A pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure

Abstract

The present invention discloses a pneumatically controlled, high-pressure, balanced sewage, two-position, three-way reversing ball valve structure, comprising: a valve seat, a valve ball, and a valve ball centering sleeve installed within a valve body; the valve seat having three openings: a left opening and a right opening, located at the left and right ends of the valve seat, respectively, and a center opening located in the center of the valve seat; a port A located on the left side of the valve body, communicating with the center opening of the valve seat; a port B located on the right side of the valve body, communicating with the right opening of the valve seat; a high-pressure water wellhead connector connected to the left end of the valve body, the port of the high-pressure water wellhead connector being port P, forming a chamber C within the high-pressure water wellhead connector; a feedback piston sealing sleeve forming a closed chamber D at the right end of the feedback piston; chambers C and D being connected via a balancing pipe. The valve valve has reliable sealing performance, requires relatively low water cleanliness, and can be used in sewage reversing valves; it also features fast response speed and high flow rate.

Description

Technical Field

[0001] The invention relates to the technical field of reversing valves, and in particular to a pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure. Background Art

[0002] High-pressure oil is the primary power source for hydraulic systems in various engineering machinery applications. Leakage of high-pressure hydraulic oil is not environmentally friendly, and hydraulic oil also has a flash point. High-temperature, high-pressure atomized hydraulic oil is easily flammable, posing a safety hazard. High-flow hydraulic systems also incur significant costs for hydraulic oil.

[0003] In this situation, water-powered hydraulic systems have emerged. Water hydraulic systems are safer and more environmentally friendly than oil hydraulic systems. However, water hydraulic systems, powered by water, place high demands on water cleanliness and valve sealing performance. However, there is currently no reliable reversing valve for high-pressure water-powered mechanical equipment. Summary of the Invention

[0004] The purpose of the present invention is to provide a pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure.

[0005] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0006] A pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure comprises a valve seat, a valve ball, a valve ball centering sleeve, a valve body, a push rod sleeve, a push rod, a feedback piston, a feedback piston sealing sleeve and a pushing mechanism;

[0007] The valve seat, valve ball and valve ball centering sleeve are installed in the valve body, with the axial direction of the valve seat and valve body as the left and right direction; the valve seat is provided with three ports, including: the left port and the right port located at the left and right ends of the valve seat respectively, and the middle port located in the middle of the valve seat;

[0008] There is a port A on the left side of the valve body, which is connected to the middle port of the valve seat; there is a port B on the right side of the valve body, which is connected to the right port of the valve seat;

[0009] The high-pressure water wellhead connector is connected to the left end of the valve body. The port of the high-pressure water wellhead connector is port P, and a chamber C is formed inside the high-pressure water wellhead connector.

[0010] The push rod sleeve is coaxially connected to the right end of the valve body. A push rod is provided in the push rod sleeve and is in sliding and sealing cooperation with the push rod in the left and right directions. The left end of the push rod passes through the right opening of the valve seat and points to the valve ball. The pushing mechanism is used to push the push rod to move left or right.

[0011] The feedback piston sealing sleeve is coaxially connected to the right end of the push rod sleeve. A feedback piston is installed in the feedback piston sealing sleeve and is in sliding and sealing cooperation with the feedback piston in the left and right directions. The feedback piston sealing sleeve forms a closed chamber D at the right end of the feedback piston.

[0012] Chamber C is connected to chamber D through a balance pipe;

[0013] When the push mechanism pushes the push rod to the left, the push rod pushes the valve ball to the left and seals the left port of the valve seat. At this time, port P is closed, and ports A and B are connected;

[0014] When the pushing mechanism pushes the push rod to the right, the push rod leaves the valve ball, and the valve ball moves to the right by relying on the high-pressure water flow entering from the P port and seals the right port of the valve seat. At this time, the P port is connected to the A port, and the B port is closed.

