A permanent magnet mechanism with portable adjustable closing and opening times

Abstract

A permanent magnet mechanism with portable adjustable closing and opening times, comprising a permanent magnet mechanism body and a pull rod, a moving iron core, a coil, a permanent magnet, an adjustment mechanism, a cooling mechanism, a shock-absorbing ring and a sealing mechanism arranged inside the permanent magnet mechanism body. Inside the permanent magnet mechanism body, there are a coil fixing cavity, a cooling cavity and a permanent magnet fixing cavity. The pull rod passes through the permanent magnet mechanism body and is connected to the moving iron core. The coil is placed in the coil fixing cavity. The cooling mechanism is placed in the cooling cavity and is arranged adjacent to the coil. The shock-absorbing ring is fixed inside the permanent magnet mechanism body, and the shock-absorbing ring is located between the permanent magnet mechanism body and the moving iron core. One end of the sealing mechanism is fixedly connected to the permanent magnet mechanism body, and the other end is fixedly connected to the upper end of the pull rod. In the present invention, the adjustment mechanism is used to adjust the closing time and opening time of the permanent magnet mechanism, and make the multiple actions of the circuit breaker have good synchronism. The cooling mechanism can reduce the aging problem of the coil insulating material caused by high temperature.

Description

Technical Field

[0001] The present invention relates to the technical field of permanent magnet mechanisms, and particularly to a portable permanent magnet mechanism with adjustable opening and closing times. Background Art

[0002] In the field of intelligent distribution networks, fast protection circuit breakers are widely used. The reason is that the distribution network lines can be segmented and demarcated, and during a fault, relying on the protection time grade difference cooperation, the power outage range can be controlled to the minimum. This requires the accurate judgment of the circuit breaker protection system and the reliable quick-acting performance of the circuit breaker operating mechanism. While achieving the time grade difference cooperation of the circuit breaker protection action, in order to ensure the quick-acting performance of the line quick-break protection, it is generally required that the circuit breaker protection tripping time is not greater than 40 ms.

[0003] Traditional permanent magnet circuit breakers are restricted by the one-drive-three transmission structure, resulting in a long action buffer time and large output dispersion. When cooperating with the protection outlet, the general fault removal time is greater than 60 ms. There are also circuit breakers driven by single-phase permanent magnet mechanisms, that is, each phase of the circuit breaker is equipped with a permanent magnet mechanism. This structure has fewer transmission links and can reduce the protection tripping time, but it is difficult to ensure the synchronization of the three-phase actions of the circuit breaker (the absolute value of the difference between the first-opening phase and the last-opening phase of the circuit breaker is less than 2 ms). As mentioned in a prior publicly disclosed patent for a permanent magnet mechanism with adjustable opening and closing times (publication number CN104821262B), by adding a limiting mechanism to each permanent magnet mechanism, precise adjustment of the compression amount of the opening spring is achieved, thereby controlling the action time of each permanent magnet mechanism and ensuring good synchronization of the protection tripping times of each permanent magnet mechanism.

[0004] However, there are still certain problems in this structure: during long-term use, the threaded steel sleeve and the locking nut may become loose due to vibration factors. Once the threads become loose, the compression amount of the opening spring will change, thereby affecting the action time of the permanent magnet mechanism and destroying the synchronization of each permanent magnet mechanism. Moreover, factors such as temperature, humidity, and vibration in the working environment of the coil will also affect the stability of the coil. High temperature may cause the aging of the coil insulation material, and severe vibration may cause micro-cracks inside the coil, all of which may reduce the stability of the coil. Therefore, a permanent magnet mechanism is needed to solve the above problems. Summary of the Invention

[0005] The purpose of the present invention is to provide a portable permanent magnet mechanism with adjustable opening and closing times, which solves the problems that the threads of the above permanent magnet mechanism may become loose due to vibration and the coil becomes unstable due to temperature and humidity.

