Water replenishing valve

Abstract

The utility model discloses a water replenishing valve which comprises a valve body, the valve body comprises a first channel, a second channel and an installation cavity, a second sealing cavity is formed in the upper portion of the installation cavity, a valve rod is installed in the installation cavity and can move up and down, the valve rod comprises a sealing section, and the sealing section can be inserted into or separated from the second sealing cavity. The side wall of the sealing section and the side wall of the second sealing cavity are sealed through a first sealing piece, the sealing section is inserted into the second sealing cavity so that the first channel and the second channel can be blocked, and the sealing section is separated from the second sealing cavity so that the first channel and the second channel can be communicated. By arranging the first sealing ring, peripheral sealing of the second sealing cavity is achieved, on the premise that the sealing performance is guaranteed, rotation of the valve rod is facilitated, and communication of the first channel and the second channel is facilitated.

Description

Technical Field

[0001] The utility model relates to the technical field of wall-hung boilers, and more specifically, to a water replenishing valve. Background Art

[0002] After the internal circulation water path in the water path component system of the wall-hung boiler has been running for a long time, the water in the internal circulation water path will gradually decrease. Therefore, it is necessary to supplement water to the internal circulation water path through a water replenishing valve. Most of the existing water replenishing valves for wall-hung boilers are manual water replenishing valves. The water replenishing valve is opened by turning the valve stem of the water replenishing valve to replenish water to the internal circulation water path.

[0003] The existing manual water replenishing valve has the following deficiencies: First, at present, the two channels of the water replenishing valve are sealed by the end face of the gasket. When the tightening force is too large (the tightening force varies greatly from person to person), the gasket will be embedded too much in the sealing cavity, resulting in damage to the gasket and affecting its sealing performance. Second, due to the large contact area between the gasket and the sealing cavity and the lack of limit when tightening, when the tightening force is large, it will be difficult to loosen the valve stem after the product has been used for a period of time, and normal water replenishment cannot be achieved, affecting the user experience. Third, at present, the valve stem and the valve body on the market are connected by ordinary threads. When opening the water replenishing valve, the valve stem needs to be rotated many times to fully open the water replenishing valve, which is inconvenient to operate and affects the user experience. Therefore, it is urgent to improve this situation. Summary of the Utility Model

[0004] The purpose of the utility model is to overcome the above-mentioned deficiencies of the prior art and provide a water replenishing valve. By setting a first sealing ring, the circumferential sealing of the second sealing cavity is realized. On the premise of ensuring the sealing performance, it is beneficial to the rotation of the valve stem and facilitates the communication between the first channel and the second channel.

[0005] In order to achieve the above purpose, the utility model adopts the following technical solutions:

[0006] The utility model discloses a water replenishing valve, which comprises a valve body. The valve body includes a first channel, a second channel and an installation cavity. A second sealing cavity is arranged at the upper part of the installation cavity. A valve stem is installed in the installation cavity. The valve stem can move up and down. The valve stem includes a sealing section. The sealing section can be inserted into or separated from the second sealing cavity. The side wall of the sealing section and the side wall of the second sealing cavity are sealed by a first sealing member. The sealing section is inserted into the second sealing cavity to block the first channel and the second channel. The sealing section is separated from the second sealing cavity to communicate the first channel and the second channel.

[0007] Furthermore, a first annular groove is arranged on the side surface of the sealing section. The first sealing member is sleeved in the first annular groove. The outer periphery of the first sealing member can be sealingly matched with the inner wall of the second sealing cavity.

[0008] Further, the valve stem includes a threaded section located in the installation cavity. The installation cavity includes a connection cavity, and the threaded section is threadedly connected to the inner wall of the connection cavity.

[0009] Further, the threaded section is a multi-start thread.

[0010] Further, the valve stem includes a first connection section located in the installation cavity. The installation cavity includes a first sealing cavity. The first connection section and the side wall of the first sealing cavity are sealed by a second sealing member. A second annular groove is provided on the side wall of the first connection section. The second sealing member is sleeved in the second annular groove, and the outer periphery of the second sealing member is in sealing fit with the side wall of the first sealing cavity.

