Pilot valve

Abstract

The utility model discloses a pilot valve, which comprises a main body, a pilot valve core, a pilot valve core, a pilot valve core, a pilot valve core, a pilot valve core and a pilot valve core, and is characterized in that the main body is internally provided with a valve cavity; the reset button is arranged on the surface of the main body and used for controlling the valve element to move so as to open or close the valve cavity; the button cap is arranged outside the reset button, is connected with the main body and is used for protecting the reset button; the reset button is arranged on the main body, a barb protruding towards the reset button is arranged at one end, close to the main body, of the button cover cap, the main body is provided with a connecting groove matched with the bottom of the reset button and a clamping groove matched with the barb, and the button cover cap is detachably connected with the main body through the barb and the clamping groove. According to the utility model, the button cap is detachably connected with the main body through the barb and the clamping groove, the connection between the button cap and the main body is reliable and stable, the structure is simple, and the installation and maintenance are convenient.

Description

Technical Field

[0001] The present application relates to the technical field of valve bodies, and particularly to a pilot valve for controlling a main valve. Background Art

[0002] A pilot valve is an auxiliary valve used to manipulate a control mechanism in other valves (such as a relatively large main valve) or components. The pilot valve has characteristics such as a relatively small input signal and can accept various input methods. During the opening process of the main valve, the medium (gas or liquid) flowing to the main valve first enters the pilot valve, and the medium passes through the pilot valve and enters the other end of the main valve, making the pressure difference at both ends of the main valve gradually tend to balance, and then the main valve opens, thereby reducing the pressure impact at both ends when the main valve opens. And the overflow pressure of the main valve can be adjusted smoothly through the pilot valve.

[0003] The pilot valve includes a reset button for controlling the opening or closing of the pilot valve. To avoid misoperation of the reset button, a cap is sleeved on the reset button. In the prior art, the cap is mainly connected to the outer shell of the pilot valve by threads or fixed to the outer shell by fasteners such as bolts. The above-mentioned cap installation method has technical problems of complex structure, inconvenience in disassembly and assembly, and processing. Summary of the Utility Model

[0004] In view of the above problems, the present application provides a pilot valve to solve the technical problems of complex structure of the above-mentioned cap, inconvenience in disassembly, assembly and processing.

[0005] To achieve the above object, the present application provides a pilot valve, including:

[0006] A main body, in which a valve cavity is provided, and a valve core is provided in the valve cavity;

[0007] A reset button, arranged on the surface of the main body, for controlling the movement of the valve core to conduct or close the valve cavity;

[0008] A button cap, arranged outside the reset button and connected to the main body, for protecting the reset button;

[0009] One end of the button cap close to the main body is provided with a barb protruding towards the reset button. The main body is provided with a connection groove adapted to the bottom of the reset button and a card slot adapted to the barb. The button cap is detachably connected to the main body through the barb and the card slot.

[0010] Further, the connection groove is an annular groove; two or more guide posts are arranged on the inner side of the connection groove, the card slot is arranged on the outer side surface of the guide post, the top of the button cap is provided with a positioning hole adapted to the top of the guide post, and the top of the guide post is inserted into the positioning hole.

[0011] Further, there are two guiding columns, and the two guiding columns are symmetrically arranged along the circumferential direction of the connecting groove.

[0012] Further, a 90-degree boss is provided on the surface of the card slot opposite to the barb, and a hook body matching the boss is provided on the inner side of the barb.

[0013] Further, an arc-shaped guiding portion is provided at the top of the guiding column, and the radius of the guiding portion gradually shrinks inward from the bottom to the top of the guiding column.

[0014] Further, more than two clamping blocks are provided on the outer side of the button cap, the top of the clamping block is connected to the top of the button cap, and the barb is arranged on the inner side of the bottom of the clamping block.

[0015] Further, more than two guiding columns are provided on the inner side of the connecting groove, the card slot is arranged on the outer side surface of the guiding column, a positioning hole adapted to the top of the guiding column is provided on the top of the button cap, and the top of the guiding column is inserted into the positioning hole;

[0016] The clamping block is arranged outside the positioning hole.

