A device and method for preparing a capacitor film

Abstract

The present invention belongs to the technical field of capacitor film production, and particularly relates to a device and method for preparing a capacitor film, wherein the device comprises: a fixed frame, on which are provided a plurality of groups of equally spaced support frames; a plurality of cooling rollers, each group of support frames being provided with a cooling roller, and the cooling roller being provided with a cooling inlet channel and a cooling outlet channel; a cooling circuit system, comprising a plurality of cooling grooves, a plurality of cooling delivery pumps, and a plurality of coolers; wherein the number of the cooling grooves is equal to the number of the cooling rollers, and a cooler is provided in each cooling groove; one side of the fixed frame is an input side, and the other side is an output side, and the temperature of the cooling liquid input into the cooling roller increases gradually from the output side to the input side, and the cooling liquid is discharged from the cooling roller close to the output side and input into a cooling groove for temporary storage or cooling, and then is transported to the adjacent cooling roller close to the input side through a cooling delivery pump.

Description

Technical Field

[0001] The present invention belongs to the technical field of capacitor film production, and in particular relates to a device and method for preparing a capacitor film. Background Art

[0002] Metallized films for capacitors widely use polymer films as core dielectric materials. Currently, commonly used films include polypropylene and polyester. In the 1980s, Chinese enterprises introduced metallized polypropylene film vacuum coating manufacturing technology and equipment, continuously digested and absorbed foreign advanced technologies, and combined with actual production processes to improve technology, and the production and manufacturing level has been greatly improved. With the development of modern science and technology and industry, users have put forward higher requirements for the safety and reliability of metallized film capacitors. As the key material of such capacitors, it is very important to improve the performance and quality of metallized polypropylene film.

[0003] The film base of the capacitor film needs to go through extrusion, heating, stretching, cooling and annealing processes during preparation; cooling is usually done by placing it in a ventilated place for natural cooling or by cooling it with a cooling roller. However, the cooling time through natural cooling is relatively long, while the cooling through the contact between the low-temperature cooling roller and the film surface causes the film surface to drop from a higher temperature to an ideal low temperature within a short contact time. The temperature drop in this short time is likely to affect the overall structural strength and quality of the base film, thereby resulting in poor quality of the capacitors produced later. Summary of the invention

[0004] The purpose of the present invention is to provide a preparation device and method for shortening the production time of capacitor film and ensuring the production quality in view of the above-mentioned technical problems.

[0005] In view of this, the present invention provides a device for preparing a capacitor film, comprising:

[0006] A fixed frame having a plurality of groups of equally spaced support frames;

[0007] A plurality of cooling rollers, each group of support frames is provided with a cooling roller, and the cooling roller is provided with a cooling inlet channel and a cooling outlet channel;

[0008] A cooling circuit system, including a plurality of cooling tanks, a plurality of cooling delivery pumps, and a plurality of coolers;

[0009] The number of cooling grooves is equal to the number of cooling rollers, and a cooler is arranged in each cooling groove; one side of the fixed frame is the input side, and the other side is the output side. The temperature of the coolant input into the cooling roller increases gradually from the output side to the input side, and the coolant is discharged from the cooling roller on the output side and input into a cooling groove for temporary storage or cooling, and then transported to the adjacent cooling roller on the input side through a cooling delivery pump.

[0010] The device also includes an external control cabinet, which is equipped with a control circuit and a controller, etc. A temperature detection device for detecting the surface temperature of the input film and a speed detector for detecting the passing speed of the film are arranged at the front of the input side of the device, and the temperature detection device feeds back the detected data to the controller. A transmission wheel is arranged on one side of each cooling roller to drive it to rotate, and the transmission wheel is driven to rotate through the transmission belt, the driving wheel and the transmission motor.

[0011] In the present technical solution, in the above technical solution, further, the cooling roller comprises:

[0012] The roller body is in the shape of a ring column;

[0013] Two end roller shafts are provided with covers and are respectively connected to the ends of the roller body, and cooling channels are formed thereon, wherein the cooling channel in the end roller shaft at one end is a cooling inlet channel, and the cooling channel in the end roller shaft at the other end is a cooling outlet channel;

[0014] A plurality of cooling plates, each having a plurality of annular cooling channels, are sequentially arranged in the roller body;

[0015] A cooling input pipe, one end of which is connected to the cooling channel of one of the end rollers, and the other end is formed with an input branch pipe connected to each cooling disk;

[0016] A cooling output pipeline has one end connected to the cooling channel of the roller shaft at the other end, and the other end is formed with an output branch pipe connected to each cooling disk.

[0017] In the above technical solution, further, the cooling plate includes:

[0018] A plurality of cooling receiving parts connected end to end and forming a ring structure with a notch;

[0019] A cooling input member connected to a cooling receiving member on one side of the notch;

[0020] A cooling output member, one side of which is connected to the cooling receiving member on the other side of the notch, and the other side of which is connected and matched with the cooling input member;

[0021] A cooling input connector connected to a cooling input member;

[0022] A cooling output connector is connected to a cooling output component.

