rotation device, the detachable connecting member is:

[0017] The first half ring 184 and the second half ring 185 are connected by a pin at one end and by a snap at the other end.

[0018] As an improvement to the above anti-rotation device, the stop structure includes:

[0019] An annular structure fixed to one end of the fixed rod 183 and having a diameter larger than the inner diameter of the rod ring 186; and

[0020] A through hole at the other end of the fixed insertion rod 183 and a pin shaft matched with the through hole.

[0021] The present application also provides a furnace observation device, which includes the above-mentioned anti-rotation device.

[0022] Compared with the existing technology, the advantages of this application are:

[0023] The anti-rotation device of the present application has a simple structure, is easy to operate, can be quickly assembled, and prevents rotation between the observation gun and the outer sleeve. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 Shown is a schematic diagram of a furnace observation device;

[0025] Figure 2 Shown is a cross-sectional view of the sealing sleeve in a tightened state according to Example 1 of the present application;

[0026] Figure 3 Shown is an exploded view of the sealing sleeve of Example 1 of the present application;

[0027] Figure 4 Shown is a cross-sectional view of the base of Example 1 of the present application;

[0028] 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;

[0029] Figure 6 Shown is a cross-sectional view of the compression lock ring of Example 1 of the present application;

[0030] Figure 7 The figure shows the contact position details of the pressure ring, base and elastic pressure ring of Example 1 of the present application;

[0031] Figure 8 Shown is a cross-sectional view of the sealing sleeve in a tightened state according to Example 2 of the present application;

[0032] Figure 9 Shown is an exploded view of the sealing sleeve of Example 2 of the present application;

[0033] Figure 10 Shown is a stereoscopic view of the positioning ring of Example 2 of the present application;

[0034] Figure 11 Shown is a cross-sectional view of the position limiting locking ring of Example 2 of the present application;

[0035] Figure 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;

[0036] Figure 13 Shown is a structural diagram of the sealing sleeve of Example 4 of the present application;

[0037] Figure 14 Shown is a diagram of the connection structure of Example 5 of the present application;

[0038] Figure 15 Shown is a structural diagram of the anti-rotation mechanism of Example 5 of the present application;

[0039] Figure 16 Shown is a structural diagram of the anti-rotation fixing clip of Example 5 of the present application;

[0040] Figure 17 Shown is a structural diagram of the fixed insertion rod of Example 5 of the present application.

[0041] Figure ID:

[0042] 1. Sealing sleeve 2. Observation gun

[0043] 3. Outer sleeve 11. Base

[0044] 12. Sealing ring 13. Elastic pressure ring

[0045] 14. Pressing ring 15. Pressing locking ring

[0046] 16. Positioning ring 17. Limit locking ring

[0047] 18. Anti-rotation mechanism

[0048] 111. First annular step 112. Annular groove

[0049] 113, boss side 114, first through hole

[0050] 141, pressure ring end face 142, groove

[0051] 151, second annular step portion 161, second through hole

[0052] 171, third annular step portion 181, first anti-rotation fixing clip

[0053] 182. Second anti-rotation fixing clip 183. Fixed plug rod

[0054] 184, first half ring 185, second half ring

[0055] 186, rod ring 187, fixed rod body

[0056] 188, fixed rod head 189, fixed rod through hole DETAILED DESCRIPTION

[0057] The technical solution of this application is described in detail below with reference to the accompanying drawings.

[0058] 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 portion in each figure is referred to as the tail end portion, and the right end portion is referred to as the head end portion. The outer sleeve 3 may have an inner cavity extending along its length direction for receiving the inserted observation gun 2 therein. The observation gun 2 may be inserted into the outer sleeve 3 from the tail end portion, and until the head end of the observation gun 2 reaches the head end portion of the outer sleeve 3, thereby forming a structure as shown in FIG. Figure 1 The furnace observation device is shown in an assembled state. The tail 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 by 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 drawn schematically so that the arrangement of the observation gun 2 in the outer sleeve 3 can be seen more clearly.

