阅读说明：本技术 一种液动两位三通阀 (Hydraulic two-position three-way valve ) 是由 熊颖申 何光雄 王金良 雷立强 曾凯波 于 2021-08-11 设计创作，主要内容包括：本发明公开了一种液动两位三通阀,包括阀体,所述阀体内具有空腔,空腔内滑动设置有阀杆,阀杆将空腔隔离为左侧的平衡腔和右侧的动力腔,阀体底部开有进水孔、第一出液孔和第二出液孔,进水孔与动力腔连通,阀杆的圆周壁上开有第一环形槽和第二环形槽,第一环形槽与第二环形槽完全隔离,第二环形槽与动力腔完全隔离,平衡腔与第一环形槽相通,阀体内具有第一流通通道和第二流通通道,第一流通通道通过节流孔与动力腔连通,进水孔的直径大于节流孔的直径,第一流通通道与第二流通通道连通,阀杆的左端与平衡腔的左壁通过弹簧连接；本结构可以同时实现胶囊咖啡和滴漏咖啡的制作,简化操作步骤,其成本低、稳定性高。(The invention discloses a hydraulic two-position three-way valve which comprises a valve body, wherein a cavity is formed in the valve body, a valve rod is arranged in the cavity in a sliding manner, the cavity is isolated into a balance cavity on the left side and a power cavity on the right side by the valve rod, a water inlet hole, a first liquid outlet hole and a second liquid outlet hole are formed in the bottom of the valve body, the water inlet hole is communicated with the power cavity, a first annular groove and a second annular groove are formed in the circumferential wall of the valve rod, the first annular groove is completely isolated from the second annular groove, the second annular groove is completely isolated from the power cavity, the balance cavity is communicated with the first annular groove, a first circulation channel and a second circulation channel are formed in the valve body, the first circulation channel is communicated with the power cavity through a throttling hole, the diameter of the water inlet hole is larger than that of the throttling hole, the first circulation channel is communicated with the second circulation channel, and the left end of the valve rod is connected with the left wall of the balance cavity through a spring; the structure can simultaneously realize the production of capsule coffee and drip coffee, simplifies the operation steps, and has low cost and high stability.)

1. The hydraulic two-position three-way valve is characterized by comprising a valve body (4), wherein a cavity is formed in the valve body (4), a valve rod (2) is arranged in the cavity in a sliding manner, the cavity is isolated into a left balance cavity (9) and a right power cavity (8) by the valve rod (2), a water inlet hole (11), a first liquid outlet hole (12) and a second liquid outlet hole (13) are formed in the bottom of the valve body (4), the water inlet hole (11) is communicated with the power cavity (8), a first annular groove (14) and a second annular groove (15) are formed in the side wall of the valve rod (2), the first annular groove (14) is completely isolated from the second annular groove (15), the second annular groove (15) is completely isolated from the power cavity (8), the balance cavity (9) is communicated with the first annular groove (14), a first circulation channel (16) and a second circulation channel (17) are formed in the valve body (4), and the first circulation channel (16) is communicated with the power cavity (8) through a throttling hole (10), the diameter of the water inlet hole (11) is larger than that of the throttling hole (10), the first circulation channel (16) is communicated with the second circulation channel (17), and the left end of the valve rod (2) is connected with the left wall of the balance cavity (9) through the spring (1);

in an initial state, the valve rod (2) is static, and the second circulation channel (17) and the first liquid outlet hole (12) are simultaneously communicated with the first annular groove (14); the valve rod (2) moves towards the left side, and the second circulation channel (17) and the second liquid outlet hole (13) can be simultaneously communicated with the second annular groove (15).

2. A hydraulic two-position three-way valve according to claim 1, wherein a first annular groove is formed in the side wall of the valve rod (2), the first annular groove is located between the second annular groove (15) and the right wall of the valve rod (2), a first sealing ring (18) is sleeved on the first annular groove, the first sealing ring (18) can completely seal the gap between the valve rod (2) and the cavity, and the first sealing ring (18) is always in contact with the side wall of the cavity.