[0006] To achieve the above object, the present invention provides a permanent magnet mechanism with portable adjustable closing and opening times, comprising a permanent magnet mechanism body and a pull rod, a moving iron core, a coil, a permanent magnet, an adjusting mechanism, a cooling mechanism, a shock-absorbing ring and a sealing mechanism arranged inside the permanent magnet mechanism body;

[0007] Inside the permanent magnet mechanism body, there are a coil fixing cavity, a cooling cavity and a permanent magnet fixing cavity. The pull rod passes through the permanent magnet mechanism body and is connected to the moving iron core. The coil is placed in the coil fixing cavity. The cooling mechanism is placed in the cooling cavity and is arranged adjacent to the coil. The shock-absorbing ring is fixed inside the permanent magnet mechanism body and is located between the permanent magnet mechanism body and the moving iron core. One end of the sealing mechanism is fixedly connected to the permanent magnet mechanism body, and the other end is fixedly connected to the upper end of the pull rod. The adjusting mechanism is used to adjust the relative position of the pull rod and the moving iron core. The cooling mechanism is used to cool the coil. The shock-absorbing ring is used to reduce the impact force of the moving iron core on the permanent magnet mechanism body during closing. The sealing mechanism is used to seal the permanent magnet mechanism body to prevent water vapor or dust from entering the permanent magnet mechanism body;

[0008] The adjusting mechanism includes a contact spring, a tripping spring, an iron core rear cover, an adjusting nut and a locking nut. The iron core rear cover is threadedly connected to the lower end of the moving iron core. The contact spring passes through the pull rod, and one end of the contact spring abuts against the upper end of the pull rod, and the other end abuts against the iron core rear cover. The tripping spring passes through the pull rod and is located outside the contact spring. One end of the tripping spring abuts against the inner wall surface of the permanent magnet mechanism body, and the other end abuts against the iron core rear cover. The lower end of the pull rod passes through the iron core rear cover. The adjusting nut is threadedly connected to the lower end of the pull rod and abuts against the outside of the iron core rear cover. The locking nut is threadedly connected to the lower end of the pull rod and abuts against the adjusting nut.

[0009] Preferably, the cooling mechanism includes a connecting spring, a rhombic expansion airbag and cooling inserts. The rhombic expansion airbag is located in the cooling cavity. The connecting spring is fixedly connected to the upper and lower ends of the rhombic expansion airbag respectively, and the connecting spring abuts against the inner wall surface of the cooling cavity. The cooling inserts are arranged at intervals inside the rhombic expansion airbag;

[0010] On one side of the cooling cavity away from the coil fixing cavity, there is a ventilation opening. The other side of the cooling cavity is communicated with the coil fixing cavity. On the side of the coil fixing cavity away from the cooling cavity, there are a plurality of one-way air outlets.

[0011] Preferably, both sides of the rhombic expansion airbag are provided with openings. One opening abuts against the ventilation opening, and the other opening faces the coil. A plurality of heat dissipation holes are provided at the upper and lower ends of the rhombic expansion airbag.

[0012] Preferably, a plurality of circulation holes are provided on the cooling inserts. One end of the cooling insert is fixedly connected to the rhombic expansion airbag, and the end face of the other end exceeds the middle dividing surface of the rhombic expansion airbag.

[0013] Preferably, the sealing mechanism includes an upper elastic sealing ring and a lower connecting sealing ring, one end of the upper elastic sealing ring is fixedly connected to the permanent magnet mechanism body, and the other end is fixedly connected to the upper end of the pull rod, and one end of the lower connecting sealing ring is fixedly connected to the permanent magnet mechanism body, and the other end is abutted against the lower end of the pull rod.

[0014] Preferably, the upper elastic sealing ring comprises a fixing area, an elastic area and a pressing area which are connected to each other, the pressing area is fixedly connected to the permanent magnet mechanism body, a protrusion is provided on the upper end of the pull rod, and the protrusion clamps the fixing area with the contact spring.

[0015] Preferably, the lower connecting sealing ring includes a ring body, a first rib, a second rib and a pressure wing. The ring body is fixedly connected to the lower end of the permanent magnet mechanism body. An opening is provided at the lower end of the permanent magnet mechanism body. The first rib is fixedly connected to the ring body and is located at the opening. The pressure wing is connected to the ring body and is sleeved on the lower end of the pull rod. The second rib is located at the connection between the pressure wing and the ring body.

[0016] Preferably, the pressing wing comprises a first wing, a second wing and an adjustment groove, the first wing and the second wing are arranged in parallel and an isolation cavity is formed therebetween, and the adjustment groove is spaced apart from the isolation cavity;

[0017] The first wing and the second wing are respectively connected to the lower end of the pull rod and bent toward the bottom of the pull rod. The contact surface between the first wing and the pull rod is a hemispherical surface, and the contact surface between the second wing and the pull rod is a conical surface.

