Tube array cooling type fish freezing equipment

Abstract

The invention discloses tube nest cooling type fish freezing equipment, and belongs to the technical field of tube type cooling heat exchange equipment, a tube type heat exchange assembly comprises a columnar heat exchange shell vertically installed in the center of a freezing bin, and the outer wall of the heat exchange shell is provided with a plurality of convex walls protruding outwards in an annular array; every two adjacent convex walls are connected through an arc side wall which is sunken inwards; two circles of heat exchange pipes are annularly arranged in the heat exchange shell in an annular array mode. One side of the tube wall of each heat exchange tube is provided with a strip-shaped flow channel hole, the flow channel holes are formed in the length directions of the heat exchange tubes, sealing columns capable of sealing the flow channel holes are installed in the flow channel holes, the two ends of each sealing column are each fixedly provided with a sliding block, and plane threads are machined on the fracture surfaces of the sliding blocks; two concentric gear rings are further rotationally installed on the end face of the heat exchange shell, and the two gear rings are in meshing transmission with the two circles of sliding blocks correspondingly through plane threads. Fish in the freezing bin can be quickly and efficiently frozen by flexibly and fully utilizing refrigerants, and high efficiency and energy conservation are achieved.

Description

Technical Field

[0001] The invention relates to the technical field of tubular cooling and heat exchange equipment, in particular to tubular cooling type frozen fish equipment. Background Art

[0002] In existing tubular refrigeration equipment, the cooling medium flows in the heat exchange tube, passes through the wall of the heat exchange tube, and quickly takes away the heat in the freezing equipment, thereby achieving the purpose of heat exchange and cooling, cooling and freezing the objects to be frozen in the equipment. In actual production, the freezing of fish is different. It is batch-based, with frequent delivery and random retrieval, so its freezing volume is large, and the number and type of objects to be frozen inside need to be changed frequently.

[0003] Traditional pipe layout is usually concentrated together in a serpentine pipe. These pipes are fixed and connected in series. They all flow into and out of the coolant synchronously. Therefore, the control of cooling efficiency depends solely on the delivery control of the external coolant. In addition, as far as the current refrigeration technology is concerned, the focus on the rapid heat dissipation and cooling of the refrigerant (coolant) by the refrigeration system itself has reached a bottleneck period, and it is difficult to make a major breakthrough. It is relatively difficult to further improve the cooling speed of the coolant itself. Moreover, this research has great limitations in the actual development and application of freezing technology in fish production. When more flexible freezing adjustments are required, it is difficult to meet the actual freezing needs in time. For example, when there are only a part of frozen fish in the freezing bin of a larger freezing equipment, the refrigerant input speed of the refrigeration system needs to be quickly reduced. When a large number of new fish are about to be put in, the refrigerant input speed is far behind the release speed, resulting in a very long time to achieve rapid freezing of the fish after being put in. Therefore, in practice, in order to freeze in time and keep the freshness of the fish, the refrigeration equipment must always be in full load operation to avoid the above problems. Therefore, in terms of improving freezing efficiency, it requires a lot of energy consumption. Summary of the invention

[0004] 1. Technical issues to be resolved

[0005] In view of the deficiencies of the prior art, the present invention provides a tube-in-tube cooling type fish freezing equipment to solve the problem that the tube-type refrigeration equipment in the prior art cannot take into account both efficiency and energy consumption when freezing fish.

[0006] (II) Technical solution

[0007] To achieve the above-mentioned purpose, the present invention provides the following technical solutions: a tube-in-tube cooling frozen fish equipment, comprising a freezing bin and a tubular heat exchange assembly located in the freezing bin, the tubular heat exchange assembly comprising a columnar heat exchange shell vertically installed in the center of the freezing bin, the outer wall of the heat exchange shell having a plurality of convex walls protruding outward in an annular array, and two adjacent convex walls are connected by an arc side wall recessed inward; two circles of heat exchange tubes are arranged in an annular array in the heat exchange shell, the heat exchange tubes are connected to a cooler that continuously supplies cooling liquid, and the number of large heat exchange tubes in the outer circle is half the number of small heat exchange tubes in the inner circle, and the volume of the large heat exchange tubes is twice the volume of the small heat exchange tubes, and the large heat exchange tubes are arranged close to the convex wall; in each heat exchange tube One side of the tube wall is provided with a strip-shaped flow channel hole, the flow channel hole is arranged along the length direction of the heat exchange tube, and a closing column that can close it is installed in the flow channel hole, and a slider is fixed at each end of the closing column, and a plane thread is processed on the cross section of at least one of the sliders; two concentric gear rings are also rotatably installed on the end surface of the heat exchange shell, the inner gear ring is located on the outer side, and the outer gear ring is located on the inner side, and the ends of the two gear rings facing the heat exchange shell are provided with a plane thread, and the inner and outer gear rings are respectively meshed with the inner and outer circles of sliders through the plane thread for transmission, and the two gear rings realize reverse rotation meshing transmission through a transmission gear, so that when the flow channel hole of one circle of heat exchange tubes is opened, the flow channel hole of the other circle of heat exchange tubes is closed.

