Stop check valve

Abstract

The utility model belongs to the technical field of valves, and discloses a stop check valve. The stop check valve comprises a valve shell, a valve rod and a valve clack, a liquid inlet flow channel and a liquid outlet flow channel are arranged in the valve shell, a first communication opening is formed between the liquid inlet flow channel and the liquid outlet flow channel, the valve clack is located in the valve shell and used for blocking the first communication opening, one end of the valve rod rotationally stretches into the valve shell and is matched with the valve clack, and the other end of the valve rod rotationally stretches into the valve shell and is matched with the valve clack. A guide rod is arranged at the end, close to the valve rod, of the valve clack and can slide and rotate relative to the valve rod, and blades are arranged at the end, facing the liquid inlet flow channel, of the valve clack. When a medium drives the blades to rotate, the blades drive the valve clack and the guide rod to rotate together, the guide rod rubs with scale between the guide rod and the valve rod in the rotating process, scale accumulation is avoided, and the guide rod is prevented from being blocked.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a globe check valve. Background Art

[0002] The globe check valve is a three-proof valve applied in a water pipeline network, generally applied to the hard water pipeline network in the north, where the water quality is prone to scale formation. The globe check valve usually includes a valve housing, a valve stem and a valve flap. One end of the valve flap close to the valve stem is provided with a guide rod, and the guide rod is inserted and matched with the valve stem and slides relative to the valve stem.

[0003] In the prior art, the contact between the valve stem and the guide rod is a surface contact, and the contact area is large. When scale forms between the valve stem and the guide rod, it is easy to jam the guide rod and prevent it from moving, resulting in the valve flap being unable to open and close normally, thus causing the failure of the globe check valve function.

[0004] Therefore, there is an urgent need to provide a globe check valve to solve the above problems. Summary of the Utility Model

[0005] The purpose of the utility model is to provide a globe check valve, which can avoid the accumulation of scale between the valve stem and the guide rod and prevent the guide rod from being jammed.

[0006] To achieve the above purpose, the utility model adopts the following technical solutions:

[0007] The globe check valve includes a valve housing, a valve stem and a valve flap. An inlet liquid flow channel and an outlet liquid flow channel are arranged in the valve housing. A first communication port is arranged between the inlet liquid flow channel and the outlet liquid flow channel. The valve flap is located in the valve housing and is used to block the first communication port. One end of the valve stem rotatably extends into the valve housing and cooperates with the valve flap. One end of the valve flap close to the valve stem is provided with a guide rod, and the guide rod can slide and rotate relative to the valve stem. One end of the valve flap facing the inlet liquid flow channel is provided with blades.

[0008] As an optional solution, a guide cavity is arranged at one end of the valve stem close to the valve flap, and the guide rod can slide and rotate in the guide cavity.

[0009] As an optional solution, the blades are synchronously rotatably connected to the guide rod.

[0010] As an optional solution, a connecting boss protrudes from one end of the valve flap facing the inlet liquid flow channel. The blades are sleeved on the connecting boss. A locking member is fixedly connected to the free end of the connecting boss, and the locking member abuts against the blades to fixedly connect the blades and the connecting boss.

[0011] As an optional solution, the locking member is a nut, and the nut is threadedly connected to the connecting boss.

[0012] As an alternative, the guide rod is in line contact with the wall of the guide cavity.

[0013] As an alternative, the cross-section of the guide cavity is square, and the cross-section of the guide rod is circular.

[0014] As an alternative, a magnetic member is connected or abutted to one end of the valve stem close to the valve flap. A first accommodation groove is provided on one side surface of the valve flap close to the valve stem. A first magnetic steel is installed in the first accommodation groove, and the magnetic force of the first magnetic steel repels the magnetic member.

[0015] As an alternative, the magnetic member includes a mounting seat and a second magnetic steel. The mounting seat is connected or abutted to the bottom end of the valve stem and sleeved outside the guide rod. A second accommodation groove is formed in the mounting seat, and the second magnetic steel is installed in the second accommodation groove and repels the magnetic force of the first magnetic steel.

[0016] As an alternative, a buckle plate is used to block the notch of the first accommodation groove and / or the second accommodation groove.

