Portable permanent magnetic mechanism capable of adjusting opening and closing time

Abstract

A portable permanent magnetic mechanism capable of adjusting opening and closing time comprises a permanent magnetic mechanism body, a pull rod, a movable iron core, a coil, a permanent magnet, an adjusting mechanism, a cooling mechanism, a damping ring and a sealing mechanism, and the pull rod, the movable iron core, the coil, the permanent magnet, the adjusting mechanism, the cooling mechanism, the damping ring and the sealing mechanism are arranged in the permanent magnetic mechanism body. The pull rod penetrates through the permanent magnetic mechanism body and is connected with the movable iron core, the coil is placed in the coil fixing cavity, the cooling mechanism is placed in the cooling cavity and is adjacent to the coil, the damping ring is fixed in the permanent magnetic mechanism body and located between the permanent magnetic mechanism body and the movable iron core, and one end of the sealing mechanism is fixedly connected with the permanent magnetic mechanism body. And the other end is fixedly connected with the pull rod. According to the invention, the switching-on time and the switching-off time of the permanent magnetic mechanism are adjusted through the adjusting mechanism, and multiple actions of the circuit breaker have good synchronism. And the cooling mechanism can reduce the problem of aging of coil insulating materials caused by high temperature.

Description

Technical Field

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

[0002] In the field of intelligent distribution network, fast protection circuit breakers are widely used. The reason is that they can divide the distribution network lines into sections and boundaries, and rely on the protection time difference coordination in the event of a fault to minimize the scope of power outage. This requires accurate judgment of the circuit breaker protection system and reliable fast-acting performance of the circuit breaker operating mechanism. While achieving the time difference coordination of the circuit breaker protection action, in order to ensure the fast-acting performance of the line fast-break protection, the circuit breaker protection tripping time is generally required to be no more than 40ms.

[0003] Traditional permanent magnet circuit breakers are limited by the one-to-three transmission structure, resulting in long action buffer time and large output dispersion. In conjunction with the protection outlet, the general fault removal time is greater than 60ms. There are also circuit breakers driven by single-phase permanent magnet mechanisms, that is, each item 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 actions of the circuit breaker (the absolute value of the difference between the first phase and the last phase of the circuit breaker is less than 2ms). For example, a permanent magnet mechanism with adjustable closing and opening time mentioned in the prior patent (publication number CN104821262B) adds a limit mechanism to each permanent magnet mechanism to achieve precise adjustment of the compression amount of the opening spring, thereby controlling the action time of each permanent magnet mechanism and ensuring that the protection tripping time of each permanent magnet mechanism has good synchronization.

[0004] However, there are still some problems in this structure: the threaded steel sleeve and the locking nut may become loose due to vibration during long-term use. Once the thread is loose, the compression of the opening spring will change, which will affect the action time of the permanent magnetic mechanism and destroy the synchronization of various permanent magnetic mechanisms. In addition, 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 aging of the coil insulation material, and severe vibration may cause micro cracks inside the coil, which may reduce the stability of the coil. Therefore, a permanent magnetic 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 time, which solves the problem that the threads of the above-mentioned permanent magnet mechanism may become loose due to vibration and the coil becomes unstable due to the influence of temperature and humidity.

[0006] To achieve the above-mentioned object, the present invention provides a portable permanent magnet mechanism with adjustable opening and closing time, 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; A coil fixing cavity, a cooling cavity and a permanent magnet fixing cavity are provided inside the permanent magnet mechanism body, 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 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 adjustment 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 when closing the switch, and 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; The adjustment mechanism includes a contact spring, a disconnecting spring, a core back cover, an adjusting nut and a locking nut. The core back 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 is abutted against the upper end of the pull rod, and the other end is abutted against the core back cover. The disconnecting spring passes through the pull rod and is located on the outside of the contact spring. One end of the disconnecting spring is abutted against the inner wall surface of the permanent magnet mechanism body, and the other end is abutted against the core back cover. The lower end of the pull rod passes through the core back cover, the adjusting nut is threadedly connected to the lower end of the pull rod and abutted against the outside of the core back cover, and the locking nut is threadedly connected to the lower end of the pull rod and abutted against the adjusting nut.