[0008] Furthermore, three large heat exchange tubes are provided, and six small heat exchange tubes are provided, and three of the small heat exchange tubes are respectively arranged near the midpoints of the three arc side walls.

[0009] Furthermore, a central tube is provided on the central axis of the heat exchange shell, the central tube is connected to all the heat exchange tubes at the same time, and a control valve is provided on the pipeline connected to each heat exchange tube.

[0010] Furthermore, a slide groove is provided on the inner surface of the top wall of the heat exchange shell and is arranged radially along the circumscribed circle of the heat exchange shell. The slider is slidably installed in the slide groove and is meshed with the end face of the corresponding gear ring through a plane thread for transmission.

[0011] Furthermore, an annular groove for rotatably mounting the gear ring is provided on the top outer surface of the heat exchange shell, the annular groove intersects with the bottom portion of the slide groove, and sealing rings are embedded in both side walls of the annular groove for extrusion and sliding contact with the inner and outer side walls of the gear ring.

[0012] Furthermore, there are two circles of limit blocks in an annular array on the top outer surface of the heat exchange shell, and an annular guide groove is provided on the end surface of each gear ring away from the heat exchange shell. The limit blocks are slidably matched with the annular guide groove to guide the gear ring to be rotatably installed on the heat exchange shell.

[0013] Further, the transmission gear is meshed with a driving gear on a main shaft of a driving motor.

[0014] Furthermore, a heat-conducting pipe is coaxially installed in the heat exchange tube, and the heat-conducting pipe has a plurality of heat-conducting fins along its radial direction, and all the heat-conducting fins are arranged in an annular array and are integrally formed with the heat-conducting pipe;

[0015] One side of the tube wall of the heat exchange tube has a columnar protrusion, the flow channel hole is arranged in the protrusion, the cross section of the outlet end of the flow channel hole is an isosceles trapezoidal shape, and the closed column is fitted and connected with the outlet end.

[0016] Furthermore, multiple layers of storage plates are arranged in parallel and spaced from top to bottom in the freezing bin, all the storage plates are penetrated by a lead screw and a guide rod, the lead screw and the storage plates are threadedly engaged with each other through an elastic thread sleeve, and all the storage plates can reach the material extraction hole on the side wall of the freezing bin under the drive of the lead screw;

[0017] A number of limit struts of different lengths are vertically installed at the bottom of the freezer, and each storage board is provided with a number of through holes which is less than the number of the limit struts, and all the through holes correspond to some of the limit struts one by one, so that when one of the storage boards moves vertically downward, it contacts the top end of the corresponding limit strut and moves into place, and when the lead screw continues to be rotated, the elastic threaded sleeve on this storage board rotates relative to it.

[0018] Furthermore, the elastic threaded sleeve includes a bolt-shaped main body inserted from the upper surface of the placement plate, the light column segment of the main body is rotatably installed in the placement plate, the bottom end surface of the nut end thereof is in contact with the pressure spring sleeved on the outside of the light column segment via a gasket, and the threaded segment thereof is fastened and connected by a locking threaded cover rotatably installed on the lower surface of the placement plate in the form of a threaded fit.