[0017] Advantages of the present utility model:

[0018] The present utility model provides a globe check valve. By providing blades at one end of the valve flap facing the liquid inlet channel, when the medium flows in from the liquid inlet channel, the medium can drive the blades to rotate. The blades drive the valve flap and the guide rod to rotate together. During the rotation of the guide rod, it rubs against the scale between the guide rod and the valve stem, avoiding the accumulation of scale and preventing the guide rod from getting stuck. Description of the Drawings

[0019] Figure 1 is a schematic structural diagram of the globe check valve provided by the present utility model;

[0020] Figure 2 is a longitudinal sectional view of the globe check valve provided by the present utility model;

[0021] Figure 3 is a schematic diagram of the cooperation between the valve stem and the valve flap provided by the present utility model.

[0022] In the figure:

[0023] 10. Valve housing; 11. Valve body; 111. Liquid inlet channel; 112. Liquid outlet channel; 113. First communication port; 114. Second communication port; 12. Valve cover; 13. Valve cavity;

[0024] 20. Valve stem; 21. Guide cavity;

[0025] 30. Valve flap; 31. Guide rod; 32. First accommodation groove; 33. First magnet; 34. Sealing gasket; 35. Connecting boss

[0026] 40. Magnetic part; 41. Mounting seat; 411. Second accommodation groove; 42. Second magnet

[0027] 50. Buckle plate; 60. Handwheel; 70. Blade; 80. Locking part Detailed implementation manners

[0028] The present utility model will be further described in detail below with reference to the accompanying drawings and embodiments. It can be understood that the specific embodiments described herein are only used to explain the present utility model, rather than limiting the present utility model. Additionally, it should be noted that for the sake of description, only the parts related to the present utility model rather than all the structures are shown in the accompanying drawings

[0029] In the description of the present utility model, unless otherwise clearly defined and limited, the terms "connected", "connected to", and "fixed" shall be understood in a broad sense. For example, it may be a fixed connection, a detachable connection, or integrated; it may be a mechanical connection or an electrical connection; it may be directly connected, or indirectly connected through an intermediate medium, and it may be the internal communication of two components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in the present utility model can be understood according to specific situations

[0030] In the present utility model, unless otherwise clearly defined and limited, the first feature being "above" or "below" the second feature may include the direct contact between the first and second features, or may include the situation where the first and second features are not in direct contact but in contact through other features therebetween. Moreover, the first feature being "above", "above the", and "on the" second feature includes that the first feature is directly above and obliquely above the second feature, or simply means that the horizontal height of the first feature is higher than that of the second feature. The first feature being "below", "below the", and "under the" second feature includes that the first feature is directly below and obliquely below the second feature, or simply means that the horizontal height of the first feature is lower than that of the second feature

[0031] In the description of this embodiment, the orientation or positional relationships such as "above", "below", "right", etc. are based on the orientation or positional relationships shown in the accompanying drawings. It is only for the convenience of description and simplifying the operation, 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 thus cannot be understood as a limitation to the present utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meanings

[0032] Such as Figure 1 And Figure 2As shown in the figure, this embodiment provides a stop check valve, which includes a valve housing 10, a valve stem 20, and a valve flap 30. The valve housing 10 includes a valve body 11 and a valve cover 12. The valve cover 12 is fastened on the valve body 11 to form a valve cavity 13. The valve body 11 includes a liquid inlet channel 111 and a liquid outlet channel 112 that are located on the same straight line. The liquid inlet channel 111 has a first communication port 113 that communicates with the valve cavity 13, and the liquid outlet channel 112 has a second communication port 114 that communicates with the valve cavity 13. The valve flap 30 is located in the valve cavity 13 and is used to open or seal the first communication port 113. One end of the valve stem 20 rotatably extends into the valve cover 12 and cooperates with the valve flap 30, and the other end extends out of the valve cover 12.

[0033] Specifically, the valve stem 20 is threadedly connected to the valve cover 12. By rotating the valve stem 20 around the axis in different directions, the lifting of the valve stem 20 can be achieved, thereby driving the valve flap 30 to rise or fall, so as to open or seal the first communication port 113 and realize the flow or cutoff of the medium. As Figure 2 shown in the figure, when the valve flap 30 rises to open the first communication port 113, the medium enters the liquid inlet channel 111, enters the valve cavity 13 through the first communication port 113, and then enters the liquid outlet channel 112 through the second communication port 114 for normal water supply; when the valve flap 30 descends to seal and close the first communication port 113, a cutoff is formed between the liquid inlet channel 111 and the liquid outlet channel 112, cutting off the supply of the medium.

