Steel fiber forming wire drawing machine

Abstract

The present application relates to a steel fiber forming wire drawing machine applied to the field of metal wire drawing, comprising a water tank type wire drawing machine body, the water tank type wire drawing machine body comprises a water tank, and two symmetrical stepped capstans and a wire drawing die frame are installed in the water tank, a heat dissipation tank is additionally arranged on the outer wall of the water tank to filter and heat dissipate the cooling liquid, the space of the water tank type wire drawing machine body is reasonably utilized, the rotation of the stepped capstan drives the contraction vibration type filter cylinder to rotate, the cooling liquid is filtered by centrifugal force, the filtering effect is effectively improved, the contraction vibration type filter cylinder rotates, and the front and rear actions of magnetic repulsion force and centrifugal force are utilized to realize contraction vibration, so that the purpose of self-cleaning is achieved, the situation that the contraction vibration type filter cylinder is blocked due to the accumulation of a large amount of metal scraps is effectively prevented, the contraction vibration type filter cylinder is conveniently disassembled and replaced and maintained, and the structure is simple and easy to maintain.

Description

Technical Field

[0001] The present invention relates to a steel fiber forming drawing machine, and particularly to a steel fiber forming drawing machine applied in the field of metal drawing. Background Technology

[0002] A water tank type wire drawing machine is a piece of equipment used for processing metal wires. Its main feature is that it achieves the wire drawing process by circulating coolant in a water tank. During the wire drawing process, metal debris can fall into the coolant, easily scratching the surface of the steel wire and thus affecting the quality of steel fiber forming.

[0003] To address the issue of metal shavings falling into the coolant, a certain wire drawing machine on the market employs a coolant filtration design, giving it a certain market share.

[0004] Chinese patent CN202222720166.3 discloses a cooling structure for a water tank wire drawing machine. The machine includes a cooling water tank, a support plate, and a base plate. Four sets of support rods are mounted on the top of the base plate, and the cooling water tank is mounted on the support plate. A filter tank is located on the top of the base plate. This design uses magnetic strips to attract metal debris from the cooling water; filters the cooling water through a filter screen; and uses a cleaning component to clean impurities from the filter screen, preventing clogging and improving filtration efficiency. Simultaneously, a water pump draws cooling water from the clean water tank into the cooling water tank, thus achieving automated filtration and circulation of the cooling water. This improves the cleanliness of the cooling water and effectively reduces cooling water loss.

[0005] Chinese patent CN202221496662.9 discloses a self-cleaning wire drawing machine. The machine includes a body and a filter screen located above the body. An annular water tank is mounted on the outside of the body, and a water pump is mounted on the outside of the water tank. The input end of the water pump is connected to a first water pipe connected to the water tank, and the output end of the water pump is connected to a second water pipe. A nozzle is mounted on the end of the second water pipe furthest from the water pump. An annular plate is mounted on the outside of the body, and an annular groove is formed at the top of the annular plate. The annular groove is connected to a drain pipe connected to the water tank. This self-cleaning wire drawing machine, by activating the water pump, sprays water from the water tank through the nozzle. The filter screen intercepts metal powder, and the water is then discharged back into the water tank through the drain pipe. This achieves the effect of quickly cleaning the metal powder using water circulation, thus not affecting subsequent processing operations of the device.

[0006] Although existing wire drawing machines have technologies for filtering metal debris, the filtering devices used occupy part of the wire drawing machine's space, increasing the machine's size and maintenance costs. Moreover, it is inconvenient to clean and maintain the filter screen. Summary of the Invention

[0007] In view of the above-mentioned prior art, the technical problem to be solved by the present invention is the cleaning of the filter screen.