[0011] Further, the first connection section is located below the sealing section, the threaded section is located below the first connection section, and a second connection section is provided below the threaded section. The lower end of the second connection section extends beyond one end of the installation cavity away from the second sealing cavity.

[0012] Further, a sealing gasket is fixed on the outside of the sealing section. The position of the sealing gasket is lower than that of the first sealing member. The sealing gasket can block or disengage from the lower opening of the second sealing cavity.

[0013] Further, a shaping cover is sleeved on the outside of the sealing section. The shaping cover includes a shaping groove. The lower end of the sealing gasket is inserted into the shaping groove. The upper part of the shaping cover can abut against the lower end face of the second sealing cavity, and the lower part of the shaping cover abuts against the upper part of the first connection section.

[0014] Further, it also includes a bolt. The valve body includes a limiting hole. At least one end of the bolt is inserted into the limiting hole. At least a part of the bolt is located in the installation cavity. The side of the threaded section facing the first connection section can abut against or be away from the part of the bolt located in the installation cavity.

[0015] Further, a boss is provided on the side of the threaded section facing the first connection section. The bolt includes a limiting section and a bent section. The limiting section is inserted into the limiting hole, and the bent section is located outside the valve body. The boss can abut against the side of the limiting section. A limiting groove is provided on the outer wall of the installation cavity, and the end of the bent section is inserted into the limiting groove for limiting.

[0016] The beneficial effects of the present utility model are:

[0017] 1. The water replenishment and sealing are better. By setting the first sealing member, the side wall sealing of the second sealing cavity can be realized. Not only is the sealing reliable, but also because it is a circumferential sealing, when tightened in place, regardless of whether the tightening force of the valve stem is too large or too small, the deformation amplitude of the first sealing member will not change. Therefore, not only can the sealing performance of the second sealing cavity be ensured, but also the loosening of the valve stem will not be affected. The tightening or loosening force is small, and the user experience is good.

[0018] 2. Achieve a rapid water replenishment effect. By setting a multi-start thread, when water replenishment is required, the valve stem only needs to rotate one circle to achieve the effect of the original rotation of 8 circles, and the effect is increased by 8 times. The first channel and the second channel can be connected to conduct water replenishment. After the water replenishment is completed, the valve stem only needs to rotate one circle in the reverse direction, and the first channel and the second channel can be blocked, which is convenient to operate and provides a good user experience;

[0019] 3. The valve stem can be limited in both tightening and loosening. When the tightening force of the valve stem is too large, since the convex platform abuts against the side surface of the limiting section, the valve stem can be prevented from continuing to penetrate. The valve stem is also limited when it is screwed out, realizing the function of limiting the valve stem in both tightening and loosening, and the structural reliability is good. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a schematic structural diagram of this embodiment;

[0021] Figure 2 is an exploded view of this embodiment;

[0022] Figure 3 is a cross-sectional view of this embodiment;

[0023] Figure 4 is Figure 3 an enlarged view at A;

[0024] Figure 5 is a cross-sectional view after this embodiment is opened;

[0025] Figure 6 is a cross-sectional view of the top view of this embodiment;

[0026] Figure 7 is a plan view of the threaded section.

[0027] Reference numerals: 1. Valve body; 11. First channel; 12. Second channel; 13. Installation cavity; 131. First sealing cavity; 132. Connection cavity; 14. Second sealing cavity; 15. Limiting hole; 16. Limiting groove; 2. Valve stem; 21. Sealing section; 22. First annular groove; 23. First connection section; 24. Second annular groove; 25. Threaded section; 26. Convex platform; 27. Second connection section; 28. Slot; 3. First sealing member; 4. Second sealing member; 5. Sealing gasket; 6. Shaping cover; 61. Shaping groove; 7. Plug pin; 71. Limiting section; 72. Bent section. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0028] Next, the technical solutions in the embodiments of the present invention will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present invention. Obviously, the described embodiments are only a part of the embodiments of the present invention, rather than all the embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present invention without creative efforts shall fall within the protection scope of the present invention.

