Polyester web hot air setting machine

Abstract

The present application relates to polyester net setting technical field, polyester net hot air setting machine is provided, hot air box includes: box, heater, is arranged in the top of second cavity, heater heats the gas into second cavity, nozzle, is arranged in first cavity and is communicated with second cavity, nozzle is used for spraying the heated gas to the surface of polyester net, heat exchange pipe, is arranged in first cavity, preheating channel, is set up in the side wall of nozzle, preheating channel has gas inlet end and exhaust end, gas inlet end is communicated with the side wall of heat exchange pipe, exhaust end is communicated with the inside of nozzle, the gas in heat exchange pipe is preheated and enters into the nozzle after preheating channel.By the above technical scheme, the problem that the heat of the hot air setting machine in the prior art is not recycled, which can cause large heat loss, and the air with lower temperature from the outside is reheated, which can increase the heating time and affect the setting effect of polyester net is solved.

Description

TECHNICAL FIELD

[0001] The present application relates to the polyester net setting technology field, specifically, relates to a polyester net hot air setting machine. BACKGROUND

[0002] The heat setting of the polyester net is to make the warp and weft of the net uniformly stretch and shrink under the same tension and temperature by using the thermal plasticity of the polyester filaments, and through the heat setting treatment, many performances of the net can be improved and enhanced, such as the strength, the reduction of the longitudinal and transverse strength ratio, the increase of the density, the improvement of the surface flatness, the smoothness of the net surface, the lightness of the net mark, the increase of the dimensional stability, etc., and at the same time, more stable crystals are generated in the fibers to enhance the physical and mechanical properties of the fibers and greatly enhance the service life of the net, therefore, the heat setting is a very important terminal process in the production of the polyester net, and the difference of the setting quality directly determines whether the net is qualified or not.

[0003] When the hot air setting machine is working, the hot air is blown out from the rack after heating the polyester net, but the part of the hot air itself still has a high temperature, if the part of the hot air is not reused, it will cause a large heat loss, and the air with a lower temperature outside is heated again, which will increase the heating time and further affect the setting effect of the polyester net.

[0004] Therefore, a new polyester net hot air setting machine is needed to solve the above problems. SUMMARY

[0005] The polyester net hot air setting machine solves the problem that in the related art, the hot air of the hot air setting machine is not reused, which causes a large heat loss, and the air with a lower temperature outside is heated again, which increases the heating time and further affects the setting effect of the polyester net.

[0006] The technical scheme of the present application is as follows:

[0007] The polyester net hot air setting machine comprises a rack, a driving roller, a tenter, a stretching vehicle and a hot air box installed on the rack, the hot air box provides a heat source for the setting of the polyester net, and the hot air box comprises:

[0008] A box body has a first cavity and a second cavity;

[0009] A heater is arranged at the top of the second cavity, and the heater heats the gas entering the second cavity;

[0010] A nozzle is arranged in the first cavity and communicates with the second cavity, and the nozzle is used for spraying the heated gas to the surface of the polyester net;

[0011] A heat exchange pipe is arranged in the first cavity;

[0012] A preheating channel is arranged in the sidewall of the nozzle, the preheating channel has an air inlet end and an air outlet end, the air inlet end is communicated with the sidewall of the heat exchange pipe, and the air outlet end is communicated with the inside of the nozzle, and the gas in the heat exchange pipe is preheated through the preheating channel and then enters the nozzle.

[0013] Preferably, the hot air box further comprises:

[0014] A fixed plate is arranged in the box, and the fixed plate divides the box into the first cavity and the second cavity.

[0015] A baffle is vertically arranged in the middle of the fixed plate, and the baffle divides the second cavity into a heating chamber and a pressurizing chamber.

[0016] An air inlet is arranged on the outer wall of the box, and the air inlet is communicated with the heating chamber.

[0017] A heater is arranged at the top of the heating chamber and used for heating the gas entering the heating chamber.

[0018] A pressurizer is arranged at the top of the pressurizing chamber and used for pressurizing the heated gas and then delivering the gas into the nozzle.

