A lock valve

Abstract

The present invention relates to the technical field of heating and water supply valves, and specifically to a locking valve; it comprises a valve body, and a valve core that rotatably cooperates with the valve body, a transition platform is formed on the upper side of the valve body, a valve stem channel extending to the inside of the valve body is formed on the transition platform, a fixed valve stem is arranged in the valve stem channel, and the valve core at the lower end is fixed; the upper side of the fixed valve stem is engaged with the movable valve stem; the upper side of the movable valve stem is fixed to the handle; the movable valve stem moves upward along the valve stem channel, and after the movable valve stem is separated from the fixed valve stem, the movable valve stem is locked in the vertical direction by a locking member, thereby solving the technical problem in the prior art that the valve stem is damaged by a rotational external force after the locking valve is locked.

Description

Technical Field

[0001] The present invention relates to the technical field of heating and water supply valves, and in particular to a locking valve. Background Art

[0002] Valves are control components in fluid delivery systems, with functions such as shutoff, regulation, diversion, backflow prevention, pressure stabilization, diversion or overflow pressure relief. Of course, the realization of the above functions requires the use of different types of valves.

[0003] The master control of each household is in the heating well in the corridor, and the existing valve body cannot be locked. Therefore, there is a loophole, that is, anyone who can open the heating well can adjust the pipeline; but according to management regulations, the heating equipment can only be adjusted and operated by those authorized by the heating company or the personnel of the heating company. Otherwise, once there is a problem with the heating equipment, the responsibility cannot be divided.

[0004] There are also locking valves with locking functions on the market, but the valve body needs to be locked to lock the valve stem; this can also prevent outsiders from adjusting the valve; after the locking valve is locked, the rotation angle of the valve stem and the handle is fixed; although this can ensure that the valve cannot adjust the flow when it is locked, the valve stem and the handle are easily damaged when subjected to force; some people think that dust and humid air penetrate into the valve stem, causing rust and jamming; so they will use tools such as hammers and wrenches to try to turn the handle, which eventually leads to damage to the valve stem or handle, which is also a very difficult problem in reality; based on this technical background, the inventor designed a locking valve. Summary of the Invention

[0005] In order to solve the technical problem in the prior art that after the locking valve is locked, the valve stem is damaged by the external rotation force, the present invention provides a locking valve.

[0006] The technical solution used in the present invention is as follows: a locking valve, including a valve body, and a valve core that rotates with the valve body, a transition platform is formed on the upper side of the valve body, and a valve stem channel extending to the inside of the valve body is formed on the transition platform. The fixed valve stem is arranged in the valve stem channel, and the valve core at its lower end is fixed; the upper side of the fixed valve stem is engaged and disengaged with the movable valve stem; the upper side of the movable valve stem is fixed to the handle; the movable valve stem moves upward along the valve stem channel, and after the movable valve stem is separated from the fixed valve stem, the movable valve stem is locked in the vertical direction by a locking member.

[0007] Furthermore, the fixed valve stem and the movable valve stem are fixed by engaging and disengaging with each other through a snap connection.

[0008] Optionally, a protrusion is provided on the upper side of the fixed valve stem, and a groove corresponding to the protrusion is provided on the lower side of the movable valve stem.

[0009] Optionally, a groove is provided on the upper side of the fixed valve stem, and a protrusion corresponding to the protrusion is provided on the lower side of the movable valve stem.

[0010] Specifically, the valve stem channel is a tapered groove structure, the lower end of the movable valve stem has the same channel width as the tapered groove, and the upper end of the movable valve stem has the same diameter as the tapered end of the tapered groove; a compression spring is passed through the movable valve stem, and the lower end of the movable valve stem and the tapered end of the tapered groove limit the compression spring.

[0011] Specifically, a locking cavity is provided on the side of the transition platform, and a guide groove is provided in the axial direction on the side of the locking cavity close to the valve stem; the guide groove half penetrates the valve stem channel, the locking piece is fitted in the locking cavity, and the locking piece extends into the valve stem channel.

