Length measuring equipment for fireproof cloth

Abstract

The invention relates to the technical field of cloth measuring devices, in particular to length measuring equipment for fireproof cloth, which comprises a support frame, a driving rod rotatably mounted on the outer surface of the support frame, a detection head fixedly mounted on the outer surface of the support frame, an auxiliary box rotatably mounted on the outer surface of the support frame, and a smearing device arranged at the bottom of the auxiliary box. A buffer bag and a sponge structure on the outer surface of the buffer bag are arranged, liquid is automatically and evenly smeared to the outer surface of the fireproof cloth through a transmission system, the fireproof cloth is made to be in a wet state all the time, and therefore the stability of an optical reflection signal is enhanced, and accurate detection of a detection head on the reflection intensity is facilitated; and the precision and reliability of length measurement of the fireproof cloth are improved.

Description

Technical Field

[0001] This invention relates to the field of fabric measuring device technology, specifically a length measuring device for fireproof fabric. Background Technology

[0002] Fireproof fabric is a specially treated industrial fabric with high temperature resistance and flame retardant properties. It is widely used in fire protection, welding insulation, building fire protection and other fields. In the production and processing of fireproof fabric, the length of the fabric needs to be accurately measured in order to cut, package or sell by fixed length.

[0003] Fire-resistant fabrics have a certain degree of hydrophobicity and uneven reflectivity. In a dry state, the reflected signal received by the optical probe is easily affected by surface roughness, fiber refraction angle, and ambient light interference, resulting in large signal fluctuations and affecting the stability and accuracy of length measurement. Some technical solutions attempt to improve signal quality by increasing light source power or improving detection sensitivity, but it is still difficult to maintain stable detection during continuous fabric rolling. Therefore, this application proposes a length measuring device for fire-resistant fabrics. Summary of the Invention

[0004] The purpose of this invention is to provide a length measuring device for fireproof fabrics to solve the problems mentioned in the background art.

[0005] To achieve the above objectives, the present invention provides the following technical solution: a length measuring device for fireproof fabric, comprising a support frame, a drive rod rotatably mounted on the outer surface of the support frame, and a probe fixedly mounted on the outer surface of the support frame to detect the movement speed and length of the fireproof fabric in real time. An auxiliary box is rotatably mounted on the outer surface of the support frame, and a coating device is provided at the bottom of the auxiliary box to form a water layer on the outer surface of the fireproof fabric. The water layer changes the reflectivity of the fireproof fabric. The probe captures changes in the intensity of reflected light on the surface of the fireproof fabric to achieve real-time monitoring of the fabric's movement state, thereby improving the accuracy and stability of length measurement. A throttling cylinder is fixedly mounted inside the auxiliary box, and an output cylinder is fixedly connected to the bottom end of the throttling cylinder. A pressure boosting cylinder is also fixedly connected inside the auxiliary box, and a diverter cylinder is fixedly connected to the output end of the pressure boosting cylinder.

[0006] As a further embodiment of the present invention, the coating device includes a buffer box, inside which a buffer bladder is installed, and the outer surface of the buffer bladder is wrapped with a sponge. The input end of the buffer box is connected to the output end of the throttling cylinder through a liquid guide tube. By setting up the buffer box, the buffer bladder and the outer sponge structure, the device can play the role of liquid storage and pressure stabilization when the liquid is output, so that the liquid can be evenly absorbed by the sponge and continuously coated on the surface of the fireproof cloth, thereby ensuring that the fireproof cloth remains moist during the measurement process.

[0007] As a further embodiment of the present invention, the liquid guide tube is fitted with a flow-blocking cylinder, the internal space of which divides the liquid guide tube into upper and lower sections. An expansion bladder is provided inside the flow-blocking cylinder, and an air tube is inserted inside the liquid guide tube. The input end of the air tube is connected to the buffer bladder, and the output end of the air tube is connected to the expansion bladder. A flow-blocking plug is fixedly connected to the upper end of the expansion bladder.