[0019] Preferably, the fixed plate comprises:

[0020] An air inlet grille is arranged on the fixed plate and located in the heating chamber, and the gas for heat exchange with the outer wall of the heat exchange pipe enters the heating chamber through the air inlet grille and is heated again.

[0021] Preferably, the box further comprises:

[0022] A fan is arranged on the box and located at the air inlet, and the fan is used for delivering the air outside to the heating chamber.

[0023] Preferably, the nozzle comprises:

[0024] An upper pipe penetrates through the fixed plate and is fixedly connected with the fixed plate, and the air inlet end of the upper pipe is communicated with the pressurizing chamber.

[0025] A lower pipe is fixedly connected with the outlet end of the upper pipe.

[0026] An adjusting piece is arranged in the lower pipe and slides along the axis direction of the lower pipe.

[0027] A fixing piece is arranged at the air outlet of the lower pipe.

[0028] Preferably, the lower pipe comprises:

[0029] A first cylinder;

[0030] A sliding groove is formed on the inner wall of the first cylinder along the first cylinder axis direction;

[0031] A sliding block is fixedly arranged on the side wall of the adjusting member, and the sliding block is in sliding connection with the sliding groove.

[0032] Preferably, the upper pipeline comprises:

[0033] A second cylinder, the preheating channel is formed in the side wall of the second cylinder, the air inlet end of the preheating channel is formed near the bottom side of the second cylinder, and the air outlet end of the preheating channel is formed near the top side of the second cylinder;

[0034] An air inlet pipe is arranged on the outer wall of the second cylinder, one end of the air inlet pipe is in communication with the air inlet end, and the other end of the air inlet pipe is in communication with the side wall of the heat exchange pipe.

[0035] Preferably, the heat exchange pipe comprises:

[0036] A pipe body is transversely arranged at the bottom of the first cavity and located at one side of the spray pipe, and both ends of the pipe body penetrate through the two side walls of the box, respectively;

[0037] An air inlet plate has an inner cavity structure, the inner cavity structure of the air inlet plate is in communication with the end of the pipe body, and the gas escaping from the side of the rack enters the pipe body through the air inlet plate;

[0038] A plurality of heat exchange plate groups are fixedly sleeved on the outer wall of the pipe body at equal intervals.

[0039] Preferably, the preheating channel is in a spiral type.

[0040] Preferably, the outer contour of the adjusting member is in an inverted circular truncated cone type, the adjusting member is hollow inside, the fixing member is in a conical type, and the tapered tip of the fixing member corresponds to the bottom surface of the adjusting member.

[0041] The present application has the following advantages:

[0042] 1. The spray pipe of the present application can recycle the hot gas after completing the heating work, collect the hot gas after completing the heating work through negative pressure suction, and make the hot gas after completing the heating work enter the heat exchange pipe for the first preheating, and then the second preheating in the preheating channel, so that the hot gas is used again after two preheatings, effectively reduces the time of forming hot air, and increases the hot air setting effect of the polyester net.

[0043] 2、The heat exchange pipe is arranged at the bottom of the box body, the bottom of the box body is close to the polyester net, the temperature of the position is higher, the heat exchange pipe can utilize the high temperature environment of the position to preheat the hot gas in the heat exchange pipe for the first time, the hot gas is accelerated to increase the temperature, and the hot air forming speed is accelerated. BRIEF DESCRIPTION OF DRAWINGS

[0044] The application will be further described in detail below in combination with the drawings and specific embodiments.

[0045] Figure 1 It is a structure schematic diagram of the hot air box of the application;

[0046] Figure 2 It is a structure schematic diagram of the hot air box of the application;

[0047] Figure 3 It is a structure schematic diagram of the second chamber of the hot air box of the application;

[0048] Figure 4 It is a side view of the internal structure of the application;

[0049] Figure 5 It is a structure schematic diagram of the heat exchange pipe of the hot air box of the application;

[0050] Figure 6 It is a structure schematic diagram of the internal structure of the nozzle of the application;

[0051] Figure 7 It is a top view of the nozzle of the application;

[0052] Figure 8 It is Figure 7 It is a sectional view at A-A;

[0053] Figure 9 It is a structure schematic diagram of the second chamber of the hot air box of the application;

[0054] Figure 10 It is a structure schematic diagram of the box body of the application;

[0055] Figure 11 It is a front view of the polyester net hot air setting machine of the application;

[0056] Figure 12 It is a side view of the polyester net hot air setting machine of the application.

