CN111188801B - Two-position six-way hydraulic control reversing valve - Google Patents

Abstract

The invention discloses a novel two-position six-way hydraulic control reversing valve, which comprises a valve body, a valve cavity is opened in the valve body, a valve core is embedded in the valve cavity, and three annular grooves are sequentially opened on the side of the valve core around the central axis of the valve core , the valve body is also provided with an oil inlet oil channel and a working oil channel that communicate with the valve cavity; a return spring is installed at one end of the valve core near the opening of the valve cavity, and the outer ring of the return spring is also set with a limit spacer. It is embedded in the valve cavity, the opening of the valve cavity is provided with a screw plug, the end of the valve body away from the opening of the valve cavity is provided with a control oil passage communicating with the valve cavity, and the end of the valve body close to the opening of the valve cavity is provided with a drain communicated with the valve cavity. The oil passage also includes an oil passage. The two ends of the oil passage are respectively connected to the control oil passage and the oil drain passage. The invention solves the problem that if the actuator connected to the two non-conductive oil passages behind the valve wants to follow up, it must be The problem is realized by adding valve parts between the two oil circuits.

Description

A two-position six-way hydraulic control reversing valve

technical field

The invention belongs to the technical field of hydraulics, and relates to a two-position six-way hydraulic control reversing valve.

Background technique

The two-position six-way reversing valve is generally used to switch between high and low pressure or between two mutually independent actuators. The graphic symbols of the existing two-position six-way reversing valve are generally as shown in Figure 2. This two-position six-way reversing valve is used for switching between two mutually independent actuators, and the non-conducting two-way oil circuit is separately sealed, and the corresponding actuator cannot act. If the actuator between the oil circuits needs to follow up, valve parts must be added between the two oil circuits to realize this. This solution increases the number of valve parts and reduces the reliability of the system.

SUMMARY OF THE INVENTION

The purpose of the present invention is to provide a two-position six-way hydraulically controlled reversing valve, which solves the problem that there is currently no two-position six-way reversing valve that communicates with each other between the two oil paths that are non-conductive behind the valve. If the actuator between the two oil circuits needs to follow up, a valve must be added between the two oil circuits to achieve the problem.

The technical scheme adopted in the present invention is: a two-position six-way hydraulically controlled reversing valve, comprising a valve body, a valve cavity is opened in the valve body, a valve core is embedded in the valve cavity, and the sides of the valve core are arranged around the central axis of the valve core in sequence. There are three annular grooves, and the valve body is also provided with an oil inlet oil channel and a working oil channel that communicate with the valve cavity;

A return spring is installed at one end of the valve core close to the opening of the valve cavity, and the outer ring of the return spring is also sleeved with a limit spacer, which is embedded in the valve cavity. One end of the cavity opening is provided with a control oil passage that communicates with the valve cavity, and one end of the valve body close to the valve cavity opening is provided with an oil drain passage that communicates with the valve cavity, and also includes an oil passage. Both ends of the oil passage are respectively connected to the control oil passage and Drain oil passage.

The feature of the present invention also lies in:

Among them, there are 6 oil passages in inlet oil passage and working oil passage. The 6 oil passages are divided into three groups. One group of oil passages is oil passage A and oil passage B, and the two groups of working oil passages are oil passage C, Oil passage D, oil passage E, oil passage F, in the normal position, oil passage A and oil passage B are connected with oil passage C and oil passage D respectively, and oil passage E and oil passage F are sealed; in the reversing position, the oil passage A and oil passage B communicate with oil passage E and oil passage F respectively, and oil passage C and oil passage D communicate with each other;

A sealing ring is also sleeved between the screw plug and the opening of the valve cavity;

A choke plug is also embedded in the oil passage, and a damping hole is arranged in the center of the choke plug;

The throttle plug is connected with the oil passage through a threaded structure.

The beneficial effects of the present invention are:

The two-position, six-way, hydraulically-controlled reversing valve of the present invention adopts hydraulic control, which ensures the reliability of the reversing of the two-position, six-way reversing valve, and does not require an additional power source for reversing; The two non-conducting oil circuits are connected to each other, which solves the problem that if the actuator connected to the non-conducting two oil circuits behind the valve wants to follow up, a valve must be added between the two oil circuits. question.

