Eccentric flow sensor

Abstract

The utility model discloses an eccentric flow sensor which comprises a shell, the shell comprises an installation sleeve, a cover plate is arranged on the upper portion of the installation sleeve, the center of the installation sleeve and the center of the cover plate are staggered, a sensing assembly is arranged in the shell, the lower end of the installation sleeve is an opening, a liquid outlet is formed in the side face of the installation sleeve, and the opening in the lower end of the installation sleeve, the sensing assembly and the liquid outlet form a water outlet channel. According to the utility model, the center of the mounting sleeve of the shell and the center of the cover plate above the mounting sleeve are designed into a staggered structure, so that after the flow sensor and the valve body of the water inlet valve are mounted, the function that cold water flows out from a plate exchange interface below the valve body of the water inlet valve after passing through the shell is realized.

Description

TECHNICAL FIELD

[0001] The utility model relates to flow sensor, more particularly, relate to a eccentric flow sensor. BACKGROUND

[0002] The flow sensor for wall-hanging stove is mostly installed at the water inlet valve and is used for generating the signal of the water flow of the wall-hanging stove for life, and corresponding instructions are sent according to the size of water flow and on-off to control the working state of the gas valve.

[0003] The existing flow sensor has the following deficiencies: Figure 1 As shown in the figure, the arrow is the cold water flow direction, when the cold water passes through the shell 500 of the flow sensor, it can only flow into the plate exchange from the upper plate exchange interface 600 in the water inlet valve body 400, and cannot flow into the plate exchange from the lower plate exchange interface 600, so it is urgently needed to improve. UTILITY MODEL CONTENT

[0004] The utility model aims at overcoming the deficiencies of the prior art, and provides an eccentric flow sensor, which is designed as a staggered structure with the center of the mounting sleeve of the shell and the center of the cover plate above the mounting sleeve, so that the cold water can flow out from the plate exchange interface below the water inlet valve body after passing through the shell after the flow sensor is installed with the water inlet valve body.

[0005] In order to achieve the above-mentioned purpose, the utility model adopts the following technical scheme: an eccentric flow sensor, comprising a shell, the shell comprises a mounting sleeve, the upper part of the mounting sleeve is provided with a cover plate, the center of the mounting sleeve is staggered with the center of the cover plate, the inside of the shell is provided with a sensing assembly, the lower end of the mounting sleeve is an opening, the side surface of the mounting sleeve is provided with a liquid outlet, the lower end opening of the mounting sleeve, the sensing assembly and the liquid outlet form a water outlet waterway.

[0006] Further, the sensing assembly comprises a magnetic ring with a snap spring, an impeller and a water distribution wheel arranged from top to bottom, the upper part of the impeller is provided with a second boss, and the magnetic ring is sleeved outside the second boss.

[0007] Further, the upper part of the cover plate is provided with a first boss, and a Hall sensor is sleeved outside the first boss.

[0008] Further, the lower part of the sensing assembly is provided with a flow limiting device, the flow limiting device comprises a flow limiting sleeve, the upper part of the flow limiting sleeve is connected with the mounting sleeve, and a flow limiting valve core is installed in the flow limiting sleeve.

[0009] Further, a sealing ring is sleeved outside the flow limiting sleeve, the upper part of the flow limiting sleeve is inserted into the mounting sleeve, and the sealing ring is sealingly matched with the inner wall of the mounting sleeve.

[0010] Further, the flow limiting valve core comprises a ring-shaped sleeve, the ring-shaped sleeve is in interference fit with the flow limiting sleeve, an inner core is arranged inside the ring-shaped sleeve, and a liquid passing gap is arranged between the inner core and the ring-shaped sleeve.

[0011] Further, the flow limiting sleeve is internally provided with a first annular rib, the upper portion of the flow limiting valve core abuts the lower portion of the first annular rib, the upper portion of the ring-shaped sleeve is provided with a second annular rib, the inner core is located below the second annular rib, and a gap exists between the inner core and the second annular rib.

