Temperature control valve

Abstract

The utility model provides a temperature control valve, and belongs to the technical field of heating and ventilation. The problem that the temperature rise response speed of a radiator is low is solved. The temperature control valve comprises a valve body and a valve rod, a water passing hole is formed in the valve body, the valve rod penetrates through the valve body in the vertical direction and can move up and down, a sealing head is arranged at the lower end of the valve rod, a sealing face with the diameter gradually increased from bottom to top is arranged on the outer side of the sealing head, and the hole diameter of the water passing hole is between the maximum diameter and the minimum diameter of the sealing face. The sealing head can abut against the interior of the upper end of the water passing hole to form sealing, a concave cavity is formed in the bottom of the sealing head, a water passing opening is formed in the outer side of the part, where the sealing face is located, of the sealing head and communicated with the concave cavity, and the water passing opening is located below the sealing position of the sealing head and the water passing hole when the sealing head abuts against the interior of the upper end of the water passing hole to form sealing. The device has the advantages that flow regulation is more remarkable, and the temperature rise response speed of the radiator is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of heating ventilation and air conditioning, and relates to a temperature control valve. Background Art

[0002] A temperature control valve is a flow regulating valve, which is widely used in heating systems. By adjusting the flow rate of hot water in the heating pipeline, the purpose of adjusting the temperature of the radiator can be achieved. For example, a heating temperature control valve with the patent application number 201621494407.5 includes a valve body and a valve core in the shape of a round rod located in the valve body. The valve core can move up and down in the valve body. The valve body has a water inlet channel and a water outlet channel. The valve body also has a water passing hole that connects the water inlet channel and the water outlet channel and is correspondingly arranged with the valve core. On the outer side of the lower end of the valve core, a first conical surface and a second conical surface are sequentially arranged from bottom to top. Both the first conical surface and the second conical surface are inverted cones, and the included angle between the first conical surface and the axis of the valve core is greater than the included angle between the second conical surface and the axis of the valve core. The second conical surface can abut against the upper port of the water passing hole. When the valve core abuts against the upper port of the water passing hole, the heating temperature control valve is in a cut-off state; when the heating temperature control valve is in an open state, a gap is formed between the outer side of the lower end of the valve core and the upper port of the water passing hole for hot water to flow through. By moving the valve core up or down, the size of the gap can be adjusted, so that the flow rate of the hot water passing through is changed to achieve the purpose of changing the temperature.

[0003] However, the above heating temperature control valve also has deficiencies: the hot water only passes through the gap between the outer side of the lower end of the valve core and the upper port of the water passing hole. This gap slowly increases as the valve core moves upward, and the hot water flow rate also slowly increases during this process, which results in a relatively slow actual heating response speed of the radiator, that is, it takes a long time to heat up to the corresponding temperature. Summary of the Utility Model

[0004] The purpose of the present utility model is to propose a temperature control valve for the above problems existing in the prior art, and solve the problem of slow heating response speed of the radiator.

[0005] The purpose of the present utility model can be achieved by the following technical solutions:

[0006] A temperature control valve includes a valve body with a water passing hole inside and a valve rod vertically penetrating through the valve body and capable of moving up and down. The lower end of the valve rod has a sealing head. The outer side of the sealing head has a sealing surface with a diameter gradually increasing from bottom to top. The aperture of the water passing hole is between the maximum diameter and the minimum diameter of the sealing surface. The sealing head can abut against the upper end of the water passing hole to form a seal. It is characterized in that the bottom of the sealing head has a concave cavity, and a water passing port is provided on the outer side of the part of the sealing head where the sealing surface is located. The water passing port is communicated with the concave cavity. When the sealing head abuts against the upper end of the water passing hole to form a seal, the water passing port is located below the sealing position between the sealing head and the water passing hole.

