Manual valve convenient to open and close

Abstract

The manual valve convenient to open and close comprises a valve body, an operating component, a valve element, a bypass pipe and a bypass valve, and a high-pressure cavity, a valve cavity and a low-pressure cavity which are sequentially communicated are formed in the valve body; by means of the manual action of a user on the operating component, the valve element is installed in the valve cavity between the closing position and the opening position in a switchable mode, the by-pass pipe is installed between the high-pressure cavity and the low-pressure cavity, the by-pass valve is installed on the by-pass pipe, and the high-pressure cavity and the low-pressure cavity can be communicated in a two-way mode by means of opening of the by-pass valve. The embodiment of the invention has the beneficial effects that the bypass pipe and the bypass valve are erected between the high-pressure cavity and the low-pressure cavity to eliminate or at least reduce the pressure difference and avoid or at least reduce the resistance of the pressure difference to the opening and closing of the manual valve, so that the manual opening and closing can be easily realized.

Description

Technical Field

[0001] The invention relates to the technical field of hydraulic components, and in particular to a manual valve which is easy to open and close. Background Art

[0002] Manual valves are installed in various pipelines to control whether the fluid medium in the pipeline flows and / or the flow rate.

[0003] When the manual valve is fully opened, a high-pressure chamber is formed on the side of the manual valve facing the direction in which the medium comes, and correspondingly, a low-pressure chamber is formed on the side of the manual valve facing the direction in which the medium leaves. When the manual valve is fully opened, the valve core is completely immersed in the medium, and considering the miniaturization of the volume, due to the effect of the medium pressure, the valve core is tightly attached to the inner wall of the valve body to completely open the valve chamber, and the surface pressure of the valve core used to seal the valve chamber is much greater than the pressure of the valve core attached to the inner wall of the valve body, forming a large pressure difference. At this time, if you want to move the valve core from the fully open position to a smaller opening position (or closed position), you need to overcome the pressure difference, and manual operation is laborious, especially when the medium pressure is high and the valve core is closely attached to the inner wall of the valve body for a long time, which may cause adhesion, further increasing the difficulty of moving from the fully open state to the smaller opening state (a necessary process for the closed state), and sometimes it is even impossible to operate manually.

[0004] When the manual valve is in a fully closed state, the above-mentioned pressure difference will also be formed, which will have a counter-effect on the opening of the manual valve, and sometimes it will be impossible to operate manually.

[0005] In summary, in order to solve the difficulty or even impossibility of opening (from fully closed to partially or fully open) and closing (from fully open to partially or fully closed) of a manual valve, the present invention provides a manual valve that is easy to open and close to overcome or at least alleviate the occurrence of the above-mentioned problems. Summary of the invention

[0006] The object of the present invention is to provide a manual valve that is easy to open and close. By arranging a bypass pipe and a bypass valve between a high-pressure chamber and a low-pressure chamber, the pressure difference can be eliminated (the bypass valve is opened for a long enough time so that the medium can fully flow from the high-pressure chamber into the low-pressure chamber, and the medium pressures in the two chambers are equal) or at least reduced (the bypass valve is opened for a short time, the medium does not fully flow from the high-pressure chamber into the low-pressure chamber, and the pressure difference is only reduced to a certain extent), avoiding or at least reducing the resistance to the opening and closing of the manual valve caused by the pressure difference, so that the manual valve can be opened and closed easily.

[0007] To achieve the above object, the present invention is implemented by adopting the following technical solutions:

[0008] A manual valve that is easy to open and close, comprising:

[0009] The valve body has a valve cavity, a high-pressure cavity connected to the medium inlet, and a low-pressure cavity connected to the medium outlet formed therein, wherein the high-pressure cavity, the valve cavity, and the low-pressure cavity are connected in sequence;

[0010] An operating member, comprising an action member located inside the valve body and an operating member located outside the valve body;

[0011] a valve core, which is mounted in the valve chamber switchably between a closed position and an open position by means of a manual action of a user on the operating member;

[0012] a bypass pipe having a first end and a second end, wherein the first end and the second end are respectively connected to the high-pressure chamber and the low-pressure chamber, and a flow area of ​​the bypass pipe is much smaller than a flow area of ​​the valve chamber; and

[0013] The bypass valve is a normally closed valve and is installed on the bypass pipe. By opening the bypass valve, the high-pressure chamber and the low-pressure chamber can be bidirectionally connected.

