CN111207234B - Automatic opening and closing leakage-proof water valve for central heating - Google Patents

Automatic opening and closing leakage-proof water valve for central heating Download PDF

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Publication number
CN111207234B
CN111207234B CN202010094941.1A CN202010094941A CN111207234B CN 111207234 B CN111207234 B CN 111207234B CN 202010094941 A CN202010094941 A CN 202010094941A CN 111207234 B CN111207234 B CN 111207234B
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China
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water outlet
water
piston
switch
inlet
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CN202010094941.1A
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CN111207234A (en
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信众
辛立胜
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Individual
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    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/042—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with locking or disconnecting arrangements
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/044—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with more than one spring
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/06—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure
    • F16K17/065—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with special arrangements for adjusting the opening pressure with differential piston
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K17/00—Safety valves; Equalising valves, e.g. pressure relief valves
    • F16K17/02—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side
    • F16K17/04—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded
    • F16K17/10—Safety valves; Equalising valves, e.g. pressure relief valves opening on surplus pressure on one side; closing on insufficient pressure on one side spring-loaded with auxiliary valve for fluid operation of the main valve
    • F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
    • F16—ENGINEERING ELEMENTS AND UNITS; GENERAL MEASURES FOR PRODUCING AND MAINTAINING EFFECTIVE FUNCTIONING OF MACHINES OR INSTALLATIONS; THERMAL INSULATION IN GENERAL
    • F16K—VALVES; TAPS; COCKS; ACTUATING-FLOATS; DEVICES FOR VENTING OR AERATING
    • F16K37/00—Special means in or on valves or other cut-off apparatus for indicating or recording operation thereof, or for enabling an alarm to be given
    • F16K37/0075—For recording or indicating the functioning of a valve in combination with test equipment
    • F16K37/0091—For recording or indicating the functioning of a valve in combination with test equipment by measuring fluid parameters

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  • Engineering & Computer Science (AREA)
  • General Engineering & Computer Science (AREA)
  • Mechanical Engineering (AREA)
  • Details Of Valves (AREA)

Abstract

The invention relates to the field of heating water valves, in particular to a heating automatic opening and closing leakage-proof water valve, which achieves the effect of continuous automatic opening and closing through a full-mechanical design, so that the water valve can be continuously and circularly opened and closed, a designed pressure comparison mechanism is matched to achieve the purpose of continuously and circularly detecting whether water leakage exists or not, and meanwhile, the water valve can be automatically locked in a closed state when water leakage is detected, so that property loss is avoided. Meanwhile, the opening time and the closing time can be adjusted through the adjusting screw, the time of one cycle is manually set, and the method is more free and personalized.

Description

Automatic opening and closing leakage-proof water valve for central heating
Technical Field
The invention relates to the field of heating water valves, in particular to an automatic opening and closing leakage-proof water valve for a heating.
Background
In winter, the areas north of the Yangtze river in China need heating due to severe cold climate, and most of the areas are heated by water, namely, the areas are heated by hot water in a heating pipeline. The hot-water heating has great hidden danger, receives the influence of factors such as heating pipeline material, the tightness of joint, service life, leads to the phenomenon that the pipeline bursts to appear during the heating. On average, more than 20% of users in each year have the heating burst, and the heating water in the heating pipeline soaks residences of residents, so that huge property loss is caused, and the lives of the residents are seriously influenced. At present, no safety prevention measures are provided for the problems of leakage of a heating pipeline and burst of a heating sheet in a heating system in the society, once the problems occur, a large amount of heating water is lost, the loss is heavy, a resident is flooded with water, and the contradiction between economic loss and neighbors is caused by the fact that downstairs neighbors are affected. Meanwhile, disputes and contradictions of economic loss compensation between users and heating providers are caused, and social stability and settlement are influenced. Countless events occur in heating systems every year nationwide. According to survey and estimation, the economic loss caused by the loss of the heating water flow in China is as high as 20 billion RMB every year, and the waste of fresh water resources is 6 billion tons. The research on a reliable heating installation detection protection device is a technical problem which needs to be solved by the society at present, the heating installation water leakage protection devices which are researched at present all adopt electronic equipment to carry out detection and water leakage prevention protection, firstly need to be electrified when in use, are easy to cause danger when being used on the heating installation mainly based on water circulation, secondly, when accidental power failure occurs, the device cannot work, and if the water leakage condition occurs at the moment, the loss cannot be avoided.
