A temperature-sensitive automatic flow control valve

Abstract

The present invention provides a temperature-sensitive automatic flow regulating valve, belonging to the technical field of valves. It solves the problem that the existing flow regulating valve cannot maintain a stable water outlet flow rate under the fluctuation of the inlet water pressure. This temperature-sensitive automatic flow regulating valve includes a valve body and an inlet joint and an outlet joint respectively arranged at both ends of the valve body. There is a groove on the end face of the valve body towards the inlet joint end, and a number of first water passing holes are distributed on the groove. An avoidance groove is arranged outside the first water passing holes. A constant flow rubber ring that can deform according to the change of the inlet water pressure is placed in the groove. There is a step in the middle of the valve body, and a second water passing hole is opened in the middle of the step. A flow regulating plunger is arranged in the second water passing hole, and a first sealing ring that can be in sealing contact with the end face of the step is arranged on the flow regulating plunger. A water passing gap for adjusting the distance between the second water passing holes is formed between the first sealing ring and the end face of the step. The present invention has the advantages of being able to adjust the size of the water outlet flow rate according to the height of the inlet water temperature and having a stable water outlet flow rate.

Description

Technical Field

[0001] The present invention belongs to the technical field of valves, and relates to a flow regulating valve, in particular to a temperature-sensitive automatic flow regulating valve. Background Art

[0002] A flow regulating valve controls the water outlet flow rate of a fluid by narrowing or expanding the flow channel cross-section. Currently, ordinary flow regulating valves cannot automatically adjust the water outlet flow rate according to the inlet water temperature.

[0003] As a new type of temperature-sensitive element, a shape memory alloy spring has the advantages of sensitive temperature sensing, a large temperature control range, corrosion resistance, and a longer service life. Therefore, it can meet the special working conditions with rapid temperature fluctuations, large temperature differences, and high working frequencies.

[0004] Under fluctuating inlet water pressure, the water outlet flow rate of an ordinary flow regulating valve cannot be kept stable. Summary of the Invention

[0005] The purpose of the present invention is to provide a flow regulating valve that can adjust the water outlet flow rate according to the height of the inlet water temperature and has a stable water outlet flow rate for the problems existing in the prior art.

[0006] The purpose of the present invention can be achieved by the following technical solutions: a temperature-sensitive automatic flow regulating valve, characterized in that it includes a valve body, an inlet joint and an outlet joint respectively arranged at both ends of the valve body. One end surface of the valve body facing the inlet joint has a groove, and a number of water passing holes I are distributed on the groove. An avoidance groove is arranged outside the water passing holes I. A constant flow rubber ring that can deform according to the change of the inlet water pressure is placed in the groove. The middle of the valve body has a step, and a water passing hole II is opened in the middle of the step. A flow regulating plunger is arranged in the water passing hole II and can move axially. A sealing ring I that can be sealed and abutted against the end surface of the step is arranged on the flow regulating plunger. A water passing gap for adjusting the distance between the water passing holes II is formed between the sealing ring I and the end surface of the step. A spring I is arranged in the inlet joint, and a spring fixing seat connected to the flow regulating plunger is arranged at the rear end of the spring I. The rear end of the spring I abuts against the spring fixing seat. A spring II that abuts against the rear end of the flow regulating plunger is arranged in the outlet joint.

[0007] In the above-mentioned temperature-sensitive automatic flow regulating valve, a number of water passing holes III are opened at the end of the flow regulating plunger that abuts against the spring II.

[0008] In the above-mentioned temperature-sensitive automatic flow regulating valve, the spring I is a return spring or a shape memory alloy spring.

[0009] In the above-mentioned temperature-sensitive automatic flow regulating valve, the spring II is a return spring or a shape memory alloy spring.

[0010] In the above temperature-sensitive automatic flow control valve, there are sealing rings II between the valve body and the water inlet joint and between the valve body and the water outlet joint, respectively, which play a sealing role.

[0011] In the above temperature-sensitive automatic flow control valve, hexagonal protrusions for easy disassembly are provided on the outer sides of the water inlet joint and the water outlet joint, and external connection threads are also provided at the front ends of the water inlet joint and the water outlet joint.

[0012] In the above temperature-sensitive automatic flow control valve, indication marks of the water flow direction and size marks of the water inlet joint and the water outlet joint are provided on the outer wall of the valve body.