[0017] Further, a connecting rod is provided at the bottom of the reset button, and the reset button is connected to the valve core through the connecting rod.

[0018] Further, the connecting rod is connected with a compression spring, and the compression spring applies pressure to the connecting rod to apply pressure to the valve core so that the valve core closes the valve cavity.

[0019] Further, the reset button is connected with a button spring, and the button spring is used to apply an elastic force away from the main body to the reset button.

[0020] Different from the prior art, the above technical solution is provided with a barb protruding towards the reset button at one end of the button cap close to the main body, and a connecting recess adapted to the button cap and a card slot adapted to the barb are provided on the main body of the pilot valve. The button cap is detachably connected to the main body through the barb and the card slot. In the above technical solution, the connection between the button cap and the main body is reliable and stable, and the structure is simple, which is convenient for installation and maintenance.

[0021] The relevant descriptions of the above-mentioned utility model content are only an overview of the technical solution of this application. In order to enable those of ordinary skill in the art to more clearly understand the technical solution of this application, and thus be able to implement it based on the content described in the specification and the accompanying drawings, and in order to make the above-mentioned purpose, other purposes, features and advantages of this application more easily understood, the following is described in conjunction with the specific embodiments of this application and the accompanying drawings. BRIEF DESCRIPTION OF THE DRAWINGS

[0022] The accompanying drawings are only used to illustrate the principles, implementation methods, applications, features and effects of the specific embodiments of this application and other related contents, and should not be considered as a limitation to this application.

[0023] In the accompanying drawings of the specification:

[0024] Figure 1 is a schematic structural diagram of the pilot valve described in the specific embodiment;

[0025] Figure 2 is an exploded view of the structure of the pilot valve described in the specific embodiment;

[0026] Figure 3 is a sectional view of the pilot valve described in the specific embodiment;

[0027] Figure 4 is a schematic structural diagram of the button cap described in the specific embodiment;

[0028] The descriptions of the reference numerals involved in the above-mentioned accompanying drawings are as follows:

[0029] 1, main body; 11, mounting hole; 12, guide post; 121, card slot; 122, connecting groove; 13, valve cavity; 14, fixing hole;

[0030] 2, button cap; 21, positioning hole; 22, clamping block; 221, barb; 23, operation hole;

[0031] 3, reset button;

[0032] 4, compression spring;

[0033] 5, connecting rod;

[0034] 6, button spring; 7, valve core; SPECIFIC EMBODIMENTS

[0035] In order to illustrate in detail the possible application scenarios, technical principles, specific implementable solutions, achievable purposes and effects, etc. of this application, the following is described in detail with reference to the specific examples listed and in conjunction with the accompanying drawings. The embodiments described herein are only used to more clearly illustrate the technical solutions of this application, so they are only used as examples and cannot be used to limit the protection scope of this application.

[0036] Reference to "embodiment" in this document means that the specific features, structures or characteristics described in connection with the embodiment may be included in at least one embodiment of the present application. The term "embodiment" appearing at various positions in the specification does not necessarily refer to the same embodiment, nor does it particularly limit its independence or relevance to other embodiments. In principle, in the present application, as long as there is no technical contradiction or conflict, the various technical features mentioned in each embodiment can be combined in any way to form corresponding implementable technical solutions.

[0037] Unless otherwise defined, the meanings of the technical terms used in this document are the same as those commonly understood by those skilled in the technical field to which this application belongs; the use of the relevant terms in this document is only for describing specific embodiments and is not intended to limit this application.

[0038] In the description of this application, the phrase "and / or" is an expression used to describe the logical relationship between objects, indicating that three relationships may exist. For example, A and / or B means: the existence of A, the existence of B, and the simultaneous existence of both A and B. In addition, the character " / " in this document generally represents an "or" logical relationship between the associated objects before and after.

