Two-position three-way valve

Abstract

The utility model relates to the technical field of air valves, in particular to a two-position three-way valve. Comprising a valve body, an air inlet cavity, a first working cavity, a second working cavity and a main sliding valve which are communicated are arranged in the valve body, and when the main sliding valve is in a first working state, the air inlet cavity is communicated with the first working cavity, and the air inlet cavity and the second working cavity are sealed; when the main sliding valve is in a second working state, the air inlet cavity is communicated with the second working cavity, the air inlet cavity and the first working cavity are sealed, a main valve cavity is further formed between the inner wall of the valve body and the main sliding valve and connected with a pilot valve, the pilot valve comprises a slidable pilot valve element, one end of the pilot valve element is located in a spring cavity, and an inlet is formed in the spring cavity and connected with a high-pressure air port; an outlet is formed close to the middle of the pilot valve element and communicated with the main valve cavity, and an exhaust port is formed in the lower portion of the pilot valve element. Working state switching is achieved through small external force applied to the pilot valve element, the structural layout is clear, working state switching is achieved through small external force, and the pilot valve is suitable for the field of special vehicle exploration.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of gas valve, concretely is a two-position three-way valve. BACKGROUND

[0002] The two-position three-way valve is needed when a certain special vehicle is used for transmitting goods in geological exploration, the goods contact the two-position three-way valve and cause the main valve cavity channel to reverse and push the goods to continue to move forward, the existing two-position three-way valve needs large reversing external force, and the force when the goods contact the two-position three-way valve is smaller than the reversing external force, so the force when the goods contact the two-position three-way valve is not enough to make the main valve cavity reverse, and the goods are stuck in the transportation channel, therefore, a two-position three-way valve with small reversing external force is urgently needed. SUMMARY

[0003] The problem to be solved provides a two-position three-way valve with small reversing external force.

[0004] To achieve the above object, the utility model provides the following technical scheme: a two-position three-way valve, including the valve body, the valve body is equipped with the intercommunication air inlet chamber, work cavity one and work cavity two, the main slide valve is connected in the valve body and has the first working condition and the second working condition, when the main slide valve is in the first working condition, the air inlet chamber is communicated with work cavity one, and the air inlet chamber is sealed with work cavity two, when the main slide valve is in the second working condition, the air inlet chamber is communicated with work cavity two, and the air inlet chamber is sealed with work cavity one, the inner wall of the valve body and the main slide valve are further equipped with the main valve cavity, and the main valve cavity is connected with the pilot valve, the pilot valve includes the slidable pilot valve core, one end of the pilot valve core is located in the spring cavity, the spring cavity is equipped with the inlet, and the inlet is connected with the high pressure gas port, the middle part of the pilot valve core is equipped with the outlet, the outlet is communicated with the main valve cavity, and the lower part of the pilot valve core is equipped with the exhaust port.

[0005] Preferably, the main slide valve is provided with a protruding part one corresponding to the position of the work cavity one, and a sealing ring one is clamped on one side of the protruding part one in contact with the work cavity one; the main slide valve is provided with a protruding part two corresponding to the position of the work cavity two, and a sealing ring two is clamped on one side of the protruding part two in contact with the work cavity two.

[0006] Preferably, one end of the main slide valve away from the main valve cavity is connected with the valve body through the main spring, and the end of the main slide valve connected with the main spring is sealed and slid with the valve body through the sealing ring four.

[0007] Preferably, the pilot valve core is provided with a sealing ring five, the sealing ring five is in contact with or away from the inlet along with the sliding of the pilot valve core; the pilot valve core is provided with a sealing ring seven, and the sealing ring seven makes the outlet communicated with the exhaust port or cut off along with the sliding of the pilot valve core.

[0008] Preferably, the pilot valve is sealed and connected with the valve body through the sealing ring six.

[0009] The pilot valve core is arranged at one end of the exhaust port to protrude out of the valve body, the valve body is provided with a touch rod, and the touch rod is abutted against the pilot valve core and pushes the pilot valve core to slide to realize the communication of the inlet, the outlet and the main valve cavity when the touch rod is subjected to external force.