[0008] To address the aforementioned problems, this invention provides a steel fiber forming wire drawing machine, comprising a water tank type wire drawing machine body. The water tank type wire drawing machine body includes a water tank, and two symmetrically distributed stepped rollers and a wire drawing die frame are installed inside the water tank. A heat dissipation box is fixedly connected to the outer wall of the water tank opposite to the stepped rollers, and a closed door is hinged to the heat dissipation box. A multi-hole water inlet pipe is inserted into the inner wall of the water tank opposite to the stepped rollers, and a rotating seal connected to the side wall of the water tank is fitted onto the multi-hole water inlet pipe. A friction disc is fixedly connected to one end of the multi-hole water inlet pipe. Furthermore, the friction disc abuts against the side wall of the stepped tower wheel, and a shrinking vibration filter cartridge is placed inside the heat dissipation box. A multi-hole water inlet pipe runs through the inside of the shrinking vibration filter cartridge. A turntable is rotatably connected to the inner wall of the closed door, and the shrinking vibration filter cartridge abuts against the turntable. Multiple equally spaced magnetic strips are fixedly connected to the inner wall of the heat dissipation box, and the magnetic strips and the shrinking vibration filter cartridge repel each other magnetically. Water pumps are installed on the inner walls of the heat dissipation box on both sides of the shrinking vibration filter cartridge, and the outlet end of the water pump is connected to the inside of the water tank through a water pipe.

[0009] In the above-mentioned steel fiber forming wire drawing machine, the spare space of the wire drawing machine is used to install a coolant filter device, so as to make reasonable use of the space. The filter screen is self-cleaned by magnetic repulsion vibration, which effectively prevents the filter screen from becoming clogged.

[0010] As a further improvement of this application, the friction disc includes two contact pads, and a sealing membrane is fixedly connected between the sides of the two contact pads. Multiple elastic columns with equal spacing are fixedly connected between the side walls of the two contact pads. The elastic columns are made of a high-elasticity material. The elastic columns rely on elasticity to make the outer contact pads fit tightly against the side walls of the stepped tower wheel. During the rotation of the stepped tower wheel, the contact pads are driven to rotate by friction, thereby making the shrinking vibration filter cartridge rotate. This can effectively save energy consumption, and also make the shrinking vibration filter cartridge effectively improve the filtration effect of the coolant by relying on centrifugal force during the rotation.

[0011] As a further improvement of this application, the shrink-vibration filter cartridge includes an inner disc and an outer disc. Both the inner and outer discs have mounting grooves on their side walls, and a filter cartridge is placed between two mounting grooves. Multiple equally spaced sliders are fixedly connected to the side walls at both ends of the filter cartridge. The inner walls of the mounting grooves have multiple grooves that match the sliders. A water inlet is located on the side wall at the center of the inner disc, and a sealing sleeve is fixedly connected to the side wall of the inner disc at the water inlet. The sealing sleeve is fitted onto a multi-hole water inlet pipe and engages with the multi-hole water inlet pipe. Coolant from inside the water tank enters the shrink-vibration filter cartridge through the multi-hole water inlet pipe, achieving filtration as the coolant passes through the filter cartridge. Under the action of centrifugal force and magnetic repulsion from the magnetic strip, the filter cartridge can shrink and vibrate, thereby shaking off metal debris adhering to the filter cartridge and effectively preventing metal debris from accumulating on the filter cartridge and causing blockage.

[0012] As a further improvement of this application, the filter cartridge includes multiple equally spaced and distributed filter sections, and a movable section is fixedly connected between each two adjacent filter cartridges. The slider is installed on the movable section. The filter section plays the role of filtering coolant. The movable section moves repeatedly under the action of magnetic repulsion and centrifugal force, thereby driving the filter section to contract and vibrate, thereby achieving the purpose of self-cleaning of the filter cartridge.

[0013] As a further improvement to this application, the filter section includes a porous elastic pad, and a flexible filter screen is fixedly connected to the inner side of the porous elastic pad. The porous elastic pad supports the flexible filter screen, and the elasticity of the porous elastic pad allows it to vibrate under the action of the moving section, thereby shaking off metal debris from the flexible filter screen.

[0014] As a further improvement to this application, the moving section includes a rigid moving plate, and a magnetic sheet that repels the magnetic strip is fixedly embedded in the inner wall of the rigid moving plate. The magnetic sheet and the magnetic strip repel each other magnetically, and the rigid moving plate plays a shaping role. Under the magnetic repulsion force, the rigid moving plate moves inward, which in turn drives the filter section to contract inward. At the same time, the centrifugal force causes the rigid moving plate to return to its original position. The two forces act back and forth, causing the rigid moving plate to move repeatedly, which makes the filter section vibrate, thereby achieving the self-cleaning effect of the filter section.