[0015] Furthermore, the push rod sleeve is composed of a left cylinder cover, a cylinder, and a right cylinder cover, which are coaxially fixedly connected in sequence on the left and right sides. The push rod and the left cylinder cover slide and seal in the left and right directions. A push rod piston is provided in the cylinder that slides and seals with it in the left and right directions. The right end of the push rod is coaxially connected to the push rod piston, and the push rod piston is coaxially connected to the feedback piston.

[0016] Furthermore, the cylinder forms a closed chamber E on the left side of the push rod piston, and an air inlet a is provided on the cylinder or the left cover of the cylinder, and the air inlet a is communicated with the chamber E;

[0017] The cylinder forms a closed chamber F on the right side of the push rod piston, and an air inlet b is provided on the cylinder or the right cover of the cylinder, and the air inlet b is connected to the chamber F;

[0018] Thereby forming a direct-push pushing mechanism.

[0019] Furthermore, the feedback piston sealing sleeve is installed in the right cover of the cylinder barrel, and the right end of the feedback piston sealing sleeve and the right cover of the cylinder barrel are connected by pins passing through the upper and lower parts.

[0020] Furthermore, the right end of the feedback piston sealing sleeve is closed to form a closed chamber D.

[0021] Furthermore, the push rod sleeve is provided with a long slot extending in the left and right directions, through which a radially extending shift rod passes, one end of the shift rod is connected to the push rod, and the other end of the shift rod extends to the outside of the push rod sleeve;

[0022] It also includes a cylinder arranged in the left and right directions, wherein the piston end of the cylinder is connected to the other end of the shift rod;

[0023] Thereby forming a side-pushing type pushing mechanism.

[0024] Furthermore, the high-pressure water wellhead joint is connected to the valve body by bolts, and the push rod sleeve is connected to the valve body by bolts; the right end of the push rod is connected to the push rod piston by a pin, and the push rod piston is coaxially connected to the feedback piston by a pin.

[0025] Furthermore, the diameter of the push rod is smaller than the right port of the valve seat, so that the B port is connected to the right port of the valve seat.

[0026] Furthermore, the cross-sectional area of ​​the feedback piston is the same as the cross-sectional area of ​​the valve seat.

[0027] Furthermore, the valve seat is arranged bilaterally symmetrically.

[0028] The beneficial effects of the present invention are:

[0029] 1. The two-position three-way reversing ball valve of the present invention has reliable sealing performance and low requirements for water cleanliness, and can be used as a sewage reversing valve; it also has the characteristics of fast response speed and large flow rate.

[0030] 2. The valve ball and valve seat of the present invention have simple structures, reliable sealing, and are easy to process high-hardness materials.

[0031] 3. The valve ball and valve seat can be quickly taken out by removing the bolts. The valve seat is symmetrical on both sides and can be turned over for continued use.

[0032] 4. The cross-sectional area of ​​the feedback piston in this invention is the same as that of the valve seat. The forces generated by the high-pressure water are identical but in opposite directions. The compressed air acts on the piston to generate a smaller force, switching the direction of the high-flow, high-pressure water.

[0033] 5. The present invention adopts a pin quick-install structure. When the push rod is worn or the sealing ring on the push rod piston or feedback piston fails, the pin can be pulled out and the above components can be taken out for quick replacement. BRIEF DESCRIPTION OF THE DRAWINGS

[0034] Figure 1 It is a structural diagram of embodiment 1 of the present invention;

[0035] Figure 2 It is a structural diagram of embodiment 2 of the present invention.

[0036] The accompanying drawings are for illustrative purposes only and are not to be construed as limitations on this patent. To better illustrate this embodiment, some components of the accompanying drawings may be omitted, enlarged, or reduced in size, and do not represent the actual dimensions of the product. For those skilled in the art, it is understandable that some well-known structures and their descriptions may be omitted from the accompanying drawings. DETAILED DESCRIPTION

[0037] The technical solutions in the embodiments of the present invention will be described clearly and completely below with reference to the accompanying drawings in the embodiments of the present invention.