[0010] Compared with the prior art, the two-position three-way valve has the following beneficial effects: the switching between the first working state and the second working state is realized through one moving action of the main spool and the action of the main spring; the movement of the main spool is realized by the movement of the pilot valve core, the pilot valve core is actuated to make the main valve cavity filled with high-pressure gas to push the main spool to move and realize the switching of the gas circuit; the actuation of the pilot valve core is realized by the touch rod subjected to small external force; therefore, the two-position three-way valve can realize the switching between the first working state and the second working state by the touch rod subjected to small external force, the whole structure layout is clear, the required external force for the working state switching is small, and the problems in the background art are better solved. BRIEF DESCRIPTION OF DRAWINGS

[0011] Figure 1 It is a side view of the utility model;

[0012] Figure 2 It is a front view of the utility model;

[0013] Figure 3 It is a first working state cross-sectional view related to the utility model;

[0014] Figure 4 It is a first working state pilot valve cross-sectional view of the utility model;

[0015] Figure 5 It is a second working state cross-sectional view related to the utility model;

[0016] Figure 6 It is a second working state pilot valve cross-sectional view of the utility model;

[0017] The drawing mark explanation: 1, valve body; 11, main spool; 12, main valve cavity; 13, protruding part one; 14, protruding part two; 15, sealing ring one; 16, sealing ring two; 17, sealing ring three; 18, main spring; 19, sealing ring four; 2, inlet cavity; 3, working cavity one; 4, working cavity two; 5, high-pressure gas port; 6, touch rod; 7, pilot valve; 71, pilot valve core; 72, inlet; 73, spring cavity; 74, sealing ring five; 75, sealing ring six; 76, outlet; 77, sealing ring seven; 78, exhaust port. DETAILED DESCRIPTION

[0018] The technical scheme in the utility model embodiment will be described below in combination with the drawings in the utility model embodiment:

[0019] The utility model provides a two-position three-way valve used by a special vehicle during geological exploration, comprising a valve body 1, wherein the valve body 1 is provided with an air intake chamber 2, a working chamber 1 3 and a working chamber 2 4 which are connected to each other, the air intake chamber 2 being located between the working chamber 1 3 and the working chamber 2 4, a main slide valve 11 being slidably connected in the valve body 1 and the main slide valve 11 having a first working state and a second working state, the first working state being the initial state of the valve body 1, the gas flow direction thereof being as shown at A in 3, the gas shown at A enters the working chamber 1 3 from the air intake chamber 2, the main slide valve 11 separating the air intake chamber 2 from the working chamber 2 4, that is, when the main slide valve 11 is in the first working state, the air intake chamber 2 is connected to the working chamber 1 3, and the air intake chamber 2 is sealed from the working chamber 2 4; after the main slide valve 11 slides in the first working state position, the main slide valve 11 switches to the second working state, and the gas flow direction on the side of the main slide valve 11 in the second working state is as shown at A in 3 Figure 5 As shown at B in the figure, the gas at B enters working chamber 2 4 from intake chamber 2, which is sealed from working chamber 1 3. In other words, the position of main slide valve 11 determines whether intake chamber 2 communicates with working chamber 1 3 or with working chamber 2 4. Specifically, main slide valve 11 is provided with protrusion 13 at the position corresponding to working chamber 1 3, and sealing ring 15 is secured on the side of protrusion 13 that contacts working chamber 1 3. Main slide valve 11 is provided with protrusion 14 at the position corresponding to working chamber 2 4, and sealing ring 16 is secured on the side of protrusion 14 that contacts working chamber 2 4. Sealing ring 16 is positioned opposite sealing ring 15. The cross-section of working chamber 1 3 is larger than that of protrusion 13, allowing protrusion 13 to slide in working chamber 3. Similarly, the cross-section of working chamber 2 4 is larger than that of protrusion 14, allowing protrusion 14 to slide in working chamber 2 4. The sliding of the main slide valve 11 is due to the main valve chamber 12 being provided between the inner wall of the valve body 1 and the main slide valve 11. The main valve chamber 12 is located in the area surrounded by the groove portion at one end of the main slide valve 11 and the inner wall of the valve body 1. The main valve chamber 12 can admit high-pressure gas. When the main valve chamber 12 does not admit high-pressure gas, the main slide valve 11 is in the first working state. The sealing ring 15 and the working chamber 13 are away from the air inlet chamber 2 and are in communication with the working chamber 13. The sealing ring 2 16 and the inner wall of the working chamber 24 close to the air inlet chamber 2 are pressed against each other to seal the air inlet chamber 2 and the working chamber 24. The high-pressure gas that can be admitted to the main valve chamber 12 After the compressed gas, the main slide valve 11 is pushed to move and switch to the second working state. The main slide valve 11 switches from the second working state to the first working state due to the setting of the main spring 18. The main spring 18 is located at the end of the main slide valve 11 that is different from the main valve chamber 12. One end of the main spring 18 is connected to the inner wall of the valve body 1 and the other end is sleeved on the main slide valve 11. The end of the main slide valve 11 connected to the main spring 18 is sealed and slid with the valve body 1 through the sealing ring four 19, and the sealing of the left side of the working chamber two 4 is also achieved; the other end of the main slide valve 11 is sealed and slides along the inner wall of the valve body 1 through the sealing ring three 17.