[0013] Compared with the prior art, the temperature-sensitive automatic flow control valve of the present invention is internally provided with a reset spring and a shape memory alloy spring. By the temperature-induced expansion of the shape memory alloy spring, the water passing gap between the flow control plunger and the boss is adjusted to achieve the purpose of automatic flow control. The shape memory alloy spring has high temperature sensing accuracy, so that the automatic flow control valve has the advantages of high flow control accuracy and stable water outlet. BRIEF DESCRIPTION OF THE DRAWINGS

[0014] Figure 1 is a schematic perspective view of the temperature-sensitive automatic flow control valve of the present invention.

[0015] Figure 2 is a schematic cross-sectional view of the temperature-sensitive automatic flow control valve of the present invention.

[0016] Figure 3 is a schematic perspective view of the valve body.

[0017] Figure 4 is an exploded view of the temperature-sensitive automatic flow control valve of the present invention.

[0018] In the figures, 1, valve body; 2, water inlet joint; 3, water outlet joint; 4, groove; 5, water passing hole I; 6, clearance groove; 7, constant flow rubber ring; 8, step; 9, water passing hole II; 10, spring I; 11, spring fixing seat; 12, flow control plunger; 13, spring II; 14, sealing ring I; 15, water passing gap; 16, water passing hole III; 17, sealing ring II; 18, indication mark; 19, hexagonal protrusion; 20, external connection thread. DETAILED DESCRIPTION OF THE EMBODIMENTS

[0019] The following are specific embodiments of the present invention in combination with the drawings to further describe the technical solutions of the present invention, but the present invention is not limited to these embodiments.

[0020] As Figure 1 , Figure 2 , Figure 3 , Figure 4As shown in the figure, this temperature-sensitive automatic flow control valve includes a valve body 1, and a water inlet joint 2 and a water outlet joint 3 respectively arranged at both ends of the valve body 1. There is a groove 4 on the end face of the valve body 1 facing the water inlet joint 2. A number of first water passing holes 5 are distributed on the groove 4. An emptying groove 6 is arranged outside the first water passing holes 5. A constant flow rubber ring 7 that can deform according to the change of the inlet water pressure is placed in the groove 4. And through the setting of the emptying groove 6, it can prevent the constant flow rubber ring 7 from deforming excessively and blocking the first water passing holes 5. There is a step 8 in the middle of the valve body 1, and a second water passing hole 9 is opened in the middle of the step 8. A flow control plunger 12 is arranged in the second water passing hole 9, and the flow control plunger 12 can move axially. A first sealing ring 14 that can be in sealed contact with the end face of the step 8 is arranged on the flow control plunger 12. A water passing gap 15 for adjusting the distance of the second water passing hole 9 is formed between the first sealing ring 14 and the end face of the step 8. A first spring 10 is arranged in the water inlet joint 2. A spring fixing seat 11 connected to the flow control plunger 12 is arranged at the rear end of the first spring 10. The rear end of the first spring 10 abuts against the spring fixing seat 11. A second spring 13 that abuts against the rear end of the flow control plunger 12 is arranged in the water outlet joint 3. The spring is a reset spring that produces a pressing down and reset effect through preloading in a limited space, and a shape memory alloy spring that can expand and contract according to temperature changes, resulting in a change in elastic force. When the inlet water temperature reaches a certain temperature value, the elastic force of the shape memory alloy spring will be greater than the elastic force of the reset spring, and the flow control plunger 12 will move axially, so that the flow control valve can achieve the effect of automatically adjusting the flow according to the size of the inlet water temperature. When the first sealing ring 14 of the temperature-sensitive automatic flow control valve is in contact with the end face of the step 8, water enters through the water inlet joint 2, flows through the first water passing holes 5 in the groove 4 of the valve body 1, and the constant flow rubber ring 7 in the groove 4 deforms according to the size of the water pressure, affecting the size of the water passing pores of the first water hole. The greater the pressure, the smaller the water passing pores, thus achieving a certain constant flow effect.

[0021] Preferably, a number of third water passing holes 16 are opened at the end of the flow control plunger 12 that abuts against the second spring 13.

[0022] Preferably, the first spring 10 is a reset spring or a shape memory alloy spring.

[0023] Preferably, the second spring 13 is a reset spring or a shape memory alloy spring.