[0008] As a further embodiment of the present invention, an upper pressure cylinder is detachably connected to the end of the throttling cylinder away from the output cylinder. An isolation plate is fixedly installed on the inner end of the upper pressure cylinder, and a bellows is fixedly connected to the bottom end of the isolation plate. A movable sleeve is fitted inside the throttling cylinder, and a movable plug is provided below the movable sleeve. The upper end of the movable plug is connected to the bellows, and the outer surface of the movable plug is in close contact with the inside of the throttling cylinder.

[0009] As a further embodiment of the present invention, the movable plug and the output cylinder are connected by a return spring, the return spring provides an upward force for the movable plug, a support ring is fixedly installed at the inner end of the throttling cylinder, and multiple extrusion rods are rotatably installed on the outer surface of the support ring. The extrusion rods are arranged in a ring shape, a conical sleeve is provided above the movable plug, and the ends of the extrusion rods are in contact with the outer surface of the conical sleeve.

[0010] As a further embodiment of the present invention, a sealing sleeve is fixedly installed on the inner end of the output cylinder, a flow limiting tube is fixedly connected to the bottom end of the movable plug, the flow limiting tube is connected to the bellows, and the sealing sleeve is sleeved on the outer surface of the flow limiting tube. A discharge port is opened on the outer surface of the sealing sleeve, and multiple liquid outlet holes are opened on the outer surface of the flow limiting tube.

[0011] As a further embodiment of the present invention, a transmission shaft is provided inside the auxiliary box, and a booster impeller is rotatably mounted on the inner end of the booster cylinder. The transmission shaft and the drive shaft of the booster impeller are tensioned and sleeved together by a drive belt. By setting a transmission shaft inside the auxiliary box and using a drive belt to connect the transmission shaft and the drive shaft of the booster impeller, stable power transmission is achieved.

[0012] As a further embodiment of the present invention, an upper plug is fitted inside the flow divider, and a return pipe is fixedly connected to the outer surface of the flow divider. The output end of the return pipe is connected to the booster cylinder, and the input end of the return pipe is located below the upper plug. A middle plug and a flow-blocking block are respectively provided below the upper plug, and the upper plug, middle plug, and flow-blocking block are all connected by a support rod. A transmission pipe is fixedly connected to the outer surface of the flow divider. By setting a multi-stage separation structure of upper plug, middle plug, and flow-blocking block inside the flow divider, and linking them with the support rod, the liquid can form a graded pressure regulation and flow guiding effect in the flow divider. With the return pipe and transmission pipe set on the outer surface of the flow divider, the circulation and stable delivery of the liquid can be realized.

[0013] As a further embodiment of the present invention, an inlet pipe is fixedly connected to the outer surface of the diverter cylinder, and the inlet pipe corresponds to the transmission pipe. The middle layer plug is located between the inlet pipe and the transmission pipe. A support sleeve is fixedly installed at the inner end of the auxiliary box. A central rod is inserted inside the support sleeve. The central rod is connected to the flow blocking block by an auxiliary spring. The central rod is connected to the support sleeve by a guide spring.

[0014] Compared with the prior art, the beneficial effects of the present invention are: 1. When the present invention is working, by setting up a buffer bag and a sponge structure on its outer surface, the transmission system automatically and evenly applies liquid to the outer surface of the fireproof cloth, keeping the fireproof cloth in a moist state at all times, thereby enhancing the stability of the optical reflection signal, facilitating the accurate detection of the reflection intensity by the probe, and improving the accuracy and reliability of the fireproof cloth length measurement. 2. When this invention is in operation, if the probe cannot detect a water layer on the outer surface of the fireproof cloth, the internal control module will immediately issue an alarm signal and stop the measurement action, thereby promptly preventing slippage between the fireproof cloth and the drive rod due to dry friction. By preventing slippage, local high temperatures caused by frictional heat are effectively avoided, preventing the surface of the fireproof cloth from being burned or the drive rod from being worn, thus improving the service life and operational safety of the equipment; 3. By setting up a multi-stage hydraulic control structure including an upper plug, a middle plug, a movable sleeve, and a flow limiting tube, when the drive rod slips briefly or the booster impeller cannot provide sufficient pressure, the liquid can form a buffer pressure in the multi-stage chamber, allowing the liquid supply process to continue. This avoids the fireproof cloth surface from drying out due to interruption of liquid supply and ensures that the detector head can stably detect reflective signals. Attached Figure Description