[0018] Preferably, the shock-absorbing ring includes a connecting part, a deformation part and a connecting rib, the connecting part is connected to the deformation part, and the connecting part is fixedly connected to the permanent magnet mechanism body, the cross-section of the deformation part is a hollow ellipse, the connecting rib is arranged at the middle end of the deformation part, and the deformation part is connected to the moving iron core.

[0019] Preferably, a positioning pin is provided on the inner upper wall surface of the permanent magnet mechanism body, and a pin hole corresponding to the positioning pin is provided on the moving iron core, and the positioning pin is inserted into the pin hole.

[0020] Beneficial effects of the present invention:

[0021] 1. The present invention adjusts the closing time and the opening time by adjusting the permanent magnetic mechanism. By adjusting each permanent magnetic mechanism to have the same action time, it ensures that the three-phase closing and opening of the circuit breaker have good synchronization, and also effectively reduces the protection opening time. The cooling mechanism can cool the coil, reduce the aging problem of the coil insulation material that may be caused by high temperature, reduce the frequency of the coil needing to be replaced due to aging, and reduce the material cost. Furthermore, the sealing mechanism prevents water vapor or dust from entering the permanent magnetic mechanism body, reduces the equipment failure rate caused by water vapor or dust, and thus does not need to frequently repair equipment damaged by external factors.

[0022] 2. The cooling mechanism of the present invention adopts a combination of a rhombus telescopic airbag, a connecting spring, and a cooling insert, and realizes the cooling of the coil in cooperation with the design of the ventilation port and the one-way air outlet, which can more effectively cope with various adverse factors in the working environment of the coil, such as temperature changes. Based on the internal space of the permanent magnet mechanism and the working characteristics of the coil, the cooling mechanism can be well integrated into the permanent magnet mechanism, and can effectively cool the coil without affecting the normal operation of other components, meeting the space and function requirements in actual production.

[0023] 3. The sealing mechanism of the present invention provides a stable sealing environment for the permanent magnet mechanism, which can ensure the sealing performance of the mechanism, reduce the failures of the permanent magnet mechanism caused by sealing-related problems (such as the intrusion of external factors affecting the internal structure), and enable the permanent magnet mechanism to operate more stably. For the coil in the permanent magnet mechanism, this kind of sealing can reduce the influence of external factors such as temperature, humidity, and vibration on its stability, and enable the coil to operate more stably.

[0024] 4. When the moving iron core closes, the shock-absorbing ring of the present invention can effectively reduce the impact of the moving iron core on the main body and the pull rod of the permanent magnet mechanism, avoiding the loosening of the screws after being impacted. The elliptical deformation part can better disperse the impact force, and the connecting rib can also provide a restoring support force after the deformation part deforms. And by setting the positioning pin, it can effectively prevent the moving iron core from rotating during the opening and closing processes, resulting in the loosening of the adjusting nut and the locking nut, making the opening and closing of the mechanism more stable and fast. Brief Description of the Drawings

[0025] In order to more clearly illustrate the technical solutions in the embodiments of the present application or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art.

[0026] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention.

[0027] Figure 2 It is a schematic diagram of the positional structure of the cooling mechanism and the coil of the present invention.

[0028] Figure 3 It is Figure 1 The enlarged view of part A in

[0029] Figure 4 It is Figure 1 The enlarged view of part B in

[0030] In the figure: permanent magnet mechanism body 1; coil fixing cavity 11; one-way air outlet 111; cooling cavity 12; ventilation opening 121; permanent magnet fixing cavity 13; positioning pin 14; pull rod 2; protrusion 21; moving iron core 3; pin hole 31; coil 4; permanent magnet 5; adjusting mechanism 6; contact spring 61; opening spring 62; iron core rear cover 63; adjusting nut 64; locking nut 65; cooling mechanism 7; connecting spring 71; rhombic expansion airbag 72; heat dissipation hole 721; cooling insert 73; through hole 731; shock absorption ring 8; connecting part 81; deformation part 82; connecting rib 83; sealing mechanism 9; upper elastic sealing ring 91; fixing area 911; elastic area 912; pressing area 913; lower connecting sealing ring 92; ring body 921; first rib 922; second rib 923; pressing wing 924; first wing 9241; second wing 9242; adjusting groove 9243. Specific embodiments

[0031] The embodiments of the present invention will be described in detail below. The examples of the embodiments are shown in the drawings. The embodiments described below by referring to the drawings are exemplary and are intended to explain the present invention, and should not be construed as limiting the present invention.

