Valve element with water return stopping function

Abstract

The valve element comprises a valve body and a valve rod, the valve body is of a hollow structure, the valve rod is rotatably connected to the interior of the valve body, a water inlet hole is formed in the bottom of the valve body, a control piece is fixedly connected to the water inlet hole, a control hole is formed in the center of the control piece, a water stop column is arranged in the control hole in a sleeved mode, and the water stop column is fixedly connected to the valve body. The water stop column comprises a water stop main body, a limiting block and an elastic water stop piece, the water stop main body is sleeved with the control hole, and the limiting block and the elastic water stop piece are fixedly connected to the two sides of the water stop main body; a plurality of water permeable holes are formed in the control piece, the water permeable holes are distributed in the circumference of the control piece, and the orthographic projection of the elastic water stop piece covers all the water permeable holes; the length of the water stop body is larger than the thickness of the control piece. The diameter of the limiting block is larger than that of the water stop body. The return stopping effect is reliable, quick return stopping can be achieved, water flow backflow pollution is avoided, the return stopping mechanism and the valve element body are integrally designed, the structure is compact, and the sealing performance is good.

Description

Technical Field

[0001] This invention relates to the field of bathroom equipment, and more specifically to a valve core with a backflow prevention function. Background Technology

[0002] The valve core is the core component of water supply and drainage appliances, used to control the on / off state of water flow and regulate flow rate. Currently, most valve cores on the market only have basic on / off functions. In actual use, when the water supply system pressure fluctuates or the water supply is interrupted, the water flow in the pipe is prone to backflow, which may not only cause water pollution, but also create negative pressure in the pipe, affecting the stability of subsequent water supply. Some existing valve cores with anti-backflow function typically achieve this by adding an additional check valve. This results in a complex valve core structure, increased size, and greater assembly difficulty. Furthermore, the check mechanism requires high precision in its fit with the valve core body, making it prone to sealing failure and decreased anti-backflow effectiveness after prolonged use. In addition, traditional valve cores lack flexibility in flow regulation, and their limit structure design is flawed, easily leading to adjustment jams or inaccurate positioning, negatively impacting the user experience. Therefore, developing a valve core with anti-backflow function that is compact in structure, reliable in anti-backflow effect, and easy to adjust has become a technical problem that urgently needs to be solved in this field. Summary of the Invention

[0003] The purpose of this invention is to provide a valve core with anti-backflow function in order to solve the above-mentioned problems.

[0004] To achieve the above objectives, the present invention provides the following technical solution: A valve core with anti-backflow function includes a valve body and a valve stem. The valve body has a hollow structure. The valve stem is rotatably connected inside the valve body. A water inlet is provided at the bottom of the valve body. A control plate is fixedly connected to the water inlet. A control hole is provided at the center of the control plate. A water-stop column is sleeved in the control hole. The water-stop column includes a water-stop body, a limiting block, and an elastic water-stop plate. The water-stop body is sleeved in the control hole. The limiting block and the elastic water-stop plate are fixedly connected to both sides of the water-stop body. The control plate has several water-permeable holes distributed on the circumference of the control holes, and the orthographic projection of the elastic water-stop plate covers all the water-permeable holes. The length of the water-stopping body is greater than the thickness of the control sheet, and the diameter of the limiting block is greater than the diameter of the water-stopping body.

[0005] Furthermore, the valve body has several water outlet holes on its side wall; a rotating core is fixedly connected to the bottom of the valve stem, the rotating core is a columnar structure, and a water passage groove is formed on the rotating core in the longitudinal direction, the horizontal height of the water passage groove is consistent with the horizontal height of the water outlet hole; A core is fixedly connected to the bottom inner side of the valve body. The core is a columnar structure and has several water passage holes. The number of water passage grooves is consistent with the number of water passage holes. After the water passage grooves are rotated to face the water passage holes, the water flows in from the inlet hole, through the water passage holes and water passage grooves, and then out from the outlet hole.