[0023] A plurality of connecting receiving parts are respectively arranged between adjacent cooling receiving parts, between the cooling receiving part and the cooling input part, and between the cooling output part and the cooling receiving part.

[0024] In the above technical solution, further, the cooling receiving member, the cooling input member and the cooling output member all include:

[0025] The heat dissipation fins have a fan-shaped cross section, and the outer wall fits the inner wall of the roller body;

[0026] The main pipe joint is integrally formed in the middle of the heat sink fin;

[0027] Two side joints are integrally formed on the heat dissipation fins and are respectively located on both sides of the main pipe joint;

[0028] The flow channel hole, the main pipe joint and the side joint are all provided with flow channel holes penetrating the heat dissipation fins, and the side joint and the main pipe joint can be inserted into the flow channel holes.

[0029] The flow channel holes in the cooling input part and the cooling output part are formed with a cut-off portion for cutting off the flow channel holes; the outer wall of each heat dissipation fin is formed with a positioning groove, and the inner wall of the roller body is formed with a positioning rib that matches the positioning groove; the cooling flow channel includes a main cooling flow channel and a side cooling flow channel; and the flow channel holes on several main pipe joints are connected end to end to form a main cooling channel, and the flow channel holes on several side joints on the same side are connected end to end to form a side cooling channel. The connecting parts are respectively arranged at the connection between the flow channel hole and the main pipe joint and the side joint.

[0030] In the above technical solution, further,

[0031] The cooling input also includes:

[0032] Access pipes: The cooling input member is provided with three access pipes respectively connected with the flow channel holes, and the cooling input connector is connected with the access pipes;

[0033] The cooling output member further comprises:

[0034] The cooling output member is provided with three discharge pipes respectively connected with the flow channel holes, and the cooling output joint is connected with the discharge pipe.

[0035] In the above technical solution, further, the connecting member includes:

[0036] Joint connector, which is arranged at the end of the main joint or the side joint;

[0037] The hole contact piece is arranged in one end of the flow channel hole away from the main pipe joint or the bypass joint;

[0038] A middle support member, arranged on the hole contact member;

[0039] The joint connector is sealed with the hole contact piece, and the middle support piece is pressed between the joint connector and the hole contact piece.

[0040] In the above technical solution, further,

[0041] Connector parts include:

[0042] The connector body is annular and has a contact portion formed at one end, and the outer wall of the contact portion is a conical surface with a decreasing diameter from the connector body to the outside;

[0043] The connecting edge has an outer diameter greater than that of the connecting piece body and is integrally formed at an end of the connecting piece body away from the contact portion;

[0044] Hole contacts include:

[0045] The contact body is annular, and one end of the inner wall is formed with a contact surface that matches the contact portion;

[0046] A contact groove is formed on the inner wall of the contact body and away from the other end of the contact surface;

[0047] The connecting edge can be slidably matched with the contact slide groove, and the middle support member is arranged on the contact slide groove and can be pressed between the end surface of the connecting edge and the end surface of the contact slide groove.

[0048] In the above technical solution, further, the cooling input connector includes:

[0049] Input main pipe, used to connect with input branch pipe;

[0050] The output main branch pipe is coaxially arranged with the input main pipe and is connected to the input main pipe;

[0051] Two output side branch pipes are respectively arranged on both sides of the input main pipe and can be connected to the input main pipe;

[0052] The switching adjustment member is arranged in the input main pipe and can be used to connect the input main pipe with the output side branch pipe.

[0053] The beneficial effects of the present invention are:

[0054] 1. The preparation device adopts multi-stage step-by-step cooling, which can ensure the cooling of the film and the quality of the produced film;

[0055] 2. By setting up multiple annular cooling plates with multiple cooling channels in the cooling plates, the temperature of the coolant in the cooling plates at each position of the cooling roller is ensured to be the same. By changing the number of cooling channels that are open, the operating cooling under different film conveying speeds can be adapted. BRIEF DESCRIPTION OF THE DRAWINGS

[0056] Figure 1 It is a schematic diagram of the structure of the present invention;

[0057] Figure 2 It is a partial structural schematic diagram of the present invention;

[0058] Figure 3is a schematic cross-sectional view of a cooling roller in the present invention;

[0059] Figure 4 It is a schematic diagram of the structure of the cooling plate in the present invention;

[0060] Figure 5 It is a partial cross-sectional schematic diagram of the cooling plate in the present invention;

[0061] Figure 6 yes Figure 5 A partial enlarged view of point Ⅰ in the middle;

[0062] Figure 7 This is a schematic structural diagram of the cooling receiving member in the present invention from a first viewing angle;