[0007] Preferably, the cooling mechanism comprises a connecting spring, a prismatic telescopic airbag and a cooling insert, the prismatic telescopic airbag is in the cooling cavity, the connecting spring is fixedly connected to the upper and lower ends of the prismatic telescopic airbag respectively, and the connecting spring is abutted against the inner wall of the cooling cavity, and the cooling insert is arranged in the prismatic telescopic airbag at intervals; A vent is provided on one side of the cooling cavity away from the coil fixing cavity, the other side of the cooling cavity is communicated with the coil fixing cavity, and a plurality of one-way air outlets are provided on one side of the coil fixing cavity away from the cooling cavity.

[0008] Preferably, openings are provided on both sides of the prismatic telescopic airbag, one opening is abutted against and connected to the vent, and the other opening faces the coil, and a plurality of heat dissipation holes are provided at the upper and lower ends of the prismatic telescopic airbag.

[0009] Preferably, a plurality of flow holes are provided on the cooling plug, one end of the cooling plug is fixedly connected to the prismatic telescopic airbag, and the end surface of the other end exceeds the middle dividing interface of the prismatic telescopic airbag.

[0010] 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.

[0011] 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.

[0012] 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.

[0013] 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; 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.

[0014] 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.

[0015] 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. Beneficial effects of the present invention: 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.

[0016] 2. The cooling mechanism of the present invention adopts a combination of a prismatic telescopic airbag, a connecting spring and a cooling insert, and cooperates with the design of a vent and a one-way air outlet to achieve cooling of the coil, which can more effectively deal 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 the effective cooling of the coil is achieved without affecting the normal operation of other components, which meets the space and functional requirements in actual production.

[0017] 3. The sealing mechanism of the present invention provides a stable sealing environment for the permanent magnet mechanism, which can ensure the sealing of the mechanism, reduce the failure of the permanent magnet mechanism caused by sealing-related problems (such as external factors invading and affecting the internal structure), and enable the permanent magnet mechanism to operate more stably. For the coil 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 can operate more stably.

[0018] 4. The present invention can effectively reduce the impact of the moving iron core on the permanent magnet mechanism body and the pull rod when the moving iron core is closed through the shock-absorbing ring, and prevent the screws from loosening after being impacted. The elliptical deformation part can better disperse the impact force, and the connecting ribs can also provide support for recovery after the deformation part is deformed. And by setting the positioning pin, it can effectively prevent the moving iron core from rotating during the opening and closing process, causing the adjustment nut and the locking nut to loosen, making the opening and closing of the mechanism more stable and quick. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art are briefly introduced below.

[0020] Figure 1 It is a schematic cross-sectional view of the overall structure of the present invention.

[0021] Figure 2 It is a schematic diagram of the position structure of the cooling mechanism and the coil of the present invention.

[0022] Figure 3 yes Figure 1 Enlarged view of point A in the middle.

[0023] Figure 4 yes Figure 1 Enlarged view of point B in the middle.

[0024] In the figure: permanent magnet mechanism body 1; coil fixing cavity 11; one-way air outlet 111; cooling cavity 12; vent 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; adjustment mechanism 6; contact spring 61; opening spring 62; iron core back cover 63; adjustment nut 64; locking nut 65; cooling mechanism 7; connecting spring 71; prismatic telescopic airbag 72 ; heat dissipation hole 721; cooling plug 73; circulation hole 731; shock absorbing 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; adjustment groove 9243. DETAILED DESCRIPTION

[0025] Embodiments of the present invention are described in detail below. Examples of the embodiments are shown in the accompanying drawings. The embodiments described below with reference to the accompanying drawings are exemplary and are intended to be used to explain the present invention, but should not be construed as limiting the present invention.