Disclosure of Invention
In order to overcome the problems, the invention provides an automatic water valve for a heating device, which achieves the effect of continuous automatic opening and closing through a full-mechanical design, so that the water valve can be continuously and circularly opened and closed, the continuous circular detection of water leakage can be achieved by matching with a designed pressure comparison mechanism, and meanwhile, the water valve can be automatically locked in a closed state when water leakage is detected, so that property loss is avoided. Meanwhile, the circulating interval time can be manually set, and the method is convenient, rapid and reliable.
The invention is realized by the following technical scheme:
an automatic opening and closing water valve for central heating comprises a water inlet, a water outlet and a switch cavity which are mutually communicated, a lower piston which can move to the switch cavity is arranged between the water inlet and the water outlet, the lower piston is in a closed state when in an initial state, the lower piston isolates the water inlet from the water outlet, meanwhile, the water outlet is isolated from the switch cavity, the lower piston is in an open state when moving into the switch cavity, the water inlet is communicated with the water outlet, it is characterized in that an upper piston is arranged in the switch cavity, the switch cavity is divided into an upper switch cavity and a lower switch cavity which are not communicated by the upper piston, a sealing ring is arranged between the upper piston and the valve body for sealing, the lower switch cavity is communicated with the water inlet, the upper switch cavity is communicated with the water inlet and the water outlet through a water inlet channel outside the switch cavity respectively, and switches are arranged at the communication positions respectively;
an upper spring is arranged in the upper switch cavity, two ends of the upper spring are respectively connected with the inner wall of the valve body at the top of the upper switch cavity and the upper piston, a lower spring is arranged in the lower switch cavity, two ends of the lower spring are respectively connected with the upper piston and the lower piston, and the elastic coefficient of the upper spring is greater than that of the lower spring;
the water outlet is communicated with the pressure comparison mechanism;
the bottom of the lower piston is connected with a limiting mechanism;
the lower end of the limiting rod is connected with the lower piston, the upper end of the limiting rod penetrates through the upper piston to the upper switch cavity, so that the upper piston can move along the limiting rod, an upper limiting block and a lower limiting block are arranged at the upper part of the limiting rod, the upper limiting block is positioned in the upper switch cavity, and the lower limiting block is positioned in the lower switch cavity;
the switch at the communication part of the channel and the water inlet is a water inlet switch, the switch at the communication part of the channel and the water outlet is a water outlet switch, the water inlet switch is closed and the water outlet switch is opened in the closed state, and the water inlet switch is opened and the water outlet switch is closed in the open state;
the water inlet switch comprises a water inlet rotating shaft and a water inlet impact plate, the water inlet impact plate is fixedly connected with the water inlet rotating shaft and can rotate along the rotating shaft, a water inlet rotating shaft through hole penetrating through the water inlet rotating shaft is formed in the water inlet rotating shaft, the water inlet impact plate naturally sags when the water inlet impact plate is in a closed state, the water inlet rotating shaft through hole is not communicated with the channel, and the water inlet rotating shaft through hole is communicated with the channel when the water inlet impact plate is in an open state;
the water outlet switch comprises a water outlet rotating shaft and a water outlet impact plate, the water outlet impact plate is fixedly connected with the water outlet rotating shaft and can rotate along the rotating shaft, a water outlet rotating shaft through hole penetrating through the water outlet rotating shaft is formed in the water outlet rotating shaft, the water outlet impact plate naturally sags in a closed state, the water outlet rotating shaft through hole is communicated with the channel, and the water outlet rotating shaft through hole is not communicated with the channel in an open state;
return springs are arranged in the water inlet rotary switch and the water outlet rotary switch, and the two return springs are in a loose state when the water inlet rotary switch and the water outlet rotary switch are closed;
the water inlet adjusting screw is movably connected with the valve body, and the water inlet adjusting screw penetrates through the valve body and extends out of the valve body;
a water outlet adjusting screw for adjusting the inner diameter of the water outlet channel is arranged in the water outlet channel, the water outlet adjusting screw is movably connected with the valve body, and the water outlet adjusting screw penetrates through the valve body and extends out of the valve body;
