Water valve
By designing a water valve including the main valve body, the main valve core, the main spring, the pilot valve seat, the pilot valve core and the pilot valve body, the pilot sealing surface and the main sealing moving surface are used to combine the pressure difference generated by the throttle hole, The water valve is cut off and conduction, which solves the problems of easy stagnation, wear and corrosion of the control components of traditional high-pressure water cleaning equipment, and realizes a water valve with high reliability and long service life.
Patent Information
- Application Number
- CN202323479864.X
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2023-12-20
- Publication Date
- 2025-02-07
- Estimated Expiration
- 2033-12-20
AI Technical Summary
The control components of traditional high-pressure water cleaning equipment are prone to problems such as stagnation, wear, and corrosion of parts. Especially after long-term shutdown, moving parts are prone to scale and stuck, which is difficult to effectively solve.
A water valve is designed, which includes a main valve body, a main valve core, a main spring, a pilot valve seat, a pilot valve core and a pilot valve body. Through the cooperation of the pilot valve core and the pilot valve seat and the cooperation of the main valve core and the main valve body, a pilot sealing surface and a main sealing moving surface are formed, and the pressure difference generated by the throttle hole is used to achieve the cutting and conduction of the water valve.
The water valve is simple in structure, has a low failure rate and a long service life. It can effectively avoid problems such as stagnation, wear, and corrosion of parts, especially after long-term shutdown, which can maintain good sealing performance.
Smart Images
Figure CN222437050U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to a water system, and more particularly to a water valve. Background Art
[0002] People's requirements for environmental cleanliness are always increasing. High-pressure water cleaning equipment, which has developed from low-pressure water cleaning in the past, has many advantages such as environmental friendliness, convenience and speed, and its application is becoming more and more extensive. With the expansion of its application, this high-pressure equipment has also exposed some problems, such as heavy equipment, many pipelines, and high failure rate of control components. Therefore, the development of lightweight, compact, automated, highly reliable equipment that can operate at multiple points at the same time has become a major trend. High-pressure control water valves are the key elements in these links, and thus the pilot high-pressure water valve was born.
[0003] Traditional high-pressure water cleaning equipment generally uses ordinary ball valves or other types of modified valves. In an environment with diverse water quality, problems such as component jamming, wear, and corrosion are prone to occur. In particular, it is difficult to effectively solve the problem of long-term shutdown and scaling and jamming of moving parts. Utility Model Content
[0004] In order to solve the problems of high failure rate of control components of high-pressure water equipment in the above-mentioned prior art, the utility model provides a water valve.
[0005] According to the water valve of the utility model, it includes a main valve body, a main valve core, a main spring, a pilot valve seat, a pilot valve core and a pilot valve body, wherein the pilot valve body is fixed in the main valve body, the pilot valve seat is fixed inside the main valve body, the pilot valve core moves in the pilot valve body under the action of the pilot valve body and cooperates with the pilot valve seat, the pilot valve core and the pilot valve seat are combined to form a pilot sealing surface, and the gap after the pilot valve core and the pilot valve seat are separated forms a pilot water flow channel, the main spring is located between the pilot valve seat and the main valve core, the main valve core moves in the main valve body under the action of the spring force provided by the main spring and cooperates with the main valve body, the main valve core and the main valve body are combined to form a main sealing dynamic surface, and the gap after the main valve core and the main valve body are separated forms a main water flow channel, and the main valve core is provided with a throttling hole on the side away from the pilot valve body, the throttling hole connects the pilot water flow channel and the main water flow channel to realize the cutting and conducting of the water valve through the pressure difference.
[0006] Preferably, a sealing groove is formed on the side of the main valve core, and a sealing member is installed in the sealing groove to surround the main valve core and act on the main valve body to form a main sealing static surface.
[0007] Preferably, the sealing member is a composite static sealing member composed of an O-ring and multiple retaining rings.
[0008] Preferably, the diameter of the main seal dynamic surface is D1, the diameter of the main seal static surface is D2, and 0.91 <D1:D2<0.99。
[0009] Preferably, the conical surface of the main valve core cooperates with the conical surface of the main valve body to form a main sealing dynamic surface.
