Self-locking flush valve

Abstract

The utility model discloses a self-locking flush valve which comprises a valve body, a valve element, a gland, a pressing spring, a drum-shaped compression spring and a bottom cover. A water inlet and a water outlet are formed in the valve body, and a water passing opening communicated with the water inlet and the water outlet is formed in the valve body. The valve element comprises a valve rod and a valve head connected with the valve rod, the valve head is in sealing fit with the water passing opening, and the valve rod penetrates through the valve body and then is connected with the gland. The pressing spring is installed in a first space formed by the upper end of the valve body and the gland, and the pressing spring is arranged on the valve rod in a sleeving mode. The bottom cover is mounted at the lower end of the valve body; the drum-shaped compression spring is installed in a second space formed by the bottom cover and the lower end of the valve body, and the drum-shaped compression spring abuts against the valve head. According to the self-locking type flush valve, the drum-shaped compression spring is arranged to play a role in assisting the flush valve to be closed, the stress of the compression spring on the upper portion is reduced, the friction force and the torsion force between the compression spring and the gland are correspondingly reduced, the reliability of the self-locking type flush valve is improved, and the service life of the self-locking type flush valve is prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a self-locking flushing valve. Background Art

[0002] In public health facilities, especially public restrooms, flush valves are core components of toilet flush pipes, ensuring flushing. Currently, flush valves installed on public restroom flush pipes rely entirely on a spring mounted within the upper cover to close the valve. This spring generates rotational torque and friction when in motion, and the greater the pressure from the upper cover on the spring, the greater the friction and torque between it and the cover. Due to frequent and long-term use, the spring inevitably deforms, reducing its ability to assist the valve stem in returning to its original position, affecting valve closing speed. In severe cases, this can even cause the flush valve to leak, significantly impacting its proper operation and reliability. Utility Model Content

[0003] The main purpose of the utility model is to provide a self-locking flush valve, aiming to solve the above-mentioned technical problems in the background technology.

[0004] To achieve the above-mentioned objectives, the utility model provides a self-locking flush valve, comprising a valve body, a valve core, a pressure cover, a pressure spring, a drum-type compression spring and a bottom cover; a water inlet and a water outlet are provided on the valve body, and a water outlet connecting the water inlet and the water outlet is provided inside the valve body; the valve core comprises a valve stem and a valve head connected to the valve stem, the valve head is sealed with the water outlet, and the valve stem is connected to the pressure cover after passing through the valve body; the pressure spring is installed in a first space formed by the upper end of the valve body and the pressure cover, and the pressure spring is sleeved on the valve stem; the bottom cover is installed at the lower end of the valve body; the drum-type compression spring is installed in a second space formed by the bottom cover and the lower end of the valve body, and the drum-type compression spring abuts against the valve head.

[0005] Preferably, a screw mounting hole is provided at one end of the valve stem close to the gland, and a locking screw is installed in the screw mounting hole.

[0006] Preferably, a through hole is provided on the gland at a position corresponding to the screw mounting hole.

[0007] Preferably, the water inlet of the valve body is provided with a first baffle wall, the water outlet of the valve body is provided with a second baffle wall, and the water outlet is provided between the first baffle wall and the second baffle wall.

[0008] Preferably, a passage hole adapted to the valve stem is provided in the valve body, and a first sealing ring is installed at the bottom of the passage hole.

[0009] Preferably, the valve head is a T-shaped valve head.

[0010] Preferably, the upper end of the valve head is provided with a mounting groove, and a second sealing ring is mounted in the mounting groove.

[0011] Preferably, the drum-shaped compression spring has 6 turns, an outer diameter of 23 mm, an inner diameter of 13 mm, a total height of 23 mm, and a wire diameter of 1.0 mm.

[0012] Preferably, the water inlet and the water outlet of the valve body are respectively connected with a nipple.