[0012] Furthermore, the locking member is a rod-shaped structure corresponding to the cross-section of the locking cavity and the guide groove.

[0013] Furthermore, the locking part includes a positioning locking part corresponding to the cross-section of the locking cavity and the guide groove, and an installation channel is opened in the middle of the positioning locking part; the rotating locking part is rotatably fitted in the installation channel; a stepped groove is relatively opened on the protruding side of the positioning locking part; the lock core rod is slidably fitted in the stepped groove, and the lock core rod is a cylindrical structure corresponding to the stepped groove; a locking spring is passed through the lock core rod, one side of the locking spring contacts with the protrusion of the lock core rod, and the other side contacts with the stepped groove; a locking hole corresponding to the position of the lock core rod is provided in the guide groove; at the same time, an annular groove is provided on the lock core rod at a position corresponding to the stepped groove, and an ejection part for ejecting the lock core rod is provided on the annular groove.

[0014] Preferably, a filter receiving groove with a cylindrical cross-section is provided on the lower side of the valve core and the valve body; a matching port connected to the filter receiving groove is formed on the lower side of the valve body, the filter is arranged in the filter receiving groove, and the sealing cover matches the matching port for sealing.

[0015] Preferably, an adjustment limit protrusion is provided on the upper side of the transition platform, and a first limit portion and a second limit portion corresponding to the adjustment limit protrusion are provided at the end of the handle; the movable valve stem is separated from the fixed valve stem; and the corresponding angles of the first limit portion and the second limit portion are converted.

[0016] The beneficial effects achieved by the present invention are as follows: after the opening of the valve core is adjusted, the movable valve stem moves upward along the valve stem channel, and the movable valve stem is separated from the fixed valve stem; the locking piece is fitted in the locking cavity, and the lower end of the movable valve stem is located on the upper side of the locking piece, and the lower side of the fixed valve stem is located on the upper side of the upper side of the locking piece. The locking piece separates the movable valve stem from the fixed valve stem and then locks it to prevent the movable valve stem from contacting and fitting with the fixed valve stem; when external force adjusts the movable valve stem to rotate, it will not drive the fixed valve stem to rotate; this not only prevents outsiders from adjusting the valve and prevents users from opening it secretly; it also prevents the movable valve stem and the fixed valve stem from being damaged by external force from outsiders after being locked.

[0017] The present invention also has the following characteristics: impurities in the medium will be blocked by the filter screen, because the filter screen is annular and can therefore provide secondary blocking for the impurities; when too many impurities accumulate on the filter screen, the valve core can be directly closed, and the cover can be opened at this time to take out the filter screen for cleaning or replacement; the filter screen can be replaced without disassembling the pipeline, making the replacement operation more convenient. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the overall structure of the present invention.

[0019] Figure 2 This is a schematic diagram of the movable valve stem and fixed valve stem structure of the present invention. Figure 1 .

[0020] Figure 3 This is a schematic diagram of the movable valve stem and fixed valve stem structure of the present invention. Figure 2 .

[0021] Figure 4 It is a structural schematic diagram of the transition platform of the present invention.

[0022] Figure 5 It is a schematic diagram of the locking cavity structure of the present invention.

[0023] Figure 6 2 is a schematic structural diagram of a first embodiment of a locking member according to the present invention.

[0024] Figure 7 2 is a schematic structural diagram of a second embodiment of the locking member of the present invention.

[0025] Figure 8 It is a schematic structural diagram of the ejection portion of the present invention.

[0026] Figure 9 It is a schematic structural diagram of the positioning locking portion and the rotation locking portion of the present invention.

[0027] Figure 10 It is a schematic diagram of the filter holding tank structure of the present invention.

[0028] Figure 11 It is a schematic diagram of a first matching state of the adjustment limit protrusion and the first limit portion of the present invention.

[0029] Figure 12 It is a schematic diagram of a first matching state of the adjustment limit protrusion and the second limit portion of the present invention.

[0030] Figure 13 It is a schematic diagram of a first matching state of the adjustment limit protrusion and the first limit portion of the present invention.

