A high-temperature globe valve

Abstract

The present invention discloses a high-temperature stop valve, which includes a valve body, a plugging valve core, a support spring and a shape memory alloy spring. The valve body is provided with a water outlet, a water inlet and a valve cavity, and the water inlet, the valve cavity and the water outlet are communicated in sequence. Among them, the plugging valve core includes a main body frame, a plug head arranged on the main body frame and a driving plate. The plug head is arranged corresponding to the water outlet, and the driving plate is clamped between the support spring and the shape memory alloy spring. A notch is provided on the side wall of the plug head to form a pressure relief channel for pressure relief after the side wall of the plug head contacts and seals with the inner wall of the water outlet. One end of the plug head is provided with a flow stabilizing portion for restricting the shaking of the plug head, and the flow stabilizing portion is located in the water outlet. By adopting the present invention, the structure is simple, the valve core is stable, the reaction speed of intercepting high-temperature water flow is fast, and the internal pressure of the valve body can be prevented from being too high.

Description

[0001] This application is a divisional application of the application with the application number 202210378595.9. The filing date of the parent case is: April 8, 2022; the name of the invention creation is: A high-temperature stop valve. Technical Field

[0002] The present invention relates to the technical field of bathroom water valves, and particularly to a high-temperature stop valve. Background Art

[0003] Currently, for the terminal water outlet of shower products, such as rain shower heads, handheld shower heads, elderly-friendly products, and anti-scalding in other high-temperature scenarios, the water temperature is adjusted by manually adjusting the flow rate to achieve water temperature adjustment, and personal feeling is relied on to judge the comfort of the water temperature; or a constant-temperature valve core is used to set the temperature to achieve anti-scalding during showering. However, when the valve core fails, the cold water end is blocked, or the cold water supply is cut off, then all the hot water output during the showering process is high-temperature hot water, which is likely to cause accidental scalding to people, especially for the elderly and children.

[0004] Moreover, for existing similar high-temperature stop valves, when the temperature is too high and the water flow is cut off, the ambient temperature and air pressure in the faucet cavity will increase significantly, which may cause damage to the control valve. Moreover, the existing devices for sensing high temperature generally use paraffin temperature bulbs, which have low sensitivity, cannot achieve rapid cut-off of high temperature, and are matched with ordinary household water heaters and installed at the front end of the product, resulting in poor applicability of the product. Summary of the Invention

[0005] The technical problem to be solved by the present invention is to provide a high-temperature stop valve with a simple structure, a stable valve core, a fast reaction speed for cutting off high-temperature water flow, and the ability to avoid excessive pressure inside the valve body.

[0006] To solve the above technical problem, the present invention provides a high-temperature stop valve, which includes a valve body, a plugging valve core, a support spring, and a shape memory alloy spring arranged in the valve body. The valve body is provided with a water outlet, a water inlet, and a valve cavity for the plugging valve core to move. The water inlet, the valve cavity, and the water outlet are connected in sequence. The shape memory alloy spring is heated to drive the plugging valve core to press against the support spring, so that the plugging valve core moves towards the water outlet;

[0007] Wherein, the plugging valve core includes a main body frame, a plug head arranged on the main body frame, and a driving plate. The plug head is arranged corresponding to the water outlet, and the driving plate is clamped between the support spring and the shape memory alloy spring;

[0008] A notch is provided on the side wall of the plug head to form a pressure relief channel for pressure relief after the side wall of the plug head contacts and seals with the inner wall of the water outlet;

[0009] One end of the plug is provided with a flow stabilizing portion for restricting the sway of the plug, and the flow stabilizing portion is located inside the water outlet.

[0010] As an improvement of the above solution, the flow stabilizing portion includes a plurality of water outlet guide plates, and the plate surface of the water outlet guide plate is parallel to the axis of the water outlet.

[0011] As an improvement of the above solution, the main body is provided with a plurality of in-cavity guide plates, and the plate surface of the in-cavity guide plate is parallel to the axis of the water outlet.

[0012] As an improvement of the above solution, the side wall of the plug includes an inlet surface and a contact surface, the contact surface is inclined relative to the axial direction of the water outlet, and the inner wall of the water outlet is provided with an inclined surface corresponding to the contact surface.

[0013] As an improvement of the above solution, the inlet surface and the contact surface are both provided with the notches, so that after the contact surface and the inclined surface are in contact, the notch at the inlet surface forms a pressure relief port communicating with the valve cavity, the notch at the contact surface forms the pressure relief channel, and the pressure relief port and the pressure relief channel communicate with each other.