[0013] Preferably, the nipple comprises a nut, an O-shaped sealing gasket, and a male joint; the male joint is sleeved in the nut, the O-shaped sealing gasket is mounted on the surface of the male joint, and the end of the nut away from the male joint is connected with the water inlet or the water outlet through threads.

[0014] The self-locking flush valve has the following beneficial effects:

[0015] (1) The self-locking flush valve improves the valve core return ability and the valve closing efficiency by using the drum-shaped compression spring and the pressing spring in cooperation.

[0016] (2) The self-locking flush valve plays an auxiliary valve closing role by additionally arranging the drum-shaped compression spring. When the pressing cover is pressed, the drum-shaped compression spring shares the force, thereby reducing the stress of the upper pressing spring, correspondingly reducing the friction and torsion between the pressing spring and the pressing cover, effectively preventing the pressing spring from deforming due to excessive stress, improving the reliability of the self-locking flush valve, and prolonging the service life of the product. BRIEF DESCRIPTION OF DRAWINGS

[0017] In order to more clearly illustrate the technical scheme of the embodiments of the present application, the following will briefly introduce the drawings needed to be used in the embodiments. It should be understood that the following drawings only show some embodiments of the present application, and therefore should not be regarded as a limitation on the scope. For those skilled in the art, other related drawings can also be obtained without creative labor on the basis of these drawings.

[0018] Figure 1 Fig. 1 is a structural schematic view of a self-locking flush valve according to an embodiment of the present application.

[0019] Fig. 2 is a structural schematic view of a drum-shaped compression spring of the self-locking flush valve according to an embodiment of the present application. Figure 1 Fig. 4 is a structural schematic view of a pressing spring of the self-locking flush valve according to an embodiment of the present application.

[0020]

[0021] ​1. Valve body; 101. Water inlet; 102. Water outlet; 103. Water outlet; 104. First retaining wall; 105. Second retaining wall; 2. Valve core; 201. Valve stem; 202. Valve head; 3. Pressure cover; 301. Perforation; 4. Press spring; 5. Drum-type compression spring; 6. Bottom cover; 7. Locking screw. DETAILED DESCRIPTION

[0022] To better understand the above technical solutions, exemplary embodiments of the present disclosure will be described in more detail below with reference to the accompanying drawings. Although exemplary embodiments of the present disclosure are shown in the accompanying drawings, it should be understood that the present disclosure can be implemented in various forms and should not be limited by the embodiments described herein. Instead, these embodiments are provided to enable a more thorough understanding of the present disclosure and to fully convey the scope of the present disclosure to those skilled in the art.

[0023] It should be understood that the specific embodiments described herein are only used to explain the present invention and are not intended to limit the present invention.

[0024] It should be noted that, in the embodiments of the present invention, the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise", "axial", "radial", "circumferential", etc., indicating the orientation or position relationship, are based on the orientation or position relationship of the coordinate system shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or component referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation to the present invention.

[0025] In this utility model, unless otherwise specified or limited, the terms "installed," "connected," "connect," "fixed," etc. should be understood in a broad sense. For example, they can refer to fixed connection, detachable connection, or integration; they can refer to direct connection or indirect connection through an intermediate medium; they can refer to internal communication between two components or interaction between two components. Those skilled in the art will understand the specific meanings of the above terms in this utility model based on specific circumstances.

[0026] In the present invention, unless otherwise expressly specified or limited, when a first feature is "above" or "below" a second feature, it may mean that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediary. Furthermore, when a first feature is "above," "above," or "above" a second feature, it may mean that the first feature is directly above or diagonally above the second feature, or simply means that the first feature is at a higher level than the second feature. When a first feature is "below," "below," or "below" a second feature, it may mean that the first feature is directly below or diagonally below the second feature, or simply means that the first feature is at a lower level than the second feature.

