Coaxial Solenoid Valve

Abstract

To provide a solenoid valve capable of reducing production costs and facilitating demolition work.SOLUTION: A coaxial solenoid valve is equipped with a solenoid valve body, a valve seat that is engaged with a lower end of the solenoid valve at an upper end, a pin assembly that is engaged within the valve seat at an upper end and extends downward at a lower end, a continuous cover body that stores the lower end of the pin assembly, abuts on a lower end of the valve seat at an upper end, and is pressed against the lower end of the valve seat, and a coupling seat that covers an upper outer side of the continuous cover body with a lower part and covers a lower outer side of the valve seat with an upper part.SELECTED DRAWING: Figure 3

Description

[Technical field]

[0001] The present invention relates to a solenoid valve, and more particularly to a coaxial solenoid valve. [Background technology]

[0002] As a general electromagnetic safety component, solenoid valves are widely used in the control valves of various combustion appliances, and are connected with corresponding thermocouple components to realize the corresponding gas flameout protection function. Conventional solenoid valves usually adopt an assembly structure, and often adopt a tight fit between brass parts. Summary of the Invention [Problem to be solved by the invention]

[0003] This requires a large insertion / removal force for installation and removal, making the actual assembly work labor-intensive and increasing the operating costs of the manual assembly line.In addition, the assembled solenoid valve is difficult to disassemble, and the parts are not easily reusable, resulting in a large amount of waste. [Means for solving the problem]

[0004] In order to solve the above problems, the coaxial solenoid valve of the present invention comprises: A solenoid valve body, a valve seat whose upper end engages with a lower end of the solenoid valve body; a pin assembly having an upper end that engages within the valve seat and a lower end that extends downwardly; a continuous cover body that receives a lower end of the pin assembly and has an upper end that abuts against and is pressed against the lower end of the valve seat; A connecting seat having a lower portion covering an outer surface of an upper portion of the continuous cover body and an upper portion covering an outer surface of a lower portion of the valve seat; Equipped with.

[0005] The connecting seat has an integrally molded lower recessed receiving portion and a horizontal mounting portion, The lower recessed accommodating portion is provided at a central position of the horizontal mounting portion and recessed downward with respect to the horizontal mounting portion, An accommodation space is formed inside the lower concave accommodation portion, An upper portion of the continuous cover body and a lower portion of the valve seat are both accommodated in the accommodation space, A through hole is formed in the bottom of the lower recessed housing portion, A first support edge is formed on an outer edge of the through hole, The upper outer edge of the continuous cover abuts against the first support edge, It is preferable that a second support edge is formed at a connection point between the lower recessed accommodation portion and the horizontal attachment portion, and a central portion of the valve seat abuts against the second support edge.

[0006] It is preferable that a mounting ring be formed in the center of the valve seat and extend outwardly along a circumferential direction, and that a lower surface of the mounting ring be in contact with the second support edge.

[0007] It is preferable that a lower portion of the valve seat protrudes into the accommodating space by an interference fit, a lower outer wall of the valve seat is pressed against an inner wall of the accommodating space, and a lower outer edge of the valve seat is pressed against an upper end of the continuous cover body.

[0008] It is preferable that a cavity penetrating vertically is formed inside the valve seat, and an engagement portion protruding inwardly along the circumferential direction is formed at the lower portion of the cavity, and that the upper portion of the pin assembly is positioned within the cavity and the central portion of the pin assembly abuts against the engagement portion.

[0009] A first annular inclined surface is formed on the outer edge of the lower end of the valve seat, and a second annular inclined surface is formed on the inner edge of the lower end of the valve seat, It is preferable that the outer contour of the horizontal cross section of the first annular inclined surface gradually decreases from top to bottom, and the inner contour of the horizontal cross section of the second annular inclined surface gradually increases from top to bottom.

[0010] The pin assembly includes a mounting seat, a pin, and a seal portion. The pin penetrates the mounting base, a lower portion of the pin extends downward and protrudes from a lower end of the mounting base, and an upper portion of the pin protrudes from an upper end of the mounting base, The seal portion covers an upper portion of the pin, It is preferable that the lower end of the sealing portion abuts the mounting base, the inner edge of the sealing portion is in close contact with the outer edge of the pin, the outer edge of the sealing portion is in close contact with the inner wall of the cavity, and the central portion of the mounting base extends outward in the circumferential direction to form an insulating portion, and the insulating portion abuts the engagement portion.