[0015] Figure 1 A schematic diagram of a length measuring device for fireproof fabric; Figure 2 This is a schematic diagram of the internal structure of the auxiliary box; Figure 3 This is a schematic diagram of the structure of the throttling cylinder and the booster cylinder; Figure 4 This is a schematic diagram of the internal structure of the buffer box; Figure 5 This is a schematic diagram of the internal structure of the flow-blocking cylinder; Figure 6 This is a schematic diagram of the internal structure of the throttling cylinder and the upper pressure cylinder; Figure 7 This is a schematic diagram of the internal structure of the movable sleeve; Figure 8 This is a disassembled diagram of the movable plug and the output cylinder; Figure 9 This is a diagram showing the position and state of the contact wires; Figure 10 This is a schematic diagram of the internal structure of the booster cylinder; Figure 11 This is a schematic diagram of the internal structure of the flow divider. Figure 12 This is a disassembled diagram of the support sleeve and locking sleeve.

[0016] In the diagram: 1. Support frame; 2. Probe head; 3. Jet nozzle; 4. Drive rod; 5. Auxiliary box; 101. Buffer tank; 102. Buffer bladder; 103. Liquid guide tube; 104. Flow-blocking tube; 105. Flow guide plate; 106. Flow-blocking plug; 107. Expansion bladder; 108. Trachea; 201. Conductor shaft; 202. Pressure booster cylinder; 203. Drive belt; 204. Return pipe; 205. Flow divider cylinder; 206. Pressure booster impeller; 207. Flow baffle; 208. Middle layer plug; 209. Upper layer plug; 210. Auxiliary spring; 301. Upper pressure cylinder; 302. Throttling cylinder; 303. Transmission pipe; 304. Inlet pipe; 305. Transmission frame; 306. Movable sleeve; 307. Isolation plate; 308. Bellows; 309. Extrusion rod; 310. Conical sleeve; 311. Output cylinder; 312. Movable plug; 313. Return spring; 314. Flow limiting pipe; 315. Sealing sleeve; 316. Discharge port; 401. Support sleeve; 402. Mating ring; 403. Abutting screw; 404. Center rod; 405. Guide spring; 406. Ratchet; 407. Auxiliary sleeve; 408. Locking block; 409. Locking sleeve. Detailed Implementation

[0017] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0018] Example 1: Please refer to Figures 1-3A length measuring device for fireproof fabric includes a support frame 1. A drive rod 4 is rotatably mounted on the outer surface of the support frame 1 via a rotating shaft. An anti-slip rubber sleeve is fitted on the outer surface of the drive rod 4. The outer surface of the fireproof fabric contacts the anti-slip rubber sleeve, and as the fireproof fabric moves forward, the drive rod 4 rotates under the action of friction. A probe 2 is fixedly mounted on the outer surface of the support frame 1 by bolts. The probe 2 is a photoelectric sensor probe that calculates the amount of fabric movement by detecting changes in reflected light intensity. This device is a mature existing technology and will not be described in detail here. The probe 2 can detect the movement speed and length of the fireproof fabric in real time. An auxiliary box 5 is rotatably mounted on the outer surface of the support frame 1. Because the surface of the fabric has strong reflectivity and poor light transmittance, the light signal is easily interfered with, resulting in insufficient detection stability. To address this, the bottom of the auxiliary box 5 is equipped with a coating device to form a water layer on the outer surface of the fireproof fabric. This water layer changes the reflectivity of the fireproof fabric. The probe 2 captures the changes in the intensity of reflected light on the surface of the fireproof fabric to achieve real-time monitoring of the fabric's movement state, thereby improving the accuracy and stability of length measurement. After the fireproof cloth is detected by the detector head 2, the surface water layer needs to be removed. For this purpose, the air jet head 3 is fixedly installed on the support frame 1, which is connected to the compressor. The high-pressure and high-speed gas jetted out removes the water layer on the surface of the fireproof cloth. The auxiliary box 5 is equipped with a throttle cylinder 302 fixedly installed inside by clamps. The bottom end of the throttle cylinder 302 is fixedly connected to the output cylinder 311. The auxiliary box 5 is also fixedly connected to a booster cylinder 202. The output end of the booster cylinder 202 is fixedly connected to a flow divider cylinder 205.

