JP5453021B2 - Conveyor chain equipment - Google Patents

Description

  The present invention relates to a conveyor chain facility for an in-line heat treatment facility in which a metal material in an austenite state is conveyed and cooled by being immersed in a molten salt at 400 ° C to 600 ° C.

  Conventionally, when producing a medium / high carbon steel wire rod, the wire rod is hot-rolled for the purpose of imparting strength to the wire rod, and then reheated to an austenite state or austenite state as it is. There is known a heat treatment technique called patenting in which a material is rapidly cooled to a temperature of around 0 ° C. and transformed into fine pearlite. In particular, the direct heat treatment technique in which the above-described patenting is directly performed in-line following the rolling line so as to utilize the sensible heat of the loose coil immediately after being hot-rolled is called direct patenting.

  Patent Document 1 and Patent Document 2 disclose an in-line heat treatment facility that can be applied to a production line for manufacturing a medium / high carbon steel wire by performing such direct patenting.

  In the case of performing direct patenting using the inline heat treatment equipment described in Patent Documents 1 and 2, the austenite wire is made into a loose coil in a continuous non-concentric ring state in the rolling line, and then this loose coil is used. The heat treatment can be performed by transporting it in the cooling tank filled with the molten salt downstream of the rolling line. Here, a large number of piece type rollers are arranged in parallel as a means for conveying the loose coil.

  Patent Document 3 discloses a method in which a large number of flat rollers are arranged in parallel for conveying a loose coil in a molten salt.

JP 59-31875 A Japanese Utility Model Publication No. 61-147255 JP 2007-239069 A

  However, since the top roller and flat roller are sequentially transported while rotating with the loose coil placed on the upper surface, slip (friction) occurs with the loose coil, making the transport unstable. And there is a problem of damaging the loose coil.

  Therefore, the present inventor has examined the use of a conveyor chain for conveying the loose coil in the molten salt. According to the conveyor chain, the conveyor chain itself moves and conveys with the loose coil placed on the upper surface thereof, so there is no friction with the loose coil, the conveyance is stable, and the loose coil is There is no risk of injury.

  As described above, the use of the conveyor chain has improved the instability of conveyance, which is a drawback of the top roller and the flat roller, and the problem of scratching the loose coil. However, the present inventor has found that when a conveyor chain is used, a further problem occurs during the maintenance of the conveyor chain.

  That is, in the present invention, since a high-temperature molten salt is used, it is very difficult to maintain the conveyor chain impregnated in the molten salt during maintenance. Therefore, it is necessary to expose the conveyor chain on the liquid surface of the molten salt during maintenance. In the molten salt bath, the temperature of the molten salt is normally maintained at 400 to 600 ° C., but the melting point of a general molten salt is 150 to 300 ° C. When cooled to a temperature below the melting point, Solidifies. Of course, the molten salt adhering to the conveyor chain also solidifies when it is cooled below the melting point by exposure to the atmosphere.

  The molten salt adhering to the surface of the conveyor chain quickly falls due to gravity and is sufficiently removed from the conveyor chain. The salt is not removed or takes time to remove, and is cooled to below the melting point and solidified before it is sufficiently removed.

  When the molten salt adhering to the conveyor chain equipment is cooled and solidified, it is difficult to remove the solidified salt, which makes maintenance difficult. Furthermore, even if this conveyor chain equipment is impregnated with molten salt again, it is not easy to melt the solidified salt again. In particular, when the molten salt that has entered the gap in the sliding portion is solidified, the mobility of the sliding portion is reduced, which hinders operation. Furthermore, in the process where the solidified salt is melted again, the salt may expand in volume, and the conveyor chain equipment may be damaged.

  The present inventors diligently studied how to discharge the molten salt in the conveyor chain facility exposed on the surface of the molten salt during maintenance.

  Then, this invention makes it a subject to provide the conveyor chain installation which can discharge | emit molten salt quickly and fully in the conveyor chain installation exposed on the liquid level of the molten salt at the time of a maintenance.

  Other problems of the present invention will become apparent from the following description.

  The above problems are solved by the following inventions.

