CN108592538B - A drying structure for reducing log plank moisture content - Google Patents
A drying structure for reducing log plank moisture content Download PDFInfo
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- CN108592538B CN108592538B CN201810400672.XA CN201810400672A CN108592538B CN 108592538 B CN108592538 B CN 108592538B CN 201810400672 A CN201810400672 A CN 201810400672A CN 108592538 B CN108592538 B CN 108592538B
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Classifications
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B9/00—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards
- F26B9/06—Machines or apparatus for drying solid materials or objects at rest or with only local agitation; Domestic airing cupboards in stationary drums or chambers
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B23/00—Heating arrangements
- F26B23/10—Heating arrangements using tubes or passages containing heated fluids, e.g. acting as radiative elements; Closed-loop systems
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/008—Seals, locks, e.g. gas barriers or air curtains, for drying enclosures
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/063—Movable containers or receptacles, e.g. carts, trolleys, pallet-boxes
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/08—Parts thereof
- F26B25/12—Walls or sides; Doors
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B25/00—Details of general application not covered by group F26B21/00 or F26B23/00
- F26B25/06—Chambers, containers, or receptacles
- F26B25/14—Chambers, containers, receptacles of simple construction
- F26B25/18—Chambers, containers, receptacles of simple construction mainly open, e.g. dish, tray, pan, rack
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B5/00—Drying solid materials or objects by processes not involving the application of heat
- F26B5/04—Drying solid materials or objects by processes not involving the application of heat by evaporation or sublimation of moisture under reduced pressure, e.g. in a vacuum
-
- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F26—DRYING
- F26B—DRYING SOLID MATERIALS OR OBJECTS BY REMOVING LIQUID THEREFROM
- F26B2210/00—Drying processes and machines for solid objects characterised by the specific requirements of the drying good
- F26B2210/16—Wood, e.g. lumber, timber
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- Engineering & Computer Science (AREA)
- Mechanical Engineering (AREA)
- General Engineering & Computer Science (AREA)
- Life Sciences & Earth Sciences (AREA)
- Chemical & Material Sciences (AREA)
- Combustion & Propulsion (AREA)
- Sustainable Development (AREA)
- Health & Medical Sciences (AREA)
- Molecular Biology (AREA)
- Drying Of Solid Materials (AREA)
Abstract
The invention discloses a drying structure for reducing the water content of a log board, which comprises a tank body and an end cover, wherein a liquid collecting tank is arranged on the inner wall of the bottom of the tank body along the axis of the tank body, guide rails are respectively arranged at two ends of the liquid collecting tank, a sliding chute is arranged on the upper surface of each guide rail, a plurality of suction holes are arranged on the inner wall of the top of the tank body along the axis of the tank body, the suction holes are communicated with suction pipes arranged on the outer wall of the tank body, a clamping groove is arranged on the upper surface of each longitudinal plate, and a plurality of sliding blocks are arranged in the middle of the lower surface. The invention carries out heating treatment on the log in a vacuum environment, and discharges steam in the tank body in time, thereby ensuring that the wood in the tank body is heated uniformly, the drying degrees of the wood in different placing positions are consistent, simultaneously ensuring that the drying thermal efficiency of the wood is positively correlated with the drying cost, and realizing the maximization of the drying thermal efficiency of the wood in the drying tank.
Description
Technical Field
The invention relates to the field of log processing, in particular to a drying structure for reducing the water content of a log board.
Background
The timber needs to go through a plurality of processes from raw wood to the final finished product, wherein the drying of the timber is to ensure the quality of the timber and the wooden products and prolong the service life, and proper measures must be taken to reduce the moisture (water content) in the timber to a certain degree. As a large energy consumer in the wood processing industry, wood drying accounts for 40-70% of the energy consumption of wood processing, while the thermal efficiency of drying is generally low, usually only between 30-40%; furthermore, the pollution caused by the drying process is often an important source of environmental pollution in China, and in the case of a steam drying plant with an annual drying capacity of 1 ten thousand cubic meters, the harmful substances discharged per hour are about: the smoke amount is about 40Kg, carbon dioxide is 1900 cubic meter, sulfur dioxide is 45 cubic meter, and a small amount of nitrogen oxide is also contained, which are main factors causing the greenhouse effect of the atmosphere, acid rain and ozone damage. The reason for this is that, in the case of drying wood, a general drying can cannot effectively use its limited space, and the efficiency in drying is low, and a secondary drying process is required, that is, the energy consumption for processing is increased again.
Disclosure of Invention
The invention aims to provide a drying structure for reducing the water content of a log board, and the maximization of the heat efficiency of a drying tank in wood drying is realized.
The purpose of the invention is realized by the following technical scheme:
a drying structure for reducing the water content of a log board comprises a tank body and an end cover for sealing the tank body, wherein a liquid collecting groove is formed in the inner wall of the bottom of the tank body along the axis of the tank body, guide rails parallel to the axis of the tank body are respectively arranged at two ends of the liquid collecting groove, a sliding groove is formed in the upper surface of each guide rail, a plurality of suction holes are formed in the inner wall of the top of the tank body along the axis of the tank body and communicated with suction pipes arranged on the outer wall of the tank body, the drying structure further comprises a rectangular bracket formed by splicing two transverse plates and two longitudinal plates, a clamping groove is formed in the upper surface of each longitudinal plate, and a plurality of sliding blocks matched with the sliding grooves are arranged in the middle of the lower surface of each transverse plate; follow the axial of jar body is equipped with in the jar body wall and is spiral helicine hot flow pipe and be spiral helicine cold flow pipe, and hot flow pipe and cold flow pipe are independent each other and crisscross the distribution, and two tip of hot flow pipe run through jar body back and heat source intercommunication, and two tip of cold flow pipe run through jar body back and cold source intercommunication.
