An inner balance type pneumatic control high pressure sewage two-position three-way reversing ball valve structure

Abstract

The application discloses a kind of inner balanced air control high-pressure sewage two-position three-way reversing ball valve structures, comprising: valve seat, valve ball and valve ball support sleeve are installed in valve body;Valve stem sealing sleeve is coaxially connected with the right end of valve body, valve stem sealing sleeve is equipped with the valve stem that is slidingly sealed with it in left and right directions, the left end of valve stem is coaxially fixedly connected with connecting rod, connecting rod extends through the right mouth of valve seat and is connected with valve ball;Actuator is used to push valve stem left or right;First action surface is formed with high-pressure water contact in the connecting end of valve ball and connecting rod, the force generated by high-pressure water acting on first action surface is F1, F1 direction is left;Second action surface is formed with high-pressure water contact in the connecting end of valve stem and connecting rod, the force generated by high-pressure water acting on second action surface is F2, F2 direction is right, F1 and F2 are similar or equal.The application adopts the mode of inner balance, without feedback piston and external balance pipe, its structure is simple, processing installation is more convenient.

Description

TECHNICAL FIELD

[0001] The application relates to the technical field of reversing valves, in particular to an internal balance type air control high-pressure sewage two-position three-way reversing ball valve structure. BACKGROUND

[0002] High-pressure oil is basically used in the oil hydraulic system of various engineering machinery, and the leakage of high-pressure hydraulic oil does not meet the environmental protection requirements. In addition, the hydraulic oil also has a flash point, and the atomized hydraulic oil under high temperature and high pressure is easy to burn, which brings safety hazards. For the oil hydraulic system with large flow, the cost of hydraulic oil is also high.

[0003] Under this situation, the water hydraulic system driven by water emerges as the times require, and the water hydraulic system is safer and more environmentally friendly than the oil hydraulic system. The water hydraulic system uses water as power, and the cleanliness of water is very high, and the sealing performance of the valve is also higher.

[0004] The applicant applied for an invention patent for an air control high-pressure balanced sewage two-position three-way reversing ball valve structure on June 15, 2023, and the application number is 2023107076373. The reversing ball valve of the scheme can be well applied in the water hydraulic system, and has the characteristics of good sealing performance, fast response speed and large flow.

[0005] However, in the technical scheme, in order to realize the direction switching of large flow high-pressure water with small force, a feedback piston and an external balance pipe are designed. Specifically, a cavity C is formed in the high-pressure water wellhead joint, a feedback piston sealing sleeve is formed at the right end of the feedback piston to form a closed cavity D, and the cavity C and the cavity D are communicated through the balance pipe.

[0006] Due to the above design idea, the structure of the reversing ball valve is relatively complex.

[0007] On this basis, the applicant further researches and improves, and proposes an internal balance type air control high-pressure sewage two-position three-way reversing ball valve structure which is simple in structure and convenient in machining and installation. SUMMARY

[0008] The purpose of the application is to provide an internal balance type air control high-pressure sewage two-position three-way reversing ball valve structure which is simple in structure and convenient in machining and installation.

[0009] To solve the above technical problems, the application adopts the following technical scheme:

[0010] An internal balance type air control high-pressure sewage two-position three-way reversing ball valve structure, comprising a valve seat, a valve ball, a valve ball support sleeve, a valve body, a valve rod sealing sleeve, a valve rod and an actuator.

[0011] The valve seat, the valve ball and the valve ball supporting sleeve are installed in the valve body, and the axial direction of the valve seat and the valve body is the left-right direction; the valve seat is provided with three ports, including the valve seat left port and the valve seat right port respectively located at the left and right ends of the valve seat, and the valve seat middle port located in the middle of the valve seat;

[0012] The valve body is provided with the A port at the left position, and the A port is communicated with the valve seat middle port; the valve body is provided with the P port at the right position, and the P port is communicated with the valve seat right port;

[0013] The water return interface is connected with the left end of the valve body, and the water return interface is the B port, which is communicated with the valve seat left port;

[0014] The valve rod sealing sleeve is coaxially connected with the right end of the valve body, and the valve rod sealing sleeve is provided with the valve rod in sliding sealing cooperation in the left-right direction; the left end of the valve rod is coaxially fixedly connected with the connecting rod, and the connecting rod extends through the valve seat right port and is connected with the valve ball;

[0015] The actuator is connected with the valve rod and is used for pushing the valve rod to move leftward or rightward;