[0032] As Figure 1 shown, a permanent magnet mechanism with portable adjustable opening and closing times includes a permanent magnet mechanism body 1, as well as a pull rod 2, a moving iron core 3, a coil 4, a permanent magnet 5, an adjusting mechanism 6, a cooling mechanism 7, a shock absorption ring 8, and a sealing mechanism 9 arranged inside the permanent magnet mechanism body 1.

[0033] The permanent magnet mechanism body 1 is internally provided with a coil fixing cavity 11, a cooling cavity 12, and a permanent magnet fixing cavity 13. The pull rod 2 passes through the permanent magnet 5 mechanism body and is connected to the moving iron core 3. The coil 4 is placed in the coil fixing cavity 11. The cooling mechanism 7 is placed in the cooling cavity 12 and is arranged adjacent to the coil 4. The shock absorption ring 8 is fixed inside the permanent magnet mechanism body 1, and the shock absorption ring 8 is located between the permanent magnet mechanism body 1 and the moving iron core 3. One end of the sealing mechanism 9 is fixedly connected to the permanent magnet mechanism body 1, and the other end is fixedly connected to the upper end of the pull rod 2. The adjusting mechanism 6 is used to adjust the relative position between the pull rod 2 and the moving iron core 3. The cooling mechanism 7 is used to cool the coil 4. The shock absorption ring 8 is used to reduce the impact force of the moving iron core 3 on the permanent magnet mechanism body 1 during closing. The sealing mechanism 9 is used to seal the permanent magnet mechanism body 1 to prevent moisture or dust from entering the permanent magnet mechanism body 1.

[0034] The adjustment mechanism 6 includes a contact spring 61, a disconnecting spring 62, a core back cover 63, an adjusting nut 64 and a locking nut 65. The core back cover 63 is connected to the lower end of the moving iron core 3. The contact spring 61 passes through the pull rod 2, and one end of the contact spring 61 is abutted against the upper end of the pull rod 2, and the other end is abutted against the core back cover 63. The disconnecting spring 62 passes through the pull rod 2 and is located on the outside of the contact spring 61. One end of the disconnecting spring 62 is abutted against the inner wall surface of the permanent magnet mechanism body 1, and the other end is abutted against the core back cover 63. The lower end of the pull rod 2 passes through the core back cover 63. The adjusting nut 64 is meshed with the lower end of the pull rod 2 and abutted against one end of the core back cover 63 away from the disconnecting spring 62. The locking nut 65 is meshed with the lower end of the pull rod 2 and abutted against the adjusting nut 64. The present invention optimizes the internal structure and reduces unnecessary components to make the overall structure more compact, and designs each mechanism of the permanent magnet mechanism as a modular component, which is convenient for rapid assembly and disassembly. The present invention adjusts the closing time and opening time of the permanent magnet mechanism through the adjustment mechanism 6 to adjust the action time of each permanent magnet mechanism, and makes the multiple actions of the circuit breaker have good synchronization, while achieving the purpose of effectively reducing the protection opening time. The cooling mechanism 7 is aimed at the temperature problem in the working environment of the coil 4, the shock-absorbing ring 8 solves the problem of closing impact force, and the sealing mechanism 9 responds to the problem of water vapor and dust entering. In addition, the settings of the cooling mechanism 7, the shock-absorbing ring 8 and the sealing mechanism 9 are relatively independent and have clear functions. During the operation of the equipment, if there is a problem with any of the components, it is also convenient to carry out independent and rapid maintenance and replacement, which is more convenient to use.

