Mechanical anti-freezing valve

Abstract

The utility model provides a mechanical anti-freezing valve which comprises a valve body and an electromagnetic valve head, a water passing channel is arranged in the valve body, the two ends of the water passing channel penetrate through the valve body and respectively form a water inlet connector and a water outlet connector, the valve body is further provided with a pressure relief groove, and the pressure relief groove is communicated with the water passing channel. The pressure relief valve further comprises a pressure relief assembly, the pressure relief assembly comprises a pressure relief cover and a pressure relief rod, a reset piece is arranged between the pressure relief cover and the pressure relief rod, the pressure relief rod is embedded into the pressure relief groove in a sealed mode, and when liquid such as water in the valve body is frozen, the pressure generated by the liquid enables the pressure relief rod to gradually open the pressure relief groove. The ice-water mixture generated in the icing process can flow into the pressure relief cover, the larger the pressure is, the deformation quantity of the reset piece is increased, the volume of the cavity is increased, after icing, the reset piece is reset, the liquid is discharged towards the direction of the water passing channel, and through the design, the situation that the valve body is cracked due to the expansion volume of the frozen liquid can be avoided.

Description

TECHNICAL FIELD

[0001] The utility model relates to solenoid valve technical field, concretely relates to a mechanical freeze-proof valve. BACKGROUND

[0002] Theoretically, when the ambient temperature drops below 0 DEG C, the liquid such as water transported by the solenoid valve will freeze, and the volume of the water will expand by about 9% when it freezes, and the force generated by the ice expansion will damage the valve body of the solenoid valve. Based on the above technical problems, a mechanical freeze-proof valve capable of avoiding damage to the valve body due to ice expansion is needed. SUMMARY

[0003] In view of the deficiencies in the prior art, the utility model aims to provide a mechanical freeze-proof valve to solve the problems mentioned in the background section.

[0004] The utility model discloses the following technical scheme:

[0005] A mechanical freeze-proof valve, comprising a valve body and a solenoid valve head, the inside of the valve body is provided with a water passage, the two ends of the water passage penetrate through the valve body and respectively form a water inlet interface and a water outlet interface, the valve body is also provided with a pressure relief groove, the pressure relief groove is communicated with the water passage; further comprising a pressure relief assembly, the pressure relief assembly comprises a pressure relief cover and a pressure relief rod, a reset member is arranged between the pressure relief cover and the pressure relief rod, and the pressure relief rod is sealingly embedded in the pressure relief groove.

[0006] Further, the pressure relief rod comprises a first sealing part and a second sealing part, the first sealing part is sleeved with a first sealing ring, and the first sealing ring abuts against the pressure relief groove; the second sealing part is sleeved with a second sealing ring, and the second sealing ring abuts against the inner wall of the pressure relief cover.

[0007] Further, the pressure relief rod further comprises a guide part, and the pressure relief cover is provided with a guide hole matched with the guide part.

[0008] Further, the valve body is also provided with a flow guide groove, one end of the flow guide groove is communicated with the pressure relief cover, and the other end of the flow guide groove is communicated with the water outlet interface.

[0009] Further, a one-way valve is arranged in the flow guide groove, and the one-way valve allows water to flow only in the direction of the water outlet interface.

[0010] Further, a pressing plate is further arranged between the valve body and the pressure relief cover, and the pressing plate is used for preventing the one-way valve from being separated from the flow guide groove.

[0011] Further, the reset member is a spring.

[0012] Further, the cross-sectional area of the pressure relief groove is S, the minimum compression resistance pressure of the pressure relief assembly is P1, and the maximum compression resistance pressure of the pressure relief assembly is P2.

[0013] When the pressure relief rod blocks the pressure relief groove, the spring is at a first compression length, and when the spring is at the first compression length, the force of the spring is in a range of S*P1+2N to S*P1+8N.

[0014] When the pressure relief rod unblocks the pressure relief groove, the spring is at a second compression length, and when the spring is at the second compression length, the force of the spring is in a range of S*P2 to S*P2+2N.

[0015] Further, the ratio of the maximum water volume accommodated by the valve body to the maximum water volume accommodated by the pressure relief cover is greater than 1:5.

[0016] Further, the pressure relief assembly, the water inlet interface of the valve body, and the water outlet interface of the valve body are respectively arranged towards the X-axis, the Y-axis, and the Z-axis, and the electromagnetic valve head is arranged at a symmetrical position of the water inlet interface or the water outlet interface.