[0015] As another improvement of this application, the inner wall of the sealing connecting sleeve is provided with an annular groove, and the inner wall of the annular groove is fixedly connected with a sealing ring by a spring. The side wall of the multi-hole water inlet pipe is provided with an annular groove that matches the sealing ring. After the sealing connecting sleeve is put on the multi-hole water inlet pipe, the sealing ring and the annular groove are engaged together to achieve a sealed connection between the multi-hole water inlet pipe and the sealing connecting sleeve. In this way, the multi-hole water inlet pipe will drive the shrinking vibration filter cartridge to rotate together under the drive of the stepped tower wheel, which makes it convenient to disassemble and clean the shrinking vibration filter cartridge.

[0016] As another improvement of this application, a latch lock is also connected between the closed door and the heat sink, and a sealing gasket is fixedly connected to the side of the closed door. After the closed door is connected to the heat sink, it can prevent coolant from leaking out. Moreover, after the closed door is closed, the turntable abuts against the outer plate, which can stabilize the outer plate without affecting the rotation of the outer plate.

[0017] In summary, by adding a heat dissipation box to the outer wall of the water tank to filter and dissipate coolant, the space of the water tank-type wire drawing machine is made reasonable use of the space. The rotation of the stepped tower wheel drives the shrinking vibration filter cartridge to rotate, relying on centrifugal force to filter the coolant, effectively improving the filtration effect. During the rotation of the shrinking vibration filter cartridge, the front and back action of magnetic repulsion and centrifugal force achieves shrinking vibration, thereby achieving the purpose of self-cleaning and effectively preventing the accumulation of metal debris that would cause blockage of the shrinking vibration filter cartridge. At the same time, it is also convenient to disassemble the shrinking vibration filter cartridge for replacement and maintenance. The structure is simple and easy to maintain. Attached Figure Description

[0018] Figure 1 This is a perspective view of a water tank type wire drawing machine according to the first embodiment of this application;

[0019] Figure 2 This is a diagram showing the installation location of the heat sink according to the first embodiment of this application;

[0020] Figure 3 This is a top view of the water tank type wire drawing machine according to the first embodiment of this application;

[0021] Figure 4 for Figure 3 Enlarged view of point A in the middle;

[0022] Figure 5 for Figure 4 Enlarged view of point B in the middle;

[0023] Figure 6 This is a perspective view of the porous water inlet pipe and friction disc according to the first embodiment of this application;

[0024] Figure 7 This is a side cross-sectional view of the friction disk according to the first embodiment of this application;

[0025] Figure 8 This is a perspective view of the shrink-vibration filter cartridge according to the first embodiment of this application;

[0026] Figure 9 This is a three-dimensional exploded view of the shrink-vibration filter cartridge according to the first embodiment of this application;

[0027] Figure 10 This is a top view of the shrink-vibration filter cartridge before shrinkage according to the second embodiment of this application;

[0028] Figure 11 This is a top view of the shrink-vibration filter cartridge after shrinking according to the second embodiment of this application;

[0029] Figure 12 This is a top cross-sectional view of the shrink-vibration filter cartridge according to the second embodiment of this application.

[0030] Explanation of the labels in the diagram:

[0031] 1. Water tank type wire drawing machine body, 101 Water tank, 2. Stepped tower wheel, 3. Wire drawing die frame, 4. Heat dissipation box, 5. Enclosed door, 501 Turntable, 6. Multi-hole water inlet pipe, 7. Rotary seal, 8. Friction disc, 801 Contact pad, 802 Sealing membrane, 803 Elastic column, 9. Shrink vibrating filter cartridge, 901 Inner disc, 902 Outer disc, 9021 Mounting groove, 903 Filter cartridge, 9031 Filter section, 9032 Moving section, 904 Slider, 905 Slide groove, 906 Sealing connection sleeve, 9061 Sealing retaining ring, 10. Magnetic strip, 11. Water pump, 12. Multi-hole elastic pad, 13. Flexible filter screen, 14. Rigid moving plate, 15. Magnetic sheet. Detailed Implementation

[0032] The two embodiments of this application will be described in detail below with reference to the accompanying drawings.