3. A hydraulic two-position three-way valve according to claim 1, wherein a second annular groove is formed in the side wall of the valve rod (2), the second annular groove is located between the first annular groove (14) and the second annular groove (15), a second sealing ring (3) is sleeved on the second annular groove, and the second sealing ring (3) can completely seal the gap between the valve rod (2) and the cavity; when the first annular groove (14) is communicated with the second circulation channel (17), the second sealing ring (3) is positioned on the right side of the second circulation channel (17) to completely isolate the first annular groove (14) from the second annular groove (15); when the second annular groove (15) is communicated with the second circulation channel (17), the second sealing ring (3) is positioned on the left side of the second circulation channel (17) to completely isolate the first annular groove (14) from the second annular groove (15).

4. A hydraulic two-position three-way valve according to claim 1, wherein the right end of the cavity is open and closed by an end cap (5).

5. A hydraulic two-position three-way valve according to claim 4, characterized in that the right side of the end cover (5) is fixed by a retaining ring (6).

6. A hydraulic two-position three-way valve according to claim 1, characterized in that the right end of the first channel (16) is open and the right end of the first channel (16) is closed by means of a steel ball (7).

7. A hydraulic two-position three-way valve according to claim 1, wherein the top end of the second channel (17) is closed, and the top end of the second channel (17) is closed by the first steel ball (7).

8. A hydraulic two-position three-way valve according to claim 1, wherein the left end of the valve rod (2) is provided with a blind hole, the right end of the spring (1) is connected with the right wall of the blind hole, and the left end of the spring (1) is connected with the left wall of the balance cavity (9).

Technical Field

The invention relates to the technical field of valves, in particular to a hydraulic two-position three-way valve.

Background

The existing coffee machine mainly comprises a capsule coffee machine and a drip coffee machine, wherein the capsule coffee machine needs a low-flow working mode of a pump to slowly generate large pressure so as to realize the production of capsule coffee, and the drip coffee needs a high-flow working mode of the pump to realize the production of drip coffee. Both modes of flow are achieved by adjusting the PWM. In order to realize a coffee machine with two coffee functions, the current technology is to use a two-position three-way solenoid valve to switch the pipelines. Along with the rise of brass price, the cost of the electromagnetic valve is higher and higher, and the electromagnetic valve needs to be switched continuously during use, so that the use is inconvenient.

Disclosure of Invention

Aiming at the defects in the prior art, the invention provides the hydraulic two-position three-way valve, which realizes the production of capsule coffee and drip coffee, simplifies the operation steps, and has low cost and high stability.

A hydraulic two-position three-way valve comprises a valve body, wherein a cavity is formed in the valve body, a valve rod is arranged in the cavity in a sliding mode, the cavity is isolated into a left balance cavity and a right power cavity by the valve rod, a water inlet hole, a first liquid outlet hole and a second liquid outlet hole are formed in the bottom of the valve body, the water inlet hole is communicated with the power cavity, a first annular groove and a second annular groove are formed in the circumferential wall of the valve rod, the first annular groove is completely isolated from the second annular groove, the second annular groove is completely isolated from the power cavity, the balance cavity is communicated with the first annular groove, a first circulation channel and a second circulation channel are formed in the valve body, the first circulation channel is communicated with the power cavity through a throttling hole, the diameter of the water inlet hole is larger than that of the throttling hole, the first circulation channel is communicated with the second circulation channel, and the left end of the valve rod is connected with the left wall of the balance cavity through a spring;

in an initial state, the second circulation channel and the first liquid outlet hole are simultaneously communicated with the first annular groove; the valve rod moves towards the left side, and the second circulation channel and the second liquid outlet hole can be communicated with the second annular groove at the same time.

Preferably, open on the circumference wall of valve rod has first annular groove, and first annular groove is located between the right wall of second ring channel and valve rod, and the cover is equipped with first sealing washer on the first annular groove, and first sealing washer can be sealed the clearance between valve rod and the cavity completely, and first sealing washer keeps contact with cavity circumference wall all the time.