[0010] Preferably, the matching cone angle of the main valve core does not exceed 30°.
[0011] Preferably, the length of the sealing line of the main sealing dynamic surface is greater than 4 mm.
[0012] Preferably, the main valve core and the main valve body are both made of hard metal, and the main sealing dynamic surface adopts a hard-on-hard sealing structure.
[0013] Preferably, the pilot valve core is a stainless steel hard core, the pilot valve seat is a soft plastic seat, and the pilot sealing surface adopts a hard-to-soft sealing structure.
[0014] Preferably, the pilot valve body is an electric valve body or a pneumatic valve body.
[0015] According to the water valve of the present invention, the pilot valve core leaves the pilot valve seat under the action of the pilot valve body to form a pilot water flow channel, and the pressure difference generated by the throttle hole causes the main valve core to leave the main valve body to form a main water flow channel, and the water valve opens; conversely, the pilot valve core combines with the pilot valve seat to form a pilot sealing surface, and the main valve core combines with the main valve body under the action of the spring force provided by the main spring to form a main sealing dynamic surface, thereby cutting off the water flow and closing the water valve; the structure is simple, the failure rate is low, and the service life is long. BRIEF DESCRIPTION OF THE DRAWINGS
[0016] Figure 1 It is a schematic diagram of the overall structure of a water valve according to a preferred embodiment of the utility model.
[0017] Figure 2 Show Figure 1 The main water flow channel and the pilot water flow channel of the water valve.
[0018] Figure 3 It is a schematic diagram of the overall structure of a water valve according to another preferred embodiment of the utility model.
[0019] Figure 4 Show Figure 3 The main water flow channel and the pilot water flow channel of the water valve. DETAILED DESCRIPTION
[0020] The preferred embodiments of the present utility model are given below in conjunction with the accompanying drawings and described in detail.
[0021] like Figure 1-Figure 2 As shown, the water valve according to a preferred embodiment of the utility model is an electric pilot water valve, which includes a main valve body 1 and a pilot valve body 7 , wherein the pilot valve body 7 is an electric valve body fixed in the main valve body 1 .
[0022] like Figure 1-Figure 2As shown, the water valve according to this embodiment further includes a pilot valve seat 5 and a pilot valve core 6, wherein the pilot valve seat 5 is fixed inside the main valve body 1, and the pilot valve core 6 moves in the pilot valve body 7 and cooperates with the pilot valve seat 5 under the action of the electromagnetic force provided by the pilot valve body 7. Specifically, the pilot valve core 6 and the pilot valve seat 5 are combined to form a pilot sealing surface P, and the gap after the pilot valve core 6 and the pilot valve seat 5 are separated forms a pilot water flow channel AC, so that the pilot water is controlled through the pilot valve body 7. In this embodiment, the pilot valve core 6 is a stainless steel hard core, the pilot valve seat 5 is a soft plastic seat, and the pilot sealing surface P adopts a hard-to-soft sealing structure.
[0023] like Figure 1-Figure 2 As shown, the water valve according to this embodiment also includes a main valve core 3 and a main spring 4, wherein the main spring 4 is located between the pilot valve seat 5 and the main valve core 3, and the main valve core 3 moves in the main valve body 1 and cooperates with the main valve body 1 under the action of the spring force provided by the main spring 4.
[0024] The main valve core 3 is combined with the main valve body 1 to form a main sealing dynamic surface M. The gap between the main valve core 3 and the main valve body 1 forms a main water flow channel B, so that the main water flow is controlled by the main valve core 3. The main valve core 3 is provided with a throttle hole 2 on the side away from the pilot valve body 7, which connects the pilot water flow channel AC and the main water flow channel B to realize the opening or cutting off of the main water flow, thereby realizing the cutting off and conducting of the water valve. In this embodiment, the throttle hole 2 is located at the center of the main valve core 3. In this embodiment, the conical surface of the main valve core 3 cooperates with the conical surface of the main valve body 1 to form the main sealing dynamic surface M. In this embodiment, the main valve core 3 and the main valve body 1 are both hard metals, and the main sealing dynamic surface M adopts a hard-to-hard sealing structure.