[0019] like Figures 3-5 As shown, the application device includes a buffer box 101, inside which a buffer bladder 102 is installed, and the outer surface of the buffer bladder 102 is covered with a sponge. During operation, the outer surface of the sponge contacts the outer surface of the fireproof cloth. The input end of the buffer box 101 is connected to the output end of the throttling cylinder 302 through a liquid guide tube 103. The inner end of the buffer box 101 is provided with a guide plate 105, which contacts the sponge on the outer surface of the buffer bladder 102. The guide plate 105 is located at the output port of the liquid guide tube 103, so the liquid flowing out of the liquid guide tube 103 will be diverted by the guide plate 105 and evenly absorbed by the sponge. Finally, the sponge transfers the liquid to the outer surface of the fireproof cloth. The liquid guide tube 103 is fitted with a flow-blocking cylinder 104, the internal space of which divides the liquid guide tube 103 into upper and lower sections. The flow-blocking cylinder 104 is equipped with an expansion bladder 107. An air tube 108 is inserted inside the liquid guide tube 103. The air tube 108 is located inside the lower section of the liquid guide tube 103 of the flow-blocking cylinder 104. The inlet end of the air tube 108 is connected to the buffer bladder 102, and the outlet end of the air tube 108 is connected to the expansion bladder 107. A flow-blocking plug 106 is fixedly connected to the upper end of the expansion bladder 107. Specifically, the auxiliary box 5 and the support frame 1 are connected by a torsion spring. The outer surface of the fireproof cloth is placed on the outer surface of the drive rod 4. This device needs to be used in conjunction with other devices. When the non-vertical fireproof cloth lifts the auxiliary box 5, the elastic force of the torsion spring is converted into pressure on the buffer bag 102 to ensure its tight contact with the fireproof cloth. When the fireproof cloth is pulled by an external force during the measurement process, the buffer bladder 102 is compressed, and the air tube 108 transmits the pressure to the expansion bladder 107, causing it to expand under force and push the flow-blocking plug 106 upward, thereby blocking the liquid guide tube 103 in the upper section of the flow-blocking cylinder 104. This can prevent excessive liquid from being squeezed out due to the sudden pulling of the fireproof cloth, and avoid the liquid from being unable to be cleared because it exceeds the working range of the jet head 3, thus ensuring that the subsequent process is not affected.

[0020] Example 2: Please refer to Figure 3 , Figures 6-8 A length measuring device for fireproof fabric, based on embodiment 1, wherein an upper pressure cylinder 301 is detachably connected to one end of the throttling cylinder 302 away from the output cylinder 311, an isolation plate 307 is fixedly installed on the inner end of the upper pressure cylinder 301, a bellows 308 is fixedly connected to the bottom end of the isolation plate 307, a movable sleeve 306 is sleeved inside the throttling cylinder 302, a movable plug 312 is provided below the movable sleeve 306, and the upper end of the movable plug 312 is connected to the bellows 308, and the outer surface of the movable plug 312 is tightly fitted to the inside of the throttling cylinder 302; The movable plug 312 is connected to the output cylinder 311 by a return spring 313. The return spring 313 provides an upward force for the movable plug 312. A support ring is fixedly installed at the inner end of the throttle cylinder 302. Multiple extrusion rods 309 are rotatably installed on the outer surface of the support ring. The extrusion rods 309 are arranged in a ring shape. A conical sleeve 310 is provided above the movable plug 312, and the ends of the extrusion rods 309 are in contact with the outer surface of the conical sleeve 310. Specifically, a limiting groove is provided on the outer surface of the conical sleeve 310, and the end of the extrusion rod 309 slides inside the limiting groove, thereby preventing the extrusion rod 309 from being misaligned during the sliding process. When the movable sleeve 306 moves down, its bottom end contacts multiple extrusion rods 309, causing the ends of the extrusion rods 309 to converge towards the center, thereby pressing the conical sleeve 310 downward and finally pushing the movable plug 312 downward.