[0014] Further, the distance from the bypass valve to the first end is less than the distance from the bypass valve to the second end.

[0015] Furthermore, a control unit is included, and the control unit is configured to open the bypass valve based on detecting an opening / closing operation of the operating member by a user.

[0016] Furthermore, the actuating member is fixedly connected to the valve core, and the actuating member is rotatably mounted on the valve body.

[0017] Further, the control unit also includes a rotation direction detection unit installed between the operating member and the valve body, for detecting a rotation direction of the operating member relative to the valve body, and the control unit is configured to open the bypass valve based on the rotation direction.

[0018] Furthermore, the control unit further includes a timer for detecting the duration of the fixed rotation direction. The control unit is further configured as follows:

[0019] If the direction of rotation remains unchanged during the time period T, the bypass valve is opened.

[0020] Furthermore, the operating member further comprises:

[0021] There are at least three positioning posts fixed to the valve body, and the at least three positioning posts are evenly arranged around the actuating member;

[0022] A positioning plate, supported by the positioning column and located outside the valve cavity, an operating hole is opened in the middle of the positioning plate, and at least a part of the operating member is opened with an external thread matched with the thread of the operating hole; and

[0023] The first guide sleeve is fixed to the valve body, and the end of the actuating member close to the valve cavity is sealed and matched with a through hole formed in the first guide sleeve.

[0024] Furthermore, the high-pressure chamber includes an inlet section and an ascending section, and the low-pressure chamber includes an outlet section and a descending section, and the inlet section is in the same direction as the outlet section;

[0025] The rising section gradually rises from the inner end of the inlet section along the medium flow direction to the side of the valve cavity facing the operating member;

[0026] The descending section gradually descends from the inner end of the outlet section to a side of the valve cavity away from the operating member along the opposite direction of the medium flow.

[0027] Furthermore, the actuating member is in abutment with the valve core, and the valve core is provided with a fan-shaped protrusion which can drive the valve core to rotate as the medium flows.

[0028] Further, the end of the valve core abutting against the actuating member forms a buffer cavity to be clearance-matched with the actuating member, and an elastic member is arranged between the actuating member and the buffer cavity;

[0029] A second guide sleeve is fixed in the valve cavity, and the valve core is seal-fitted in the second guide sleeve.

[0030] The beneficial effects of the present invention are as follows:

[0031] By setting up a bypass pipe and bypass valve between the high-pressure chamber and the low-pressure chamber, the pressure difference can be eliminated (the bypass valve is opened for a long enough time so that the medium can fully flow from the high-pressure chamber into the low-pressure chamber, and the medium pressures in the two chambers are equal) or at least reduced (the bypass valve is opened for a short time, the medium does not fully flow from the high-pressure chamber into the low-pressure chamber, and the pressure difference is only reduced to a certain extent), avoiding or at least reducing the resistance of the pressure difference to the opening and closing of the manual valve, so that it can be opened and closed manually easily;

[0032] The flow area of ​​the bypass pipe is much smaller than the flow area of ​​the valve cavity. After the bypass valve is opened, the flow rate is small and the water hammer effect is small, thus avoiding the influence of the water hammer effect on the system pipeline. At the same time, there is no need to consider the elimination of the weaker water hammer effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0033] Figure 1 It is a three-dimensional structural schematic diagram of a first viewing angle of an embodiment of a manual valve that is easy to open and close;

[0034] Figure 2 for Figure 1 A schematic diagram of a three-dimensional structure from a second viewing angle;

[0035] Figure 3 for Figure 2 Sectional view of the middle section AA;

[0036] Figure 4 The main view of the valve body (looking down from the opening that matches the valve cover);

[0037] Figure 5 for Figure 4 Sectional view of the middle section BB;

[0038] Figure 6 It is a schematic diagram of the three-dimensional structure of a valve core embodiment from a first viewing angle;

[0039] Figure 7 A control block diagram of an embodiment of automatic opening and closing of a bypass valve.