[0011] The cavity includes an upper cavity, a middle cavity, and a lower cavity that are sequentially connected from top to bottom, The inner diameter of the upper cavity and the inner diameter of the lower cavity are both larger than the inner diameter of the middle cavity, It is preferable that the mounting base is accommodated in the lower cavity, and an upper portion of the sealing portion protrudes into the middle cavity.

[0012] the continuous cover body includes a lower cover body and an upper cover body that are integrally connected from bottom to top, the outer contour of the upper cover body is larger than the outer contour of the lower cover body, and the outer diameter of the lower cover body is smaller than the inner diameter of the through hole, A step structure is formed on the outer side of the connection portion between the upper cover body and the lower cover body, the step structure abuts against the first support edge, and the upper cover body abuts against an inner wall of the storage space, It is preferable that a third annular inclined surface is formed on the outer edge of the upper cover body, the outer contour of the horizontal cross section of the third annular inclined surface gradually becomes smaller from bottom to top, and the inner edge of the upper end of the upper cover body abuts against the first annular inclined surface.

[0013] It is preferable that a guide protrusion is formed extending downward on the inside of a lower end of the valve seat, and the guide protrusion protrudes toward the inside of the upper cover body. Effect of the Invention

[0014] According to the present invention, it is possible to optimize the mounting of the solenoid valve structure, facilitate assembly, increase production efficiency, and reduce production costs while ensuring electrical connectivity in the solenoid valve. In addition, according to the present invention, the solenoid valve can be easily mounted and removed, and dismantled. [Brief description of the drawings]

[0015] [Figure 1] FIG. 2 is an overall schematic diagram of a first angle of the coaxial solenoid valve according to the present invention. [Diagram 2] FIG. 2 is an overall schematic view of a second angle of the coaxial solenoid valve according to the present invention. [Diagram 3] 1 is a schematic cross-sectional view of a coaxial solenoid valve according to the present invention. [Figure 4] FIG. 2 is a partial schematic diagram of a coaxial solenoid valve according to the present invention. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0016] The present invention will be further described below with reference to the drawings and specific examples, but the present invention is not limited thereto.

[0017] As shown in Figures 1 to 3, the coaxial solenoid valve in a preferred embodiment has a solenoid valve body 1, a valve seat 2 the upper end of which engages with the lower end of the solenoid valve body 1, a pin assembly 3 the upper end of which engages within the valve seat 2 and the lower end of which extends downward, a continuous cover body 4 the upper end of which abuts against the lower end of the valve seat 2 and is pressed against the lower end of the valve seat 2, accommodating the lower end of the pin assembly 3, and a connecting seat 5 the lower part of which covers the outer upper part of the continuous cover body 4 and the upper part of which covers the outer lower part of the valve seat 2.

[0018] Furthermore, the pin assembly 3 is pressed into the valve seat 2 from bottom to top, and the pin assembly 3 is connected to the corresponding pipe-shaped socket of the thermocouple to form a structure of surface contact conduction. Then, the continuous cover body 4 is inserted into the inside of the connecting seat 5 by interference fitting and pressing deformation, and the valve seat 2 is attached. As a result, the lower part of the valve seat 2 also applies a certain pressure to the inner wall of the connecting seat 5. This pressing is performed until the lower end of the valve seat 2 abuts against the upper end of the continuous cover body 4. In this way, the coaxial solenoid valve adopts an axial interference fit, which stabilizes the installation of the entire structure and ensures the stability of the electrical contact. When the installation is completed, the positions between the solenoid valve body 1, the valve seat 2, the pin assembly 3, the continuous cover body 4 and the connecting seat 5 are relatively fixed. And, the positive and negative ends of the solenoid valve are insulated by such a tight fitting of the structure.

[0019] Also, preferably, the connecting seat 5 includes a lower recessed accommodation portion 51 and a horizontal mounting portion 52 that are integrally molded, and the lower recessed accommodation portion 51 is provided at the center position of the horizontal mounting portion 52. The lower recessed accommodation portion 51 is recessed downward relative to the horizontal mounting portion 52, and an accommodation space 53 is formed inside the lower recessed accommodation portion 51. The upper portion of the continuous cover body 4 and the lower portion of the valve seat 2 are both accommodated in the accommodation space 53, and a through hole 54 is formed at the bottom of the lower recessed accommodation portion 51, and a first support edge 55 is formed at the outer edge of this through hole. The outer edge of the upper portion of the continuous cover body 4 abuts against the first support edge 55, and a second support edge 56 is formed at the connection point between the lower recessed accommodation portion 51 and the horizontal mounting portion 52, and the center of the valve seat 2 abuts against the second support edge 56.