Preferably, a second annular groove is formed in the circumferential wall of the valve rod and located between the first annular groove and the second annular groove, a second sealing ring is sleeved on the second annular groove, and the second sealing ring can completely seal a gap between the valve rod and the cavity; when the first annular groove is communicated with the second circulation passage, the second sealing ring is positioned on the right side of the second circulation passage to completely isolate the first annular groove from the second annular groove; when the second annular groove is communicated with the second circulation passage, the second sealing ring is positioned on the left side of the second circulation passage to completely isolate the first annular groove from the second annular groove.

Preferably, the right end of the cavity is open, and the right end of the cavity is closed by an end cover.

Preferably, the right side of the end cap is fixed by a snap ring.

Preferably, the right end of the first channel is open, and the right end of the first channel is closed by steel balls.

Preferably, the top end of the second channel is closed, and the top end of the second channel is closed by adopting a first steel ball.

Preferably, the left end of the valve rod is provided with a blind hole, the right end of the spring is connected with the right wall of the blind hole, and the left end of the spring is connected with the left wall of the balance cavity.

The invention has the beneficial effects that: in the technical scheme, a cavity is formed in a valve body, a valve rod is arranged in the cavity in a sliding mode, the cavity is isolated into a left balance cavity and a right power cavity by the valve rod, a water inlet hole, a first liquid outlet hole and a second liquid outlet hole are formed in the bottom of the valve body, the water inlet hole is communicated with the power cavity, a first annular groove and a second annular groove are formed in the circumferential wall of the valve rod, the first annular groove is completely isolated from the second annular groove, the second annular groove is completely isolated from the power cavity, the balance cavity is communicated with the first annular groove, a first circulation channel and a second circulation channel are formed in the valve body, the first circulation channel is communicated with the power cavity through a throttling hole, the diameter of the water inlet hole is larger than that of the throttling hole, the first circulation channel is communicated with the second circulation channel, and the left end of the valve rod is connected with the left wall of the balance cavity through a spring; this device need not carry out the pipeline like the solenoid valve and switch, only need adjust the output of electromagnetic pump can, convenient to use also need not so expensive preparation of solenoid valve simultaneously, pure mechanical structure, production is simple, the low price.

Drawings

In order to more clearly illustrate the detailed description of the invention or the technical solutions in the prior art, the drawings that are needed in the detailed description of the invention or the prior art will be briefly described below. Throughout the drawings, like elements or portions are generally identified by like reference numerals. In the drawings, elements or portions are not necessarily drawn to scale.

FIG. 1 is a front sectional view of the present invention.

In the attached figure, 1-spring, 2-valve rod, 3-second sealing ring, 4-valve body, 5-end cover, 6-retaining ring, 7-steel ball, 8-power cavity, 9-balance cavity, 10-throttling hole, 11-water inlet hole, 12-first liquid outlet hole, 13-second liquid outlet hole, 14-first annular groove, 15-second annular groove, 16-first circulation channel, 17-second circulation channel and 18-first sealing ring.

Detailed Description

Embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The following examples are only for illustrating the technical solutions of the present invention more clearly, and therefore are only examples, and the protection scope of the present invention is not limited thereby.

It is to be noted that, unless otherwise specified, technical or scientific terms used herein shall have the ordinary meaning as understood by those skilled in the art to which the invention pertains.

Example 1

As shown in fig. 1, the present embodiment provides a hydraulic two-position three-way valve, which includes a valve body 4, the valve body 4 has a cavity therein, a valve rod 2 is slidably disposed in the cavity, the cavity is separated into a left balance cavity 9 and a right power cavity 8 by the valve rod 2, a bottom of the valve body 4 is opened with a water inlet hole 11, a first liquid outlet hole 12 and a second liquid outlet hole 13, the water inlet hole 11 is communicated with the power cavity 8, a circumferential wall of the valve rod 2 is opened with a first annular groove 14 and a second annular groove 15, the first annular groove 14 is completely separated from the second annular groove 15, the second annular groove 15 is completely separated from the power cavity 8, the balance cavity 9 is communicated with the first annular groove 14, the valve body 4 has a first circulation channel 16 and a second circulation channel 17 therein, the first circulation channel 16 is communicated with the power cavity 8 through an orifice 10, a diameter of the water inlet hole 11 is larger than a diameter of the orifice 10, the first circulation channel 16 is communicated with the second circulation channel 17, the left end of the valve rod 2 is connected with the left wall of the balance cavity 9 through a spring 1, and the right end of the valve rod 2 is in contact with the right wall of the power cavity 8 through a connecting rod;

in the initial state, the valve rod 2 is static, the spring 1 has right initial pre-pressure, and the second circulation channel 17 and the first liquid outlet hole 12 are simultaneously communicated with the first annular groove 14; when the valve rod 2 moves to the left, the second flow channel 17 and the second liquid outlet hole 13 are simultaneously communicated with the second annular groove 15.