(Claim 1)
The links composed of a pair of link plates are connected in the length direction by a link connecting portion formed by a bush and a pin inserted rotatably in the bush,
A conveyor chain that cools by dipping in a molten salt of 400 ° C to 600 ° C while placing and transporting an austenitic metal material,
Forming a molten salt entry / exit gap between the bush and the pin, and the gap is in fluid communication with the outside;
The molten salt entry / exit gap is in liquid communication with the outside via a liquid drainage channel,
In the link connecting portion, one link fixed with the bush is connected to the other link arranged to overlap the outside of the one link while fixing the pin,
The end surface of the bush is protruded from the outer surface of the link plate of the one link to secure a gap in fluid communication with the outside between the one link and the other link. The both end surfaces of each contact the outer link plate,
The drainage flow path fluidly communicates the gap between the bush and the pin and the gap between the one link and the other link by the unevenness provided on the end surface of the bush. Conveyor chain equipment characterized by being formed

(Claim 2 )
The links composed of a pair of link plates are connected in the length direction by a link connecting portion formed by a bush and a pin inserted rotatably in the bush,
A conveyor chain that cools by dipping in a molten salt of 400 ° C to 600 ° C while placing and transporting an austenitic metal material,
Forming a molten salt entry / exit gap between the bush and the pin, and the gap is in fluid communication with the outside;
The molten salt entry / exit gap is in liquid communication with the outside via a liquid drainage channel,
In the link connecting portion, one link fixed with the bush is connected to the other link arranged to overlap the outside of the one link while fixing the pin,
The end surface of the bush is protruded from the outer surface of the link plate of the one link to secure a gap in fluid communication with the outside between the one link and the other link. A gap is formed between the end face of the outer link plate and the outer link plate,
The drainage flow path is configured such that a gap between the bush and the pin and a gap between the one link and the other link are separated by a gap between the end surface of the bush and the outer link plate. to features and to Turkey Nbeyachen equipment to be formed in communication.

(Claim 3 )
The conveyor chain equipment according to claim 2, wherein an end surface of the bush has irregularities.

(Claim 4 )
The links composed of a pair of link plates are connected in the length direction by a link connecting portion formed by a bush and a pin inserted rotatably in the bush,
A conveyor chain that cools by dipping in a molten salt of 400 ° C to 600 ° C while placing and transporting an austenitic metal material,
Forming a molten salt entry / exit gap between the bush and the pin, and the gap is in fluid communication with the outside;
The molten salt entry / exit gap is in liquid communication with the outside via a liquid drainage channel,
In the link connecting portion, one link fixed with the bush is connected to the other link arranged to overlap the outside of the one link while fixing the pin,
Without projecting the end surface of the bush from the outer surface of the link plate of the one link, and forming a gap in fluid communication with the outside between the one link and the other link;
The liquid withdrawing channel, the gap a, the gap between the one link and the other link and being formed in fluid communication to communicate to Turkey between said bushing and said pin Nbeya chain equipment.

(Claim 5 )
A second drainage flow path is formed by fluidly communicating the gap between the bush and the pin and the outside by one or more communication holes communicating with the outside bored in the bush. The conveyor chain facility according to any one of claims 1 to 4 , wherein the conveyor chain facility is provided.

(Claim 6 )
The links composed of a pair of link plates are connected in the length direction by a link connecting portion formed by a bush and a pin inserted rotatably in the bush,
A conveyor chain that cools by dipping in a molten salt of 400 ° C to 600 ° C while placing and transporting an austenitic metal material,
Forming a molten salt entry / exit gap between the bush and the pin, and the gap is in fluid communication with the outside;
The molten salt entry / exit gap is in liquid communication with the outside via a liquid drainage channel,
In the link connecting portion, one link fixed with the bush is connected to the other link arranged to overlap the outside of the one link while fixing the pin,
Do not project the end face of the bush from the outer surface of the link plate of the one link, and do not form a gap in fluid communication with the outside between the one link and the other link,
The liquid drainage channel is formed by fluidly communicating the gap between the bush and the pin and the outside through one or more communication holes that communicate with the outside bored in the bush. features and to Turkey Nbeyachen equipment that.