[0014] As an improvement of the above solution, the side wall of the plug further includes an outlet surface for guiding the pressure relief direction, the outlet surface and the inner wall of the water outlet form a diversion channel, and the distance between the outlet surface and the inner wall of the water outlet is less than 3 mm.

[0015] As an improvement of the above solution, the valve body includes a shell and a detachable bottom cover, and the bottom of the shell is provided with a mounting opening adapted to the bottom cover for the bottom cover to be embedded.

[0016] As an improvement of the above solution, the bottom cover is provided with a mounting post for mounting the shape memory alloy spring, and the shape memory alloy spring is sleeved on the mounting post.

[0017] As an improvement of the above solution, the mounting post is provided with a water inlet channel communicating with the water inlet, and the driving plate is provided with a guiding portion for guiding the movement of the main body frame, and the guiding portion is inserted into the water inlet channel to move along the water inlet channel.

[0018] As an improvement of the above solution, the aperture of the pressure relief channel is less than 3 mm.

[0019] Implementing the present invention has the following beneficial effects:

[0020] The present invention discloses a high-temperature stop valve, which includes a valve body, a plugging valve core, a support spring, and a shape memory alloy spring disposed in the valve body. The valve body is provided with a water outlet, a water inlet, and a valve cavity. The plugging valve core includes a main body frame, a plug provided on the main body frame, and a driving plate. The driving plate is clamped between the support spring and the shape memory alloy spring. Therefore, when the shape memory alloy spring overheats, it will quickly expand and drive the plugging valve core to press against the support spring, so that the plug blocks the water outlet.

[0021] Moreover, a notch is provided on the side wall of the plug to form a pressure relief channel for pressure relief after the side wall of the plug contacts and seals with the inner wall of the water outlet, so as to avoid damage to the inside of the valve body due to excessive internal pressure by discharging a small amount of water and gas.

[0022] At the same time, a flow stabilizing portion is provided at one end of the plug to reduce the shaking of the plug during daily work. BRIEF DESCRIPTION OF THE DRAWINGS

[0023] Figure 1 is a three-dimensional schematic diagram of the high-temperature stop valve of the present invention;

[0024] Figure 2 is an exploded structural schematic diagram of the high-temperature stop valve of the present invention;

[0025] Figure 3 is a cross-sectional structural schematic diagram of the high-temperature stop valve of the present invention. DETAILED DESCRIPTION OF THE INVENTION

[0026] To make the objectives, technical solutions, and advantages of the present invention clearer, the present invention will be further described in detail below with reference to the accompanying drawings.

[0027] See Figure 1 、 2 and 3, the present invention provides a high-temperature stop valve, which includes a valve body 1, a plugging valve core 2, a support spring 3, and a shape memory alloy spring 4 disposed in the valve body 1. The valve body 1 is provided with a water outlet 1a, a water inlet 1b, and a valve cavity 1c for the plugging valve core to move. The water inlet 1b, the valve cavity 1c, and the water outlet 1a are connected in sequence. The shape memory alloy spring 4 is deformed by heat to drive the plugging valve core 2 to press against the support spring 3, so that the plugging valve core 2 moves towards the water outlet 1a;

[0028] Among them, the plugging valve core 2 includes a main body frame 21, a plug 22 provided on the main body frame, and a driving plate 23. The plug 22 is disposed corresponding to the water outlet 1a. The driving plate 23 is clamped between the support spring 3 and the shape memory alloy spring 4. Therefore, when the water temperature is too high, the shape memory alloy spring 4 will quickly recover and expand to push the driving plate 23, and then compress the support spring 3 until the water outlet 1a is blocked by the plug 22.

[0029] The side wall of the plug 22 is provided with a notch 221 to form a pressure relief channel 5 for pressure relief after the side wall of the plug contacts and seals with the inner wall of the water outlet 1a;

[0030] One end of the plug 22 is provided with a flow stabilizing portion for restricting the shaking of the plug 22, and the flow stabilizing portion is located within the water outlet 1b.

[0031] Specifically, for the convenience of assembling and maintaining the present invention, the valve body 1 includes a housing 11 and a detachable bottom cover 12. The bottom of the housing 11 is provided with an installation opening 111 adapted to the bottom cover 12 for the bottom cover 12 to be embedded. The water inlet 1b is provided on the bottom cover 12. The housing 11 and the bottom cover 12 are closed to form the valve cavity 1c. Therefore, when it is necessary to install the control component and the plugging valve core 2, only need to open the bottom cover 12, and the corresponding plugging valve core 2 and the control component can be installed into the valve cavity 1c. Similarly, when maintenance and repair are required, just open the bottom cover 12.