[0059] Figure 1 The kiln observation device 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 positioned outside. During operation, the head of the observation gun 2 includes observation equipment, such as a camera or laser, to scan the interior of the blast furnace to obtain information. The outer sleeve 3 protects the observation gun 2 and provides other auxiliary and support functions. Although the kiln observation device will be described below using a blast furnace as an example, it is understood that the device can also be used with other types of industrial kilns or other applications requiring internal observation.

[0060] The connection structure includes a sealing sleeve 1. The sealing sleeve 1 can be disposed at the rear end of the outer sleeve 3 to secure 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 maintain the relative position of the observation gun 2 and the outer sleeve 3, preventing smoke, dust, and other substances within the blast furnace from escaping through the gap between the observation gun 2 and the outer sleeve 3.

[0061] A valve can also be provided in the middle of the outer sleeve 3. When the sight gun 2 is pulled out of the outer sleeve 3, the sealing sleeve 1 and the valve provide two seals along the withdrawal path of the sight gun 2. Thus, during blast furnace production, the tip of the sight gun 2 can be pulled out to a position between the sealing sleeve 1 and the valve, the valve then closed, and the sight gun 2 can be pulled out of the outer sleeve 3 through the sealing sleeve 1. Similarly, to insert the sight gun 2, the tip of the sight gun 2 can be first inserted between the sealing sleeve 1 and the valve, the valve then opened, and the sight gun 2 can be inserted through the valve further into the outer sleeve 3. This allows for easy insertion and removal of the sight gun 2 during blast furnace production while preventing furnace contents from escaping through the outer sleeve 3.

[0062] Example 1

[0063] like Figure 2-Figure 6 FIG2 is a structural diagram of a sealing sleeve according to an embodiment of the present invention. 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.

[0064] like Figure 4 As shown, the base 11 is a hollow cylindrical 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 connection can be made by internal threads of the base 11 and external threads of the outer sleeve 3, or by external threads of the base 11 and internal threads of the outer sleeve 3. 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.

[0065] 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 a size slightly larger than the outer diameter of the observation gun 2. The middle of the first annular step portion 111 has multiple annular grooves 112. During installation, multiple sealing rings 12 are embedded one-to-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 annular extension (refer to Figure 2 When the sight gun 2 is inserted into the base 11, it squeezes the sealing ring 12, causing it to deform and seal the gap between the sight gun 2 and the base 11. When the sight gun 2 is withdrawn from the base 11, the sealing ring 12 ensures a tight seal between the sight gun 2 and the base 11, preventing high-pressure flue gas or dust from the blast furnace from escaping.

[0066] The rear end portion of the base 11 has an external thread, which can be threadedly connected to the clamping lock ring 15 .

[0067] The base 11 is made of metal.

[0068] The elastic pressure ring 13 is an annular rubber ring with a rectangular or square cross section. The outer diameter of the elastic pressure ring 13 is slightly smaller than the inner diameter of the tail end of the base 11. The inner diameter of the elastic pressure 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 tail end portion of the base 11 and is tightly attached to the side of the first annular step portion 111 . At this time, the elastic pressing ring 13 is in the first state.

[0069] The pressure ring 14 is a hollow cylindrical structure. Its maximum outer diameter is slightly smaller than the inner diameter of the rear end of the base 11. The inner surface of the pressure ring 14 is smooth, and its inner diameter is slightly larger than the outer diameter of the observation gun 2. During installation, the pressure ring 14 is placed within the rear end of the base 11. The bottom surface of the pressure ring 14 compresses the elastic pressure ring 13, causing it to deform. At this point, the elastic pressure ring is in the second state. The pressure ring 14 is made of metal.

[0070] like Figure 6 As shown, the head of the compression ring 15 has internal threads. The internal threads extend deep into the interior of the compression ring 15, where they terminate in a second, inwardly projecting annular step 151. This inwardly projecting second annular step 151 reduces the inner diameter of the rear end of the compression ring 15 to a size slightly larger than the outer diameter of the observation gun 2. During installation, the internal threads at the head of the compression ring 15 connect with the external threads at the rear end of the base 11, with the second annular step 151 compressing the bottom surface of the compression ring 14. The compression ring 15 is made of metal.

