Automatic temperature-sensing fire damper for machine tool

Abstract

The utility model discloses a machine tool temperature-sensing automatic fireproof valve which comprises a valve body, a connecting plate is fixedly connected to the valve body, a temperature-sensing opening and closing mechanism is arranged in the valve body, a sealing mechanism is arranged on one side of the temperature-sensing opening and closing mechanism and comprises a fixing frame, an electric push rod is fixedly connected to the end of the fixing frame, and the electric push rod is fixedly connected to the end of the fixing frame. The end of an output shaft of the electric push rod is fixedly connected with a sealing frame, the interior of the sealing frame is fixedly connected with a middle frame, and the surface of one side of the sealing frame is fixedly connected with a first sealing gasket. According to the machine tool temperature-sensing automatic fireproof valve, the electric push rod drives the sealing frame and the middle frame to move, the sealing frame and the middle frame are attached to the valve plate, meanwhile, the heat conduction block transmits heat to the thermal bimetallic strip, the thermal bimetallic strip is heated to deform, and gas in the air cylinder is introduced into the elastic air bag; the elastic air bag is inflated to expand to block the gap, smoke leakage is effectively prevented, and the sealing effect is improved.

Description

Technical Field

[0001] The utility model relates to the technical field of fire dampers, in particular to a temperature-sensing automatic fire damper for a machine tool. Background Art

[0002] The fire damper is a temperature-controlled valve made of memory molten alloy, which is closed by gravity and a spring mechanism. Installing a fire damper in the smoke exhaust duct of a machine tool can play a good safety role. In the prior art, smoke easily overflows from the gap of the valve plate after the fire damper is closed, and the sealing effect is not ideal.

[0003] For example, patent publication number CN213655846U specifically discloses a fire damper with an alarm, which includes a fire damper body, an actuator and a temperature sensing element arranged on the fire damper body, a rotating shaft rotatably connected to the fire damper body, a transmission plate connected to the rotating shaft, and includes a switch device for receiving a transmission plate closing signal and outputting a control signal; a control device for receiving a control signal and outputting an alarm signal; a buzzer connected to the control device for receiving and responding to the alarm signal to output a sound feedback signal. This application has the effect of being able to sound an alarm when the transmission window is closed to remind the staff, but there is a problem that smoke easily overflows from the gap of the valve plate after the fire damper is closed, and the sealing effect is not ideal. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model provides a temperature-sensing automatic fire damper for machine tools, which solves the problem that smoke easily overflows from the gap of the valve plate after the fire damper is closed and the sealing effect is not ideal.

[0005] To achieve the above purpose, the utility model is implemented through the following technical solutions: a machine tool temperature-sensitive automatic fire damper comprises a valve body, a connecting plate is fixedly connected to the valve body, a temperature-sensitive opening and closing mechanism is arranged inside the valve body, and a sealing mechanism is arranged on one side of the temperature-sensitive opening and closing mechanism;

[0006] The sealing mechanism includes a fixing frame, an electric push rod is fixedly connected to the end of the fixing frame, an output shaft end of the electric push rod is fixedly connected to a sealing frame, an intermediate frame is fixedly connected inside the sealing frame, a first sealing gasket is fixedly connected to a surface of one side of the sealing frame, a second sealing gasket is fixedly connected to a surface of one side of the intermediate frame, a plurality of heat conducting blocks are arranged on the intermediate frame and the sealing frame, a heat conducting rod is fixedly connected to the end of the heat conducting block, a thermal bimetallic strip is arranged at the end of the heat conducting rod, a fixing bolt is connected to one end of the thermal bimetallic strip, an air cylinder is arranged at one side of the thermal bimetallic strip, a piston is slidably connected to the inside of the air cylinder, a connecting rod is fixedly connected to the end of the piston, a pressure plate is fixedly connected to the end of the connecting rod, a first spring is arranged at the bottom of the pressure plate, the first spring is located on the periphery of the connecting rod, a connecting pipe is connected to one end of the air cylinder, and an elastic air bag is connected to the end of the connecting pipe.

[0007] Preferably, the fixing bracket is installed inside the valve body, and the fixing bracket is detachably connected to the inner wall of the valve body by a plurality of bolts, so that the fixing bracket can be easily installed and fixed, thereby facilitating maintenance and replacement.

[0008] Preferably, one end of the thermal bimetallic strip is connected to the inner wall of the sealing frame or the intermediate frame by a fixing bolt, and the other end of the thermal bimetallic strip is set as a free end, so that after the thermal bimetallic strip is heated, the free end is deformed toward the pressure plate.