[0035] like Figure 2As shown in the figure, the cooling mechanism 7 includes a connecting spring 71, a rhombic expansion airbag 72, and cooling inserts 73. The rhombic expansion airbag 72 is located inside the cooling chamber 12. The connecting spring 71 is fixedly connected to the upper and lower ends of the rhombic expansion airbag 72 respectively, and the connecting spring 71 abuts against the inner wall surface of the cooling chamber 12. The cooling inserts 73 are arranged at intervals inside the rhombic expansion airbag 72. A ventilation port 121 is provided on one side of the cooling chamber 12 away from the coil fixing chamber 11, and the other side of the cooling chamber 12 is communicated with the coil fixing chamber 11. A plurality of one-way air outlets 111 are provided on the side of the coil fixing chamber 11 away from the cooling chamber 12. The structure of the cooling mechanism 7 adopts a combination of the rhombic expansion airbag 72, the connecting spring 71, and the cooling inserts 73, and realizes the cooling of the coil 4 in cooperation with the design of the ventilation port 121 and the one-way air outlet 111, and can more effectively cope with various adverse factors in the working environment of the coil 4, such as temperature changes. Based on the internal space of the permanent magnet mechanism and the working characteristics of the coil 4, the cooling mechanism 7 can be well integrated into the permanent magnet mechanism, and can effectively cool the coil 4 without affecting the normal operation of other components, meeting the space and function requirements in actual production. At least one of the connecting springs 71 of the present invention is made of a shape memory alloy and can automatically sense the temperature change in the mechanism. When the coil 4 generates serious heat during operation, it can automatically compress the rhombic expansion airbag 72. After the rhombic expansion airbag 72 is compressed, it will cause a change in the air pressure space, and exhale air to the ventilation port 121 and the coil fixing chamber 11. The relatively cold air outside the cooling chamber 12 and the relatively hot air inside the coil fixing chamber 11 flow and mix in the cooling chamber 12 to cool down, and under pressure, the hot air inside the coil fixing chamber 11 is discharged from the one-way air outlet 111, avoiding the continuous temperature rise of the coil 4, which is beneficial to reducing the aging problem of the insulating material of the coil 4 caused by high temperature, reducing the frequency of replacement of the coil 4 due to aging, and reducing the material cost.

[0036] Furthermore, openings are provided on both sides of the rhombic telescopic airbag 72. One opening on one side of the rhombic telescopic airbag 72 abuts and connects with the ventilation opening 121, and the other opening faces the coil 4. A plurality of heat dissipation holes 721 are provided at the upper and lower ends of the rhombic telescopic airbag 72. When the rhombic telescopic airbag 72 is compressed, the original air in the airbag will be output to the openings and the heat dissipation holes 721. The rhombic telescopic airbag 72 of the present invention is made of silica gel, and silica gel is a material with a porous structure. It has strong adsorption performance and can adsorb moisture and other small molecules. Due to its porous structure, energy absorption will occur during moisture absorption, so the air temperature in the airbag is relatively low. When the rhombic telescopic airbag 72 outputs air, part of the air will cool the spring along the heat dissipation holes 721 at the upper and lower ends; and after the spring is cooled, it will retract and drive the airbag to reset. When the airbag resets, it will inhale the ventilation opening 121 and the coil fixing cavity 11, and the relatively hot air that has been cooled once in the coil fixing cavity 11 will be inhaled into the airbag. The cooling inserts 73 divide the silica gel into multiple barrier zones, and the flowing air will be cooled by the cooling inserts 73 and the silica gel when entering the airbag again, taking away part of the temperature, thereby reducing the temperature.

[0037] Still further, a plurality of circulation holes 731 are provided on the cooling insert 73. One end of the cooling insert 73 is fixedly connected to the rhombic telescopic airbag 72, and the end surface of the other end exceeds the middle dividing surface of the rhombic telescopic airbag 72. Through the circulation holes 731, the heat of the flowing air inside the airbag can be better exchanged. And the end surface of the cooling insert 73 exceeding the middle dividing surface of the rhombic telescopic airbag 72 can better divide the inside of the airbag into multiple regions, increasing the friction of the air and accelerating the cooling.

[0038] In one embodiment, the connecting spring 71 of the present invention can be electrically connected. By energizing and heating the connecting spring 71, and through the system equipped with detection equipment, the telescopic movement of the spring can be automatically controlled to realize the control of the airbag.

[0039] In one embodiment, one of the connecting springs 71 at the upper and lower ends of the rhombic telescopic airbag 72 of the present invention is a memory spring, and the other is a support spring. By energizing and heating the memory spring, its extension degree is changed, and the airbag can be supported by the support spring, which can accelerate the retraction speed of the memory spring after the power is cut off.

[0040] In one embodiment, the present invention includes a support spring and a memory spring. The memory spring is sleeved outside the support spring. After the memory spring is heated and expanded, it can compress the rhombic telescopic airbag 72 and at the same time drive the support spring to expand. After the temperature drops, the pulling force of the support spring is greater than the extension force of the memory spring, which will pull the airbag to retract, realizing the control of the airbag.