[0032] In order to stabilize the working position of the shape memory alloy spring 4 and restrict its movement due to the influence of water flow, the bottom cover 12 is provided with an installation post 121 for installing the shape memory alloy spring 4, and the shape memory alloy spring 4 is sleeved on the installation post 121.

[0033] Moreover, in order to stabilize the movement track of the plugging valve core 2 to ensure that the plug 22 and the water outlet 1a can achieve the plugging function, the installation post 121 is provided with a water inlet channel 122 communicating with the water inlet 1b. The driving plate 23 is provided with a guiding portion 231 for guiding the movement of the main body frame 21, and the guiding portion 231 is inserted into the water inlet channel 122 to move along the water inlet channel 122. The shape of the guiding portion 231 is preferably a columnar body with a cross-section in the shape of a cross to ensure the fluidity of the water inlet channel 122 after the guiding portion 231 is inserted into the water inlet channel 122. Correspondingly, the guiding portion 231 can also be a columnar body with other cross-sections, such as star-shaped, triangular, elliptical, diamond-shaped, etc., as long as there is a certain space between the guiding portion 231 and the inner wall of the water inlet channel 122.

[0034] In order to reduce the blocking effect of the driving plate 23 on the water flow, a plurality of flow holes 232 for the water flow to pass through are provided on the driving plate 23. At the same time, in order to improve the induction speed of the shape memory alloy spring 4 to achieve high-temperature protection in a timely manner, the flow holes 232 are arranged opposite to the shape memory alloy spring 4 so that the water flow can flow through the shape memory alloy spring 4 as much as possible.

[0035] It should be noted that the support spring 3 is a common spring made of ferroalloy material, such as a stainless steel spring, and the shape memory alloy spring 4 is made of shape memory alloy, such as nickel-titanium alloy. That is, when the temperature of the shape memory alloy spring rises to a preset value, it will return to the preset shape, such as the shape after the spring is stretched, so as to have the power to drive the plug valve core. Moreover, the shape of the spring is set to have a large contact area with water and fast heating.

[0036] Since the plug valve core relies on the support of the shape memory alloy spring 4 and the support spring 3, the plug valve core 2 is relatively vulnerable to the influence of water flow and shakes from side to side. Therefore, in order to stabilize the working state of the plug valve core 2, the flow stabilizing part includes a plurality of water outlet guide plates 24, and the plate surface of the water outlet guide plate is parallel to the axis of the water outlet. Moreover, the main body frame 21 is provided with a plurality of cavity guide plates 211, and the plate surface of the cavity guide plate 211 is parallel to the axis of the water outlet 1a. Through the arrangement of the water outlet guide plates 24 and the cavity guide plates 211, the amplitude of the shaking of the plug valve core can be greatly reduced. Preferably, the flow through hole 232 is relatively located between two cavity guide plates 211 to further improve the stability of the plug valve core.

[0037] The side wall of the plug 22 includes an inlet surface 22a and a contact surface 22b. The contact surface 22b is inclined relative to the axial direction of the water outlet 1a. The inner wall of the water outlet 1a is provided with an inclined surface 1d corresponding to the contact surface 22b. When the contact surface contacts the inclined surface 1d of the water outlet 1a, the connection between the water outlet 1a and the valve cavity 1c is blocked, restricting the direct outflow of high-temperature water flow from the water outlet 1a.

[0038] Correspondingly, the inlet surface 22a and the contact surface 22b are both provided with the notches. After the contact surface 22b contacts the inclined surface 1d, the notch at the inlet surface 22a forms a pressure relief port 6 communicating with the valve cavity, and the notch at the contact surface forms the pressure relief channel 5, and the pressure relief port 6 and the pressure relief channel 5 are communicated. With such an arrangement, the opening direction of the pressure relief port 6 is relatively located at the side of the plug 22, avoiding directly corresponding to the water inflow direction of the water inlet 1b, so as to solve the problem that the water flow can directly rush into the pressure relief port 6 through the initial flow rate.

[0039] It should be noted that compared with the water pressure of tap water, the water outlet pressure of general household hot water is low, and the aperture of the pressure relief channel 5 is small. Therefore, when cold water is missing, the low-pressure hot water flow will not immediately flow out from the pressure relief channel 5 until the water pressure exceeds the preset value, thus giving the user time to react. Moreover, when cold water is missing, a cavity will be formed in the cold water pipe section. Therefore, without the pressure relief effect of the pressure relief channel 5, it is easy to quickly increase the air pressure under the influence of the hot water flow, thus causing other safety problems. Preferably, the aperture of the pressure relief channel 5 is less than 3 mm.