In the prior art, logs are subjected to processes such as drying, corrosion prevention, flame retardance and the like in sequence after being cut and partitioned so as to ensure that the woods can ensure stable and long-term use performance when being used at the later stage, wherein the logs are usually subjected to centralized heating treatment in a closed space when being dried, the moisture content of partial woods is extremely low when the woods are accumulated in the limited closed space, the moisture content of the rest woods is overhigh, and once the logs are dried in a dispersed placement mode, the drying thermal efficiency is reduced in a limited drying region, and the drying cost is increased; in contrast, the applicant designs a vacuum tank special for drying logs, the vacuum tank is used for heating logs in a vacuum environment and discharging steam in the tank body in time, so that wood in the tank body is uniformly heated, the drying degrees of the wood in different placing positions are consistent, the drying thermal efficiency of the wood is positively correlated with the drying cost, and the maximization of the wood drying thermal efficiency of the drying tank is realized; when the wood drying device is used specifically, firstly, the drying tank is uncovered, then the rectangular bracket formed by the transverse plates and the longitudinal plates is pulled out along the guide rail, the upper surface of the longitudinal plates is provided with a plurality of clamping grooves, two ends of wood cut into plate shapes can be placed in the clamping grooves, the wood drying device is different from the existing stacking mode when placed, numerous wood materials can be the same as the building mode of building blocks, a plurality of vertically placed wood plates are clamped in the clamping grooves to be used as a base layer, then a horizontally placed drainage wood plate is laid on the base layer to be used as a connecting layer, and the like is performed in sequence until the internal space of the tank body is filled, namely a certain gap is reserved between every two adjacent plate-shaped wood materials, the heating assembly can fully diffuse the heat in the tank body to each surface of the numerous original wood plates when in work to improve the heat efficiency, and the numerous wood materials are mutually extruded, so that excessive drying shrinkage can be avoided in the drying process, Warping deformation; after the timber is placed, pushing the bracket into the tank body, then sealing the cover, starting a vacuum pump communicated with a suction pipe to enable the tank body to be in a vacuum environment, and then connecting a heating assembly with high-frequency current to start a timber drying process; and in the drying process, the vacuum pump continuously works, the steam pressure is reduced because the wood is in a vacuum state, so that the moisture on the surface of the wood reaches a saturated state and is evaporated, the moisture is timely discharged and recovered by the vacuum pump, the moisture in the wood is continuously permeated, evaporated and discharged to the surface, the three processes are continuously carried out, and the purpose of drying the wood is achieved in a short time.
Furthermore, the wood in the tank body is not contacted with the inner wall of the tank body through the guide rail and the bracket, so that the probability of overhigh local temperature of the wood in the drying process is reduced, and the quality of the dried wood is ensured; the high-frequency drying and the vacuum state are combined, the low boiling point of water in the vacuum state is mainly utilized, the wood can be dried at the low temperature, the drying device is particularly suitable for drying the wood which has the cracking phenomenon when the temperature is slightly high, such as hardwood or valuable wood, and the like, the vacuum state is a negative pressure state, a certain water absorption effect is achieved, the drying device is just similar to a high-frequency pressure gradient, the water discharge of the wood core part is accelerated, a part of liquid water can be remained at the bottom of the tank body in the drying process, and the phenomenon that the liquid water overflows when the cover of the drying tank is opened is avoided through collection of the liquid collecting tank.
The hot flow pipe is arranged on the wall of the tank body, a heat medium is continuously injected through a heat source to heat the tank body, the hot flow pipe is spiral, the tank body can be wrapped in an all-dimensional mode, meanwhile, the interior of the tank body can be uniformly heated, and therefore the maximization of the wood board drying efficiency is guaranteed; and because the drying of the wood boards is usually carried out in batches and continuously, the required drying temperature is different when the boards of different materials are dried, when the drying temperature required by the next batch of wood boards is lower than the drying temperature of the previous batch, the tank body needs to be quickly cooled to prevent the wood boards from being excessively dried, therefore, the applicant is also provided with spiral cold flow pipes on the wall of the tank body, the cold flow pipes and the hot flow pipes are mutually independent and distributed in a staggered way, namely, when different wood boards are replaced for the drying process, the injection of the hot medium in the hot flow pipes is suspended, the hot medium is injected into the cold flow pipes, the heat exchange principle is utilized to quickly take away a part of heat on the tank body by the cold medium, when the internal temperature of the tank body meets the requirement of a low-temperature environment, the injection of the cold medium is stopped, and a proper amount of the hot medium is injected, the working hours consumed when different wood boards are dried in batches are shortened.