[0009] Preferably, one end of the connecting rod passes through the gas cylinder and partially extends to the outside of the gas cylinder and is connected to the pressure plate, and the pressure plate is in contact with the thermal bimetallic strip, so that the thermal bimetallic strip can push the pressure plate to move.

[0010] Preferably, one end of the first spring is connected to the end of the gas cylinder, and the other end of the first spring is fixedly connected to the pressure plate, so that the first spring can reset the pressure plate.

[0011] Preferably, the temperature-sensing opening and closing mechanism includes two valve plates, both of which are rotatably connected to the inner wall of the valve body, both ends of the valve plates are rotatably connected to driven gears, the two driven gears are meshingly connected with a driving gear, and the end of the driving gear is connected to an opening and closing motor, and the temperature-sensing opening and closing mechanism also includes a spring seat, the bottom end of the spring seat is fixedly connected to a second spring, the bottom end of the second spring is fixedly connected to a movable magnet, the bottom of the movable magnet is provided with a temperature-sensitive magnetic steel, the end of the movable magnet is fixedly connected to a movable contact, one side of the movable contact is provided with a fixed contact, the movable contact and the fixed contact ends are connected to a controller, the controller is connected to the opening and closing motor and the electric push rod, can be used for multiple cycles, there is no need to replace the fuse, and the convenience of use is improved.

[0012] The utility model provides a temperature-sensitive automatic fire damper for machine tools. Compared with the prior art, it has the following beneficial effects:

[0013] 1. The temperature-sensing automatic fire damper of the machine tool drives the sealing frame and the intermediate frame to move through the electric push rod, and fits the sealing frame and the intermediate frame with the valve plate. At the same time, the heat-conducting block transfers heat to the hot bimetallic strip. The hot bimetallic strip is deformed by heat and passes the gas inside the air cylinder into the elastic airbag, so that the elastic airbag is inflated to block the gap, effectively preventing smoke leakage and improving the sealing effect.

[0014] 2. The temperature-sensing automatic fire damper of the machine tool loses its magnetism when the temperature-sensing magnetic steel heats up, causing the movable magnet to lose its repulsive force and reset under the action of the second spring, so that the movable contact contacts the fixed contact to generate a signal to enable the controller to work. The controller controls the opening and closing motor to switch the valve plate. It can be used in multiple cycles without replacing the fuse, which improves the convenience of use. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 It is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic diagram of the sealing mechanism structure of the utility model;

[0017] Figure 3 It is a schematic diagram of the connection structure between the heat conducting block and the gas cylinder of the utility model;

[0018] Figure 4 It is a schematic diagram of the structure of the temperature-sensing opening and closing mechanism of the utility model.

[0019] In the figure: 1. valve body; 2. sealing mechanism; 201. fixing frame; 202. electric push rod; 203. sealing frame; 204. intermediate frame; 205. first sealing gasket; 206. second sealing gasket; 207. heat-conducting block; 208. heat-conducting rod; 209. thermal bimetallic strip; 210. fixing bolt; 211. air cylinder; 212. piston; 213. connecting rod; 214. pressure plate; 215. first spring; 216. elastic airbag; 3. connecting plate; 4. temperature-sensing opening and closing mechanism; 401. valve plate; 402. driven gear; 403. driving gear; 404. opening and closing motor; 405. movable magnet; 406. second spring; 407. movable contact; 408. temperature-sensing magnetic steel. DETAILED DESCRIPTION

[0020] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0021] See also Figure 1-3 The utility model provides a technical solution: a machine tool temperature-sensing automatic fire damper, including a valve body 1, a connecting plate 3 is fixedly connected to the valve body 1, a temperature-sensing opening and closing mechanism 4 is arranged inside the valve body 1, and a sealing mechanism 2 is arranged on one side of the temperature-sensing opening and closing mechanism 4. The sealing mechanism 2 can play a good sealing role on the gap between the valve plates 401 and between the valve plates 401 and the inner wall of the valve body 1, effectively preventing smoke leakage and improving the sealing effect.

