High-pressure internal throttling bidirectional hydraulic lock

Abstract

The utility model provides a high-pressure internal throttling bidirectional hydraulic lock, and belongs to the technical field of control valves. The problems that in the prior art, a hydraulic valve is difficult to assemble, and impurities enter a sliding fit clearance are solved. The double-one-way valve comprises a valve body, a connector body, valve elements and a plunger, a double-one-way valve cavity with two through sides is formed in the valve body, the plunger is installed in the center of the double-one-way valve cavity, the number of the valve elements is two, the valve elements are symmetrically installed in the double-one-way valve cavity on the two sides of the plunger, and sealing steps are installed on the inner sides of the valve elements. The sealing step is installed between the plunger and the valve element and connected with the plunger and the valve element in a sealed mode, a spring cavity is formed in the valve element, a spring assembly is installed in the spring cavity, the connector body is installed in a double-one-way valve cavity on the outer side of the valve element, a spring groove is formed in the end face of the inner side of the plug body, and the spring assembly is connected with the end face of the spring groove. The utility model has the advantages of fewer parts, high stability, uniform pressure and strong sealing performance.

Description

Technical Field

[0001] This utility model belongs to the field of control valve technology and relates to a high-pressure internal throttling bidirectional hydraulic lock. Background Technology

[0002] Hydraulic locks are special valves for hydraulic systems. Their core function is to lock the oil circuit, preventing the actuators from moving or sinking when not in operation, thus ensuring positional stability and system safety.

[0003] Chinese patent publication number CN207621100U discloses a hydraulic lock, including a lock body and hydraulic valves symmetrically arranged within the lock body. The hydraulic valves include a valve body and a valve core located inside the valve body. The valve body is provided with an A-type flow divider hole. An oil hole is opened on the lock body and communicates with the A-type flow divider hole of the hydraulic valve. The front end of the oil hole abuts against the valve core of the hydraulic valve, and the rear end extends out of the valve body. A push rod is symmetrically arranged outside the valve body. The valve body is provided with a limit protection section. The limit protection section has a hollow structure. The front end is fixedly connected to the valve body, and the rear end has an annular surface. The front end of the push rod passes through the internal cavity of the limit protection section and abuts against the valve core. When the rear end is pushed to the limit position, it abuts against the annular surface of the limit protection section. The limit protection section has a B-type flow divider hole on its side wall that communicates with the oil hole on the lock body.

[0004] The hydraulic lock provided by this patent uses a moving structure of push rod and sliding block, which increases the assembly complexity and makes it easy for oil impurities to get into the sliding fit gap, resulting in movement jamming. Utility Model Content

[0005] The purpose of this invention is to address the aforementioned problems in the existing technology by providing a high-pressure internal throttling bidirectional hydraulic lock.

[0006] The objective of this utility model can be achieved through the following technical solution: A high-pressure internal throttling bidirectional hydraulic lock includes a valve body, a connector body, a valve core, and a plunger. The valve body has a double one-way valve chamber that runs through both sides. The double one-way valve chambers are arranged symmetrically. The plunger is installed at the center of the double one-way valve chambers. The valve core has a cylindrical stepped diameter-changing structure. There are two valve cores, which are symmetrically installed inside the double one-way valve chambers on both sides of the plunger. A sealing step is installed on the inner side of the valve core. The sealing step is installed between the plunger and the valve core and is sealed to both the plunger and the valve core respectively. A spring chamber is opened in the valve core. A spring assembly is installed in the spring chamber. The connector body is installed in the double one-way valve chamber outside the valve core. One end of the connector body is sleeved on the outside of the valve core and the other end extends out of the double one-way valve chamber. An installation hole is opened in the connector body. A plug body is connected to the installation hole. A spring groove is opened on the inner end face of the plug body. The spring assembly is connected to the end face of the spring groove.

[0007] In the aforementioned high-pressure internal throttling bidirectional hydraulic lock, the valve body is provided with an upper oil port and a lower oil port, and the number of the upper oil port and the lower oil port are two and arranged horizontally symmetrically. The upper oil port is connected to the double one-way valve chamber near the outer side, and the lower oil port is connected to the double one-way valve chamber near the inner side.