[0040] Description of reference numerals:

[0041] 1. Valve body; 11. Medium inlet; 12. High-pressure chamber; 121. Inlet section; 122. Rising section; 13. Valve chamber; 14. Low-pressure chamber; 141. Descending section; 142. Outlet section; 15. Medium outlet; 16. Valve cover;

[0042] 2. operating member; 21. operating member; 22. action member; 23. positioning column; 24. positioning plate; 25. first guide sleeve;

[0043] 3. valve core; 31. buffer chamber; 32. protrusion;

[0044] 4. bypass pipe; 41. first end; 42. second end;

[0045] 5. Bypass valve;

[0046] 6. Elastic parts;

[0047] 7. Second guide sleeve;

[0048] 8. Control unit; 81. Rotation direction detection unit; 82. Timer; 83. First pressure sensor; 84. Second pressure sensor. DETAILED DESCRIPTION

[0049] In order to make the above-mentioned objects, features and advantages of the present invention more obvious and easy to understand, the specific embodiments of the present invention are described in detail below in conjunction with the accompanying drawings. In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without violating the connotation of the present invention, so the present invention is not limited by the specific implementation disclosed below.

[0050] In the description of the present invention, it is necessary to understand that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating the orientation or position relationship are based on the orientation or position relationship shown in the 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 cannot be understood as a limitation on the present invention.

[0051] Manual valves are usually installed on pipelines that transport fluid media (such as water, natural gas, etc.). By adjusting the opening of the manual valve, it is possible to control whether the medium is transported and the flow rate of the medium being transported. Figure 1 , which includes a valve body 1, an operating member 2, a valve core 3, a bypass pipe 4 and a bypass valve 5.

[0052] See also Figure 3 and Figure 5 A valve chamber 13, a high-pressure chamber connected to the medium inlet 11, and a low-pressure chamber 14 connected to the medium outlet 15 are formed inside the valve body 1. The high-pressure chamber, the valve chamber 13, and the low-pressure chamber 14 are connected in sequence, so that when the valve core 3 is opened (including partially opened), the medium flows in sequence along the following path: medium inlet 11→high-pressure chamber→valve chamber 13→low-pressure chamber 14→medium outlet 15.

[0053] Continue to see Figure 1 and Figure 3 The operating member 2 includes an action member 22 located inside the valve body 1 and an operating member 21 located outside the valve body 1. With the help of the user's manual action on the operating member 21, the valve core 3 is switchably installed in the valve cavity 13 between a closed position and an open position. It should be noted that in the closed position, the valve core 3 and the valve cavity 13 are completely sealed, and the flow of the medium is blocked; in the open position, the valve core 3 withdraws from the valve cavity 13, and the valve cavity 13 is opened to the maximum extent; of course, the valve core 3 can also be adjusted to any position between the closed position and the open position, so as to adjust the flow area by adjusting the opening of the manual valve.

[0054] Continue to see Figure 1 and Figure 3 The bypass pipe 4 has a first end 41 and a second end 42, which are respectively connected to the high-pressure chamber and the low-pressure chamber 14. The flow area of ​​the bypass pipe 4 is much smaller than the flow area of ​​the valve chamber 13. The bypass valve 5 is a normally closed valve and is installed on the bypass pipe 4. By opening the bypass valve 5, the high-pressure chamber and the low-pressure chamber 14 can be bidirectionally conducted.