Description of drawings

Fig. 1 is the graphic symbol of a kind of two-position six-way hydraulic control reversing valve of the present invention;

Figure 2 is the graphic symbol of the existing two-position six-way reversing valve;

Figure 3 is a schematic structural diagram of a two-position, six-way hydraulically-controlled reversing valve of the present invention when it is in a normal position;

4 is a schematic structural diagram of a two-position, six-way hydraulically-controlled reversing valve of the present invention in the reversing position;

5 is a schematic structural diagram of a two-position, six-way hydraulically-controlled reversing valve of the present invention, wherein the oil passage is opened on the valve body;

FIG. 6 is a partial enlarged view of the oil passage in the two-position six-way hydraulic control reversing valve of the present invention, which is opened on the valve body.

In the figure, 1. Valve body, 2. Valve cavity, 3. Valve core, 4. Return spring, 5. Limiting spacer, 6. Screw plug, 7. Control oil passage, 8. Drain oil passage, 9. Throttle plug, 10. Sealing ring, 11. Oil passage A, 12. Oil passage B, 13. Oil passage C, 14. Oil passage D, 15. Oil passage E, 16. Oil passage F, 17. Oil passage.

Detailed ways

The present invention will be described in detail below with reference to the accompanying drawings and specific embodiments.

The present invention provides a two-position six-way hydraulically controlled reversing valve, as shown in Figures 1 and 3, comprising a valve body 1, a valve cavity 2 is opened in the valve body 1, and a valve core 3 is embedded in the valve cavity 2 , three annular grooves are opened on the side of the valve core 3 around the central axis of the valve core 3 in sequence, and the valve body 1 is also provided with an oil inlet oil channel and a working oil channel that communicate with the valve cavity 2. There are a total of 6 oil channels, and the 6 oil channels are divided into 6 oil channels. There are three groups, one oil inlet oil passage is oil passage A11 and oil passage B12, and two working oil passages are oil passage C13, oil passage D14 and oil passage E15, oil passage F16, in normal position, oil passage A11 and oil passage Channel B12 is connected with oil channel C13 and oil channel D14 respectively, and oil channel E15 and oil channel F16 are sealed; in the reversing position, oil channel A11 and oil channel B12 are respectively connected with oil channel E15 and oil channel F16, oil channel C13 and oil channel Road D14 is connected;

The return spring 4 is installed on the opening end of the valve core 3 close to the valve cavity 2, and the outer ring of the return spring 4 is also sleeved with a limit spacer 5, and the limit spacer 5 is embedded in the valve cavity 2, and the opening of the valve cavity 2 is provided with a The screw plug 6, the opening of the valve cavity 2 is provided with a threaded structure matched with the screw plug 6, the end of the screw plug 6 extending into the valve cavity 2 is close to the limit spacer 5, and the screw plug 6 and the opening of the valve cavity 2 are close to each other. A sealing ring 10 is also set between the valve body 1 to prevent oil leakage at the screw plug 6. The end of the valve body 1 away from the opening of the valve cavity 2 is provided with a control oil passage 7 that communicates with the valve cavity 2. The valve body 1 is close to the opening end of the valve cavity 2. A drain oil passage 8 communicated with the valve chamber 2 is provided, and an oil passage 17 is also provided. The oil passage 17 can be arranged on the valve core 3, and can also be separately arranged on the valve body 1 as shown in Fig. 5 and Fig. 6. The two ends of the passage 17 are respectively connected to the control oil passage 7 and the oil drain passage 8. The oil passage 17 is also provided with a choke plug 9, and a damping hole is arranged in the center of the choke plug 9. The choke plug 9 is connected to the oil passage 17 through a threaded structure. When the size of the damping hole needs to be adjusted according to the actual situation, it is only necessary to replace the throttle plug 9, and the throttle plug 9 can be provided with damping holes with different aperture sizes.

In the present invention, when assembling, first install the main valve core 3 in the valve cavity 2 opened in the valve body 1, and then put the return spring 4 into the valve cavity 2, and then reset the sleeve on the outer ring of the return spring 4. The spacer 5 is embedded in the valve cavity 2, and finally the screw plug 6 is tightened to press the sealing ring 10 to prevent oil leakage at the screw plug 6. The specific assembly relationship is shown in Figure 3;

The working principle of the present invention is:

The valve is generally used as a group of oil inlet oil passages (oil passage A11 and oil passage B12), and the movement of the valve core 3 is realized by controlling the oil in the oil passage 7 to switch the group of oil inlet oil passages (oil passages). A11 and oil channel B12) communicate with the other two groups of working oil channels (oil channel C13, oil channel D14 is a group, oil channel E15, oil channel F16 is another group) to realize a group of oil inlet control two Different actuators, in the principle of valve action, are driven by hydraulic control, and the left end of the valve core 3 can also be connected to an electromagnet, handle, ejector rod, roller, etc. to drive the valve core to reverse the direction. The working process is as follows:

1) In the normal position, no pressure oil passes through the control oil passage 7, and the valve core is pushed to the leftmost end of the valve cavity under the action of the spring force of the return spring. At this time, the oil passage A11 is connected with the oil passage C13, and the oil passage 12B is connected with the oil The channel D14 is turned on, and the oil channel 15E and the oil channel F16 are blocked. The state of the valve at this time is shown in Figure 3;

2) When reversing, the pressure oil enters the valve cavity 2 through the control oil passage 7 and acts on the left end of the spool 3. At this time, the return spring cavity at the right end of the spool 3 drains oil, and there is almost no pressure. The pressure difference between the two ends of the spool 3 Under the action, it moves to the right end until it reaches the limit position limited by the spacer on the right end, that is, after the high-pressure control oil overcomes the elastic force of the return spring 4, it can push the valve core 3 to move to the right until it reaches the position limited by the limit spacer 5, At this time, the oil passage A11 is connected to the oil passage E15, the oil passage B12 is connected to the oil passage F16, and the oil passage C13 and the oil passage D14 are connected. The actuator connected to the oil passage F16 moves, and the actuators connected to the oil passage C13 and the oil passage D14 can follow the connection of the oil passage C13 and the oil passage D14. The state of the valve at this time is shown in Figure 4;

3) During reset, the control oil in the control oil passage 7 is cut off, and the pressure oil in the control oil passage 7 is quickly released through the damping hole installed on the throttle plug 9 in the valve core 3, so that the valve core 3 is in the return spring. Under the action of the spring force of 4, it can quickly respond to the movement to the left end. Due to the movement of the spool 3, the volume of the valve cavity 2 at the left end of the spool 3 is reduced, and the excess hydraulic oil can be directly discharged to the oil drain passage 8 through the damping hole, so as to ensure the valve The valve cavity at the left end of the core 3 will not hold pressure and thus affect the commutation reliability. After the reset action is completed, the state of the valve is shown in Figure 3.

Claims (2)

1. The two-position six-way hydraulic control reversing valve is characterized by comprising a valve body (1), wherein a valve cavity (2) is formed in the valve body (1), a valve core (3) is embedded in the valve cavity (2), three annular grooves are sequentially formed in the side surface of the valve core (3) around the central shaft of the valve core (3), and an oil inlet oil duct and a working oil duct which are communicated with the valve cavity (2) are further formed in the valve body (1);

the valve core (3) is provided with a reset spring (4) close to one end of an opening of the valve cavity (2), the outer ring of the reset spring (4) is further sleeved with a limiting spacer bush (5), the limiting spacer bush (5) is embedded into the valve cavity (2), a screw plug (6) is arranged at the opening of the valve cavity (2), one end, far away from the opening of the valve cavity (2), of the valve body (1) is provided with a control oil duct (7) communicated with the valve cavity (2), one end, close to the opening of the valve cavity (2), of the valve body (1) is provided with an oil drainage duct (8) communicated with the valve cavity (2), and the valve core further comprises an oil duct (17), and two ends of the oil duct (17) are respectively communicated with the control oil duct (7) and the oil drainage duct (8);

a sealing ring (10) is sleeved between the screw plug (6) and the opening of the valve cavity (2);

a throttling plug (9) is further embedded in the oil duct (17), and a damping hole is formed in the center of the throttling plug (9); the throttle plug (9) is connected with the oil passage (17) through a thread structure.

2. The two-position six-way hydraulic control reversing valve according to claim 1, wherein the oil inlet oil passage and the working oil passage comprise 6 oil passages, the 6 oil passages are divided into three groups, one group of oil inlet oil passage is an oil passage A (11) and an oil passage B (12), the two groups of working oil passages are an oil passage C (13), an oil passage D (14), an oil passage E (15) and an oil passage F (16), the oil passage A (11) and the oil passage B (12) are respectively communicated with the oil passage C (13) and the oil passage D (14) in normal position, and the oil passage E (15) and the oil passage F (16) are sealed; the oil passage A (11) and the oil passage B (12) are respectively communicated with the oil passage E (15) and the oil passage F (16) during bit changing, and the oil passage C (13) is communicated with the oil passage D (14).

Images