CN111174273A - Expansion tank and dual-purpose furnace using same - Google Patents
Expansion tank and dual-purpose furnace using same Download PDFInfo
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- CN111174273A CN111174273A CN202010053703.6A CN202010053703A CN111174273A CN 111174273 A CN111174273 A CN 111174273A CN 202010053703 A CN202010053703 A CN 202010053703A CN 111174273 A CN111174273 A CN 111174273A
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- F—MECHANICAL ENGINEERING; LIGHTING; HEATING; WEAPONS; BLASTING
- F24—HEATING; RANGES; VENTILATING
- F24D—DOMESTIC- OR SPACE-HEATING SYSTEMS, e.g. CENTRAL HEATING SYSTEMS; DOMESTIC HOT-WATER SUPPLY SYSTEMS; ELEMENTS OR COMPONENTS THEREFOR
- F24D19/00—Details
Abstract
The invention relates to an expansion water tank and a dual-purpose furnace using the same, wherein the expansion water tank comprises a middle shell, a middle shell and a plurality of expansion water tanks, wherein the middle shell comprises an annular ring and a plate body integrally connected with the annular ring; the leather membrane comprises a first leather membrane and a second leather membrane, and the first leather membrane and the second leather membrane are respectively arranged on two sides of the annular ring; the cover shell comprises a first cover shell and a second cover shell, the first cover shell is arranged on the outer side of the first leather membrane and jointly encloses a first cavity, and the second cover shell is arranged on the outer side of the second leather membrane and jointly encloses a second cavity; the edge of the annular ring close to the first membrane is connected with the plate body, so that the opening of the middle shell faces the second membrane, the first membrane and the plate body jointly enclose a third cavity, and the second membrane and the middle shell jointly enclose a fourth cavity. According to the invention, the plate body is arranged on the annular ring, and the third cavity (bathing water cavity) and the fourth cavity (heating water cavity) are separated by the rigid plate body, so that the bathing water pressure and the heating water pressure cannot be interfered with each other.
Description
Technical Field
The invention belongs to the field of dual-purpose furnaces, and particularly relates to an expansion water tank and a dual-purpose furnace using the same.
Background
In a high-rise housing, the condition that water pressure and water pressure of a user are unstable frequently occurs, and the water flow is suddenly and suddenly reduced as a result, so that when a gas water heater is used, the phenomenon that the water temperature is suddenly cooled and suddenly heated frequently occurs due to the limited constant temperature performance of the water heater, and the comfort of bathing is seriously influenced. It has been analyzed that the addition of an expansion tank to a hot water plant can mitigate this water volume fluctuation. The reason why the expansion tank has the function of buffering water fluctuation is that: when the water pressure of the pipeline is too high, the expansion water tank is in a state of absorbing water flow, so that the water flow entering the water heater is divided, and when the water pressure is increased, the water outlet quantity of the water heater is kept unchanged basically within a certain time. When the water pressure in the pipeline is too low, the expansion tank is in a drainage state, and thus, the expansion tank and the water entering the water heater are combined, so that the water yield of the water heater can be basically unchanged within a certain time even if the water pressure is reduced. However, the use of the expansion tank may result in an oversized machine volume, and for a dual-purpose stove of a closed heating loop, it is necessary to have an expansion tank for balancing the water pressure of the heating loop, so that the expansion tank for bathing and the expansion tank for the heating loop can be combined to obtain a dual-purpose expansion tank, as disclosed in "an expansion tank" of the utility model with the publication number of 201720925341.9 (publication number of 206959139U), the expansion tank includes a cover shell and a skin, the cover shell includes a first cover shell and a second cover shell, the skin includes a first skin and a second skin, the expansion tank further includes a gasket, the first skin and the second skin are respectively disposed at two sides of the gasket and form a second cavity together with the gasket, the first cover shell is disposed at the outer side of the first skin and forms a first cavity together with the first skin, the second cover shell is arranged on the outer side of the second skin membrane and is enclosed with the second skin membrane to form a third cavity, the first cavity can be communicated with a heating pipeline, the second cavity is communicated with a domestic water pipeline, and the third cavity is communicated with a balance air source so as to meet the requirements of the heating pipeline and the domestic water pipeline, reduce the water pressure fluctuation of heating and domestic water and improve the water flow stability.
