Cooling pressing cage and spiral cold pressing machine

Abstract

The invention provides a cooling pressing cage which is used in cooperation with a single screw shaft or a multi-screw shaft and comprises a plurality of cage mounting plates arranged at intervals in the axial direction, and the edges of the two opposite sides of the cage mounting plates are fixedly connected through a first connecting plate and a second connecting plate correspondingly. A heat exchange channel is formed in the inner wall of an inner hole of the caging plate in the circumferential direction, a plurality of pressing strips are adjacently arranged on the side wall of the heat exchange channel in the circumferential direction, and a pressing chamber is defined by the pressing strips; and the heat exchange channel is communicated with an external circulation pipeline through a corresponding flow channel. The heat exchange channel is formed in the inner wall of the inner hole of the caging plate, cooling liquid is introduced into the heat exchange channel in a circulating mode during working, the temperature in the barrel is rapidly taken away through the cooling liquid, the design concept of low temperature and high pressure in the barrel is achieved, low-temperature pressing in the true sense is achieved, and the pressing efficiency is improved. And on the premise of ensuring the oil quality and low denaturation of protein in the cake, the oil production efficiency is improved to the maximum extent.

Description

Technical Field

[0001] The invention relates to the technical field of screw oil presses, in particular to a cooling pressing cage and a screw cold press. Background Art

[0002] The screw oil press is a kind of oil pressing equipment suitable for a variety of oils, and is widely used in small and medium-sized oil mills and family oil mills. It is based on the rotation and extrusion of the screw, and through the coordinated work of the pressing chamber, feeding device, screw assembly, gear box and motor, it can realize the pressing of peanuts, soybeans, sunflowers, rapeseed, walnuts, cotton seeds and other oils.

[0003] The screw oil press mainly uses the rotation of the screw shaft to gradually reduce the volume of the oil in the pressing chamber and the great pressure generated by various resistances to press the oil. Therefore, the friction resistance between the screw shaft and the pressed oil, and between the pressed oil and the pressing chamber will inevitably generate a lot of heat. This is an important factor affecting the lack of major breakthroughs in the research and development of low-temperature cold press technology in my country since 2002.

[0004] Domestically developed low-temperature oil presses, such as the twin-screw oil presses used to press oil at room temperature, have a pressing chamber pressing temperature of around 90°C, which is far from the internationally recognized low-temperature cold pressing process requirement of less than 65°C, and greatly exceeds the denaturation temperature of plant protein, making the pressed cake lose its comprehensive development and utilization value.

[0005] The more advanced foreign low-temperature oil presses, such as the Kp series low-temperature cold presses developed and produced by Germany's Kemreia-SKET, use cooling devices on the screw shaft, but the dry cake residual oil rate of the cold-pressed cake is still as high as 10% to 14%, and the oil loss is too large. The reason is that the pressing chamber pressure is too small. However, increasing the pressing chamber pressure will increase the temperature. Therefore, only by taking further measures to reduce the pressing chamber temperature can it be possible to increase the pressing chamber pressure, reduce the dry cake residual oil rate and reduce the oil loss.

[0006] The traditional screw oil press cage has a circular serrated inner hole formed by the arrangement of the pressing bars in the cage plate, which is the pressing chamber. From the characteristics of the pressing chamber, it can be seen that the heat generated by the friction resistance between the pressed oil and the pressing chamber is no less than the heat generated by the friction resistance between the screw shaft and the pressed oil; therefore, how to improve the current low-temperature and inefficient state of low-temperature oil presses into low-temperature and efficient process equipment, the research and development of the cooling design of the pressing cage has become the key to the problem. Summary of the invention

[0007] The invention provides a cooling pressing cage and a spiral cold press, which solve the problems in the prior art that the low-temperature spiral oil press reduces the pressing chamber temperature at the expense of the pressing chamber pressure, resulting in a high residual oil rate in the dry cake.