[0071] like Figure 7As shown, the first annular step portion 111 of the base 11 has a certain inclination angle relative to the vertical direction on the boss side surface 113 on the side adjacent to the elastic pressure ring 13. When the pressure ring 14 does not compress the elastic pressure ring 13, the gap between the boss side surface 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 on the pressure ring end surface 141 adjacent to the elastic pressure ring 13. When the pressure ring 14 and the first annular step portion 111 compress the elastic pressure ring 13, the contact area between the pressure ring end surface 141 and the boss side surface 113 and the elastic pressure ring 13 is very small, resulting in a high pressure, which can easily deform the elastic pressure ring 13. When elastic pressure ring 13 deforms, it cannot expand because the three sides immediately adjacent to base 11 and pressure ring 14 are made of rigid material. Instead, it can only expand more toward observation gun 2 and into the gap between observation gun 2, pressure ring 14, and first annular step 111. This creates a larger contact area between elastic pressure ring 13 and observation gun 2, generating greater friction between the two, preventing movement between the observation gun 2 and elastic pressure ring 13. The pressure ring 14 and base 11 tightly compress the elastic pressure ring 13, preventing it from moving relative to the pressure ring 14 and base 11, and thus preventing the observation gun 2 from axial movement or rotation.

[0072] The cross-section of the elastic pressure ring 13 is preferably rectangular or square. Compared to a circular or oval cross-section, a square pressure ring has a larger contact area with both sides, resulting in greater deformation during the squeezing process, making it easier to lock the observation gun. If the cross-section of the pressure ring is circular or oval, during the locking and squeezing process, the circular or oval cross-section of the pressure ring will first deform into a square shape to fill the space before transmitting pressure to the observation gun to lock it.

[0073] The sealing sleeve installation process of this embodiment is as follows: First, insert multiple sealing rings 12 one by one into the annular groove 112 of the base 11, then connect the head end of the base 11 to the tail end of the outer sleeve 3. Insert the elastic pressure ring 13 from the tail end of the base 11 into the base 11, tightly against the side of the first annular step 111. Insert the pressure ring 14 from the tail end of the base 11 into the base 11, making contact with the elastic pressure ring 13. Thread the head end of the locking ring 15 into the tail end of the base 11, but do not tighten. 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 detachable. 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 insertion 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 squeezed by the observation gun 2 and deformed, sealing the gap between the observation gun 2 and the sealing sleeve 1. After inserting the sight gun 2 into the outer sleeve 3, tighten the threaded connection between the compression ring 15 and the base 11. At this point, the second annular step 151 of the compression ring 15 applies axial pressure to the compression ring 14, causing it to compress the elastic pressure ring 13. This elastic pressure ring 13 elastically deforms, compressing the sight gun 2. The combined action of the sealing ring 12 and the elastic pressure ring 13 on the sight gun 2 completely seals the gap between the sight gun 2 and the sealing sleeve 1, preventing the sight gun 2 from rotating or moving axially.

[0074] When it is necessary to remove the observation gun 2 from the outer sleeve 3, the first step is to loosen the compression ring 15, thereby reducing the pressure of the compression ring 15 on the pressure ring 14. The pressure of the pressure ring 14 on the elastic pressure ring 13 also decreases, causing the elastic pressure ring 13 to return to its original shape, reducing the contact area and pressure with the observation gun 2. At this point, the observation gun 2 can be rotated and axially withdrawn, but the gap between the observation gun 2 and the sealing sleeve 1 remains closed due to the presence of the sealing ring 12, preventing the high-pressure flue gas and dust in the furnace from escaping.

[0075] Example 2

[0076] like Figures 8-11 , which is a structural diagram of Example 2 of the sealing sleeve provided by this application.

[0077] The sealing sleeve provided in this embodiment is in addition to the sealing sleeve described in Example 1, with a positioning ring 16 and a limiting locking ring 17 added, and the shape of the pressing locking ring 15 is also different.

[0078] The compression lock ring 15 of this embodiment further has an external thread at the rear end portion.