[0022] The sealing mechanism 2 includes a fixing frame 201, which is fixedly installed inside the valve body 1, and the fixing frame 201 is detachably connected to the inner wall of the valve body 1 by a plurality of bolts, so that the fixing frame 201 can be conveniently installed and fixed, so that it can be conveniently repaired and replaced. The end of the fixing frame 201 is fixedly connected to an electric push rod 202, and the end of the output shaft of the electric push rod 202 is fixedly connected to a sealing frame 203, so that the electric push rod 202 can drive the sealing frame 203 and the intermediate frame 204 to move, so that it can be conveniently separated from and fitted with the valve plate 401. The sealing frame 203 is fixedly connected inside The intermediate frame 204 is connected, and a first sealing gasket 205 is fixedly connected to the surface of one side of the sealing frame 203, which can seal the gap between the valve plate 401 and the valve body 1. A second sealing gasket 206 is fixedly connected to the surface of one side of the intermediate frame 204, which can seal the gap between the valve plates 401. A plurality of heat-conducting blocks 207 are arranged on the intermediate frame 204 and the sealing frame 203, which can transfer the heat on the valve plate 401. A heat-conducting rod 208 is fixedly connected to the end of the heat-conducting block 207, and a thermal bimetallic sheet 209 is arranged at one end of the thermal bimetallic sheet 209 by a fixing bolt 210. The thermobimetallic strip 209 is fixedly connected to the inner wall of the sealing frame 203 or the intermediate frame 204. The other end of the thermobimetallic strip 209 is set as a free end, so that after the thermobimetallic strip 209 is heated, the free end is deformed toward the pressure plate 214. One end of the thermobimetallic strip 209 is fixedly connected with a fixing bolt 210. One side of the thermobimetallic strip 209 is provided with a gas cylinder 211. A piston 212 is slidably connected inside the gas cylinder 211. A connecting rod 213 is fixedly connected to the end of the piston 212. A pressing plate 214 is fixedly connected to the end of the connecting rod 213. One end of the connecting rod 213 passes through the gas cylinder 211 and partially extends to the outside of the gas cylinder 211. Plate 214 is in contact with the thermal bimetallic strip 209, so that the thermal bimetallic strip 209 can push the pressure plate 214 to move. A first spring 215 is provided at the bottom of the pressure plate 214. A connecting pipe is connected to one end of the air cylinder 211. One end of the first spring 215 is fixedly connected to the end of the air cylinder 211, and the other end of the first spring 215 is fixedly connected to the pressure plate 214, so that the first spring 215 can reset the pressure plate 214. An elastic airbag 216 is connected to the end of the connecting pipe. The elastic airbag 216 is respectively arranged on one side of the first sealing pad 205 and the second sealing pad 206, which can effectively improve the sealing effect.

[0023] See also Figure 1 and Figure 4 The temperature-sensing opening and closing mechanism 4 includes two valve plates 401, and the two valve plates 401 are rotatably connected to the inner wall of the valve body 1. The ends of the two valve plates 401 are rotatably connected to driven gears 402, and the two driven gears 402 are meshed with a driving gear 403. The end of the driving gear 403 is fixedly connected to an opening and closing motor 404. The temperature-sensing opening and closing mechanism 4 also includes a spring seat, and the bottom end of the spring seat is fixedly connected to a second spring 406, and the bottom end of the second spring 406 is fixedly connected to a movable magnet 405. The bottom of the movable magnet 405 is provided with a temperature-sensitive magnetic steel 408, and the end of the movable magnet 405 is fixedly connected to a movable contact 407, and a fixed contact is provided on one side of the movable contact 407. The movable contact 40 7 and the fixed contact end are connected with a controller, which is a M68HC16 single-chip microcomputer and can control the whole. The controller is connected to the opening and closing motor 404 and the electric push rod 202, so that the controller can control the opening and closing motor 404 and the electric push rod 202 to work. The temperature-sensitive magnetic steel 408 loses its magnetism when it heats up, so that the movable magnet 405 loses its repulsive force and resets under the action of the second spring 406, so that the movable contact 407 contacts with the fixed contact to generate a signal to make the controller work. The controller controls the opening and closing motor 404 to switch the valve plate 401. It can be used for multiple cycles without replacing the fuse, thereby improving the convenience of use.

[0024] During operation, after the valve plate 401 is closed, the electric push rod 202 drives the sealing frame 203 and the intermediate frame 204 to move, and the sealing frame 203 and the intermediate frame 204 are fitted with the valve plate 401, and the first sealing gasket 205 is used to seal the gap between the valve plate 401 and the valve body 1, and the second sealing gasket 206 seals the gap between the valve plates 401, and at the same time, the heat conducting block 207 contacts the valve plate 401, and the heat on the valve plate 401 is transferred to the heat conducting rod 208, and the heat conducting rod 208 transfers the heat to the hot bimetallic strip 209, and the hot bimetallic strip 209 is deformed by the heat and pushes the pressing plate 214 to move, and the movement of the pressing plate 214 drives the connecting rod 213 to move, and the movement of the connecting rod 213 drives the piston 212 to move, and the gas inside the air cylinder 211 is passed into the elastic airbag 216, so that the elastic airbag 216 is inflated to block the gap, effectively preventing smoke leakage and improving the sealing effect.