[0033] First implementation method:

[0034] Figure 1 , 2 and Figure 3 The machine includes a water tank type wire drawing machine body 1, which includes a water tank 101. Inside the water tank 101, two symmetrically distributed stepped rollers 2 and a wire drawing die frame 3 are installed. A heat dissipation box 4 is fixedly connected to the outer wall of the water tank 101 opposite to the stepped rollers 2. A closed door 5 is hinged to the heat dissipation box 4. A latch lock is also connected between the closed door 5 and the heat dissipation box 4 (the specific connection structure and working principle are well known to those skilled in the art and will not be described in detail here). A sealing gasket is fixedly connected to the side of the closed door 5. After the closed door 5 is connected to the heat dissipation box 4, it can prevent coolant from leaking out. After the closed door 5 is closed, the turntable 501 abuts against the outer plate 902, which can stabilize the outer plate 902 without affecting the rotation of the outer plate 902. A multi-hole water inlet pipe 6 is inserted into the inner wall of the water tank 101 opposite to the stepped rollers 2. A rotating seal 7 connected to the side wall of the water tank 101 is fitted on the multi-hole water inlet pipe 6.

[0035] Figure 4 , 6 and Figure 7As shown, a friction disc 8 is fixedly connected to one end of the porous water inlet pipe 6, and the friction disc 8 abuts against the side wall of the stepped tower wheel 2. The friction disc 8 includes two contact pads 801, and a sealing membrane 802 is fixedly connected between the sides of the two contact pads 801. Multiple elastic columns 803 are fixedly connected between the side walls of the two contact pads 801 and are distributed around them at equal intervals. The elastic columns 803 are made of high elasticity material (preferably polyurethane elastic material, but other materials can be selected according to actual needs). The elastic columns 803 rely on elasticity to make the outer contact pads 801 tightly adhere to the side wall of the stepped tower wheel 2. During the rotation of the stepped tower wheel 2, the contact pads 801 are driven to rotate by friction, thereby making the shrinking vibration filter cartridge 9 rotate. This can effectively save energy consumption, and also make the shrinking vibration filter cartridge 9 effectively improve the filtration effect of the coolant by centrifugal force during the rotation.

[0036] Figure 4 As shown, a shrink-vibration filter cylinder 9 is placed inside the heat dissipation box 4, and a multi-hole water inlet pipe 6 extends into the interior of the shrink-vibration filter cylinder 9. A turntable 501 is rotatably connected to the inner wall of the closed door 5, and the shrink-vibration filter cylinder 9 abuts against the turntable 501. Multiple equally spaced magnetic strips 10 are fixedly connected to the inner wall of the heat dissipation box 4, and the magnetic strips 10 and the shrink-vibration filter cylinder 9 magnetically repel each other. Water pumps 11 (specific models are selected according to actual needs and will not be described in detail here) are installed on the inner walls of the heat dissipation box 4 on both sides of the shrink-vibration filter cylinder 9, and the water outlet of the water pump 11 is connected to the interior of the water tank 101 through a water pipe.

[0037] Second implementation method:

[0038] Figure 8 , 9 10 and Figure 11As shown, the retractable vibration filter cartridge 9 includes an inner disc 901 and an outer disc 902. Both the inner and outer discs 901 and 902 have mounting grooves 9021 on their side walls. A filter cartridge 903 is placed between two mounting grooves 9021. The filter cartridge 903 includes multiple equally spaced, circumferentially distributed filter sections 9031. Each filter section 9031 includes a porous elastic pad 12 (preferably made of waterproof rubber, but other materials can be selected according to actual needs). A flexible filter screen 13 (preferably made of polyester fiber, but other materials can be selected according to actual needs) is fixedly connected to the inner side of the porous elastic pad 12. The porous elastic pad 12 supports the flexible filter screen 13. At the same time, the elasticity of the porous elastic pad 12 allows it to vibrate under the action of the moving section 9032, thereby shaking off the metal debris on the flexible filter screen 13. The moving section 9032 is fixedly connected between each two adjacent filter cartridges 903. The slider 904 is installed on the moving section 9032. The filter section 9031 filters the coolant. The moving section 9032 moves repeatedly under the action of magnetic repulsion and centrifugal force, thereby driving the filter section 9031 to contract and vibrate, thereby achieving the purpose of self-cleaning of the filter cartridge 903.