[0007] Similar to the existing ones, this temperature control valve is usually in the normally open state. In this state, there is a gap between the sealing surface of the sealing head and the upper port edge of the water passage hole, and hot water flows through this gap. When the temperature needs to be adjusted, the user controls the valve stem to move upward or downward. Moving upward means increasing the gap between the sealing surface and the upper port edge of the water passage hole, so that the hot water flow rate passing through increases (to raise the temperature in this way), and moving downward means decreasing the gap between the sealing surface and the upper port edge of the water passage hole, so that the hot water flow rate passing through decreases (to lower the temperature in this way). When it needs to be closed, the control valve stem moves downward until the sealing head abuts against the inside of the upper end of the water passage hole, and a hard seal is formed by the sealing surface abutting against the upper port edge of the water passage hole.

[0008] This temperature control valve is provided with a concave cavity at the bottom of the sealing head and a water passing port connected to the concave cavity on the side of the sealing head. In this way, when the valve stem moves upward until the upper inner wall of the water passing port is higher than the upper port edge of the water passage hole, a part of the water passing port is higher than the water passage hole (as the valve stem continues to move upward, the part of the water passing port higher than the water passage hole also becomes larger and larger). At this time, the part of the water passing port higher than the water passage hole can also supply hot water to pass through. Thus, the water passing area of the hot water can be significantly increased (while the gap between the sealing head and the upper end hole of the water passage hole becomes larger, the part of the water passing port higher than the water passage hole is also constantly increasing. The double increase in the water passing area can significantly improve the hot water flow rate), making the flow rate adjustment effect more significant and improving the heating response speed of the radiator.

[0009] In the above temperature control valve, the number of the water passing ports is several, and each water passing port is circumferentially distributed, and the heights of each water passing port are the same.

[0010] Through the above settings, the water passing area of the hot water can be further significantly increased.

[0011] In the above temperature control valve, the sizes of each water passing port are the same.

[0012] In the above temperature control valve, each water passing port is in the shape of a parallelogram or each water passing port is in the shape of an isosceles triangle.

[0013] Through the setting of the shape of each water passing port and the same setting of the sizes, the flow rate change caused by the movement of the valve stem can be more linear, improving the accuracy of temperature control.

[0014] In the above temperature control valve, a control rod is vertically penetrated through the inner edge of the upper end of the valve body. The control rod is axially fixed to the valve body and can rotate relative to the valve body. The valve stem is threadedly connected to the lower end of the control rod, and the valve stem is circumferentially fixed to the valve body. The upper end of the control rod extends out of the valve body and is fixedly connected with a handwheel. A scale mark is provided along the circumference on the outer side of the bottom of the handwheel. An indicating arrow is provided on the outer side of the upper end of the valve body at a position lower than the handwheel, and the indicating arrow points upward to the scale mark.

[0015] The control rod is axially fixed to the valve body and can rotate relative to the valve body. The valve stem is threadedly connected to the lower end of the control rod and is circumferentially fixed to the valve body. This means that rotating the control rod can drive the valve stem to move up and down along the thread to achieve flow regulation or valve opening and closing operations. Moreover, the control rod only rotates and does not move up and down. On this basis, a handwheel is fixedly connected to the upper end of the control rod. A scale mark is provided along the circumference on the outer side of the bottom of the handwheel. An indicating arrow is provided on the outer side of the upper end of the valve body, lower than the outer side of the handwheel, and the indicating arrow points upward to the scale mark, so that users can intuitively grasp the temperature corresponding to the flow rate of the current temperature valve.

[0016] In the above temperature control valve, a strip-shaped limiting groove is provided in the valve body along the vertical direction, and an anti-rotation portion arranged in a strip shape along the vertical direction is provided on the outer side of the valve stem, and the anti-rotation portion is located in the limiting groove.

[0017] Through the cooperation of the above anti-rotation portion and the limiting groove, the rotation of the valve stem is restricted, so that when the control rod rotates, the valve stem can be driven to move up and down by the thread to achieve the flow regulation or opening and closing operation of the temperature control valve.