[0021] like Figures 7-8As shown, a sealing sleeve 315 is fixedly installed on the inner end of the output cylinder 311, and a flow limiting tube 314 is fixedly connected to the bottom end of the movable plug 312. The flow limiting tube 314 is connected to the bellows 308, and the sealing sleeve 315 is sleeved on the outer surface of the flow limiting tube 314. A discharge port 316 is opened on the outer surface of the sealing sleeve 315, and multiple liquid outlet holes are opened on the outer surface of the flow limiting tube 314. In the default state, the liquid outlet holes on the outer surface of the flow limiting tube 314 are wrapped by the sealing sleeve 315. Only when the flow limiting tube 314 moves downward will the liquid outlet holes gradually correspond to the discharge port 316. like Figure 3 , Figure 8 As shown, specifically, the sealing sleeve 315 has an isolation block installed inside, which divides it into upper and lower layers. The discharge port 316 is located above the isolation block. The bottom end of the sealing sleeve 315 has multiple flow guide notches, so that the liquid in the output cylinder 311 can flow smoothly into the liquid guide pipe 103.

[0022] Example 3: Please refer to Figure 1 , Figure 3 , Figure 9 , Figure 10 A length measuring device for fireproof fabric, based on embodiments 1 and 2, has a transmission shaft 201 inside the auxiliary box 5. The transmission shaft 201 is connected to and driven by the drive rod 4 through a gear set (not shown in the figure). The working principle and related structure of the gear set are existing mature technologies and will not be described in detail here. A booster impeller 206 is rotatably installed at the inner end of the booster cylinder 202, and the transmission shaft 201 and the drive shaft of the booster impeller 206 are tensioned and sleeved by a drive belt 203. A tensioner (not shown in the figure) is provided inside the auxiliary box 5 to maintain a constant and reasonable tension force for the drive belt 203 to ensure stable operation and extend its service life. The inner cavity of the flow divider 205 is fitted with an upper plug 209, and a return pipe 204 is fixedly connected to the outer surface of the flow divider 205. The output end of the return pipe 204 is connected to the booster cylinder 202, and the input end of the return pipe 204 is located below the upper plug 209. When the booster impeller 206 rotates, the pressure generated will be transmitted through the flow divider 205 to the upper plug 209, pushing the upper plug 209 downward. Finally, the input end of the return pipe 204 is exposed above the upper plug 209, allowing the pressure to be transmitted back to the interior of the booster cylinder 202 through the return pipe 204, forming a closed loop.

[0023] like Figure 3 , Figures 9-11As shown, a middle plug 208 and a flow-blocking block 207 are respectively provided below the upper plug 209, and the upper plug 209, the middle plug 208 and the flow-blocking block 207 are all connected by a support rod. A transmission pipe 303 is fixedly connected to the outer surface of the flow divider 205. The output end of the transmission pipe 303 is connected to the upper pressure cylinder 301, and its output port is located above the isolation plate 307. An inlet pipe 304 is also fixedly connected to the outer surface of the flow divider 205, and the inlet pipe 304 corresponds to the transmission pipe 303. The middle plug 208 is located between the inlet pipe 304 and the transmission pipe 303. A support sleeve 401 is fixedly installed at the inner end of the auxiliary box 5. A central rod 404 passes through the inside of the support sleeve 401. The central rod 404 is connected to the flow blocking block 207 by an auxiliary spring 210. Specifically, a limit block is fixedly installed at the inner end of the diverter 205. Under the elastic force of the auxiliary spring 210, the flow blocking block 207 is pushed upward, allowing the liquid sprayed from the inlet pipe 304 to pass through the gap between the middle layer plug 208 and the flow blocking block 207. It is worth noting that the length design of the auxiliary spring 210 ensures that it always applies an upward thrust to the flow blocking block 207 during the entire downward stroke of the central rod 404. If the booster impeller 206 completely loses pressure on the upper layer plug 209, the auxiliary spring 210 will continue to push the flow blocking block 207 upward until the flow blocking block 207 completely blocks the inlet pipe 304.