[0026] like Figure 1 As shown, a portable permanent magnet mechanism with adjustable opening and closing time comprises 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, 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 damping ring 8 is fixed inside the permanent magnet mechanism body 1, and the damping ring 8 is 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 damping ring 8 is used to reduce the impact force of the moving iron core 3 on the permanent magnet mechanism body 1 when closing the switch, and 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 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.

[0027] like Figure 2As shown, the cooling mechanism 7 includes a connecting spring 71, a prismatic telescopic airbag 72 and a cooling insert 73. The prismatic telescopic airbag 72 is 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, and the connecting spring 71 is connected to the inner wall of the cooling chamber 12. The cooling insert 73 is arranged in the prismatic telescopic airbag 72 at intervals. A vent 121 is provided on the side of the cooling chamber 12 away from the coil fixing chamber 11. The other side of the cooling chamber 12 is connected to 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 prismatic telescopic airbag 72, the connecting spring 71 and the cooling insert 73, and cooperates with the design of the vent 121 and the one-way air outlet 111 to achieve cooling of the coil 4, which can more effectively deal with various adverse factors in the working environment of the coil 4, such as temperature changes. The cooling mechanism 7 can be well integrated into the permanent magnet mechanism based on the internal space of the permanent magnet mechanism and the working characteristics of the coil 4, and can achieve effective cooling of the coil 4 without affecting the normal operation of other components, which meets the space and functional requirements in actual production. At least one of the connecting springs 71 of the present invention is made of memory alloy, which can automatically sense the temperature change in the mechanism. When the coil 4 is seriously heated in the working state, the prismatic telescopic airbag 72 can be automatically compressed. After being compressed, the prismatic telescopic airbag 72 will cause changes in the air pressure space, and exhale the vent 121 and the coil fixing cavity 11. The colder air outside the cooling cavity 12 and the hotter air in the coil fixing cavity 11 flow and mix in the cooling cavity 12 to cool down, and the hot air in the coil fixing cavity 11 is discharged from the one-way air outlet 111 under pressure, so as to avoid the continuous heating of the coil 4, which is conducive to reducing the aging problem of the insulating material of the coil 4 that may be caused by high temperature, reducing the frequency of the coil 4 needing to be replaced due to aging, and reducing the material cost.

[0028] Furthermore, openings are provided on both sides of the prismatic telescopic airbag 72. The opening on one side of the prismatic telescopic airbag 72 is connected to the vent 121, and the opening on the other side faces the coil 4. A plurality of heat dissipation holes 721 are provided at the upper and lower ends of the prismatic telescopic airbag 72. When the prismatic telescopic airbag 72 is compressed, the air originally in the airbag will be output to the opening and the heat dissipation holes 721. The prismatic telescopic airbag 72 of the present invention is made of silica gel, and silica gel is a material with a porous structure. It has a strong adsorption property and can absorb moisture and other small molecules. Due to its porous structure, it will absorb energy when absorbing moisture, so the air temperature in the airbag is relatively low. When the prismatic 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 the spring will shrink after cooling and drive the airbag to reset. When the airbag is reset, air will be sucked into the vent 121 and the coil fixing cavity 11, and the hotter air in the coil fixing cavity 11 that has been cooled once will be sucked into the airbag, and the cooling insert 73 divides the silica gel into multiple barrier areas. The flowing air then enters the airbag and will come into contact with the cooling insert 73 and the silica gel, taking away part of the temperature, thereby lowering the temperature.

[0029] Furthermore, 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 interface of the prismatic telescopic airbag 72. The heat of the air flowing inside the airbag can be better exchanged through the flow holes 731. The end surface of the cooling insert 73 exceeds the middle interface of the prismatic telescopic airbag 72, which can better divide the inside of the airbag into multiple areas, increase the friction of the air, and accelerate the cooling.

[0030] In one embodiment, the connection spring 71 of the present invention can be electrically connected. By electrically heating the connection spring 71 and using a system with detection equipment, the expansion and contraction of the spring can be automatically controlled to achieve control of the airbag.