(Claim 7 )
The conveyor chain equipment according to any one of claims 1 to 6 , further comprising elevating means for elevating and lowering the conveyor chain so as to be exposed on the liquid surface of the molten salt.

  According to the present invention, it is possible to provide a conveyor chain that can quickly and sufficiently discharge the molten salt in the conveyor chain exposed on the surface of the molten salt during maintenance.

The principal part schematic plan view which shows an example of the conveyor chain which concerns on this invention Side view of FIG. The partial expanded sectional view of the link connection part in the conveyor chain which concerns on this invention The principal part expanded sectional view which shows the 1st aspect of a draining flow path Side and sectional views showing a state in which four grooves are provided in the outer peripheral direction from the center of the bush diameter on the end face of the bush Side and sectional views showing a state in which six grooves are provided on the end face of the bush in the outer circumferential direction from the center of the bush diameter. The principal part expanded sectional view which shows the 2nd aspect of a draining flow path The principal part expanded sectional view which shows the 3rd aspect of a draining flow path Side and cross-sectional view showing a state in which two communication holes are provided near the center of the bush in the longitudinal direction of the bush The side view which shows an example of the molten salt tank in the in-line heat processing equipment provided with the conveyor chain which concerns on this invention The figure which shows the state which the conveyor chain engaged with the guide rail

  FIG. 1 is a schematic plan view of an essential part showing an example of a conveyor chain according to the present invention, FIG. 2 is a side view of FIG. 1, and FIG. 3 is a partially enlarged sectional view of a link connecting portion in the conveyor chain.

  Conveyor chain 1 forms the outer link 2 by connecting both ends of a pair of metal outer link plates 3, 3 arranged in parallel at intervals with metal pins 4, 4, A pair of metal inner link plates 6, 6 arranged in parallel with a slightly narrower interval than the outer link plates 3, 3 are connected to each other by metal bushes 7, 7 to form an inner link. 5 is formed. The outer link 2 and the inner link 5 are connected by pins 4 and 4 and bushings 7 and 7 constituting a link connecting portion. That is, the outer link 2 and the inner link 5 are connected by rotatably inserting the pins 4 and 4 that connect both end sides of the outer link plates 3 and 3 into the bushes 7 and 7 in the inner link 5. Then, the outer link 2 and the inner link 5 are alternately connected in the length direction to form a continuous endless shape.

  Both ends of the pin 4 protrude to the outer sides of the outer link 2 to form protrusions 4a, and metal side rollers 8 are rotatably provided on the protrusions 4a. Reference numeral 12 denotes a metal center roller that is rotatably provided on the outer periphery of the bush 7 and engages with the sprocket.

  The upper end surface 2a of the outer link 2 and the upper end surface 5a of the inner link 5 are higher than the height position of the upper end of each side roller 8 in a state where the conveyor chain 1 extends in a straight line as shown in FIG. Both are protruding and formed to have the same height (FIG. 11), and the upper end surface 2a of the outer link 2 and the upper end surface 5a of the inner link 5 are used as the mounting surface of the loose coil W. The loose coil W is placed on the upper end surfaces 2a and 5a and conveyed.

  In the conventional conveyor chain, the average gap between the bush and the pin is set to be less than about 0.4 mm so that only the gap necessary for sliding is formed between the bush and the pin (this specification). In the text, the average gap refers to the gap between the inner surface of the bush and the outer surface of the pin when the central axes of the bush and the pin are aligned.) When such a conventional conveyor chain is used as a conveyor chain immersed in a molten salt at 400 ° C. to 600 ° C., the molten salt is exposed to the gap when exposed from the liquid surface of the molten salt during maintenance. Cause problems that remain. On the other hand, the conveyor chain of the present invention forms a molten salt inlet / outlet gap C47 between the bush 7 and the pin 4 and makes the molten salt inlet / outlet gap C47 in liquid communication with the outside. The molten salt that has entered between the bush and the pin can be quickly and sufficiently discharged, thereby solving the problem.