[0041] Refer to Figure 1The sealing mechanism 9 includes an upper elastic sealing ring 91 and a lower connecting sealing ring 92. One end of the upper elastic sealing ring 91 is fixedly connected to the permanent magnet mechanism body 1, and the other end is fixedly connected to the upper end of the pull rod 2. One end of the lower connecting sealing ring 92 is fixedly connected to the permanent magnet 5 mechanism body, and the other end is abutted against the lower end of the pull rod 2. The sealing mechanism 9 of the present invention provides a stable sealing environment for the permanent magnet mechanism, so that the permanent magnet mechanism can operate more stably. For the coil 4 in the permanent magnet mechanism, this sealing can reduce the influence of external factors such as temperature, humidity and vibration on its stability, so that the coil 4 can operate more stably.

[0042] like Figure 3 As shown, the upper elastic sealing ring 91 includes a fixed area 911, an elastic area 912 and a pressing area 913 which are connected to each other. The fixed area 911 is fixedly connected to the permanent magnet 5 mechanism body. A protrusion 21 is provided on the upper end of the pull rod 2. The protrusion 21 and the contact spring 61 clamp the fixed area 911. The connection between the fixed area 911 and the pressing area 913 can ensure the sealing of the mechanism and reduce the failure of the permanent magnet mechanism caused by sealing-related problems (such as external factors invading and affecting the internal structure). Since the pull rod 2 needs to move up and down, linkage can be achieved through the elastic area 912. The elastic area 912 is a folded area. When the pull rod 2 moves up, the elastic area 912 will unfold to ensure sufficient moving space and avoid resistance to the movement of the pull rod 2; and when the pull rod 2 moves down, the elastic area 912 will return to folding under the elastic force of the material itself. Since the fixed area 911 is connected to the protrusion 21 and the contact spring 61, it can effectively avoid falling off during its movement to ensure the sealing effect. The upper elastic sealing ring 91 is an integrated structure, which can effectively prevent the entry of water vapor and dust, has obvious effects, is easy to operate, and has better practicality.

[0043] In one embodiment, a pressing sheet is provided on the main body of the permanent magnet 5 mechanism, and the pressing area 913 is pressed and fixed by the pressing sheet to prevent displacement during the stretching process and ensure the sealing effect.

[0044] like Figure 4As shown in the figure, the lower connecting sealing ring 92 includes a ring body 921, a first rib 922, a second rib 923, and a pressing fin 924. The ring body 921 is fixedly connected to the lower end of the permanent magnet mechanism body 1. There is an opening at the lower end of the permanent magnet mechanism body 1. The first rib 922 is fixedly connected to the ring body 921 and is located at the opening. The pressing fin 924 is connected to the ring body 921 and sleeved on the lower end of the pull rod 2. The second rib 923 is at the connection between the pressing fin 924 and the ring body 921. The lower connecting sealing ring 92 is connected to the lower end of the pull rod 2 through the pressing fin 924, which can effectively prevent foreign objects from entering the mechanism and ensure that the mechanism is not affected by water vapor and dust. Through the arrangement of the first rib 922 and the second rib 923, a supporting force can be provided to the ring body 921 to prevent the ring body 921 from collapsing when the pull rod 2 moves. At the same time, when the pull rod 2 moves during opening, the air pressure during its downward movement can be optimized to make it more stable.

[0045] Furthermore, the pressing fin 924 includes a first fin 9241, a second fin 9242, and an adjustment groove 9243. The first fin 9241 and the second fin 9242 are arranged in parallel, and an isolation cavity is formed between them. The adjustment groove 9243 is arranged at an interval from the isolation cavity. The first fin 9241 and the second fin 9242 are respectively abutted and connected to the lower end of the pull rod 2 and bent towards the bottom of the pull rod 2. The contact surface between the first fin 9241 and the pull rod 2 is a hemispherical surface, and the contact surface between the second fin 9242 and the pull rod 2 is a conical surface. Through the connection of the first fin 9241 and the second fin 9242, double-layer blocking is achieved. Moreover, the isolation cavity formed between them and the adjustment groove 9243 can make the water vapor enter a larger space after passing through the gap between the first fin 9241 and the pull rod 2, and slow down its speed under the action of pressure, and then be blocked by the second fin 9242 to achieve the effect of water vapor sealing. The contact surface between the first fin 9241 and the pull rod 2 is a hemispherical surface, that is, the first fin 9241 and the pull rod 2 are in surface contact, which can effectively reduce the friction on the pull rod 2. Under the action of the spherical surface and the adjustment groove 9243, the first fin 9241 is not easily deformed and can better prevent small particles such as dust from entering. Since the contact surface between the second fin 9242 and the pull rod 2 is a conical surface, that is, the second fin 9242 and the pull rod 2 are in line contact, when the pull rod 2 moves, the end face of the second fin 9242 will deform with the movement of the pull rod 2 and closely adhere to the lower end of the pull rod 2, which can effectively prevent the intrusion of water vapor.