[0019] (III) Beneficial effects

[0020] The present invention provides a tube-in-tube cooling type frozen fish equipment, which has the following beneficial effects: the present invention adopts a heat exchange shell of a special shape, and pre-installs two circles of heat exchange tubes arranged in a special array, which can improve the cooling efficiency on the basis of maximizing the freezing volume in the freezing bin, and can provide the heat exchange shell with continuous cooling performance without large fluctuations by cleverly controlling the input of the cooling medium in the heat exchange shell by alternating the two circles of heat exchange tubes, which is similar to one circle of heat exchange tubes working while the other circle of heat exchange tubes is on standby. It is possible to choose whether to open the heat exchange tubes to output the cooling medium, and how much and how fast to output the cooling medium according to needs, so as to flexibly adapt to the freezing needs of fish, and will not be opened at full load all the time to meet the freezing amount, thereby achieving the purpose of high efficiency and energy saving.

[0021] Moreover, in the present invention, both circles of heat exchange tubes can be in a working state of outputting coolant to the outside, that is, during the actual operation, when the transmission gear is slowly rotated, the closed columns of one circle have left the heat exchange tubes, thereby opening this circle of heat exchange tubes, while the closed columns of the other circle begin to approach their corresponding heat exchange tubes, but have not yet been plugged into contact with the flow channel holes, so that all heat exchange tubes are in a state of outputting coolant to the outside.

[0022] In summary, the present invention, based on the traditional refrigeration equipment that adjusts the refrigeration performance based on the control of the coolant delivery speed, also adds an innovative means of dynamically adjusting the structure of the heat exchange component itself to change the refrigeration performance, designs the positions and structures of multiple heat exchange tubes, changes the opening and closing timing and degree of their flow channel holes, and changes the actual charging amount of the refrigerant in the heat exchange shell, so as to maximize the cooling effect brought by the refrigerant and quickly freeze the fish in the freezing bin, which is both energy-saving and efficient. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 A cross-sectional schematic diagram of the present invention;

[0024] Figure 2 for Figure 1 A top view of the structure of the tubular heat exchange assembly;

[0025] Figure 3 Another cross-sectional schematic diagram of the present invention;

[0026] Figure 4 is a cross-sectional schematic diagram of a tubular heat exchange component;

[0027] Figure 5 for Figure 2 The enlarged view of point D in the middle;

[0028] Figure 6 for Figure 5 Schematic diagram of the end of the closed column in FIG.

[0029] Figure 7 is a schematic diagram of the end face of the inner gear ring;

[0030] Figure 8 for Figure 2 A simplified cross-sectional view at KK in the middle;

[0031] Fig. 9 The figure is a schematic diagram of an installation structure in which an elastic thread sleeve is mounted on a storage plate.

[0032] In the figure: freezing bin 1, material extraction hole 101, heat exchange shell 2, convex wall 201, arc side wall 202, large heat exchange tube 3, small heat exchange tube 4, central tube 5, inner gear ring 6, outer gear ring 7, transmission gear 8, limit block 9, annular guide groove 10, closing column 11, flow channel hole 12, slide groove 13, raised part 14, slider 15, sealing ring 16, heat conduction pipe fitting 17, heat conduction fin 18, elastic threaded sleeve 19, nut 1901, light column section 1902, threaded section 1903, gasket 20, pressure spring 21, locking nut cover 22, storage plate 23, screw 24, through hole 26, limit support rod 27. DETAILED DESCRIPTION

[0033] This specification will clearly and completely express the technical solutions in the following examples based on the drawings of the embodiments of the present invention. The implementation methods described in this specification are only some of the embodiments of the present invention, not all of them. All other embodiments extended and inspired by those skilled in the art based on these embodiments in this application without creative work should fall within the scope of protection of the present invention.