  The molten salt inlet / outlet gap C47 is a gap through which the molten salt is quickly and sufficiently discharged from the molten salt inlet / outlet gap C47. Preferably, the average of the gap between the bush 7 and the pin 4 is 0.6. It is formed by setting it to -0.8 mm.

  The gap formed in this way corresponds to about 1.5 to 2.0 times the gap in a conventional conveyor chain.

  A person skilled in the art would think that setting a large gap between the bush and the pin results in more melting salt being taken in, and the above-described problems due to consolidation during maintenance or the like are further expanded. Nevertheless, the reason why the present invention sets a larger gap than the conventional conveyor chain will be described in detail below.

  That is, the present inventor paid attention to the behavior of the liquid in the gap between the bush and the pin, and found that the capillary action works strongly in the gap, and completed the present invention.

  When the average value of the gap between the bush and the pin is less than about 0.4 mm as in the conventional conveyor chain, the gap formed between the bush and the pin becomes narrow, so that the capillary phenomenon works greatly. The molten salt that has entered the gap becomes difficult to be discharged.

  Alternatively, when the gap between the bush and the pin is completely eliminated, the molten salt is not taken into the gap, but this is not practical because the pin and the bush cannot slide with respect to each other.

  On the other hand, if the average gap between the bush and the pin exceeds 0.8 mm, backlash occurs between the bush and the pin during operation, and conveyance is unstable and dangerous.

  In the present invention, the molten salt entering / exiting gap C47 described above is in fluid communication with the outside, so that the molten salt that has entered between the bush 7 and the pin 4 is transferred from the molten salt entering / exiting gap C47 to the outside. It is configured to be discharged quickly and sufficiently.

  The outside is the outside of the gap formed by the conveyor chain. Examples of the gap include a gap formed by the end face of the bush and the inner link plate, a gap formed by the inner link plate and the outer link plate, and the like. It is done.

  In this invention, it is preferable to comprise so that the said fusion | melting salt in / out space | interval may be connected with the exterior liquidly through a liquid drainage flow path.

  The liquid drainage channel in the present invention will be exemplified below with reference to the drawings.

  FIG. 4 is an enlarged cross-sectional view of a main part showing a first aspect of the liquid drainage channel.

  In FIG. 4, reference numeral 1 a denotes a link connecting portion. In the link connecting portion 1 a, the inner link 5 to which the bush 7 is fixed and the pin 4 are fixed and the outer link arranged so as to overlap the outer side of the inner link 5. Link 2 is connected.

  Further, the end surface 7a of the bush 7 protrudes from the outer surface of the inner link plate 6 to secure a gap C36 that is in fluid communication with the outside between the inner link plate 6 and the outer link plate 3. In addition, both end surfaces 7a of the bush 7 are configured to contact the outer link plates 3 and 3, respectively.

  The liquid drainage flow path includes a molten salt inlet / outlet gap C47 between the bush 7 and the pin 4, and a gap C36 between the inner link plate 6 and the outer link plate 3, and the bush 7 It is formed in fluid communication by unevenness provided on the end surface 7a.

  The protruding width of the end surface 7a of the bush 7 is preferably 0.5 mm or more. By providing such a protruding width, it is possible to preferably ensure a gap C36 that is in fluid communication with the outside between the inner link plate 6 and the outer link plate 3.

  The example of the unevenness | corrugation provided in the end surface 7a of the said bush 7 is demonstrated using FIG.5 and FIG.6.

  First, FIG. 5 is a side view and a sectional view showing a state in which four grooves 7b are provided on the end surface 7a of the bush 7 in the outer peripheral direction from the center of the bush diameter, and FIG. 6 is similarly provided with six grooves 7b. It is the side surface and sectional view which show the state.

  In this way, by providing one or two or more grooves 7b on the end surface 7a of the bush 7 in the outer circumferential direction from the center of the bush diameter, the molten salt entry / exit gap C47 between the bush 7 and the pin 4; The gap C36 between the inner link plate 6 and the outer link plate 3 is in fluid communication by a groove 7b provided in the end surface 7a of the bush 7, and the molten salt is discharged quickly and sufficiently. It becomes like this. In particular, when a plurality of grooves 7b are provided, the effect that air is easily taken into the molten salt inlet / outlet gap C47 between the bush 7 and the pin 4 through the grooves 7b is increased, and the discharge of the molten salt is further promoted. .