[0008] The technical solution of the present invention is achieved in this way:

[0009] A first aspect of the present invention provides a cooling pressing cage for use with a single screw shaft or a multi-screw shaft, the cooling pressing cage comprising a plurality of cage plates arranged at intervals along the axial direction, the opposite side edges of the plurality of cage plates being fixedly connected by a first connecting plate and a second connecting plate respectively; a heat exchange channel is circumferentially arranged on the inner wall of the inner hole of the cage plate, a plurality of pressing bars are circumferentially arranged on the side wall of the heat exchange channel, and the plurality of pressing bars are surrounded to form a pressing chamber; the heat exchange channel is connected to an external circulation pipeline through a corresponding flow channel.

[0010] The present invention arranges a heat exchange channel on the inner wall of the inner hole of the cage plate. When working, coolant is circulated into the heat exchange channel through an external circulation pipeline. The heat on the pressing bars is transferred to the heat exchange channel and then taken away by the coolant, thereby quickly reducing the pressing temperature in the pressing chamber, realizing the design concept of "low temperature and high pressure" in the pressing chamber, realizing low-temperature pressing in a true sense, and maximizing the oil output efficiency while ensuring the oil output quality and low denaturation of protein in the cake.

[0011] Optionally, the heat exchange channel includes a cooling water tank, a heat exchange tube is embedded in the cooling water tank, a plurality of the pressing strips are arranged closely along the circumference of the side wall of the heat exchange tube, and the heat exchange tube is connected to the external circulation pipeline through a corresponding flow channel.

[0012] Preferably, the heat exchange channel comprises a cooling water trough, a sealing sleeve is welded on the opening side of the cooling water trough, a plurality of the pressing strips are arranged closely along the circumference of the side wall of the sealing sleeve, and the cooling water trough is connected to the external circulation pipeline through a corresponding flow channel.

[0013] Preferably, the external circulation pipeline includes a shunt pipe and a water collecting pipe, and the shunt pipe and the water collecting pipe are respectively installed on the first connecting plate and the second connecting plate; the shunt pipe is connected with the heat exchange channel of each cage plate through the corresponding first flow channel, and the water collecting pipe is connected with the heat exchange channel of each cage plate through the corresponding second flow channel, and the shunt pipe and the water collecting pipe are respectively connected with the water inlet pipe and the water outlet pipe; low-temperature coolant is introduced into the shunt pipe through the water inlet pipe, and the coolant enters the heat exchange channel with the help of the first flow channel of each cage plate after being diverted by the shunt pipe to exchange heat with the pressing bars in the pressing chamber, and then is collected into the water collecting pipe through the second flow channel of each cage plate, and finally is discharged from the water outlet pipe. By connecting the circulation pipelines of the heat exchange channels of multiple cage plates in parallel, the pipeline layout cost can be saved, the pipeline layout space can be reduced, and on-site installation and use are convenient.

[0014] Optionally, the external circulation pipeline includes several groups of independent water inlet pipes and water outlet pipes, and each group of the water inlet pipes and water outlet pipes are connected to the heat exchange channel of the corresponding cage plate through the first flow channel and the second flow channel respectively; by independently setting the circulation pipelines of the heat exchange channels of each cage plate, the medium temperature, flow rate and other parameters of each circulation pipeline can be independently adjusted to accurately control the temperature of different parts in the pressing chamber.

[0015] Optionally, the cage plate is composed of two semi-annular plates, and the two semi-annular plates are detachably connected via a connecting piece. This detachable cage plate structure is more suitable for installation in large and medium-sized machines.

[0016] Specifically, a pressure plate is fixedly installed at both ends of the inner hole of each semi-annular plate, and several pressing strips are arranged closely between the two pressing plates. Through the pressure plates at both ends, several pressing strips can be tightly pressed onto the inner wall of the sealing sleeve corresponding to the inner hole of the semi-annular plate.