[0031] Figure 14 It is a schematic diagram of the second matching state of the adjustment limiting protrusion and the second limiting portion of the present invention.

[0032] In the figure, 1. valve body; 2. valve core; 3. transition platform; 4. handle; 5. movable valve stem; 6. fixed valve stem; 7. valve stem channel; 8. compression spring; 9. locking member; 10. locking chamber; 11. guide groove; 12. positioning locking part; 13. rotation locking part; 14. stepped groove; 15. lock core rod; 16. locking spring; 17. annular groove; 18. locking hole; 19. ejection part; 20. filter accommodating groove; 21. matching port; 22. sealing cover; 23. filter; 24. adjustment limit protrusion; 25. first limit part; 26. second limit part. DETAILED DESCRIPTION

[0033] To facilitate those skilled in the art to understand the present invention, specific embodiments of the present invention are described below with reference to the accompanying drawings.

[0034] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components; for ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood based on specific circumstances.

[0035] Currently, there are lock valves with locking functions on the market. After the lock valve is locked, the rotation angle of the valve stem and the handle 4 is fixed. Some people think that dust and moist air penetrate into the valve stem, causing rust and jamming. People who enter the heating well may mistakenly believe that the valve stem cannot be rotated due to rust. So they use tools to try to turn the handle 4, which eventually leads to damage to the valve stem or the handle 4. This is also a very difficult problem in reality. Figure 1As shown, the present invention provides a locking valve, including a valve body 1, a valve core 2 is rotatably fitted in the valve body 1, a transition platform 3 is formed on the upper side of the valve body 1, a valve stem channel 7 extending to the interior of the valve body 1 is formed on the transition platform 3, a fixed valve stem 6 is arranged in the valve stem channel 7, and the valve core 2 is fixed at the lower end thereof; the upper side of the fixed valve stem 6 is fixedly fitted with a movable valve stem 5, the upper end of the movable valve stem 5 is an external threaded structure, which extends out of the valve stem channel 7 and is fixed to the handle 4 through a nut on the handle 4; when the movable valve stem 5 is fitted with the fixed valve stem 6, the movable valve stem 5 is linked with the fixed valve stem 6, and the movable valve stem 5 is driven by the handle 4 The movable valve stem 5 is locked in the vertical direction and separated from the fixed valve stem 6. When the movable valve stem 5 is rotated in synchronization with the fixed valve stem 6, the fixed valve stem 6 drives the valve core 2 to rotate in the valve body 1 to realize the control and adjustment of the valve opening; after closing or opening the appropriate valve opening, the movable valve stem 5 is moved upward along the valve stem channel 7, and the movable valve stem 5 is separated from the fixed valve stem 6; after the movable valve stem 5 is locked in the vertical direction, the movable valve stem 5 is separated from the fixed valve stem 6, and when an external force is used to adjust the movable valve stem 5 to rotate, it will not drive the fixed valve stem 6 to rotate; this not only prevents outsiders from adjusting the valve, but also prevents the movable valve stem 5 and the fixed valve stem 6 from being damaged by external forces after being locked.

[0036] The fixed valve stem 6 and the movable valve stem 5 are fixed by means of a snap connection; Figure 2-3 As shown, one embodiment is that a "I"-shaped protrusion is provided on the upper side of the fixed valve stem 6, and a "I"-shaped groove corresponding to the protrusion is provided on the lower side of the movable valve stem 5; when the fixed valve stem 6 and the movable valve stem 5 are fixed in cooperation, the protrusion is inserted into the groove; the axial cooperation is limited, and the movable valve stem 5 and the fixed valve stem 6 are driven to rotate synchronously by the handle 4; another embodiment is that a "I"-shaped groove is provided on the upper side of the fixed valve stem 6, and a "I"-shaped protrusion corresponding to the protrusion is provided on the lower side of the movable valve stem 5; when the protrusion is engaged with the groove, it is not convenient for the protrusion to be engaged in the groove, so inclined transition chamfers are provided on both sides of the protrusion to facilitate the protrusion to be engaged in the groove.