Follow the axial of the jar body is equipped with spacing section of thick bamboo on its top outer wall, is equipped with thermal-insulated base at jar body upper surface, and the cylinder setting is on thermal-insulated base jar body top, the round pin post pass through universal ball with the end cover inside wall is connected it has the through-hole to open on the top outer wall of the jar body, the round pin post activity runs through behind through-hole, the spacing section of thick bamboo and is connected with the output of cylinder, and opens along the circumference of spacing section of thick bamboo on its inner circumferential wall and has radial groove, be equipped with on the outer circumferential wall of round pin post with radial groove matched with fixture block, keep away from at spacing section of thick bamboo it has movable groove I with radial groove intercommunication to open on the one end inner wall of end cover, just movable groove. Furthermore, the volume of the body of the drying tank is matched with the processing capacity of the drying tank, namely the larger the drying processing capacity is, the larger the volume is, and the drying time of the wood in the tank body is greatly shortened by adopting a high-frequency vacuum combination mode, so that the opening and closing frequency of the drying tank is higher, and the tank body is heated, so that the opening and closing of the end cover generally needs to be assisted by external driving equipment, the driving equipment comprises a winch, the winch is arranged on a heat insulation base on the cylinder, the winch is arranged above the tank body and is connected with the outer side wall of the end cover through a traction rope, when the cover is opened and closed, the cylinder is started, the cylinder pushes the pin to do linear motion in the limiting cylinder, namely, the output end of the cylinder pushes the pin to move in the direction far away from the tank body when the cover is opened, the end cover is separated from the tank body, and the output end of the cylinder drives the, contacting the end cap with the can body; wherein, around the drying process of timber goes on, need uncap, the end cover needs to rotate in order to realize the maximize of jar body open end area promptly, when uncapping promptly, the cylinder at first starts, promote the round pin post and remove, force the fixture block to enter into radial groove along activity groove I simultaneously, then through starting supplementary drive arrangement, start the hoist engine promptly, make the end cover carry out circular motion around the round pin post, open the end totally with jar body, meanwhile, the fixture block can't carry out linear motion on the horizontal direction after entering into radial groove, and then prevent that the end cover from producing excessive displacement and leading to the load of round pin post too big, ensure the stability in use of round pin post.
The inner wall of one end, close to the end cover, of the limiting cylinder is provided with a movable groove II communicated with the radial groove, and the movable groove II and the movable groove I are symmetrically distributed on two sides of the radial groove. Further, still be equipped with on the perisporium in spacing section of thick bamboo with I mutual symmetry's of activity movable groove II for under the prerequisite that does not use external auxiliary drive equipment, carrying out abluent in-process to jar body and bracket, start the cylinder, can promote the end cover level to apart from jar position far away of body, in order to make things convenient for pulling out of bracket and the clearance of collecting tank.
The movable groove I and the movable groove II are far away from one end portion of the radial groove is provided with a pressure sensor, the pressure sensor is electrically connected with an external display, springs are arranged in the movable groove I and the movable groove II, one end of each spring is connected with the pressure sensor, and the other end of each spring is opposite to the radial groove. Furthermore, no matter the tank body is dried or cleaned, the moving amount of the pin column in the horizontal direction cannot be excessive, accordingly, the applicant is provided with pressure sensors at the end parts of the ends, far away from the radial groove, of the movable grooves I and II, springs are arranged in the movable grooves I and II, the clamping blocks can generate an extrusion force on the springs when moving to the limit positions in the movable grooves I and II, the extrusion force can be detected by the pressure sensors and transmitted to an external display to be displayed, and a worker can timely judge whether the movement of the clamping blocks is proper or not according to the initial value and the final detection value of the pressure sensors, so that subsequent operation is facilitated, and meanwhile, the pin column is prevented from being damaged.
The end cover is provided with a plurality of butt joint grooves along the circumferential direction of the tank body on the end face of the open end of the tank body, a rubber ring is arranged on the inner side wall of the end cover, and a plurality of rubber bulges matched with the butt joint grooves are arranged on the rubber ring. Furthermore, because the tank body is always in a closed state in the drying process, and the end cover is a movable part, the applicant is provided with a rubber ring on the inner side wall of the end cover, and is also provided with a plurality of rubber protrusions on the inner side wall along the circumferential direction of the rubber ring, and is provided with a plurality of butt joint grooves matched with the rubber protrusions on the open end face of the tank body, namely, during the cover sealing, a plurality of different sealing sections can be formed between the tank body and the end cover through the plurality of rubber protrusions and the rubber ring, so as to maintain the closed environment in the tank body, and meanwhile, the rubber protrusions are limited by the butt joint grooves when being deformed by heat, and completely seal the butt joint grooves, thereby improving the sealing performance of the tank body.
In the axial direction of the tank body, the plurality of suction holes are distributed into two rows, and the central angle corresponding to the arc length between the two rows of suction holes is 40-70 degrees. Preferably, the plurality of suction holes are uniformly distributed in two rows, the two rows of suction holes are positioned on the inner wall of the top of the tank body, and the central angle corresponding to the arc length between the two rows of suction holes is 40-70 degrees, so that the water vapor generated in the tank body can be quickly discharged outwards due to the distribution of the suction holes, and meanwhile, excessive heat in the tank body cannot be pumped away.
