CN214007643U

CN214007643U - Hydraulic combination valve based on sequential decompression and overflow functions

Info

Publication number: CN214007643U
Application number: CN202023274257.6U
Authority: CN
Inventors: 徐建江; 姚广山; 李禧; 高魏磊
Original assignee: Sks Hydraulic Technology Co ltd
Current assignee: Sks Hydraulic Technology Co ltd
Priority date: 2020-12-30
Filing date: 2020-12-30
Publication date: 2021-08-20
Anticipated expiration: 2030-12-30

Abstract

The utility model discloses a hydraulic combination valve based on sequential decompression overflow function, which comprises a valve sleeve, a valve core and a pressure spring, wherein the valve sleeve is formed with a valve cavity, and a high-pressure oil P port, a secondary pressure B port and an oil return T port are formed on the valve sleeve; the valve core is provided with a central oil duct from the bottom surface; an annular control groove is processed on the circumferential surface of the valve core, a pressure oil port for radially communicating the port P with the central oil duct is arranged in the annular control groove, and a connecting oil hole for communicating the central oil duct with the port B after the valve core moves upwards is further processed on the valve core; the control edge of the annular control groove and the opening edge of the port P form a throttling area for realizing the pressure reduction function of the valve when the valve core moves upwards, and an upper shoulder with longitudinal sections at two sides and a lower shoulder positioned below the upper shoulder are formed on the valve core; when the valve core is in an original state, the port B is communicated with the port T, and when the valve core moves upwards, the longitudinal section is matched with the inner shoulder of the valve sleeve to form a damping channel which can enable part of oil in the port B to flow back to the port T and is used for realizing the overflow function of the valve.

Description

Hydraulic combination valve based on sequential decompression and overflow functions

Technical Field

The utility model belongs to the technical field of the hydraulic control technique and specifically relates to a hydrovalve with combined function, specifically speaking are hydraulic pressure combination valve based on order decompression overflow function.

Background

The hydraulic valve is widely used in hydraulic equipment and hydraulic elements and is divided into a plate type, a tubular type and a plug-in type. Cartridge hydraulic valves are used in a large number of compact hydraulic components due to the spatial constraints of the equipment and components. Especially in the hydraulic rotary motor, the hydraulic rotary motor has small volume and convenient installation, and can greatly save space and be widely used. However, most rotary motors have a separate cartridge valve for each function, which requires a high space requirement for the cartridge body. Often, many cartridge valves of dense hemp are arranged on the valve body, which brings troubles to use, installation and subsequent maintenance.

Disclosure of Invention

The utility model aims to solve the technical problem to the current situation of above-mentioned prior art, and provide small, spare part is few, compact structure to can realize the hydraulic pressure combination valve based on order decompression overflow function of order decompression overflow.

The utility model provides a technical scheme that above-mentioned technical problem adopted does:

a hydraulic combination valve based on a sequential pressure reduction and overflow function comprises a valve sleeve and a valve core, wherein the valve sleeve is formed with a valve cavity, the valve core is arranged in the valve cavity of the valve sleeve in a sliding mode, a pressure spring used for applying pre-tightening pressure to the valve core is installed in the valve cavity, and a high-pressure oil P port, a secondary pressure B port and an oil return T port are formed on the circumferential surface of the valve sleeve from bottom to top; the valve core is provided with a central oil duct which can enable hydraulic oil to enter from the bottom surface along the axis to push the valve core to overcome the resistance of the pressure spring to move upwards; a concave annular control groove is circumferentially processed on the peripheral surface of the valve core at the position corresponding to the port P, a pressure oil port for radially communicating the port P with the central oil duct is arranged in the annular control groove, and a connecting oil hole for communicating the central oil duct with the port B after the valve core moves upwards is further processed on the valve core; the control edge of the annular control groove and the opening edge of the P port form a throttling area for realizing the pressure reduction function of the valve when the valve core moves upwards, and an upper shoulder with longitudinal sections on two sides and a lower shoulder which is positioned below the upper shoulder and is used for blocking the communication between the oil connecting hole and the B port when the valve core is in an original state are formed on the valve core; when the valve core is in an original state, the port B is communicated with the port T, and when the valve core moves upwards, the longitudinal section is matched with the inner shoulder of the valve sleeve to form a damping channel which can enable part of oil in the port B to flow back to the port T and is used for realizing the overflow function of the valve.

In order to optimize the technical scheme, the specific measures adopted further comprise:

the bottom of the valve cavity is a closed end, and a cavity opening of the valve cavity is spirally provided with a pressure regulating plug; the valve core is formed into a spring guide rod section for preventing the radial deviation of the pressure spring, the pressure spring is sleeved on the spring guide rod section of the valve core, the lower end of the pressure spring is connected with the valve core in a propping mode, and the upper end of the pressure spring is connected with the pressure regulating plug in a propping mode.