[0057] In the figure, 1. box body; 2. nozzle; 201. second cylinder; 202. preheating channel; 203. first cylinder; 204. slide; 205. slider; 206. adjustment member; 207. fixing member; 3. air intake plate; 4. fan; 5. air inlet; 6. air intake grille; 7. fixing plate; 8. baffle; 9. first cavity; 10. pressurized chamber; 11. second cavity; 12. heating chamber; 13. heater; 14. heat exchange tube; 15. heat exchange plate group; 16. air intake pipe; 17. frame; 18. stretching track; 19. stretching car; 20. drive roller; 21. stretching roller; 22. tentering wire rod; 23. tentering frame; 24. tentering drive motor; 25. T-beam carriage guide rail; 26. tenter; 27. needle plate system; 28. polyester mesh. DETAILED DESCRIPTION

[0058] The following will be combined with the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making any creative efforts are within the scope of protection of the present invention.

[0059] like Figures 1-12 As shown, this embodiment provides a polyester web hot air setting machine, including a frame 17, a driving roller 20 mounted on the frame 17, a tenter 26, a stretching car 19 and a hot air box, the hot air box provides a heat source for setting the polyester web 28, and the hot air box includes:

[0060] The box body 1 has a first cavity 9 and a second cavity 11;

[0061] A heater 13 is provided at the top of the second cavity 11 and is used to heat the gas entering the second cavity 11;

[0062] The nozzle 2 is disposed in the first cavity 9 and communicates with the second cavity 11. The nozzle 2 is used to spray the heated gas onto the surface of the polyester mesh 28.

[0063] The heat exchange tube 14 is disposed in the first cavity 9;

[0064] The preheating channel 202 is opened in the side wall of the nozzle 2. The preheating channel 202 has an air inlet end and an exhaust end. The air inlet end is connected to the side wall of the heat exchange tube 14, and the exhaust end is connected to the inside of the nozzle 2. The gas in the heat exchange tube 14 is preheated through the preheating channel 202 and then enters the nozzle 2.

[0065] In the above scheme, it needs to be explained that the hot air box is divided into upper air box and lower air box, and the upper air box and the lower air box of the device can adopt the structure of the device. In addition, it can be understood that the rack 17, the driving roller 20, the tentering device 16 and the stretching vehicle 19 installed on the rack 17, and the matching stretching rail 18, the driving roller 20, the stretching roller 21, the tentering screw 22, the tentering frame 23, the tentering driving motor 24, the T-shaped beam type walking vehicle guide rail 25 and the needle plate system 27 etc. of the device are all existing devices, and will not be described in detail here.

[0066] Wherein, the hot air completed heating is preheated twice by the heat exchange pipe 14 and the preheating channel 202, so that the hot air can enter the nozzle 2 again for use, realizing waste heat recovery and reusing of hot air, effectively reducing the energy consumption of the hot air setting machine.

[0067] Further, the hot air box further comprises:

[0068] The fixed plate 7 is arranged in the box body 1, and the fixed plate 7 divides the box body 1 into the first cavity 9 and the second cavity 11;

[0069] The baffle 8 is vertically arranged in the middle of the fixed plate 7, and the baffle 8 divides the second cavity 11 into the heating chamber 12 and the pressurizing chamber 10;

[0070] The air inlet 5 is arranged on the outer wall of the box body 1, and the air inlet 5 is communicated with the heating chamber 12;

[0071] The heater 13 is arranged at the top of the heating chamber 12, and is used for heating the gas entering the heating chamber 12;

[0072] The pressurizer is arranged at the top of the pressurizing chamber 10, and is used for conveying the heated gas into the nozzle 2 after being pressurized.