[0012] Further, the flow limiting sleeve is internally provided with a first annular rib, the upper portion of the flow limiting valve core abuts the lower portion of the first annular rib, the upper portion of the ring-shaped sleeve is provided with a second annular rib, the inner core is located below the second annular rib, and a gap exists between the inner core and the second annular rib.

[0013] Further, the flow limiting sleeve is internally provided with a first annular rib, the upper portion of the flow limiting valve core abuts the lower portion of the first annular rib, the upper portion of the ring-shaped sleeve is provided with a second annular rib, the inner core is located below the second annular rib, and a gap exists between the inner core and the second annular rib.

[0014] Further, the flow limiting sleeve is internally provided with a first annular rib, the upper portion of the flow limiting valve core abuts the lower portion of the first annular rib, the upper portion of the ring-shaped sleeve is provided with a second annular rib, the inner core is located below the second annular rib, and a gap exists between the inner core and the second annular rib.

[0015] In summary, the utility model has the following beneficial effects:

[0016] The axis of the mounting sleeve and the axis of the cover plate are arranged in a staggered manner, so that design space is left for the formation of the liquid passing channel feature, the flow sensor is in communication with the plate exchange connecting port located below, the structure is simple and reasonable, and the use demand of more plate exchange styles can be met. BRIEF DESCRIPTION OF DRAWINGS

[0017] Figure 1 It is an installation schematic view of the existing flow sensor and the water inlet valve body;

[0018] Figure 2 It is an installation schematic view of the utility model and the water inlet valve body;

[0019] Figure 3 It is a structure schematic view of the utility model;

[0020] Figure 4 It is an explosion view of the utility model;

[0021] Figure 5 It is a sectional view of the utility model;

[0022] Figure 6 It is Figure 5 It is an enlarged view at A.

[0023] Fig. 1 is a shell; 11, mounting sleeve; 12, cover plate; 13, liquid outlet; 14, first boss; 2, sensing assembly; 21, magnetic ring; 22, circlip; 23, impeller; 231, second boss; 24, water distribution wheel; 3, flow limiting sleeve; 31, first annular rib; 4, flow limiting valve core; 41, annular sleeve; 42, inner core; 43, liquid passing gap; 44, second annular rib; 5, primary filter shell; 6, secondary filter screen; 7, tertiary filter screen; 8, sealing ring; 9, Hall sensor; 100, water inlet valve body; 200, plate exchange connection port; 300, liquid passing channel. DETAILED DESCRIPTION

[0024] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0025] As shown in the drawings, Figures 2 to 6 The present embodiment discloses an eccentric flow sensor, which comprises a shell 1, the shell 1 comprises a mounting sleeve 11, the upper part of the mounting sleeve 11 is provided with a cover plate 12, the center of the mounting sleeve 11 is staggered with the center of the cover plate 12, when the present application is installed in a water inlet valve body 100, the axis of the mounting sleeve 11 is staggered with the axis of the cover plate 12, thereby leaving design space for the formation of the liquid passing channel 300 feature, realizing the communication of the flow sensor with the plate exchange connection port 200 located below, and forming the cold water flow direction (arrow direction) as shown in the drawings inside the water inlet valve body 100. Not only is the structure simple and the design reasonable, but also the use demand of more plate exchange styles can be met. Figure 2

[0026] The shell 1 is internally provided with a sensing assembly 2, specifically, the sensing assembly 2 comprises a magnetic ring 21 with a circlip 22, an impeller 23 and a water distribution wheel 24 arranged from top to bottom, the upper part of the impeller 23 is provided with a second boss 231, the magnetic ring 21 is sleeved outside the second boss 231, the upper part of the cover plate 12 is provided with a first boss 14, the first boss 14 is sleeved with a Hall sensor 9 outside, and the sensing assembly 2 and the Hall sensor 9 are both prior art.