[0017] Furthermore, the heat exchange channel and the sealing sleeve are both two-section split structures, and both end openings of the heat exchange channel are provided with sealing plugs; the first connecting plate, the second connecting plate, the diverter pipe, the water collecting pipe, the first flow channel, and the second flow channel are each provided with two groups, which are respectively used for circulating water through the heat exchange channels inside the two semi-annular plates; since pressure plates are installed at both ends of the inner holes of the semi-annular plates, the original integral annular heat exchange channel and the sealing sleeve are separated into two independent structures by the pressure plates. Therefore, by setting two groups of independent circulation pipelines, coolant is respectively introduced into the heat exchange channels in the two semi-annular plates to realize circulating cooling of the split cage plate.

[0018] Specifically, the connecting parts include bolts, pins and ear plates, and the sides of the two first connecting plates and the second connecting plates are provided with through holes for installing bolts; ear plates are respectively installed at both ends of the bottom surfaces of the two second connecting plates, and the pins pass through the axial holes of the four ear plates in sequence; the two second connecting plates at the bottom ends of the two semi-annular plates are hinged by ear plates and pins, so as to facilitate automatic alignment of the two semi-annular plates when closed, and the two first connecting plates at the upper part of the two semi-annular plates are locked by bolts, and the two second connecting plates at the lower part of the two semi-annular plates are locked by bolts to achieve locking and fixation of the two semi-annular plates.

[0019] Furthermore, a notch is provided at the position where the water collecting pipe passes through the ear plate, and the notch is seal-welded to the ear plate, so as to avoid the ear plate affecting the layout path of the water collecting pipe without affecting the sealing of the water collecting pipe.

[0020] Furthermore, the bolt is installed at a position between two adjacent cage plates on the first connecting plate and between two adjacent cage plates on the second connecting plate, and the penetration path of the bolt is staggered with the first flow channel in the first connecting plate and the second flow channel in the second connecting plate, thereby avoiding the influence of the installation of the bolt on the first flow channel and the second flow channel.

[0021] A second aspect of the present invention provides a screw cold press, comprising a screw oil press body, wherein a pressing cage of the screw oil press body adopts the above-mentioned cooling pressing cage. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0023] Figure 1 It is a schematic diagram of the internal structure of the integrated cage plate in an embodiment of the present invention;

[0024] Figure 2 It is a schematic diagram of the internal structure of the split cage plate in an embodiment of the present invention;

[0025] Figure 3 It is a schematic diagram of the structure after the split cage plate is opened in the embodiment of the present invention;

[0026] Figure 4 This is a front view of a cooling pressing cage in an embodiment of the present invention;

[0027] Figure 5 A top view of a cooling pressing cage in an embodiment of the present invention;

[0028] Figure 6 A bottom view of a cooling pressing cage in an embodiment of the present invention;

[0029] In the figure: 1. cage plate; 2. first connecting plate; 3. second connecting plate; 4. cooling water trough; 5. sealing sleeve; 6. pressing bar; 7. diverter pipe; 8. water collecting pipe; 9. first flow channel; 10. second flow channel; 11. water inlet pipe; 12. water outlet pipe; 13. semi-annular plate; 14. pressure plate; 15. sealing plug; 16. bolt; 17. pin shaft; 18. ear plate; 19. notch. DETAILED DESCRIPTION

[0030] The technical solution of the present invention will be clearly and completely described below in conjunction with the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0031] Reference Figures 1 to 6 A first aspect of an embodiment of the present invention provides a cooling pressing cage for use with a single screw shaft or a multi-screw shaft, wherein the cooling pressing cage comprises a plurality of cage plates 1 arranged at intervals along the axial direction, and the opposite side edges of the plurality of cage plates 1 are fixedly connected by a first connecting plate 2 and a second connecting plate 3 respectively; a heat exchange channel is circumferentially arranged on the inner wall of the inner hole of the cage plate 1, and a plurality of pressing bars 6 are closely arranged on the side wall of the heat exchange channel along the circumferential direction, and the plurality of pressing bars 6 are surrounded to form a pressing chamber; the heat exchange channel is connected to an external circulation pipeline through a corresponding flow channel.