In this embodiment both the cavity and the valve stem 2 are cylindrical.

In this embodiment, a first annular groove is formed in the circumferential wall of the valve rod 2, the first annular groove is located between the second annular groove 15 and the right wall of the valve rod 2, a first sealing ring 18 is sleeved on the first annular groove, the first sealing ring 18 can completely seal a gap between the valve rod 2 and the cavity, and the first sealing ring 18 is always in contact with the circumferential wall of the cavity. Thereby achieving complete isolation between the second annular groove 15 and the power chamber 8.

In the embodiment, a second annular groove is formed in the circumferential wall of the valve rod 2 and is positioned between the first annular groove 14 and the second annular groove 15, a second sealing ring 3 is sleeved on the second annular groove, and the second sealing ring 3 can completely seal a gap between the valve rod 2 and the cavity; when the first annular groove 14 is communicated with the second circulation passage 17, the second sealing ring 3 is positioned at the right side of the second circulation passage 17 to completely isolate the first annular groove 14 from the second annular groove 15; when the second annular groove 15 communicates with the second flow passage 17, the second seal ring 3 is located on the left side of the second flow passage 17, completely isolating the first annular groove 14 from the second annular groove 15.

The function of the second sealing ring 3 is to prevent water from flowing into the drip coffee pipeline when making capsule coffee, and also to prevent water from flowing into the capsule coffee pipeline when making drip coffee.

In the present embodiment, the circumferential wall of the valve rod 2 on the left side of the first annular groove 14 is not completely sealed with the circumferential wall of the cavity, so that the first annular groove 14 is communicated with the balance chamber 9.

In this embodiment the right-hand member of cavity is open, and the right-hand member of cavity adopts end cover 5 to seal, and the right-hand member of valve rod 2 passes through the connecting rod in this embodiment and contacts with the left side wall of end cover 5. In this embodiment, the right side of the end cap 5 is fixed by a retaining ring 6. In this embodiment, the right end of the first channel 16 is open, and the right end of the first channel 16 is closed by the steel ball 7. In this embodiment, the top end of the second channel 17 is closed, and the top end of the second channel 17 is closed by the first steel ball 7. Thereby facilitating the production and installation of the whole product.

In this embodiment the left end of valve rod 2 is opened there is the blind hole, and the right-hand member of spring 1 is connected with the right wall of blind hole, and the left end of spring 1 is connected with the left wall of balanced chamber 9. So that the left end of the valve stem 2 is in contact with the left wall of the cavity when making drip coffee, facilitating the positioning of the whole device, e.g. the valve stem 2, in relation to the second through-flow channel 17.

The specific working principle is as follows: during the use, the electromagnetic pump draws water from the water tank and gets into the boiler, and the export of boiler links to each other with inlet opening 11, and in water entered into power chamber 8 after passing through the boiler heating, the different flow output is realized to the flow size of control inlet opening 11 to realize the preparation of different coffee kinds, the control mode can be flow and the electromagnetic pump flow etc. of regulation and control boiler output.

The first outlet hole 12 is connected to the coffee capsule line. The second outlet hole 13 is connected with a drip coffee line.

When the capsule coffee is needed, the electromagnetic pump is in a low flow mode, and when the flow rate of water is low, the low flow rate of water can completely pass through the throttling hole 10, and the first annular groove 14 is completely isolated from the second annular groove 15 due to the communication between the balance cavity 9 and the first annular groove 14. According to Bernoulli's equation, the pressure of the power cavity 8 is consistent with the pressure in the water inlet hole 11, the first flow passage 16, the second flow passage 17, the first annular groove 14 and the balance cavity 9, and the pressure is in a low-pressure state. According to the stress condition (F bullet + P balance cavity A) P power cavity A, P is equal) of the valve rod 2, the two ends of the valve rod 2 are subjected to the same hydraulic pressure, so that the valve rod 2 keeps the original state, and the valve rod 2 cannot move and switch. When the capsule pressure slowly builds up, it also means that the pressure of the whole pipeline is built up, but the pressure at both ends of the valve rod 2 is kept consistent all the time, so that the valve rod 2 can not move, and therefore the capsule coffee is made.