[0020] The main valve chamber 12 is connected to the outlet 76 of the pilot valve 7. The pilot valve 7 also includes a slidable pilot valve core 71. One end of the pilot valve core 71 is located within a spring chamber 73 and is sheathed with a spring. The spring chamber 73 is provided with an inlet 72, which is connected to the high-pressure gas port 5, which in turn receives high-pressure gas. An outlet 76 is located near the center of the pilot valve core 71 and communicates with the main valve chamber 12. An exhaust port 78 is located at the bottom of the pilot valve core 71. A sealing ring 74, mounted on the pilot valve core 71, abuts against or separates from the inlet 72 as the pilot valve core 71 slides. A sealing ring 77, mounted on the pilot valve core 71, connects or disconnects the outlet 76 from the exhaust port 78 as the pilot valve core 71 slides. The sealed connection between the pilot valve 7 and the valve body 1 is achieved via a sealing ring 75. The sliding of the pilot valve core 71 is driven by the feeler rod 6, which is connected to the valve body 1 and is located below the pilot valve core 71. The pilot valve core 71 extends out of the valve body 1 at one end of the exhaust port 78 so as to be connected to the feeler rod 6. The feeler rod 6 does not contact the pilot valve core 71 in its natural state. At this time, the sealing ring 5 74 separates the inlet 72 from the outlet 76, and the outlet 76 is connected to the exhaust port 78. No high-pressure gas will flow into the main valve chamber 12, and the main slide valve 11 is in the first working state. In the first working state, the high-pressure gas in the pilot valve 7 moves as shown in the figure. Figure 3 As shown at point C in the middle, the sealing ring 5 74 separates the inlet 72 from the outlet 76; when the touch rod 6 is subjected to external force, it abuts against the pilot valve core 71 and pushes the pilot valve core 71 to slide upward, and the sealing ring 5 74 connects the inlet 72 with the outlet 76 as it moves upward. The sealing ring 77 slides upward with the pilot valve core 71 to disconnect the outlet 76 from the exhaust port 78, and the high-pressure gas flows into the main valve chamber 12 through the high-pressure gas port 5, the inlet 72, and the outlet 76. The high-pressure gas pushes the main slide valve 11 to switch to the second working state. The direction of the high-pressure gas in the second working state is as shown in FIG. Figure 5 As shown at D in the figure, high-pressure gas flows into the main valve chamber 12. It should be noted that the movement of the main spool valve 11 from the first working state to the second working state requires the high-pressure gas in the main valve chamber 12 to overcome the elastic force of the main spring 18. In the traditional solution, an external force directly acts on the main spool valve 11 to switch the working state. In this case, the external force needs to overcome the elastic force of the main spring 18 and the gas pressure, which requires a relatively large external force. However, the external force provided by this solution is relatively small, so a pilot valve 7 is added. This small external force can easily connect the pilot valve 7 to the high-pressure gas source, which pushes the main spool valve 11 to slide and switch the working state, thus achieving the purpose of the present invention.