[0073] In the above scheme, the pressurizer adopts the axial flow fan 4, and the gas heated by the heater 13 is in the form of high-speed airflow into the nozzle 2, and high-speed airflow is also formed in the nozzle 2, and then the hot air is sprayed into the polyester net 28 through the nozzle 2. It needs to be explained that the heater 13 adopts a heating furnace, the heater 13 heats the gas sent into the heating chamber 12 by the fan 4, and then the heated gas is sent into the pressurizing chamber 10 for pressurization; the baffle 8 adopts a heat insulation plate to prevent the temperature in the pressurizing chamber 10 from changing greatly.

[0074] Further, the fixed plate 7 comprises:

[0075] The air inlet grille 6 is arranged on the fixed plate 7 and located in the heating chamber 12, and the gas for heat exchange with the outer wall of the heat exchange pipe 14 enters the heating chamber 12 again through the air inlet grille 6 for heating.

[0076] In the above scheme, it needs to be explained that, since the polyester net hot air setting machine adopts the design of upper and lower air boxes, when the polyester net 28 hot air setting work is carried out, the air of the other air box will enter the box 1, and this part of the gas can not only participate in heat exchange, but also enter the heating chamber 12 from the air inlet grille 6 to be heated again, realizing the reuse of this part of the hot gas.

[0077] Further, the box 1 further comprises:

[0078] The fan 4 is arranged on the box 1 and located at the air inlet 5, and the fan 4 is used to deliver the air outside to the heating chamber 12.

[0079] In the above scheme, the fan 4 delivers air to the heating chamber 12 of the box 1, which ensures that the heating chamber 12 can quickly heat the air, and the fan 4 can also make the position of the air inlet grille 6 in a negative pressure state, so that the gas entering the box 1 after heat exchange with the heat exchange pipe 14 can enter the heating chamber 12 to be heated again.

[0080] Further, the nozzle 2 comprises:

[0081] The upper pipe penetrates the fixing plate 7 and is fixedly connected with the fixing plate 7; the air inlet end of the upper pipe is in communication with the pressurizing chamber 10;

[0082] The lower pipe is fixedly connected with the outlet end of the upper pipe;

[0083] The adjusting part 206 is arranged in the lower pipe in the direction of the axis of the lower pipe and slides in the lower pipe; the outer contour of the adjusting part 206 is in the shape of an inverted circular truncated cone, and the adjusting part 206 is hollow inside;

[0084] The fixing part 207 is arranged at the air outlet of the lower pipe. The fixing part 207 is in the shape of a circular cone, and the tapered tip of the fixing part 207 corresponds to the bottom surface of the adjusting part 206.

[0085] In the above scheme, the connection mode of the upper pipe and the lower pipe is welding or threaded connection, wherein the inside of the upper pipe is communicated with the high-speed flowing heated gas, when the gas in the preheating channel 202 is preheated, the gas in the preheating channel 202 will enter the upper pipe from the top of the upper pipe, and the entering direction of the gas in the preheating channel 202 is tangent to the gas flow direction of the upper pipe, so that the gas flow in the preheating channel 202 will form a vortex with the gas flow in the upper pipe, improving the mixing effect of the two gas flows, and after mixing, the mixed gas will enter the lower pipe at a high speed.

[0086] In addition, the fixing member 207 and the adjusting member 206 of the lower pipe are matched with each other, and by sliding the adjusting member 206 up and down, the distance between the adjusting member 206 and the fixing member 207 can be changed, so that the hot gas in the nozzle 2 is evenly distributed along the fixing member 207, preventing the hot gas in the nozzle 2 from directly washing the local position of the polyester net 28, and by changing the distance between the adjusting member 206 and the fixing member 207, the angle of the hot gas injection can also be fine-tuned to match the stretching action of the polyester net 28, ensuring that each part of the polyester net 28 can be evenly heated. It can be understood that the adjusting member 206 and the fixing member 207 in the device can be slidably connected with the inner wall of the lower pipe.