[0034] like Figure 1 A tube cooling type frozen fish equipment as shown in Figure 1 and Figure 3 The main structure includes a freezing chamber 1 and a tubular heat exchange component located in the freezing chamber 1, wherein the freezing chamber 1 is used to store the fish to be frozen, and the tubular heat exchange component is used to contain the cooling medium. When the cooling medium flows through the tubular heat exchange component, the fish in the freezing chamber 1 is cooled and frozen. Specifically in this embodiment, Figure 3-Figure 4 The above-mentioned tubular heat exchange assembly includes a columnar heat exchange shell 2 vertically installed in the center of the freezing bin 1. The heat exchange shell 2 stands upright in the freezing bin 1 to better absorb the heat in the freezing bin 1 and freeze the fish. During manufacturing, the outer wall of the heat exchange shell 2 has a plurality of convex walls 201 protruding outward in an annular array, and two adjacent convex walls 201 are connected by an arc side wall 202 concave inward. The heat exchange shell 2 has two circles of heat exchange tubes arranged in a circular array. The heat exchange tubes are connected to a cooler that continuously supplies cooling liquid. The input of the cooling liquid can be any medium and corresponding equipment that meets the cooling requirements in the prior art. In this embodiment, the number of large heat exchange tubes 3 in the outer circle is half the number of small heat exchange tubes 4 in the inner circle, and the volume of the large heat exchange tubes 3 is twice the volume of the small heat exchange tubes 4, that is, the amount of coolant stored is also twice. During installation, the large heat exchange tubes 3 need to be placed against the convex wall 201 to better match the special shape of the above-mentioned heat exchange shell 2, which makes the structure more compact and the cooling range more reasonable, leaving enough room for a larger freezing volume in the freezer 1. At the same time, in this embodiment, if Figure 2 , Figure 4-Figure 5, it is also necessary to have a strip-shaped flow channel hole 12 on one side of the tube wall of each heat exchange tube. This flow channel hole 12 is arranged along the length direction of the heat exchange tube, which can quickly release the coolant in it into the heat exchange shell 2 to improve the cooling performance. In practice, it is necessary to choose whether to open the closing column 11 to improve the cooling efficiency, and to choose whether to pass the cooling medium into all the heat exchange tubes. In order to better control the release of the coolant, a closing column 11 that can close it is installed in the flow channel hole 12. This closing column 11 is arranged along the busbar direction of the heat exchange tube, and refer to Figure 8 A slider 15 is fixed at each end of the heat exchange shell 2, and the slider 15 can be slidably mounted on the inner wall of the two ends of the heat exchange shell 2 to guide the sealing column to slide linearly. In order to drive the sealing column 11 to move, as shown in FIG. Figure 6 As shown, a plane thread can be machined on the cross section of at least one of the sliders 15. Accordingly, two concentric gear rings are rotatably mounted on the end surface of the heat exchange shell 2. The inner gear ring 6 is located on the outside to achieve internal meshing, while the outer gear ring 7 is located on the inside. The two gear rings face the inside of the heat exchange shell 2. Figure 7 As shown, a plane thread is provided, and the inner and outer gear rings are respectively engaged with the inner and outer circles of sliders 15 through the plane thread for transmission, that is, the rotation of each gear ring will drive the corresponding circle of sliders 15 to move, and then drive the closing columns 11 on the corresponding circle of annular array of heat exchange tubes to move, and the flow channel holes 12 of this circle of heat exchange tubes will be opened synchronously. In the above embodiment, two gear rings are required to be driven by a transmission gear 8, so that the reverse rotation meshing transmission can be well realized, that is, the two gear rings rotate in opposite directions, and the closing columns 11 on the corresponding two circles of heat exchange tubes also move in opposite directions. In this way, when the above-mentioned transmission gear 8 is rotated into place, the flow channel holes 12 of one circle of heat exchange tubes can be opened, and the flow channel holes 12 of the other circle of heat exchange tubes can be closed. This is beneficial for first injecting coolant into one circle of heat exchange tubes during use, while the coolant in the other circle of heat exchange tubes is in a working state of being discharged into the heat exchange shell 2. When the coolant in the other circle of heat exchange tubes is discharged, one of the above-mentioned circles of heat exchange tubes can be output toward the heat exchange shell 2, while the above-mentioned other circle of heat exchange tubes is in a closed state so that coolant can be injected again. Specifically in practice, a corresponding input pipe section (not shown in the figure) can be installed at the end of each heat exchange tube and connected to the output source of the coolant respectively. The operator can flexibly choose whether to input the coolant according to actual needs, and whether to output the coolant to the heat exchange shell 2 after input to improve the cooling performance, so that the freezing performance of the frozen fish equipment is more flexible and efficient, and the use of the coolant is more reasonable, more efficient and energy-saving.

[0035] When implementing it, Figure 2-Figure 4In this embodiment, there are three large heat exchange tubes 3 and six small heat exchange tubes 4, and three of the small heat exchange tubes 4 are respectively arranged at the midpoints of the three arc side walls 202, so that the amount of coolant in the outer circle can be roughly consistent with the amount of coolant in the inner circle, and the uniformity of the refrigeration performance is improved as much as possible. In addition, a central tube 5 is provided on the central axis of the heat exchange shell 2, and the central tube 5 is connected to all heat exchange tubes at the same time, and a control valve is provided on the pipeline connected to each heat exchange tube. This central tube 5 can be selected as a pipeline for inputting coolant, or it can be used to centrally output coolant.