[0029] As Figures 1 to 7 shown, a water replenishing valve includes a valve body 1. The valve body 1 includes a first channel 11, a second channel 12, and an installation cavity 13. A second sealing cavity 14 is provided in the upper part of the installation cavity 13. A valve rod 2 is installed in the installation cavity 13. The valve rod 2 can move up and down. The valve rod 2 includes a sealing section 21. The sealing section 21 can be inserted into or disengaged from the second sealing cavity 14. The side wall of the sealing section 21 and the side wall of the second sealing cavity 14 are sealed by a first sealing member 3. When the sealing section 21 is inserted into the second sealing cavity 14, the first channel 11 and the second channel 12 are blocked. When the sealing section 21 disengages from the second sealing cavity 14, the first channel 11 and the second channel 12 are communicated. Specifically, the valve rod 2 includes a threaded section 25. The threaded section 25 is located in the installation cavity 13. The installation cavity 13 includes a connecting cavity 132. The threaded section 25 is threadedly connected to the inner wall of the connecting cavity 132. By rotating the valve rod 2, the up and down movement of the valve rod 2 can be realized, so that the sealing section 21 can be inserted into or disengaged from the second sealing cavity 14, and the blocking or communication of the first channel 11 and the second channel 12 can be realized. The first sealing member 3 is an O-ring, and the water replenishing seal is better. By providing the first sealing member 3, the side wall sealing of the second sealing cavity 14 can be realized. Not only is the sealing reliable, but also because it is a circumferential seal, when tightened in place, no matter whether the tightening force of the valve rod 2 is too large or too small, the deformation amplitude of the first sealing member 3 will not change. Thus, not only can the sealing performance of the second sealing cavity 14 be ensured, but also the loosening of the valve rod 2 will not be affected. The tightening or loosening force is small, and the user experience is good.

[0030] A first annular groove 22 is provided on the side surface of the sealing section 21. The first sealing member 3 is sleeved in the first annular groove 22. The outer periphery of the first sealing member 3 can be in sealing cooperation with the inner wall of the second sealing cavity 14. By providing the first annular groove 22, the installation limit of the first sealing member 3 can be realized, and the first sealing member 3 can be prevented from falling off during the movement of the valve rod 2.

[0031] As Figure 3 and Figure 7As shown, the threaded section 25 is a multi-start thread. In the present utility model, the threaded section 25 is a four-start thread, and the pitch of the inner wall thread of the connection cavity 132 is 2 mm. Therefore, when the valve stem 2 rotates one circle, the moving distance of the valve stem 2 is 8 mm. At this time, the first channel 11 and the second channel 12 can just be connected or blocked. Thus, by setting a multi-start thread, when water needs to be replenished, the valve stem 2 only needs to rotate one circle to achieve the effect of the existing single-start thread rotating eight circles. The first channel 11 and the second channel 12 can be connected to replenish water. After the water replenishment is completed, the valve stem 2 only needs to rotate one circle in the reverse direction, and the first channel 11 and the second channel 12 can be blocked. The operation is convenient and the user experience is good.

[0032] As Figure 2 and Figure 3 shown, the valve stem 2 includes a first connection section 23. The first connection section 23 is located below the sealing section 21. The threaded section 25 is located below the first connection section 23. The first connection section 23 is located in the installation cavity 13. The installation cavity 13 includes a first sealing cavity 131. The first connection section 23 and the side wall of the first sealing cavity 131 are sealed by a second sealing member 4. A second annular groove 24 is provided on the side wall of the first connection section 23. The second sealing member 4 is sleeved in the second annular groove 24. The outer periphery of the second sealing member 4 is in sealing cooperation with the side wall of the first sealing cavity 131. The second sealing member 4 is also an O-ring. Through the cooperation of the first sealing cavity 131 and the second sealing member 4, it can prevent the liquid in the first channel 11 or the second channel 12 from leaking from the lower opening of the installation cavity 13.