[0032] The present invention arranges a heat exchange channel on the inner wall of the inner hole of the cage plate 1. When working, a coolant is circulated into the heat exchange channel through an external circulation pipeline. The heat on the pressing bars 6 is transferred to the heat exchange channel and then taken away by the coolant, thereby quickly reducing the pressing temperature in the pressing chamber, realizing the design concept of "low temperature and high pressure" in the pressing chamber, realizing low-temperature pressing in a true sense, and maximizing the oil output efficiency while ensuring the oil output quality and low denaturation of protein in the cake.

[0033] Optionally, the heat exchange channel includes a cooling water tank 4, in which a heat exchange tube (not shown) is embedded, and a plurality of the pressing bars 6 are arranged closely along the circumference of the side wall of the heat exchange tube, and the heat exchange tube is connected to the external circulation pipeline through a corresponding flow channel.

[0034] Preferably, if Figure 1 As shown, the heat exchange channel includes a cooling water trough 4, a sealing sleeve 5 is welded on the open side of the cooling water trough 4, a plurality of pressing bars 6 are arranged closely along the circumference of the side wall of the sealing sleeve 5, and the cooling water trough 4 is connected to the external circulation pipeline through the corresponding flow channel.

[0035] In this embodiment, a closed annular heat exchange channel is obtained by opening a cooling water trough 4 on the inner wall of the inner hole of the cage plate 1 and welding a sealing sleeve 5. In the specific implementation process, it is not limited to the method of embedding a heat exchange copper tube in the cooling water trough 4. Cooling liquid can be circulated in the heat exchange copper tube to achieve rapid cooling of the pressing chamber.

[0036] The sealing sleeve 5 in this embodiment is made of a metal material having welding performance similar to that of the cage plate, and the thickness of the sealing sleeve 5 is not easy to be too thick (too thick will lead to reduced heat transfer efficiency); the width of the sealing sleeve 5 is greater than the width of the cooling water trough 4, thereby ensuring the welding sealing effect.

[0037] During the specific implementation process, the cooling water tank 4 is not limited to the processing method, and its cross section is not limited to being designed as a semicircular, rectangular or other shapes; the coolant is not limited to using water, cooling oil or other heat-conducting media.

[0038] In this embodiment, cooling water grooves 4 can be arranged in all cage plates 1 along the entire axial length of the pressing cage to achieve full cooling of the pressing cage along the axial length, or cooling water grooves 4 can be arranged in part of the cage plates 1 along the axial length of the pressing cage to achieve local cooling of the pressing cage along the axial length.

[0039] Preferably, if Figures 1 to 3 As shown, the external circulation pipeline includes a shunt pipe 7 and a water collecting pipe 8, and the shunt pipe 7 and the water collecting pipe 8 are respectively installed on the first connecting plate 2 and the second connecting plate 3; the shunt pipe 7 is respectively communicated with the cooling water trough 4 of each cage plate 1 through the corresponding first flow channel 9, and the water collecting pipe 8 is respectively communicated with the cooling water trough 4 of each cage plate 1 through the corresponding second flow channel 10, and the shunt pipe 7 and the water collecting pipe 8 are respectively communicated with the water inlet pipe 11 and the water outlet pipe 12; low-temperature coolant is introduced into the shunt pipe 7 through the water inlet pipe 11, and the coolant is divided by the shunt pipe 7 and enters the cooling water trough 4 through the first flow channel 9 of each cage plate 1 to exchange heat with the pressing bars 6 in the pressing chamber, and then is collected into the water collecting pipe 8 through the second flow channel 10 of each cage plate 1, and finally is discharged from the water outlet pipe 12. By connecting the circulation pipelines of the cooling water troughs 4 of multiple cage plates 1 in parallel, the pipeline layout cost can be saved, the pipeline layout space can be reduced, and on-site installation and use are convenient.