[0079] like Figure 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 thread 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 an internal thread. 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 jackscrew or a screw.

[0080] like Figure 11 As shown, the head end of the limiting lock ring 17 has an internal thread for connecting with the external thread of the compression lock ring 15. The tail end of the limiting lock ring 17 has an inwardly protruding third annular step 171. The inner diameter of the third annular step 171 is slightly larger than the outer diameter of the observation gun 2.

[0081] The sealing sleeve installation process of this embodiment is as follows: First, assemble the sealing ring 12, base 11, elastic pressure ring 13, pressure ring 14, and compression lock ring 15 in the same manner as in Example 1. Then, sequentially place the positioning ring 16 and the limiting lock ring 17 on the rear end of the compression lock ring 15. After tightening the compression lock ring 15, the positioning ring 16 is threadedly connected to the observation gun 2 and rotated to the appropriate position. A fastener is screwed into the second through hole 161 of the positioning ring 16 to tighten against the observation gun 2. The internal thread of the limiting lock ring 17 is then connected and tightened to the external thread of the compression lock ring 15.

[0082] Compared to the sealing sleeve of Example 1, this embodiment includes a newly added positioning ring 16 that cooperates with a jackscrew to securely fasten positioning ring 16 to observation gun 2, preventing axial movement or rotation relative to observation gun 2. A stop lock ring 17, threadedly connected to the compression lock ring 15, restricts axial movement of positioning ring 16, and consequently, observation gun 2. Building upon Example 1, positioning ring 16 and stop lock ring 17 further restrict axial movement of observation gun 2, providing a dual safeguard.

[0083] Example 3

[0084] like Figure 12As shown, in Example 3 of the present application, the tail end portion of the base 11 has one or more first through holes 114 that penetrate the side wall; the first through holes 114 have internal threads. The middle section of the outer side of the pressure ring 14 has an annular groove 142. After the pressure ring 14 enters the tail end portion of the base 11, the limiting member 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 limiting member, the pressure ring 14 can only move within the limited space of the width of the groove 142, preventing it from falling out of the tail end portion of the base 11. The limiting member can be a top screw, a screw, etc.

[0085] Example 4

[0086] like Figure 13 As shown, compared with Example 2, this embodiment omits the elastic pressure ring 13, the pressure ring 14, and the clamping lock ring 15, and the limiting lock ring 17 is threadedly connected to the rear end of the base 11. Since the rear end of the base 11 no longer needs to accommodate the elastic pressure ring 13 and the pressure ring 14, the rear end of the base 11 can be shortened or even omitted to shorten the length of the base 11.

[0087] The sealing sleeve of this embodiment 4 omits the elastic pressure ring 13, the pressure ring 14 and the clamping lock ring 15, so it 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.

[0088] Example 5

[0089] like Figure 14 As shown, the connection structure further includes an anti-rotation mechanism 18 for preventing the observation gun 2 from rotating relative to the outer sleeve 3.

[0090] like Figure 15 As shown, the anti-rotation mechanism 18 includes:

[0091] A first anti-rotation fixing clip 181 for fixing and clamping the observation gun 2, a second anti-rotation fixing clip 182 for fixing and clamping the outer sleeve 3, and a fixing 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 rod 183 are all made of rigid material.

[0092] like Figure 16 As shown, the first anti-rotation fixing clamp 181 and the second anti-rotation fixing clamp 182 have the same structure, both including a first half ring 184 , a second half ring 185 and a rod inserting ring 186 .

[0093] The first half ring 184 and the second half ring 185 are both semi-annular structures, and when combined, they form a complete annular structure. The inner diameter of the annular structure formed by the first anti-rotation clamp 181 is slightly smaller than the outer diameter of the observation gun 2. The inner diameter of the annular structure formed by the second anti-rotation clamp 182 is slightly smaller than the outer diameter of the outer sleeve 3. At the junction of the first half ring 184 and the second half ring 185, a detachable connecting member tightens and secures the two halves to form a complete annular structure.

[0094] The detachable connecting member can be: a through hole and a screw rod passing through 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.