[0037] Furthermore, the valve stem channel 7 is a tapered groove structure, the lower end of the movable valve stem 5 has the same channel width as the tapered groove, and the upper end of the movable valve stem 5 has the same diameter as the tapered part of the tapered groove; a compression spring 8 is passed through the movable valve stem 5, and the lower end of the movable valve stem 5 and the tapered part of the tapered groove limit the compression spring 8; the movable valve stem 5 moves upward along the valve stem channel 7, and the movable valve stem 5 is separated from the fixed valve stem 6, squeezing the compression spring 8; when the movable valve stem 5 is engaged with the fixed valve stem 6, the compression spring 8 provides a restoring force to enable the protrusion and the groove to engage and clamp.

[0038] The movable valve stem 5 moves upward along the valve stem channel 7 to separate the movable valve stem 5 from the fixed valve stem 6 and is locked by the locking member 9; Figure 5-6As shown, the locking cavity 10 is horizontally perpendicular to the valve body 1 at the top of the valve body 1 near the transition platform 3, and a guide groove 11 with a semicircular cross-section is provided in the axial direction on the side of the locking cavity 10 near the valve stem; the guide groove 11 half passes through the valve stem channel 7, and the locking member 9 is fitted in the locking cavity 10, and the locking member 9 extends into the valve stem channel 7; after the opening of the valve core 2 is adjusted, the movable valve stem 5 moves upward along the valve stem channel 7, and the movable valve stem 5 is separated from the fixed valve stem 6; the locking member 9 is fitted in the locking cavity 10, and the movable valve stem 5 is separated from the fixed valve stem 6. The lower end of the valve stem 5 is located on the upper side of the locking piece 9, and the lower side of the fixed valve stem 6 is located on the upper side of the upper side of the locking piece 9. The locking piece 9 separates the movable valve stem 5 from the fixed valve stem 6 and then locks it to prevent the movable valve stem 5 from contacting and cooperating with the fixed valve stem 6. When an external force adjusts the movable valve stem 5 to rotate, it will not drive the fixed valve stem 6 to rotate. This prevents outsiders from adjusting the valve and prevents users from opening it secretly. At the same time, it prevents the movable valve stem 5 and the fixed valve stem 6 from being damaged by external forces after being locked.

[0039] Further, if Figure 6 As shown, one embodiment of the locking member 9 is a rod-shaped structure corresponding to the cross section of the locking cavity 10 and the guide groove 11; a channel is opened on the side of the locking cavity 10, and a threaded hole is opened on the locking member 9 at a position corresponding to the channel of the locking cavity 10; after the opening of the valve core 2 is adjusted, the movable valve stem 5 moves upward along the valve stem channel 7, and the movable valve stem 5 is separated from the fixed valve stem 6; the locking member 9 is inserted into the locking cavity 10; the threaded hole on it is aligned with the channel of the locking cavity 10, and fixed by bolts; as shown Figure 7-9As shown, another embodiment of the locking member 9 is that it includes a positioning locking portion 12 corresponding to the cross section of the locking cavity 10 and the guide groove 11, and a mounting channel of a circular cross section is provided in the middle of the positioning locking portion 12; the rotating locking portion 13 is rotatably fitted in the mounting channel; two stepped grooves 14 are relatively provided on the protruding side of the positioning locking portion 12, and the stepped groove 14 is a cylindrical cross section with a larger middle portion and smaller sides; the lock core rod 15 is slidably fitted in the stepped groove 14, and the lock core rod 15 is a cylindrical structure corresponding to the stepped groove 14; a locking spring 16 is passed through the lock core rod 15, and one side of the locking spring 16 contacts with the protrusion of the lock core rod 15, and the other side contacts with the stepped groove 14; a projection corresponding to the position of the lock core rod 15 is provided in the guide groove 11 Locking hole 18; at the same time, an annular groove 17 is provided on the lock core rod 15 at a position corresponding to the stepped groove 14, and an ejection portion 19 for ejecting the lock core rod 15 is provided on the annular groove 17; in a natural state, the lock core rod 15 is retracted into the stepped groove 14 by the locking spring 16, and the end of the lock core rod 15 contacts the annular groove 17; after the opening of the valve core 2 is adjusted, the movable valve stem 5 moves upward along the valve stem channel 7, and the movable valve stem 5 is separated from the fixed valve stem 6; the positioning locking portion 12 is inserted into the locking cavity 10, and the rotating locking portion 13 is rotated, and the ejection portion 19 of the lock core rod 15 squeezes the lock core rod 15, so that the lock core rod 15 extends out of the stepped groove 14 and is stuck in the locking hole 18; the positioning locking portion 12 is fixed in the locking cavity 10.