[0036] like Figure 4-Figure 5 On the inner surface of the top wall of the heat exchange shell 2, there is a slide groove 13 arranged radially along the circumscribed circle of the heat exchange shell 2. The slider 15 is slidably installed in the slide groove 13, slides along its straight line, and is engaged with the end face of the corresponding gear ring through a flat thread. During installation, the top outer surface of the heat exchange shell 2 can be Figure 2 As shown, a ring groove is specially provided for the rotational installation of the gear ring. The ring groove intersects with the bottom of the groove of the slide groove 13 so as to slide and mesh with the end face thread of the gear ring. In addition, sealing rings 16 can be embedded in the groove walls on both sides of the ring groove to squeeze and slide with the inner and outer walls of the gear ring. The purpose is to improve the sealing performance of the gear ring and the sliding fit. As for the installation of the above-mentioned gear ring, the gear ring and other auxiliary components can be directly rotated and installed at the end of the heat exchange shell 2, or as shown in FIG. Figure 2 As shown, a circular end cover (not shown in the figure) is installed at the end of the heat exchange shell 2, and the installation can be adaptive. Figure 2 There are two circles of stop blocks 9 in an annular array on the outer surface of the top of the heat exchange shell 2, and an annular guide groove 10 is provided on the end surface of each gear ring away from the heat exchange shell 2. The stop blocks 9 are slidably matched with the annular guide groove 10 to guide the gear ring to be rotatably installed on the heat exchange shell 2. In actual use, the simplest way is that the transmission gear 8 is meshed with the driving gear on the main shaft of a driving motor.

[0037] To improve cooling efficiency, Figure 2 A heat-conducting pipe 17 is coaxially installed in the heat exchange tube. The heat-conducting pipe 17 has a plurality of heat-conducting fins 18 along its radial direction. All the heat-conducting fins 18 are arranged in a ring array and are integrally formed with the heat-conducting pipe 17 to quickly transfer heat and perform heat exchange to achieve the purpose of cooling, cooling and freezing.

[0038] In order to better adjust the speed and amount of coolant output by the heat exchange tube, the heat exchange tube has a columnar protrusion 14 on one side of the tube wall, and a flow channel hole 12 is provided in the protrusion 14. The cross-section of the outlet end of the flow channel hole 12 is an isosceles trapezoidal shape. The closing column 11 is fitted and connected with the outlet end. By changing the position of the closing column 11, the amount of coolant output to the heat exchange shell 2 can be flexibly and controllably adjusted.

[0039] Based on the above implementation structure, Figure 1 and Figure 3 In this freezing bin 1, multiple layers of storage plates 23 are arranged in parallel and spaced from top to bottom. All the storage plates 23 are penetrated by a lead screw 24 and a guide rod to form a screw mechanism. The lead screw 24 is rotated to move the storage plates 23 up and down, so as to adjust the position height of the frozen fish, so as to facilitate the taking and placing of materials, and better select the low-temperature area to achieve the purpose of high efficiency and energy saving. In this embodiment, the lead screw 24 and the storage plates 23 are threadedly matched through an elastic threaded sleeve 19. All the storage plates 23 can reach the material taking hole 101 on the side wall of the freezing bin 1 under the drive of the lead screw 24, so as to put and take fish. In addition, in this embodiment, it is also necessary to vertically install a plurality of limit struts 27 of different lengths at the bottom of the freezing bin 1. These limit struts 27 are used for a storage plate 23 corresponding to each top column, so as to achieve the purpose of controlling the installation height of the storage plate 23. Specifically, as Figure 1 and Figure 3 On each storage plate 23, there are a number of through holes 26, which is less than the number of the limiting struts 27. For example, there are 5 through holes 26 on the storage plate 23, and 6 limiting struts 27 of different lengths are vertically installed on the bottom of the freezing chamber 1. Then, when 5 of the limiting struts 27 pass through the 5 through holes 26, once they move downward to the top of the remaining limiting strut 27, because there is no through hole 26 at the corresponding position, this storage plate 23 will conflict with the remaining limiting strut 27, and this storage plate 23 will fall and be installed in place. In other words, in the present embodiment, all the through holes 26 correspond to some of the limiting struts 27 one by one, that is, each plate has a corresponding limiting strut 27 that cannot pass through, so that during the vertical downward movement of this storage plate 23, it contacts with the top end of its corresponding limiting strut 27 and moves into place to achieve positioning installation, and when the lead screw 24 continues to be rotated, the elastic threaded sleeve 19 on this storage plate 23 rotates relative to it, which will not prevent the continued rotation of the lead screw 24, and will not affect the relative vertical movement of the remaining storage plates 23 on the lead screw 24, and finally all the storage plates 23 are respectively lowered to the corresponding installation height position, forming a stacked freezer chamber with equal spacing from each other in the vertical direction.