[0034] Furthermore, as Figure 2 and Figure 3 shown in the figure, a guide rod 31 is provided at one end of the valve flap 30 close to the valve stem 20. The guide rod 31 is inserted and cooperated with the valve stem 20, and the guide rod 31 can slide and rotate relative to the valve stem 20. A blade 70 is provided at one end of the valve flap 30 facing the liquid inlet channel 111. By providing the blade 70 at one end of the valve flap 30 facing the liquid inlet channel 111, when the medium flows from the liquid inlet channel 111 into the liquid outlet channel 112, the medium can drive the blade 70 to rotate. The blade 70 drives the valve flap 30 and the guide rod 31 to rotate together. During the rotation of the guide rod 31, it rubs against the scale between the guide rod 31 and the valve stem 20, avoiding the accumulation of scale and preventing the guide rod 31 from getting stuck.

[0035] Specifically, a guiding cavity 21 is provided at one end of the valve stem 20 close to the valve flap 30. The guiding rod 31 can slide and rotate within the guiding cavity 21, and the guiding rod 31 and the cavity wall of the guiding cavity 21 can be in surface contact or line contact. When the guiding rod 31 and the cavity wall of the guiding cavity 21 are in surface contact, during the process of the blade 70 driving the guiding rod 31 to rotate within the guiding cavity 21, due to continuous rotation, the accumulation of water scale within the guiding cavity 21 can be avoided, preventing the guiding rod 31 from being stuck within the guiding cavity 21. When the guiding rod 31 and the cavity wall of the guiding cavity 21 are in line contact, during the process of the blade 70 driving the guiding rod 31 to rotate within the guiding cavity 21, the guiding rod 31 rubs against the accumulated water scale within the guiding cavity 21, which can achieve the effect of removing water scale, and also avoid the accumulation of water scale within the guiding cavity 21, preventing the guiding rod 31 from being stuck within the guiding cavity 21.

[0036] Furthermore, the blade 70 is connected to the guiding rod 31 in a synchronously rotatable manner. With this arrangement, when the blade 70 rotates, it can drive the guiding rod 31 to rotate synchronously within the guiding cavity 21, avoiding the accumulation of water scale within the guiding cavity 21.

[0037] Specifically, as Figure 2 and Figure 3 shown, a connecting boss 35 protrudes from one end of the valve flap 30 facing the liquid inlet flow channel 111. The blade 70 is sleeved on the connecting boss 35, and a locking member 80 is fixedly connected to the free end of the connecting boss 35. The locking member 80 abuts against the blade 70 to fixedly connect the blade 70 and the connecting boss 35. By locking the locking member 80 on the connecting boss 35, the blade 70 and the valve flap 30 are fixed as a whole. Since the valve flap 30, the guiding rod 31, and the connecting boss 35 are integrally formed structures, the synchronous rotational connection between the blade 70 and the guiding rod 31 is realized. Furthermore, under the action of the medium, the blade 70 can drive the valve flap 30 and the guiding rod 31 to rotate synchronously.

[0038] In this embodiment, the locking member 80 is a nut, and the nut is threadedly connected to the connecting boss 35. By screwing the nut, the nut abuts against the blade 70, thereby realizing the fixed connection between the blade 70 and the connecting boss 35, ensuring the stability and reliability of their connection, and being convenient for disassembly and assembly and maintenance. In another alternative embodiment, the locking member 80 and the connecting boss 35 can also be connected in a snap-fit, interference-fit, etc. manner, which is not specifically limited herein.

[0039] In this embodiment, the guide rod 31 is in line contact with the wall of the guide cavity 21. By setting the wall of the guide rod 31 and the guide cavity 21 in line contact, the effect of removing scale can be achieved when the guide rod 31 rotates, avoiding the accumulation of scale in the guide cavity 21. Moreover, the contact area between the guide cavity 21 and the guide rod 31 is reduced, and the gap between the guide cavity 21 and the guide rod 31 is increased. Thereby, the resistance of the guide rod 31 to lift and lower in the guide cavity 21 can be reduced, the sensitivity is improved, and the influence of scale formation in the guide cavity 21 on the lifting and lowering of the guide rod 31 is further reduced, making it difficult for the guide rod 31 to be stuck after scale formation in the guide cavity 21.