[0016] The high-pressure water enters the P port, and a first action surface in contact with the high-pressure water is formed at the connecting end of the valve ball and the connecting rod; a force F1 generated by the high-pressure water acting on the first action surface is directed leftward; a second action surface in contact with the high-pressure water is formed at the connecting end of the valve rod and the connecting rod; a force F2 generated by the high-pressure water acting on the second action surface is directed rightward; the areas of the first action surface and the second action surface are similar or equal, so that the F1 and the F2 are similar or equal;

[0017] When the actuator pushes the valve rod to move leftward, the valve rod drives the valve ball to move leftward and seal the valve seat left port; at this time, the P port is communicated with the A port, and the B port is cut off;

[0018] When the actuator pushes the valve rod to move rightward, the valve rod drives the valve ball to move leftward and seal the valve seat right port; at this time, the A port is communicated with the B port, and the P port is cut off.

[0019] Further, the actuator is a pneumatic cylinder.

[0020] Further, the piston rod of the pneumatic cylinder is connected with the valve rod, and the cylinder barrel of the pneumatic cylinder is coaxially connected with the valve rod sealing sleeve;

[0021] The cylinder barrel forms a left chamber at the left side of the piston, and the cylinder barrel is provided with the gas port b, and the gas port a is communicated with the left chamber;

[0022] The cylinder barrel forms a right chamber at the right side of the piston, and the cylinder barrel is provided with the gas port a, and the gas port b is communicated with the right chamber;

[0023] The gas port a and the gas port b are connected with the gas pressure system.

[0024] Further, the cylinder barrel of the pneumatic cylinder is coaxially connected with the valve rod sealing sleeve through the mounting sleeve, and the mounting sleeve is further provided with the collecting hole D.

[0025] Further, the actuating mechanism is a hydraulic cylinder or an electric cylinder.

[0026] Further, the valve rod and the valve rod sealing sleeve are sealed by lubricating oil or packing.

[0027] Further, the valve seat is symmetrically arranged left and right.

[0028] Further, the A port and the P port on the valve body are radially arranged.

[0029] Further, the diameter of the valve rod is larger than that of the connecting rod, and the valve rod and the connecting rod are in an integral structure.

[0030] Further, the valve ball fixing sleeve is arranged on the connecting rod.

[0031] The beneficial effects of the present application are:

[0032] 1. The present application has similar or equal areas of the first acting surface and the second acting surface, so that F1 and F2 are similar or equal. Since the directions of F1 and F2 are opposite, the two forces will cancel each other out, so that the actuating mechanism only needs a small force to move the valve rod left or right to realize the switching of high-pressure water.

[0033] The present application adopts the above-mentioned internal balance mode, without feedback pistons and external balance pipes, and has a simple structure, and is more convenient to process and install.

[0034] 2. The reversing ball valve has reliable sealing performance, has a low requirement for the cleanliness of water, and can be used for sewage reversing valves. Meanwhile, the reversing ball valve has the characteristics of fast response speed and large flow. BRIEF DESCRIPTION OF DRAWINGS

[0035] Figure 1 is a structural schematic diagram of the first embodiment of the present application;

[0036] Figure 2 is a partial structural schematic diagram of the second embodiment of the present application.

[0037] The drawings are only used for illustrative description, and cannot be understood as a limitation on the present patent; in order to better illustrate the embodiments, some components in the drawings may be omitted, enlarged or reduced, and do not represent the actual product size; for those skilled in the art, it is understandable that some well-known structures and their descriptions in the drawings may be omitted. DETAILED DESCRIPTION

[0038] The technical solutions in the embodiments of the present application will be described clearly and completely in combination with the drawings in the embodiments of the present application.

[0039] Embodiment one:

[0040] AsFigure 1 The embodiment discloses an internal balance type pneumatic high-pressure sewage two-position three-way reversing ball valve structure.

[0041] The valve seat 2, the valve ball 3 and the valve ball support sleeve 4 are installed in the valve body 6, and the axial direction of the valve seat 2 and the valve body 6 is the left-right direction; the valve seat 2 is symmetrically arranged left and right, and the valve seat 2 is provided with three ports, including a valve seat left port and a valve seat right port respectively located at the left and right ends of the valve seat and a valve seat middle port located in the middle of the valve seat.

[0042] The valve body 6 is provided with an A port opened in the radial direction at the left position, and the A port is communicated with the valve seat middle port; the valve body is provided with a P port opened in the radial direction at the right position, and the P port is communicated with the valve seat right port.