[0038] Example 1:

[0039] like Figure 1As shown, this embodiment discloses a pneumatically controlled, high-pressure, balanced sewage, two-position, three-way reversing ball valve structure, comprising a valve seat 3, a valve ball 4, a valve ball centering sleeve 5, a valve body 6, a push rod sleeve, a push rod 7, a feedback piston 12, a feedback piston sealing sleeve 13, and a push mechanism. The push mechanism in this embodiment is a direct-push push mechanism.

[0040] The valve seat 3, valve ball 4 and valve ball straightening sleeve 5 are installed in the valve body 6 in sequence, with the axial direction of the valve seat 3 and valve body 6 as the left and right direction; the valve seat 3 is provided with three openings, including: a left opening and a right opening of the valve seat located at the left and right ends of the valve seat respectively, and a middle opening of the valve seat located in the middle of the valve seat.

[0041] The valve body 6 has a port A on the left side, which communicates with the center port of the valve seat. The valve body 6 has a port B on the right side, which communicates with the right port of the valve seat. In this embodiment, the diameter of the push rod 7 is smaller than the right port of the valve seat, so that port B communicates with the right port of the valve seat.

[0042] The high-pressure water wellhead connector 1 is connected to the left end of the valve body 6 and fixed by bolts 2. The port of the high-pressure water wellhead connector 1 is port P, and a chamber C is formed inside the high-pressure water wellhead connector 1.

[0043] The push rod sleeve is coaxially connected to the right end 6 of the valve body and fixed by bolts. A push rod 7 is provided in the push rod sleeve, which slides and seals with it in the left and right directions. The left end of the push rod 7 passes through the right opening of the valve seat and points to the valve ball 4; the pushing mechanism is used to push the push rod 7 to move left or right.

[0044] In this embodiment, the valve ball and valve seat have a simple structure, reliable sealing, and are easy to process high-hardness materials. In addition, the valve ball and valve seat can be quickly removed by removing the bolts. The valve seat is symmetrical on both sides and can be turned over for continued use.

[0045] The feedback piston sealing sleeve 13 is coaxially connected to the right end of the push rod sleeve. The feedback piston sealing sleeve 13 is provided with a feedback piston 12 that slides and seals with it in the left and right directions. The feedback piston sealing sleeve 13 forms a closed chamber D at the right end of the feedback piston 12.

[0046] The aforementioned chambers C and D are connected via a balancing pipe 15. At the same time, the cross-sectional area of ​​the feedback piston 12 is the same as that of the valve seat 3. The forces generated by the high-pressure water under pressure are the same but in opposite directions. The compressed air acts on the piston to generate a smaller force to switch the direction of the high-flow high-pressure water.

[0047] When the pushing mechanism pushes the push rod 7 to move left, the push rod 7 pushes the valve ball 4 to move left and seals the left port of the valve seat. At this time, the P port is closed, and the A port is connected to the B port; when the pushing mechanism pushes the push rod 7 to move right, the push rod 7 leaves the valve ball 7, and the valve ball 7 moves to the right by relying on the high-pressure water flow entering the P port and seals the right port of the valve seat. At this time, the P port is connected to the A port, and the B port is closed.

[0048] In this embodiment, the push rod sleeve is composed of a left cylinder cover 8, a cylinder 9, and a right cylinder cover 11, which are coaxially fixedly connected in sequence on the left and right sides. The push rod 7 and the left cylinder cover 8 slide and seal in the left and right directions. A push rod piston 10 is provided in the cylinder 9, which slides and seals with it in the left and right directions. The right end 7 of the push rod is coaxially connected to the push rod piston 10 through a pin, and the push rod piston 10 and the feedback piston 12 are coaxially connected through a pin.

[0049] In this embodiment, the cylinder 9 forms a closed chamber E on the left side of the push rod piston 10. An air inlet a is provided on the cylinder, communicating with the chamber E. A closed chamber F is formed on the right side of the push rod piston 10. An air inlet b is provided on the right cylinder cover 11, communicating with the chamber F. This forms a direct-push mechanism.