[0040] In this embodiment, as Figure 3 shown, the cross-section of the guide cavity 21 is square, and the cross-section of the guide rod 31 is circular. With this setting, while the guide rod 31 can rotate in the guide cavity 21 to remove scale, the wall of the guide rod 31 and the guide cavity 21 is in line contact. Compared with the setting where the cross-sections of both the guide cavity 21 and the guide rod 31 are circular, in this embodiment, the square guide cavity 21 and the circular guide rod 31 are matched, changing the contact between the wall of the guide rod 31 and the guide cavity 21 from surface contact to line contact, reducing the contact area between the guide cavity 21 and the guide rod 31, increasing the gap between the guide cavity 21 and the guide rod 31. Thereby, the resistance of the guide rod 31 to lift and lower in the guide cavity 21 can be reduced, and the influence of scale formation in the guide cavity 21 on the lifting and lowering of the guide rod 31 is further reduced, making it difficult for the guide rod 31 to be stuck after scale formation in the guide cavity 21.

[0041] In another alternative embodiment, the cross-sections of both the guide cavity 21 and the guide rod 31 can be set to be circular, that is, the wall of the guide rod 31 is in surface contact with the guide cavity 21. During the process of the blade 70 driving the guide rod 31 to rotate in the guide cavity 21, since it is always rotating, the accumulation of scale in the guide cavity 21 can also be avoided, preventing the guide rod 31 from being stuck in the guide cavity 21.

[0042] In this embodiment, the valve flap 30 of the stop check valve achieves sealing by means of magnetism. Specifically, as Figure 2As shown, one end of the valve stem 20 close to the valve flap 30 is connected or abutted with a magnetic member 40. A first accommodation groove 32 is provided on one side surface of the valve flap 30 close to the valve stem 20. A first magnet 33 is installed in the first accommodation groove 32, and the magnetic force between the first magnet 33 and the magnetic member 40 is repulsive. When the valve stem 20 is rotated downward, it can drive the magnetic member 40 to approach the first magnet 33, and the magnetic repulsive force between the magnetic member 40 and the first magnet 33 presses the valve flap 30 against the port of the first communication port 113 to realize the closing of the valve. When the valve needs to be opened, the valve stem 20 is rotated upward, so that the magnetic member 40 moves away from the first magnet 33, and the magnetic repulsive force received by the first magnet 33 decreases. At this time, the valve flap 30 is in a floating state. When the medium is introduced into the liquid inlet channel 111, the medium pushes the valve flap 30 open, and the guide rod 31 rises along the guide cavity 21. The medium enters the valve cavity 13 through the first communication port 113, and then enters the liquid outlet channel 112 through the second communication port 114 for normal water supply.

[0043] Thus, by using the principle of magnetic repulsion, not only can the valve be closed, but also the valve flap 30 can be kept in a closed state within a certain pressure difference to prevent the faucet from dripping and the water meter from idling. In addition, when the medium flows backward, the medium drives the valve flap 30 to move downward to further close the first communication port 113, and the magnetic repulsive force also presses the valve flap 30 against the first communication port 113, thereby preventing the medium from flowing backward, achieving an effective check valve function, preventing the water meter from rotating backward, and further ensuring the accurate measurement of the water meter.

[0044] In an alternative embodiment, as Figure 2 shown, the magnetic member 40 includes a mounting seat 41 and a second magnet 42. The mounting seat 41 is connected or abutted to the bottom end of the valve stem 20 and sleeved outside the guide rod 31. A second accommodation groove 411 is formed on the mounting seat 41, and the second magnet 42 is installed in the second accommodation groove 411. The second magnet 42 is magnetically repulsive to the first magnet 33, thereby pressing the valve flap 30 against the first communication port 113. In another alternative embodiment, the magnetic member 40 can also be a whole magnet that is magnetically repulsive to the first magnet 33.

[0045] In an alternative embodiment, as Figure 2 shown, the openings of the first accommodation groove 32 and the second accommodation groove 411 are both blocked by a buckle plate 50. By providing the buckle plate 50, each magnet can be blocked in the corresponding accommodation groove to prevent the magnet from detaching from the accommodation groove. In addition, all the magnets are completely coated with non-metals and do not come into direct contact with water to prevent rusting.