[0043] The water return interface 1 is connected with the left end of the valve body 6, and the water return interface is a B port communicated with the valve seat left port.

[0044] The valve rod sealing sleeve 7 is coaxially connected with the right end of the valve body 6. In the embodiment, the valve rod sealing sleeve 7 is installed at the right end of the valve body 6 and is pressed by the valve rod sealing sleeve flange 8.

[0045] The valve rod sealing sleeve 7 is provided with the valve rod 5 in sliding sealing cooperation with the valve rod sealing sleeve 7 in the left-right direction, and the left end of the valve rod 5 is coaxially fixedly connected with a connecting rod 11, the connecting rod 11 extends through the valve seat right port and is connected with the valve ball 3.

[0046] In the embodiment, the diameter of the valve rod 5 is greater than the diameter of the connecting rod 11, and the valve rod 5 and the connecting rod 11 are an integral structure. The valve ball 3 is fixedly sleeved on the connecting rod 11.

[0047] In the embodiment, the valve rod 5 and the valve rod sealing sleeve 7 are sealed by lubricating oil, and the valve rod is provided with a lubricating groove C, and the lubricating groove C is filled with lubricating grease to prolong the service life of the valve rod sealing element.

[0048] The actuator is connected with the valve rod and is used for pushing the valve rod to move left or right.

[0049] In the embodiment, the actuator is a pneumatic cylinder 10. The piston rod of the pneumatic cylinder 10 is connected with the valve rod 5, and the cylinder barrel of the pneumatic cylinder is coaxially connected with the valve rod sealing sleeve through a mounting sleeve 9, which can be in the form of one of a thread, a flange or a buckle.

[0050] The mounting sleeve 9 is also provided with a collection hole D for collecting the leakage of the valve rod sealing element.

[0051] The cylinder barrel forms a left chamber on the left side of the piston, and the cylinder barrel is provided with a gas port b, and the gas port a is communicated with the left chamber; the cylinder barrel forms a right chamber on the right side of the piston, and the cylinder barrel is provided with a gas port a, and the gas port b is communicated with the right chamber; the gas port a and the gas port b are connected with a gas pressure system.

[0052] In other embodiments, the actuator may also be a hydraulic cylinder or an electric cylinder.

[0053] When this invention is in operation, high-pressure water enters through port P, forming a first working surface that contacts the high-pressure water at the connection end between valve ball 3 and connecting rod 11. The force generated by the high-pressure water acting on the first working surface is F1, and F1 is directed to the left. A second working surface that contacts the high-pressure water is formed at the connection end between valve stem 5 and connecting rod 11, and the force generated by the high-pressure water acting on the second working surface is F2, and F2 is directed to the right. The areas of the first working surface and the second working surface are similar or equal, thereby making F1 and F2 similar or equal.

[0054] Since F1 and F2 are in opposite directions, these two forces will cancel each other out. This means that the actuator only needs a small force to move the valve stem to the left or right, thereby switching the high-pressure water flow.

[0055] The present invention adopts the above-mentioned internal balance method, which eliminates the need for a feedback piston and an external balance tube, and its structure is simple and easier to process and install.

[0056] The specific working process of this embodiment is as follows:

[0057] Air enters through port a on the cylinder, the cylinder piston moves to the left, pushing valve rod 5 to the left, the left spherical surface of valve ball 3 collides with the left port of valve seat, and the left spherical surface of valve ball 3 forms a seal with the left port of valve seat. High-pressure water enters through port P, flows through the right port of valve seat and then flows out through port A. At this time, port P and port A are connected, and port B is cut off.

[0058] Air enters through port b on the cylinder, causing the cylinder piston to move to the right, pushing valve stem 5 to the right. The right side of valve ball 3 collides with the right port of valve seat, forming a seal. This seal is maintained by the cylinder. At this time, port P is closed, and ports A and B are connected. Liquid from port A flows through the left port of valve seat and then out through port B.

[0059] Example 2:

[0060] like Figure 2 As shown, the difference between this embodiment and Embodiment 1 is that in this embodiment, the valve stem 5 and the valve stem sealing sleeve 7 are sealed by packing. The valve stem sealing sleeve 7 and the valve body 6 are an integral structure.

[0061] The packing seal includes packing 12, packing compression sleeve 13, compression flange 14, and adjusting bolt 15. The packing 12 is installed in the hole on the right side of the valve stem sealing sleeve 7. The adjusting bolt 15 presses the compression flange 14, and the compression flange 14 pushes the packing compression sleeve 13, thereby pressing the packing 12 tightly to achieve the function of sealing the valve stem.