the limiting mechanism comprises a connecting rod, the upper end of the connecting rod is connected with the lower piston, the lower end of the connecting rod extends out of the valve body, an upper limiting groove and a lower limiting groove are formed in the connecting rod, a corresponding steel ball groove is formed in the inner side of the valve body, a steel ball spring and a steel ball are arranged in the steel ball groove, the steel ball is arranged in the upper limiting groove under the pressure of the steel ball spring in a closed state, and the steel ball is arranged in the lower limiting groove under the pressure of the steel ball spring in an open state;
the valve body is provided with a valve seat, a valve rod is arranged in the valve seat, a valve rod groove is arranged in the valve seat, a valve rod is arranged in the valve rod groove, a steel ball adjusting screw is arranged in the steel ball groove, the steel ball adjusting screw is movably connected with the valve body, one end of the steel ball adjusting screw is connected with a steel ball spring, and the other end of the steel ball adjusting screw extends out of the valve body;
the pressure comparison mechanism comprises a comparison cavity, a comparison piston, a locking pin and a comparison spring, the comparison cavity is communicated with the water outlet, the comparison piston is arranged in the comparison cavity, one end of the comparison piston is connected with the locking pin, the other end of the comparison piston is connected with the comparison spring, the locking groove is formed in the limiting mechanism, when the pressure comparison mechanism is in a closed state, the locking pin is aligned with the locking groove, the comparison spring compares the elastic force provided by the comparison piston with the pressure of the water outlet and equals to the pressure of the water outlet, when the pressure is reduced due to leakage on one side of the water outlet, the pressure in the comparison cavity is smaller than the pressure of the comparison spring, the comparison spring presses the comparison piston into the comparison cavity, the locking pin is inserted into the locking groove, the lower piston is fixed in the closed state, the lower piston is prevented from moving to the open state, and water leakage is prevented.
The invention has the beneficial effects that: (1) automatic opening and closing circulation is realized, automatic circulation leakage detection in fixed time is realized by matching with a pressure comparison mechanism, and the leakage is automatically locked to a closed state when the leakage occurs, so that property loss caused by continuous leakage is avoided; (2) the opening time and the closing time can be adjusted through the adjusting screw, so that the time for manually setting a cycle is reached, and the freedom and individuation are realized; (3) the design of the full mechanical mechanism avoids the problem of electric leakage possibly caused by the use of electronic elements, and is safer and more reliable.
Drawings
Fig. 1 is a structural diagram of the present application.
Fig. 2 is a sectional structural view of the closed state of the present application.
Fig. 3 is a sectional view of the closed state in embodiment 2 of the present application.
In the figure, 1, a connecting rod, 2, a water inlet, 3, a switch cavity, 4, a water inlet adjusting screw, 5, a water outlet adjusting screw, 6, a water outlet, 7, a valve body, 8, a steel ball adjusting screw, 9, a steel ball spring, 10, a water inlet rotary switch, 11, a lower spring, 12, a lower switch cavity, 13, a water inlet channel, 14, an upper switch cavity, 15, a sealing ring, 16, an upper piston, 17, a water outlet channel, 18, a lower piston, 19, a water outlet rotary switch, 20, a locking pin, 21, a comparison spring, 22, a comparison piston, 23, a comparison cavity, 24, a locking groove, 25, an upper limiting groove, 26, a lower limiting groove, 27, a steel ball, 28, a steel ball groove, 29, an upper spring, 30, an upper limiting block, 31, a limiting rod, 32 and a lower limiting block.
Detailed Description
The invention is further illustrated below with reference to the figures and examples.
Example 1
As shown in fig. 1 and 2, the automatic water valve for heating installation comprises a valve body 7, wherein a water inlet 2 and a water outlet 6 which are mutually communicated are arranged in the valve body 7, the valve body 7 is arranged on a water inlet pipeline of the heating installation, the water inlet 2 is connected with one water inlet end, the water outlet 6 is connected with one end of the heating installation, and under the ordinary condition, due to the heating design of the heating installation, the pressure of the water inlet end is greater than that of the one end of the heating installation, so that continuous water circulation is ensured. A switch cavity 3 extending vertically upwards is arranged between the water inlet 2 and the water outlet 6, a lower piston 18 capable of vertically moving upwards into the switch cavity 3 is arranged at the position where the three cavities are communicated, when the water valve is in a closed state, the lower piston 18 isolates the water inlet 2 from the water outlet 6, water flow is interrupted, and a gap is left between the lower piston 18 and the water inlet 2 to enable the lower piston 18 and the switch cavity 3 to be in a communicated state.