[0018] In the above temperature control valve, the valve body includes a main body and a valve cap threadedly connected to the upper end of the main body. The bottom of the valve cap has a cavity, and the limiting groove is provided on the inner wall of the cavity. The control rod is inserted into the upper end of the valve cap, the lower end of the control rod is located in the cavity, and an annular shoulder that abuts against the bottom wall of the cavity is provided on the outer side of the control rod. An annular groove is provided on the outer side of the upper end of the control rod, and a snap ring is provided in the annular groove, and the snap ring abuts against the upper end surface of the valve cap.

[0019] During assembly, the control rod is inserted upward from the bottom of the valve cap, so that the annular shoulder on the outer side of the control rod abuts against the bottom wall of the cavity at the bottom of the valve cap, and the upper end of the control rod passes through the valve cap. Then, the snap ring is directly clamped in the annular groove on the outer side of the upper end of the control rod, and the snap ring abuts against the upper end surface of the valve cap. In this way, by means of the abutment of the snap ring against the upper end surface of the valve cap and the abutment of the annular shoulder against the bottom wall of the cavity, the axial connection between the control rod and the valve cap is achieved.

[0020] Compared with the prior art, in the present temperature control valve, a concave cavity is provided at the bottom of the sealing head and a water passing port communicating with the concave cavity is provided at the side of the sealing head. When the valve stem moves upward until the upper inner wall of the water passing port is higher than the upper port edge of the water passing hole, a part of the water passing port is higher than the water passing hole. In this way, the part of the water passing port higher than the water passing hole can also supply hot water to pass through, thereby significantly increasing the water passing area of the hot water, making the flow regulation effect more significant, and improving the heating response speed of the radiator. Brief Description of the Drawings

[0021] Figure 1 It is a three-dimensional schematic diagram of the present temperature control valve.

[0022] Figure 2 It is a cross-sectional view of this temperature control valve.

[0023] Figure 3 It is an exploded schematic diagram between the valve stem and the valve cap in this temperature control valve.

[0024] In the figure, 1. Valve body; 1a. Body; 1a1. Water passing hole; 1a2. Indicator arrow; 1b. Valve cap; 1b1. Limit groove; 1b2. Cavity; 2. Valve stem; 2a. Sealing head; 2a1. Sealing surface; 2a2. Concave cavity; 2a3. Water passing port; 2b. Fitting hole; 2c. Anti-rotation part; 3. Control rod; 3a. Annular shoulder; 3b. Annular groove; 4. Handwheel; 4a. Scale mark; 4b. Connecting part; 5. Snap ring; 6. Screw; 7. Inlet joint; 8. Outlet joint. Specific implementation mode

[0025] The following are specific embodiments of the present invention and in combination with the attached drawings, the technical solutions of the present invention will be further described, but the present invention is not limited to these embodiments.

[0026] As Figure 1 、 Figure 2 and Figure 3 shown, the temperature control valve includes a valve body 1 and a valve stem 2 that is vertically inserted into the valve body 1 and can move up and down. The valve body 1 also has an inlet end and an outlet end, and there is a water passing hole 1a1 in the valve body 1 that connects the inlet end and the outlet end. The lower end of the valve stem 2 has a sealing head 2a, and the outer side of the sealing head 2a has a sealing surface 2a1 with a diameter gradually increasing from bottom to top. The aperture of the water passing hole 1a1 is between the maximum outer diameter and the minimum outer diameter of the sealing surface 2a1, and the sealing head 2a abuts against the upper port of the water passing hole 1a1 to form a seal. Among them, a control rod 3 is vertically inserted into the upper end of the valve body 1. The control rod 3 is axially fixed to the valve body 1 and can rotate relative to the valve body 1. The upper end of the valve stem 2 is provided with a fitting hole 2b, and the lower end of the control rod 3 is threadedly connected into the fitting hole 2b. The valve stem 2 is circumferentially fixed to the valve body 1. Specifically, a strip-shaped limit groove 1b1 is vertically provided in the valve body 1, and the outer side of the valve stem 2 has a strip-shaped anti-rotation part 2c arranged vertically. The anti-rotation part 2c is located in the limit groove 1b1, and the number of both the anti-rotation part 2c and the limit groove 1b1 is two. The upper end of the control rod 3 extends out of the valve body 1 and is fixedly connected to a handwheel 4. The outer side of the bottom of the handwheel 4 is provided with scale marks 4a in the circumferential direction. An indicator arrow 1a2 is provided on the outer side of the upper end of the valve body 1 at a position lower than the handwheel 4, and the indicator arrow 1a2 points upward to the scale marks 4a.