[0062] The two-position three-way reversing ball valve has simple structure, is convenient to process and install, has reliable sealing performance, has low requirement on water cleanliness, can be used for sewage reversing valve, has fast response speed and large flow.

[0063] The above examples are only used to illustrate but not to limit the technical solutions of the present application. Although the present application is described in detail with reference to the above examples, those skilled in the art should understand that the present application can still be modified or equivalently replaced without departing from the spirit and scope of the present application, and any modification or partial replacement should be covered in the scope of the claims of the present application.

[0064] If the terms "first", "second" and the like are used herein to describe components, those skilled in the art should understand that the use of "first", "second" is only for the convenience of describing the present application and simplifying the description, and the above terms have no special meaning unless otherwise stated.

[0065] In the description of the present application, it should be understood that the terms "center", "longitudinal", "transverse", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and do not indicate or imply that the device or element referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0066] In the description of the present application, it should be noted that unless otherwise explicitly specified and limited, the terms "mounting", "connection", "connection" should be understood broadly, for example, it can be fixed connection, or detachable connection, or integrally connected; can be mechanical connection, or electrical connection; can be directly connected, or indirectly connected through intermediate medium; can be the communication between two elements. For those skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

Claims

1. A structure for an internally balanced, pneumatically controlled, high-pressure sewage two-position three-way reversing ball valve, characterized in that; The valve seat, the valve ball, the valve ball support sleeve, the valve body, the valve rod sealing sleeve, the valve rod and the actuator are included. The valve seat, the valve ball and the valve ball support sleeve are installed in the valve body, and the axial direction of the valve seat and the valve body is the left-right direction. The valve body is provided with an A port at the left position, and the A port is communicated with the middle port of the valve seat. The valve body is provided with a P port at the right position, and the P port is communicated with the right port of the valve seat. The water return interface is connected with the left end of the valve body, and the water return interface is a B port communicated with the left port of the valve seat. The valve rod sealing sleeve is coaxially connected with the right end of the valve body, and the valve rod is arranged in the valve rod sealing sleeve and slidably sealed in the left-right direction. The actuator is connected with the valve rod and used for pushing the valve rod to move leftward or rightward. The high-pressure water enters the P port, and a first action surface contacted by the high-pressure water is formed at the connecting end of the valve ball and the connecting rod. When the actuator pushes the valve rod to move rightward, the valve rod drives the valve ball to move rightward and seal the right port of the valve seat, and at this time, the A port is communicated with the B port, and the P port is cut off. The valve seat is symmetrically arranged left and right. The A port and the P port of the valve body are both radially arranged.

2. The internal balance type pneumatic control high pressure sewage two-position three-way reversing ball valve structure according to claim 1, characterized in that: The actuator is a gas cylinder.

3. The structure of the inner balance type pneumatic control high pressure sewage two-position three-way reversing ball valve according to claim 2, characterized in that: The piston rod of the gas cylinder is connected with the valve rod, and the cylinder barrel of the gas cylinder is coaxially connected with the valve rod sealing sleeve. The cylinder barrel forms a left chamber at the left side of the piston, and the cylinder barrel is provided with a gas port b. The cylinder barrel forms a right chamber at the right side of the piston, and the cylinder barrel is provided with a gas port a. The gas port a and the gas port b are connected with a gas pressure system.

4. The internal balance type pneumatic control high pressure sewage two-position three-way reversing ball valve structure according to claim 2, characterized in that: The cylinder barrel of the gas cylinder is coaxially connected with the valve rod sealing sleeve through a mounting sleeve, and the mounting sleeve is further provided with a collecting hole D.

5. The structure of the inner balance type pneumatic control high pressure sewage two-position three-way reversing ball valve according to claim 1, characterized in that: The actuator is a hydraulic cylinder or an electric cylinder.

6. The structure of the inner balance type pneumatic control high pressure sewage two-position three-way reversing ball valve according to claim 1, characterized in that: The valve rod and the valve rod sealing sleeve are sealed by lubricating oil or packing.

7. The structure of the inner balance type pneumatic control high pressure sewage two-position three-way reversing ball valve according to any one of claims 1-6, characterized in that: The diameter of the valve rod is greater than that of the connecting rod, and the valve rod and the connecting rod are an integral structure.

8. The structure of the inner balance type pneumatic control high pressure sewage two-position three-way reversing ball valve according to any one of claims 1-6, characterized in that: The valve ball fixing sleeve is arranged on the connecting rod.

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