[0025] The main valve core 3 and the main valve body 1 also form a main sealing static surface N. Specifically, a sealing groove is opened on the side of the main valve core 3, and the sealing member is installed in the sealing groove to be arranged around the main valve core 3 and act on the main valve body 1 to form a seal. In this embodiment, the sealing member is an O-type multi-block composite static seal, that is, a sealing method in which an O-ring is centered, a retaining ring is added on one side, and two or more retaining rings are added on the other side. The number of retaining rings is at least two, for example, a single O-ring is equipped with 3 to 8 retaining rings. The main sealing static surface N overcomes the practice of placing only one retaining ring on one side of the traditional O-ring. The retaining ring is made of polytetrafluoroethylene, which is non-corrosive and has low friction. Multiple retaining rings are stacked and used to have a certain sealing effect. At the same time, the O-ring has a complete sealing effect. The combination of the two makes the main valve core 3 move freely, has low friction, and has a long service life.
[0026] like Figure 3-Figure 4 As shown, the water valve according to another preferred embodiment of the utility model is a pneumatic pilot water valve, and its pilot valve body 7 is a pneumatic valve body fixed in the main valve body 1, so as to drive the pilot valve core 6 to move in the pilot valve body 7 by pneumatic force. The other structures are the same as those in the previous embodiment and will not be repeated here.
[0027] In the normal state (not working) when the pilot valve body 7 is not powered or ventilated, the pilot valve core 6 is pressed down on the pilot valve seat 5. The contact surface between the pilot valve core 6 and the pilot valve seat 5 forms the pilot sealing surface P. The main valve core 3 is pressed down on the main valve body 1 under the action of the main spring 4. The contact surface between the main valve core 3 and the main valve body 1 forms the main sealing dynamic surface M, and the contact surface between the sealing element and the main valve body 1 forms the main sealing static surface N. The diameter of the main sealing dynamic surface M is D1, and the diameter of the main sealing static surface N is D2. At this time, the high-pressure water (along the Figure 2 A line) flows in, passes through the throttle hole 2, and fills the cavity in the main valve core 3. Due to the main sealing dynamic surface M, the main sealing static surface N, and the pilot sealing surface P, the high-pressure water cannot flow out.
[0028] When the pilot valve body 7 is powered or ventilated, the pilot valve core 6 moves upward, the pilot valve core 6 and the pilot valve seat 5 are out of contact, the pilot sealing surface P opens, and the pilot water flows out through the throttle hole 2 along the gap between the pilot valve core 6 and the pilot valve seat 5. Figure 2 and Figure 4 As shown by the pilot water flow line AC in the figure. Since the throttle hole 2 is a slender hole structure, during the water flow, the pressure P1 at the inlet 13 of the throttle hole 2 and the pressure P2 at the outlet 14 will produce a pressure difference, P1>P2. Under the action of this pressure difference, the main valve core 3 overcomes the force of the main spring 4 and moves upward, the main sealing surface M opens, and a large flow of high-pressure water flows out from the main sealing surface M, as shown in the figure. Figure 2 and Figure 4 As shown in the main water flow line B.
[0029] It can be seen that according to the water valve of the utility model, the pilot valve body 7 is energized or ventilated, the pilot valve core 6 moves after obtaining the force, the pilot sealing surface P opens, and the pilot water flow AC is formed. When passing through the throttle hole 2, a pressure difference is generated at both ends of the main valve core 3, P1>P2, the main valve core 3 opens, the main water flow B flows, and the water valve opens; on the contrary, the pilot valve body 7 is not energized or ventilated, the pilot valve core 6 does not obtain the force, automatically resets, closes the pilot sealing surface P, cuts off the pilot water flow AC, the water flow in the throttle hole 2 does not flow, the pressure difference at both ends of the main valve core 3 disappears, P1=P2, the main valve core 3 moves under the action of the main spring 4, closes the main sealing dynamic surface M, the main water flow B is cut off, and the water valve is closed.