However, the expansion tank has many problems when applied to a dual-purpose furnace: 1. the first cavity is communicated with a heating pipeline, the second cavity is communicated with a domestic water pipeline, the third cavity is communicated with a balanced air source, the first cavity and the second cavity are separated by a first diaphragm, but the first diaphragm is made of rubber materials with better elasticity and mechanical property, so that the water pressure of a heating loop and the water pressure of a bathing water channel can interfere with each other; 2. although the oblate expansion water tank is simple in structure and arrangement, the pressure-bearing performance is limited, generally 0.4MPa, and the oblate expansion water tank cannot bear the possible high pressure of 1.5MPa of a bathing waterway.
Disclosure of Invention
The first technical problem to be solved by the invention is to provide an expansion water tank which avoids mutual interference of water pressure of a heating loop and a bathing waterway aiming at the current situation of the prior art.
The second technical problem to be solved by the invention is to provide an expansion water tank which can avoid the continuous pressure rise when the pressure of a bathing waterway is higher, aiming at the current situation of the prior art.
The third technical problem to be solved by the invention is to provide a dual-purpose stove applying the expansion water tank, which avoids mutual interference of water pressure of a heating loop and a bathing waterway, aiming at the current situation of the prior art.
The technical scheme adopted by the invention for solving the first technical problem is as follows: an expansion tank comprises
A middle housing comprising an annular ring;
the leather membrane comprises a first leather membrane and a second leather membrane, and the first leather membrane and the second leather membrane are respectively arranged on two sides of the annular ring;
the cover shell comprises a first cover shell and a second cover shell, the first cover shell is arranged on the outer side of the first leather membrane and encloses a first cavity together with the first leather membrane, and the second cover shell is arranged on the outer side of the second leather membrane and encloses a second cavity together with the second leather membrane;
the middle shell is characterized by further comprising a plate body integrally connected with the annular ring, the edge of the annular ring, close to the first membrane, is connected with the plate body, so that the opening of the middle shell faces the second membrane, the first membrane and the plate body jointly enclose a third cavity, and the second membrane and the middle shell jointly enclose a fourth cavity.
Because the involucra is soft material, be not convenient for link to each other with first body and second body, so locate annular circle with first body and second body, in order to make domestic water (like the bathing water) and heating water can enter into third cavity and fourth cavity respectively, be equipped with first body and the second body that communicates with fourth cavity along circumference interval on the perisporium of annular circle, be equipped with the valve body in the fourth cavity, seted up the runner in the valve body, the water inlet of this runner and first body fluid intercommunication, set up the first hole of crossing that communicates with the delivery port of runner corresponds on the plate body that link up its wall thickness. Therefore, the bathing water flows into the third cavity through the first pipe body and the valve body, and the heating water flows into the fourth cavity through the second pipe body.
The technical scheme adopted by the invention for solving the second technical problem is as follows: the flow channel is composed of at least two sections of flow channel units which are mutually communicated, wherein a first flow channel unit is connected with the water outlet, a second water passing hole which is arranged at an interval with the first water passing hole is arranged on the plate body, a second water passing hole which is communicated with the second water passing hole and the first flow channel unit is arranged on the side wall of the valve body, and a first valve component which can block the outlet of the first flow channel unit under the action of water flow entering from the second water passing hole is arranged between the first flow channel unit and the water outlet.
The first valve assembly can have various structural forms, and preferably, the first valve assembly comprises
The first valve rod can move along the axial direction of the first flow channel unit, a first blocking part capable of blocking an outlet of the first flow channel unit is arranged on the circumferential wall of the first valve rod along the radial direction, and the first blocking part is positioned outside the first flow channel unit;
the first elastic piece acts on the first valve rod to enable the first blocking part to keep the trend of opening the outlet of the first flow channel unit;
and the sealing parts comprise a first sealing part and a second sealing part which are arranged on the peripheral wall of the first valve rod along the radial direction and are in sealing contact with the inner wall of the first flow channel unit along the peripheral edge, and the first sealing part and the second sealing part are arranged along the axial direction of the first valve rod at intervals and are respectively positioned at two sides of the second water passing port. When the water pressure in the bathing loop is increased, water in the third cavity enters the first flow channel unit from the second water passing port, and the second water passing port is positioned between the first sealing part and the second sealing part, so that water flow can be accumulated between the first sealing part and the second sealing part.
The first sealing part can have various structural forms, and preferably comprises a first piston formed on the outer peripheral wall of the first valve rod along the radial direction and a first sealing ring arranged on the first piston in a surrounding mode, and the first sealing ring plays a role in sealing; the second sealing portion may have various structures, and preferably, the second sealing portion includes a second piston formed on the outer peripheral wall of the first valve stem in the radial direction, and a second sealing ring surrounding the second piston, and the second sealing ring plays a role in sealing.