[0027] The utility model provides a self-locking flushing valve, Figure 1 In one embodiment, the self-locking flush valve includes a valve body 1, a valve core 2, a pressure cover 3, a pressing spring 4, a drum-type compression spring 5 and a bottom cover 6; the valve body 1 is provided with a water inlet 101 and a water outlet 102, and the valve body 1 is provided with a water outlet 103 connecting the water inlet 101 and the water outlet 102; the valve core 2 includes a valve stem 201 and a valve head 202 connected to the valve stem 201, the valve head 202 is sealed with the water outlet 103, and the valve stem 201 is connected to the pressure cover 3 after passing through the valve body 1; the pressing spring 4 is installed in a first space formed by the upper end of the valve body 1 and the pressure cover 3, and the pressing spring 4 is sleeved on the valve stem 201; the bottom cover 6 is installed at the lower end of the valve body 1; the drum-type compression spring 5 is installed in a second space formed by the bottom cover 6 and the lower end of the valve body 1, and the drum-type compression spring 5 abuts against the valve head 202.

[0028] It can be understood that the self-locking flush valve of this embodiment mainly includes a valve body 1, a valve core 2, a pressure cover 3, a pressing spring 4, a drum-type compression spring 5 and a bottom cover 6, wherein a water inlet 101 is provided on one side of the valve body 1, a water outlet 102 is provided on the other side of the valve body 1, and a water outlet 103 is provided inside the valve body 1 for connecting the water inlet 101 and the water outlet 102; the valve core 2 includes a valve stem 201 passing through the upper half of the valve body 1, and a valve head 202 connected to the valve stem 201, the upper end of the valve head 202 is sealed with the water inlet 101, and the lower end of the valve head 202 is sealed with the lower half of the valve body 1 to achieve water flow control; the pressure cover 3 is threadedly connected to the upper end of the valve stem 201, and the pressure cover 3 is connected to the valve body 1 The upper half has a certain spacing distance; the bottom cover 6 is installed at the lower end of the valve body 1; the pressing spring 4 is an ordinary compression spring, which is sleeved on the valve stem 201, and one end of the pressing spring 4 abuts against the pressure cover 3, and the other end of the pressing spring 4 abuts against the upper end of the valve body 1. When the pressure cover 3 is pressed, the pressing spring 4 can perform repeated telescopic movements along the axial direction of the valve stem 201; the drum-type compression spring 5 is installed in the second space formed by the bottom cover 6 and the lower end of the valve body 1, and one end of the drum-type compression spring 5 abuts against the bottom cover 6, and the other end of the drum-type compression spring 5 abuts against the bottom of the valve head 202. After the pressure on the valve core 2 disappears (for example, the flushing operation is over), the drum-type compression spring 5 plays an auxiliary resetting role, so that the valve core 2 quickly returns to its initial position.

[0029] It can be understood that the working process of the self-locking flush valve of this embodiment is as follows:

[0030] First, when flushing is required, press the pressure cover 3, the pressure cover 3 drives the valve core 2 to move downward, and the valve head 202 moves downward with the valve core 2, so that the water outlet 103 is opened, and water flows in from the water inlet 101, passes through the water outlet 103 and flows out from the water outlet 102 to flush the area that needs to be flushed; at the same time that the pressure cover 3 is pressed, under the action of external pressure, the pressing spring 4 begins to compress, and the drum-type compression spring 5 is compressed under the action of the valve core 3.

[0031] After flushing is completed, under the rebound force of the drum-type compression spring 5 and the pressing spring 4, the valve core 2 and the pressure cover 3 are driven to move upward, and the valve head 202 returns to the initial position with the valve core 2 (that is, the valve core 2 returns to its original position), so that the water outlet 103 is closed, achieving the purpose of self-locking.