[0040] In the above implementation structure, for the special structure in which the elastic threaded sleeve 19 and the storage plate 23 rotate relative to each other, the following can be done: Fig. 9As shown, the elastic threaded sleeve 19 includes a bolt-shaped body inserted from the upper surface of the storage plate 23, and the light column section 1902 of the body is rotatably installed in the storage plate 23. The bottom end surface of the nut 1901 end is in contact with the pressure spring 21 sleeved on the outside of the light column section 1902 through the gasket 20, and the threaded section 1903 is rotatably installed on the locking threaded cover on the lower surface of the storage plate 23 to be fastened in the form of threaded matching. Then, when the lead screw 24 rotates, as long as the storage plate 23 does not come into contact with the corresponding limit support rod 27, the storage plate 23 can be normally vertical under the action of the lead screw mechanism. When the above-mentioned contact occurs, the lead screw 24 continues to be rotated, which will allow the above-mentioned bolt-shaped body to rotate relatively in the storage plate 23, that is, overcome the elastic force of the above-mentioned pressure spring 21, and the elastic threaded sleeve 19 rotates in the storage plate 23, and the two are separated from the integrated connection relationship. In actual use, all the placement plates 23 can be moved one by one to the height position of the material extraction hole 101, and all the placement plates 23 can be dropped to their original positions by rotating the lead screw 24 to form a plurality of predetermined freezing chambers.

[0041] It should be explained here that, in this specification, terms such as first and second are only used to distinguish one feature from another, and do not mean that there is a certain relationship or order between these technical features. The terms "including" and "comprising" refer to the inclusion of one or some technical means or features, specifically meaning that there are other existing or non-existing technical features that have not been included. The discussion in the above embodiments is only a representative example for the present invention, and is by no means the only restrictive constraint feature. A person of ordinary skill in the art should understand that, without departing from the technical content recorded in all the claims of this application, some simple substitutions and modifications can be made, thereby changing or becoming equivalent to other specific embodiments and application scenarios. However, no matter how the adaptability is changed, these embodiments will inevitably fall within the scope of protection of the present invention.

Claims

1. A tube-in-tube cooling type frozen fish equipment, comprising a freezing chamber (1) and a tube-type heat exchange component located in the freezing chamber (1), characterized in that: The tubular heat exchange assembly comprises a columnar heat exchange shell (2) vertically installed in the center of the freezing chamber (1); the outer wall of the heat exchange shell (2) has a plurality of convex walls (201) protruding outward in an annular array, and two adjacent convex walls (201) are connected by an arc side wall (202) recessed inward; two circles of heat exchange tubes are arranged in an annular array in the heat exchange shell (2); the heat exchange tubes are connected to a cooler that continuously supplies cooling liquid, and the number of large heat exchange tubes (3) in the outer circle is half the number of small heat exchange tubes (4) in the inner circle, and the volume of the large heat exchange tubes (3) is twice the volume of the small heat exchange tubes (4), and the large heat exchange tubes (3) are arranged close to the convex walls (201); A strip-shaped flow channel hole (12) is provided on one side of the tube wall of each heat exchange tube. The flow channel hole (12) is arranged along the length direction of the heat exchange tube. A closing column (11) capable of closing the flow channel hole (12) is installed in the flow channel hole (12). A slider (15) is fixed at each end of the closing column (11), and a plane thread is processed on the cross section of at least one of the sliders (15). Two concentric gear rings are also rotatably installed on the end surface of the heat exchange shell (2). The inner gear ring (6) is located on the outer side, and the outer gear ring (7) is located on the inner side. The ends of the two gear rings facing the inside of the heat exchange shell (2) are provided with a plane thread. The inner and outer gear rings are respectively meshed with the inner and outer sliders (15) through the plane thread. The two gear rings are meshed through a transmission gear (8) to achieve reverse rotation. The flow channel holes (12) of one circle of heat exchange tubes are opened while the flow channel holes (12) of another circle of heat exchange tubes are closed.