The suction hole comprises a reduced section, a straight section and an enlarged section which are coaxial, the inner diameter of the reduced section is gradually decreased along the axis from the inside of the tank body to the outside of the tank body, the small diameter end of the reduced section is connected with one end of the straight section, the large diameter end of the reduced section is right opposite to the inside of the tank body, the inner diameter of the enlarged section is gradually increased along the axis from the inside of the tank body to the outside of the tank body, and the small diameter end of the enlarged section is connected with the other end of the straight section. Furthermore, the arrangement of the suction hole is not the traditional through hole shape, but the special design is made for the motion state of the steam when the steam in the tank body is pumped, because the vacuum pump is used for pumping, the moving speed of the steam is relatively high, meanwhile, the large impact is formed on the inner wall of the pumping hole and the suction pipe, and because the tank body and the suction pipe are made of metal materials, after the tank body or the suction pipe is damaged by the impact, the high-temperature steam is easy to corrode the damaged part, and further the service life of the tank body and the suction pipe is rapidly reduced, therefore, the applicant divides the suction hole into three parts, namely a reduced section, a flat section and an enlarged section, and in the direction that the tank body is radially directed from the inside to the outside, the inner diameter of the reduced section is gradually reduced, the inner diameter of the enlarged section is gradually increased, the inner diameter of the flat section is kept unchanged, and after the steam is drawn, the steam enters the reduction section firstly, and the retention time of the steam in the tank body cannot be too long in the drying process, so that the flow cross section is suddenly reduced when the steam moves from the inside of the tank body to the inside of the reduction section, the flow speed of the steam is suddenly increased, the steam enters the expansion section after the smooth transition of the straight section, the flow cross section of the steam is changed again, the small flow cross section is changed into the large flow cross section, the flow speed of the steam is reduced at the moment, the steam is discharged outwards after passing through the suction pipe at the normal moving speed, the impact on the suction hole and the suction pipe is greatly reduced at the moment, the tank body and the suction pipe are prevented from being damaged or corroded by the steam, and the service life of the drying structure is prolonged.
The axial length of the expanding section is smaller than that of the reducing section. Preferably, the axial length of the expansion section is greater than that of the reduction section, so that the time of the speed attenuation of the steam in the flowing process is prolonged, the speed of the steam discharged outwards through the suction pipe is within a reasonable numerical range, and the damage of the high-temperature steam to each circulation pipeline is reduced to the maximum extent on the premise of ensuring the steam discharge efficiency in the tank body.
Compared with the prior art, the invention has the following advantages and beneficial effects:
1. according to the invention, the log is heated in a vacuum environment, and the steam in the tank body is discharged in time, so that the wood in the tank body is uniformly heated, the drying degrees of the wood in different placing positions are consistent, the positive correlation between the drying thermal efficiency of the wood and the drying cost is ensured, and the maximization of the wood drying thermal efficiency of the drying tank is realized;
2. in the drying process, the vacuum pump continuously works, the steam pressure is reduced because the wood is in a vacuum state, so that the moisture on the surface of the wood is saturated and evaporated, and the moisture is timely discharged and recovered by the vacuum pump, the moisture in the wood is continuously permeated, evaporated and discharged to the surface, the three processes are continuously carried out, and the purpose of drying the wood is achieved in a short time;
3. when the steam moves from the inside of the tank body to the inside of the reduced section, the flow cross section is suddenly reduced, so that the flow velocity of the steam is suddenly increased, the steam enters the enlarged section after the smooth transition of the straight section, the flow cross section of the steam is changed again, the small flow cross section is changed into the large flow cross section, the flow velocity of the steam is reduced at the moment, the steam is discharged outwards after passing through the suction pipe at the normal moving speed, the impact on the suction hole and the suction pipe is greatly reduced at the moment, the tank body and the suction pipe are prevented from being damaged or corroded by the steam, and the service life of the drying structure is prolonged.
Drawings
The accompanying drawings, which are included to provide a further understanding of the embodiments of the invention and are incorporated in and constitute a part of this application, illustrate embodiment(s) of the invention and together with the description serve to explain the principles of the invention. In the drawings:
FIG. 1 is a schematic structural view of the present invention;
FIG. 2 is a schematic end view of a can body;
FIG. 3 is a schematic structural view of a position-limiting cylinder;
FIG. 4 is a schematic structural view of the pin;
FIG. 5 is a side view of the present invention;
FIG. 6 is a cross-sectional view of a can body;
fig. 7 is a schematic structural view of the drawing hole.
Reference numbers and corresponding part names in the drawings:
1-tank body, 2-end cover, 3-handle, 4-suction hole, 5-side plate, 6-transverse plate, 7-suction pipe, 8-guide rail, 9-collecting tank, 10-longitudinal plate, 11-clamping groove, 12-sliding groove, 13-pin column, 14-butt joint groove, 15-clamping block, 16-limiting cylinder, 17-pressure sensor, 18-spring, 19-movable groove I, 20-radial groove, 21-movable groove II, 22-cylinder, 23-hot flow pipe, 24-cold flow pipe, 25-expanding section, 26-straight section and 27-reducing section.
Detailed Description
In order to make the objects, technical solutions and advantages of the present invention more apparent, the present invention is further described in detail below with reference to examples and accompanying drawings, and the exemplary embodiments and descriptions thereof are only used for explaining the present invention and are not meant to limit the present invention.
Example 1
As shown in fig. 1, 3, 4 and 5, the present embodiment includes a tank 1 and an end cap 2 for closing the tank 1, a liquid collecting tank 9 is opened on the inner wall of the bottom of the tank 1 along the axis of the tank 1, guide rails 8 parallel to the axis of the tank 1 are respectively arranged at two ends of the liquid collecting tank 9, a chute 12 is opened on the upper surface of each guide rail 8, a plurality of suction holes 4 are opened on the inner wall of the top of the tank 1 along the axis of the tank, the suction holes 4 are communicated with a suction pipe 7 arranged on the outer wall of the tank 1, the present embodiment further includes a rectangular bracket formed by splicing two transverse plates 6 and two longitudinal plates 10, a clamping groove 11 is opened on the upper surface of each longitudinal plate 10, and a plurality of sliding blocks matched with the chute 12 are arranged in the middle of the lower surface of each transverse plate 6; be equipped with in jar body 1 wall along the axial of jar body 1 and be spiral helicine hot flow pipe 23 and be spiral helicine cold flow pipe 24, hot flow pipe 23 and cold flow pipe 24 mutual independence and crisscross distribution, two tip of hot flow pipe 23 run through jar body 1 back and heat source intercommunication, two tip of cold flow pipe 24 run through jar body 1 back and cold source intercommunication.