[0063] Figure 8 It is a schematic structural diagram of the cooling receiving member in the present invention from another perspective;

[0064] Fig. 9 It is a schematic structural diagram of the cooling input member in the present invention from a first viewing angle;

[0065] Fig.10 is a schematic structural diagram of the cooling input member of the present invention from a second viewing angle;

[0066] Fig.11 It is a schematic diagram of the structure of the cooperation between the cooling input member and the cooling input joint in the present invention;

[0067] The symbols in the figure are as follows: 1-fixed frame, 2-cooling tank, 3-cooling delivery pump, 4-cooler, 5-roller body, 6-end roller shaft, 7-cooling input pipeline, 8-cooling output pipeline, 9-cooling plate, 9a-heat dissipation fin, 9b-main pipe joint, 9c-side joint, 9d-flow channel hole, 9e-cut-off part, 9f-positioning groove, 91-cooling receiving part, 92-cooling input part, 92a-access pipe, 93-cooling input joint, 93a-input main connection Tube, 93b-output main branch pipe, 93c-output side branch pipe, 93e-inner support core, 93f-inner floating core, 93g-inner floating part, 93h-water inlet hole, 93i-water diversion hole, 94-cooling output joint, 95-connecting receiving part, 95a-middle support part, 95b-connecting part body, 95c-contact part, 95d-connecting edge, 95e-contact part body, 95f-contact slide groove, 96-cooling output part, 96a-discharge pipe. DETAILED DESCRIPTION

[0068] The following will be combined with the drawings in the embodiments of the present application to clearly describe the technical solutions in the embodiments of the present application. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. All other embodiments obtained by ordinary technicians in this field based on the embodiments in the present application belong to the scope of protection of this application.

[0069] Embodiment 1:

[0070] This embodiment provides a device for preparing a capacitor film, comprising:

[0071] A fixed frame 1, on which are provided a plurality of groups of equally spaced support frames;

[0072] A plurality of cooling rollers, each group of support frames is provided with a cooling roller, and the cooling roller is provided with a cooling inlet channel and a cooling outlet channel;

[0073] A cooling circuit system, including a plurality of cooling tanks 2, a plurality of cooling delivery pumps 3, and a plurality of coolers 4;

[0074] The number of cooling grooves 2 is equal to the number of cooling rollers, and a cooler 4 is arranged in each cooling groove 2; one side of the fixing frame 1 is the input side, and the other side is the output side. The temperature of the coolant input into the cooling roller increases gradually from the output side to the input side, and the coolant is discharged from the cooling roller near the output side and input into a cooling groove 2 for temporary storage or cooling, and then transported to the adjacent cooling roller near the input side through a cooling delivery pump 3.

[0075] The device also includes an external control cabinet, which is equipped with a control circuit and a controller, etc. A temperature detection device for detecting the surface temperature of the input film and a speed detector for detecting the passing speed of the film are arranged at the front of the input side of the device, and the temperature detection device feeds back the detected data to the controller. A transmission wheel is arranged on one side of each cooling roller to drive it to rotate, and the transmission wheel is driven to rotate through the transmission belt, the driving wheel and the transmission motor.

[0076] In this technical solution, the transmission motor, cooling delivery pump 3 and cooler 4 and other actuators are all programmed and controlled by the controller; each cooling tank 2 is provided with a temperature sensor, and the controller controls the start and stop and power of the cooler 4 according to the temperature detected by the temperature sensor. By detecting the surface temperature and transmission speed of the film input into the preparation device, the temperature and flow rate of the coolant passing through the cooling roller can be adjusted in time to ensure good cooling effect and efficiency.

[0077] At the same time, the temperature of the coolant input into each cooling roller is different, and the temperature decreases from the input side to the output side, that is, the temperature of the cooling tank 2 that transports the coolant into the corresponding cooling roller also decreases. This setting allows the film to be cooled step by step, and the temperature of the coolant in the cooling roller on the input side is higher, and the temperature difference with the film surface is smaller, and then it is gradually cooled through the subsequent cooling rollers, thereby increasing the cooling distance of the film while improving the cooling effect, and gradually cooling can reduce the impact on the quality of the film due to instantaneous cooling. The coolant that has been raised to a certain temperature from the cooling roller on the output side is used as the coolant source for the next cooling roller, so that the temperature of the coolant input into the next cooling roller can be better controlled to achieve the effect of step-by-step cooling, and under normal circumstances, only the cooler 4 in the cooling tank 2 that transports the coolant into the cooling roller on the output side works, as long as the remaining coolers 4 are started when the film conveying speed is increased, and the flow rate of the coolant is changed by changing the output power of the cooling delivery pump 3, thereby adjusting the cooling effect. The coolant discharged from the cooling roller on the output side is connected by a pipeline to the cooling tank 2 which provides the coolant for the cooling roller on the input side.