[0031] In one embodiment, the connecting springs 71 at the upper and lower ends of the prismatic telescopic airbag 72 of the present invention are a memory spring and a support spring. The memory spring is heated by powering on to change its extension, and the airbag can be supported by the support spring, so that the retraction speed of the memory spring can be accelerated after the power is cut off.

[0032] In one embodiment, the present invention includes a support spring and a memory spring, and the memory spring is sleeved on the outside of the support spring. After the memory spring is heated and expanded, the prismatic telescopic airbag 72 can be compressed, and the band-pass support spring is expanded. After the temperature drops, the pulling force of the support spring is greater than the stretching force of the memory spring, which will pull the airbag back to achieve control of the airbag.

[0033] See also 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.

[0034] 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.

[0035] 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.

[0036] like Figure 4As shown, the lower connecting sealing ring 92 includes 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, the lower end of the permanent magnet mechanism body 1 is provided with an opening, 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 at the connection between the pressing wing 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 wing 924, which can effectively prevent foreign factors from entering the mechanism and ensure that the mechanism is not affected by water vapor and dust. And 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, the air pressure of its downward movement can be optimized to make it more stable.

[0037] Furthermore, the pressing wing 924 includes 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 form an isolation cavity between the two. The adjustment groove 9243 and the isolation cavity are arranged at intervals. 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. Double-layer isolation is achieved by connecting the first wing 9241 and the second wing 9242. Moreover, the isolation cavity formed between the two and the adjustment groove 9243 can make water vapor enter a larger space after passing through the gap between the first wing 9241 and the pull rod 2, slowing down its speed under the action of pressure, and then being isolated by the second wing 9242, achieving the effect of water vapor sealing. The contact surface between the first wing 9241 and the pull rod 2 is a hemispherical surface, that is, the first wing 9241 and the pull rod 2 are in surface contact, which can effectively reduce the friction on the pull rod 2, and the first wing 9241 is not easily deformed under the action of the spherical surface and the adjustment groove 9243, which can better prevent the entry of fine particles such as dust. The contact surface between the second wing 9242 and the pull rod 2 is a conical surface, that is, the second wing 9242 and the pull rod 2 are in line contact, so when the pull rod 2 moves, the end face of the second wing 9242 will deform with the movement of the pull rod 2, close to the lower end of the pull rod 2, and can effectively prevent the intrusion of water vapor.

[0038] See also Figure 3The damping ring 8 includes 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 main body of the permanent magnetic mechanism. The cross-section of the deforming portion 82 is a hollow ellipse. 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. Through the damping ring 8, the moving iron core 3 of the present invention can effectively reduce the impact of the moving iron core 3 on the main body of the permanent magnetic mechanism and the pull rod 2 when the switch is closed, and avoid the situation where the screws become loose after being impacted. The elliptical deforming portion 82 can better disperse the impact force, and the connecting rib 83 can also provide a restoring support force after the deformation of the deforming portion 82.

[0039] See also Figure 1 , Figure 3 A positioning pin 14 is provided on the upper wall 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, and the positioning pin 14 is inserted into the pin hole 31. By providing the positioning pin 14, the moving iron core 3 can be effectively prevented from rotating during the opening and closing process, and the moving kinetic energy of the moving iron core 3 can be reduced, thereby reducing its impact force on the permanent magnet mechanism body, making the opening and closing of the mechanism more stable and quick. What is disclosed above is only one or more preferred embodiments of the present application, and cannot be used to limit the scope of rights of the present application. Ordinary technicians in this field can understand that all or part of the processes of implementing the above embodiments and equivalent changes made according to the claims of the present application are still 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 opening spring (62) 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).

2. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 1, characterized in that: 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).

3. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 2, 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).

4. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 2 or 3, 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).

5. 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).

6. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 5, 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).

7. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 5, 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).

8. A portable permanent magnet mechanism with adjustable opening and closing time as claimed in claim 7, 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.

9. 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).

10. 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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