  The same effect can be obtained by providing one or two or more protrusions on the end surface 7a of the bush 7 so that the tips of the protrusions are in contact with the outer link plate 3 instead of providing the grooves. can get.

  In addition, when the configuration in which the end surface 7a of the bush 7 is in contact with the outer link plate 3 is used, the position of the bush 4 with respect to the longitudinal direction of the pin 4 is fixed, so the connecting portion between the inner link 5 and the outer link 2 The effect which prevents the rattling in the is obtained.

  In the above-described configuration in which the end surface 7a of the bush 7 protrudes from the outer surface of the inner link plates 6, 6, instead of providing irregularities on the end surface 7a of the bush 7, the end surface of the bush 7 is as follows. The liquid drainage channel may be formed by forming a gap C37 between 7a and the outer link plate 3.

  FIG. 7 is an enlarged cross-sectional view of a main part showing a second aspect of the liquid drainage channel.

  The drainage flow path includes a molten salt inlet / outlet gap C47 between the bush 7 and the pin 4, and a gap C36 between the inner link plate 6 and the outer link plate 3, and an end face of the bush 7. It is formed in fluid communication with a gap C37 between 7a and the outer link plate 3.

  The gap C37 between the end surface 7a of the bush 7 and the outer link plate 3 is preferably set so that the width between the outer link plates 3 and 3 is less than the width between both end surfaces 7a and 7a of the bush 7. It is formed by setting larger than 8 mm, more preferably larger than 1.0 mm. For example, when the above value is 0.8 mm, when the bush 7 is arranged at the center of the pin 4 or when it is unevenly distributed in the longitudinal direction of the pin 4, the end surface 7a of the bush 7 and the outer link plate A gap of at least 0.4 mm is formed between the two and liquid communication.

  Moreover, you may provide the unevenness | corrugation mentioned above in the end surface 7a of the said bush 7 comprised in this way.

  FIG. 8 is an enlarged cross-sectional view of a main part showing a third aspect of the liquid drainage channel.

  Here, the end surface 7a of the bush 7 is not protruded from the outer surface of the link plate 6 of the inner link 5, and is in fluid communication with the outside between the inner link plate 6 and the outer link plate 3. A gap C36 is formed, and the liquid drainage flow path includes a molten salt inlet / outlet gap C47 between the bush 7 and the pin 4, and a gap C36 between the inner link plate 6 and the outer link plate 3. Adjacent to each other and formed in fluid communication.

  In this case, the gap C36 between the inner link plate 6 and the outer link plate 3 is such that the width between the outer link plates 3 and 3 is larger than the width between the outer surfaces of the inner link plates 6 and 6. Preferably, it is formed by setting it to be larger than 0.8 mm, more preferably larger than 1.0 mm. When the above value is 0.8 mm, when the inner link 5 is arranged at the center between the outer link plates 3, 3, the case where the inner link 5 is unevenly distributed on either side of the outer link plates 3, 3 A gap of at least 0.4 mm is formed between the inner link plate 6 and the outer link plate 3 to enable fluid communication.

  In the present invention, two or more liquid drainage channels may be provided for one molten salt inlet / outlet gap C47.

  First, since the link connection part of a conveyor chain is comprised right-and-left symmetrically with respect to the length direction of a conveyor chain, the liquid drainage channel illustrated above can be formed in both right and left.

  Furthermore, the liquid drainage flow path in the present invention is not limited to the liquid drainage flow path that passes through the gap C36 between the inner link plate 6 and the outer link plate 3 described above, but between the bush 7 and the pin 4. The molten salt inlet / outlet gap C47 and the outside may be formed in fluid communication with one or more communication holes 7c communicating with the outside formed in the bush 7 described in detail below.

  FIG. 9 is a side view and a cross-sectional view showing a state in which two communication holes are provided near the center of the bush in the longitudinal direction of the bush.