[0055] By arranging a bypass pipe 4 and a bypass valve 5 between the high-pressure chamber and the low-pressure chamber 14, the pressure difference can be eliminated (the bypass valve 5 is opened for a long enough time so that the medium can fully flow from the high-pressure chamber into the low-pressure chamber 14, and the medium pressures in the two are equal) or at least reduced (the bypass valve 5 is opened for a short time, the medium does not fully flow from the high-pressure chamber into the low-pressure chamber 14, and the pressure difference is only reduced to a certain extent), thereby avoiding or at least reducing the resistance to the opening and closing of the manual valve caused by the pressure difference, so that the manual opening and closing can be easily performed; the flow area of ​​the bypass pipe 4 is much smaller than the flow area of ​​the valve chamber 13, and the flow rate is small after the bypass valve 5 is opened, and the water hammer effect generated is small, thereby avoiding the influence of the water hammer effect on the system pipeline, and at the same time, there is no need to consider the elimination of the weaker water hammer effect.

[0056] It should also be noted that the distance from the bypass valve 5 to the first end 41 is less than the distance from the bypass valve 5 to the second end 42. With this arrangement, after the bypass valve 5 is opened, the medium can flow from the high pressure chamber to the low pressure chamber 14 more quickly, thereby improving the response speed of the pressure difference reduction.

[0057] The bypass valve 5 can be opened and closed manually, such as the manual valve structure mentioned above.

[0058] The bypass valve 5 may also be opened automatically. In this case, the embodiment of the present invention may further include a control unit 8, which is configured to: open the bypass valve 5 based on detecting the opening / closing operation of the operating member 2 by the user;

[0059] The bypass valve 5 may also be closed automatically. In this case, the embodiment of the present invention may further include a first pressure sensor 83 installed in the high-pressure chamber, a second pressure sensor 84 installed in the low-pressure chamber 14, and the control unit 8 described above. The control unit 8 is configured in any of the following two ways:

[0060] The bypass valve 5 automatically closes after being opened for a preset time;

[0061] The automatic closing is based on the pressure difference detected by the first pressure sensor 83 and the second pressure sensor 84 (the pressure difference can be 0 or a fixed value). Figure 7 shown.

[0062] Continue to see Figure 3 One installation method between the action member 22 and the valve core 3 is: the action member 22 is fixedly connected to the valve core 3, and the action member 22 is rotatably installed on the valve body 1 (valve chamber 13). With the help of the user's action operating member 21, the action member 22 is driven to rotate, and the action member 22 drives the valve core 3 to move, thereby opening, closing or adjusting the flow area of ​​the valve chamber 13.

[0063] Regarding the operating member 21, it can be a hand wheel (such as Figure 1 , Figure 2 and Figure 3As shown), it can also be a long handle using a lever effect. Of course, those skilled in the art will know that it can also be other labor-saving structures, which will not be listed one by one for the sake of simplicity of description.

[0064] As can be seen from the background technology, a pressure difference will be generated when the valve core 3 is in the two states of fully closed and fully open (the valve core 3 is close to the inner wall of the valve body 1), and the pressure difference will disappear when the valve core 3 is in the partially open state (to be precise, it should be basically disappeared, and the pressure difference is extremely small). Based on this consideration, the bypass valve 5 only needs to be opened in the two states of fully closed→partially open and fully open→partially open. Of course, the opening here can still adopt the above-mentioned manual and automatic (the opening time is a preset time, or is controlled based on the size of the pressure difference) methods.

[0065] In addition, the control unit 8 also includes a rotation direction detection unit 81, see Figure 7 , installed between the operating member 2 and the valve body 1, for detecting the rotation direction of the operating member 2 relative to the valve body 1, and the control unit 8 is configured to open the bypass valve 5 based on the rotation direction. The control unit 8 also includes a timer 82, for detecting the duration of the fixed rotation direction, and the control unit 8 is further configured to: if the rotation direction remains unchanged for a duration T, open the bypass valve 5.