[0032] In summary, the self-locking flush valve of this embodiment has the following beneficial effects:

[0033] (1) The self-locking flush valve of this embodiment improves the ability of the valve core 2 to return to its original position by using the drum-type compression spring 5 and the pressing spring 4 in combination, thereby improving the valve closing efficiency;

[0034] (2) The self-locking flush valve of this embodiment utilizes a drum-shaped compression spring 5 to assist in closing the valve. When pressing the gland 3, the drum-shaped compression spring 5 shares the force applied, thereby reducing the force applied to the upper compression spring 4 and, accordingly, the friction and torsional forces between the compression spring 4 and the gland 3. This effectively prevents deformation of the compression spring 4 due to excessive force, thereby improving the reliability of the self-locking flush valve and extending its life.

[0035] In a preferred embodiment, reference Figure 1 A screw mounting hole is provided at one end of the valve stem 201 close to the gland 3, and a locking screw 7 is installed in the screw mounting hole.

[0036] Specifically, the self-locking flush valve of this embodiment has a threaded connection portion at the top of the gland 3, and a positioning hole is defined on the outside of the threaded connection portion. When the upper end of the valve stem 201 of the valve core 2 is threadedly connected to the threaded connection portion of the gland 3, the positioning hole in the threaded connection portion corresponds to the screw mounting hole on the valve stem 201. At this point, the threaded connection portion between the upper end of the valve stem 201 and the gland 3 can be locked and reinforced using the locking screw 7.

[0037] Optionally, the distance between the screw mounting hole and the top of the gland 3 is set according to requirements, for example, the distance is 10 to 20 mm; the locking screw 7 is a hexagon socket locking screw.

[0038] Understandably, compared with the existing flush valve, a mounting hole is provided on the top of the upper cover of the flush valve, and a screw for fixing the valve stem is installed in the mounting hole. In this way, when the upper cover is pressed, the valve stem will rotate, and the screw will become loose during long-term use, thereby causing the upper cover to fall off and the upper spring to pop out, and even causing the flush valve to malfunction. In the self-locking flush valve of this embodiment, after the upper end of the valve stem 201 is threadedly connected to the top of the pressure cover 3, it is locked and reinforced by the locking screw 7, which can effectively prevent the locking screw 7 from falling off as the valve stem 201 rotates, thereby improving the reliability of the flush valve.

[0039] In a preferred embodiment, reference Figure 1 A through hole 301 is provided on the gland 3 at a position corresponding to the screw mounting hole.

[0040] Specifically, the gland 3 has a through-hole 301 sized to fit the locking screw 7, and the through-hole 301 is positioned directly opposite the screw mounting hole. This through-hole 301 allows the locking screw 7 to be locked into the screw mounting hole on the valve stem 201, making installation of the locking screw 7 easier.

[0041] In a preferred embodiment, reference Figure 1The water inlet 101 of the valve body 1 is provided with a first baffle wall 104 , the water outlet 102 of the valve body 1 is provided with a second baffle wall 105 , and the water outlet 103 is provided between the first baffle wall 104 and the second baffle wall 105 .

[0042] Specifically, an "L"-shaped first retaining wall 104 is provided at the water inlet 101 of the valve body 1, and a "7"-shaped second retaining wall 105 is provided at the water outlet 102 of the valve body 1. The lower end of the first retaining wall 104 and the upper end of the second retaining wall 105 are coplanar, and a water passage 103 is formed between the lower end of the first retaining wall 104 and the upper end of the second retaining wall 105 for connecting the water inlet 101 and the water outlet 102. It can be understood that the self-locking flush valve of this embodiment, by providing the first retaining wall 104 and the second retaining wall 105, can reduce the amount of water passing through the valve body 1 by half, thereby achieving the purpose of water conservation.

[0043] In a preferred embodiment, a passage hole adapted to the valve stem 201 is provided in the valve body 1 , and a first sealing ring is installed at the bottom of the passage hole.

[0044] Specifically, the self-locking flush valve of this embodiment has a valve stem 201 that passes through the upper part of the valve body 1 and is threadedly connected to the pressure cover 3. Accordingly, the upper part of the valve body 1 is provided with an aisle hole that is adapted to the valve stem 201, and a first sealing ring is installed at the bottom of the aisle hole. At this time, by providing the first sealing ring, the valve stem 201 and the upper inner wall of the valve body 1 can form a good seal to prevent water from flowing out through the aisle hole on the valve body 1.