[0020] Also, preferably, the upper side of the connection portion between lower recessed accommodating portion 51 and horizontal mounting portion 52 is formed to have an arc-shaped edge.

[0021] Also, preferably, the continuous cover body 4 is made of an aluminum material.

[0022] Preferably, both ends of the horizontal mounting portion 52 are projected outward along the horizontal direction to form two mounting ends, each of which is provided with a mounting hole.

[0023] In addition, preferably, a mounting ring 21 is formed in the center of the valve seat 2 so as to extend outward along the circumferential direction, and the lower surface of the mounting ring 21 abuts against the second support edge 56 .

[0024] In addition, preferably, the lower portion of the valve seat 2 protrudes into the accommodation space 53 by tight fit, the lower outer wall of the valve seat 2 is pressed against the inner wall of the accommodation space 53, and the lower end outer edge of the valve seat 2 is pressed against the upper end of the continuous cover body 4.

[0025] In addition, preferably, a cavity 22 penetrating vertically is formed inside the valve seat 2, and an engagement portion 23 protruding inwardly along the circumferential direction is formed at the lower portion of the cavity 22, with the upper portion of the pin assembly 3 positioned within the cavity 22 and the central portion of the pin assembly 3 abutting against the engagement portion 23.

[0026] Also, preferably, a first annular inclined surface 24 is formed on the outer edge of the lower end of the valve seat 2, and a second annular inclined surface 25 is formed on the inner edge of the lower end of the valve seat 2. The outer contour of the horizontal cross section of the first annular inclined surface 24 gradually decreases from top to bottom, and the inner contour of the horizontal cross section of the second annular inclined surface 25 gradually increases from top to bottom. Furthermore, the first annular inclined surface 24 gradually increases in diameter upward, and the outer edge surrounding the lower end of the valve seat 2 presents an annular surface. The first annular inclined surface 24 serves to guide the valve seat 2 into the connection cover body, making it easier to receive force during manual installation. The second annular inclined surface 25 gradually decreases in diameter upward, and exerts a certain guiding effect when the main body is pressed in during installation, which will be described later.

[0027] Also, preferably, the pin assembly 3 includes a mounting base body 31, a pin 32, and a seal portion 33. The pin 32 is provided in the mounting base body 31 so as to penetrate the mounting base body 31. The lower portion of the pin 32 extends downward and protrudes from the lower end of the mounting base body 31. The upper portion of the pin 32 protrudes from the upper end of the mounting base body 31, and the seal portion 33 is provided so as to cover the upper portion of the pin 32. The lower end of the seal portion 33 abuts against the mounting base body 31, and the inner edge of the seal portion 33 is in close contact with the outer edge of the pin 32. Here, the outer edge of the seal portion 33 is in close contact with the inner wall of the cavity 22, and the central portion of the mounting base body 31 extends outward along the circumferential direction to form an insulating portion 34. Here, the insulating portion 34 abuts against the engagement portion 23.

[0028] Preferably, the horizontal cross-sectional outline of the mounting body becomes larger and then becomes smaller, and the insulating portion 34 is formed in correspondence with the portion where the outline becomes larger to the maximum value. Here, the engaging portion 23 is formed at the tip of the second annular inclined surface 25, so that the mounting body restricts the insulating portion 34 from below to above at the engaging portion 23 and the cavity 22 in the radial direction, thereby ensuring the stability of the mounting.

[0029] The above are preferred embodiments of the present invention, but they do not limit the embodiments and protection scope of the present invention.

[0030] The present invention further includes the following embodiments. In yet another embodiment of the present invention, cavity 22 comprises an upper cavity 221, a middle cavity 222, and a lower cavity 223, which are arranged in sequence from top to bottom, and the inner diameters of upper cavity 221 and lower cavity 223 are all larger than the inner diameter of middle cavity 222, mounting base body 31 is accommodated in lower cavity 223, and the upper part of sealing portion 33 protrudes into middle cavity 222.

[0031] In another embodiment of the present invention, the seal 33 is pressed between the mounting seat 31 and the inner wall of the central cavity 222. This provides some degree of sealing, but the longitudinal cross section of the seal 33 presents a tapered cap as shown in FIG.