[0040] Furthermore, a channel is provided at the end of the rotation locking portion 13 ; a special unlocking piece is inserted into the channel to unlock the rotation locking portion 13 .

[0041] The medium in the pipeline often contains various impurities. Excessive impurities will clog the pipeline and affect the normal supply of the medium. Therefore, it is often necessary to filter the medium in the pipeline and clean the filtered impurities out of the pipeline. Therefore, a filter 23 is often set on the pipeline near the valve. However, the integration of the valve is low and the space occupied is large. Figure 10 As shown, a filter receiving groove 20 with a cylindrical cross-section is provided on the lower side of the valve core 2 and the valve body 1; a mating port 21 connected to the filter receiving groove 20 is formed on the lower side of the valve body 1, and the outer side of the mating port 21 is an external thread structure; a ring-shaped filter 23 is arranged in the filter receiving groove 20, and the cover 22 is threadedly fitted with the mating port 21 for sealing; when the valve core 2 is opened, impurities in the medium will be blocked by the filter 23, because the filter 23 is ring-shaped, it can provide a secondary stop for impurities; when too many impurities accumulate on the filter 23; the valve core 2 can be directly closed, and the cover 22 can be opened at this time to take out the filter 23 for cleaning or replacement; the filter 23 can be replaced without disassembling the pipeline, and the replacement operation is simpler.

[0042] like Figure 11-14As shown, an adjusting limit protrusion 24 is provided on the upper side of the transition platform 3, and a first limit portion 25 and a second limit portion 26 corresponding to the adjusting limit protrusion 24 are provided at the end of the handle 4; when the adjusting limit protrusion 24 contacts the first limit portion 25, the valve core 2 is opened, and when the adjusting limit protrusion 24 contacts the second limit portion 26, the valve core 2 is closed; since the valve stem of this device is a clutch matching structure, when the movable valve stem 5 moves upward along the valve stem channel 7, the movable valve stem 5 is separated from the fixed valve stem 6; the movable valve stem 5 is rotated 180 degrees to match the fixed valve stem 6; at this time, the valve core 2 of this device changes the working mode, and when the adjusting limit protrusion 24 contacts the first limit portion 25 or the second limit portion 26, the valve core 2 opens the rated opening; it is suitable for occasions where a rated opening is required.

[0043] Unless otherwise specified above, the fixing methods generally used by those skilled in the art include welding, nesting, or threaded fixing.

[0044] Throughout this specification, references to terms such as "one embodiment," "example," or "specific example" indicate that the specific features, structures, materials, or characteristics described in conjunction with that embodiment or example are included in at least one embodiment or example of the present invention. In this specification, schematic representations of these terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in any one or more embodiments or examples.

[0045] The above-described embodiments of the present invention do not limit the scope of protection of the present invention. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included in the scope of protection of the claims of the present invention.