[0045] In a preferred embodiment, the valve head 202 includes an upper stopper, an intermediate connecting body, and a lower stopper that are connected in sequence.

[0046] Specifically, the valve head 202 of this embodiment includes an upper stopper, an intermediate connector, and a lower stopper, and the cross-section of the valve head 202 is I-shaped. The upper stopper is located at the top of the valve head 202 and is connected to the first and second retaining walls 104 and 105 to seal the water outlet 103. The intermediate connector is used to connect the upper and lower stoppers, and the length of the intermediate connector (i.e., the distance between the upper and lower stoppers) is less than that of the first retaining wall 104. The lower stopper is located at the bottom of the valve head 202 and seals against the lower inner wall of the valve body 1. It is understood that the provision of the valve head 202 with an I-shaped cross-section in this embodiment can achieve the purpose of sealing the water outlet 103 and precisely controlling the direction of water flow.

[0047] Optionally, sealing rings are installed on both the upper stopper and the lower stopper, and the cross section of the lower stopper is in an inverted trapezoidal shape.

[0048] In a preferred embodiment, a mounting groove is provided at the upper end of the valve head 202, and a second sealing ring is installed in the mounting groove.

[0049] Specifically, the self-locking flush valve of this embodiment is equipped with a second sealing ring at the upper end of the valve head 202 corresponding to the water outlet 103. At this time, when the self-locking flush valve is in the closed state, the second sealing ring can form a good seal between the valve head 202 and the water outlet 103, preventing water from leaking from the connection between the valve head 202 and the water outlet 103, thereby effectively ensuring the closing reliability of the self-locking flush valve.

[0050] Furthermore, when the self-locking flush valve is in the closed state, a third sealing ring is installed at the lower end of the valve head 202 corresponding to the connection between the water inlet and outlet 102 and the valve body 1. At this time, the third sealing ring can form a good seal between the valve head 202 and the lower inner wall of the valve body 1, preventing water from flowing into the second space for installing the drum-type compression spring 5, thereby ensuring the normal operation of the self-locking flush valve.

[0051] In a preferred embodiment, referring to FIG2 , the drum-type compression spring 5 has 6 turns, an outer diameter of the spring of 23 mm, an inner diameter of the spring of 13 mm, a total height of 23 mm, and a spring wire diameter of 1.0 mm.

[0052] Specifically, in the self-locking flush valve of this embodiment, a drum-type compression spring 5 is installed in the second space formed by the bottom cover 6 and the lower end of the valve body 1. The two ends of the drum-type compression spring 5 are respectively in contact with the bottom cover 6 and the valve head 202. The drum-type compression spring 5 is made of stainless steel, has 6 turns, and the turns at both ends of the drum-type compression spring 5 are half turns. The spring outer diameter D1 is 23 mm, the spring inner diameter D2 is 13 mm, the total height H is 23 mm, and the spring wire diameter (i.e., the wire diameter) d is 1.0 mm. It can be understood that by setting the drum-type compression spring 5 with the above parameters, the control position occupied in the bottom cover 6 after the spring is compressed can be significantly reduced, thereby making the structure of the self-locking flush valve more compact and conducive to product miniaturization.

[0053] In a preferred embodiment, the water inlet 101 and the water outlet 102 of the valve body 1 are respectively connected to a union.

[0054] In this embodiment, the water inlet 101 and the water outlet 102 of the valve body 1 are respectively connected to the water pipe through a union, so that the self-locking flush valve is connected to the water pipe, which improves the installation convenience.

[0055] In a preferred embodiment, the union includes a nut, an O-ring gasket and a male joint; the male joint is sleeved in the nut, the O-ring gasket is installed on the surface of the male joint, and the end of the nut away from the male joint is connected to the water inlet 101 or the water outlet 102 through a thread.