The valve sleeve is provided with an external thread for the plug-in type screw assembly with the valve hole of the mounting component, and the upper part of the valve sleeve is provided with a positioning boss which is in butt joint and positioning fit with the mounting component.

The sealing ring for preventing the oil leakage of the valve hole is sleeved below the positioning boss of the valve sleeve.

The diameter of the pressure oil port is smaller than the width of the annular control groove, an annular connecting groove is formed in the circumferential surface of the valve core, the connecting oil hole is formed in the annular connecting groove, and the diameter of the connecting oil hole is smaller than the width of the annular connecting groove.

An annular damping groove capable of guiding oil at the port B into the damping channel is formed between the lower shoulder and the upper shoulder.

The bottom surface of the valve core is radially provided with a bottom groove channel which can enable the hydraulic oil in the central oil duct to easily enter the bottom surface of the valve core.

The cross section of the positioning boss is hexagonal for being screwed by a wrench conveniently.

Compared with the prior art, the hydraulic compound valve of the utility model only comprises four parts of a valve sleeve, a valve core, a pressure spring and a pressure regulating plug. The valve core is provided with an annular control groove, the control edge of the annular control groove can be matched with the opening edge of the port P to realize the pressure reduction function of the valve, longitudinal sections are turned on two sides of the upper shoulder of the valve core, and the longitudinal sections can be matched with the inner shoulder of the valve sleeve to form a damping channel which can enable part of oil of the port B to flow back to the port T to realize the overflow function of the valve.

The utility model discloses a cartridge formula is connected, compact structure, required part is small in quantity to can realize the order decompression overflow function.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is a cross-sectional structural view of the valve cartridge of FIG. 1;

FIG. 3 is a schematic perspective view of the valve cartridge;

FIG. 4 is a schematic view of the throttle area of the valve opening of the present invention;

fig. 5 is a schematic perspective view of the present invention;

fig. 6 is a schematic view of the assembly structure of the present invention and the mounting member;

fig. 7 is a schematic view of the hydraulic principle of the present invention.

Detailed Description

Embodiments of the present invention are described in further detail below with reference to the accompanying drawings.

Fig. 1 to 7 are schematic diagrams of the structure and principle of the present invention.

Wherein the reference numerals are: the hydraulic control valve comprises an acting surface S, a sealing ring M, a damping channel Z, an annular damping groove Z1, a throttling area Ax, a control edge Lx, a port edge Lt, a valve sleeve 1, a valve cavity 1a, an inner shoulder 1b, an external thread 1c, a positioning boss 11, a valve core 2, a central oil passage 2a, an annular control groove 2b, a pressure oil port 2c, a connecting oil hole 2d, an annular connecting groove 2e, a bottom groove channel 2f, a spring guide rod section 21, an upper shoulder 22, a longitudinal tangent plane 22a, a lower shoulder 23, a pressure spring 3, a pressure regulating plug 4 and a mounting part 5.

As shown in the figure, the utility model discloses a hydraulic pressure combination valve based on order decompression overflow function, this valve adopt cartridge formula structure, can direct spiral cartridge to the valve opening of 5 processing of installing component, therefore simple to operate to simple swift. The mounting part 5 here may be a housing or other housing of the hydraulic motor. The valve is composed of four parts, and comprises a valve sleeve 1, a valve core 2, a pressure spring 3 and a pressure regulating plug 4. The valve housing 1 is axially formed with a valve cavity 1a with a closed bottom, and the valve core 2 is slidably disposed in the valve cavity 1a of the valve housing 1. The pressure spring 3 is also arranged in the valve cavity 1a, and the pressure spring 3 is used for applying downward pre-tightening pressure to the valve core 2, so that the valve core 2 is in an original state when the pressure of hydraulic oil is smaller than the spring force of the pressure spring 3, namely the state when the bottom surface of the valve core 2 is abutted against the bottom wall of the valve cavity 1 a. The pressure regulating plug 4 is spirally arranged at the orifice of the valve cavity 1a and is used for regulating the pre-tightening pressure of the pressure spring 3, thereby changing the pressure of the action of the valve core 2. The pressure spring 3 is pressed between the pressure regulating plug 4 and the valve core 2, in order to prevent the pressure spring 3 from radially deviating and influencing the stability of the valve opening, the valve core 2 is provided with a spring guide rod section 21, and the spring guide rod section 21 can provide a guide effect for the pressure spring 3. The pressure spring 3 is sleeved on the spring guide rod section 21 of the valve core 2, the lower end of the pressure spring 3 is connected with the valve core 2 in a propping mode, and the upper end of the pressure spring 3 is connected with the pressure regulating plug 4 in a propping mode.