[0033] A second connection section 27 is provided below the threaded section 25. The lower end of the second connection section 27 extends beyond one end of the installation cavity 13 away from the second sealing cavity 14. The second connection section 27 is a handle section, which is exposed outside the valve body 1. And a slot 28 is further provided at the lower part of the second connection section 27. When replenishing water, a tool can be inserted into the slot 28 to rotate the valve stem 2, and the operation is convenient.

[0034] As Figures 2 to 4 shown, a sealing gasket 5 is fixed on the outside of the sealing section 21. The position of the sealing gasket 5 is lower than that of the first sealing member 3. The sealing gasket 5 can block or disengage from the lower opening of the second sealing cavity 14. By providing the sealing gasket 5, the lower port of the second sealing cavity 14 can be sealed, and in cooperation with the first sealing member 3, double sealing of the second sealing cavity 14 can be achieved, greatly improving the sealing effect of the second sealing cavity 14 and effectively ensuring the blocking of the first channel 11 and the second channel 12.

[0035] A shaping cover 6 is sleeved outside the sealing section 21. The shaping cover 6 includes a shaping groove 61. The lower end of the sealing gasket 5 is inserted into the shaping groove 61. The upper part of the shaping cover 6 can abut against the lower end face of the second sealing cavity 14, and the lower part of the shaping cover 6 abuts against the upper part of the first connection section 23. By providing the shaping cover 6, the installation and shaping of the sealing gasket 5 can be limited. When the tightening force of the valve stem 2 is too large, the valve stem 2 can be prevented from further penetrating by the upper end of the shaping cover 6 abutting against the lower part of the second sealing cavity 14, so as to effectively prevent the problem that the valve stem 2 cannot be loosened due to excessive tightening force.

[0036] As Figure 2 , Figure 3 and Figure 6 shown, it further includes a bolt 7. The valve body 1 includes a limit hole 15. At least one end of the bolt 7 is inserted into the limit hole 15, and at least part of the bolt 7 is located in the installation cavity 13. The side of the threaded section 25 facing the first connection section 23 can abut against or be away from the part of the bolt 7 located in the installation cavity 13. Specifically, a boss 26 is provided on the side of the threaded section 25 facing the first connection section 23. The bolt 7 includes a limit section 71 and a bent section 72. The limit section 71 is inserted into the limit hole 15, and the bent section 72 is located outside the valve body 1. The boss 26 can abut against the side of the limit section 71. A limit groove 16 is provided on the outer wall of the installation cavity 13, and the end of the bent section 72 is inserted into the limit groove 16 for limiting.

[0037] Before installing the valve stem 2, first insert the limit section 71 of the bolt 7 into the installation cavity 13 from the limit hole 15, and then install the valve stem 2. When the tightening force of the valve stem 2 is too large, since the boss 26 abuts against the side of the limit section 71, the valve stem 2 can be prevented from further penetrating, realizing the function of tightening limit of the valve stem 2, and the structural reliability is good. When the water replenishing valve needs to be opened, loosen the valve stem 2, and the lower part of the first connection section 23 can abut against the limit section 71, thereby preventing the valve stem 2 from being unscrewed. Through the cooperation of the bent section 72 and the limit groove 16, the installation of the bolt 7 can be limited to prevent the bolt 7 from falling off.

[0038] The above are only the preferred embodiments of the present invention. The protection scope of the present invention is not limited to the above embodiments. All technical solutions falling within the idea of the present invention belong to the protection scope of the present invention. It should be noted that for those of ordinary skill in the art, without departing from the principle of the present invention, several improvements and refinements should also be regarded as the protection scope of the present invention.