[0078] Embodiment 2:

[0079] This embodiment provides a device for preparing a capacitor film, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0080] The cooling roller includes:

[0081] The roller body 5 is in the shape of a ring column;

[0082] Two end roller shafts 6 are provided with covers and are respectively connected to the ends of the roller body 5, and cooling channels are formed thereon, wherein the cooling channel in the end roller shaft 6 at one end is a cooling inlet channel, and the cooling channel in the end roller shaft 6 at the other end is a cooling outlet channel;

[0083] A plurality of cooling plates 9, each having a plurality of annular cooling channels, and each of the cooling plates 9 is sequentially arranged in the roller body 5;

[0084] A cooling input pipe 7, one end of which is connected to the cooling channel of one of the end roller shafts 6, and the other end is formed with an input branch pipe connected to each cooling plate 9;

[0085] The cooling output pipe 8 has one end connected to the cooling channel of the roller shaft 6 at the other end, and the other end is formed with an output branch pipe connected to each cooling disk 9.

[0086] In the present technical solution, the outer wall of the roller body 5 is used to contact with the film for heat exchange, the end roller shaft 6 is used to support the cooling roller, and the cover can close the roller body 5. A rotating connector is provided at the port of the cooling channel, and the cooling roller is connected to the cooling circuit system through the rotating connector and the pipeline. The cooling plate 9 achieves cooling through the flow of the coolant in the cooling channel, and heat transfer is carried out through the contact between the cooling plate 9 and the inner wall of the roller body 5, and then the roller body 5 contacts the film to achieve the cooling effect. The effect and efficiency of heat exchange are changed by changing the flow rate of the coolant in the cooling channel. And by setting a number of annular cooling plates 9 and cooperating with the cooling input pipeline 7 and the cooling output pipeline 8, the cooling channels in adjacent cooling plates 9 are connected in parallel; it is ensured that the initial temperature of the coolant entering each cooling plate 9 is the same, so as to ensure that the cooling effect on different positions on the same horizontal coordinate of the film is the same, and there will be no situation where the temperature of the coolant gradually increases from the input end to the other end.

[0087] Embodiment 3:

[0088] This embodiment provides a device for preparing a capacitor film, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0089] The cooling plate 9 comprises:

[0090] A plurality of cooling receiving members 91, connected end to end and forming a ring structure with a notch;

[0091] A cooling input member 92 connected to a cooling receiving member 91 on one side of the notch;

[0092] A cooling output member 96, one side of which is connected to the cooling receiving member 91 on the other side of the notch, and the other side of which is connected and matched to the cooling input member 92;

[0093] A cooling input connector 93 connected to the cooling input member 92;

[0094] The cooling output connector 94 is connected to the cooling output member 96 .

[0095] A plurality of connecting receiving members 95 are respectively arranged between adjacent cooling receiving members 91 , between the cooling receiving member 91 and the cooling input member 92 , and between the cooling output member 96 and the cooling receiving member 91 .

[0096] In the present technical solution, a plurality of cooling receiving parts 91 form the main body of the cooling disk 9, the cooling access part is used to receive the coolant input into the cooling disk 9, and the cooling output part 96 is used to receive the coolant output from the cooling disk 9; the cooling input joint 93 is used to connect the cooling input part 92 with the input branch pipe, and the cooling output joint 94 is used to connect the cooling output part 96 with the output branch pipe; and the cooling input joint 93 has an input end and three output ends; the cooling output joint 94 has three input ends and one output end; and three cooling channels are formed in the cooling disk 9; the input end of the cooling input joint 93 is connected to the input branch pipe, and the three output ends are respectively connected to the inlet end of one of the cooling channels; the three input ends of the cooling output joint 94 are respectively connected to the outlet end of one of the cooling channels, and the output end is connected to the output branch pipe; the connecting receiving part 95 can ensure the overall sealing of the cooling disk 9.

[0097] Meanwhile, the cooling plate 9 is composed of a cooling receiving member 91, a cooling input member 92 and a cooling output member 96, which can be easily disassembled and maintained later. Meanwhile, a supporting plate without a cooling channel can be provided between adjacent cooling plates 9 for supporting and separating, so as to adjust the number of cooling plates 9 in the cooling roller, so as to be applied in other industries.

[0098] Embodiment 4:

[0099] This embodiment provides a device for preparing a capacitor film, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0100] The cooling receiving member 91, the cooling input member 92 and the cooling output member 96 all include:

[0101] The heat dissipation fin 9a has a fan-shaped cross section, and the outer wall is in contact with the inner wall of the roller body 5;

[0102] The main pipe joint 9b is integrally formed in the middle of the heat dissipation fin 9a;

[0103] Two side joints 9c are integrally formed on the heat dissipation fins 9a and are respectively located on both sides of the main pipe joint 9b;

[0104] The flow hole 9d, the main pipe joint 9b and the bypass joint 9c are all provided with a flow hole 9d penetrating the heat dissipation fins 9a, and the bypass joint 9c and the main pipe joint 9b can be inserted into the flow hole 9d.