[0046] Refer to Figure 3, the shock-absorbing ring 8 includes a connecting portion 81, a deformable portion 82 and a connecting rib 83. The connecting portion 81 is connected to the deformable portion 82, and the connecting portion 81 is fixedly connected to the permanent magnet mechanism main body. The cross-section of the deformable portion 82 is a hollow ellipse. The connecting rib 83 is arranged in the middle of the deformable portion 82, and the deformable portion 82 is connected to the moving iron core 3. Through the shock-absorbing ring 8, when the moving iron core 3 of the present invention is closed, it can effectively reduce the impact of the moving iron core 3 on the permanent magnet mechanism main body and the pull rod 2, and avoid the loosening of the screws after being impacted. The elliptical deformable portion 82 can better disperse the impact force, and the connecting rib 83 can also provide a restoring supporting force after the deformable portion 82 is deformed.

[0047] Refer to Figure 1 , Figure 3 , a positioning pin 14 is provided on the inner upper wall surface of the permanent magnet mechanism body 1, and a pin hole 31 corresponding to the positioning pin 14 is provided on the moving iron core 3. The positioning pin 14 is inserted into the pin hole 31. By providing the positioning pin 14, it can effectively prevent the moving iron core 3 from rotating during the opening and closing process, reduce the moving kinetic energy of the moving iron core 3, and further reduce the impact force on the permanent magnet mechanism main body, making the opening and closing of the mechanism more stable and fast.

[0048] The above-disclosed are only one or more preferred embodiments of the present application, and the scope of rights of the present application cannot be limited thereby. Those of ordinary skill in the art can understand all or part of the processes of implementing the above embodiments, and the equivalent changes made according to the claims of the present application still fall within the scope covered by the present application.

Claims

1. A portable permanent magnet mechanism with adjustable opening and closing time, characterized in that: include A permanent magnet mechanism body (1), and a pull rod (2), a moving iron core (3), a coil (4), a permanent magnet (5), an adjustment mechanism (6), a cooling mechanism (7), a shock absorbing ring (8), and a sealing mechanism (9) arranged inside the permanent magnet mechanism body (1); A coil fixing cavity (11), a cooling cavity (12) and a permanent magnet fixing cavity (13) are provided inside the permanent magnet mechanism body (1); a pull rod (2) passes through the permanent magnet mechanism body (1) and is connected to the moving iron core (3); a coil (4) is placed in the coil fixing cavity (11); a cooling mechanism (7) is placed in the cooling cavity (12) and is arranged adjacent to the coil (4); a damping ring (8) is fixed inside the permanent magnet mechanism body (1), and the damping ring (8) is located between the permanent magnet mechanism body (1) and the moving iron core (3). , one end of the sealing mechanism (9) is fixedly connected to the permanent magnet mechanism body (1), and the other end is fixedly connected to the upper end of the pull rod (2); the adjustment mechanism (6) is used to adjust the relative position of the pull rod (2) and the moving iron core (3); the cooling mechanism (7) is used to cool the coil (4); the shock-absorbing ring (8) is used to reduce the impact force of the moving iron core (3) on the permanent magnet mechanism body (1) when the switch is closed; the sealing mechanism (9) is used to seal the permanent magnet mechanism body (1) to prevent water vapor or dust from entering the permanent magnet mechanism body (1); The adjustment mechanism (6) comprises a contact spring (61), a switch-off spring (62), an iron core rear cover (63), an adjustment nut (64) and a locking nut (65); the iron core rear cover (63) is threadedly connected to the lower end of the moving iron core (3); the contact spring (61) passes through the pull rod (2); one end of the contact spring (61) is abutted against the upper end of the pull rod (2), and the other end is abutted against the iron core rear cover (63); the switch-off spring (62) passes through the pull rod (2) The contact spring (61) is located outside the contact spring (61), one end of the opening spring (62) is connected to the inner wall surface of the permanent magnet mechanism body (1), and the other end is connected to the core rear cover (63), the lower end of the pull rod (2) passes through the core rear cover (63), the adjustment nut (64) is threadedly connected to the lower end of the pull rod (2) and is connected to the outer side of the core rear cover (63), and the locking nut (65) is threadedly connected to the lower end of the pull rod (2) and is connected to the adjustment nut (64); The cooling mechanism (7) comprises a connecting spring (71), a prismatic telescopic airbag (72) and a cooling insert (73); the prismatic telescopic airbag (72) is located in the cooling chamber (12); the connecting spring (71) is fixedly connected to the upper and lower ends of the prismatic telescopic airbag (72), respectively; the connecting spring (71) is abutted against the inner wall surface of the cooling chamber (12); and the cooling insert (73) is arranged in the prismatic telescopic airbag (72) at intervals; A vent (121) is provided on one side of the cooling chamber (12) away from the coil fixing chamber (11); the other side of the cooling chamber (12) is in communication with the coil fixing chamber (11); and a plurality of one-way air outlets (111) are provided on one side of the coil fixing chamber (11) away from the cooling chamber (12).

2. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 1, characterized in that: Openings are provided on both sides of the prismatic telescopic airbag (72), one opening is abutted against and connected to the vent (121), and the other opening faces the coil (4), and a plurality of heat dissipation holes (721) are provided at the upper and lower ends of the prismatic telescopic airbag (72).

3. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 1 or 2, characterized in that: The cooling insert (73) is provided with a plurality of flow holes (731); one end of the cooling insert (73) is fixedly connected to the prismatic telescopic airbag (72); and the end surface of the other end exceeds the middle dividing interface of the prismatic telescopic airbag (72).

4. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 1, characterized in that: The sealing mechanism (9) comprises an upper elastic sealing ring (91) and a lower connecting sealing ring (92); one end of the upper elastic sealing ring (91) is fixedly connected to the permanent magnet mechanism body (1), and the other end is fixedly connected to the upper end of the pull rod (2); one end of the lower connecting sealing ring (92) is fixedly connected to the permanent magnet mechanism body (1), and the other end is butt-connected to the lower end of the pull rod (2).

5. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 4, characterized in that: The upper elastic sealing ring (91) comprises a fixed area (911), an elastic area (912) and a pressing area (913) which are connected to each other. The pressing area (913) is fixedly connected to the permanent magnet mechanism body (1). A protrusion (21) is provided at the upper end of the pull rod (2). The protrusion (21) and the contact spring (61) clamp the fixed area (911).

6. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 4, characterized in that: The lower connecting sealing ring (92) comprises a ring body (921), a first rib (922), a second rib (923) and a pressing wing (924); the ring body (921) is fixedly connected to the lower end of the permanent magnet mechanism body (1); an opening is provided at the lower end of the permanent magnet mechanism body (1); the first rib (922) is fixedly connected to the ring body (921) and is located at the opening; the pressing wing (924) is connected to the ring body (921) and is sleeved on the lower end of the pull rod (2); and the second rib (923) is located at the connection between the pressing wing (924) and the ring body (921).

7. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 6, characterized in that: The pressing wing (924) comprises a first wing (9241), a second wing (9242) and an adjustment groove (9243); the first wing (9241) and the second wing (9242) are arranged in parallel and an isolation cavity is formed therebetween; and the adjustment groove (9243) is arranged at intervals from the isolation cavity; The first wing (9241) and the second wing (9242) are respectively connected to the lower end of the pull rod (2) and bent toward the bottom of the pull rod (2); the contact surface between the first wing (9241) and the pull rod (2) is a hemispherical surface, and the contact surface between the second wing (9242) and the pull rod (2) is a conical surface.

8. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 1, characterized in that: The damping ring (8) comprises a connecting portion (81), a deforming portion (82) and a connecting rib (83); the connecting portion (81) is connected to the deforming portion (82), and the connecting portion (81) is fixedly connected to the permanent magnet mechanism body (1); the deforming portion (82) has a hollow elliptical cross section; the connecting rib (83) is arranged at the middle end of the deforming portion (82); and the deforming portion (82) is connected to the moving iron core (3).

9. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 1, characterized in that: A positioning pin (14) is provided on the inner upper wall surface of the permanent magnet mechanism body (1), a pin hole (31) corresponding to the positioning pin (14) is provided on the moving iron core (3), and the positioning pin (14) is inserted into the pin hole (31).

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