Claims

1. A water supply valve, characterized in that: The invention comprises a valve body (1), wherein the valve body (1) comprises a first channel (11), a second channel (12) and an installation cavity (13); a second sealing cavity (14) is arranged on the upper part of the installation cavity (13); a valve stem (2) is installed in the installation cavity (13); the valve stem (2) can move up and down; the valve stem (2) comprises a sealing section (21); the sealing section (21) can be inserted into or separated from the second sealing cavity (14); a side wall of the sealing section (21) and a side wall of the second sealing cavity (14) are sealed by a first sealing member (3); the sealing section (21) is inserted into the second sealing cavity (14) so ​​as to block the first channel (11) and the second channel (12); the sealing section (21) is separated from the second sealing cavity (14) so ​​as to communicate the first channel (11) and the second channel (12).

2. A water supply valve according to claim 1, characterized in that: A first annular groove (22) is provided on the side of the sealing section (21), the first sealing member (3) is sleeved in the first annular groove (22), and the outer periphery of the first sealing member (3) can be sealed and matched with the inner wall of the second sealing cavity (14).

3. A water supply valve according to claim 1, characterized in that: The valve stem (2) comprises a threaded section (25), the threaded section (25) is located in the installation cavity (13), the installation cavity (13) comprises a connecting cavity (132), and the threaded section (25) is threadedly connected to the inner wall of the connecting cavity (132).

4. A water supply valve according to claim 3, characterized in that: The thread section (25) is a multi-start thread.

5. A water supply valve according to claim 3, characterized in that: The valve stem (2) includes a first connecting section (23), the first connecting section (23) is located in the installation cavity (13), the installation cavity (13) includes a first sealing cavity (131), the first connecting section (23) and the side wall of the first sealing cavity (131) are sealed by a second sealing member (4), the side wall of the first connecting section (23) is provided with a second annular groove (24), the second sealing member (4) is sleeved in the second annular groove (24), and the outer periphery of the second sealing member (4) is sealed and matched with the side wall of the first sealing cavity (131).

6. A water supply valve according to claim 5, characterized in that: The first connecting section (23) is located at the lower part of the sealing section (21), the threaded section (25) is located at the lower part of the first connecting section (23), a second connecting section (27) is provided at the lower part of the threaded section (25), and the lower end of the second connecting section (27) extends beyond the installation cavity (13) and is away from one end of the second sealing cavity (14).

7. A water supply valve according to claim 1, characterized in that: A sealing gasket (5) is fixed on the outside of the sealing section (21); the sealing gasket (5) is located lower than the first sealing member (3); and the sealing gasket (5) can block or detach from the lower opening of the second sealing cavity (14).

8. A water supply valve according to claim 7, characterized in that: A shaping cover (6) is sleeved on the outside of the sealing section (21), the shaping cover (6) comprising a shaping groove (61), the lower end of the sealing gasket (5) is inserted into the shaping groove (61), the upper part of the shaping cover (6) is capable of abutting against the lower end surface of the second sealing cavity (14), and the lower part of the shaping cover (6) abuts against the upper part of the first connecting section (23).

9. A water supply valve according to claim 3, characterized in that: It also includes a latch (7), the valve body (1) includes a limiting hole (15), at least one end of the latch (7) is inserted into the limiting hole (15), the latch (7) is at least partially located in the installation cavity (13), and the threaded section (25) is able to abut against or move away from the portion of the latch (7) located in the installation cavity (13) on the side facing the first connecting section (23).

10. A water supply valve according to claim 9, characterized in that: The threaded section (25) is provided with a boss (26) on one side facing the first connecting section (23); the latch (7) comprises a limiting section (71) and a bending section (72); the limiting section (71) is inserted into the limiting hole (15); the bending section (72) is located outside the valve body (1); the boss (26) can abut against the side of the limiting section (71); the outer wall of the mounting cavity (13) is provided with a limiting groove (16); the end of the bending section (72) is inserted into the limiting groove (16) for limiting.

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