[0105] The flow channel holes 9d in the cooling input part 92 and the cooling output part 96 are formed with a cut-off portion 9e that cuts off the flow channel holes 9d; the outer wall of each heat dissipation fin 9a is formed with a positioning groove 9f, and the inner wall of the roller body 5 is formed with a positioning rib that matches the positioning groove 9f; the cooling flow channel includes a main cooling flow channel and a side cooling flow channel; and the flow channel holes 9d on several main pipe joints 9b are connected end to end to form a main cooling channel, and the flow channel holes 9d on several side joints 9c on the same side are connected end to end to form a side cooling channel. The connecting parts 95 are respectively arranged at the connection between the flow channel hole 9d and the main pipe joint 9b and the side joint 9c.

[0106] In the present technical solution, the cooling receiving member 91, the cooling input member 92 and the cooling output member 96 are all made of metal or non-metallic materials with good thermal conductivity, such as high-purity silicon carbide or copper alloy. The heat dissipation fins 9a are arranged to contact the inner wall of the roller body 5, so as to achieve a good heat exchange effect. The arrangement of the main pipe joint 9b and the side joint 9c can ensure the stability of the connection between the adjacent cooling receiving member 91 or the cooling input member 92 and the cooling receiving member 91 or the cooling output member 96 and the cooling receiving member 91 or the cooling input member 92 and the cooling output member 96. And through the arrangement of the flow channel hole 9d, the flow channel holes 9d in the main pipe joints in the cooling receiving member 91, the cooling input member 92 and the cooling output member 96 are connected to form the main cooling channel, and the flow channel holes 9d in the side pipe joints in the cooling receiving member 91, the cooling input member 92 and the cooling output member 96 are connected to form the side cooling channel. The simultaneous operation of the three cooling channels can improve the efficiency and effect of heat exchange.

[0107] The connecting member 95 is arranged at the connection between the flow channel hole 9d and the main pipe joint 9b or the side joint 9c, so as to improve the sealing performance of the main cooling flow channel and the side cooling channel as a whole. The flow channel hole 9d in the cooling input member 92 and the cooling output member 96 is formed with a cut-off portion 9e for cutting off the flow channel hole 9d. The cut-off portion 9e allows the main cooling flow channel and the side cooling flow channel to form a one-way input and one-way output flow channel respectively, so as to ensure the overall heat exchange effect of the cooling disk 9.

[0108] The main pipe joint 9b and the bypass joint 9c on the cooling output member 96 are both provided with a threaded joint for adjusting the overall length of the main pipe joint 9b or the bypass joint 9c through threaded connection. When the cooling plate 9 is assembled, the main pipe joint 9b and the bypass joint 9c on the cooling output member 96 are not inserted into the flow channel hole 9d on the cooling input member 92. Then, by adjusting the threaded engagement, the threaded joint in the main pipe joint 9b or the bypass joint 9c on the cooling output member 96 is inserted into the flow channel hole 9d of the cooling input member 92, and the overall structure of the cooling plate 9 is reinforced, thereby ensuring the convenience and stability of the overall assembly of the cooling plate 9. The cut-off portion 9e in the cooling output member 96 is located near the port of the main pipe joint 9b or the bypass joint 9c, so as not to affect the connection of the threaded joint and the sealing of the cooling channel; the cut-off portion 9e in the cooling input member 92 is located near the bottom of the threaded joint connected to the flow channel hole 9d, so as not to affect the sealing of the cooling channel.

[0109] Embodiment 5:

[0110] This embodiment provides a device for preparing a capacitor film, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0111] The cooling input member 92 also includes:

[0112] Access pipe 92a, the cooling input member 92 is provided with three access pipes 92a respectively connected with the flow channel holes 9d, and the cooling input connector 93 is connected with the access pipe 92a;

[0113] The cooling output member 96 further includes:

[0114] Discharge pipe 96a: Three discharge pipes 96a are provided on the cooling output member 96 and are respectively connected to the flow channel holes 9d, and the cooling output connector 94 is connected to the discharge pipe 96a.

[0115] In the present technical solution, one end of the three access pipes 92a on the cooling input member 92 is respectively used to connect with the three output ends of the cooling input joint 93, and the other end is connected to the flow channel hole 9d in the main joint 9b or the bypass joint 9c thereon; and one end of the three discharge pipes 96a on the cooling output member 96 is respectively connected to the three input ends of the cooling output joint 94, and the other end is connected to the flow channel hole 9d in the main joint 9b or the bypass joint 9c thereon; thereby ensuring a good flow effect of the coolant in the cooling disk 9.