  The drainage flow path formed by such a communication hole 7c does not protrude the end surface of the bush 7 from the outer surface of the inner link plate 6, or the inner link plate 6 and the outer link plate 3 Even when the gap C36 that is in fluid communication with the outside cannot be formed therebetween, it is possible to form it.

  In the case where the above-described center roller 12 is used, for example, a gap between the center roller 12 and the bush 7 is set to prevent the center roller 12 from blocking the communication hole 7c. It is preferable to perform a treatment such as setting in the same manner as the entry / exit gap C47.

  The liquid drainage channel formed by the communication hole 7c is used as the second liquid drainage channel together with the liquid drainage channel passing through the gap C36 between the inner link plate 6 and the outer link plate 3 described above. May be.

  When the drainage flow path by the communication hole 7c is used in combination with the drainage flow path passing through the gap C36 between the inner link plate 6 and the outer link plate 3, the molten salt between the bush 7 and the pin 4 is used. The effect that the air is easily taken into the entry / exit gap C47 is also increased, and the molten salt is discharged more quickly and sufficiently synergistically.

  In each aspect described above, one or more longitudinal grooves may be formed in the pin 4. Thereby, the flow path for the molten salt that has entered the molten salt entry / exit gap C47 between the bush 7 and the pin 4 to the end surface 7a of the bush 7 is preferably formed.

  Next, an example of an in-line heat treatment facility provided with the chain 1 according to the present invention will be described with reference to FIG.

  In the figure, 100 is a molten salt tank for storing a molten salt 101. The molten salt 101 is composed of one or a combination of two or more selected from nitric acid or an alkali metal salt of nitrous acid, and is preferably composed of at least one of sodium nitrite, sodium nitrate, and potassium nitrate. More preferably, it consists of a composition of sodium nitrate: potassium nitrate = 30-60: 70-40 (weight ratio).

  Moreover, the temperature of the molten salt 101 in the molten salt tank 100 is in the range of 400 ° C to 600 ° C.

  The conveyor chain 1 according to the present invention is stretched over a pair of sprockets 20 and 21 disposed at a predetermined distance on the liquid surface of the molten salt 101 in the molten salt tank 100. Then, a set of conveyor chains 1 stretched between the pair of sprockets 20 and 21 are arranged in parallel in a plurality in the molten salt bath 100 to be conveyed to the molten salt 101 in the in-line heat treatment equipment. Equipment is configured.

  Between the sprockets 20, 21, it gradually inclines downward from the vicinity of the sprocket 20 disposed on the entry side of the loose coil W toward the molten salt 101, and passes through the molten salt 101 toward the exit side. The guide rails 30 and 31 are formed so as to gradually incline upward and form a conveying line of the conveyor chain 1 over the sprocket 21 arranged on the outlet side. The guide rail 30 is a rail on the conveyance side of the loose coil W disposed above the molten salt bath 100, and the guide rail 31 is a rail on the return side of the conveyor chain 1 disposed below.

  FIG. 11 is a cross-sectional view of the state in which the conveyor chain 1 is engaged with the guide rail 30 as viewed from the conveyance direction side of the conveyor chain 1.

  Two guide rails 30 and 31 are provided for each conveyor chain 1. Each of the guide rails 30 has a U-shaped cross section, and each U-shaped portion is arranged so as to face the inside, and side rollers 8 that protrude from both sides of the conveyor chain 1 are engaged in the U-shaped portion. The movement of the conveyor chain 1 accompanying the rotation of the sprockets 20 and 21 is guided from both sides while rotating the side rollers 8.

  On the upstream side of the molten salt bath 100, the loose coil W is mounted on the outer link 2 of the conveyor chain 1 and the upper end surfaces 2a and 5a of the inner link 5 from a rolling line (not shown) in a continuous non-concentric ring state. And is immersed in the molten salt 101 of the molten salt bath 100 while being conveyed along with the movement of the conveyor chain 1 by the rotation of the sprockets 20 and 21.

  By having the above-described configuration, the conveyor chain of the present invention can quickly and sufficiently discharge the molten salt when it is exposed on the surface of the molten salt during maintenance.