In the embodiment, the log is heated in a vacuum environment, and the steam in the tank body 1 is discharged in time, so that the wood in the tank body 1 is uniformly heated, the drying degrees of the wood in different placing positions are consistent, the positive correlation between the drying thermal efficiency of the wood and the drying cost is ensured, and the maximization of the drying thermal efficiency of the wood in the drying tank is realized; when the drying tank is used specifically, firstly, the drying tank is uncovered, then the rectangular bracket formed by the transverse plates 6 and the longitudinal plates 10 is pulled out along the guide rail 8, the upper surface of the longitudinal plates 10 is provided with a plurality of clamping grooves 11, two ends of the wood cut into plate shapes can be placed in the clamping grooves 11, the drying tank is different from the existing stacking mode when being placed, a plurality of wood materials can be built in the same way as building blocks, a plurality of vertically placed wood plates are clamped in the clamping grooves 11 to be used as a base layer, then a horizontally placed wood plate is laid on the base layer to be used as a connecting layer, and the like is done in sequence until the inner space of the tank body 1 is filled, namely, a certain gap is left between two adjacent plate-shaped wood materials, the heating component can fully diffuse the heat in the tank body 1 to each surface of each original wood plate when in work so as to improve the heat efficiency, and the wood materials are mutually, the excessive drying shrinkage and warping deformation can be avoided in the drying process;
after the timber is placed, pushing the bracket into the tank body 1, then sealing the cover, starting a vacuum pump communicated with the suction pipe 7 to enable the tank body 1 to be in a vacuum environment, and then connecting the heating assembly with high-frequency current to start a timber drying process; and in the drying process, the vacuum pump continuously works, the steam pressure is reduced because the wood is in a vacuum state, so that the moisture on the surface of the wood reaches a saturated state and is evaporated, the moisture is timely discharged and recovered by the vacuum pump, the moisture in the wood is continuously permeated, evaporated and discharged to the surface, the three processes are continuously carried out, and the purpose of drying the wood is achieved in a short time.
Furthermore, the wood in the tank body 1 is not contacted with the inner wall of the tank body 1 through the guide rail 8 and the bracket, so that the probability of overhigh local temperature of the wood in the drying process is reduced, and the quality of the dried wood is ensured; the high-frequency drying and the vacuum state are combined, the low boiling point of water in the vacuum state is mainly utilized, the wood can be dried at the low temperature, the drying tank is particularly suitable for drying the wood which has the cracking phenomenon at the high temperature such as hardwood or precious wood, the vacuum state is a negative pressure state, a certain water absorption effect is achieved, the drying tank is just similar to a high-frequency pressure gradient, the water discharge of the wood core is accelerated, a part of liquid water can be remained at the bottom of the tank body 1 in the drying process, and the phenomenon that the liquid water overflows when the cover of the drying tank is opened is avoided through the collection of the liquid collecting tank 9.
The wall of the tank body 1 is provided with a hot flow pipe 23, a heat medium is continuously injected through a heat source to heat the tank body 1, the hot flow pipe 23 is spiral, the tank body 1 can be wrapped in an all-around manner, and meanwhile, the interior of the tank body 1 can be uniformly heated, so that the maximization of the wood board drying efficiency is ensured; and because the drying of the wood boards is usually carried out in batches and continuously, the required drying temperature is different when the boards of different materials are dried, when the drying temperature required by the next batch of wood boards is lower than the drying temperature of the previous batch, the tank body 1 needs to be rapidly cooled to prevent the wood boards from being excessively dried, therefore, the applicant is provided with a spiral cold flow pipe 24 on the wall of the tank body 1, the cold flow pipe 24 and the hot flow pipe 23 are mutually independent and distributed in a staggered way, namely, when the different wood boards are replaced to carry out the drying process, the injection of the hot medium in the hot flow pipe 23 is suspended, the hot medium is injected into the cold flow pipe 24, a part of heat on the tank body 1 is rapidly taken away by the cold medium by utilizing the heat exchange principle, when the internal temperature of the tank body 1 meets the requirement of a low-temperature environment, the injection of the cold medium is stopped, and a proper amount of the hot medium is injected, the working hours consumed when different wood boards are dried in batches are shortened.