[0116] Embodiment 6:

[0117] This embodiment provides a device for preparing a capacitor film, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0118] The connecting member 95 comprises:

[0119] A joint connector, provided at the end of the main joint 9b or the side joint 9c;

[0120] The hole contact piece is arranged in one end of the flow channel hole 9d away from the main pipe joint 9b or the bypass joint 9c;

[0121] The middle support member 95a is arranged on the hole contact member;

[0122] The joint connector and the hole contact member are sealed and matched, and the middle support member 95a is pressed between the joint connector and the hole contact member.

[0123] In this technical solution, the joint connector is sleeved on the end of the main joint 9b or the bypass joint 9c, and the hole contact piece is arranged in the flow channel hole 9d, so that the sealing of the connection can be ensured when the main joint 9b or the bypass joint 9c is inserted into the flow channel hole 9d; and the setting of the middle support piece 95a can improve the sealing performance of the contact between the joint connector and the hole contact piece. The joint connector, the hole contact piece and the middle support piece 95a can all be made of sealing rubber.

[0124] Embodiment 7:

[0125] This embodiment provides a device for preparing a capacitor film, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0126] Connector parts include:

[0127] The connector body 95b is annular and has a contact portion 95c formed at one end. The outer wall of the contact portion 95c is a conical surface with a decreasing diameter from the connector body 95b outwards.

[0128] The connecting edge 95d has an outer diameter greater than the connecting member body 95b and is integrally formed at an end of the connecting member body 95b away from the contact portion 95c;

[0129] Hole contacts include:

[0130] The contact body 95e is annular, and one end of the inner wall is formed with a contact surface that cooperates with the contact portion 95c;

[0131] A contact groove 95f is formed on the inner wall of the contact body 95e and at the other end away from the contact surface;

[0132] The connecting edge 95d can be slidably matched with the contact slide groove, and the middle support member 95a is arranged on the contact slide groove 95f and can be pressed between the end surface of the connecting edge 95d and the end surface of the contact slide groove 95f.

[0133] In the present technical solution, the connector body 95b of the connector connector is sleeved on the port of the main connector 9b or the bypass connector 9c, and the outer wall of the main connector 9b or the bypass connector 9c is formed with an annular placement groove; the connecting edge 95d is against the bottom of the placement groove; the contact body 95e in the hole contact piece is arranged in the flow channel hole 9d, and in order to ensure the stability of the placement of the hole contact piece, the flow channel hole 9d is far away from the main connector 9b or the bypass connector 9c. The end of the hole contact piece is formed inwardly with a support groove, and the hole contact piece is arranged on the contact piece; and because the contact portion 95c on the connector body 95b is a conical surface with a decreasing cross section , and contacts with the contact surface on the contact body 95e, so that the contact portion 95c and the contact surface are more closely attached during the squeezing process of the connector body 95b and the contact body 95e, thereby improving the sealing of the connection between the main connector 9b or the bypass connector 9c and the flow channel hole 9d; and the contact groove 95f is used to accommodate the middle support member 95a, and at the same time, it is against the contact groove 95f and the connecting edge 95d during the close cooperation between the connector connector and the hole contact member, thereby further improving the sealing between the connector connector and the hole contact member, so as to ensure the overall sealing effect of the cooling plate 9.

[0134] Embodiment 8:

[0135] This embodiment provides a device for preparing a capacitor film, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0136] The cooling input connector 93 includes:

[0137] Input main pipe 93a, used to connect with input branch pipe;

[0138] The output main branch pipe 93b is coaxially arranged with the input main pipe 93a and communicated with the input main pipe 93a;

[0139] Two output side branch pipes 93c are respectively arranged on both sides of the input main pipe 93a and can be communicated with the input main pipe 93a;

[0140] The switching adjustment member is disposed in the input main pipe 93a and can be used to connect the input main pipe 93a with the output side branch pipe 93c.

[0141] In the present technical solution, the input main pipe 93a is connected to the input branch pipe, and one end of the input main branch pipe is connected to the input main connecting pipe, and the other end is connected to the flow channel hole 9d in the main pipe joint 9b of the input cooling member; one end of the two output side branch pipes 93c can be connected to the input main pipe, and the other end is connected to the flow channel hole 9d in the side joints 9c on both sides of the cooling output member 96; and the switching regulating member is adjusted under the water pressure of the coolant to control whether the output side branch pipe 93c is connected to the input main pipe 93a. When the temperature of the film passing through the cooling roller is not high, it is only necessary to control the hydraulic pressure to keep the connection between the input main pipe 93a and the output main branch pipe 93b, so that the coolant only enters the main cooling channel; when the film temperature is high or the film passing speed is fast, the water pressure of the coolant is adjusted by changing the output power of the cooling delivery pump 3, driving the switching regulating member to operate so that the input main pipe 93a is connected to the output side branch pipe 93c, so that the coolant enters the two side cooling channels, and heat is exchanged through the three cooling channels at the same time, which greatly improves the heat exchange and cooling effect of the cooling plate 9.