[0027] The lower end of the mounting sleeve 11 is an opening, the side surface of the mounting sleeve 11 is provided with a liquid outlet 13, the lower end opening of the mounting sleeve 11, the sensing assembly 2 and the liquid outlet 13 form a water outlet channel, and the flow of cold water passing through the sensing assembly 2 can be sensed by the sensing assembly 2.

[0028] ​The lower part of the sensing assembly 2 is provided with a flow limiting device, the flow limiting device comprises a flow limiting sleeve 3, the upper part of the flow limiting sleeve 3 is connected with a mounting sleeve 11, specifically, the outer side of the flow limiting sleeve 3 is provided with a sealing ring 8, the upper part of the flow limiting sleeve 3 is inserted into the mounting sleeve 11, and the sealing ring 8 is in sealing cooperation with the inner wall of the mounting sleeve 11, through the setting of the sealing ring 8, the cold water can be effectively prevented from entering the sensing assembly 2 from the gap between the flow limiting sleeve 3 and the mounting sleeve 11, and through the above design, the detachable design of the flow limiting device can be realized, and the disassembly and assembly of the flow limiting device are facilitated.

[0029] The flow limiting sleeve 3 is provided with a flow limiting valve core 4, the flow limiting valve core 4 comprises an annular sleeve 41, the annular sleeve 41 is integrally connected with the flow limiting sleeve 3 in interference fit, the inner part of the annular sleeve 41 is provided with an inner core 42, the inner core 42 and the annular sleeve 41 are connected through a connecting rib (not shown in the figure), the inner core 42 and the annular sleeve 41 are provided with a liquid passing gap 43, the liquid passing gap 43 is located between adjacent two connecting ribs, the inner part of the flow limiting sleeve 3 is provided with a first annular rib 31, the upper part of the flow limiting valve core 4 abuts against the lower part of the first annular rib 31, the upper part of the annular sleeve 41 is provided with a second annular rib 44, the inner core 42 is located below the second annular rib 44, and there is a gap between the inner core 42 and the second annular rib 44, through the setting of the flow limiting valve core 4, the cold water flow entering the sensing assembly 2 can be limited.

[0030] The lower part of the flow limiting sleeve 3 is fixed with a primary filter shell 5, the upper end of the primary filter shell 5 is inserted into the flow limiting sleeve 3, the inner wall of the flow limiting sleeve 3 and the outer wall of the primary filter shell 5 are integrally connected in interference fit, the upper part of the primary filter shell 5 is provided with a secondary filter screen 6, the secondary filter screen 6 is located in the flow limiting sleeve 3, the upper part of the flow limiting sleeve 3 is provided with a tertiary filter screen 7, the tertiary filter screen 7 is located in the mounting sleeve 11, the upper part of the tertiary filter screen 7 abuts against the lower part of the sensing assembly 2 and the lower part abuts against the upper part of the flow limiting sleeve 3, the mesh sizes of the primary filter shell 5, the secondary filter screen 6 and the tertiary filter screen 7 are gradually reduced, through the setting of the primary filter shell 5, the secondary filter screen 6 and the tertiary filter screen 7, the three times filtration of the cold water is realized, and the filtration effect is good.

[0031] In operation, cold water entering the water inlet of the water inlet valve body 100 is filtered by the first filter shell 5 and the second filter screen 6, and then enters the flow limiting device. The cold water is limited by the flow limiting valve core 4 of the flow limiting device, and then filtered by the third filter screen 7. The filtered cold water enters the disturbance cavity between the water distribution wheels 24. Since the impeller of the water distribution wheel 24 has a certain inclination angle, the flow direction of the fluid is partially axially rotated after passing through the water distribution wheel 24, which pushes the rotation of the impeller 23 and drives the rotation of the magnetic ring 21. The magnetic ring 21 has three pairs of magnetic poles. The magnetic ring 21 is inducted by the outer end Hall sensor 9 connected thereto, and the rotation frequency of the magnetic pole of the impeller 23 is converted into corresponding flow by the wall-hanging stove control panel connected with the Hall sensor 9. Finally, the fluid flows out from the plate exchange connecting port 200 located below, so that the accurate measurement of the fluid flow is completed. The control panel can control the size of the gas valve fire according to the received signal, so as to stabilize the outlet water temperature.