[0040] In this embodiment, Figures 1 to 3 As shown, the first connecting plate 2 is located at the upper part of the cage plate 1, and the second connecting plate 3 is located at the lower part of the cage plate 1. The first connecting plate 2 and the second connecting plate 3 can be integrally cast or welded with the cage plate 1. The first flow channel 9 penetrates from the top surface of the first connecting plate 2 to the cooling water trough 4 inside the cage plate 1, and the second flow channel 10 penetrates from the bottom surface of the second connecting plate 3 to the cooling water trough 4 inside the cage plate 1.

[0041] Furthermore, in this embodiment, if Figures 1 to 3 As shown, the cross-sections of the diverter pipe 7 and the water collecting pipe 8 are semicircular, which can well adapt to the surface shapes of the first connecting plate 2 and the second connecting plate 3; during the specific implementation process, the cross-sectional shapes can also be flexibly selected according to actual conditions.

[0042] In the present embodiment, the diverter pipe 7 and the water collecting pipe 8 are obtained by axially cutting a circular tube from the end face. The side edge of the diverter pipe 7 is sealed and welded to the top face of the first connecting plate 2 to form a semicircular tube cavity, and the inlets of all the first flow channels 9 on the top face of the first connecting plate 2 are all connected in parallel in the semicircular tube cavity corresponding to the diverter pipe 7; the side edge of the water collecting pipe 8 is sealed and welded to the bottom face of the second connecting plate 3 to form a semicircular tube cavity, and the outlets of all the second flow channels 10 on the bottom face of the second connecting plate 3 are all connected in parallel in the semicircular tube cavity corresponding to the water collecting pipe 8; plugs are welded at both ends of the diverter pipe 7 and the water collecting pipe 8.

[0043] Optionally, the external circulation pipeline includes several groups of independent water inlet pipes 11 and water outlet pipes 12, and each group of the water inlet pipes 11 and water outlet pipes 12 are respectively connected to the cooling water trough 4 of the corresponding cage plate 1 through the first flow channel 9 and the second flow channel 10; by independently setting the circulation pipelines of the cooling water troughs 4 of each cage plate 1, the medium temperature, flow rate and other parameters of each circulation pipeline can be independently adjusted to accurately control the temperature of different parts in the pressing chamber.

[0044] Alternatively, if Figure 2 , 3 As shown, the cage plate 1 is composed of two semi-annular plates 13, and the two semi-annular plates 13 are detachably connected by a connecting piece. This detachable cage plate 1 structure is more suitable for the installation of large and medium-sized machines.

[0045] The cage plate 1 of the present embodiment may adopt an integral structure that cannot be opened and closed. When the cage plate 1 is an integral structure, the cooling water trough 4 inside it is a continuous annular groove, and there is no need to use a sealing plug 15. The cage plate 1 of the present embodiment may also adopt an openable and closable split structure. When the cage plate 1 is a split structure, the cooling water trough 4 inside it is two sections of discontinuous semi-annular grooves. If the two ends of the semi-annular groove pass through the opening and closing end faces of the semi-annular plate 13, it is necessary to weld sealing plugs 15 at both ends of the semi-annular groove for sealing. If the two ends of the semi-annular groove do not pass through the opening and closing end faces of the semi-annular plate 13, there is no need to weld sealing plugs 15 at both ends of the semi-annular groove for sealing.

[0046] Specifically, Figure 2 , 3 As shown, a pressure plate 14 is fixedly installed at both ends of the inner hole of each semi-annular plate 13, and a plurality of pressing strips 6 are arranged closely between the two pressing plates 14. The pressing plates 14 at both ends can press the plurality of pressing strips 6 tightly onto the inner wall of the sealing sleeve 5 corresponding to the inner hole of the semi-annular plate 13.

[0047] Furthermore, if Figure 2 , 3As shown, the cooling water trough 4 and the sealing sleeve 5 are both two-section split structures, and the openings at both ends of the cooling water trough 4 are provided with sealing plugs 15; the first connecting plate 2, the second connecting plate 3, the diverter pipe 7, the water collecting pipe 8, the first flow channel 9, and the second flow channel 10 are each provided with two groups, which are respectively used for the circulation of water in the cooling water troughs 4 inside the two semi-annular plates 13; since pressure plates 14 are installed at both ends of the inner hole of the semi-annular plate 13, the original integral annular cooling water trough 4 and the sealing sleeve 5 are separated into two independent structures by the pressure plate 14. Therefore, by setting two groups of independent circulation pipelines, coolant is respectively introduced into the cooling water troughs 4 in the two semi-annular plates 13, so as to realize the circulation cooling of the split cage plate 1.