[0030] The cleanliness of the medium water is not high, and there are always some fine hard particles in the water, and the lubricity is also not good. The main sealing dynamic surface M is in a hard contact state. When the main spool 3 is in the closed state and bears high pressure, if D1:D2>0.99 or D1:D2<0.91, the main spool 3 is subjected to the combined downward pressure of a certain water pressure and the spring 4, and the main sealing dynamic surface M will be damaged by indentation. Moreover, there will always be vibrations during the operation of any system. The main spool 3 is a moving part, and there is a certain amplitude during actual operation. When the amplitude is large, the fluctuation gap of the main sealing dynamic surface M is large, and the water leakage is serious. When the amplitude is small, the fluctuation gap of the main sealing dynamic surface M is small, and the pressure loss of the main sealing surface is seriously damaged, and the water leakage is fast, and the water valve cannot be used. In particular, D2 of the main spool 3 of the present invention is only slightly larger than D1, 0.91<D1:D2<0.99. In this way, regardless of the water pressure, the main spool 3 is always closely attached to the main valve body 1, forming a micro-static pressure balance, and the downward pressure is not large, and the main sealing dynamic surface M will not be damaged. Therefore, the main spool 3 of the present invention is also called a balanced spool. Preferably, the length of the sealing line of the main sealing dynamic surface M formed by the main spool 3 and the main valve body 1 of the present invention is more than 4 mm, forming a sealing structure with a large covering amount, good sealing effect and not easy to be damaged. Therefore, the main spool 3 of the present invention is also called a large-covering spool. More preferably, the mating taper angle of the main spool 3 of the present invention is very small, less than or equal to 30°. Even if the main spool 3 has a slight amplitude, it will not form a large gap and directly leak water. Therefore, the main spool 3 of the present invention is also called a small-taper-angle spool.
[0031] The above are only the preferred embodiments of the present invention, and are not intended to limit the scope of the present invention. Various changes can be made to the above embodiments of the present invention. That is, all simple, equivalent changes and modifications made according to the claims and the content of the specification of the present invention application fall within the scope of the claims of the present invention patent. The content not described in detail in the present invention is all conventional technical content.
Claims
1. A water valve, characterized in that: The water valve comprises a main valve body, a main valve core, a main spring, a pilot valve seat, a pilot valve core and a pilot valve body, wherein the pilot valve body is an electric valve body or a pneumatic valve body fixed in the main valve body, the pilot valve seat is a soft plastic seat fixed inside the main valve body, the pilot valve core is a stainless steel hard core and moves in the pilot valve body and cooperates with the pilot valve seat under the force of the pilot valve body, the pilot valve core and the pilot valve seat are combined to form a pilot sealing surface with a hard-to-soft sealing structure, the gap after the pilot valve core and the pilot valve seat are separated forms a pilot water flow channel, the main spring is located between the pilot valve seat and the main valve core, and the hard metal main valve The core moves in the hard metal main valve body and cooperates with the main valve body under the action of the spring force provided by the main spring. The main valve core and the main valve body are combined to form a main sealing dynamic surface with a hard-to-hard sealing structure. A sealing groove is provided on the side of the main valve core. A composite static seal of an O-ring and multiple retaining rings is installed in the sealing groove to surround the main valve core and act on the main valve body to form a main sealing static surface. The gap after the main valve core is separated from the main valve body forms a main water flow channel. The main valve core is provided with a throttling hole on the side away from the pilot valve body. The throttling hole connects the pilot water flow channel and the main water flow channel to achieve the cutting off and conducting of the water valve through the pressure difference.
2. The water valve according to claim 1, characterized in that: The diameter of the main seal dynamic surface is D1, the diameter of the main seal static surface is D2, 0.91 <D1:D2<0.99。 3. The water valve according to claim 1, characterized in that: The conical surface of the main valve core cooperates with the conical surface of the main valve body to form a main sealing dynamic surface.
4. The water valve according to claim 3, characterized in that: The matching cone angle of the main valve core does not exceed 30°.
5. The water valve according to claim 1, characterized in that: The length of the sealing line of the main sealing dynamic surface is more than 4mm.