In order to adjust the precompression amount of the first elastic member to realize the feedback of the first valve assembly to different bath water pressures, the expansion tank further comprises a valve seat which passes through the peripheral wall of the annular ring and is detachably inserted in the first flow passage unit, the first elastic member is a spring, and two ends of the first elastic member respectively abut against the second sealing part and the valve seat. Thus, the compression amount of the first elastic member is changed by adjusting the depth of the valve seat inserted into the first flow passage unit.
In order to enable the water pressure at the first pipe body to be recovered to be normal, the first valve component can be reset to an initial state, one section of the first pipe body located at the upstream of the first flow channel unit is a second flow channel unit along the water flow direction of the third cavity when the water pressure is in a normal state, a third water passing hole arranged at an interval with the first water passing hole is formed in the plate body, a third water passing hole communicated with the third water passing hole and the second flow channel unit is formed in the side wall of the valve body, and a second valve component communicated with the third water passing hole and the second flow channel unit when the water pressure of the third cavity rises and the pressure at the first pipe body returns to be normal is arranged in the third water passing hole. The third water passing hole is communicated with the second flow passage unit through the second valve component, so that pressure water in the third cavity flows back to the second flow passage unit and the first pipe body (namely in the bathing loop), after the pressure in the third cavity is released, the first valve rod can move to the position where the first blocking part leaves the outlet of the first flow passage unit under the action of the first elastic piece, namely the first valve component returns to the initial position, and the water in the bathing loop can normally flow.
The second valve assembly may have a variety of configurations, and preferably includes
The second plugging part is axially movably arranged in the third water passing hole and is far away from the third water passing hole under the condition that the water pressure of the third cavity is increased and the pressure of the first pipe body returns to normal;
and the second elastic piece acts on the second blocking part to ensure that the second blocking part keeps the tendency of blocking the third water through hole. Under normal conditions, the second plugging portion plugs the third water passing hole, water in the bathing loop cannot flow into the third cavity from the third water passing hole and only flows into the third cavity along the first flow channel unit, the second flow channel unit and the water outlet, and when the pressure in the third cavity rises and the pressure at the first pipe returns to normal, the second plugging portion is far away from the third water passing hole under the action of the water pressure of the third cavity, so that the third water passing hole is communicated with the second flow channel unit.
In order to guide the moving track of the second blocking part, the second valve assembly further comprises a second valve rod, the second blocking part is formed on the second valve rod along the radial direction, a central ring located in the center is arranged at the position, adjacent to the second flow passage unit, of the third water passing opening, the central ring and the inner wall of the third water passing opening are integrally connected through a connecting strip, and the second valve rod can be movably arranged in the central ring in a penetrating mode. The second valve rod plays a guiding role, and the second blocking part is prevented from deviating from a preset track and losing a blocking effect on the third water passing hole.
In order to improve the protection reliability of the expansion water tank when the water pressure of the bathing waterway rises, the valve body is provided with a fourth water passing port which is in fluid communication with the water outlet and a water passing channel which is communicated with the fourth water passing port and the water outlet, and a third valve component which can block the water outlet and the fourth water passing port when the water pressure of the third cavity is normal and can be communicated with the water outlet and the fourth water passing port when the water pressure of the third cavity rises is arranged in the water passing channel. The third valve component is used for opening when the first valve component is in failure and before the pressure rises to damage the expansion water tank, the bathing water pressure is discharged into a fourth cavity (namely a heating loop) through a fourth water passing opening, and the last protection effect is achieved.
The third valve assembly may have a plurality of structures, and preferably, the first end of the water passage is in communication with the fourth water outlet, and the second end of the water passage is in fluid communication with the water outlet, and the third valve assembly includes a third blocking portion capable of moving towards the second end far away from the water passage under the action of water flow and a third elastic member capable of keeping the third blocking portion blocking the second end of the water passage. Under normal conditions, the third blocking part blocks the water passing channel, and the bath water can normally flow into the third cavity; when the first valve component fails, the water pressure can push the third blocking part to overcome the elasticity of the third elastic part, and the second end of the water passage is opened, so that water enters the fourth cavity.
The technical scheme adopted by the invention for solving the third technical problem is as follows: the utility model provides an use above-mentioned expansion tank's dual-purpose stove which characterized in that: the domestic water pipeline is communicated with a third cavity of the expansion water tank, and the heating pipeline is communicated with a fourth cavity of the expansion water tank.