[0095] The detachable connecting member can also be: the first half ring and the second half ring are connected by a pin at one end and by a snap at the other end.

[0096] The function of the detachable connecting member is to tighten and fix the two half rings into a complete ring structure and lock the observation gun or outer sleeve. Other connection methods with this function do not depart from the spirit and scope of the technical solution of this embodiment.

[0097] Rod ring 186 is an annular structure whose axis is parallel to the axis 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 rod ring 186 is fixedly connected to the outer wall of the second half ring 185. The inner diameter of the annular structure of rod ring 186 is slightly larger than the outer diameter of the fixed rod 183.

[0098] like Figure 17 As shown, fixed rod 183 includes a cylindrical fixed rod body 187. One end of the column of fixed rod body 187 has a fixed rod head 188. Fixed rod head 188 is an annular structure with an outer diameter slightly larger than the inner diameter of the annular structure of rod ring 186. The column of fixed rod body 187 has a fixed rod through hole 189 at the opposite end of the column relative to fixed rod head 188. Fixed rod through hole 189 is a through hole that passes through fixed rod head 188 in the diametrical direction.

[0099] 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 and the observation gun 2 are relatively fixed, and the observation gun 2 cannot rotate or move along the axis 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 and the outer sleeve 3 are relatively fixed, and the outer sleeve 3 cannot rotate or move along the axis 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 distance between the two anti-rotation fixing clamps is less than the length of the fixed rod body 187. Then, the fixed rod 183 is inserted into the rod rings 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 rod through hole 189 and fix it. Because the diameter of the fixed rod head 188 is larger than the inner diameter of the rod ring 186, it cannot pass through the rod ring 186. After the pin is inserted into the fixed rod through hole 189, it cannot pass through the rod ring 186 again. Therefore, after passing through the two anti-rotation fixing clamps, the fixed rod 183 will remain in the position of passing through the two rod rings 186. The fixed 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.

[0100] The function of the fixed rod head 188 and the fixed rod through hole 189 is to prevent the fixed rod 183 from falling out of 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 end 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.

[0101] Example 6

[0102] 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 portion, and a portion of the first component is inserted into the second component from the rear end portion of the second component.

[0103] The connection structure for the observation gun 2 and outer sleeve 3 described above is actually applicable 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 rear end, and a portion of the first component is inserted into the second component through the rear end. 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. Furthermore, the features of the connection structure described above for the observation gun 2 and outer sleeve 3 are applicable to this general connection structure for first and second components.

[0104] The connection structure may include:

[0105] The base 11 has a through passage for allowing the first member to pass through and has a first annular step 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;

[0106] The elastic pressure ring 13 has a substantially rectangular or square cross-section. The elastic pressure ring 13 can be sleeved on the first member and can enter the base 11 and abut against the first annular step 111 during assembly. The elastic pressure ring 13 has a first state and a second state. In the first state, the elastic pressure ring 13 can slide relative to the first member along the length of the first member. In the second state, the elastic pressure ring 13 is compressed and its inner diameter becomes smaller, thereby tightly holding the first member so that the first member is substantially unable to move relative to the elastic pressure ring 13.

[0107] The pressure ring 14 has a through-passage capable of allowing the first component to pass through; during assembly, 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 located between the pressure ring 14 and the first annular step 111 of the base 11;

[0108] A compression lock ring 15 has a through passage capable of allowing the first member to pass through and is formed with a second annular step portion 151 suitable for abutting against the compression ring 14 on its inner wall. The compression lock ring 15 can be detachably connected to the base 11;

[0109] 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.

[0110] Furthermore, the base 11 has an internal thread or an external thread so as to be threadedly connected to the second component.

[0111] 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 along the direction from the edge to the center of the elastic pressure ring 13.

[0112] 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 limit member;

[0113] During assembly, the limiting member 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 limiting member.