[0006] Furthermore, a sliding hole is provided on the side of the valve stem, and a limiting post is slidably connected in the sliding hole. A spring is sleeved on the outer periphery of the limiting post, and the tail end of the spring abuts against the bottom surface of the sliding hole. Several limiting grooves are provided on the inner wall of the valve body. The number of limiting grooves is the same as the number of water passage holes. Each limiting groove corresponds to a water passage hole and is located directly above the water passage hole. The limiting post and the limiting groove cooperate with each other.

[0007] Furthermore, the limiting post includes a limiting part and a fixing part. The limiting part is conical on the side near the limiting groove. The fixing part is fixedly connected to the tail end of the limiting part. The diameter of the fixing part is smaller than the diameter of the tail end face of the limiting part. After the spring is sleeved on the fixing part, the top end of the spring abuts against the tail end face of the limiting part.

[0008] Furthermore, a connection hole is provided at the upper part of the valve stem.

[0009] Furthermore, the valve stem has several weight-reducing grooves on its side.

[0010] Furthermore, there are two water outlets, which are symmetrically distributed on the side wall of the valve body.

[0011] The beneficial effects are: The anti-backflow effect of this invention is reliable: by setting a water-stop column and an elastic water-stop plate at the water inlet, during normal water supply, the water flow pushes the elastic water-stop plate away from the control plate, and the water flow enters the valve core through the water permeable hole; when backflow occurs, the elastic water-stop plate tightly adheres to the control plate under the action of water flow pressure, covering all water permeable holes, realizing rapid anti-backflow, avoiding water backflow and pollution, and the anti-backflow mechanism is integrated with the valve core body, with a compact structure and good sealing performance.

[0012] The valve stem of this invention is provided with a limiting post, a spring, and a limiting groove on the valve body. When the valve stem is rotated, the limiting post is engaged in the corresponding limiting groove under the action of the spring, so as to achieve precise limiting and ensure that the water passage groove and the water passage hole are precisely aligned. At the same time, it provides a clear sense of gear position and improves adjustment accuracy. Attached Figure Description

[0013] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present invention. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0014] Figure 1 This is a schematic diagram of the structure of the present invention; Figure 2 This is a schematic diagram showing the connection between the valve stem and the stator of the present invention; Figure 3 This is a front view structural diagram of the present invention; Figure 4 For the present invention Figure 3 Cross-sectional view at point AA; Figure 5 For the present invention Figure 4 Enlarged view of point B; Figure 6 This is a schematic diagram of the structure of the water-stop column of the present invention; Figure 7 This is a schematic diagram of the limiting post of the present invention.

[0015] The reference numerals in the attached drawings are explained as follows: Valve body 1; Inlet hole 11; Outlet hole 12; Limiting groove 13; Control plate 14; Control hole 141; Water permeable hole 142; Water stop column 15; Water stop body 151; Limiting block 152; Elastic water stop plate 153; Valve stem 2; Sliding hole 21; Limiting column 22; Limiting part 221; Fixing part 222; Spring 23; Weight reduction groove 24; Connecting hole 25; Rotating core 3; Water passage groove 31; Fixed core 4; Water passage hole 41. Detailed Implementation

[0016] To make the objectives, technical solutions, and advantages of this invention clearer, the technical solutions of this invention will be described in detail below. Obviously, the described embodiments are merely some embodiments of this invention, and not all embodiments. Based on the embodiments of this invention, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this invention.