Compared with the prior art, the invention has the advantages that: 1. according to the invention, the plate body is arranged on the annular ring, and the third cavity (bathing water cavity) and the fourth cavity (heating water cavity) are separated by the rigid plate body, so that the bathing water pressure and the heating water pressure cannot be interfered with each other; 2. the valve body is arranged in the annular ring, the bath water enters the third cavity from the valve body, the first valve assembly is arranged in the valve body, and the first valve assembly can block a flow passage in the valve body and prohibit the bath water from continuously flowing into the third cavity when the bath water pressure of the third cavity rises, so that the water pressure in the third cavity cannot continuously rise again, the pressure protection effect is realized, and the high-pressure protection is performed on the expansion water tank.
Drawings
FIG. 1 is a schematic structural diagram of an expansion tank according to an embodiment of the present invention;
FIG. 2 is a schematic view of the structure of FIG. 1 in another direction;
FIG. 3 is an exploded view of FIG. 2;
FIG. 4 is a schematic view of the structure of FIG. 1 with the cover shell and the skin removed;
FIG. 5 is a schematic view of the structure of FIG. 1 with the cover shell and the skin removed in another direction;
FIG. 6 is a schematic structural view of the valve body of FIG. 5;
FIG. 7 is a front sectional view (normal bath water pressure) of FIG. 6;
FIG. 8 is a cross-sectional view of FIG. 2 (normal bath water pressure);
FIG. 9 is a cross-sectional view of FIG. 2 (water pressure rise in the third chamber);
FIG. 10 is a cross-sectional view of FIG. 2 (water pressure rise in the third chamber);
FIG. 11 is another cross-sectional view of FIG. 2 (water pressure rising in the third chamber and water pressure returning to normal at the first tube);
fig. 12 is a cross-sectional view of fig. 2 (first valve assembly failed).
Detailed Description
The invention is described in further detail below with reference to the accompanying examples.
As shown in fig. 1 to 12, the expansion tank of the preferred embodiment includes an intermediate housing 1, a membrane, a cover case, a valve body 6, a first valve assembly 7, a second valve assembly 9, and a third valve assembly 8.
As shown in fig. 3 to 5 and 7, the middle housing 1 may be made of a plastic material with a certain hardness, the middle housing 1 includes an annular ring 11 and a plate 12 integrally connected to the annular ring 11, and an edge of the annular ring 11 close to the first membrane 21 is connected to the plate 12 so that the middle housing 1 is in a bowl shape with an opening facing the second membrane 22.
The skin membrane is made of rubber materials with good elasticity and mechanical property and comprises a first skin membrane 21 and a second skin membrane 22, the first skin membrane 21 and the second skin membrane 22 are respectively arranged on two sides of the annular ring 11, the first skin membrane 21 is arched towards the direction away from the plate body 12 after being filled with water and inflated, and jointly encloses with the plate body 12 to form a third cavity 211, and the second skin membrane 22 and the middle shell 1 jointly enclose to form a fourth cavity 221.
The cover shell comprises a first cover shell 31 and a second cover shell 32, the first cover shell 31 is arranged on the outer side of the first membrane 21 and encloses a first cavity 311 together with the first membrane, and the second cover shell 32 is arranged on the outer side of the second membrane 22 and encloses a second cavity 321 together with the second membrane.
In this embodiment, the first cavity 311 is a bathing air cavity, the first cover 31 is provided with a first inflation inlet 312, the second cavity 321 is a heating air cavity, the second cover 32 is provided with a second inflation inlet 322, the third cavity 211 is a bathing water cavity, and the fourth cavity 221 is a heating water cavity.
As shown in fig. 1 and 3 to 5, a first pipe 4 and a second pipe 5 are circumferentially arranged on the circumferential wall of the annular ring 11 at intervals, the first pipe 4 is a water inlet pipe for bath water, the second pipe 5 is a water inlet pipe for heating water and is communicated with a fourth cavity 221, a valve body 6 is arranged in the fourth cavity 221, a flow channel 61 is arranged in the valve body 6, a water inlet 601 of the flow channel 61 is in fluid communication with the first pipe 4, and a first water passing hole 121 which penetrates through the wall thickness of the plate body 12 and is correspondingly communicated with a water outlet 602 of the flow channel 61 is arranged on the plate body 12. Thus, the bathing water flows into the third chamber 211 through the first pipe 4 and the valve 6, and the heating water flows into the fourth chamber 221 through the second pipe 5.
The flow channel 61 is composed of at least two sections of flow channel 61 units which are mutually communicated, wherein a first flow channel unit 611 is connected with the water outlet 602, a second water passing hole 122 which is arranged at an interval with the first water passing hole 121 is arranged on the plate body 12, a second water passing hole 62 which is communicated with the second water passing hole 122 and the first flow channel unit 611 is arranged on the side wall of the valve body 6, a first valve assembly 7 is arranged between the first flow channel unit 611 and the water outlet 602, and the first valve assembly 7 can block the outlet of the first flow channel unit 611 under the action of water flow entering from the second water passing hole 62 so as to prevent water in the flow channel from continuously entering the third cavity 211 to cause the water pressure in the third cavity 211 to continuously rise and finally damage the expansion water tank.
