Solenoid valve

Abstract

The utility model discloses an electromagnetic valve which comprises a valve body part and a piston part, the piston part is located in an inner cavity of the valve body part, the piston part comprises a piston body and a sealing plug, and the piston body comprises a containing groove and a balance channel. The upper end of the balance channel extends to the upper surface of the piston body, the lower end of the balance channel extends to the lower surface of the piston body, and a notch is formed in the side wall of the containing groove, extends to the bottom wall of the containing groove and serves as a part of the balance channel. The sealing plug is at least partially located in the containing groove. By means of the structural design, the balance channel and the containing groove are combined into a whole, the functions of the balance channel and the containing groove are achieved, the liquid seal prevention effect is achieved, meanwhile, the outer diameter of the piston can be effectively reduced, the product size can be reduced easily, and the overall miniaturization design of the electromagnetic valve is achieved.

Description

Technical Field

[0001] The utility model relates to the technical field of fluid control, in particular to a solenoid valve. Background Art

[0002] In the field of pilot solenoid valves for high-pressure fluids, the piston generally has a balancing channel to balance the pressure inside the valve body. At the same time, in order to prevent the sealing gasket installed on the piston from deforming due to sudden changes in the refrigerant state, the piston generally also has a liquid-proof sealing groove. Setting two structures on the piston requires the piston to have a certain size, which is not conducive to the overall miniaturization design of the solenoid valve.

[0003] In order to solve the above problems, it is necessary to propose a solenoid valve with a new piston structure. Utility Model Content

[0004] In view of the shortcomings of the background technology, the utility model proposes a solenoid valve, including a valve body component and a piston component, the piston component is located in the inner cavity of the valve body component, the piston component includes a piston body and a sealing plug, the piston body includes a receiving groove and a balancing channel; the upper end of the balancing channel extends to the upper surface of the piston body, the lower end of the balancing channel extends to the lower surface of the piston body, the side wall of the accommodating groove has a notch, the notch extends to the bottom wall of the accommodating groove, and the notch serves as a part of the balancing channel; the sealing plug is at least partially located in the accommodating groove.

[0005] Compared with the background technology, the sealing plug in the utility model is at least partially located in the accommodating groove, and the side wall of the accommodating groove has a notch. The notch serves as a part of the balancing channel. The balancing channel integrates the liquid-proof sealing function and can effectively reduce the outer diameter of the piston, thereby reducing the product volume and realizing the overall miniaturization design of the solenoid valve. BRIEF DESCRIPTION OF THE DRAWINGS

[0006] In order to more clearly illustrate the technical solution of the embodiment of the utility model, the following is a brief introduction to the drawings of the embodiment. Among them, the drawings are only used to show some embodiments of the utility model, and not to limit all embodiments of the utility model to them. In the drawings:

[0007] Figure 1 It is an overall schematic diagram of the solenoid valve in the utility model;

[0008] Figure 2 for Figure 1 A is a partial enlarged view of position A in the middle;

[0009] Figure 3 This is a schematic diagram of the internal structure of the solenoid valve in the utility model;

[0010] Figure 4 for Figure 3 A partial enlarged view of position B in the middle;

[0011] Figure 5 It is a cross-sectional view of the piston body in the utility model;

[0012] Figure 6 It is a cross-sectional view of the piston body in the utility model;

[0013] Figure 7 This is a schematic diagram of the piston body in the utility model when viewed from the bottom;

[0014] Figure 8 for Figure 7 A partial enlarged view of position C in the middle.

[0015] In the figure:

[0016] 100, valve body component; 110, valve seat; 111, valve port end; 120, valve body; 121, mounting hole; 200, piston component; 210, piston body; 211, accommodating groove; 2111, notch; 2112, ring groove; 212, balance channel; 2121, large diameter section; 2122, small diameter section; 213, mounting groove; 214, pilot valve channel; 220, sealing plug; 230, piston ring; 300, inlet pipe; 400, valve cover; 500, sleeve; 600, valve core. DETAILED DESCRIPTION

[0017] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0018] In the drawings, the shapes and dimensions may be exaggerated for clarity, and the same reference numerals will be used throughout to designate the same or like components.

[0019] In the following description, words such as center, thickness, height, length, front, back, rear, left, right, top, bottom, upper, lower, etc. are defined relative to the structure shown in the drawings. In particular, "height" is equivalent to the dimension from top to bottom, "width" is equivalent to the dimension from left to right, and "depth" is equivalent to the dimension from front to back. They are relative concepts and may change accordingly according to their different positions and different usage states. Therefore, these or other directions should not be interpreted as restrictive terms.

[0020] Terms related to attachment, coupling, and the like (eg, "connected" and "attached") refer to either a fixed or attached relationship between structures, either directly or indirectly, and either movable or rigid attachments or relationships, unless expressly stated otherwise, of the structures to one another through intermediate structures.