[0017] See Figures 1-7As shown, this invention provides a valve core with anti-backflow function, including a valve body 1 and a valve stem 2. The valve body 1 is a hollow cylindrical structure, and the valve stem 2 is rotatably connected inside the valve body 1. A circular water inlet hole 11 is opened at the center of the bottom of the valve body 1. A control plate 14 is fixedly connected to the water inlet hole 11. The control plate 14 is a circular plate structure with a circular control hole 141 at its center. A water-stop column 15 is sleeved inside the control hole 141. The water-stop column 15 includes a water-stop body 151, a limiting block 152, and an elastic water-stop plate 153. The water-stop body 151 is a cylindrical structure, sleeved inside the control hole 141 and movable along the axial direction of the control hole 141. The limiting block 152 and the elastic water-stop plate 153... The elastic waterstop 153 is made of rubber and has good elasticity and sealing performance. The control plate 14 has 5 water-permeable holes 142, which are evenly distributed on the circumference of the control hole 141. The diameter of the elastic waterstop 153 is larger than the diameter of the control plate 14, and its orthographic projection can completely cover all the water-permeable holes 142 to ensure the sealing effect when preventing backflow. The length of the waterstop body 151 is greater than the thickness of the control plate 14 to ensure that the elastic waterstop 153 can be properly detached from or attached to the control plate. The diameter of the limiting block 152 is larger than the diameter of the waterstop body 151 to prevent the waterstop column 15 from falling out of the control hole 141. The hollow inner cavity of valve body 1 is used to accommodate valve stem 2, rotating core 3, and fixed core 4. The rotating core 3 is a columnar structure and is fixedly connected to the bottom of the valve stem 2. The rotating core 3 has a water passage groove 31 that runs through the rotating core 3 in the longitudinal direction. There are two water passage grooves 31, which are symmetrically distributed on the rotating core 3. The cross-section of the water passage groove 31 is fan-shaped. The horizontal height of the water passage groove 31 is consistent with the horizontal height of the water outlet 12 to ensure that the water flows out without obstruction. The fixed core 4 is a columnar structure and is fixedly connected to the inner bottom of the valve body 1. The fixed core 4 has two water passage holes 41, which are symmetrically distributed on the fixed core 4. The cross-section of the water passage hole 41 is fan-shaped, which is consistent with the shape of the water passage groove 31. The number of water passage grooves 31 is consistent with the number of water passage holes 41. After the water passage groove 31 is rotated to the position directly opposite the water passage hole 41, the water flows in from the water inlet hole 11, flows through the water passage hole 41 and the water passage groove 31, and then flows out from the water outlet hole 12. In order to ensure the sealing, a sealing ring is provided between the rotating core 3, the fixed core 4 and the inner wall of the valve body 1.

[0018] In this embodiment, both the rotating core 3 and the fixed core 4 are made of wear-resistant materials, such as wear-resistant ceramic materials, to improve service life and sealing performance.

[0019] In this embodiment, the upper part of the valve stem 2 is provided with a connecting hole 25 for fixing to the handle by bolts or pins. A sliding hole 21 is provided on the side of the valve stem 2. The sliding hole 21 is cylindrical, and a limiting post 22 is slidably connected within the sliding hole 21. The limiting post 22 includes a limiting part 221 and a fixing part 222. The limiting part 221 is conical on the side near the limiting groove 13. The fixing part 222 is fixedly connected to the tail end of the limiting part 221. The diameter of the fixing part 222 is smaller than the diameter of the tail end face of the limiting part 221. The spring... After the spring 23 is sleeved on the fixing part 222, the top end of the spring 23 abuts against the tail end face of the limiting part 221. The tail end of the spring 23 abuts against the bottom surface of the sliding hole 21. Two limiting grooves 13 are opened on the inner wall of the valve body 1. The number of limiting grooves 13 is the same as the number of water passage holes 41. The limiting groove 13 is a hemispherical groove that matches the conical head of the limiting post 22 to ensure a stable engagement. Each limiting groove 13 corresponds to a water passage hole 41 and is located directly above the water passage hole 41. The limiting post 22 and the limiting groove 13 cooperate with each other.

[0020] In this embodiment, two symmetrically arranged weight-reduction grooves 24 are provided on the side of the valve stem 2 to maximize weight reduction while ensuring structural strength.