Example 2
As shown in fig. 1-5, this embodiment is followed the axial of the jar body 1 is equipped with spacing section of thick bamboo 16 on its top outer wall, is equipped with thermal-insulated base at jar body 1 upper surface, and cylinder 22 sets up jar body 1 top on thermal-insulated base, round pin 13 through universal ball with 2 inside walls of end cover are connected it has the through-hole to open on the top outer wall of the jar body 1, and round pin 13 activity runs through behind through-hole, the spacing section of thick bamboo 16 and is connected with the output of cylinder 22, and opens along the circumference of spacing section of thick bamboo 16 on its inner circumferential wall has radial groove 20, is equipped with on the outer circumferential wall of round pin 13 with radial groove 20 matched with fixture block 15, keeps away from at spacing section of thick bamboo 16 it has the movable groove i 19 with radial groove 20 intercommunication to open on the one end inner wall of end cover 2, just movable groove i 19 with. Further, the volume of the drying tank body is matched with the processing capacity of the drying tank, namely the larger the drying processing capacity is, the larger the volume is, and the drying time of the wood in the tank body 1 is greatly shortened by adopting a high-frequency vacuum combination mode, so that the uncovering and cover sealing frequency of the drying tank is higher, and the tank body 1 is heated, so that the opening and closing of the end cover 2 are usually assisted by external driving equipment, the driving equipment comprises a winch which is arranged on a heat insulation base on an air cylinder 22, the winch is arranged above the tank body 1 and is connected with the outer side wall of the end cover 2 through a traction rope, when the cover is opened and closed, the air cylinder 22 is started, the air cylinder 22 pushes the pin 13 to do linear motion in the limiting cylinder 16, namely, the output end of the air cylinder 22 pushes the pin 13 to move in the direction far away from the tank body 1 during the uncovering, so that the end cover 2 is separated from the tank body 1, and the output end of the air cylinder 22 drives the, so that the end cover 2 is contacted with the tank body 1;
before and after the wood drying process, the cover needs to be opened, namely the end cover 2 needs to rotate to maximize the area of the open end of the tank body 1, namely when the cover is opened, the air cylinder 22 is firstly started to push the pin 13 to move, meanwhile, the fixture block 15 is forced to enter the radial groove 20 along the movable groove I19, then the winch is started through starting the auxiliary driving device, so that the end cover 2 performs circular motion around the pin 13 until the open end of the tank body 1 is completely opened, meanwhile, the fixture block 15 cannot perform linear motion in the horizontal direction after entering the radial groove 20, further, the phenomenon that the end cover 2 generates excessive displacement to cause overlarge load of the pin 13 is avoided, and the use stability of the pin 13 is ensured.
Further, still be equipped with on the inner circumference wall of spacing section of thick bamboo 16 with the mutual symmetrical activity groove II 21 of activity groove I19 for under the prerequisite that does not use external auxiliary drive equipment, carrying out abluent in-process to jar body 1 and bracket, start the cylinder, can promote the end cover 2 level to the position far away from jar body 1, in order to make things convenient for pulling out of bracket and the clearance of collecting tank 9.
In this embodiment, the end portions of the ends, far away from the radial groove 20, of the movable grooves i 19 and ii 21 are respectively provided with a pressure sensor 17, the pressure sensors 17 are electrically connected with an external display, springs 18 are respectively arranged in the movable grooves i 19 and ii 21, one ends of the springs 18 are connected with the pressure sensors 17, and the other ends of the springs 18 are opposite to the radial groove 20. Furthermore, no matter the tank body 1 is dried or cleaned, the amount of movement of the pin 13 in the horizontal direction cannot be excessive, so that the applicant is provided with the pressure sensor 17 at one end part of each of the movable groove i 19 and the movable groove ii 21 far away from the radial groove 20, the movable groove i 19 and the movable groove ii 21 are provided with the spring 18, the fixture block 15 generates an extrusion force on the spring 18 when moving to the limit position in the movable groove i 19 and the movable groove ii 21, the extrusion force can be detected by the pressure sensor 17 and is transmitted to an external display for displaying, and a worker can timely judge whether the fixture block 15 is moved properly according to the initial value and the final detection value of the pressure sensor 17, so that the subsequent operation is facilitated, and the pin 13 is prevented from being damaged.
Preferably, the handle 3 is arranged to guide the movement of the end cap 2 when a worker opens or closes the end cap, and can prevent the end cap 2 from having a large amplitude of oscillation during use.
Example 3
As shown in fig. 2, in this embodiment, a plurality of abutting grooves 14 are formed on the end surface of the open end of the can body 1 along the circumferential direction, a rubber ring is arranged on the inner side wall of the end cover 2, and a plurality of rubber protrusions matched with the abutting grooves 14 are arranged on the rubber ring. Further, since the can body 1 is always in a sealed state during the drying process, and the end cap 2 is a movable part, the applicant provides a rubber ring on the inner side wall of the end cap 2, and provides a plurality of rubber protrusions on the inner side wall along the circumferential direction of the rubber ring, and provides a plurality of abutting grooves 14 matching with the rubber protrusions on the open end face of the can body 1, that is, during the capping, a plurality of different sealing cross sections can be formed between the can body 1 and the end cap 2 through the plurality of rubber protrusions and the rubber ring, so as to maintain the sealed environment inside the can body 1, and the rubber protrusions are restricted by the abutting grooves 14 when deformed by heat, and completely seal the abutting grooves 14, thereby improving the sealing performance of the can body 1.
Example 4
As shown in fig. 1, 6, and 7, in this embodiment, the plurality of suction holes 4 are uniformly distributed in two rows, and the two rows of suction holes 4 are located on the inner wall of the top of the tank body 1, the central angle corresponding to the arc length between the two rows of suction holes 4 is 40 ° to 70 °, and the distribution of the suction holes 4 enables the water vapor generated inside the tank body 1 to be quickly discharged outside, and at the same time, the excessive heat inside the tank body 1 is not pumped away. The suction hole 4 comprises a reduced section 27, a straight section 26 and an enlarged section 25 which are coaxial, the inner diameter of the reduced section 27 decreases progressively along the axis from the inside of the tank body 1 to the outside thereof, the small diameter end of the reduced section 27 is connected with one end of the straight section 26, the large diameter end of the reduced section 27 faces the inside of the tank body 2, the inner diameter of the enlarged section 25 increases progressively along the axis from the inside of the tank body 1 to the outside thereof, and the small diameter end of the enlarged section 25 is connected with the other end of the straight section 26.