  The exposure of the conveyor chain onto the molten salt liquid surface allows the entire conveyor chain equipment including the pair of sprockets 20 and 21 and the guide rails 30 and 31 to be moved up and down with respect to the molten salt tank 100 by lifting means such as a jack. It is preferable to configure. Thereby, at the time of a maintenance etc., the conveyor chain 1 can be raised quickly and can be exposed on the liquid surface of the molten salt 101, and workability | operativity can be improved.

  Moreover, it is preferable that the said raising / lowering means is comprised so that an inclination can be provided to the conveyor chain exposed on the liquid level of molten salt so that the said bush may incline in a longitudinal direction. Due to this inclination, it is possible to generate a liquid flow with respect to the molten salt that has entered the molten salt inlet / outlet gap C47 between the bush 7 and the pin 4 to facilitate discharge. Moreover, the effect of dropping the molten salt adhering to the surface of the conveyor chain is also obtained.

  Further, the elevating means may be configured to vibrate the conveyor chain exposed on the surface of the molten salt. Thereby, the same effect as the case where the inclination mentioned above is given is acquired.

  In FIG. 10, reference numeral 200 denotes a canopy covering the upper part of the molten salt bath 100 so that the space above the molten salt 101 can be maintained at a predetermined high temperature.

  This prevents the molten salt adhering to the conveyor chain 1 from being cooled and solidified when the conveyor chain 1 is exposed on the liquid surface of the molten salt 101 at the sprockets 20 and 21 during driving.

  It is preferable that the canopy 200 can be lifted and lowered together with the conveyor chain 1 by the lifting means described above. This configuration has an effect of delaying the time until the molten salt is cooled to the melting point or lower when the conveyor chain 1 is exposed on the liquid surface of the molten salt 101 during maintenance or the like. It is preferable to discharge the molten salt that has entered the molten salt inlet / outlet gap C47 between the pin 4 and the pin 4.

  In the above embodiment, the conveyor chain 1 is formed by alternately connecting the outer links 2 and the inner links 5. However, according to the present invention, a large number of links may be connected by the link connecting portions. The links may not necessarily be divided into the outer link 2 and the inner link 5. For example, each link is formed in the same structure in which one end side is an outer link and the other end side is an inner link, and the links are connected to each other on the outer link on one end side of one link and on the outside of the inner link on the other end side of the other link. The conveyor chain may be configured by sequentially connecting to each other.

  Further, the present invention is not necessarily limited to the conveyance of loose coils, and can be widely applied as long as it conveys an austenitic metal material that is immersed in a molten salt at 400 ° C. to 600 ° C. for cooling.

  In addition, the present invention is not limited to this, and the present invention can be applied to any chain that is required to be quickly and sufficiently discharged when exposed to the liquid surface.

  For example, the present invention can be applied to any chain as long as a chain having a property of solidifying at room temperature is melted at a temperature other than room temperature and immersed in the melted material.

  For example, when the chain to which the present invention is applied is sequentially immersed in two different types of liquids (liquid A and liquid B), after being immersed in the liquid A, when exposed on the liquid A liquid surface Since the liquid A is quickly and sufficiently discharged from the chain, the effect of preventing the liquid A from being mixed into the liquid B even when the chain is immersed in the liquid B can be obtained.

  The structure of the molten salt inlet / outlet gap and the liquid drainage passage described above is applied not only to the gap between the bush and the pin, but also to the gap between the rotating shaft and the bearing at other rotational sliding parts in the conveyor chain. Also good.

1: Conveyor chain 1a: Link connecting portion 2: Outer link 2a: Upper end surface 3: Outer link plate 3a: Arc surface 4: Pin 4a: Protruding portion 5: Inner link 5a: Upper end surface 6: Inner link plate 6a: Outer surface 7: Bush 7a: End surface 7b: Groove 7c: Hole 8: Side roller 12: Center roller 100: Molten salt tank 101: Molten salt 20, 21: Sprocket 30, 31: Guide rail 200: Canopy C36, C37, C47: Gap W: Loose coil

Claims (7)