As shown in fig. 7 to 10 and 12, in the present embodiment, the first valve assembly 7 includes a first valve stem 71, a first elastic member 73, a seal portion, and a valve seat 63.
The first valve rod 71 can move along the axial direction of the first flow passage unit 611, and a first blocking portion 72 capable of blocking the outlet of the first flow passage unit 611 is radially arranged on the peripheral wall of the first valve rod 71, and the first blocking portion 72 is located outside the first flow passage unit 611, in this embodiment, the first blocking portion 72 is a sealing gasket sleeved on the first valve rod 71.
The sealing parts include a first sealing part 74 and a second sealing part 75 which are arranged on the peripheral wall of the first valve rod 71 along the radial direction, the peripheral edges of the first sealing part 74 and the second sealing part 75 are in sealing contact with the inner wall of the first flow channel unit 611, and the first sealing part 74 and the second sealing part 75 are arranged at intervals along the axial direction of the first valve rod 71 and are respectively positioned at two sides of the second water passing hole 62. In this embodiment, the first sealing portion 74 includes a first piston 741 formed radially on the outer peripheral wall of the first valve stem 71 and a first sealing ring 742 provided around the first piston 741, and the second sealing portion 75 includes a second piston 751 formed radially on the outer peripheral wall of the first valve stem 71 and a second sealing ring 752 provided around the second piston 751. The first and second packing 742 and 752 are in sealing contact with the inner wall of the first flow path unit 611.
The valve seat 63 is tubular, penetrates the peripheral wall of the annular ring 11 and is screwed into the first flow passage unit 611, and the first elastic member 73 is a spring, and both ends thereof abut against the second piston 751 and the valve seat 63, respectively, thereby causing the first blocking portion 72 to maintain a tendency to open the outlet of the first flow passage unit 611. The compression amount of the first elastic member 73 can be changed by adjusting the depth of the valve seat 63 inserted into the first flow passage unit 611.
When the water pressure in the bathing loop is increased, the water in the third cavity 211 enters the first flow channel unit 611 from the second water passing port 62, and because the second water passing port 62 is located between the first sealing portion 74 and the second sealing portion 75, the water flow can be accumulated between the first sealing portion 74 and the second sealing portion 75, when the water pressure is large enough, the first valve rod 71 can overcome the action of the first elastic member 73 under the water pressure to drive the first blocking portion 72 to move towards the outlet of the first flow channel unit 611 until the outlet is blocked, at this time, the water in the valve body 6 can not flow into the third cavity 211 any more, the water pressure in the third cavity 211 can not be increased continuously, and pressure protection is formed.
In order to return the first valve assembly 7 to the initial state when the water pressure in the first pipe 4 is normal, a second valve assembly 9 is provided. Along the water flow direction when the water pressure of the third cavity 211 is in a normal state, one section of the flow channel 61 located at the upstream of the first flow channel unit 611 is a second flow channel unit 612, the plate body 12 is provided with a third water passing hole 123 arranged at an interval with the first water passing hole 121, the side wall of the valve body 6 is provided with a third water passing hole 65 communicated with the third water passing hole 123 and the second flow channel unit 612, the second valve assembly 9 is arranged in the third water passing hole 65, and the second valve assembly 9 can be communicated with the third water passing hole 123 and the second flow channel unit 612 when the water pressure of the third cavity 211 rises and the pressure at the first pipe body 4 returns to normal.
As shown in fig. 7 and 11, in the present embodiment, the second valve assembly 9 includes a second valve stem 93, a second blocking portion 91, and a second elastic member 92.
The second valve rod 93 can move along the axial direction of the third water passing port 65, the second blocking portion 91 is formed on the second valve rod 93 along the radial direction, and the second blocking portion 91 is far away from the third water passing hole 123 under the condition that the water pressure of the third cavity 211 is increased and the pressure at the first pipe 4 returns to normal. In this embodiment, the second closing portion 91 has a plate shape.