[0114] Furthermore, the connection structure also includes:

[0115] a positioning ring 16 capable of being sleeved on the first member and detachably connected to the first member such that the positioning ring 16 is substantially unable to move relative to the first member along the length direction of the first member; and

[0116] The limiting lock ring 17 has a third annular step portion 171 and can be detachably connected to the clamping lock ring 15;

[0117] During assembly, the limiting lock ring 17 is connected to the pressing lock ring 15 so that the positioning ring 16 is located between the third annular step 171 of the limiting lock ring 17 and the end surface of the pressing lock ring 15 to limit the movement of the positioning ring 16 .

[0118] Furthermore, 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.

[0119] Furthermore, the connection structure also includes:

[0120] The sealing ring 12 has a substantially circular or elliptical cross section;

[0121] The inner wall of the base 11 is formed with an annular groove 112 for accommodating the sealing ring 12 .

[0122] Furthermore, the annular groove 112 of the base 11 is located on the side of the first annular step 111 opposite to the elastic pressure ring 13 .

[0123] Finally, it should be noted that the above embodiments are intended only to illustrate the technical solutions of this application and are not intended to limit the scope of the present invention. Although this application has been described in detail with reference to the embodiments, it should be understood by those skilled in the art that modifications or equivalent substitutions to the technical solutions of this application do not depart from the spirit and scope of the technical solutions of this application and should be encompassed by the claims of this application.

Claims

1. An anti-rotation device for preventing a sight gun inserted into an outer sleeve from rotating; characterized in that: The anti-rotation device comprises: A columnar fixed rod (183); both ends of the fixed rod (183) have stop structures; A first anti-rotation fixing clip (181) and a second anti-rotation fixing clip (182) having the same structure; the first anti-rotation fixing clip (181) and the second anti-rotation fixing clip (182) both comprise: A first half ring (184) and a second half ring (185) that can be joined into an annular structure via a detachable connecting member; and The rod inserting ring (186) is an annular structure capable of allowing the fixed rod (183) to be inserted into the annular structure; it is fixed to the outer wall of the second half ring (185); the axis of the rod inserting ring (186) is parallel to the axis of the annular structure formed by the first half ring (184) and the second half ring (185); During assembly, the annular structure formed by combining the first half ring (184) and the second half ring (185) of the first anti-rotation fixing clamp (181) is sleeved on the observation gun (2), and the first anti-rotation fixing clamp (181) is fixedly connected to the observation gun (2) through a detachable connecting member; the annular structure formed by combining the first half ring (184) and the second half ring (185) of the second anti-rotation fixing clamp (182) is sleeved on the outer sleeve (3), and the second anti-rotation fixing clamp (182) is fixedly connected to the outer sleeve (3) through a detachable connecting member; at this time, the first anti-rotation fixing clamp (181) is sleeved on the outer sleeve (3), and the second anti-rotation fixing clamp (182) is fixedly connected to the outer sleeve (3) through a detachable connecting member. The axis of the rod ring (186) of the fixing clamp (181) and the axis of the rod ring (186) of the second anti-rotation fixing clamp (182) are collinear, and the distance between the first anti-rotation fixing clamp (181) and the second anti-rotation fixing clamp (182) is less than the length of the fixing rod (183); the fixing rod (183) is inserted into the rod ring (186) of the first anti-rotation fixing clamp (181) and the rod ring (186) of the second anti-rotation fixing clamp (182), and the stop structures at both ends of the fixing rod (183) prevent the fixing rod (183) from falling out of the rod ring (186).

2. The anti-rotation device 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 half ring (184) and the second half ring (185); The through hole has an internal thread; The screw rod passes through the through hole and is threadedly connected to combine the first half ring (184) and the second half ring (185) into an annular structure.

3. The anti-rotation device according to claim 1, characterized in that: The detachable connecting member is: The first half ring (184) and the second half ring (185) are connected by a pin at one end and by a snap connection at the other end.

4. The anti-rotation device according to claim 1, characterized in that: The stop structure includes: An annular structure fixed to one end of the fixed rod (183) and having a diameter larger than the inner diameter of the rod ring (186); and A through hole at the other end of the fixed insertion rod (183) and a pin shaft matched with the through hole.

5. A furnace observation device, characterized in that: The furnace observation device includes the anti-rotation device as described in any one of claims 1-4.

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