The links composed of a pair of link plates are connected in the length direction by a link connecting portion formed by a bush and a pin inserted rotatably in the bush,
A conveyor chain that cools by dipping in a molten salt of 400 ° C to 600 ° C while placing and transporting an austenitic metal material,
Forming a molten salt entry / exit gap between the bush and the pin, and the gap is in fluid communication with the outside;
The molten salt entry / exit gap is in liquid communication with the outside via a liquid drainage channel,
In the link connecting portion, one link fixed with the bush is connected to the other link arranged to overlap the outside of the one link while fixing the pin,
The end surface of the bush is protruded from the outer surface of the link plate of the one link to secure a gap in fluid communication with the outside between the one link and the other link. The both end surfaces of each contact the outer link plate,
The drainage flow path fluidly communicates the gap between the bush and the pin and the gap between the one link and the other link by the unevenness provided on the end surface of the bush. Conveyor chain equipment characterized by being formed by The links composed of a pair of link plates are connected in the length direction by a link connecting portion formed by a bush and a pin inserted rotatably in the bush,
A conveyor chain that cools by dipping in a molten salt of 400 ° C to 600 ° C while placing and transporting an austenitic metal material,
Forming a molten salt entry / exit gap between the bush and the pin, and the gap is in fluid communication with the outside;
The molten salt entry / exit gap is in liquid communication with the outside via a liquid drainage channel,
In the link connecting portion, one link fixed with the bush is connected to the other link arranged to overlap the outside of the one link while fixing the pin,
The end surface of the bush is protruded from the outer surface of the link plate of the one link to secure a gap in fluid communication with the outside between the one link and the other link. A gap is formed between the end face of the outer link plate and the outer link plate,
The drainage flow path is configured such that a gap between the bush and the pin and a gap between the one link and the other link are separated by a gap between the end surface of the bush and the outer link plate. to features and to Turkey Nbeyachen equipment to be formed in communication. The conveyor chain equipment according to claim 2, wherein an end surface of the bush has irregularities. The links composed of a pair of link plates are connected in the length direction by a link connecting portion formed by a bush and a pin inserted rotatably in the bush,
A conveyor chain that cools by dipping in a molten salt of 400 ° C to 600 ° C while placing and transporting an austenitic metal material,
Forming a molten salt entry / exit gap between the bush and the pin, and the gap is in fluid communication with the outside;
The molten salt entry / exit gap is in liquid communication with the outside via a liquid drainage channel,
In the link connecting portion, one link fixed with the bush is connected to the other link arranged to overlap the outside of the one link while fixing the pin,
Without projecting the end surface of the bush from the outer surface of the link plate of the one link, and forming a gap in fluid communication with the outside between the one link and the other link;
The liquid withdrawing channel, the gap a, the gap between the one link and the other link and being formed in fluid communication to communicate to Turkey between said bushing and said pin Nbeya chain equipment. A second drainage flow path is formed by fluidly communicating the gap between the bush and the pin and the outside by one or more communication holes communicating with the outside bored in the bush. The conveyor chain facility according to any one of claims 1 to 4 , wherein the conveyor chain facility is provided. The links composed of a pair of link plates are connected in the length direction by a link connecting portion formed by a bush and a pin inserted rotatably in the bush,
A conveyor chain that cools by dipping in a molten salt of 400 ° C to 600 ° C while placing and transporting an austenitic metal material,
Forming a molten salt entry / exit gap between the bush and the pin, and the gap is in fluid communication with the outside;
The molten salt entry / exit gap is in liquid communication with the outside via a liquid drainage channel,
In the link connecting portion, one link fixed with the bush is connected to the other link arranged to overlap the outside of the one link while fixing the pin,
Do not project the end face of the bush from the outer surface of the link plate of the one link, and do not form a gap in fluid communication with the outside between the one link and the other link,
The liquid drainage channel is formed by fluidly communicating the gap between the bush and the pin and the outside through one or more communication holes that communicate with the outside bored in the bush. features and to Turkey Nbeyachen equipment that. The conveyor chain equipment according to any one of claims 1 to 6 , further comprising elevating means for elevating and lowering the conveyor chain so as to be exposed on the liquid surface of the molten salt.

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