[0024] like Figure 3 , Figure 6 , Figure 7 , Figures 10-12 A transmission frame 305 is fixedly sleeved on the outer surface of the center rod 404. The end of the transmission frame 305 away from the center rod 404 is fixedly connected to the movable sleeve 306. The center rod 404 and the support sleeve 401 are connected by a guide spring 405. An auxiliary sleeve 407 is fixedly installed at the bottom of the support sleeve 401. A ratchet 406 passes through the inside of the support sleeve 401 and is fixedly connected to the center rod 404. Multiple locking blocks 408 are passed through the outer surface of the auxiliary sleeve 407 and are arranged in a ring. A locking sleeve 409 is fitted on the outer surface of the auxiliary sleeve 407. The inner edge of the locking sleeve 409 is chamfered so that when the locking sleeve 409 moves upward, it will contact the chamfer and press the locking block 408. At this time, the locking block 408 moves towards the ratchet 406 and locks the ratchet 406, preventing the ratchet 406 from moving further. The outer surface of the locking sleeve 409 is fitted with a mating ring 402, and the outer surface of the mating ring 402 is fixedly connected with an abutment wire 403. The free end of the abutment wire 403 is fitted on the outer surface of the transmission shaft 201. Specifically, the abutment wire 403 has a certain elasticity. When the auxiliary box 5 is in a vertical state, the abutment wire 403 forms an angle with the auxiliary box 5, and the length of the abutment wire 403 is greater than the height of the auxiliary box 5. In the default state, the abutment wire 403 always pulls the locking sleeve 409 upward, and the ratchet 406 cannot move at this time. If the auxiliary box 5 rotates, the abutment wire 403 will no longer be subjected to the pulling force. At this time, the locking sleeve 409 will move downward under the elastic force of the abutment wire 403. The bottom end of the ratchet 406 contacts the inside of the auxiliary sleeve 407. When the auxiliary sleeve 407 moves upward, it will first push the ratchet 406 to reset, and then lock the locking block 408. It is worth noting that the locking block 408 and the auxiliary sleeve 407 are connected by a spring plate, so that the locking block 408 always maintains a force moving towards the ratchet 406. When the ratchet 406 moves down, it will squeeze the locking block 408, causing it to slide from the current trough to the crest. Then, under the action of the spring plate, the locking block 408 quickly resets and falls into the next trough of the ratchet 406, thereby achieving the effect of temporarily locking the ratchet 406. The elastic force of the spring plate is greater than the elastic force of the guide spring 405 and the return spring 313. The pressure generated by the booster impeller 206 through the gear set transmission is greater than the preload force of the spring plate.