Claims

1. A lock valve, characterized in that: The invention comprises a valve body (1) and a valve core (2) which is rotatably matched with the valve body (1); a transition platform (3) is formed on the upper side of the valve body (1); a valve stem channel (7) extending to the interior of the valve body (1) is formed on the transition platform (3); a fixed valve stem (6) is arranged in the valve stem channel (7), and the valve core (2) is fixed at its lower end; the upper side of the fixed valve stem (6) is engaged and disengaged with the movable valve stem (5); the upper side of the movable valve stem (5) is fixed to the handle (4); the movable valve stem (5) moves upward along the valve stem channel (7), and after the movable valve stem (5) is separated from the fixed valve stem (6); the movable valve stem (5) is locked in the vertical direction by a locking member (9); the transition platform (3) is fixed to the valve stem channel (7); the movable valve stem (5) is locked in the vertical direction by a locking member (9 ... An adjusting limit protrusion (24) is provided on the upper side, and a first limit portion (25) and a second limit portion (26) corresponding to the adjusting limit protrusion (24) are provided at the end of the handle (4); when the adjusting limit protrusion (24) contacts the first limit portion (25), the valve core (2) is fully opened, and when the adjusting limit protrusion (24) contacts the second limit portion (26), the valve core (2) is closed; the movable valve stem (5) is separated from the fixed valve stem (6); the movable valve stem (5) is rotated 180 degrees to cooperate with the fixed valve stem (6); when the adjusting limit protrusion (24) contacts the first limit portion (25) or the second limit portion (26), the valve core (2) is opened to the rated opening.

2. The lock valve according to claim 1, characterized in that: The fixed valve stem (6) and the movable valve stem (5) are fixed by engaging and disengaging in a snap-fit ​​manner.

3. The lock valve according to claim 2, characterized in that: A protrusion is provided on the upper side of the fixed valve stem (6), and a groove corresponding to the protrusion is provided on the lower side of the movable valve stem (5).

4. The lock valve according to claim 2, characterized in that: The upper side of the fixed valve stem (6) is provided with a groove, and the lower side of the movable valve stem (5) is provided with a protrusion corresponding to the protrusion.

5. The lock valve according to claim 1, characterized in that: The valve stem channel (7) is a constricted groove structure, the lower end of the movable valve stem (5) has the same width as the channel of the constricted groove, and the upper end of the movable valve stem (5) has the same diameter as the constricted portion of the constricted groove; a compression spring (8) is passed through the movable valve stem (5), and the lower end of the movable valve stem (5) and the constricted portion of the constricted groove limit the compression spring (8).

6. The lock valve according to claim 1, characterized in that: A locking cavity (10) is provided on the side of the transition platform (3), and a guide groove (11) is provided on the side of the locking cavity (10) close to the valve stem in the axial direction; the guide groove (11) half penetrates the valve stem channel (7), and the locking member (9) is fitted in the locking cavity (10), and the locking member (9) extends into the valve stem channel (7).

7. The lock valve according to claim 6, characterized in that: The locking member (9) is a rod-shaped structure corresponding to the cross-section of the locking cavity (10) and the guide groove (11).

8. The lock valve according to claim 6, characterized in that: The locking member (9) includes a positioning locking portion (12) corresponding to the cross section of the locking cavity (10) and the guide groove (11), and a mounting channel is provided in the middle of the positioning locking portion (12); a rotating locking portion (13) is rotationally engaged in the mounting channel; a stepped groove (14) is relatively provided on a protruding side of the positioning locking portion (12); a lock core rod (15) is slidably engaged in the stepped groove (14), and the lock core rod (15) is a cylindrical structure corresponding to the stepped groove (14); A locking spring (16) is passed through the lock core rod (15), one side of the locking spring (16) contacts the protrusion of the lock core rod (15), and the other side contacts the stepped groove (14); a locking hole (18) corresponding to the position of the lock core rod (15) is provided in the guide groove (11); and an annular groove (17) is provided on the lock core rod (15) at a position corresponding to the stepped groove (14), and an ejection portion (19) for ejecting the lock core rod (15) is provided on the annular groove (17).

9. The lockshield valve according to claim 1, characterized in that: The valve core (2) and the valve body (1) are provided with a filter receiving groove (20) with a cylindrical cross section on the lower side; a matching opening (21) communicating with the filter receiving groove (20) is formed on the lower side of the valve body (1); a filter (23) is arranged in the filter receiving groove (20), and a cover (22) matches the matching opening (21) to seal.

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