[0039] In this application, terms such as "first" and "second" are only used to distinguish one entity or operation from another entity or operation, and do not necessarily require or imply any actual quantitative, primary or secondary, or sequential relationships between these entities or operations.

[0040] Without further limitation, in this application, the use of "including", "comprising", "having" or other similar expressions in a statement is intended to cover non-exclusive inclusion. These expressions do not exclude the possibility that there may be additional elements in the process, method or product including the said elements, such that a process, method or product including a series of elements may include not only those defined elements, but also other elements not explicitly listed, or elements inherent to such process, method or product.

[0041] The same as the understanding in the "Examination Guidelines", in this application, expressions such as "greater than", "less than", "exceeding" are understood not to include the number itself; expressions such as "above", "below", "within" are understood to include the number itself. In addition, in the description of the embodiments of this application, the meaning of "a plurality of" is two or more (including two), and similar expressions related to "many" are also understood in this way, such as "multiple groups", "multiple times", etc., unless otherwise specifically defined.

[0042] In the description of the embodiments of the present application, the spatially related expressions used, such as "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "perpendicular", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., the indicated orientation or positional relationship is based on the orientation or positional relationship shown in the specific embodiment or the attached drawings. It is only for the convenience of describing the specific embodiments of the present application or facilitating the understanding of the reader, rather than indicating or implying that the device or component referred to must have a specific position, a specific orientation, or be constructed or operated in a specific orientation. Therefore, it should not be construed as a limitation to the embodiments of the present application.

[0043] Unless otherwise clearly specified or limited, in the description of the embodiments of the present application, the terms "installed", "connected", "joined", "fixed", "set", etc. should be understood in a broad sense. For example, the "connection" can be a fixed connection, a detachable connection, or an integral setting; it can be a mechanical connection, an electrical connection, or a communication connection; it can be directly connected, or indirectly connected through an intermediate medium; it can be the communication inside two components or the interaction relationship between two components. For those skilled in the technical field to which the present application pertains, the specific meanings of the above terms in the embodiments of the present application can be understood according to specific circumstances.

[0044] Please refer to Figures 1 to 4 , this embodiment provides a pilot valve. This pilot valve can be used together with the main valve to control the opening of the main valve. When in use, the medium such as gas or liquid flowing through one end of the main valve first flows into the pilot valve. The pilot valve opens under the pressure of the medium, allowing the medium to flow into the other end of the main valve. When the pressures at both ends of the main valve are close or equal (that is, the pressure difference at both ends of the main valve gradually tends to balance), then the main valve opens. Therefore, the pressure impact at both ends when the main valve opens can be reduced. This pilot valve can be used in control systems for different media such as gas and liquid (such as water, hydraulic oil).

[0045] As Figure 1 shown, the pilot valve of this embodiment includes a main body 1, a reset button 3, and a button cap 2.

[0046] A valve cavity 13 is provided inside the main body 1, and a valve core 7 is provided inside the valve cavity. The reset button 3 is arranged on the surface of the main body 1 and is used to control the movement of the valve core 7 to open or close the valve cavity. An installation hole 11 is provided on the surface of the main body 1, and the reset button 3 is installed in the installation hole.

[0047] As Figure 1 shown, a fixing hole 14 for installing this pilot valve is also provided on the main body. The pilot valve can be fixedly installed through fasteners such as bolts, so that the pilot valve is fixedly connected to other parts in the system.

[0048] The button cap 2 is disposed outside the reset button 3 and connected to the main body 1. The button cap 2 is used to protect the reset button 3. One end of the button cap 2 close to the main body 1 is provided with a barb 221 protruding towards the reset button 3. The main body 1 is provided with a connecting groove 122 adapted to the bottom of the reset button 3 and a clamping groove 121 adapted to the barb 221. The button cap 2 is detachably connected to the main body 1 through the barb 221 and the clamping groove 121.