An upper piston 16 which can vertically move along the switch cavity 3 is arranged in the switch cavity 3, a sealing ring 15 is arranged around the upper piston 16 and hermetically divides the switch cavity 3 into an upper switch cavity 14 at the upper part and a lower switch cavity 12 at the lower part, the lower switch cavity 12 is a cavity communicated with the water inlet 2, and the upper switch cavity 14 is a closed cavity. Two water through holes are formed in the upper portion of the upper switch cavity 14, one water through hole is communicated to the water inlet 2 through a water inlet channel 13 arranged on the outer side of the switch cavity 3, the other water through hole is communicated to the water outlet 6 through a water outlet channel 17 also arranged on the outer side of the switch cavity 3, a water inlet rotary switch 10 is installed at the communication position of the water inlet channel 13 and the water inlet 2, the water inlet rotary switch 10 is structurally a rotary shaft capable of blocking the water inlet channel 13 and rotating along the radial direction of the water inlet 2, an impact plate is connected below the rotary shaft and naturally droops at the cross section of the water inlet 2 when the water valve is in a closed state, a through hole penetrating through the rotary shaft is formed in the rotary shaft, and when the water valve is in the closed state, the through hole is not communicated with the water inlet channel 13. When the water valve is in an open state, water flow continuously passes through the water inlet 2, the impact plate swings towards the water flow direction under the impact of the water flow, at the moment, the rotating shaft rotates to the through hole to be communicated with the water inlet channel 13, namely, the water inlet 2 is communicated with the upper switch cavity 14 through the water inlet channel 13; similarly, the outlet rotary switch 19 is also arranged at the communication position of the outlet channel 17 and the water outlet 6, the basic structure of the outlet rotary switch 19 is the same as that of the inlet rotary switch 10, and the difference is that the through hole is communicated with the outlet channel 17 in the closed state and is not communicated with the outlet channel 17 in the open state. The water inlet rotary switch and the water outlet rotary switch can be respectively provided with a spring, the adjusting spring is in a loose state when in a closed state, and is in a compressed state when in an open state, so that the two rotary switches can be helped to reset.
The water inlet adjusting screw 4 for adjusting the inner diameter of the water inlet channel 13 is also arranged in the water inlet channel 13, the sleeping adjusting screw penetrates through one end of the valve body 7 and is arranged outside the valve body 7 and is in sealed threaded connection with the valve body 7, the length of the part extending into the water inlet channel 13 can be adjusted by rotating the water inlet adjusting screw 4, and the effect of adjusting the inner diameter of the water inlet channel 13 is achieved, namely the water flow through quantity of the water inlet channel 13 is adjusted; likewise, symmetrical outlet adjusting screws 5 are also provided on the side of the outlet channel 17 for adjusting the outlet throughput.
An upper spring 29 is arranged in the upper switch cavity 14, the upper end of the upper spring 29 is connected with the inner wall of the valve body 7, the lower end is connected with the top end of the upper piston 16, and in a closed state, the upper spring 29 is in a loose state. A lower spring 11 is disposed in the lower switch chamber 123, the upper end of the lower spring 11 is connected to the bottom of the upper piston 16, the lower end is connected to the top of the lower piston 18, and the elastic coefficient of the upper spring 29 should be greater than that of the lower spring 11. In the closed state, the lower spring 11 is also in a relaxed state.
The bottom of the lower piston 18 is connected with a connecting rod 1 which is vertically downward and one end of which extends out of the bottom of the valve body 7, one side of the connecting rod 1 is respectively provided with an upper limiting groove and a lower limiting groove, when the connecting rod is in a closed state, the valve body 7 at the corresponding position of the upper limiting groove 25 is provided with a corresponding steel ball groove 28, and the corresponding steel ball spring 9 and the steel ball 27 are arranged in the steel ball groove 28, so that the steel ball 27 is pressed into the upper limiting groove 25 by the steel ball spring 9 to provide pressure. The steel ball groove 28 is also internally provided with a steel ball adjusting screw 8 for adjusting the compression degree of the steel ball spring 9, one end of the steel ball adjusting screw 8 is tightly pressed on the steel ball spring 9, the other end of the steel ball adjusting screw 8 extends out of the valve body 7 and is in threaded connection with the valve body 7, and the compression degree of the steel ball spring 9, namely the pressure of the steel ball spring 9 on the steel ball 27, can be adjusted by rotating the steel ball adjusting screw 8.