[0050] In this embodiment, the feedback piston sealing sleeve 13 is installed in the cylinder right cover 11, and the right end of the feedback piston sealing sleeve is sealed to form a closed chamber D. The feedback piston sealing sleeve 13 and the right end of the cylinder right cover 11 are connected by a pin 14 passing through the upper and lower parts.

[0051] This embodiment adopts a pin quick-install structure. When the push rod 7 is worn or the sealing rings on the push rod piston 10 and the feedback piston 12 fail, the pin is pulled out and the above components are taken out for quick replacement.

[0052] The working principle of this embodiment is as follows:

[0053] Compressed air is injected from the air inlet b of the right cover 11 of the cylinder barrel, the push rod piston 10 moves left, and the push rod 7 pushes the valve ball 4 to the left end of the valve seat 3; the high-pressure water at port P passes through the balance pipe 15 and is introduced into the chamber D in the feedback piston sealing sleeve 13. This high-pressure water acts on the feedback piston 12 to generate a leftward thrust. The two forces work together to seal the valve ball 4 to the left end of the valve seat 3. Figure 1 As shown, at this time, port P is closed and port A is connected to port B.

[0054] Compressed air is injected through the air inlet port a of the right cylinder cover 9. Push rod piston 10 pushes feedback piston 12 rightward, causing push rod 7 to separate from valve ball 4. The high-pressure water flow from port P seals the valve ball 4 against the right opening of valve seat 3. The combined force of the high-pressure water at port P on valve ball 3 and the rightward force of the cylinder is greater than the leftward thrust of feedback piston 12, sealing the valve ball 4 against the right opening of valve seat 3. At this point, port P communicates with port A, and port B is closed.

[0055] The two-position three-way reversing ball valve of the present invention has reliable sealing performance, has low requirements on water cleanliness, and can be used as a sewage reversing valve; and also has the characteristics of fast response speed and large flow.

[0056] Example 2:

[0057] like Figure 2As shown, the difference between this embodiment and the first embodiment is that the pushing mechanism in this embodiment is a side-pushing pushing mechanism.

[0058] Specifically, a long slot extending in the left-right direction is provided on the push rod sleeve 16 , through which a radially extending shift rod 17 passes. One end of the shift rod 17 is connected to the push rod 7 , and the other end of the shift rod 17 extends to the outside of the push rod sleeve 16 .

[0059] It also includes a cylinder 18 arranged in the left and right directions, and the piston end of the cylinder 18 is connected to the other end of the shift rod 17, thereby forming a side-push pushing mechanism.

[0060] The advantages of the side-push mechanism used in this embodiment are that the position of the push rod can be observed, a standard cylinder is used, and it is easy to replace.

[0061] The above embodiments are only used to illustrate rather than limit the technical solutions of the present invention. Although the present invention has been described in detail with reference to the above embodiments, those skilled in the art should understand that the present invention can still be modified or replaced by equivalents. Any modification or partial replacement that does not depart from the spirit and scope of the present invention should be included in the scope of the claims of the present invention.

[0062] If words such as "first" and "second" are used in this document to limit components, those skilled in the art should know that the use of "first" and "second" is only for the convenience of describing the present invention and simplifying the description. Unless otherwise stated, the above words have no special meaning.

[0063] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like to indicate orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore should not be understood as limiting the present invention.

[0064] In the description of the present invention, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood in a broad sense. For example, they may refer to fixed, detachable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediate medium; and internal communication between two components. Those skilled in the art will understand the specific meanings of the above terms in the present invention based on the specific circumstances.