[0032] In another embodiment of the present invention, the continuous cover body 4 includes a lower cover body 41 and an upper cover body 42 that are integrally connected in order from the bottom, and the outer contour of the upper cover body 42 is larger than the outer contour of the lower cover body 41. The outer diameter of the lower cover body 41 is smaller than the inner diameter of the through hole 54. A step structure 43 is formed on the outside of the connection part between the upper cover body 42 and the lower cover body 41, and the step structure 43 abuts against the first support edge 55. The upper cover body 42 abuts against the inner wall of the storage space 53, and the outer wall of the upper cover body 42 is pressed against the inner wall of the storage space 53. In addition, a third annular inclined surface 44 is formed on the outer edge of the upper cover body 42. The outer contour of the horizontal cross section of the third annular inclined surface 44 gradually becomes smaller from the bottom to the top, and the inner edge of the upper end of the upper cover body 42 abuts against the first annular inclined surface 24.

[0033] In another embodiment of the present invention, a guide protrusion 27 is formed on the inside of the lower end of the valve seat 2 so as to extend downward, and the guide protrusion 27 is provided so as to protrude to the inside of the upper cover body 42.

[0034] In another embodiment of the present invention, a right-angled ring surface 28 is formed on the outside of the guide protrusion 27. There is a certain gap between the outside of the right-angled ring surface 28 and the inside of the upper cover body 42, and the upper end of the right-angled ring surface 28 is continuous with the first annular inclined surface 24. Specifically, the lower part of the radial cross section of the right-angled ring surface 28 is formed with a right-angled side. The inside of the guide protrusion 27 is formed as an annular inclined surface whose inner diameter gradually decreases from bottom to top.

[0035] In another embodiment of the present invention, a cavity 11 that opens downward is formed in the lower part of the solenoid valve body 1. An electromagnet 12 is housed in this cavity 11, and a step part 224 is formed at the connection part between the upper cavity 221 and the middle cavity 222.

[0036] The lower end of the electromagnet 12 protrudes into the upper cavity 221 and abuts against the step portion 224. A stopper annular groove portion 26 is recessed into the upper end of the valve seat 2, and an annular protrusion portion 13 is protruded into the lower end of the cavity 11, with the stopper annular groove portion 26 and the annular protrusion portion 13 being aligned with each other.

[0037] In another embodiment of the present invention, the present invention has at least the following pressing conditions inside by the above-mentioned assembly and structural design. The annular protrusion 13 is pressed into the stopper annular groove 26 so as to protrude inward in an annular shape, and is in a locked state. The seal portion 33 receives, from top to bottom, the radial pressure of the inner wall of the middle cavity 222, the axial pressure of the step at the connection point between the middle cavity 222 and the lower cavity 223, and the radial pressure of the lower cavity 223. The mounting seat body 31 and a part of the outer wall of the lower cavity 223 both receive the radial pressure of the inner wall of the lower cavity 223, and also receive a supporting force coming from the engagement portion 23 of the valve seat 2 from below to above via the insulating portion 34. The lower outer wall of the valve seat 2 receives a pressing force generated between the inner wall of the connecting seat 5, and the outer diameter of the lower cover body 41 is smaller than the inner diameter of the through hole 54. The mounting ring 21 presses against the second support edge 56, forming a constant pressing force in the axial direction. The upper end inner edge of the upper cover body 42 presses against the first annular inclined surface 24 at the lower end of the valve seat 2, and a vertical pressing force acts on the first annular inclined surface 24. The second annular inclined surface 25 forms a constant pressing force only when the mounting seat body 31 enters the lower cavity 223. This specifically refers to the pressing force between the insulating part 34 and the second annular inclined surface 25.

[0038] In another embodiment of the present invention, the solenoid valve body 1 includes a casing and a spring seat body. The casing is formed with the above-mentioned cavity 11, and an electromagnet 12 is attached inside the casing. The spring seat body arranged at the top has its lower end connected to one end of the valve shaft, and the other end of the valve shaft is connected to the movable iron core via the casing. Furthermore, a spring is attached to the valve shaft, and the upper end of the spring is connected to the lower end of the spring seat body, the lower end of the spring is connected to the upper end of the casing, and the lower end of the casing is connected to the valve seat 2.

[0039] The above are preferred embodiments of the present invention, but they do not limit the embodiments and protection scope of the present invention. Any equivalent replacement and obvious changes made by using the specification and illustrations of the present invention should be included in the protection scope of the present invention, which will be recognized by those skilled in the art. [Explanation of symbols]

[0040] 1: solenoid valve body, 2: valve seat, 3: pin assembly, 4: continuous cover body, 5: connecting seat, 51: lower concave accommodation portion, 52: horizontal mounting portion, 53: accommodation space, 54: through hole, 55: first support edge, 56: second support edge, 21: mounting ring, 22: cavity, 23: engagement portion, 24: first annular inclined surface, 25: second annular inclined surface, 31: mounting seat body, 32: Pin, 33: sealing portion, 34: insulating portion, 221: upper cavity, 222: middle cavity, 223: lower cavity, 41: lower cover body, 42: upper cover body, 43: step structure, 44: third annular inclined surface, 27: guide protrusion, 28: right-angled ring surface, 11: cavity, 12: electromagnet, 224: step portion, 26: stopper annular groove portion, 13: annular protrusion.