[0021] In use, the high-pressure gas port 5 continuously supplies high-pressure gas, in the first working state, the inlet cavity 2 is communicated with the working cavity one 3, the contact rod 6 does not contact the pilot valve core 71, the outlet 76 is communicated with the exhaust port 78, the sealing ring five 74 separates the inlet 72 from the outlet 76, and the high-pressure gas cannot flow into the main valve cavity 12; when it is needed to switch to the second working state, the contact rod 6 is abutted against the pilot valve core 71 and pushes the pilot valve core 71 to move upward under the action of a small external force, the inlet 72 is communicated with the outlet 76, the outlet 76 is separated from the exhaust port 78 by the sealing ring seven 77, the high-pressure gas flows into the main valve cavity 12 through the high-pressure gas port 5, the inlet 72 and the outlet 76, the high-pressure gas in the main valve cavity 12 pushes the main spool 11 to move against the elastic force of the main spring 18, so that the inlet cavity 2 is communicated with the working cavity two 4, the inlet cavity 2 is sealed with the working cavity one 3, and the main spool 11 is in the second working state; when the second working state is switched back to the first working state, the small external force acting on the contact rod 6 disappears and releases the pilot valve core 71, the sealing ring five 74 separates the inlet 72 from the outlet 76, the outlet 76 is communicated with the exhaust port 78, the high-pressure gas in the main valve cavity 12 is discharged into the atmosphere through the outlet 76 and the exhaust port 78, and the main spring 18 pushes the main spool 11 to return to the first working state.

[0022] The above 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 protection scope of the present application.

Claims

1. A two-position three-way valve, comprising a valve body (1), wherein the valve body (1) is provided with an air intake chamber (2), a first working chamber (3) and a second working chamber (4) which are connected to each other, a main slide valve (11) being slidably connected in the valve body (1) and having a first working state and a second working state, wherein when the main slide valve (11) is in the first working state, the air intake chamber (2) and the first working chamber (3) are connected to each other, and the air intake chamber (2) and the second working chamber (4) are sealed; and when the main slide valve (11) is in the second working state, the air intake chamber (2) and the second working chamber (4) are connected to each other, and the air intake chamber (2) and the first working chamber (3) are sealed, characterized in that: A main valve chamber (12) is further provided between the inner wall of the valve body (1) and the main slide valve (11). The main valve chamber (12) is connected to the pilot valve (7). The pilot valve (7) includes a slidable pilot valve core (71). One end of the pilot valve core (71) is located in the spring chamber (73). The spring chamber (73) is provided with an inlet (72), and the inlet (72) is connected to the high-pressure gas port (5). An outlet (76) is provided near the middle of the pilot valve core (71), and the outlet (76) is communicated with the main valve chamber (12). An exhaust port (78) is provided at the lower portion of the pilot valve core (71).

2. The two-position three-way valve according to claim 1, characterized in that: The main slide valve (11) is provided with a protrusion (13) at a position corresponding to the working chamber (3), and a sealing ring (15) is clamped on the side where the protrusion (13) contacts the working chamber (3); the main slide valve (11) is provided with a protrusion (14) at a position corresponding to the working chamber (4), and a sealing ring (16) is clamped on the side where the protrusion (14) contacts the working chamber (4).

3. The two-position three-way valve according to claim 2, characterized in that: One end of the main slide valve (11) that is different from the main valve chamber (12) is connected to the valve body (1) through the main spring (18). The end of the main slide valve (11) that is connected to the main spring (18) is sealed and slidable with the valve body (1) through a sealing ring (19).

4. The two-position three-way valve according to claim 3, characterized in that: A sealing ring (74) is provided on the pilot valve core (71), and the sealing ring (74) contacts or separates from the inlet (72) as the pilot valve core (71) slides; a sealing ring (77) is provided on the pilot valve core (71), and the sealing ring (77) connects or disconnects the outlet (76) and the exhaust port (78) as the pilot valve core (71) slides.

5. The two-position three-way valve according to claim 4, characterized in that: The pilot valve (7) is sealed and connected to the valve body (1) via a sealing ring (75).

6. The two-position three-way valve according to claim 1, characterized in that: One end of the pilot valve core (71) provided with an exhaust port (78) extends out of the valve body (1). The valve body (1) is provided with a touch rod (6). When the touch rod (6) is subjected to an external force, it abuts against the pilot valve core (71) and pushes the pilot valve core (71) to slide, thereby achieving communication between the inlet (72), the outlet (76) and the main valve chamber (12).

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