The other side of the connecting rod 1 is provided with a locking groove 24, in a closed state, a comparison cavity 23 is arranged on the valve body 7 at a position corresponding to the locking groove 24, the comparison cavity 23 is communicated with the water outlet 6 through a comparison channel, a comparison piston 22 capable of moving left and right is arranged in the comparison cavity 23, one end of the comparison piston 22 is connected with a locking pin 20, the locking pin 20 is right aligned with the locking groove 24, the other end of the comparison piston 22 is connected with a comparison spring 21, in a normal state, the comparison piston 22 does not influence the communication between the comparison cavity 23 and the water outlet 6, therefore, the pressure in the comparison cavity 23 is the same as that of the water outlet 6, and the comparison spring 21 is set to be equal to that of the comparison piston 22 and that of the water outlet 6.
Due to the pressure of the water flow, the lower piston 18 can be arranged to be connected with the inclined surface of the water outlet 6, so that the pressure of the water can be completely dredged to the connecting surface, and the sealing is more excellent in the closed state.
The working principle of the water valve is as follows: in a normal state, the water valve is in a closed state in an initial state, water flows into the water inlet 2 from the water inlet pipe of the heater and flows into the lower switch cavity 12 through a reserved passage at the lower piston 18, at this time, the pressure of the lower switch cavity 12 is the same as that of the water inlet 2, at this time, the pressure of the upper switch cavity 14 is the same as that of the water outlet 6 as the inlet rotary switch is in a closed state and the outlet rotary switch is in an open state as the inlet rotary switch is in a closed state, at this time, the pressure difference causes the upper piston 16 to start moving upwards as the pressure of the water inlet 2 is higher than that of the water outlet 6 as the heater is designed, namely, at this time, the pressure of the lower switch cavity 12 is higher than that of the upper switch cavity 14, and the water in the upper switch cavity 14 is squeezed out through the water outlet channel 17, and the upper spring 29 is compressed to accumulate energy and the lower spring 11 is stretched to provide upward pulling force to the lower piston 18, but as the lower piston 18 is limited by the steel ball 27 matched with the upper limiting groove 25 of the connecting rod 1, the lower piston 18 cannot move upwards and the lower spring 11 continues to be stretched and accumulates energy.
When the lower spring 11 is continuously extended until the pull on the lower piston 18 is sufficient to oppose the resistance provided by the steel ball to the lower retaining groove 26, the steel ball 27 is pressed into the steel ball groove 28 by the lower connecting rod 1, the connecting rod 1 loses resistance and can move upwards, that is, the lower piston 18 can move upwards, the lower spring 11 returns and pulls the lower piston 18 to move downwards rapidly in the switch cavity 123, when the lower limit groove 26 is moved to be aligned with the steel ball, because the lower spring 11 has returned to a certain degree, the provided tension is not enough to resist the pressure of the steel ball to the lower limit groove 26, the steel ball is pressed into the lower limit groove 26, so that the connecting rod 1 can not move due to the resistance, that is, the lower piston 18 stops moving, at this time, the lower piston 18 is located in the lower switch cavity 12, the water inlet 2 is communicated with the water outlet 6, water flows through, the water valve is in an open state, and at this time, the pressure in the lower switch cavity 12 is still larger than that in the upper switch cavity 14. At this time, because the water flow passes through, the impact plates of the water inlet rotary switch 10 and the water outlet rotary switch 19 are both rotated along the water flow direction under the impact of the water flow, and according to different directions of the through holes in the switch rotating shafts, the water inlet rotary switch 10 is rotated until the through holes are communicated with the water inlet channel 13, the water outlet rotary switch 19 is rotated until the through holes are communicated with the water outlet channel 17, namely, the water inlet 2 is communicated with the upper switch cavity 14 through the water inlet channel 13 at this time, and the water outlet 6 is not communicated with the upper switch cavity 14. At this time, the pressure in the upper switch chamber 14 is the same as the water inlet 2, that is, the water pressure in the upper switch chamber 14 is the same as the water pressure in the lower switch chamber 12, and the upper piston 16 is pushed downward by the upper spring 29, so that the upper piston 16 starts to be pushed downward, and due to the incompressibility of water, water needs to be supplemented when the upper piston 16 moves downward, that is, water needs to flow into the upper switch chamber 14 from the water inlet 2 through the water inlet channel 13, so the movement speed of the upper piston 16 depends on the inflow speed of water. When the upper piston 16 moves downwards, the upper piston 16 compresses the lower spring 11, the steel ball is pressed into the steel ball groove 28 when the lower spring 11 is compressed enough to resist the pressure of the steel ball on the lower limit groove 26, so that the resistance of the connecting rod 1 is lost, the lower piston 18 is pushed to move downwards under the return action of the lower spring 11 until the steel ball is aligned with the upper limit groove 25, the steel ball is pressed into the upper limit groove 25 again, and the water valve returns to the original closed state. At this time, the lower piston 18 returns to block the water inlet 2 and the water outlet 6, water flow does not flow, the water inlet rotary switch 10 and the water outlet rotary switch 19 losing water flow impact force are both restored to the original positions, namely the water inlet 2 is not communicated with the upper switch cavity 14, the water outlet 6 is communicated with the upper switch cavity 14, at this time, the upper switch cavity 14 is restored to be communicated with the water outlet 6, namely the initial position state, the water valve enters the next switch cycle, and at this time, the water valve completes a complete switch cycle.