[0008] In the aforementioned high-pressure internal throttling bidirectional hydraulic lock, a first sealing ring is sleeved in the connector body, and the first sealing ring is installed between the connector body and the inner wall of the outer end of the double one-way valve chamber.

[0009] In the above-mentioned high-pressure internal throttling bidirectional hydraulic lock, a first sealing groove is provided on the outer periphery of the sealing step, and a retaining ring and a second sealing ring are fixedly installed in the sealing groove.

[0010] In the above-mentioned high-pressure internal throttling bidirectional hydraulic lock, a second sealing groove is provided on the outer periphery of the plunger, and a third sealing ring is fixedly installed in the second sealing groove.

[0011] In the aforementioned high-pressure internal throttling bidirectional hydraulic lock, a third sealing groove is provided in the plug body, and a fourth sealing ring is installed in the third sealing groove.

[0012] Compared with the prior art, the high-pressure internal throttling bidirectional hydraulic lock provided by this utility model has the following beneficial effects: 1. The valve body adopts a symmetrical structure of double one-way valve chambers with double-sided through-holes and the plunger is arranged in the center, so that the force of the high-pressure oil is evenly distributed inside the valve body; 2. The structure of direct cooperation between valve core, spring assembly and plunger is adopted to reduce the number of parts, avoid jamming and wear risks, and improve stability; 3. A three-stage sealing system is adopted to extend the pressure holding time and improve the sealing reliability. Attached Figure Description

[0013] Figure 1 This is a schematic cross-sectional view of the present invention;

[0014] Figure 2 This is a schematic diagram of the exploded structure of this utility model.

[0015] In the diagram: 1. Valve body; 11. Double one-way valve chamber; 12. Upper oil port; 13. Lower oil port; 2. Connector body; 21. Mounting hole; 22. First sealing ring; 3. Valve core; 31. Spring chamber; 4. Plunger; 41. Second sealing groove; 42. Third sealing ring; 5. Sealing step; 51. First sealing groove; 52. Retaining ring; 53. Second sealing ring; 6. Spring assembly; 7. Plug body; 71. Spring groove; 72. Third sealing groove; 73. Fourth sealing ring. Detailed Implementation

[0016] The following are specific embodiments of the present invention, which are described in conjunction with the accompanying drawings. However, the present invention is not limited to these embodiments.

[0017] like Figures 1 to 2 As shown, this embodiment includes a valve body 1, a connector body 2, a valve core 3, and a plunger 4. The valve body 1 has a double one-way valve chamber 11 with both sides open and arranged symmetrically. The plunger 4 is installed at the center of the double one-way valve chamber 11. Two valve cores 3 are symmetrically installed inside the double one-way valve chambers 11 on both sides of the plunger 4. The valve core 3 has a cylindrical stepped diameter-changing structure. A sealing step 5 is installed in the double one-way valve chamber 11 inside the valve core 3, and the sealing step 5 is installed between the plunger 4 and the valve core 3. The sealing step 5 is sealed to the plunger 4 and the valve core 3 respectively. The valve core 3 has an outward-facing spring cavity 31. The spring assembly 6 is installed in the spring cavity 31. The connector body 2 is installed in the double one-way valve cavity 11 outside the valve core 3. One end of the connector body 2 is sleeved on the outside of the valve core 3 and the other end extends out of the double one-way valve cavity 11. The connector body 2 has an installation hole 21. A plug body 7 is connected in the installation hole 21. A spring groove 71 is opened on the inner end face of the plug body 7. The spring assembly 6 is connected to the end face of the spring groove 71.

[0018] like Figure 1 middle Figure 2 As shown, the valve body 1 is provided with an upper oil port 12 and a lower oil port 13. There are two upper oil ports 12 and two lower oil ports 13, which are arranged horizontally and symmetrically. The upper oil port 12 is connected to the double one-way valve chamber 11 near the outer side, and the lower oil port 13 is connected to the double one-way valve chamber 11 near the inner side.