[0040] Since there will be no water output when cold water is missing and the hot water cut-off is triggered, there will be random behavior of some users disassembling the product equipped with this product. In particular, the handheld shower head that is easily disassembled by ordinary users. Therefore, in order to prevent the hot water flow from directly spraying outwards along the axial direction of the water outlet 1a at the pressure relief passage 5 and accidentally scalding the user. The inclined setting of the pressure relief passage 5 can make the hot water flow ejected from the pressure relief passage 5 rush towards the flow stabilizing portion to buffer the ejection speed of the hot water flow.

[0041] On the other hand, the side wall of the plug 22 may further include an outlet surface 22c for guiding the pressure relief direction. The outlet surface 22c and the inner wall of the water outlet 1a form a diversion channel 7. The distance between the outlet surface and the inner wall of the water outlet is less than 3 mm, so that the hot water flow can be diverted to the inner wall of the water outlet to avoid spraying.

[0042] The above is the preferred embodiment 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 can be made, and these improvements and refinements are also regarded as the protection scope of the present invention.

Claims

1. A high-temperature stop valve, characterized in that, It includes a valve body, a plugging valve core arranged in the valve body, a support spring and a shape memory alloy spring. The valve body is provided with a water outlet, a water inlet and a valve cavity for the plugging valve core to move. The water inlet, the valve cavity and the water outlet are communicated in sequence. The shape memory alloy spring is heated to drive the plugging valve core to press against the support spring, so that the plugging valve core moves towards the water outlet; Wherein, the plugging valve core includes a main body frame, a plug and a driving plate arranged on the main body frame. The plug is arranged corresponding to the water outlet. The driving plate is clamped between the support spring and the shape memory alloy spring. The driving plate is provided with a plurality of flow holes for water flow to pass through, and the flow holes are arranged corresponding to the shape memory alloy spring; A notch is arranged on the side wall of the plug to form a pressure relief channel for pressure relief after the side wall of the plug contacts and seals with the inner wall of the water outlet; One end of the plug is provided with a flow stabilizing part for restricting the shaking of the plug, and the flow stabilizing part is located in the water outlet; The side wall of the plug further includes an outlet surface for guiding the pressure relief direction, and the outlet surface and the inner wall of the water outlet form a diversion channel; The side wall of the plug includes an inlet surface and a contact surface. The contact surface is inclined relative to the axial direction of the water outlet, and the inner wall of the water outlet is provided with an inclined surface corresponding to the contact surface.

2. The high-temperature cut-off valve according to claim 1, characterized in that, Both the inlet surface and the contact surface are provided with the notch. After the contact surface and the inclined surface contact, the notch at the inlet surface forms a pressure relief port communicated with the valve cavity, and the notch at the contact surface forms the pressure relief channel. The pressure relief port and the pressure relief channel are communicated; 3. The high-temperature cut-off valve according to claim 2, characterized in that, The flow stabilizing part includes a plurality of water outlet diversion plates, and the plate surface of the water outlet diversion plate is parallel to the axis of the water outlet; 4. The high-temperature cut-off valve according to any one of claims 1 to 3, characterized in that, The main body frame is provided with a plurality of in-cavity diversion plates, and the plate surface of the in-cavity diversion plate is parallel to the axis of the water outlet; 5. The high-temperature cut-off valve according to claim 2, wherein, The distance between the outlet surface and the inner wall of the water outlet is less than 3 mm; 6. The high-temperature cut-off valve according to claim 2, characterized in that, The valve body includes a shell and a detachable bottom cover. The bottom of the shell is provided with an installation port adapted to the bottom cover for the bottom cover to be embedded; 7. The high-temperature cut-off valve according to claim 6, characterized in that, The bottom cover is provided with an installation post for installing the shape memory alloy spring, and the shape memory alloy spring is sleeved on the installation post; 8. The high-temperature cut-off valve according to claim 7, characterized in that, An inlet channel communicated with the water inlet is arranged in the installation post. The driving plate is provided with a guiding part for guiding the movement of the main body frame, and the guiding part is inserted into the inlet channel to move along the inlet channel; 9. The high-temperature cut-off valve according to claim 8, characterized in that The shape of the guiding part is a columnar body with a cross section in the shape of a cross, a star, a triangle, an ellipse or a rhombus; 10. The high-temperature cut-off valve according to claim 2, wherein The valve body includes a shell and a detachable bottom cover. The water inlet is arranged on the bottom cover, and the shell and the bottom cover are closed to form the valve cavity; 11. The high-temperature cut-off valve according to claim 1, characterized in that, The aperture of the pressure relief channel is less than 3 mm.

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