[0049] As Figure 2 shown, a connecting rod 5 is provided at the bottom of the reset button 3. The reset button 3 is connected to the valve core 7 through the connecting rod 5. The connecting rod 5 is connected with a compression spring 4. The compression spring 4 applies a pressure to the connecting rod 5 to apply a pressure to the valve core 7 so that the valve core 7 closes the valve cavity 13. The reset button 3 is connected with a button spring 6. The button spring 6 is used to apply an elastic force to the reset button 3 away from the main body.

[0050] The button cap 2 can be made of plastic. An operation hole 23 adapted to the reset button 3 is provided at the top of the button cap 2. The operation hole 23 is opposite to the top of the reset button 3. The reset button 3 can be operated through the operation hole 23, including pressing down the reset button 3. The reset button 3 pushes the valve core 7 through the connecting rod 5, so that the state of the valve core 7 changes (for example, the valve core 7 conducts or closes the valve cavity). In some embodiments, a dent (such as a flat slot, a cross slot or an internal hexagonal slot) for rotating the reset button 3 is provided at the top of the reset button 3. By rotating the reset button 3, the opening angle of the valve core 7 can be adjusted, so as to realize fine adjustment of the position of the valve core 7.

[0051] As Figure 1 and Figure 2 shown, the connecting groove 122 is an annular groove; two or more guiding columns 12 are provided on the inner side of the connecting groove 122. The clamping groove 121 is provided on the outer side surface of the guiding column 12. A positioning hole 21 adapted to the top of the guiding column 12 is provided at the top of the button cap 2. The top of the guiding column 12 is inserted into the positioning hole 21.

[0052] An outer shell is provided outside the above-mentioned main body 1. The connecting groove 122 and the guiding columns 12 are provided on the outer shell.

[0053] In this embodiment, at one end of the button cap 2 close to the main body 1, there is a barb 221 protruding towards the reset button 3, and on the main body 1 of the pilot valve, there is a connecting recess adapted to the button cap 2 and a card slot 121 adapted to the barb 221. The button cap 2 is detachably connected to the main body 1 through the barb 221 and the card slot 121. In the above technical solution, the connection between the button cap 2 and the main body 1 is reliable and stable, and the structure is simple, facilitating installation and maintenance.

[0054] As Figure 1 and Figure 2 shown, in this embodiment, there are two guiding columns 12, and the two guiding columns 12 are symmetrically arranged along the circumferential direction of the connecting groove 122.

[0055] In other embodiments, the guiding columns 12 can also be three, four or more, and multiple guiding columns 12 can be evenly distributed in the circumferential direction of the connecting groove 122. The guiding columns 12 can play a role in positioning the relative positions of the button cap 2 and the main body 1, and avoiding the circumferential rotation of the button cap 2.

[0056] As Figure 3 shown, in this embodiment, on the surface of the card slot 121 opposite to the barb 221, there is a 90-degree convex platform, and on the inner side of the barb 221, there is a hook body adapted to the convex platform.

[0057] In this embodiment, both the card slot 121 and the barb 221 have 90-degree adapted convex platforms or contact surfaces, so the connection reliability after the card slot 121 and the barb 221 are snapped in can be ensured. The card slot 121 and the barb 221 in this application are not limited to the above-mentioned 90-degree convex platform snap connection structure. The convex platform of the card slot 121 can also be a convex platform less than 90 degrees. Correspondingly, the inner side of the barb 221 can also be an acute-angle barb 221 structure.

[0058] As As Figures 1 to 3 shown, at the top of the guiding column 12, there is an arc-shaped guiding portion, and the radius of the guiding portion gradually shrinks inwards from the bottom to the top of the guiding column 12. That is, the outer side of the top of the guiding column 12 is chamfered or cut by an arc, so as to form the above-mentioned guiding portion, and this guiding portion can make the top of the guiding column 12 easier to align and insert into the positioning hole 21.

[0059] As Figure 1 、 Figure 2 、 Figure 3 and Figure 4 shown, on the outer side of the button cap 2, there are more than two snap blocks 22. The top of the snap block 22 is connected to the top of the button cap 2, and the barb 221 is arranged on the inner side of the bottom of the snap block 22.