[0021] In order to achieve the above-mentioned purpose and other advantages of the utility model, the utility model provides the following technical solutions:

[0022] Figures 1 to 8 This is a schematic diagram of the structure of the solenoid valve in the utility model. The specific structure of the utility model is as follows:

[0023] The utility model provides a solenoid valve, which comprises a valve body component 100, a piston component 200, an inlet pipe 300 and a valve core 600.

[0024] Specifically, Figure 1 , Figure 3 As shown in the figure, the valve body component 100 includes a valve body 120, a valve seat 110, a valve cover 400 and a sleeve 500. The valve cover 400 is fixedly connected to the sleeve 500, one end of the valve body 120 is fixedly connected to the valve cover 400, and the other end of the valve body 120 is fixedly connected to the valve seat 110. The valve cover 400 is connected to the sleeve 500 by furnace welding, the valve seat 110 is connected to the valve body 120 by furnace welding, and finally the valve cover 400 is connected to the valve body 120 by laser welding. Compared with traditional high-frequency welding and other connection methods, it can improve the connection strength, reduce the heat impact, prevent the internal deformation of the valve body 120 due to uneven heating, and at the same time ensure the overall strength reliability of the valve body component 100, so that the product can be applied to CO 2 High pressure fluid conditions.

[0025] The valve core 600 is at least partially located in the sleeve 500, and the piston component 200 is located in the inner cavity of the valve body 120, dividing the inner cavity of the valve body 120 into two parts, the upper and lower parts. The piston component 200 includes a pilot valve channel 214, and the valve seat 110 includes a valve port end 111. In the valve closing state, the valve core 600 abuts against the piston component 200 to close the pilot valve channel 214; the piston component 200 abuts against the valve seat 110 to block the valve port end 111.

[0026] like Figure 3 , Figure 4As shown in , the valve body 120 includes a mounting hole 121, the inlet pipe 300 is fixedly connected to the valve body 120, and the inlet pipe 300 is partially located in the mounting hole 121. Along the longitudinal direction of the solenoid valve, the valve port end 111 is at a distance H from the mounting hole 121. Through the above structural design, the position height of the valve port end 111 is higher than the position of the inlet pipe 300, reducing the lateral impact force of the high-pressure fluid entering the valve cavity on the sealing position of the valve port end 111 and the piston component 200, thereby improving product reliability. Furthermore, the valve body 120 is made by turning stainless steel pipes, and the valve seat 110 is made by turning stainless steel rods, which can reduce the amount of parts processing, reduce costs, and facilitate the realization of high valve port design requirements.

[0027] Optionally, the valve body 120 and the valve seat 110 may also be manufactured by integral casting.

[0028] like Figure 2 As shown in , the piston component 200 includes a piston body 210, a sealing plug 220, and a piston ring 230. The piston body 210 is provided with a balancing channel 212, the upper end of which extends to the upper surface of the piston body 210 facing the valve core 600, and the lower end extends to the lower surface of the piston body 210 facing the valve seat 110. The balancing channel 212 maintains communication with the inner cavity of the valve body 120 located on the upper and lower sides of the piston body 210. The piston body 210 includes a receiving groove 211 on the side facing the valve port end 111, and the sealing plug 220 is at least partially located in the receiving groove 211. Specifically, the side wall of the receiving groove 211 has a notch 2111, and the notch 2111 extends to the bottom wall of the receiving groove 211. The notch 2111 serves as a part of the balancing channel 212, so that the balancing channel 212 is connected to the receiving groove 211.

[0029] Through the above structural design, the bottom wall of the receiving groove 211 and the sealing plug 220 can be connected to the balancing channel 212, which plays a role in preventing liquid sealing and preventing the liquid refrigerant from suddenly changing its state. The gap chamber on the upper side of the sealing plug 220 and the inner cavity of the valve body 120 on the lower side of the sealing plug 220 produce a pressure difference, which causes the sealing plug 220 to deform. Secondly, the balancing channel 212 is connected to the receiving groove 211, which plays the role of pressure balance and anti-liquid sealing groove, and can effectively reduce the outer diameter of the piston body 210, that is, the piston body 210 does not need additional space drilling, which is conducive to reducing the product volume and realizing the overall miniaturization design of the solenoid valve.

[0030] like Figure 5 , Figure 6As shown, the piston body 210 further includes an annular groove 2112, which is arranged on the bottom wall of the receiving groove 211, and the annular groove 2112 is communicated with the notch 2111. Such an arrangement prevents a liquid seal from occurring between the bottom wall of the entire receiving groove 211 and the sealing plug 220. Preferably, the side wall of the receiving groove 211 extends upward to form an outer wall surface of the annular groove 2112 with a larger diameter, so that the piston body 210 is easy to process, and the side wall of the receiving groove 211 and the outer wall surface of the annular groove 2112 can be processed at one time.

[0031] Preferably, Figure 7 , Figure 8 As shown in , in order to ensure a good connection effect, the maximum value of the diameter of the balance channel 212 is defined as D, and the distance between the two sides of the notch 2111 is defined as P, then 1 / 2D<P≤D is satisfied. When the sealing plug 220 is accommodated in the receiving groove 211, a portion of the balance channel 212 always remains directly connected to the inner cavity of the valve body 120 below the piston component 200.