In the embodiment, the arrangement of the suction hole 4 is not a conventional through hole shape, but is a special design made for the motion state of steam during the steam pumping inside the tank 1, because the moving speed of the steam is relatively high during the pumping of the vacuum pump, and at the same time, a large impact is formed on the inner walls of the suction hole 4 and the suction pipe 7, and because the tank 1 and the suction pipe 7 are made of metal, after the tank 1 or the suction pipe 7 is damaged by the impact, the high-temperature steam is easy to corrode the damaged part, and the service life of the tank 1 and the suction pipe 7 is rapidly reduced, therefore, the applicant divides the suction hole 4 into three parts, namely a reduced section 27, a straight section 26 and an enlarged section 25, and in the direction from the inside to the outside in the radial direction of the tank 1, the inner diameter of the reduced section 27 is gradually reduced, and the inner diameter of the enlarged section 25 is gradually increased, the inner diameter of the straight section 26 is kept unchanged, the steam enters the reduced section 27 after being drawn into the suction hole 4, the residence time of the steam in the tank body 1 cannot be too long in the drying process, therefore, when the steam moves from the inside of the tank body 1 to the inside of the reduced section 27, the flow cross section is reduced suddenly, the flow velocity of the steam is increased suddenly, the steam enters the enlarged section after the smooth transition of the straight section 26, the flow cross section of the steam is changed again, the small flow cross section is changed into the large flow cross section, the flow velocity of the steam is reduced at the moment, the steam is discharged outwards through the suction pipe 7 at the normal moving speed, the impact on the suction hole 4 and the suction pipe 7 is greatly reduced, the tank body 1 and the suction pipe 7 are prevented from being damaged or corroded by the steam, and the service life of the drying structure is prolonged.
Preferably, the axial length of the expanding section 25 is greater than that of the reducing section 27, so that the time of the speed attenuation of the steam in the flowing process is prolonged, the speed of the steam discharged outwards through the suction pipe 7 is within a reasonable value range, and the damage of the high-temperature steam to each circulation pipeline is reduced to the maximum extent on the premise of ensuring the steam discharge efficiency inside the tank body 1.
Example 5
As shown in fig. 1, in the present embodiment, a plurality of side plates 5 are disposed on an outer side wall of each of the transverse plates 6, and the side plates 5 are curved to form an arc shape. Further, set up a plurality of bendings and be curved curb plate 5 on the lateral wall of each horizontal board 6 for increase the stability of basic unit timber when timber is built, prevent that the timber of building when drying process or bracket remove from collapsing, ensure the drying efficiency of jar internal 1 timber, make things convenient for workman personnel to pick up timber fast after drying process simultaneously, provide workman's work efficiency.
The above-mentioned embodiments are intended to illustrate the objects, technical solutions and advantages of the present invention in further detail, and it should be understood that the above-mentioned embodiments are merely exemplary embodiments of the present invention, and are not intended to limit the scope of the present invention, and any modifications, equivalent substitutions, improvements and the like made within the spirit and principle of the present invention should be included in the scope of the present invention.
Claims (6)
1. The utility model provides a dry construction for reducing log plank moisture content, includes jar body (1) and is used for sealing end cover (2) of jar body (1), its characterized in that: the novel tank is characterized in that a liquid collecting groove (9) is formed in the inner wall of the bottom of the tank body (1) along the axis of the tank body (1), guide rails (8) parallel to the axis of the tank body (1) are respectively arranged at two ends of the liquid collecting groove (9), a sliding groove (12) is formed in the upper surface of each guide rail (8), a plurality of suction holes (4) are formed in the inner wall of the top of the tank body (1) along the axis of the tank body (1), the suction holes (4) are communicated with a suction pipe (7) arranged on the outer wall of the tank body (1), the novel tank further comprises a rectangular bracket formed by splicing two transverse plates (6) and two longitudinal plates (10), a clamping groove (11) is formed in the upper surface of each longitudinal plate (10), and a plurality of sliding blocks matched with the sliding grooves (12) are arranged in the middle of the lower surface; a spiral hot flow pipe (23) and a spiral cold flow pipe (24) are arranged in the wall of the tank body (1) along the axial direction of the tank body (1), the hot flow pipe (23) and the cold flow pipe (24) are mutually independent and distributed in a staggered manner, two ends of the hot flow pipe (23) penetrate through the tank body (1) and then are communicated with a heat source, and two ends of the cold flow pipe (24) penetrate through the tank body (1) and then are communicated with a cold source;
a limiting cylinder (16) is arranged on the outer wall of the top of the tank body (1) along the axial direction, the upper surface of the tank body (1) is provided with a heat insulation base, the cylinder (22) is arranged above the tank body on the heat insulation base, the pin column (13) is connected with the inner side wall of the end cover (2) through a universal ball, a through hole is arranged on the outer wall of the top part of the tank body (1), a pin column (13) movably penetrates through the through hole and the limiting cylinder (16) and then is connected with the output end of the air cylinder (22), and a radial groove (20) is arranged on the inner circumferential wall of the limiting cylinder (16) along the circumferential direction, a clamping block (15) matched with the radial groove (20) is arranged on the outer circumferential wall of the pin column (13), a movable groove I (19) communicated with the radial groove (20) is arranged on the inner wall of one end of the limiting cylinder (16) far away from the end cover (2), the movable groove I (19) is parallel to the axis of the limiting cylinder (16);
the inner wall of one end, close to the end cover (2), of the limiting cylinder (16) is provided with a movable groove II (21) communicated with the radial groove (20), and the movable groove II (21) and the movable groove I (19) are symmetrically distributed on two sides of the radial groove (20).