In order to achieve the above effect, the elasticity of the upper spring 29 and the lower spring 11 and the depth of the upper limiting groove 25 and the lower limiting groove 26 need to be matched through multiple tests, and it is usually necessary to set the elastic coefficient of the upper spring 29 to be larger than that of the lower spring 11, so that the pressure provided by the upper spring 29 is larger than that of the lower spring 11 under the condition that the moving distance of the upper piston 16 is the same. The pressure of the steel ball 27 on the limiting groove can be achieved by adjusting the compression degree of the steel ball spring 9 through adjusting the steel ball adjusting screw 8.
In a normal state, the water valve repeats the circulation to perform reciprocating switching, and the adjusting screw 4 for water inflow can adjust the inner diameter of the water inflow channel 13, namely the speed of water flowing into the upper switching cavity 14 through the water inflow channel 13, so as to adjust the downward movement speed of the upper piston 16, namely the speed of the water valve in an open state; adjusting the outlet adjustment screw adjusts the internal diameter of the outlet passage, i.e., the rate at which water flows out of the upper switch chamber 14 through the outlet passage, to adjust the rate at which the upper piston 16 moves upwardly, i.e., the rate at which the water valve is in the closed state.
When the heating leaks, the water valve is in the open state and is the same as the ordinary state, when the water valve is in the closed state, due to leakage, the pressure of the water outlet 6 connected with the heating is smaller than the pressure in the ordinary state, namely the pressure of the comparison cavity 23 communicated with the water outlet 6 is smaller than the ordinary state, the elastic force of the comparison spring 21 is set to be the same as the pressure of the water outlet 6 in the ordinary state, namely when the water valve leaks, the elastic force of the comparison spring 21 is larger than the pressure of the comparison cavity 23, the comparison spring 21 pushes the comparison piston 22 towards the direction of the connecting rod 1, so that the locking pin 20 is pushed into the corresponding locking groove 24, the connecting rod 1 is prevented from moving upwards again, the water valve cannot enter the next open state, and continuous leakage is avoided.
Example 2
The other structure is the same as in example 1 except for the following differences:
as shown in fig. 3, the upper piston 16 can also be designed into an "i" shape with two openings, a limiting rod 31 is vertically installed through the upper piston 16, the bottom end of the limiting rod 31 is connected with the lower piston 18, the upper part of the limiting rod 31 is respectively provided with two protruding upper limiting blocks 30 and lower limiting blocks 32, the upper limiting block 30 is arranged in the opening on the upper part of the upper piston 16, namely in the upper switch cavity 14, the lower limiting block 32 is arranged in the opening on the lower part of the upper piston 16, namely in the lower switch cavity 12, when the upper piston 16 moves upwards, the upper limiting block 30 moves firstly as described in embodiment 1, when the upper limiting block 30 is contacted by the upper piston 16, the lower piston 18 is limited and cannot move, at this time, the upper piston 16 is limited by the upper limiting block 30, cannot rise continuously, and energy is accumulated, until the water pressure in the lower switch cavity 12 is enough to overcome the limited resistance of the lower piston, the lower piston 18 is separated from the limit, and the accumulated energy is released at the moment to drive the lower piston 18 to move upwards quickly to reach an opening state; similarly, in the process of releasing the elastic force of the upper spring 29, the upper piston 16 descends to contact and be limited by the lower limiting block 32 until the limiting resistance of the lower piston 18 is overcome again, and the lower piston 18 is driven to rapidly move downwards to the closed state. The arrangement of the limiting rod 31 can help the lower piston 18 to move rapidly when being opened or closed, so that the purpose of rapidly switching the water valve state is achieved.