[0025] The working principle of this invention is: The fireproof cloth to be measured is covered on the outer surface of the drive rod 4. At this time, the sponge on the outer surface of the buffer bag 102 will contact the outer surface of the fireproof cloth and cause the auxiliary box 5 to rotate. The contact wire 403 will no longer be pulled. At this time, the locking sleeve 409 will move downward under the elastic force of the contact wire 403. As the fireproof cloth moves (before this, the sponge is already wet), the sponge will apply liquid to the outer surface of the fireproof cloth. As the drive rod 4 rotates, the transmission shaft 201 will rotate through the gear set. Then the transmission shaft 201 will drive the booster impeller 206 to rotate through the drive belt 203. The pressure generated when the booster impeller 206 rotates will push the upper plug 209 downward, so that the liquid sprayed from the liquid inlet pipe 304 can pass through the gap between the middle plug 208 and the upper plug 209 and flow into the interior of the upper pressure cylinder 301. At the same time, the upper plug 209 moves downward and pushes the central rod 404 to move. The central rod 404 drives the movable sleeve 306 to move downward through the transmission frame 305. Then the movable sleeve 306 pushes the conical sleeve 310 and the movable plug 312 downward through the extrusion rod 309, so that the liquid outlet hole on the outer surface of the flow limiting tube 314 gradually aligns with the discharge port 316. Then the liquid will flow into the interior of the output cylinder 311. The liquid guide tube 103 transfers the liquid to the sponge on the outer surface of the buffer bladder 102, keeping it in a moist state, and finally allowing the detector head 2 to better detect changes in reflectivity. As the center rod 404 moves downward, the ratchet 406 is locked by the locking block 408. Since the outer surface of the fireproof cloth is smooth, the drive rod 4 will inevitably slip when it comes into contact with the fireproof cloth. If the drive rod 4 slips, it will not be able to provide enough kinetic energy to the booster impeller 206. Therefore, the flow blocking block 207 will move upward under the elastic force of the auxiliary spring 210, allowing the liquid sprayed from the inlet pipe 304 to pass through the gap between the middle layer plug 208 and the flow blocking block 207. When the probe 2 cannot detect the water layer on the outer surface of the fireproof cloth, the control module inside the probe 2 immediately receives and identifies the signal and issues an alarm signal, thereby preventing slippage between the fireproof cloth and the drive rod 4 in time. By avoiding slippage, local high temperature caused by frictional heat can be effectively prevented, avoiding damage to the surface of the fireproof cloth and overheating and wear of the drive rod 4, ensuring the stability of the measurement process and the service life of the equipment. When the measurement ends, the auxiliary box 5 returns to its initial state. At this time, the contact wire 403 will pull the locking sleeve 409 upward through the mating ring 402 and push the ratchet 406 upward. The center rod 404 also moves with it. The center rod 404 drives the transmission frame 305 to move, allowing the movable sleeve 306 to reset. At this time, the movable plug 312 returns to its initial position under the elastic force of the return spring 313. During the resetting process of the center rod 404, the auxiliary spring 210 drives the flow blocking block 207 to move upward, blocking the output port of the liquid inlet pipe 304, thus completing the measurement operation of the fireproof cloth.

[0026] The above description is only a preferred embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any equivalent substitutions or modifications made by those skilled in the art within the scope of the technology disclosed in the present invention, based on the technical solution and inventive concept of the present invention, should be covered within the scope of protection of the present invention.

Claims

1. A length measuring device for fireproof fabric, comprising a support frame (1), characterized in that: A drive rod (4) is rotatably mounted on the outer surface of the support frame (1), and a probe (2) is fixedly mounted on the outer surface of the support frame (1) to detect the movement speed and length of the fireproof cloth in real time. An auxiliary box (5) is rotatably mounted on the outer surface of the support frame (1). A coating device is provided at the bottom of the auxiliary box (5) to form a water layer on the outer surface of the fireproof cloth. The water layer changes the reflectivity of the fireproof cloth. The probe (2) captures the change in the intensity of reflected light on the surface of the fireproof cloth to realize real-time monitoring of the movement state of the cloth, thereby improving the accuracy and stability of length measurement. A throttling cylinder (302) is fixedly mounted inside the auxiliary box (5). An output cylinder (311) is fixedly connected to the bottom end of the throttling cylinder (302). A booster cylinder (202) is also fixedly connected inside the auxiliary box (5). A diverter cylinder (205) is fixedly connected to the output end of the booster cylinder (202).

2. The length measuring device for fireproof fabric according to claim 1, characterized in that: The application device includes a buffer box (101), inside which a buffer bladder (102) is installed, and the outer surface of the buffer bladder (102) is covered with a sponge. The input end of the buffer box (101) is connected to the output end of the throttle cylinder (302) through a liquid guide tube (103).