[0027] As Figure 2As shown, in this embodiment, the valve body 1 includes a main body 1a and a valve cap 1b threadedly connected to the upper end of the main body 1a. The bottom of the valve cap 1b has a cavity 1b2, and a limiting groove 1b1 is provided on the inner wall of the cavity 1b2. The control rod 3 is inserted into the upper end of the valve cap 1b. The lower end of the control rod 3 is located in the cavity 1b2, and an annular shoulder 3a that abuts against the bottom wall of the cavity 1b2 is provided on the outer side of the control rod 3. An annular groove 3b is provided on the outer side of the upper end of the control rod 3, and a snap ring 5 is provided in the annular groove 3b. The snap ring 5 abuts against the upper end surface of the valve cap 1b. The handwheel 4 is in the shape of a cylinder with an open lower end. A connecting portion 4b is integrally fixed inside the upper end of the handwheel 4. The bottom of the connecting portion 4b has a connecting hole. The upper end portion of the control rod 3 is located in the connecting hole and the two are circumferentially fixed (actually splined). The handwheel 4 and the control rod 3 are axially fixed by a screw 6 that penetrates into the connecting portion 4b and is threadedly connected to the control rod 3. The water inlet end is connected to a water inlet joint 7, and the water outlet end is connected to a water outlet joint 8.

[0028] Further, as Figure 2 and Figure 3 shown, the bottom of the sealing head 2a has a concave cavity 2a2. The sealing head 2a is provided with a water passing port 2a3 on the outer side of the part where the sealing surface 2a1 is located. The water passing port 2a3 is communicated with the concave cavity 2a2. When the sealing head 2a abuts against the upper end inside the water passing hole 1a1 to form a seal, the water passing port 2a3 is located below the sealing position between the sealing head 2a and the water passing hole 1a1. Specifically, the number of the water passing ports 2a3 is several, and each water passing port 2a3 is uniformly distributed circumferentially. Moreover, the heights of all the water passing ports 2a3 are the same. Each water passing port 2a3 is in the shape of a parallelogram (of course, each water passing port 2a3 can also be an isosceles triangle), and the sizes of all the water passing ports 2a3 are the same. Each water passing port 2a3 is uniformly distributed on the side part of the sealing head 2a.

[0029] Each temperature control valve is usually in the normally open state. In this state, there is a gap between the sealing surface 2a1 of the sealing head 2a and the upper port edge of the water passing hole 1a1, and the hot water flows through this gap. When the temperature needs to be adjusted, the user rotates the control rod 3, and drives the valve rod 2 to move up or down through the threaded connection between the control rod 3 and the valve rod 2. Moving up means increasing the gap between the sealing surface 2a1 and the upper port edge of the water passing hole 1a1 so that the hot water flow rate passing through increases (thereby increasing the temperature), and moving down means decreasing the gap between the sealing surface 2a1 and the upper port edge of the water passing hole 1a1 so that the hot water flow rate passing through decreases (thereby decreasing the temperature). When it needs to be closed, rotate the control rod 3 to drive the valve rod 2 to move down until the sealing head 2a abuts against the upper end inside the water passing hole 1a1, and a hard seal is formed by the sealing surface 2a1 abutting against the upper port edge of the water passing hole 1a1.