Claims

1. A pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure, characterized by: It includes a valve seat, a valve ball, a valve ball centering sleeve, a valve body, a push rod sleeve, a push rod, a feedback piston, a feedback piston sealing sleeve and a pushing mechanism; The valve seat, valve ball and valve ball centering sleeve are installed in the valve body, with the axial direction of the valve seat and valve body as the left and right direction; the valve seat is provided with three ports, including: the left port and the right port located at the left and right ends of the valve seat respectively, and the middle port located in the middle of the valve seat; There is a port A on the left side of the valve body, which is connected to the middle port of the valve seat; there is a port B on the right side of the valve body, which is connected to the right port of the valve seat; The high-pressure water wellhead connector is connected to the left end of the valve body. The port of the high-pressure water wellhead connector is port P, and a chamber C is formed inside the high-pressure water wellhead connector. The push rod sleeve is coaxially connected to the right end of the valve body. A push rod is provided in the push rod sleeve and is in sliding and sealing cooperation with the push rod in the left and right directions. The left end of the push rod passes through the right opening of the valve seat and points to the valve ball. The pushing mechanism is used to push the push rod to move left or right. The diameter of the push rod is smaller than the right opening of the valve seat, so that the B port is connected with the right opening of the valve seat; The feedback piston sealing sleeve is coaxially connected to the right end of the push rod sleeve. A feedback piston is installed in the feedback piston sealing sleeve and is in sliding and sealing cooperation with the feedback piston in the left and right directions. The feedback piston sealing sleeve forms a closed chamber D at the right end of the feedback piston. The cross-sectional area of ​​the feedback piston is the same as the cross-sectional area of ​​the valve seat; Chamber C is connected to chamber D through a balance pipe; When the push mechanism pushes the push rod to the left, the push rod pushes the valve ball to the left and seals the left port of the valve seat. At this time, port P is closed, and ports A and B are connected; When the pushing mechanism pushes the push rod to the right, the push rod leaves the valve ball, and the valve ball moves to the right by relying on the high-pressure water flow entering from the P port and seals the right port of the valve seat. At this time, the P port is connected to the A port, and the B port is closed.

2. The pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure according to claim 1 is characterized by: The push rod sleeve is composed of a left cylinder cover, a cylinder, and a right cylinder cover which are coaxially fixed in sequence on the left and right sides. The push rod and the left cylinder cover slide and seal in the left and right directions. A push rod piston is provided in the cylinder which slides and seals with it in the left and right directions. The right end of the push rod is coaxially connected to the push rod piston, and the push rod piston is coaxially connected to the feedback piston.

3. The pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure according to claim 2 is characterized by: The cylinder barrel forms a closed chamber E on the left side of the push rod piston, and the cylinder barrel or the left cover of the cylinder barrel is provided with an air inlet a, which is connected to the chamber E; The cylinder forms a closed chamber F on the right side of the push rod piston, and an air inlet b is provided on the cylinder or the right cover of the cylinder, and the air inlet b is connected to the chamber F; Thereby forming a direct-push type pushing mechanism.

4. The pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure according to claim 2 is characterized by: The feedback piston sealing sleeve is installed in the right cover of the cylinder barrel, and the right end of the feedback piston sealing sleeve and the right cover of the cylinder barrel are connected by pins passing through the upper and lower parts.

5. The pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure according to claim 4 is characterized by: The right end of the feedback piston sealing sleeve is closed to form a closed chamber D.

6. The pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure according to claim 1 is characterized by: The push rod sleeve is provided with a long slot extending in the left and right directions, through which a radially extending shift rod passes, one end of the shift rod is connected to the push rod, and the other end of the shift rod extends to the outside of the push rod sleeve; It also includes a cylinder arranged in the left and right directions, wherein the piston end of the cylinder is connected to the other end of the shift rod; Thereby forming a side-push type pushing mechanism.

7. The pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure according to claim 1 is characterized by: The high-pressure water wellhead joint is connected to the valve body through bolts, and the push rod sleeve is connected to the valve body through bolts; the right end of the push rod is connected to the push rod piston through a pin, and the push rod piston and the feedback piston are coaxially connected through a pin.

8. The pneumatically controlled high-pressure balanced sewage two-position three-way reversing ball valve structure according to claim 1 is characterized by: The valve seat is arranged symmetrically on both sides.

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