[0087] Further, the lower pipe comprises:

[0088] The first cylinder body 203;

[0089] The sliding groove 204 is formed on the inner wall of the first cylinder body 203 along the axis direction of the first cylinder body 203,

[0090] The sliding block 205 is fixedly arranged on the side wall of the adjusting member 206, and the sliding block 205 is slidably connected with the sliding groove 204.

[0091] It can be understood that the movement of the sliding block 205 and the sliding groove 204 is adjusted manually, that is, before the hot air setting operation is performed, the sliding block 205 is pushed up and down along the sliding groove 204 by manual operation, for adjusting the distance between the fixing member 207 and the adjusting member 206. It should be noted that the fixing member 207 can also be slidably connected with the inner wall of the lower pipe. The fixing member 207 can partially protrude outside the lower pipe to change the injection angle of the hot gas flow.

[0092] Further, the upper pipe comprises:

[0093] The second cylinder body 201, the preheating channel 202 is formed in the side wall of the second cylinder body 201, the gas inlet end of the preheating channel 202 is formed near the bottom side of the second cylinder body 201, and the gas outlet end of the preheating channel 202 is formed near the top side of the second cylinder body 201;

[0094] The gas inlet pipe 16 is arranged on the outer wall of the second cylinder body 201, one end of the gas inlet pipe 16 is in communication with the gas inlet end, and the other end of the gas inlet pipe 16 is in communication with the side wall of the heat exchange pipe 14.

[0095] The preheating channel 202 is in a spiral shape.

[0096] In the above scheme, the spiral preheating channel 202 can increase the flow path of the gas inside the preheating channel 202, increase the preheating time, and improve the preheating effect. It can be understood that in order to improve the preheating effect, the second cylinder 201 is made of a material with good heat conduction effect, such as copper. And the spiral channel outlet is opened at the bottom of the second cylinder 201, and the gas to be preheated rises from the bottom to the top of the inside of the nozzle 2, which can make the gas to be preheated fill the preheating pipeline and improve the preheating effect. In addition, it should be noted that the gas in the nozzle 2 is high-speed flowing gas, so a negative pressure state will be formed in the preheating channel 202, so the preheating channel 202 can attract the gas to be preheated into the heat exchange pipe 14 and the preheating channel 202.

[0097] Further, the heat exchange pipe 14 comprises:

[0098] The pipe body is transversely arranged at the bottom of the first cavity 9 and located at one side of the nozzle 2, and the two ends of the pipe body respectively penetrate through the two side walls of the box body 1.

[0099] The gas escaping from the side of the rack passes through the air inlet plate 3 and enters the pipe body.

[0100] The heat exchange plate group 15 is provided with a plurality of heat exchange plate groups 15 which are fixed on the outer wall of the pipe body at equal intervals.

[0101] In the above scheme, the pipe body is a square tube or a circular tube, and the heat exchange plate group 15 is a heat exchange fin. The heat exchange fin exchanges heat with the heat of the hot air shaping work surface to preliminarily increase the temperature of the gas to be preheated. The air inlet plate 3 is a hollow side plate which quickly recovers the hot air from the side of the rack. The air inlet plate 3 works by inhaling under the negative pressure of the nozzle 2.

[0102] The above is only a preferred embodiment of the present application and is not intended to limit the present application. Any modification, equivalent replacement, improvement, etc. made within the spirit and principles of the present application shall be included in the protection scope of the present application.