[0039] Figure 12 As shown, the moving section 9032 includes a rigid moving piece 14 (preferably made of plastic, but other materials can be selected according to actual needs), and a magnetic piece 15 that is magnetically repelled by the magnetic strip 10 is fixedly embedded in the inner wall of the rigid moving piece 14. The magnetic piece 15 and the magnetic strip 10 repel each other magnetically, and the rigid moving piece 14 plays a shaping role. Under the magnetic repulsion force, the rigid moving piece 14 moves inward, and the rigid moving piece 14 in turn drives the filter section 9031 to contract inward. At the same time, the centrifugal force causes the rigid moving piece 14 to return to its original position. The two forces act back and forth, causing the rigid moving piece 14 to move repeatedly, which makes the filter section 9031 vibrate, thereby achieving the self-cleaning effect of the filter section 9031.

[0040] Figure 5 , 9As shown, multiple equally spaced sliders 904 are fixedly connected to both end sidewalls of the filter cartridge 903, and multiple grooves 905 matching the sliders 904 are provided on the inner wall of the mounting groove 9021. A water inlet is provided on the sidewall at the center of the inner disc 901, and a sealing sleeve 906 is fixedly connected to the sidewall of the inner disc 901 at the water inlet. An annular groove is provided on the inner wall of the sealing sleeve 906, and a sealing ring 9061 is fixedly connected to the inner wall of the annular groove by a spring. An annular groove matching the sealing ring 9061 is provided on the sidewall of the multi-hole water inlet pipe 6. After the sealing sleeve 906 is fitted onto the multi-hole water inlet pipe 6, the sealing ring 9061 engages with the annular groove, thus realizing the multi-hole water inlet pipe 6... The sealing connection with the sealing sleeve 906 allows the porous water inlet pipe 6 to rotate together with the shrinking vibration filter cartridge 9 under the drive of the stepped tower wheel 2, making it easy to disassemble and clean the shrinking vibration filter cartridge 9. The sealing sleeve 906 is fitted onto the porous water inlet pipe 6 and is snapped into place with the porous water inlet pipe 6. The coolant inside the water tank 101 enters the shrinking vibration filter cartridge 9 through the porous water inlet pipe 6. The coolant is filtered as it passes through the filter cartridge 903. The filter cartridge 903 can shrink and vibrate under the action of centrifugal force and magnetic repulsion force of the magnetic strip 10, thereby shaking off the metal debris attached to the filter cartridge 903 and effectively preventing the metal debris from accumulating on the filter cartridge 903 and causing blockage.

[0041] The working principle of this scheme is as follows: the coolant inside the water tank 101 enters the interior of the contraction-vibration filter cylinder 9 through the holes in the porous inlet pipe 6. The elastic column 803 uses its elasticity to keep the contact pad 801 tightly attached to the side wall of the stepped tower wheel 2. When the stepped tower wheel 2 rotates, it drives the friction disc 8 and the porous inlet pipe 6 to rotate by friction. The sealing ring 9061 engages with the porous inlet pipe 6, thereby driving the contraction-vibration filter cylinder 9 to rotate. During the rotation of the contraction-vibration filter cylinder 9, centrifugal force causes metal debris to settle on the contraction-vibration filter cylinder 9. After the heat sink 4 absorbs the heat of the coolant, it exchanges heat with the outside air to achieve effective cooling. The outlet pump 11 pumps the coolant back into the water tank 101 to achieve coolant circulation filtration. During the rotation of the contraction-vibration filter cylinder 9, when the moving section 9032 is directly opposite the magnetic strip 10, the two... The magnetic repulsion causes the moving section 9032 to move inward, which in turn causes the filter section 9031 to contract inward. When the moving section 9032 rotates past the magnetic strip 10, the centrifugal force causes the moving section 9032 to quickly return to its original position. This alternating action causes the moving section 9032 to move back and forth, which in turn causes the filter section 9031 to exhibit a contraction and vibration pattern. This effectively prevents a large amount of metal debris from accumulating on the filter section 9031 and causing blockage, thus achieving an effective self-cleaning effect. When it is necessary to replace or maintain the contraction and vibration filter cartridge 9, simply open the closed door 5 and pull out the contraction and vibration filter cartridge 9. When installing a new contraction and vibration filter cartridge 9, insert the contraction and vibration filter cartridge 9 into the porous water inlet pipe 6, and let the sealing ring 9061 engage with the porous water inlet pipe 6. Finally, close the closed door 5, and the turntable 501 is pressed against the outer plate 902 to stabilize it.