[0019] To elaborate further, such as Figures 1 to 2 As shown, a first sealing ring 22 is fitted inside the connector body 2. The first sealing ring 22 is installed between the connector body 2 and the inner wall of the outer end of the double one-way valve chamber 11. The first sealing ring 22 ensures the sealing between the connector body 2 and the double one-way valve chamber 11. A first sealing groove 51 is opened on the outer periphery of the sealing step 5. A retaining ring 52 and a second sealing ring 53 are fixedly installed in the sealing groove. The second sealing ring 53 is installed at the sealing step 5, ensuring the sealing between the valve core 3 and the plunger 4. A second sealing groove 41 is opened on the outer periphery of the plunger 4. A third sealing ring 42 is fixedly installed in the second sealing groove 41. The third sealing ring 42 ensures the sealing between the plunger 4 and the double one-way valve chamber 11. A third sealing groove 72 is opened in the plug body 7. A fourth sealing ring 73 is installed in the third sealing groove 72. The fourth sealing ring 73 ensures the sealing between the plug body 7 and the connector body 2.

[0020] The specific embodiments described herein are merely illustrative examples illustrating the spirit of this utility model. Those skilled in the art to which this utility model pertains may make various modifications or additions to the described specific embodiments or use similar methods to substitute them, without departing from the spirit of this utility model or exceeding the scope defined by the appended claims.

[0021] Although this document uses a variety of terms, the possibility of using other terms is not excluded. These terms are used merely for the convenience of describing and explaining the essence of this invention; interpreting them as any additional limitation would contradict the spirit of this invention.

Claims

1. A high-pressure internal throttling bidirectional hydraulic lock, comprising a valve body (1), a connector body (2), a valve core (3), and a plunger (4), characterized in that: The valve body (1) has a double one-way valve chamber (11) that runs through both sides. The double one-way valve chamber (11) is arranged in a symmetrical structure. The plunger (4) is installed at the center of the double one-way valve chamber (11). The valve core (3) has a cylindrical stepped diameter-changing structure. There are two valve cores (3), which are symmetrically installed inside the double one-way valve chambers (11) on both sides of the plunger (4). A sealing step (5) is installed on the inner side of the valve core (3). The sealing step (5) is installed between the plunger (4) and the valve core (3) and is sealed to both the plunger (4) and the valve core (3). Next, a spring cavity (31) is provided in the valve core (3), and a spring assembly (6) is installed in the spring cavity (31). The connector body (2) is installed in the double one-way valve cavity (11) outside the valve core (3). One end of the connector body (2) is sleeved on the outside of the valve core (3) and the other end extends out of the double one-way valve cavity (11). An installation hole (21) is provided in the connector body (2), and a plug body (7) is connected in the installation hole (21). A spring groove (71) is provided on the inner end face of the plug body (7), and the spring assembly (6) is connected to the end face of the spring groove (71).

2. The high-pressure internal throttling bidirectional hydraulic lock according to claim 1, characterized in that: The valve body (1) is provided with an upper oil port (12) and a lower oil port (13). There are two upper oil ports (12) and two lower oil ports (13) arranged horizontally and symmetrically. The upper oil port (12) is connected to the double one-way valve chamber (11) near the outer side, and the lower oil port (13) is connected to the double one-way valve chamber (11) near the inner side.

3. The high-pressure internal throttling bidirectional hydraulic lock according to claim 1, characterized in that: The connector body (2) is fitted with a first sealing ring (22), which is installed between the connector body (2) and the inner wall of the outer end of the double one-way valve chamber (11).

4. A high-pressure internal throttling bidirectional hydraulic lock according to claim 1, characterized in that: The sealing step (5) has a first sealing groove (51) on its outer periphery, and a retaining ring (52) and a second sealing ring (53) are fixedly installed in the sealing groove.

5. A high-pressure internal throttling bidirectional hydraulic lock according to claim 1, characterized in that: The plunger (4) has a second sealing groove (41) on its outer periphery, and a third sealing ring (42) is fixedly installed in the second sealing groove (41).

6. A high-pressure internal throttling bidirectional hydraulic lock according to claim 1, characterized in that: The plug body (7) has a third sealing groove (72) and a fourth sealing ring (73) is installed in the third sealing groove (72).

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