2. The drying structure for reducing the moisture content of a raw wood plank of claim 1, wherein: keep away from in activity groove I (19), activity groove II (21) the one end tip in radial groove (20) all is equipped with pressure sensor (17), and pressure sensor (17) are connected with external display electricity, and all are equipped with spring (18) in activity groove I (19) and activity groove II (21), and the one end and the pressure sensor (17) of spring (18) are connected, and the other end of spring (18) is just to radial groove (20).
3. The drying structure for reducing the moisture content of a raw wood plank of claim 1, wherein: along jar body (1) circumference is opened on its open end terminal surface has a plurality of butt joint grooves (14) be equipped with the rubber circle on the inside wall of end cover (2), and be equipped with on the rubber circle a plurality of with the rubber that butt joint groove (14) match is protruding.
4. The drying structure for reducing the moisture content of a raw wood plank of claim 1, wherein: in the axial direction of the tank body (1), the plurality of suction holes (4) are distributed in two rows, and the central angle corresponding to the arc length between the two rows of suction holes (4) is 40-70 degrees.
5. The drying structure for reducing the moisture content of a raw wood plank as claimed in claim 4, wherein: the suction hole (4) comprises a coaxial reduced section (27), a straight section (26) and an enlarged section (25), the inner diameter of the reduced section (27) decreases progressively along the axis from the inside of the tank body (1) to the outside of the tank body, the small diameter end of the reduced section (27) is connected with one end of the straight section (26), the large diameter end of the reduced section (27) faces the inside of the tank body (1), the inner diameter of the enlarged section (25) increases progressively along the axis from the inside of the tank body (1) to the outside of the tank body, and the small diameter end of the enlarged section (25) is connected with the other end of the straight section (26).
6. The drying structure for reducing the moisture content of a raw wood plank of claim 5, wherein: the axial length of the expanding section (25) is smaller than the axial length of the reducing section (27).
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| Application Number | Priority Date | Filing Date | Title |
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| CN201810400672.XA CN108592538B (en) | 2018-04-28 | 2018-04-28 | A drying structure for reducing log plank moisture content |
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| CN201810400672.XA CN108592538B (en) | 2018-04-28 | 2018-04-28 | A drying structure for reducing log plank moisture content |
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| CN108592538B true CN108592538B (en) | 2020-11-06 |
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| Publication number | Priority date | Publication date | Assignee | Title |
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| CN113232109A (en) * | 2021-01-14 | 2021-08-10 | 刘国旗 | Novel log compression drying-machine |
| CN113819722B (en) * | 2021-09-01 | 2022-08-16 | 杭州临安南洋木工机械有限公司 | Wood drying equipment |
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| US4194296A (en) * | 1977-05-17 | 1980-03-25 | Pagnozzi Ernesto Guglielmo | Vacuum drying kiln |
| WO2006006837A1 (en) * | 2004-07-15 | 2006-01-19 | Gordijs, Jevgenijs | Method for drying sawn timber and a drier for carrying out said method |
| CN102605314A (en) * | 2012-03-15 | 2012-07-25 | 宁波东方加热设备有限公司 | Blackening furnace |
| CN103542696A (en) * | 2013-09-25 | 2014-01-29 | 开原圣意达木材干燥设备有限公司 | Wood vacuum drying-carbonization integrated kiln |
| CN203534073U (en) * | 2013-11-09 | 2014-04-09 | 潍坊富顺节能科技有限公司 | Rosewood vacuum drier |
| CN207096018U (en) * | 2017-07-20 | 2018-03-13 | 苏州新标检测技术有限公司 | A kind of glow wire test's machine |
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2018
- 2018-04-28 CN CN201810400672.XA patent/CN108592538B/en not_active Expired - Fee Related
Patent Citations (6)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| US4194296A (en) * | 1977-05-17 | 1980-03-25 | Pagnozzi Ernesto Guglielmo | Vacuum drying kiln |
| WO2006006837A1 (en) * | 2004-07-15 | 2006-01-19 | Gordijs, Jevgenijs | Method for drying sawn timber and a drier for carrying out said method |
| CN102605314A (en) * | 2012-03-15 | 2012-07-25 | 宁波东方加热设备有限公司 | Blackening furnace |
| CN103542696A (en) * | 2013-09-25 | 2014-01-29 | 开原圣意达木材干燥设备有限公司 | Wood vacuum drying-carbonization integrated kiln |
| CN203534073U (en) * | 2013-11-09 | 2014-04-09 | 潍坊富顺节能科技有限公司 | Rosewood vacuum drier |
| CN207096018U (en) * | 2017-07-20 | 2018-03-13 | 苏州新标检测技术有限公司 | A kind of glow wire test's machine |
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| CN108592538A (en) | 2018-09-28 |
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