[0017] The mechanical anti-freezing valve has the advantages that: the mechanical anti-freezing valve comprises a valve body and an electromagnetic valve head, the inside of the valve body is provided with a water passing channel, the two ends of the water passing channel penetrate through the valve body and respectively form a water inlet interface and a water outlet interface, the valve body is further provided with a pressure relief groove, and the pressure relief groove is in communication with the water passing channel; the mechanical anti-freezing valve further comprises a pressure relief assembly, the pressure relief assembly comprises a pressure relief cover and a pressure relief rod, a reset member is arranged between the pressure relief cover and the pressure relief rod, and the pressure relief rod is sealingly embedded in the pressure relief groove; when the liquid in the valve body, for example, water, is frozen, the pressure generated by the liquid will gradually open the pressure relief groove, the ice-water mixture generated in the freezing process will run into the pressure relief cover, and the greater the pressure, the greater the deformation amount of the reset member, so that the cavity volume is increased; when the ice is thawed, the reset member is reset and the liquid is discharged towards the water passing channel; and the above design can avoid the expansion volume of the frozen liquid from causing the valve body to be cracked. BRIEF DESCRIPTION OF DRAWINGS

[0018] Fig. 1 It is a perspective view of the utility model.

[0019] Fig. 2 It is an exploded view of the utility model.

[0020] Fig. 3 It is another exploded view of the utility model.

[0021] Fig. 4 It is a central section view of the utility model.

[0022] In the above drawings, the following reference signs are used:

[0023] 1, valve body; 11, water passage; 111, water inlet; 112, water outlet; 12, pressure relief groove; 13, flow guide groove; 2, electromagnetic valve head; 21, moving iron core; 22, pressure relief hole; 23, diaphragm; 3, pressure relief assembly; 31, pressure relief cover; 311, guide hole; 32, pressure relief rod; 321, first sealing part; 322, second sealing part; 323, guide part; 33, spring; 34, first sealing ring; 35, second sealing ring; 4, check valve; 5, pressing plate. DETAILED DESCRIPTION

[0024] To make the purposes, technical solutions and advantages of the embodiments of the present application clearer, the technical solutions in the embodiments of the present application will be described below in connection with the drawings of the embodiments of the present application. It should be noted that the descriptions of the embodiments are used to help understand the present application and do not constitute limitations on the present application. In addition, the technical features involved in each of the embodiments of the present application can be combined with each other as long as they do not conflict with each other.

[0025] Referring to Figs. 1 to 4 Fig. 1, a mechanical anti-freezing valve includes a valve body 1 and an electromagnetic valve head 2. The valve body 1 is internally provided with a water passage 11. Both ends of the water passage 11 penetrate through the valve body 1 and respectively constitute a water inlet 111 and a water outlet 112. The electromagnetic valve head 2 includes a moving iron core 21, a connecting piece and a diaphragm 23. The diaphragm 23 is sleeved on the outer periphery of the connecting piece. The connecting piece is provided with a pressure relief hole 22. The moving iron core 21 is movable between a position for plugging the pressure relief hole 22 and a position for allowing the pressure relief hole 22 to be relieved. A pressure difference caused by moving the moving iron core 21 drives the diaphragm 23 to move, so that the other end of the diaphragm 23 is movable between a position for blocking the water passage 11 and a position for opening the water passage 11.

[0026] The main improvement of the present application is that the valve body 1 is further provided with a pressure relief groove 12, which is in communication with the water passage 11. The present application further includes a pressure relief assembly 3, which includes a pressure relief cover 31 and a pressure relief rod 32. A reset member is arranged between the pressure relief cover 31 and the pressure relief rod 32. The pressure relief rod 32 is sealingly embedded in the pressure relief groove 12. The pressure relief cover 31 and the valve body 1 can be locked and connected by screws.

[0027] When the liquid, for example, water, in the valve body 1 is frozen, the pressure generated by the liquid will gradually open the pressure relief groove 12 by the pressure relief rod 32. The ice-water mixture generated during the freezing process will run into the pressure relief cover 31. The greater the pressure, the greater the deformation of the reset member, which will increase the volume of the chamber. When the ice melts, the reset member resets and the liquid is discharged towards the water passage 11. Through the above design, the expansion volume of the frozen liquid can be avoided to cause the valve body 1 to be cracked.