[0048] Specifically, Figures 2 to 6 As shown, the connecting member includes a bolt 16, a pin 17 and an ear plate 18, and the sides of the two first connecting plates 2 and the second connecting plates 3 are provided with through holes for installing the bolts 16; the two ends of the bottom surfaces of the two second connecting plates 3 are respectively installed with ear plates 18, and the pin 17 passes through the axial holes of the four ear plates 18 in sequence; the two second connecting plates 3 at the bottom ends of the two semi-annular plates 13 are hinged by the ear plates 18 and the pin 17, so as to facilitate the automatic alignment of the two semi-annular plates 13 when closed, and the two first connecting plates 2 at the upper part of the two semi-annular plates 13 are locked by the bolts 16, and the two second connecting plates 3 at the lower part of the two semi-annular plates 13 are locked by the bolts 16, so as to realize the locking and fixation of the two semi-annular plates 13.

[0049] Furthermore, if Figure 6 As shown, a notch 19 is opened at the position where the water collecting pipe 8 passes through the ear plate 18, and the notch 19 is sealed and welded to the ear plate 18, which can prevent the ear plate 18 from affecting the layout path of the water collecting pipe 8 without affecting the sealing of the water collecting pipe 8.

[0050] Furthermore, if Figures 4 to 6 As shown, the bolt 16 is installed at a position between two adjacent cage plates 1 on the first connecting plate 2 and between two adjacent cage plates 1 on the second connecting plate 3, and the penetration path of the bolt 16 is staggered with the first flow channel 9 in the first connecting plate 2 and the second flow channel 10 in the second connecting plate 3, so as to avoid the influence of the installation of the bolt 16 on the first flow channel 9 and the second flow channel 10.

[0051] During the specific implementation process, the internal structure of the cooling cage of this embodiment can be adaptively adjusted according to the number of spiral shafts to adapt to the cooling of the cage of a multi-spiral cold press; the cooling cage of this embodiment is not limited to use with a single spiral shaft or a double spiral shaft.

[0052] A second aspect of an embodiment of the present invention provides a screw cold press, comprising a screw oil press body, wherein a pressing cage of the screw oil press body adopts the above-mentioned cooling pressing cage.

[0053] The working process of cooling the pressing cage in this embodiment is as follows:

[0054] A low-temperature coolant is introduced into the semicircular tube cavity corresponding to the shunt pipe 7 through the water inlet pipe 11, and the low-temperature coolant is shunted from the shunt pipe 7 into the first flow channel 9 of each cage plate 1, and flows into the cooling water tank 4 of each cage plate 1 from the outlet at the bottom of each first flow channel 9. The coolant exchanges heat with the sealing sleeve 5 in the cooling water tank 4, and quickly takes away the heat generated by the friction between the blank and the pressing bar 6 in the pressing chamber, thereby realizing rapid cooling of the pressing chamber; the coolant after heat exchange is respectively collected from each second flow channel 10 into the semicircular tube cavity corresponding to the water collecting pipe 8, and finally discharged through the water outlet pipe 12. The discharged coolant is cooled and then introduced into the cooling water tank 4 through the water inlet pipe 11, thereby realizing water-cooled circulation heat dissipation of the pressing chamber.

[0055] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principle of the present invention should be included in the protection scope of the present invention.