[0021] In practical use: During normal water supply, the valve stem 2 is rotated by the handle, and the valve stem 2 drives the rotating core 3 to rotate synchronously. When the water passage groove 31 of the rotating core 3 rotates to the position directly opposite the water passage hole 41 of the fixed core 4, the limiting post 22 is engaged in the corresponding limiting groove 13 under the elastic force of the spring 23, thereby locking the gear position. Water flows in from the water inlet at the bottom of the valve body 1, and the water pressure pushes the elastic water stop plate 153 upward, disengaging it from the control plate. The water flows through the water permeable hole 142 on the control plate 14 into the interior of the valve body 1, and then sequentially passes through the water passage hole 41 of the fixed core 4 and the water passage groove 31 of the rotating core 3. Finally, the water is discharged from the outlet hole 12 on the side wall of the valve body 1, realizing water flow; when the valve stem 2 continues to rotate, the conical head of the limiting column 22 is squeezed by the limiting groove 13, overcomes the elastic force of the spring 23 and retracts into the sliding hole 21, disengaging from the limiting groove 13, and the rotating core 3 continues to rotate until the water passage groove 31 and the water passage hole 41 are completely misaligned, the water flow is blocked, and the water is cut off. When backflow occurs, the backflow water flow exerts downward pressure on the elastic water stop plate 153, causing the elastic water stop plate 153 to tightly fit the control plate 14, covering all the water passage holes 142, preventing the water flow back, and realizing the anti-backflow function.

[0022] The above description is merely a specific embodiment of the present invention, but the scope of protection of the present invention is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in the present invention should be included within the scope of protection of the present invention. Therefore, the scope of protection of the present invention should be determined by the scope of the claims.

Claims

1. A valve core with anti-backflow function, characterized in that: The device includes a valve body and a valve stem. The valve body has a hollow structure, and the valve stem is rotatably connected inside the valve body. A water inlet is provided at the bottom of the valve body, and a control plate is fixedly connected to the water inlet. A control hole is provided at the center of the control plate, and a water-stop column is fitted inside the control hole. The water-stop column includes a water-stop body, a limiting block, and an elastic water-stop plate. The water-stop body is fitted inside the control hole, and the limiting block and the elastic water-stop plate are fixedly connected to both sides of the water-stop body. The control plate has several water-permeable holes distributed on the circumference of the control holes, and the orthographic projection of the elastic water-stop plate covers all the water-permeable holes. The length of the water-stopping body is greater than the thickness of the control sheet, and the diameter of the limiting block is greater than the diameter of the water-stopping body.

2. The valve core with anti-backflow function according to claim 1, characterized in that: The valve body has several water outlet holes on its side wall; the valve stem is fixedly connected to a rotating core, which is a columnar structure, and a water passage groove is formed on the rotating core that runs through the rotating core in the longitudinal direction. The horizontal height of the water passage groove is consistent with the horizontal height of the water outlet hole. A core is fixedly connected to the bottom inner side of the valve body. The core is a columnar structure and has several water passage holes. The number of water passage grooves is consistent with the number of water passage holes. After the water passage grooves are rotated to face the water passage holes, the water flows in from the inlet hole, through the water passage holes and water passage grooves, and then out from the outlet hole.

3. The valve core with anti-backflow function according to claim 1, characterized in that: The valve stem has a sliding hole on its side, and a limiting post is slidably connected inside the sliding hole. A spring is sleeved on the outer periphery of the limiting post, and the tail end of the spring abuts against the bottom surface of the sliding hole. Several limiting grooves are formed on the inner wall of the valve body. The number of limiting grooves is the same as the number of water passage holes. Each limiting groove corresponds to a water passage hole and is located directly above the water passage hole. The limiting post and the limiting groove cooperate with each other.

4. The valve core with anti-backflow function according to claim 3, characterized in that: The limiting post includes a limiting part and a fixing part. The limiting part is conical on the side near the limiting groove. The fixing part is fixedly connected to the tail end of the limiting part. The diameter of the fixing part is smaller than the diameter of the tail end face of the limiting part. After the spring is sleeved on the fixing part, the top end of the spring abuts against the tail end face of the limiting part.

5. The valve core with anti-backflow function according to claim 1, characterized in that: A connection hole is provided at the upper part of the valve stem.

6. The valve core with anti-backflow function according to claim 1, characterized in that: The valve stem has several weight-reducing grooves on its side.

7. The valve core with anti-backflow function according to claim 1, characterized in that: There are two water outlets, which are symmetrically distributed on the side wall of the valve body.

Images