As can be seen from fig. 1, the valve housing 1 of the present invention has a high pressure oil port P, a secondary pressure port B and an oil return port T formed on the circumferential surface thereof; and the port P, the port B and the port T are arranged on the valve sleeve 1 at intervals from bottom to top. The port P is a high-pressure hydraulic oil port of the hydraulic system, the port B is a secondary pressure oil port of the hydraulic system, and the port T is an oil return port of the hydraulic system, and the oil return port is connected with an oil tank. As can be seen from fig. 2, a central oil passage 2a is formed along the axis of the valve core 2 from the bottom surface, a concave annular control groove 2b is formed on the circumferential surface of the valve core 2 at the position corresponding to the P port in the circumferential direction, and a pressure oil port 2c for radially communicating the P port with the central oil passage 2a is formed in the annular control groove 2b, so that high-pressure oil at the P port can enter the central oil passage 2a through the annular control groove 2b and the pressure oil port 2c, and the high-pressure oil acts on the acting surface S of the valve core to push the valve core 2 to move upward against the resistance of the pressure spring 3. The valve core 2 is further provided with a connecting oil hole 2d which is used for communicating the central oil passage 2a with the port B after the valve core 2 moves upwards, so that high-pressure hydraulic oil entering the central oil passage 2a can flow to the port B of the secondary pressure through the connecting oil hole 2 d. The utility model discloses an annular control groove 2 b's limit can cooperate as control limit LX and the mouth limit LT of P mouth, forms throttle area AX when case 2 rebound, realizes the valve decompression function. The valve core 2 of the utility model is also formed with an upper shoulder 22 and a lower shoulder 23 with the same diameter. The lower land 23 is located below the upper land 22, and the position of the lower land 23 on the valve spool is capable of blocking the communication of the connecting oil hole 2d with the B port just when the valve spool 2 is in the original state (see the state in fig. 1). When the valve core 2 is in the original state, the port B is communicated with the port T. The utility model discloses an it is formed with longitudinal section 22a to go up 180 degrees longitudinal cutting at a distance on the circular bead 22, and longitudinal section 22a cooperatees with valve barrel 1's interior circular bead 1B when case rebound and is formed with damping channel Z, thereby damping channel Z enables the oil content reposition of redundant personnel of B mouth and partly returns the overflow function that T mouth realized the valve.

In the embodiment, the utility model discloses a shaping has the external screw thread 1c that is used for with the valve opening plug-in type spiral assembly of installing component 5 on the valve barrel 1 to the upper portion shaping of this valve barrel 1 has and connects location boss 11 with installing component 5 top. The positioning boss 11 is designed into a regular hexagon so as to be convenient for adopting a wrench to fasten the utility model to be fixed on the mounting part 5.

As shown in fig. 6, in order to prevent the oil leakage of the valve hole from the screw thread, the utility model discloses there is a seal ring groove in the below design of location boss 11, installs the sealing washer M that prevents the oil leakage of valve hole in this seal ring groove.

In the embodiment, the utility model discloses a pressure oil port 2 c's diameter is less than annular control groove 2 b's width, and the case 2 still the shaping has annular connecting groove 2e on global, connects the shaping of oilhole 2d in this annular connecting groove 2e to the diameter of connecting oilhole 2d is less than annular connecting groove 2 e's width.

In the embodiment, as can be seen from fig. 3, an annular damping groove Z1 capable of guiding the oil from port B into the damping channel Z is further formed between the lower shoulder 23 and the upper shoulder 22.

In the embodiment, the utility model discloses a radial processing in bottom surface of case 2 has the bottom channel 2f that enables the hydraulic oil among the central oil duct 2a to easily advance to case 2 bottom surface.

The utility model discloses a theory of operation is: the hydraulic oil enters the central oil passage 2a from the port P, and because the port P and the secondary pressure port B are separated by the lower shoulder 23 under the action of the pressure spring 3, the secondary pressure port B is communicated with the oil return port T at the moment, and the secondary pressure Br is zero. When the pressure of the hydraulic oil on the valve core 2 overcomes the pre-tightening pressure of the pressure spring 3 along with the increase of the pressure of the hydraulic oil, the valve core 2 starts to move upwards to open the lower shoulder 23, the hydraulic oil flows to the secondary pressure port B through the connecting oil hole 2d, and the hydraulic oil flows. The orifice side LT of the hydraulic oil P port of the valve sleeve 1 and the control side LX of the valve core 2 form a throttling area AX, so that the valve is decompressed. The decompressed pressure Br passes through the action surface S of the valve core 2 to enable the valve core 2 to move upwards to be balanced with the pressure spring 3. In addition, the oil at the opening B is shunted by a part of the oil return tank through the damping channel Z to form the overflow valve function of secondary pressure Br, so that the secondary pressure is not increased.