Claims (10)

1. A heating water valve comprises a valve body (7), wherein the valve body (7) is arranged on a heating water inlet pipe, a water inlet (2), a water outlet (6) and a switch cavity (3) which are communicated with each other are arranged in the valve body (7), the water inlet (2) is communicated with the heating water inlet pipe, the water outlet (6) is communicated with heating water, a lower piston (18) which can move towards the switch cavity (3) is arranged between the water inlet (2) and the water outlet (6), the lower piston (18) is in a closed state when being positioned between the water inlet (2) and the water outlet (6), the lower piston (18) isolates the water inlet (2) from the water outlet (6) and simultaneously isolates the water outlet (6) from the switch cavity, the lower piston (18) is in an open state when moving into the switch cavity (3), and the water inlet (2) is communicated with the water outlet (6), the heating water valve is characterized in that an upper piston (16) is arranged in the switch cavity (3), the upper piston (16) divides the switch cavity into an upper switch cavity (14) and a lower switch cavity (12) which are not communicated with each other, the lower switch cavity (12) is communicated with the water inlet (2), the upper switch cavity (14) is respectively communicated with the water inlet (2) and the water outlet (6) through a water inlet channel (13) outside the switch cavity (3), and switches are respectively arranged at the communicated positions;
an upper spring (29) is arranged in the upper switch cavity (14), two ends of the upper spring (29) are respectively connected with the inner wall of the valve body (7) at the top of the upper switch cavity (14) and the upper piston (16), a lower spring (11) is arranged in the lower switch cavity (12), two ends of the lower spring (11) are respectively connected with the upper piston (16) and the lower piston (18), and the elastic coefficient of the upper spring (29) is greater than that of the lower spring (11);
the water outlet (6) is communicated with the pressure comparison mechanism;
the bottom of the lower piston (18) is connected with a limiting mechanism, and the limiting mechanism can be switched between a closing state and an opening state correspondingly.
2. The heating water valve as claimed in claim 1, further comprising a limiting rod (31), wherein the lower end of the limiting rod (31) is connected with the lower piston (18), the upper end of the limiting rod passes through the upper piston (16) and into the upper switch cavity (14) so that the upper piston (16) can move along the limiting rod (31), an upper limiting block (30) and a lower limiting block (32) are arranged on the upper portion of the limiting rod (31), the upper limiting block (30) is located in the upper switch cavity (14), and the lower limiting block is located in the lower switch cavity (12).
3. The heating water valve according to claim 1, wherein the switch at the communication between the water inlet channel and the water inlet (2) is a water inlet rotary switch (10), the switch at the communication between the water outlet channel and the water outlet (6) is a water outlet rotary switch (19), in the closed state, the water inlet rotary switch (10) is closed, the water outlet rotary switch (19) is opened, in the open state, the water inlet rotary switch (10) is opened, and the water outlet rotary switch (19) is closed.
4. A heating water valve according to claim 3, wherein the inlet rotary switch (10) comprises an inlet rotary shaft and an inlet impact plate, the inlet impact plate is fixedly connected with the inlet rotary shaft and can rotate along the rotary shaft, the inlet rotary shaft is internally provided with an inlet rotary shaft through hole penetrating through the inlet rotary shaft, the inlet impact plate naturally sags in a closed state, the inlet rotary shaft through hole is not communicated with the channel, and the inlet rotary shaft through hole is communicated with the inlet channel (13) in an open state;
the water outlet rotary switch (19) comprises a water outlet rotary shaft and a water outlet impact plate, the water outlet impact plate is fixedly connected with the water outlet rotary shaft and can rotate along the rotary shaft, a water outlet rotary shaft through hole penetrating through the water outlet rotary shaft is formed in the water outlet rotary shaft, the water outlet impact plate naturally sags when in a closed state, the water outlet rotary shaft through hole is communicated with the water outlet channel (17), and the water outlet rotary shaft through hole is not communicated with the water outlet channel (17) when in an open state.