[0042] In light of current practical needs, the above-described embodiments adopted in this application are not limited to these. Any changes made within the scope of knowledge possessed by those skilled in the art without departing from the concept of this application still fall within the protection scope of this invention.

Claims

1. A steel fiber forming drawing machine, characterized in that: The machine includes a water tank type wire drawing machine body (1), which includes a water tank (101). Inside the water tank (101) are two symmetrically distributed stepped rollers (2) and a wire drawing die frame (3). A heat dissipation box (4) is fixedly connected to the outer wall of the water tank (101) opposite to the stepped rollers (2), and a closed door (5) is hinged on the heat dissipation box (4). A multi-hole water inlet pipe (6) is inserted into the inner wall of the water tank (101) opposite to the stepped rollers (2), and a rotating seal (7) connected to the side wall of the water tank (101) is fitted on the multi-hole water inlet pipe (6). A friction disc (8) is fixedly connected to one end of the multi-hole water inlet pipe (6), and the friction disc (8) is connected to the stepped rollers. (2) The side walls of the heat dissipation box (4) are abutted, and the inside of the heat dissipation box (4) is a shrink-vibration filter cylinder (9), and the multi-hole water inlet pipe (6) passes through the inside of the shrink-vibration filter cylinder (9). The inner wall of the closed door (5) is rotatably connected to a turntable (501), and the shrink-vibration filter cylinder (9) abuts against the turntable (501). The inner wall of the heat dissipation box (4) is fixedly connected to multiple equally spaced magnetic strips (10), and the magnetic strips (10) and the shrink-vibration filter cylinder (9) repel each other magnetically. The inner walls of the heat dissipation box (4) on both sides of the shrink-vibration filter cylinder (9) are equipped with water pumps (11), and the water outlet of the water pump (11) is connected to the inside of the water tank (101) through a water pipe.

2. The steel fiber forming drawing machine according to claim 1, characterized in that: The friction disc (8) includes two contact pads (801), and a sealing membrane (802) is fixedly connected between the sides of the two contact pads (801). Multiple elastic columns (803) are fixedly connected between the sidewalls of the two contact pads (801) and are distributed around each other at equal intervals. The elastic columns (803) are made of high elasticity material.

3. The steel fiber forming drawing machine according to claim 1, characterized in that: The retractable vibration filter cartridge (9) includes an inner disc (901) and an outer disc (902). The side walls of the inner disc (901) and the outer disc (902) are provided with mounting grooves (9021), and a filter cartridge (903) is placed between the two mounting grooves (9021). Multiple equally spaced sliders (904) are fixedly connected to the side walls of both ends of the filter cartridge (903). Multiple sliding grooves (905) matching the sliders (904) are provided on the inner wall of the mounting groove (9021). A water inlet is provided on the side wall at the center of the inner disc (901), and a sealing connecting sleeve (906) is fixedly connected to the side wall of the inner disc (901) at the water inlet. The sealing connecting sleeve (906) is fitted onto the porous water inlet pipe (6), and the sealing connecting sleeve (906) is engaged with the porous water inlet pipe (6).

4. The steel fiber forming drawing machine according to claim 3, characterized in that: The filter cartridge (903) includes multiple equally spaced filter sections (9031) arranged in a ring, and a movable section (9032) is fixedly connected between each two adjacent filter cartridges (903), and the slider (904) is mounted on the movable section (9032).

5. The steel fiber forming drawing machine according to claim 4, characterized in that: The filter section (9031) includes a porous elastic pad (12), and a flexible filter screen (13) is fixedly connected to the inner side of the porous elastic pad (12).

6. The steel fiber forming drawing machine according to claim 4, characterized in that: The moving segment (9032) includes a rigid moving piece (14), and the inner wall of the rigid moving piece (14) is fixedly inlaid with a magnetic piece (15) that is magnetically repelled by the magnetic strip (10).

7. A steel fiber forming drawing machine according to claim 3, characterized in that: The inner wall of the sealing connecting sleeve (906) is provided with an annular groove, and the inner wall of the annular groove is fixedly connected with a sealing ring (9061) by a spring. The side wall of the porous water inlet pipe (6) is provided with an annular groove that matches the sealing ring (9061).

8. The steel fiber forming drawing machine according to claim 1, characterized in that: The closed door (5) is also connected to the heat dissipation box (4) by a latch lock, and a sealing gasket is fixedly connected to the side of the closed door (5).

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