[0142] Embodiment 9:

[0143] This embodiment provides a device for preparing a capacitor film, which, in addition to the technical solutions of the above embodiments, also has the following technical features.

[0144] The switching adjustment includes:

[0145] The inner support core 93e is annular and cylindrical and is limited in the input main pipe 93a;

[0146] The inner floating core 93f is slidably disposed in the inner supporting core 93e, and a water inlet hole 93h is coaxially disposed on the inner floating core 93f, and a plurality of water diversion holes 93i are formed on the outer wall that can extend out of the inner supporting core 93e and communicate with the output side branch pipe 93c;

[0147] The inner floating member 93g is disposed between the inner supporting core 93e and the inner floating core 93f, and enables the inner floating core 93f to be slidably disposed in the inner supporting core 93e;

[0148] The end of the inner floating core 93f extends out of the inner supporting core 93e, passes through the connection between the input main pipe 93a and the output side branch pipe 93c and is inserted into the output main branch pipe 93b, and the end of the inner floating core 93f slides with the output main branch pipe 93b; the water inlet hole 93h includes a water inlet part, a force-bearing part and a water outlet part with decreasing diameters and connected in sequence, and the water inlet part and the water outlet part are both cylindrical, the force-bearing part is conical, and the water diversion hole 93i is connected to the water inlet part; under normal conditions, the water diversion hole 93i is located in the inner supporting core 93e; and the inner floating part 93g can be a buffer spring.

[0149] In the present technical solution, the inner support core 93e is used to support the entire switching adjustment component, so that the switching adjustment component can be fixed in the input main pipe 93a; and the inner floating core 93f maintains the connection between the input main pipe 93a and the output main branch pipe 93b under the support of the inner floating component 93g; when the water pressure increases and passes through the water inlet hole 93h, the pressure on the inner floating core 93f will increase due to the force on the conical surface with decreasing diameter, thereby driving the inner floating core 93f to move toward the output main branch pipe 93b, so that the part of the inner floating core 93f with the water diversion hole 93i slides out of the inner support core 93e, and then allows the coolant to enter the output side branch pipe 93c through the water diversion hole 93i, so as to realize the connection between the input main pipe 93a and the output side branch pipe 93c under high pressure.

[0150] Embodiment 10:

[0151] This embodiment provides a method for preparing a capacitor film using the technical solution of the above embodiment.

[0152] include:

[0153] Step 1: Extrusion and modification: polypropylene is extruded through an extruder to form a billet;

[0154] Step 2: stretching: heating the blank and then stretching the blank through a stretching device to form a film blank;

[0155] Step 3: Cooling: The film blank is cooled in multiple stages by a preparation device;

[0156] Step 4: annealing, annealing the cooled film blank to obtain a base film;

[0157] Step 5: Surface treatment: cleaning, drying and corona discharge treatment of the base film;

[0158] Step 6: Plating: sending the base film into a vacuum coating machine, vapor-depositing the corona surface of the base film to form a metal coating to obtain a capacitor film.

[0159] In the technical solution, by using the above-mentioned device to cool the film blank, the cooling effect in the production process of the capacitor film can be guaranteed, the production cycle can be shortened, and the quality of the produced capacitor film can be guaranteed. The embodiments of the present application are described above in conjunction with the accompanying drawings. In the absence of conflict, the embodiments and features in the embodiments of the present application can be combined with each other. The present application is not limited to the above-mentioned specific implementation methods. The above-mentioned specific implementation methods are only illustrative and not restrictive. Under the enlightenment of the present application, ordinary technicians in this field can also make many forms without departing from the purpose of the present application and the scope of protection of the claims, all of which belong to the protection of the present application.