[0028] The pressure relief rod 32 comprises a first sealing part 321 and a second sealing part 322, the first sealing part 321 is sleeved with a first sealing ring 34, and the first sealing ring 34 abuts against the pressure relief groove 12; the second sealing part 322 is sleeved with a second sealing ring 35, and the second sealing ring 35 abuts against the inner wall of the pressure relief cover 31. Through the above structure, the space between the second sealing part 322 and the valve body 1 constitutes a chamber for the ice-water mixture, at this time, the processes of ice formation and ice melting are both adjusted by the automatic reset of the reset member to adjust the volume of the chamber, so as to realize automatic pressure regulation.

[0029] The pressure relief rod 32 further comprises a guide part 323, and the pressure relief cover 31 is provided with a guide hole 311 matched with the guide part 323. The guide part 323 is in a rod-shaped structure, and through the cooperation of the guide part 323 and the guide hole 311, the guide effect of the movement of the pressure relief rod 32 is realized, so as to avoid the deviation of the pressure relief rod 32.

[0030] The valve body 1 is further provided with a flow guide groove 13, one end of the flow guide groove 13 is communicated with the pressure relief cover 31, the other end of the flow guide groove 13 is communicated with the water outlet interface 112, and a one-way valve 4 is arranged in the flow guide groove 13, so that water can only flow in the direction of the water outlet interface 112 through the one-way valve 4.

[0031] Through the above structure, the flow direction of the liquid is limited. In the ice formation stage, the ice-water mixture enters the pressure relief cover 31 through the pressure relief groove 12; in the ice melting stage, the ice-water mixture flows back to the valve body 1 through the flow guide groove 13. The flow paths of ice formation and ice melting do not interfere with each other, and the pressure relief efficiency is improved.

[0032] Further comprising a pressing plate 5, the pressing plate 5 is clamped between the valve body 1 and the pressure relief cover 31, and the pressing plate 5 is used for preventing the one-way valve 4 from being separated from the flow guide groove 13. The one-way valve 4 is fixed through the cooperation of the pressing plate 5, the valve body 1 and the pressure relief cover 31.

[0033] The reset member is a spring 33, and the spring 33 can quickly drive the pressure relief rod 32 to reset.

[0034] The cross-sectional area of the pressure relief groove 12 is S, the minimum anti-pressure intensity of the pressure relief assembly 3 is P1, and the maximum anti-pressure intensity of the pressure relief assembly 3 is P2.

[0035] When the pressure relief rod 32 blocks the pressure relief groove 12, at this time, the spring 33 is in a first compression length, when the spring 33 is in the first compression length, the force of the spring 33 is in the range of S*P1+2N~S*P1+8N.

[0036] When the pressure relief rod 32 is in the pressure relief groove 12, the spring 33 is in the second compression length, and the force of the spring 33 is in the range of S*P2~S*P2+2N.

[0037] The force of the spring 33 in the first compression length and the second compression length is designed by the cross section of the pressure relief groove 12 and the minimum and maximum compression resistance pressure of the pressure relief assembly 3, so that the valve is gradually opened when the water is frozen and the set pressure is exceeded. At the same time, after the ice water is melted, the spring 33 can effectively push the pressure relief rod 32 to reset and discharge the water to restore the initial sealing state.

[0038] Specifically, the minimum compression resistance pressure P1 is designed to be 1.6 Mpa, the cross section S of the pressure relief groove 12 is 21.22 square millimeters, and according to F=PS, F≈34N, the force of the spring 33 in the first compression length is 36N~42N, and when the water is frozen, the pressure of the valve body 1 is greater than 1.6 Mpa, which drives the spring 33 to compress.

[0039] The maximum compression resistance pressure P2 is designed to be 3.5 Mpa, the cross section S of the pressure relief groove 12 is 21.22 square millimeters, and according to F=PS, F≈74N, the force of the spring 33 in the second compression length is 74N~76N, and when the ice water is melted, the pressure of the valve body 1 is less than 3.5 Mpa, and the spring 33 is automatically reset.

[0040] The ratio of the maximum water volume of the valve body 1 to the maximum water volume of the pressure relief cover 31 is greater than 1:5, and by satisfying the above parameters, when the water in the valve body 1 is all ice, the pressure relief cover 31 has enough space for pressure relief.