Claims

1. A solenoid valve body, a valve seat whose upper end engages with a lower end of the solenoid valve body; a pin assembly having an upper end that engages within the valve seat and a lower end that extends downwardly; a continuous cover body that receives a lower end of the pin assembly and has an upper end that abuts against and is pressed against the lower end of the valve seat; A connecting seat having a lower portion covering an outer surface of an upper portion of the continuous cover body and an upper portion covering an outer surface of a lower portion of the valve seat; Equipped with The connecting seat has an integrally molded lower recessed receiving portion and a horizontal mounting portion, The lower recessed accommodating portion is provided at a central position of the horizontal mounting portion and recessed downward with respect to the horizontal mounting portion, An accommodation space is formed inside the lower concave accommodation portion, An upper portion of the continuous cover body and a lower portion of the valve seat are both accommodated in the accommodation space, A through hole is formed in the bottom of the lower recessed housing portion, A first support edge is formed on an outer edge of the through hole, an upper outer edge of the continuous cover body abuts against the first support edge; A second support edge is formed at a connection point between the lower concave accommodation portion and the horizontal mounting portion, and a center portion of the valve seat abuts against the second support edge; a cavity penetrating vertically is formed inside the valve seat, and an engagement portion protruding inwardly along a circumferential direction is formed at a lower portion of the cavity, an upper portion of the pin assembly is positioned within the cavity, and a central portion of the pin assembly abuts against the engagement portion, A first annular inclined surface is formed on an outer edge of a lower end of the valve seat, and a second annular inclined surface is formed on an inner edge of a lower end of the valve seat, The outer contour of the horizontal cross section of the first annular inclined surface gradually decreases from top to bottom, and the inner contour of the horizontal cross section of the second annular inclined surface gradually increases from top to bottom, the continuous cover body includes a lower cover body and an upper cover body that are integrally connected from bottom to top, the outer contour of the upper cover body is larger than the outer contour of the lower cover body, and the outer diameter of the lower cover body is smaller than the inner diameter of the through hole, a step structure is formed on the outer side of a connection portion between the upper cover body and the lower cover body, the step structure abuts against the first support edge, and the upper cover body abuts against an inner wall of the storage space; a third annular inclined surface is formed on the outer edge of the upper cover body, the outer contour of the horizontal cross section of the third annular inclined surface gradually becomes smaller from bottom to top, and the inner edge of the upper end of the upper cover body abuts against the first annular inclined surface.

2. 2. The coaxial solenoid valve according to claim 1, wherein a mounting ring is formed at the center of the valve seat and extends outward along a circumferential direction, and a lower surface of the mounting ring abuts against the second support edge.

3. 2. The coaxial solenoid valve according to claim 1, wherein a lower portion of the valve seat protrudes into the accommodation space by interference fit, a lower outer wall of the valve seat is pressed against an inner wall of the accommodation space, and a lower end outer edge of the valve seat is pressed against an upper end of the continuous cover body.

4. The pin assembly includes a mounting seat, a pin, and a seal portion. The pin penetrates the mounting base, a lower portion of the pin extends downward and protrudes from a lower end of the mounting base, and an upper portion of the pin protrudes from an upper end of the mounting base, The seal portion covers an upper portion of the pin, 2. The coaxial solenoid valve according to claim 1, characterized in that a lower end of the seal portion abuts against the mounting seat, an inner edge of the seal portion is in close contact with an outer edge of the pin, an outer edge of the seal portion is in close contact with an inner wall of the cavity, a central portion of the mounting seat extends outward along a circumferential direction to form an insulating portion, and the insulating portion abuts against the engagement portion.

5. The cavity includes an upper cavity, a middle cavity, and a lower cavity that are sequentially connected from top to bottom, The inner diameter of the upper cavity and the inner diameter of the lower cavity are both larger than the inner diameter of the middle cavity, 5. The coaxial solenoid valve according to claim 4, wherein the mounting seat is accommodated in the lower cavity, and an upper portion of the seal portion protrudes into the middle cavity.

6. 2. The coaxial solenoid valve according to claim 1, wherein a guide protrusion is formed on an inner side of a lower end of the valve seat, the guide protrusion extending downward, and the guide protrusion protruding toward an inner side of the upper cover body.

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