The center of the third water passing port 65 is provided with a center ring 651, the center ring 651 and the inner wall of the third water passing port 65 are integrally connected by a connecting bar 652, and the second valve rod 93 is movably inserted into the center ring 651. The second elastic member 92 is a spring, and two ends of the second elastic member respectively abut against the second blocking portion 91 and the central ring 651, so that the second blocking portion 91 keeps the tendency of blocking the third water passing hole 123. Under normal conditions, the second blocking portion 91 blocks the third water passing hole 123, water in the bathing loop cannot flow into the third cavity 211 from the third water passing hole 123, and only flows into the third cavity 211 along the first flow passage unit 611, the second flow passage unit 612 and the water outlet 602, when the water pressure of the third cavity 211 rises and the pressure of the first tube 4 returns to a normal state, the second blocking portion 91 will be away from the third water passing hole 123 under the water pressure, so that the third water passing hole 123 and the second flow passage unit 612 are communicated, so that the pressure water in the third cavity 211 flows back to the second flow passage unit 612 and the first tube 4 (i.e. the bathing loop), after the pressure in the third cavity 211 is released, the first valve rod 71 will move to a position where the first blocking portion 72 leaves the outlet of the first flow passage unit 611 under the action of the first elastic member 73, i.e. the first valve assembly 7 returns to an initial position, the water in the bathing loop can be normally circulated.
In order to improve the protection reliability of the expansion tank when the water pressure of the bathing waterway is increased, a third valve assembly 8 is arranged, a fourth water passing port 66 which is communicated with the water outlet 602 and a water passing channel 67 which is communicated with the fourth water passing port 66 and the water outlet 602 are arranged on the valve body 6, the third valve assembly 8 is arranged in the water passing channel 67, and the third valve assembly 8 can block the water outlet 602 and the fourth water passing port 66 when the water pressure of the third cavity 211 is normal and can communicate the water outlet 602 and the fourth water passing port 66 when the water pressure of the third cavity 211 is increased.
As shown in fig. 7 to 10 and 12, the first end of the water passage 67 is correspondingly communicated with the fourth water passing opening 66, and the second end is in fluid communication with the water outlet 602, in this embodiment, the third valve assembly 8 includes a third blocking portion 81 capable of moving toward the second end far away from the water passage 67 under the action of water flow, and a third elastic member 82 capable of making the third blocking portion 81 keep blocking the second end of the water passage 67, the third blocking portion 81 is a sphere, and the third elastic member 82 is a spring and two ends of the spring respectively abut against the fourth water passing opening 66 and the third blocking portion 81.
Under normal conditions, the third blocking part 81 blocks the water passage 67, and the bath water can normally flow into the third cavity 211; when the first valve assembly 7 fails, the water pressure pushes the third blocking part 81 to overcome the elastic force of the third elastic member 82, and opens the second end of the water passage 67, so that water enters the fourth cavity 221. Thus, when the first valve assembly 7 fails and the pressure rises to the point where the expansion tank is damaged, the third valve assembly 8 is opened, and the pressure of the bath water is discharged into the fourth cavity 221 (i.e. the heating loop) through the fourth water passing opening 66, thereby playing a final protection role.
The working process of the expansion tank of the embodiment is as follows:
under normal conditions, after entering through the first tube 4, water flows into the third cavity 211 from the water outlet 602 through the flow channel 61, and the direction of the water flow is shown by hollow arrows in fig. 7 and 8;
when the pressure in the third cavity 211 is increased, the water in the third cavity 211 enters the first flow channel unit 611 from the second water passing opening 62, and the water flow direction is shown by the hollow arrow in fig. 9; and because the second water passing opening 62 is located between the first sealing portion 74 and the second sealing portion 75, water flow can accumulate between the first sealing portion 74 and the second sealing portion 75, when the water pressure is large enough, the first valve rod 71 can overcome the action of the first elastic member 73 under the water pressure to drive the first blocking portion 72 to move towards the outlet of the first flow channel unit 611 until the outlet is blocked, at this time, water in the valve body 6 can not flow into the third cavity 211 any more, the water pressure in the third cavity 211 can not rise continuously, pressure protection is formed, and the water flow direction is as shown by hollow arrows in fig. 10;
when the pressure at the first tube 4 returns to the normal state, the second blocking portion 91 will be away from the third water through hole 123 under the action of the water pressure, so that the third water through hole 123 is communicated with the second flow passage unit 612, and thus the pressure water in the third cavity 211 flows back to the second flow passage unit 612 and the first tube 4 (i.e. in the bathing loop), and the direction of the water flow is shown by the hollow arrow in fig. 11;
when the first valve assembly 7 fails, the water pressure pushes the third blocking portion 81 to overcome the elastic force of the third elastic member 82, and opens the second end of the water passage 67, so that water enters the fourth cavity 221, and the water flow direction is shown by the hollow arrow in fig. 12.