[0041] The pressure relief assembly 3, the water inlet interface 111 and the water outlet interface 112 of the valve body 1 are respectively arranged towards the X axis, the Y axis and the Z axis, and the electromagnetic valve head 2 is arranged at the symmetrical position of the water inlet interface 111 or the water outlet interface 112. By reasonably arranging the positions of various parts and the structure of the valve body 1, the mechanical anti-freezing valve of the utility model is beneficial to small design and reduces the space occupation.

[0042] In the description of the utility model, need understanding is, the term "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom" "internal", "external", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and so on indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawing, just for the convenience of describing the utility model and simplifying the description, and not indicate or imply the device or element indicated must have a particular orientation, construct and operate in a particular orientation, therefore can not be understood as the limitation of the utility model.

[0043] In the description of the utility model, the terms "first", "second" are only for the purpose of description, and can not be understood as indicating or implying relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include one or more features.

[0044] The above only is the preferred implementation way of the utility model, and does not limit the utility model, and the utility model can have various changes and changes for the person skilled in the art. Any modification, equivalent replacement, improvement etc. made within the spirit and principle of the utility model should be included in the protection scope of the utility model.

Claims

1. A mechanical anti-freezing valve, comprising a valve body (1) and an electromagnetic valve head (2), an internal part of the valve body (1) is provided with a water passing channel (11), both ends of the water passing channel (11) penetrate through the valve body (1) and respectively form a water inlet interface (111) and a water outlet interface (112), characterized in that: the valve body (1) is further provided with a pressure relief groove (12), the pressure relief groove (12) is in communication with the water passing channel (11); further comprising a pressure relief assembly (3), the pressure relief assembly (3) comprises a pressure relief cover (31) and a pressure relief rod (32), a reset member is arranged between the pressure relief cover (31) and the pressure relief rod (32), and the pressure relief rod (32) is sealingly embedded in the pressure relief groove (12).

2. A mechanical frost valve according to claim 1, wherein: the pressure relief rod (32) comprises a first sealing part (321) and a second sealing part (322), the first sealing part (321) is sleeved with a first sealing ring (34), and the first sealing ring (34) abuts against the pressure relief groove (12); the second sealing part (322) is sleeved with a second sealing ring (35), and the second sealing ring (35) abuts against the inner wall of the pressure relief cover (31).

3. A mechanical frost valve according to claim 2 wherein: the pressure relief rod (32) further comprises a guide part (323), and the pressure relief cover (31) is provided with a guide hole (311) matched with the guide part (323).

4. A mechanical freeze proof valve according to claim 1 wherein: the valve body (1) is further provided with a flow guide groove (13), one end of the flow guide groove (13) is in communication with the pressure relief cover (31), and the other end of the flow guide groove (13) is in communication with the water outlet interface (112).

5. A mechanical frost valve according to claim 4 wherein: a one-way valve (4) is arranged in the flow guide groove (13), and the one-way valve (4) allows water to flow only in the direction of the water outlet interface (112).

6. A mechanical frost valve according to claim 5 wherein: further comprising a pressing plate (5), the pressing plate (5) is clamped between the valve body (1) and the pressure relief cover (31), and the pressing plate (5) is used for preventing the one-way valve (4) from being separated from the flow guide groove (13).

7. A mechanical frost valve according to claim 1 wherein: the reset member is a spring (33).

8. A mechanical frost valve according to claim 7, wherein: the cross-sectional area of the pressure relief groove (12) is S, the minimum pressure resistance of the pressure relief assembly (3) is P1, and the maximum pressure resistance of the pressure relief assembly (3) is P2; when the pressure relief rod (32) blocks the pressure relief groove (12), at this time the spring (33) is at a first compression length, when the spring (33) is at the first compression length, the force of the spring (33) is in the range of S*P1+2N~S*P1+8N; when the pressure relief rod (32) gives way to the pressure relief groove (12), at this time the spring (33) is at a second compression length, when the spring (33) is at the second compression length, the force of the spring (33) is in the range of S*P2~S*P2+2N.

9. A mechanical frost valve according to claim 8 wherein: the ratio of the maximum water volume contained by the valve body (1) to the maximum water volume contained by the pressure relief cover (31) is greater than 1:

5.

10. A mechanical frost valve according to claim 1 wherein: The pressure relief assembly (3) and the water inlet interface (111) and the water outlet interface (112) of the valve body (1) are respectively arranged towards the X-axis, Y-axis and Z-axis directions, and the electromagnetic valve head (2) is arranged at the symmetrical position of the water inlet interface (111) or the water outlet interface (112).

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