Claims

1. A polyester web hot air setting machine comprising a frame, a driving roller mounted on the frame, a tenter, a stretching vehicle and a hot air box, wherein the hot air box provides a heat source for setting the polyester web, and is characterized in that: The hot air box comprises: A box body (1) having a first cavity (9) and a second cavity (11); a heater (13), disposed at the top of the second cavity (11), the heater (13) being used to heat the gas entering the second cavity (11); a nozzle (2) disposed in the first cavity (9) and communicating with the second cavity (11), the nozzle (2) being used to spray heated gas toward the surface of the polyester mesh (28); A heat exchange tube (14) is arranged in the first cavity (9); the heat exchange tube (14) comprises: A tube body is placed horizontally at the bottom of the first cavity (9) and located on one side of the nozzle (2), with both ends of the tube body respectively penetrating the two side walls of the box body (1); An air intake plate (3) has an inner cavity structure, the inner cavity structure of the air intake plate is communicated with the end of the tube body, and the gas escaping from the side of the frame enters the tube body through the air intake plate; There are multiple heat exchange plate groups (15), and the multiple heat exchange plate groups (15) are fixedly sleeved on the outer wall of the tube body at equal intervals; A preheating channel (202) is provided in the side wall of the nozzle (2), and the preheating channel (202) has an air inlet end and an air outlet end, the air inlet end is in communication with the side wall of the heat exchange tube (14), and the air outlet end is in communication with the interior of the nozzle (2), and the gas in the heat exchange tube (14) is preheated through the preheating channel (202) and then enters the nozzle (2); The hot air box also includes: A fixing plate (7) is arranged in the box body (1), and the fixing plate (7) separates the box body (1) into the first cavity (9) and the second cavity (11); a baffle (8) vertically arranged in the middle of the fixed plate (7), wherein the baffle (8) separates the second cavity (11) into a heating chamber (12) and a pressurizing chamber (10); An air inlet (5) is provided on the outer wall of the box body (1), and the air inlet (5) is communicated with the heating chamber (12); a heater (13), disposed on the top of the heating chamber (12), for heating the gas entering the heating chamber (12); The pressurizer is arranged at the top of the pressurizing chamber (10) and is used to pressurize the heated gas and then transport it into the nozzle (2).

2. The polyester net hot air setting machine according to claim 1, characterized in that: The fixing plate (7) comprises: An air intake grille (6) is provided on the fixing plate (7) and is located in the heating chamber (12). The gas that exchanges heat with the outer wall of the heat exchange tube (14) enters the heating chamber (12) through the air intake grille (6) and is heated again.

3. The polyester net hot air setting machine according to claim 1, characterized in that: The box (1) further comprises: A fan (4) is provided on the box body (1) and is located at the air inlet (5). The fan (4) is used to transport external air into the heating chamber (12).

4. The polyester net hot air setting machine according to claim 1, characterized in that: The nozzle (2) comprises: an upper pipe, the upper pipe passing through the fixed plate (7) and fixedly connected to the fixed plate (7); an air inlet end of the upper pipe being in communication with the pressurized chamber (10); a lower pipe, fixedly connected to the outlet end of the upper pipe; An adjusting member (206) is slidably arranged in the lower pipe along the axis of the lower pipe; A fixing member (207) is arranged at the air outlet of the lower pipe.

5. The polyester net hot air setting machine according to claim 4, characterized in that: The lower pipeline includes: a first cylinder (203); A chute (204) is provided on the inner wall of the first cylinder (203) along the axis of the first cylinder (203); The slider (205) is fixedly arranged on the side wall of the adjusting member (206), and the slider (205) is slidably connected to the sliding groove (204).

6. The polyester net hot air setting machine according to claim 4, characterized in that: The upper pipeline comprises: A second cylinder (201), wherein the preheating channel (202) is opened in a side wall of the second cylinder (201), an air inlet end of the preheating channel (202) is opened near a bottom side of the second cylinder (201), and an air outlet end of the preheating channel (202) is opened near a top side of the second cylinder (201); An air intake pipe (16) is arranged on the outer wall of the second cylinder (201), one end of the air intake pipe (16) is connected to the air intake end, and the other end of the air intake pipe (16) is connected to the side wall of the heat exchange tube (14).

7. The polyester net hot air setting machine according to claim 1, characterized in that: The preheating channel (202) is spiral-shaped.

8. The polyester net hot air setting machine according to claim 4, characterized in that: The outer contour of the adjusting member (206) is in the shape of an inverted truncated cone, and the interior of the adjusting member (206) is hollow; the fixing member (207) is in the shape of a cone, and the cone tip of the fixing member (207) corresponds to the bottom surface of the adjusting member (206).

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