The expansion water tank can be used in a dual-purpose furnace, the dual-purpose furnace further comprises a heating pipeline and a domestic water pipeline, the domestic water pipeline is communicated with the first pipe body 4, and the heating pipeline is communicated with the second pipe body 5. The specific structure of the dual-purpose furnace and the cooperation with the expansion tank refer to the patent CN201720925341.9 'an expansion tank'.
The term "fluid communication" as used herein refers to a spatial relationship between two components or portions (hereinafter collectively referred to as a first portion and a second portion, respectively), i.e., a fluid (gas, liquid or a mixture of both) can flow along a flow path from the first portion and/or be transported to the second portion, and may be a direct communication between the first portion and the second portion, or an indirect communication between the first portion and the second portion via at least one third element, such as a fluid channel, e.g., a pipe, a channel, a conduit, a flow guide, a hole, a groove, or a chamber that allows a fluid to flow through, or a combination thereof.
Claims (12)
1. An expansion tank comprises
A middle housing (1) comprising an annular ring (11);
the rubber membrane comprises a first rubber membrane (21) and a second rubber membrane (22), wherein the first rubber membrane (21) and the second rubber membrane (22) are respectively arranged on two sides of the annular ring (11);
the cover shell comprises a first cover shell (31) and a second cover shell (32), the first cover shell (31) is arranged on the outer side of the first skin membrane (21) and encloses a first cavity (311) together with the first skin membrane, and the second cover shell (32) is arranged on the outer side of the second skin membrane (22) and encloses a second cavity (321) together with the second skin membrane;
the middle shell (1) is characterized by further comprising a plate body (12) integrally connected with the annular ring (11), the edge of the annular ring (11) close to the first membrane (21) is connected with the plate body (12) to enable an opening of the middle shell (1) to face the second membrane (22), the first membrane (21) and the plate body (12) jointly enclose a third cavity (211), and the second membrane (22) and the middle shell (1) jointly enclose a fourth cavity (221).
2. The expansion tank as claimed in claim 1, wherein: the improved water-saving valve is characterized in that a first pipe body (4) and a second pipe body (5) communicated with a fourth cavity (221) are arranged on the peripheral wall of the annular ring (11) at intervals along the circumferential direction, a valve body (6) is arranged in the fourth cavity (221), a flow channel (61) is formed in the valve body (6), a water inlet (601) of the flow channel (61) is communicated with the first pipe body (4) in a fluid mode, and a first water passing hole (121) which penetrates through the wall thickness of the plate body (12) and is communicated with a water outlet (602) of the flow channel (61) correspondingly is formed in the plate body (12).
3. The expansion tank as claimed in claim 2, wherein: the runner (61) is composed of at least two segments of runner units which are mutually communicated, wherein a first runner unit (611) is connected with the water outlet (602), a second water passing hole (122) which is arranged at an interval with the first water passing hole (121) is arranged on the plate body (12), a second water passing hole (62) which is communicated with the second water passing hole (122) and the first runner unit (611) is formed in the side wall of the valve body (6), and a first valve assembly (7) which can block the outlet of the first runner unit (611) under the action of water flow entering from the second water passing hole (62) is arranged between the first runner unit (611) and the water outlet (602).
4. The expansion tank as claimed in claim 3, wherein: the first valve assembly (7) comprises
A first valve rod (71) capable of moving along the axial direction of the first flow channel unit (611), wherein a first blocking part (72) capable of blocking the outlet of the first flow channel unit (611) is arranged on the peripheral wall of the first valve rod (71) along the radial direction, and the first blocking part (72) is positioned outside the first flow channel unit (611);
a first elastic member (73) that acts on the first valve stem (71) and keeps the first closing part (72) in a tendency to open the outlet of the first flow path unit (611);
and the sealing parts comprise a first sealing part (74) and a second sealing part (75) which are arranged on the peripheral wall of the first valve rod (71) along the radial direction and are in sealing contact with the inner wall of the first flow channel unit (611) along the peripheral edge, and the first sealing part (74) and the second sealing part (75) are arranged along the axial direction of the first valve rod (71) at intervals and are respectively positioned at two sides of the second water passing opening (62).
5. The expansion tank as claimed in claim 4, wherein: the first sealing portion (74) comprises a first piston (741) formed on the outer peripheral wall of the first valve rod (71) in the radial direction and a first sealing ring (742) arranged on the first piston (741) in an enclosing mode; the second sealing portion (75) includes a second piston (751) formed on the outer peripheral wall of the first valve stem (71) in the radial direction and a second sealing ring (752) provided around the second piston (751).