3. The length measuring device for fireproof fabric according to claim 2, characterized in that: The liquid guide tube (103) is fitted with a flow-blocking cylinder (104) on the outside. Its internal space divides the liquid guide tube (103) into upper and lower sections. The flow-blocking cylinder (104) is provided with an expansion bladder (107). An air tube (108) is passed through the liquid guide tube (103). The input end of the air tube (108) is connected to the buffer bladder (102), and the output end of the air tube (108) is connected to the expansion bladder (107). A flow-blocking plug (106) is fixedly connected to the upper end of the expansion bladder (107).

4. The length measuring device for fireproof fabric according to claim 1, characterized in that: The throttling cylinder (302) is detachably connected to an upper pressure cylinder (301) at one end away from the output cylinder (311). An isolation plate (307) is fixedly installed at the inner end of the upper pressure cylinder (301). A bellows pipe (308) is fixedly connected to the bottom end of the isolation plate (307). A movable sleeve (306) is fitted inside the throttling cylinder (302). A movable plug (312) is provided below the movable sleeve (306). The upper end of the movable plug (312) is connected to the bellows pipe (308). The outer surface of the movable plug (312) is tightly fitted to the inside of the throttling cylinder (302).

5. The length measuring device for fireproof fabric according to claim 4, characterized in that: The movable plug (312) is connected to the output cylinder (311) by a return spring (313). The return spring (313) provides an upward force for the movable plug (312). A support ring is fixedly installed at the inner end of the throttle cylinder (302). Multiple extrusion rods (309) are rotatably installed on the outer surface of the support ring. The extrusion rods (309) are arranged in a ring shape. A conical sleeve (310) is provided above the movable plug (312), and the end of the extrusion rod (309) contacts the outer surface of the conical sleeve (310).

6. The length measuring device for fireproof fabric according to claim 5, characterized in that: A sealing sleeve (315) is fixedly installed at the inner end of the output cylinder (311), and a flow limiting tube (314) is fixedly connected to the bottom end of the movable plug (312). The flow limiting tube (314) is connected to the bellows (308), and the sealing sleeve (315) is sleeved on the outer surface of the flow limiting tube (314). A discharge port (316) is opened on the outer surface of the sealing sleeve (315), and multiple liquid outlet holes are opened on the outer surface of the flow limiting tube (314).

7. The length measuring device for fireproof fabric according to claim 1, characterized in that: The auxiliary box (5) is equipped with a transmission shaft (201), and the inner end of the booster cylinder (202) is rotatably mounted with a booster impeller (206). The transmission shaft (201) and the drive shaft of the booster impeller (206) are tensioned and sleeved by a drive belt (203).

8. The length measuring device for fireproof fabric according to claim 7, characterized in that: The inner cavity of the flow divider (205) is fitted with an upper plug (209). The outer surface of the flow divider (205) is fixedly connected with a return pipe (204). The output end of the return pipe (204) is connected to the booster cylinder (202). The input end of the return pipe (204) is located below the upper plug (209). The lower part of the upper plug (209) is provided with a middle plug (208) and a flow blocking block (207). The upper plug (209), the middle plug (208) and the flow blocking block (207) are all connected by a support rod. The outer surface of the flow divider (205) is fixedly connected with a transmission pipe (303).

9. The length measuring device for fireproof fabric according to claim 8, characterized in that: The outer surface of the diverter (205) is also fixedly connected to an inlet pipe (304), and the inlet pipe (304) corresponds to the transmission pipe (303). The middle layer plug (208) is located between the inlet pipe (304) and the transmission pipe (303). The inner end of the auxiliary box (5) is fixedly installed with a support sleeve (401). A center rod (404) is inserted inside the support sleeve (401). The center rod (404) is connected to the flow blocking block (207) by an auxiliary spring (210). The center rod (404) is connected to the support sleeve (401) by a guide spring (405).

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