While the preferred embodiments of the present invention have been illustrated, various changes and modifications may be made by those skilled in the art without departing from the scope of the present invention.

Claims

1. The hydraulic combination valve based on the sequential pressure reduction and overflow function comprises a valve sleeve (1) formed with a valve cavity (1a) and a valve core (2) arranged in the valve cavity (1a) of the valve sleeve (1) in a sliding mode, and is characterized in that: a pressure spring (3) for applying pre-tightening pressure to the valve core (2) downwards is arranged in the valve cavity (1a), and a high-pressure oil P port, a secondary pressure B port and an oil return T port are formed on the circumferential surface of the valve sleeve (1) from bottom to top; the valve core (2) is provided with a central oil duct (2a) which can enable hydraulic oil to enter from the bottom surface along the axis to push the valve core (2) to move upwards against the resistance of the pressure spring (3); a concave annular control groove (2B) is circumferentially processed on the peripheral surface of the valve core (2) at a position corresponding to the P port, a pressure oil port (2c) for radially communicating the P port with the central oil duct (2a) is arranged in the annular control groove (2B), and a connecting oil hole (2d) for communicating the central oil duct (2a) with the B port after the valve core (2) moves upwards is further processed on the valve core (2); a throttle Area (AX) for realizing the valve decompression function is formed by a control edge (LX) of the annular control groove (2B) and a port edge (LT) of the port P when the valve core (2) moves upwards, an upper shoulder (22) with longitudinal tangent planes (22a) at two sides and a lower shoulder (23) which is positioned below the upper shoulder (22) and is used for blocking the communication between the oil connecting hole (2d) and the port B when the valve core (2) is in an original state are formed on the valve core (2); when the valve core is in an original state, the port B is communicated with the port T, and the longitudinal section (22a) is matched with the inner shoulder (1B) of the valve sleeve (1) when the valve core moves upwards to form a damping channel (Z) which can enable part of oil in the port B to return to the port T for realizing the overflow function of the valve.

2. The hydraulic compound valve based on the sequential decompression overflow function as claimed in claim 1, wherein: the bottom of the valve cavity (1a) is a closed end, and a pressure regulating plug (4) is spirally arranged at the cavity opening of the valve cavity (1 a); the valve core (2) is formed into a spring guide rod section (21) for preventing the radial deviation of the pressure spring (3), the pressure spring (3) is sleeved on the spring guide rod section (21) of the valve core (2), the lower end of the pressure spring (3) is connected with the valve core (2) in a jacking mode, and the upper end of the pressure spring (3) is connected with the pressure regulating plug (4) in a jacking mode.

3. The hydraulic compound valve based on the sequential decompression overflow function as claimed in claim 2, wherein: the valve sleeve (1) is formed with an external thread (1c) which is used for being spirally assembled with a valve hole plug-in type of the mounting component (5), and the upper part of the valve sleeve (1) is formed with a positioning boss (11) which is connected with the mounting component (5) in a jacking and positioning matching mode.

4. The hydraulic compound valve based on the sequential decompression overflow function as claimed in claim 3, wherein: and a sealing ring (M) for preventing the oil leakage of the valve hole is sleeved below the positioning boss (11) of the valve sleeve (1).

5. The hydraulic compound valve based on the sequential decompression overflow function as claimed in claim 4, wherein: the diameter of the pressure oil port (2c) is smaller than the width of the annular control groove (2b), an annular connecting groove (2e) is formed in the circumferential surface of the valve core (2), the connecting oil hole (2d) is formed in the annular connecting groove (2e), and the diameter of the connecting oil hole (2d) is smaller than the width of the annular connecting groove (2 e).

6. The hydraulic compound valve based on the sequential decompression overflow function as claimed in claim 5, wherein: an annular damping groove (Z1) which can guide the oil of the port B into the damping channel (Z) is formed between the lower shoulder (23) and the upper shoulder (22).

7. The hydraulic compound valve based on the sequential decompression overflow function as claimed in claim 6, wherein: and a bottom groove channel (2f) which can enable hydraulic oil in the central oil duct (2a) to easily enter the bottom surface of the valve core (2) is radially processed on the bottom surface of the valve core (2).

8. The hydraulic compound valve based on the sequential decompression overflow function as claimed in claim 7, wherein: the cross section of the positioning boss (11) is hexagonal which is convenient to screw by a wrench.