6. The expansion tank as claimed in claim 4, wherein: the sealing device further comprises a valve seat (63) penetrating through the peripheral wall of the annular ring (11) and detachably inserted into the first flow channel unit (611), the first elastic piece (73) is a spring, and two ends of the first elastic piece abut against the second sealing part (75) and the valve seat (63) respectively.
7. The expansion tank as claimed in claim 3, wherein: along the water flow direction when the water pressure of third cavity (211) is in normal state, one of them section that is located first flow path unit (611) upper reaches is second flow path unit (612), be equipped with on plate body (12) and cross water hole (123) with the third of first water hole (121) interval setting, set up the third that communicates water hole (123) and second flow path unit (612) on the lateral wall of valve body (6) and cross mouth of a river (65), be equipped with in the third and cross mouth of a river (65) and can be in third cavity (211) water pressure rising and first body (4) department pressure return normal when intercommunication third is crossed water hole (123) and second flow path unit (612) second valve subassembly (9).
8. The expansion tank as claimed in claim 7, wherein: the second valve assembly (9) comprises
The second blocking part (91) is axially movably arranged in the third water passing port (65) and is far away from the third water passing hole (123) under the condition that the water pressure of the third cavity (211) rises and the pressure at the first pipe body (4) returns to normal;
and a second elastic member (92) acting on the second blocking part (91) to keep the second blocking part (91) in a tendency of blocking the third water passing hole (123).
9. The expansion tank as claimed in claim 8, wherein: the second valve assembly (9) further comprises a second valve rod (93), the second blocking portion (91) is formed on the second valve rod (93) in the radial direction, a central ring (651) located in the center is arranged on the portion, adjacent to the second flow channel unit (612), of the third water passing opening (65), the central ring (651) and the inner wall of the third water passing opening (65) are integrally connected through a connecting strip (652), and the second valve rod (93) can movably penetrate through the central ring (651).
10. The expansion tank as claimed in claim 3, wherein: the valve body (6) is provided with a fourth water passing port (66) which is in fluid communication with the water outlet (602) and a water passing channel (67) which is communicated with the fourth water passing port (66) and the water outlet (602), and a third valve assembly (8) which can block the water outlet (602) and the fourth water passing port (66) when the water pressure of the third cavity (211) is normal and can communicate the water outlet (602) and the fourth water passing port (66) when the water pressure of the third cavity (211) is increased is arranged in the water passing channel (67).
11. The expansion tank as claimed in claim 10, wherein: the first end of the water channel (67) is correspondingly communicated with the fourth water passing opening (66), the second end of the water channel is communicated with the water outlet (602) in a fluid mode, and the third valve component (8) comprises a third blocking part (81) capable of moving towards the second end far away from the water channel (67) under the action of water flow and a third elastic piece (82) capable of enabling the third blocking part (81) to keep blocking the second end of the water channel (67).
12. A dual-purpose furnace using the expansion tank as claimed in any one of claims 1 to 11, wherein: the heating water pipe is communicated with a third cavity (211) of the expansion water tank, and the heating pipe is communicated with a fourth cavity (221) of the expansion water tank.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053703.6A CN111174273B (en) | 2020-01-17 | 2020-01-17 | Expansion tank and dual-purpose furnace using same |
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| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202010053703.6A CN111174273B (en) | 2020-01-17 | 2020-01-17 | Expansion tank and dual-purpose furnace using same |
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| Publication Number | Publication Date |
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| CN111174273A true CN111174273A (en) | 2020-05-19 |
| CN111174273B CN111174273B (en) | 2021-05-18 |
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| Application Number | Title | Priority Date | Filing Date |
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| CN202010053703.6A Active CN111174273B (en) | 2020-01-17 | 2020-01-17 | Expansion tank and dual-purpose furnace using same |
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Cited By (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| CN113958402A (en) * | 2021-12-23 | 2022-01-21 | 象山博宇汽车模塑制造有限公司 | Expansion tank |
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| CN208475648U (en) * | 2018-06-06 | 2019-02-05 | 广东万家乐燃气具有限公司 | A kind of heat exchanger and gas heater with antifreeze function |
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| CN201715705U (en) * | 2009-12-10 | 2011-01-19 | 广东万家乐燃气具有限公司 | Fully premixed condensing gas heating hot water furnace |
| GB2506945A (en) * | 2012-10-10 | 2014-04-16 | Tyronne Gordon Harnett | Apparatus for purging particulates from a central heating system |
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| CN113958402A (en) * | 2021-12-23 | 2022-01-21 | 象山博宇汽车模塑制造有限公司 | Expansion tank |
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| Publication number | Publication date |
|---|---|
| CN111174273B (en) | 2021-05-18 |
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