2. A tubular cooling type frozen fish equipment according to claim 1, characterized in that: There are three large heat exchange tubes (3) and six small heat exchange tubes (4), and three of the small heat exchange tubes (4) are respectively arranged near the midpoints of the three circular arc side walls (202).

3. The tube-type frozen fish equipment according to claim 1, characterized in that: A central pipe (5) is provided on the central axis of the heat exchange shell (2), the central pipe (5) is connected to all heat exchange pipes at the same time, and a control valve is provided on the pipeline connected to each heat exchange pipe.

4. The tube-type frozen fish equipment according to claim 1, characterized in that: A slide groove (13) is provided on the inner surface of the top wall of the heat exchange shell (2) and is arranged radially along the circumscribed circle of the heat exchange shell (2). The slider (15) is slidably installed in the slide groove (13) and is meshed with the end face of the corresponding gear ring through a plane thread for transmission.

5. The tube-type frozen fish equipment according to claim 4, characterized in that: An annular groove for rotatably mounting a gear ring is provided on the top outer surface of the heat exchange shell (2), the annular groove intersects with the groove bottom portion of the slide groove (13), and sealing rings (16) are embedded in both side groove walls of the annular groove and are in extrusion and sliding contact with the inner and outer side walls of the gear ring.

6. The tube-type cooling frozen fish equipment according to claim 5, characterized in that: Two circles of limit blocks (9) are arranged in an annular array on the outer surface of the top end of the heat exchange shell (2); an annular guide groove (10) is arranged on the end surface of each gear ring away from the heat exchange shell (2); the limit blocks (9) are slidably matched with the annular guide groove (10) to guide the gear ring to be rotatably installed on the heat exchange shell (2).

7. The tube-type cooling frozen fish equipment according to claim 1, characterized in that: The transmission gear (8) is meshed with a driving gear on a main shaft of a driving motor.

8. The tube-type frozen fish equipment according to claim 1, characterized in that: A heat-conducting pipe (17) is coaxially installed in the heat exchange tube, and the heat-conducting pipe (17) has a plurality of heat-conducting fins (18) along its radial direction, and all the heat-conducting fins (18) are arranged in an annular array and are integrally formed with the heat-conducting pipe (17); One side of the wall of the heat exchange tube has a columnar protrusion (14), the protrusion (14) is provided with the flow channel hole (12), the cross section of the outlet end of the flow channel hole (12) is an isosceles trapezoidal shape, and the closed column (11) is fitted and connected to the outlet end.

9. The tube-type frozen fish equipment according to claim 1, characterized in that: Multiple layers of storage plates (23) are arranged in parallel and spaced from top to bottom in the freezing bin (1); all the storage plates (23) are penetrated by a lead screw (24) and a guide rod; the lead screw (24) and the storage plates (23) are threadedly engaged with each other via an elastic threaded sleeve (19); and all the storage plates (23) can reach the material extraction hole (101) on the side wall of the freezing bin (1) when driven by the lead screw (24); A plurality of limit struts (27) of different lengths are vertically installed at the bottom of the freezing bin (1), and each storage plate (23) is provided with a plurality of through holes (26) whose number is less than the number of the limit struts (27), and all the through holes (26) correspond to some of the limit struts (27) one by one, so that when one of the storage plates (23) moves vertically downward, it contacts the top end of the corresponding limit strut (27) and moves into position, and when the lead screw (24) continues to rotate, the elastic threaded sleeve (19) on this storage plate (23) rotates relative to it.

10. The tube-type frozen fish equipment according to claim 9, characterized in that: The elastic threaded sleeve (19) comprises a bolt-shaped main body inserted from the upper surface of the storage plate (23); the light column section (1902) of the main body is rotatably mounted in the storage plate (23); the bottom end surface of the nut (1901) thereof contacts a pressure spring (21) sleeved on the outside of the light column section (1902) via a gasket (20); and the threaded section (1903) thereof is rotatably mounted on the lower surface of the storage plate (23) and is fastened in a threaded fit.

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