[0032] The preferred embodiments of the present application are described above, the protection scope of the present application is not limited to the above-mentioned embodiments, any technical solutions falling within the concept of the present application shall fall within the protection scope of the present application. It should be noted that, for ordinary skilled in the art, some improvements and decorations without departing from the principles of the present application shall also be considered as falling within the protection scope of the present application.

Claims

1. An eccentric flow sensor, characterized in that, The device includes a housing (1), which includes a mounting sleeve (11). The mounting sleeve (11) has a cover plate (12) on its upper part. The center of the mounting sleeve (11) is offset from the center of the cover plate (12). The housing (1) has a sensing component (2) inside. The lower end of the mounting sleeve (11) is open. The side of the mounting sleeve (11) has a liquid outlet (13). The lower end opening of the mounting sleeve (11), the sensing component (2), and the liquid outlet (13) form a water outlet path.

2. The eccentric flow sensor according to claim 1, characterized in that, The sensing component (2) includes a magnetic ring (21) with a retaining ring (22) arranged from top to bottom, an impeller (23) and a water separator (24). The impeller (23) has a second boss (231) on its upper part, and the magnetic ring (21) is sleeved on the outside of the second boss (231).

3. An eccentric flow sensor according to claim 2, characterized in that, The cover plate (12) has a first protrusion (14) on its upper part, and a Hall sensor (9) is sleeved on the outside of the first protrusion (14).

4. An eccentric flow sensor according to claim 1, characterized in that, The sensing component (2) is provided with a flow limiting device at its lower part. The flow limiting device includes a flow limiting sleeve (3). The upper part of the flow limiting sleeve (3) is connected to the mounting sleeve (11). A flow limiting valve core (4) is installed inside the flow limiting sleeve (3).

5. An eccentric flow sensor according to claim 4, characterized in that, A sealing ring (8) is provided on the outer side of the flow limiting sleeve (3), and the upper part of the flow limiting sleeve (3) is inserted into the mounting sleeve (11). The sealing ring (8) is sealed to the inner wall of the mounting sleeve (11).

6. An eccentric flow sensor according to claim 4, characterized in that, The flow limiting valve core (4) includes an annular sleeve (41), which is press-fitted with the flow limiting sleeve (3). The annular sleeve (41) has an inner core (42) inside, and a liquid passage gap (43) is provided between the inner core (42) and the annular sleeve (41).

7. An eccentric flow sensor according to claim 6, characterized in that, The flow limiting sleeve (3) has a first annular rib (31) inside. The upper part of the flow limiting valve core (4) abuts against the lower part of the first annular rib (31). The upper part of the annular sleeve (41) has a second annular rib (44). The inner core (42) is located below the second annular rib (44). There is a gap between the inner core (42) and the second annular rib (44).

8. An eccentric flow sensor according to claim 4, characterized in that, The lower part of the flow-limiting sleeve (3) is fixed with a primary filter shell (5), the upper end of the primary filter shell (5) is inserted into the flow-limiting sleeve (3), and the inner wall of the flow-limiting sleeve (3) is interference-fitted with the outer wall of the primary filter shell (5).

9. An eccentric flow sensor according to claim 8, characterized in that, The upper part of the primary filter housing (5) is provided with a secondary filter screen (6), which is located inside the flow-limiting sleeve (3).

10. An eccentric flow sensor according to claim 9, characterized in that, The upper part of the flow limiting sleeve (3) is provided with a three-stage filter (7), which is located inside the mounting sleeve (11). The upper part of the three-stage filter (7) abuts against the lower part of the sensing component (2) and the lower part abuts against the upper part of the flow limiting sleeve (3).

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