[0066] Continue to see Figure 1 and Figure 3 The operating member 2 further includes: a positioning column 23, a positioning disk 24 and a first guide sleeve 25. The positioning column 23 is fixed to the valve body 1. There are at least three positioning columns 23, and at least three positioning columns 23 are evenly arranged around the actuator 22. The positioning disk is supported by the positioning column 23 and is located outside the valve cavity 13. An operating hole is provided in the middle of the positioning disk 24. At least part of the actuator 22 is provided with an external thread that is threadedly matched with the operating hole. The first guide sleeve 25 is fixed to the valve body 1. The end of the actuator 22 close to the valve cavity 13 is sealed and matched with the through hole formed in the first guide sleeve 25. The rotation of the actuator 22 drives the valve core 3 to move toward / away from the valve cavity 13 through threaded matching, thereby opening and closing. The first guide sleeve 25 is provided to prevent the active member 22 from directly rubbing against the valve body 1 and affecting the sealing performance. In particular, the hardness of the first guide sleeve 25 can be set to be smaller than the hardness of the active member 22. In this way, the extrusion and friction between the active member 22 and the first guide sleeve 25 will only cause wear of the first guide sleeve 25, and will not affect the wear of the active member 22. That is, the first guide sleeve 25 is replaced as a wearing part to prevent the active member 22 and the valve body 1 from being damaged due to wear.

[0067] See also Figure 1 and Figure 4 , Figure 6 One structure of the hollow chamber of the valve body 1 is as follows:

[0068] The high-pressure chamber includes an inlet end 121 and an ascending section 122, and the low-pressure chamber 14 includes an outlet section 142 and a descending section 141. The inlet end 121 and the outlet section 142 are in the same direction, which is convenient for docking with pipelines in the same direction from the middle.

[0069] The rising section 122 gradually rises from the inner end of the inlet end 121 along the medium flow direction to the side of the valve chamber 13 facing the operating member 21. Under this structure, when the valve core 3 is fully closed, the high-pressure chamber generates a stable pressure on the valve core 3. Under the action of this pressure, the valve core 3 can be stably closed and the valve core 3 can be stably kept closed.

[0070] The descending section 141 gradually descends from the inner end of the outlet section 142 to the side of the valve cavity 13 away from the operating member 21 along the opposite direction of the medium flow.

[0071] In addition, the abutment between the actuator 22 and the valve core 3 is adopted, and a rigid connection is not adopted. Figure 1 and Figure 3 The valve core 3 is provided with a fan-shaped protrusion 31 which can drive the valve core 3 to rotate (in the direction T shown in the figure) as the medium flows. Figure 3 and Figure 6 The fan-shaped protrusion 31 can further reduce the "water hammer effect", ensure the stable flow of the medium, and avoid the impact on the valve core 3 and the valve cavity 13.

[0072] Continue to see Figure 3 and Figure 6 The end of the valve core 3 abutting against the action member 22 forms a buffer cavity 31 to fit with the action member 22 in a clearance, and an elastic member 6 is arranged between the action member 22 and the buffer cavity 31; a second guide sleeve 7 is fixed in the valve cavity 13, and the valve core 3 is sealed in the second guide sleeve 7. The "water hammer effect" can be further reduced, the stable flow of the medium is ensured, and the impact on the valve core 3 and the valve cavity 13 is avoided. The second guide sleeve 7 is arranged the same as the first guide sleeve 25, and it is replaced as a vulnerable part.

[0073] Continue to see Figure 3 and Figure 5 The valve body 1 is roughly T-shaped, and the high-pressure chamber 12 and the low-pressure chamber 14 each constitute an end that penetrates the outside, and the third end is sealed by the valve cover 16.