[0025] Meanwhile, the contents not described in detail in this specification belong to the prior art known to those skilled in the art.

Claims

1. A temperature-sensing automatic fire damper for machine tools, comprising a valve body (1), characterized in that: A connecting plate (3) is fixedly connected to the valve body (1), a temperature-sensing opening and closing mechanism (4) is provided inside the valve body (1), and a sealing mechanism (2) is provided on one side of the temperature-sensing opening and closing mechanism (4); The sealing mechanism (2) comprises a fixed frame (201), the end of the fixed frame (201) is fixedly connected to an electric push rod (202), the end of the output shaft of the electric push rod (202) is fixedly connected to a sealing frame (203), the sealing frame (203) is fixedly connected to an intermediate frame (204) inside, a first sealing gasket (205) is fixedly connected to a surface of one side of the sealing frame (203), a second sealing gasket (206) is fixedly connected to a surface of one side of the intermediate frame (204), a plurality of heat conducting blocks (207) are provided on the intermediate frame (204) and the sealing frame (203), the ends of the heat conducting blocks (207) are fixedly connected to heat conducting rods (208), and the heat conducting A thermal bimetallic strip (209) is provided at the end of the rod (208), one end of the thermal bimetallic strip (209) is connected to a fixing bolt (210), one side of the thermal bimetallic strip (209) is provided with an air cylinder (211), a piston (212) is slidably connected inside the air cylinder (211), a connecting rod (213) is fixedly connected to the end of the piston (212), a pressure plate (214) is fixedly connected to the end of the connecting rod (213), a first spring (215) is provided at the bottom of the pressure plate (214), the first spring (215) is located on the periphery of the connecting rod (213), one end of the air cylinder (211) is connected to a connecting pipe, and the end of the connecting pipe is connected to an elastic air bag (216).

2. The temperature-sensing automatic fire damper for machine tools according to claim 1 is characterized in that: The fixing frame (201) is installed inside the valve body (1), and the fixing frame (201) is detachably connected to the inner wall of the valve body (1) via a plurality of bolts.

3. The temperature-sensing automatic fire damper for machine tools according to claim 1 is characterized in that: One end of the thermal bimetallic strip (209) is connected to the inner wall of the sealing frame (203) or the intermediate frame (204) via a fixing bolt (210), and the other end of the thermal bimetallic strip (209) is arranged as a free end.

4. The temperature-sensing automatic fire damper for machine tools according to claim 1 is characterized in that: One end of the connecting rod (213) passes through the gas cylinder (211) and partially extends to the outside of the gas cylinder (211) and is connected to the pressure plate (214), and the pressure plate (214) is in contact with the thermal bimetallic strip (209).

5. The temperature-sensing automatic fire damper for machine tools according to claim 1 is characterized in that: One end of the first spring (215) is connected to the end of the air cylinder (211), and the other end of the first spring (215) is fixedly connected to the pressure plate (214).

6. The temperature-sensing automatic fire damper for machine tools according to claim 1 is characterized in that: The temperature-sensing opening and closing mechanism (4) comprises two valve plates (401), the two valve plates (401) are rotatably connected to the inner wall of the valve body (1), the ends of the two valve plates (401) are rotatably connected to driven gears (402), a driving gear (403) is meshedly connected between the two driven gears (402), and the end of the driving gear (403) is connected to an opening and closing motor (404).

7. The temperature-sensing automatic fire damper for machine tools according to claim 6 is characterized in that: The temperature-sensitive opening and closing mechanism (4) also includes a spring seat, the bottom end of which is fixedly connected to a second spring (406), the bottom end of which is fixedly connected to a movable magnet (405), and the bottom of the movable magnet (405) is provided with a temperature-sensitive magnetic steel (408).

8. The temperature-sensing automatic fire damper for machine tools according to claim 7 is characterized in that: The end of the movable magnet (405) is fixedly connected to a movable contact (407), one side of the movable contact (407) is provided with a fixed contact, the movable contact (407) and the ends of the fixed contact are connected to a controller, and the controller is connected to the opening and closing motor (404) and the electric push rod (202).

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