Claims

1. A cooling pressing cage, used in conjunction with a single screw shaft or multiple screw shafts, characterized in that: The cooling pressing cage comprises a plurality of cage plates (1) arranged at intervals along the axial direction, and the opposite side edges of the plurality of cage plates (1) are fixedly connected by a first connecting plate (2) and a second connecting plate (3) respectively; a heat exchange channel is provided on the inner wall of the inner hole of the cage plate (1) along the circumferential direction, and a plurality of pressing bars (6) are arranged adjacent to the side wall of the heat exchange channel along the circumferential direction, and the plurality of pressing bars (6) are surrounded to form a pressing chamber; the heat exchange channel is connected to an external circulation pipeline through a corresponding flow channel.

2. A cooling pressing cage as claimed in claim 1, characterized in that: The heat exchange channel comprises a cooling water tank (4), a heat exchange pipe is embedded in the cooling water tank (4), a plurality of pressing bars (6) are arranged closely along the circumference of the side wall of the heat exchange pipe, and the heat exchange pipe is connected to the external circulation pipeline through a corresponding flow channel.

3. A cooling pressing cage as claimed in claim 1, characterized in that: The heat exchange channel comprises a cooling water trough (4), a sealing sleeve (5) is welded on the opening side of the cooling water trough (4), a plurality of pressing bars (6) are arranged closely along the circumference of the side wall of the sealing sleeve (5), and the cooling water trough (4) is connected to an external circulation pipeline through a corresponding flow channel.

4. A cooling pressing cage as claimed in claim 1, characterized in that: The external circulation pipeline comprises a shunt pipe (7) and a water collecting pipe (8), and the shunt pipe (7) and the water collecting pipe (8) are respectively installed on the first connecting plate (2) and the second connecting plate (3); the shunt pipe (7) is respectively connected to the heat exchange channel of each cage plate (1) through the corresponding first flow channel (9), and the water collecting pipe (8) is respectively connected to the heat exchange channel of each cage plate (1) through the corresponding second flow channel (10); the shunt pipe (7) and the water collecting pipe (8) are respectively connected to the water inlet pipe (11) and the water outlet pipe (12).

5. A cooling pressing cage as claimed in claim 1, characterized in that: The external circulation pipeline comprises a plurality of groups of independent water inlet pipes (11) and water outlet pipes (12), and each group of the water inlet pipes (11) and water outlet pipes (12) are respectively connected to the heat exchange channel of the corresponding cage plate (1) through the first flow channel (9) and the second flow channel (10).

6. A cooling pressing cage as claimed in claim 4 or 5, characterized in that: The cage plate (1) is composed of two semi-annular plates (13), and the two semi-annular plates (13) are detachably connected via a connecting piece; a pressing plate (14) is fixedly installed at both ends of the inner hole of each semi-annular plate (13), and a plurality of the pressing bars (6) are arranged closely between the two pressing plates (14).

7. A cooling pressing cage as claimed in claim 6, characterized in that: The heat exchange channel and the sealing sleeve (5) are both two-section split structures, and both end openings of the heat exchange channel are provided with sealing plugs (15); the first connecting plate (2), the second connecting plate (3), the diverter pipe (7), the water collecting pipe (8), the first flow channel (9), and the second flow channel (10) are each provided with two groups respectively, which are used for circulating water in the heat exchange channels inside the two semi-annular plates (13).

8. A cooling pressing cage as claimed in claim 6, characterized in that: The connecting member comprises a bolt (16), a pin (17) and an ear plate (18); the sides of the two first connecting plates (2) and the second connecting plates (3) are provided with through holes for installing the bolts (16); the through holes are provided between two adjacent cage plates (1); the two first connecting plates and the two second connecting plates are connected by bolts respectively; the bottom ends of the two second connecting plates (3) are provided with ear plates (18); the pin (17) passes through the axial holes of the four ear plates (18) in sequence.

9. A cooling pressing cage as claimed in claim 8, characterized in that: A notch (19) is provided at the position where the water collecting pipe (8) passes through the ear plate (18), and the notch (19) is sealed and welded to the ear plate (18).

10. A screw cold press, comprising a screw oil press body, characterized in that: The pressing cage of the screw oil press body adopts the cooling pressing cage as described in any one of claims 1 to 9.

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