[0074] The basic principles and main features of the present invention and the advantages of the present invention are shown and described above. For those skilled in the art, it is obvious that the present invention is not limited to the details of the above exemplary embodiments, and the present invention can be implemented in other specific forms without departing from the spirit or basic features of the present invention; therefore, no matter from which point of view, the embodiments should be regarded as exemplary and non-restrictive. The scope of the present invention is limited by the attached claims rather than the above description. Therefore, it is intended to include all changes within the meaning and scope of the equivalent elements of the claims in the present invention, and any figure marks in the claims should not be regarded as limiting the claims involved.

[0075] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A manual valve that is easy to open and close, characterized in that: include: The valve body has a valve cavity, a high-pressure cavity connected to the medium inlet, and a low-pressure cavity connected to the medium outlet formed therein, wherein the high-pressure cavity, the valve cavity, and the low-pressure cavity are connected in sequence; An operating member comprises an action member located inside the valve body and an operating member located outside the valve body; a valve core, which is mounted in the valve chamber switchably between a closed position and an open position by means of a manual action of a user on the operating member; A bypass pipe having a first end and a second end, wherein the first end and the second end are respectively connected to the high-pressure chamber and the low-pressure chamber, and a flow area of ​​the bypass pipe is much smaller than a flow area of ​​the valve chamber; as well as The bypass valve is a normally closed valve and is installed on the bypass pipe. By opening the bypass valve, the high-pressure chamber and the low-pressure chamber can be bidirectionally connected.

2. A manual valve that is easy to open and close according to claim 1, characterized in that: The distance from the bypass valve to the first end is less than the distance from the bypass valve to the second end.

3. A manual valve that is easy to open and close according to claim 1, characterized in that: A control unit is further included, the control unit being configured to open the bypass valve based on detection of an opening / closing operation of the operating member by a user.

4. A manual valve that is easy to open and close according to claim 3, characterized in that: The actuating member is fixedly connected to the valve core, and the actuating member is rotatably mounted on the valve body.

5. A manual valve that is easy to open and close according to claim 4, characterized in that: The control unit further includes a rotation direction detection unit installed between the operating member and the valve body for detecting a rotation direction of the operating member relative to the valve body. The control unit is configured to open the bypass valve based on the rotation direction.

6. A manual valve that is easy to open and close according to claim 5, characterized in that: The control unit further comprises a timer for detecting the duration of the fixed rotation direction. The control unit is further configured as follows: If the direction of rotation remains unchanged during the time period T, the bypass valve is opened.

7. A manual valve that is easy to open and close according to claim 4, characterized in that: The operating member also includes: There are at least three positioning posts fixed to the valve body, and the at least three positioning posts are evenly arranged around the actuating member; A positioning plate, supported by the positioning column and located outside the valve cavity, an operating hole is opened in the middle of the positioning plate, and at least a part of the operating member is opened with an external thread matched with the thread of the operating hole; and The first guide sleeve is fixed to the valve body, and the end of the actuating member close to the valve cavity is sealed and matched with a through hole formed in the first guide sleeve.

8. A manual valve that is easy to open and close according to any one of claims 1 to 7, characterized in that: The high-pressure chamber includes an inlet section and an ascending section, and the low-pressure chamber includes an outlet section and a descending section, and the inlet section is in the same direction as the outlet section; The rising section gradually rises from the inner end of the inlet section along the medium flow direction to the side of the valve cavity facing the operating member; The descending section gradually descends from the inner end of the outlet section to a side of the valve cavity away from the operating member along the opposite direction of the medium flow.

9. A manual valve that is easy to open and close according to claim 8, characterized in that: The action member is in contact with the valve core, and the valve core is provided with a fan-shaped protrusion which can drive the valve core to rotate as the medium flows.

10. A manual valve that is easy to open and close according to claim 9, characterized in that: The end of the valve core abutting against the operating member forms a buffer cavity to be gap-matched with the operating member, and an elastic member is arranged between the operating member and the buffer cavity; A second guide sleeve is fixed in the valve cavity, and the valve core is seal-fitted in the second guide sleeve.

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