[0060] Specifically, more than two guiding columns 12 are arranged inside the connecting groove 122, the clamping groove 121 is arranged on the outer side surface of the guiding column 12, a positioning hole 21 adapted to the top of the guiding column 12 is arranged on the top of the button cap 2, and the top of the guiding column 12 is inserted into the positioning hole 21; the clamping block 22 is arranged outside the positioning hole 21.

[0061] The clamping block 22 can be integrally formed with the button cap 2. The top of the clamping block 22 is connected to the top of the button cap 2, while the bottom of the clamping block 22 (i.e., the end close to the main body 1) is separated from the button cap 2. Therefore, the clamping block 22 has a certain elasticity along the radial direction of the button cap 2. When the barb 221 cooperates with the clamping groove 121, the elasticity of the clamping block 22 can make the barb 221 tightly press against the clamping groove 121, so as to be firmly clamped with the clamping groove 121.

[0062] Finally, it should be noted that although the above embodiments have been described in the text and drawings of the specification of the present application, the patent protection scope of the present application cannot be limited thereby. Any technical solution obtained by equivalent structure or equivalent process substitution or modification based on the essential concept of the present application and using the content recorded in the text and drawings of the specification of the present application, as well as any technical solution directly or indirectly implementing the above embodiments in other related technical fields, are all included in the patent protection scope of the present application.

Claims

1. A pilot valve, characterized in that: include: A main body, wherein a valve cavity is disposed in the main body, and a valve core is disposed in the valve cavity; A reset button, disposed on the surface of the main body, for controlling the movement of the valve core to open or close the valve cavity; A button cap, disposed outside the reset button and connected to the main body, for protecting the reset button; The button cap is provided with a barb protruding toward the reset button at one end close to the main body, and the main body is provided with a connecting groove adapted to the bottom of the reset button, and a card slot adapted to the barb, and the button cap is detachably connected to the main body via the barb and the card slot.

2. The pilot valve according to claim 1, characterized in that: The connecting groove is a circular groove; more than two guide columns are arranged on the inner side of the connecting groove, the card slot is arranged on the outer side of the guide column, and the top of the button cap is provided with a positioning hole adapted to the top of the guide column, and the top of the guide column is inserted into the positioning hole.

3. The pilot valve according to claim 2, characterized in that: There are two guide posts, and the two guide posts are symmetrically arranged along the circumference of the connecting groove.

4. The pilot valve according to claim 1 or 2, characterized in that: A 90-degree boss is arranged on the surface of the clamping slot opposite to the barb, and a hook body matched with the boss is arranged on the inner side of the barb.

5. The pilot valve according to claim 2, characterized in that: An arc-shaped guiding portion is arranged on the top of the guide column, and the radius of the guiding portion gradually decreases inwardly from the bottom to the top of the guide column.

6. The pilot valve according to claim 1, characterized in that: More than two clamping blocks are arranged on the outer side of the button cover cap, the top of the clamping block is connected to the top of the button cover cap, and the barb is arranged on the inner side of the bottom of the clamping block.

7. The pilot valve according to claim 6, characterized in that: The inner side of the connecting groove is provided with two or more guide posts, the card slot is provided on the outer side of the guide post, the top of the button cap is provided with a positioning hole adapted to the top of the guide post, and the top of the guide post is inserted into the positioning hole; The clamping block is arranged on the outer side of the positioning hole.

8. The pilot valve according to claim 1, characterized in that: A connecting rod is provided at the bottom of the reset button, and the reset button is connected to the valve core through the connecting rod.

9. The pilot valve according to claim 8, characterized in that: The connecting rod is connected to a compression spring, and the compression spring applies pressure to the connecting rod so that the connecting rod applies pressure to the valve core so that the valve core closes the valve cavity.

10. The pilot valve according to claim 1, characterized in that: The reset button is connected to a button spring, and the button spring is used to apply an elastic force to the reset button away from the main body.

Images