5. A heating water valve according to claim 4, characterized in that return springs are arranged in the inlet rotary switch (10) and the outlet rotary switch (19), and in the closed state, both return springs are in a relaxed state.
6. The heating water valve as claimed in any one of claims 1 to 5, wherein a water inlet adjusting screw (4) for adjusting the inner diameter of the water inlet passage (13) is arranged in the water inlet passage (13), the water inlet adjusting screw (4) is movably connected with the valve body (7), and the water inlet adjusting screw (4) penetrates through the valve body (7) and extends out of the valve body (7);
the water outlet adjusting screw (5) used for adjusting the inner diameter of the water outlet channel (17) is arranged in the water outlet channel (17), the water outlet adjusting screw (5) is movably connected with the valve body (7), and the water outlet adjusting screw (5) penetrates through the valve body (7) and extends out of the valve body (7).
7. The heating water valve as claimed in claim 1, wherein the limiting mechanism comprises a connecting rod (1), the upper end of the connecting rod (1) is connected with the lower piston (18), the lower end of the connecting rod extends out of the valve body (7), an upper limiting groove (25) and a lower limiting groove (26) are arranged on the connecting rod (1), a corresponding steel ball groove (28) is arranged on the inner side of the valve body (7), a steel ball spring (9) and a steel ball (27) are arranged in the steel ball groove (28), the steel ball (27) is arranged in the upper limiting groove (25) under the pressure of the steel ball spring (9) in the closed state, and the steel ball (27) is arranged in the lower limiting groove (26) under the pressure of the steel ball spring (9) in the open state.
8. The heating water valve as claimed in claim 7, wherein a steel ball adjusting screw (8) is further arranged in the steel ball groove (28), the steel ball adjusting screw (8) is movably connected with the valve body (7), one end of the steel ball adjusting screw (8) is connected with the steel ball spring (9), and the other end of the steel ball adjusting screw extends out of the valve body (7).
9. The heating water valve as claimed in claim 1, wherein the pressure comparison mechanism comprises a comparison chamber (23), a comparison piston (22), a locking pin (20) and a comparison spring (21), the comparison chamber (23) is communicated with the water outlet (6), the comparison piston (22) is arranged in the comparison chamber (23), one end of the comparison piston (22) is connected with the locking pin (20), the other end of the comparison piston is connected with the comparison spring (21), a locking groove (24) is formed in the limiting mechanism, when the limiting mechanism is in a closed state, the locking pin (20) is aligned with the locking groove (24), and the elastic force provided by the comparison piston (22) by the comparison spring (21) is equal to the pressure of the water outlet (6).
10. A heating water valve according to claim 1 or 2, characterised in that a sealing ring (15) is arranged between the upper piston (16) and the switching chamber (3).
CN202010094941.1A 2020-02-17 2020-02-17 Automatic opening and closing leakage-proof water valve for central heating Expired - Fee Related CN111207234B (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
CN202010094941.1A CN111207234B (en) 2020-02-17 2020-02-17 Automatic opening and closing leakage-proof water valve for central heating

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
CN202010094941.1A CN111207234B (en) 2020-02-17 2020-02-17 Automatic opening and closing leakage-proof water valve for central heating

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Publication Number Publication Date
CN111207234A CN111207234A (en) 2020-05-29
CN111207234B true CN111207234B (en) 2022-04-01

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CN202010094941.1A Expired - Fee Related CN111207234B (en) 2020-02-17 2020-02-17 Automatic opening and closing leakage-proof water valve for central heating

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
CA2010074C (en) * 1989-03-29 2001-02-13 Gilbert Roland Farnham Valve assembly
CH683803A5 (en) * 1990-05-18 1994-05-13 Hobac S A automatic control valve.
CN101038041A (en) * 2006-03-17 2007-09-19 北京中科信电子装备有限公司 Inflating overpressure spill valve for vacuum
WO2009035926A2 (en) * 2007-09-13 2009-03-19 John Leslie Johnson Double action directional fluid flow valve
CN102032371A (en) * 2009-09-27 2011-04-27 浙江艾默樱零部件有限公司 Constant flow valve
CN202432045U (en) * 2011-09-26 2012-09-12 西安热工研究院有限公司 Overflow valve possessing novel leakproof structure
CN105286626B (en) * 2015-11-17 2017-06-30 珠海双喜电器股份有限公司 A kind of spring multi-gear adjustable presses pressure limiting valve

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