[0046] In an alternative embodiment, both the first magnet 33 and the second magnet 42 are annular and are arranged around the guide rod 31. Correspondingly, both the first accommodation groove 32 and the second accommodation groove 411 are annular. Such an arrangement makes the areas of the first magnet 33 and the second magnet 42 large enough to ensure the magnetic repulsive force between the first magnet 33 and the second magnet 42, thereby ensuring the sealing reliability of the valve flap 30. In another alternative embodiment, the first magnet 33 and the second magnet 42 can also be arranged as a plurality of circumferentially spaced and one-to-one corresponding magnets along the guide rod 31.

[0047] In an alternative embodiment, as Figure 2 shown, a sealing gasket 34 is further provided between the valve flap 30 and the top end of the first communication port 113. The sealing gasket 34 is fixed to the lower side of the valve flap 30. The sealing gasket 34 is made of rubber. When the magnetic repulsive force presses the valve flap 30 against the first communication port 113, the valve flap 30 deforms the sealing gasket 34, thereby ensuring the sealing performance of the first communication port 113.

[0048] In an alternative embodiment, as Figure 1 and Figure 2 shown, one end of the valve rod 20 extending out of the valve cover 12 is connected with a handwheel 60. By rotating the handwheel 60, the valve rod 20 can be driven to rotate, which is convenient for the operator to apply force, is convenient and fast to operate, and reduces the use of tools.

[0049] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, rather than limiting the implementation manners of the present invention. For those of ordinary skill in the art, various obvious changes, re-adjustments and substitutions can be made without departing from the protection scope of the present invention. It is not necessary and impossible to enumerate all the implementation manners here. Any modifications, equivalent substitutions and improvements made within the spirit and principle of the present invention shall be included within the protection scope of the claims of the present invention.

Claims

1. A stop check valve, comprising a valve housing (10), a valve stem (20) and a valve flap (30), wherein the valve housing (10) is provided with a liquid inlet channel (111) and a liquid outlet channel (112), a first communication port (113) is provided between the liquid inlet channel (111) and the liquid outlet channel (112), the valve flap (30) is located in the valve housing (10) and is used to block the first communication port (113), one end of the valve stem (20) is rotatably extended into the valve housing (10) and cooperates with the valve flap (30), and is characterized in that: A guide rod (31) is provided at one end of the valve flap (30) close to the valve stem (20), and the guide rod (31) can slide and rotate relative to the valve stem (20). A blade (70) is provided at one end of the valve flap (30) facing the liquid inlet channel (111).

2. The stop check valve according to claim 1, characterized in that: A guide cavity (21) is provided at one end of the valve stem (20) close to the valve flap (30), and the guide stem (31) can slide and rotate in the guide cavity (21).

3. The stop check valve according to claim 1, characterized in that: The blade (70) is connected to the guide rod (31) in a synchronously rotatable manner.

4. The stop check valve according to claim 3, characterized in that: A connecting boss (35) is protrudingly provided at one end of the valve flap (30) facing the liquid inlet channel (111), and the blade (70) is sleeved on the connecting boss (35). A locking member (80) is fixedly connected to the free end of the connecting boss (35), and the locking member (80) is pressed against the blade (70) to fix the blade (70) to the connecting boss (35).

5. The stop check valve according to claim 4, characterized in that: The locking member (80) is a nut, and the nut is threadedly connected to the connecting boss (35).

6. The stop check valve according to claim 2, characterized in that: The guide rod (31) is in linear contact with the cavity wall of the guide cavity (21).

7. The stop check valve according to claim 6, characterized in that: The cross section of the guide cavity (21) is square, and the cross section of the guide rod (31) is circular.

8. The stop check valve according to claim 1, characterized in that: One end of the valve stem (20) close to the valve flap (30) is connected to or abuts against a magnetic member (40); a first accommodating groove (32) is provided on a side surface of the valve flap (30) close to the valve stem (20); a first magnetic steel (33) is installed in the first accommodating groove (32); the magnetic forces of the first magnetic steel (33) and the magnetic member (40) repel each other.

9. The stop check valve according to claim 8, characterized in that: The magnetic member (40) comprises a mounting seat (41) and a second magnetic steel (42); the mounting seat (41) is connected to or abuts against the bottom end of the valve stem (20) and is sleeved outside the guide rod (31); a second accommodating groove (411) is provided on the mounting seat (41); the second magnetic steel (42) is installed in the second accommodating groove (411) and repels the magnetic force of the first magnetic steel (33).

10. The stop check valve according to claim 9, characterized in that: The notch openings of the first accommodating groove (32) and / or the second accommodating groove (411) are blocked with a buckle plate (50).

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