Claims

1. A device for preparing a capacitor film, characterized in that: include: A fixed frame (1) having a plurality of groups of equally spaced support frames; Several cooling rollers, each set of support frames is provided with a cooling roller; A cooling circuit system, comprising a plurality of cooling tanks (2), a plurality of cooling delivery pumps (3), and a plurality of coolers (4); The number of cooling grooves (2) is equal to the number of cooling rollers, and a cooler (4) is provided in each cooling groove (2); one side of the fixed frame (1) is an input side, and the other side is an output side; the temperature of the cooling liquid input into the cooling rollers increases gradually from the output side to the input side, and the cooling liquid discharged from the cooling rollers on the output side is input into a cooling groove (2) and then transported to the adjacent cooling rollers on the input side through a cooling transport pump (3); The cooling roller comprises: The roller body (5) is in the shape of a ring column; A plurality of cooling plates (9) having cooling channels thereon and arranged in sequence in the roller body (5); The cooling plate (9) comprises: A plurality of cooling receiving parts (91) connected end to end and forming a ring structure with a notch; A cooling input member (92) connected to a cooling receiving member (91) at one side of the notch; A cooling output member (96) is connected to the cooling receiving member (91) on the other side of the notch and is connected and matched with the cooling input member (92); A cooling input connector (93) connected to the cooling input member (92); A cooling output connector (94) connected to a cooling output member (96); A plurality of connecting receiving parts (95), respectively arranged between adjacent cooling receiving parts (91), between the cooling receiving part (91) and the cooling input part (92), and between the cooling output part (96) and the cooling receiving part (91); The cooling receiving member (91), the cooling input member (92) and the cooling output member (96) all include: The heat dissipation fin (9a) has a fan-shaped cross section and an outer wall that fits in contact with the inner wall of the roller body (5); A main pipe joint (9b) is integrally formed in the middle of the heat dissipation fin (9a); Two side joints (9c) are integrally formed on the heat dissipation fins (9a) and are respectively located on both sides of the main pipe joint (9b); A flow channel hole (9d), wherein the main pipe joint (9b) and the side joint (9c) are both provided with a flow channel hole (9d) penetrating the heat dissipation fin (9a), and the side joint (9c) and the main pipe joint (9b) can both be inserted into the flow channel hole (9d); The flow channel holes (9d) in the cooling input member (92) and the cooling output member (96) are each formed with a cut-off portion (9e) that cuts off the flow channel hole (9d); a positioning groove (9f) is formed on the outer wall of each heat dissipation fin (9a); and a positioning rib that cooperates with the positioning groove (9f) is formed on the inner wall of the roller body (5); and the connecting member (95) is arranged at the connection between the flow channel hole (9d) and the main pipe joint (9b) or the side joint (9c).

2. The device for preparing a capacitor film according to claim 1, characterized in that: The cooling roller further comprises: Two end roller shafts (6) are provided with covers and are respectively connected to the ends of the roller body (5), and cooling channels are formed thereon; A cooling input pipe (7) connected to a cooling channel of one of the end roller shafts (6) and formed with an input branch pipe connected to each cooling plate (9); The cooling output pipe (8) is connected to the cooling channel of the other end roller shaft (6), and is formed with an output branch pipe connected to each cooling plate (9).

3. The device for preparing a capacitor film according to claim 2, characterized in that: The connecting member (95) comprises: A joint connection piece, arranged at the end of the main pipe joint (9b) or the side joint (9c); A hole contact piece is arranged in one end of the flow channel hole (9d) away from the main pipe joint (9b) or the side joint (9c); A middle support member (95a) is arranged on the hole contact member; The joint connecting piece and the hole contact piece are sealed and matched, and the middle supporting piece (95a) is pressed between the joint connecting piece and the hole contact piece.

4. The device for preparing a capacitor film according to claim 3, characterized in that: The joint connector comprises: The connecting piece body (95b) is annular and has a contact portion (95c) formed at one end, wherein the outer wall of the contact portion (95c) is a conical surface with a decreasing diameter from the connecting piece body (95b) outwards; A connecting edge (95d) having an outer diameter greater than that of the connecting piece body (95b) and being integrally formed at an end of the connecting piece body (95b) away from the contact portion (95c); The hole contact member comprises: The contact piece body (95e) is annular, and one end of the inner wall is formed with a contact surface that matches the contact portion (95c); A contact groove (95f) formed on the inner wall of the contact member body (95e) and at the other end away from the contact surface; The connecting edge (95d) can be slidably matched with the contact slide groove (95f), and the middle support member (95a) is arranged on the contact slide groove (95f) and can be pressed between the end surface of the connecting edge (95d) and the end surface of the contact slide groove (95f).

5. The device for preparing a capacitor film according to claim 4, characterized in that: The cooling input connector (93) comprises: An input main pipe (93a) is used to connect to an input branch pipe; An output main branch pipe (93b) is coaxially arranged with the input main pipe (93a) and communicates with the input main pipe (93a); Two output side branch pipes (93c) are respectively arranged on both sides of the output main branch pipe (93b) and can be communicated with the input main pipe (93a); The switching adjustment member is arranged in the input main pipe (93a) and can be used to connect the input main pipe (93a) with the output side branch pipe (93c).

6. A method for preparing a capacitor film using the device for preparing the capacitor film according to any one of claims 1 to 5, characterized in that: include: Step 1: Extrusion and modification: polypropylene is extruded through an extruder to form a billet; Step 2: stretching: heating the blank and then stretching the blank through a stretching device to form a film blank; Step 3: Cooling: The film blank is cooled in multiple stages by a preparation device; Step 4: annealing, annealing the cooled film blank to obtain a base film; Step 5: Surface treatment: cleaning, drying and corona discharge treatment of the base film; Step 6: Plating: sending the base film into a vacuum coating machine, vapor-depositing the corona surface of the base film to form a metal coating to obtain a capacitor film.

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