The water flow path is that water with low flow rate enters the power cavity 8 through the water inlet hole 11, then enters the first circulation channel 16 through the throttle hole 10, then enters the second circulation channel 17, then enters the first annular groove 14, and then enters the capsule coffee pipeline through the first liquid outlet hole 12.

When drip coffee is required, the electromagnetic pump is in a high flow mode. High-flow-rate water enters the power cavity 8 through the water inlet hole 11, and the diameter of the water inlet hole 11 is larger than that of the throttle hole 10 due to the throttle hole 10. It can be known from bernoulli's equation that when the volume is constant, the mass is proportional to the pressure, because the flow velocity of the water flow is high, the orifice 10 cannot discharge all the water entering the power cavity 8 into the first circulation channel 16, which results in that the inflow mass in the power cavity 8 is greater than the outflow mass, the pressure in the power cavity 8 rises rapidly, the pressure in the power cavity 8 is greater than the pressures of the first circulation channel 16, the second circulation channel 17, the first annular groove 14 and the balance cavity 9, at this time, the stress condition of the valve rod 2 (F spring + P balance cavity a < P power cavity a), the valve rod 2 is subjected to a force to the left side, the valve rod 2 moves to the left side until the left end of the valve rod 2 contacts the left wall of the cavity, at this time, the second annular groove 15 is communicated with the second circulation channel 17, and the second liquid outlet 13 is communicated with the second annular groove 15.

The water flow process at this time is as follows: water with high flow rate enters the power cavity 8 through the water inlet hole 11, then enters the first circulation passage 16 through the throttling hole 10, then enters the second circulation passage 17, then enters the second annular groove 15, and then enters the drip coffee pipeline through the second liquid outlet hole 13, so that the drip coffee is manufactured.

After the drip coffee working mode is finished, the electromagnetic pump stops working, and along with the pressure reduction of the power cavity 8, when the stress on the left side of the valve rod 2 is larger than the stress on the right side, the valve rod 2 resets and returns to the initial state.

This device need not carry out the pipeline like the solenoid valve and switch, only need adjust the output of electromagnetic pump can, convenient to use also need not so expensive preparation of solenoid valve simultaneously, pure mechanical structure, production is simple, the low price.

It is emphasized here that it is necessary to ensure that the balancing chamber 9 communicates with the first annular groove 14, so that a uniform pressure is ensured in the balancing chamber 9, the first annular groove 14 and the power chamber 8, and the valve rod 2 does not move during the pressure slowing down. If the balance cavity 9 is directly communicated with the outside, after the pressure of the power cavity 8 is increased, the pressure is larger than the pressure of the balance cavity 9, and the valve rod 2 is still caused to move leftwards, so that the capsule coffee can not be made. If the balance cavity 9 is in a completely closed state, when the drip coffee is made, the pressure can be rapidly increased due to the fact that the balance cavity 9 is compressed, so that when the balance cavity A + F bounces to the power cavity P, the valve rod 2 cannot move any more, due to the fact that the pressure brought by high-flow-rate water flow in the power cavity 8 is limited, the compression space can bring rapid rise of the pressure, the valve rod 2 can only move a little bit of distance leftwards, the distance is not enough to enable the second annular groove 15 to be communicated with the second circulation channel 17, and the drip coffee cannot be made.

Finally, it should be noted that: the above embodiments are only used to illustrate the technical solution of the present invention, and not to limit the same; while the invention has been described in detail and with reference to the foregoing embodiments, it will be understood by those skilled in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some or all of the technical features may be equivalently replaced; such modifications and substitutions do not depart from the spirit and scope of the present invention, and they should be construed as being included in the following claims and description.