[0024] When the first spring 10 is a reset spring and the second spring 13 is a shape memory alloy spring, water flows into the water inlet joint 2. The elastic force of the reset spring is greater than the elastic force of the shape memory alloy spring. The flow control plunger 12 is pressed down, and the first sealing ring 14 abuts against the end face of the boss to form a closed state. The water flow passes through the constant flow rubber ring 7 and enters the water outlet joint 3 through the first water passing holes 5, and contacts and reacts with the shape memory alloy spring. When the inlet water temperature rises, the shape memory alloy spring elongates and the elastic force becomes larger, pushing the flow control plunger 12 to move axially towards the reset spring, and the water passing gap 15 increases, thus achieving the effect of automatically increasing the flow;

[0025] When the first spring - 10 is a shape - memory alloy spring and the second spring - 13 is a return spring, the elastic force of the return spring is greater than that of the shape - memory alloy spring. The flow - regulating plunger 12 moves forward, and the first sealing ring 14 provided on the flow - regulating plunger 12 moves away from the end of the boss. The second water - passing hole 9 is in an open state, and water flows into the water inlet joint 2 and contacts the shape - memory alloy spring to react. When the inlet water temperature rises, it will cause the memory spring to elongate, the elastic force becomes larger, and it pushes the flow - regulating plunger 12 to move axially towards the return spring, and the water - passing gap 15 decreases, thus achieving the effect of automatic flow limiting.

[0026] To elaborate further, in order to improve the sealing performance of the flow - regulating valve, there are second sealing rings 17 for sealing between the valve body 1 and the water inlet joint 2 and between the valve body 1 and the water outlet joint 3.

[0027] Preferably, hexagonal protrusions 19 for easy disassembly are provided on the outer sides of the water inlet joint 2 and the water outlet joint 3, and external connection threads 20 are also provided at the front ends of the water inlet joint 2 and the water outlet joint 3.

[0028] Preferably, an indication mark 18 of the water flow direction and size marks of the water inlet joint 2 and the water outlet joint 3 are provided on the outer wall of the valve body 1.

[0029] The specific embodiments described in this text are only illustrative of the spirit of the present invention. Those skilled in the art to which the present invention pertains can make various modifications or supplements to the described specific embodiments or use similar ways to substitute, but will not deviate from the spirit of the present invention or exceed the scope defined by the appended claims.

Claims

1. A temperature-sensitive automatic flow control valve, characterized in that, It includes a valve body (1), a water inlet joint (2) and a water outlet joint (3) respectively arranged at both ends of the valve body (1). On the end face of the valve body (1) towards the water inlet joint (2), there is a groove (4), on which a number of first water passing holes (5) are distributed. An avoidance groove (6) is arranged outside the first water passing holes (5). A constant flow rubber ring (7) that can deform according to the change of the inlet pressure is placed in the groove (4). In the middle of the valve body (1), there is a step (8), and a second water passing hole (9) is opened in the middle of the step (8). A flow regulating plunger (12) is arranged in the second water passing hole (9), and the flow regulating plunger (12) can move axially. A first sealing ring (14) that can be in sealed abutment with the end face of the step (8) is arranged on the flow regulating plunger (12). A water passing gap (15) for adjusting the distance between the second water passing holes (9) is formed between the first sealing ring (14) and the end face of the step (8). A first spring (10) is arranged in the water inlet joint (2). At the rear end of the first spring (10), there is a spring fixing seat (11) connected to the flow regulating plunger (12). The rear end of the first spring (10) abuts against the spring fixing seat (11). A second spring (13) that abuts against the rear end of the flow regulating plunger (12) is arranged in the water outlet joint (3); A number of third water passing holes (16) are opened at the end of the flow regulating plunger (12) that abuts against the second spring (13); The first spring (10) is a return spring; The second spring (13) is a shape memory alloy spring.

2. The thermosensitive automatic flow regulating valve according to claim 1, characterized in that Sealing rings (17) for sealing are provided between the valve body (1) and the water inlet joint (2) and between the valve body (1) and the water outlet joint (3).

3. The thermosensitive automatic flow regulating valve according to claim 1, characterized in that, Hexagonal protrusions (19) for easy disassembly are arranged on the outer sides of the water inlet joint (2) and the water outlet joint (3). External connection threads (20) are also provided at the front ends of the water inlet joint (2) and the water outlet joint (3).

4. The thermosensitive automatic flow regulating valve according to claim 1, characterized in that An indication mark (18) of the water flow direction and size marks of the water inlet joint (2) and the water outlet joint (3) are provided on the outer wall of the valve body (1).

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