[0032] Preferably, Figure 6 As shown, the balance channel 212 includes a large diameter section 2121 and a small diameter section 2122. Along the longitudinal direction of the solenoid valve, the small diameter section 2122 is located above the large diameter section 2121, and the notch 2111 is located at the large diameter section 2121. The small diameter design of the upper end of the balance channel 212 can play a throttling role, making it convenient for the piston component 200 to separate from the valve port end 111 by using the pressure difference.

[0033] Through the above structural design, the connecting structure of the balancing channel 212 and the containing groove 211 is simple and efficient, the containing groove 211 and the balancing channel 212 are convenient to be positioned during the processing, and the processing procedure is simple.

[0034] The side wall of the piston body 210 includes a mounting groove 213 , and the piston ring 230 is located in the mounting groove 213 . The piston ring 230 slidably cooperates with the inner wall of the valve seat 110 , thereby improving the impurity resistance performance of the solenoid valve.

[0035] Preferably, the valve body 120, the valve seat 110, the valve cover 400 and the sleeve 500 are made of stainless steel. The solenoid valve body structure made of stainless steel is lower in cost and more environmentally friendly than the traditional brass solenoid valve.

[0036] Although the implementation scheme of the utility model has been disclosed as above, it is not limited to the applications listed in the specification and implementation scheme. It can be fully applied to various fields suitable for the use of the new model. For those familiar with the art, additional modifications can be easily implemented. Therefore, without departing from the general concept defined by the claims and the scope of equivalents, the utility model is not limited to the specific details and the illustrations shown and described here.

Claims

1. A solenoid valve, comprising a valve body component (100) and a piston component (200), characterized in that: The piston component (200) is located in the inner cavity of the valve body component (100), the piston component (200) comprises a piston body (210) and a sealing plug (220), and the piston body (210) comprises a receiving groove (211) and a balancing channel (212); The upper end of the balancing channel (212) extends to the upper surface of the piston body (210), and the lower end of the balancing channel (212) extends to the lower surface of the piston body (210). The side wall of the receiving groove (211) has a notch (2111), and the notch (2111) extends to the bottom wall of the receiving groove (211). The notch (2111) serves as a part of the balancing channel (212); the sealing plug (220) is at least partially located in the receiving groove (211).

2. The solenoid valve according to claim 1, characterized in that The piston body (210) further comprises an annular groove (2112), wherein the annular groove (2112) is located on the bottom wall of the accommodating groove (211), and the annular groove (2112) is in communication with the notch (2111).

3. The solenoid valve according to claim 2, characterized in that: The side wall of the accommodating groove (211) extends to form the outer wall surface of the annular groove (2112).

4. The solenoid valve according to claim 1, characterized in that: The maximum value of the diameter of the balancing channel (212) is defined as D, and the distance between the two sides of the notch (2111) is defined as P, then 1 / 2D<P≤D is satisfied.

5. The solenoid valve according to claim 1, characterized in that: The balancing channel (212) comprises a large diameter section (2121) and a small diameter section (2122); along the longitudinal direction of the solenoid valve, the small diameter section (2122) is located above the large diameter section (2121), and the notch (2111) is located in the large diameter section (2121).

6. The solenoid valve according to any one of claims 1 to 5, characterized in that: The valve body component (100) comprises a valve seat (110) and a valve body (120), wherein the valve seat (110) is fixedly connected to the valve body (120), and the valve seat (110) comprises a valve port end (111). When the solenoid valve is in a closed state, the sealing plug (220) abuts against the valve port end (111).

7. The solenoid valve according to claim 6, characterized in that It also includes an inlet pipe (300), the valve body (120) includes a mounting hole (121), a portion of the inlet pipe (300) is located in the mounting hole (121), the inlet pipe (300) is fixedly connected to the valve body (120), and along the longitudinal direction of the solenoid valve, the valve port end (111) is at a distance H from the mounting hole (121).

8. The solenoid valve according to claim 6, characterized in that: The piston component (200) further includes a piston ring (230), and the piston body (210) includes a mounting groove (213), wherein the mounting groove (213) is located on a side wall of the piston body (210), and the piston ring (230) is located in the mounting groove (213), and the piston ring (230) is slidably matched with an inner wall of the valve seat (110).

9. The solenoid valve according to claim 6, characterized in that: The valve body component (100) further comprises a valve cover (400) and a sleeve (500); the valve cover (400) is fixedly connected to the sleeve (500); one end of the valve body (120) is fixedly connected to the valve cover (400); the other end of the valve body (120) is fixedly connected to the valve seat (110); the valve cover (400) and the sleeve (500) are connected by furnace welding; the valve cover (400) and the valve body (120) are connected by laser welding; and the valve seat (110) and the valve body (120) are connected by furnace welding.

10. The solenoid valve according to claim 9, characterized in that The valve body (120), the valve seat (110), the valve cover (400), and the sleeve (500) are made of stainless steel.

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