[0030] In the present temperature control valve, a concave cavity 2a2 is provided at the bottom of the sealing head 2a, and a plurality of water passing ports 2a3 which are all communicated with the concave cavity 2a2 are provided at the side of the sealing head 2a. In this way, when the valve stem 2 moves upward until the upper inner walls of the water passing ports 2a3 are higher than the upper port edge of the water passing hole 1a1, a part of each water passing port 2a3 is higher than the water passing hole 1a1 (as the valve stem 2 continuously moves upward, the part of each water passing port 2a3 higher than the water passing hole 1a1 becomes larger and larger). At this time, the part of each water passing port 2a3 higher than the water passing hole 1a1 can also allow hot water to pass through. Therefore, the water passing area of the hot water can be significantly increased, making the flow regulation effect more remarkable and improving the heating response speed of the radiator.

[0031] The specific embodiments described herein are merely illustrative of the spirit of the present invention. Those skilled in the art of the present invention can make various modifications or supplements to the described specific embodiments or use similar methods to replace them, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. Temperature control valve, comprising a valve body (1) with a water passage hole (1a1) inside and a valve stem (2) vertically penetrating through the valve body (1) and capable of moving up and down. The lower end of the valve stem (2) has a sealing head (2a), and the outer side of the sealing head (2a) has a sealing surface (2a1) with a diameter gradually increasing from bottom to top. The aperture of the water passage hole (1a1) is between the maximum diameter and the minimum diameter of the sealing surface (2a1). The sealing head (2a) can abut against the upper end inside the water passage hole (1a1) to form a seal, characterized in that, The bottom of the described sealing head (2a) has a concave cavity (2a2). On the outer side of the part of the sealing head (2a) where the sealing surface (2a1) is located, there is a water passing port (2a3). The water passing port (2a3) is communicated with the concave cavity (2a2). When the sealing head (2a) abuts against the upper end inside the water passing hole (1a1) to form a seal, the water passing port (2a3) is located below the sealing position between the sealing head (2a) and the water passing hole (1a1).

2. The temperature control valve according to claim 1, characterized in that, The number of the described water passing ports (2a3) is several. Each water passing port (2a3) is distributed circumferentially, and the heights of each water passing port (2a3) are the same.

3. The temperature control valve according to claim 2, characterized in that, The sizes of each water passing port (2a3) are the same.

4. The temperature control valve according to claim 3, characterized in that, Each water passing port (2a3) is in the shape of a parallelogram or each water passing port (2a3) is in the shape of an isosceles triangle.

5. The temperature control valve according to claim 1 or 2 or 3 or 4, characterized in that, A control rod (3) is vertically penetrated inside the upper end of the described valve body (1). The control rod (3) is axially fixed to the valve body (1) and the control rod (3) can rotate relative to the valve body (1). The valve stem (2) is threadedly connected to the lower end of the control rod (3). The valve stem (2) is circumferentially fixed to the valve body (1). The upper end of the control rod (3) extends outside the valve body (1) and is fixedly connected with a hand wheel (4). A scale mark (4a) is arranged circumferentially on the outer side of the bottom of the hand wheel (4). An indicating arrow (1a2) is arranged on the outer side of the upper end of the valve body (1) at a position lower than the hand wheel (4). The indicating arrow (1a2) points upward to the scale mark (4a).

6. The temperature control valve according to claim 5, characterized in that, A strip-shaped limiting groove (1b1) is arranged vertically inside the described valve body (1). On the outer side of the valve stem (2), there is a strip-shaped anti-rotation part (2c) arranged vertically. The anti-rotation part (2c) is located inside the limiting groove (1b1).

7. The temperature control valve according to claim 6, characterized in that, The described valve body (1) includes a main body (1a) and a valve cap (1b) threadedly connected to the upper end of the main body (1a). The bottom of the valve cap (1b) has a cavity (1b2). The limiting groove (1b1) is arranged on the inner wall of the cavity (1b2). The control rod (3) is penetrated inside the upper end of the valve cap (1b). The lower end of the control rod (3) is located inside the cavity (1b2) and an annular shoulder (3a) that abuts against the bottom wall of the cavity (1b2) is arranged on the outer side of the control rod (3). An annular groove (3b) is arranged on the outer side of the upper end of the control rod (3). A circlip (5) is arranged inside the annular groove (3b). The circlip (5) abuts against the upper end face of the valve cap (1b).

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