[0056] In this embodiment, the union mainly includes a nut, an O-ring gasket, and a male connector for connecting to a water pipe. The nut is internally threaded, a first end of the nut is provided with an annular baffle, and the second end of the nut is threadedly connected to the water inlet 101 or the water outlet 102. The male connector is sleeved within the nut and restrained by the annular baffle. The O-ring gasket is installed in a mounting groove provided on the surface of the male connector, effectively preventing water from seeping or overflowing from the connection between the water pipe and the self-locking flush valve, thereby ensuring the sealing of the entire connection. It can be understood that this embodiment, by providing a union including a nut, an O-ring gasket, and a male connector, can achieve a sealed connection between the self-locking flush valve and the water pipe, and facilitates quick installation or removal.

[0057] The above are only preferred embodiments of the present invention and are not intended to limit the patent scope of the present invention. Any equivalent structure or equivalent process transformation made using the contents of the present invention specification and drawings, or directly or indirectly applied in other related technical fields, are also included in the patent protection scope of the present invention.

Claims

1. A self-locking flush valve, characterized in that: The invention comprises a valve body (1), a valve core (2), a pressure cover (3), a pressing spring (4), a drum-type compression spring (5) and a bottom cover (6); the valve body (1) is provided with a water inlet (101) and a water outlet (102); the valve body (1) is provided with a water outlet (103) communicating with the water inlet (101) and the water outlet (102); the valve core (2) comprises a valve stem (201) and a valve head (202) connected to the valve stem (201); the valve head (202) is sealed with the water outlet (103) The valve stem (201) passes through the valve body (1) and is connected to the pressure cover (3); the pressing spring (4) is installed in a first space formed by the upper end of the valve body (1) and the pressure cover (3), and the pressing spring (4) is sleeved on the valve stem (201); the bottom cover (6) is installed at the lower end of the valve body (1); the drum-type compression spring (5) is installed in a second space formed by the bottom cover (6) and the lower end of the valve body (1), and the drum-type compression spring (5) is in contact with the valve head (202).

2. The self-locking flush valve according to claim 1, wherein: A screw mounting hole is provided at one end of the valve stem (201) close to the gland (3), and a locking screw (7) is installed in the screw mounting hole.

3. The self-locking flush valve according to claim 2, wherein: A through hole (301) is provided on the pressure cover (3) at a position corresponding to the screw mounting hole.

4. The self-locking flush valve according to claim 1, wherein: The water inlet (101) of the valve body (1) is provided with a first baffle wall (104), the water outlet (102) of the valve body (1) is provided with a second baffle wall (105), and the water outlet (103) is provided between the first baffle wall (104) and the second baffle wall (105).

5. The self-locking flush valve according to claim 1 or 4, characterized in that: A passage hole adapted to the valve stem (201) is provided in the valve body (1), and a first sealing ring is installed at the bottom of the passage hole.

6. The self-locking flush valve according to claim 1, wherein: The valve head (202) comprises an upper stopper, an intermediate connecting body and a lower stopper which are connected in sequence.

7. The self-locking flush valve according to claim 1 or 6, characterized in that: The upper end of the valve head (202) is provided with a mounting groove, and a second sealing ring is installed in the mounting groove.

8. The self-locking flush valve according to claim 1, wherein: The drum-type compression spring (5) has 6 turns, an outer diameter of 23 mm, an inner diameter of 13 mm, a total height of 23 mm, and a spring wire diameter of 1.0 mm.

9. The self-locking flush valve according to claim 1, wherein: The water inlet (101) and the water outlet (102) of the valve body (1) are respectively connected to a union.

10. The self-locking flush valve according to claim 9, wherein: The union comprises a nut, an O-shaped sealing gasket and a male joint; the male joint is sleeved in the nut, the O-shaped sealing gasket is mounted on the surface of the male joint, and the end of the nut away from the male joint is connected to the water inlet (101) or the water outlet (102) through a thread.

Images