CN216618071U - Valve core limiting connector and hydraulic valve - Google Patents
Valve core limiting connector and hydraulic valve Download PDFInfo
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- CN216618071U CN216618071U CN202122891676.2U CN202122891676U CN216618071U CN 216618071 U CN216618071 U CN 216618071U CN 202122891676 U CN202122891676 U CN 202122891676U CN 216618071 U CN216618071 U CN 216618071U
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Abstract
The utility model relates to a hydraulic valve, aiming at solving the problem that the maximum stroke of a valve core cannot be adjusted by the existing valve core limiting joint, the utility model constructs a valve core limiting joint and a hydraulic valve, wherein the valve core limiting joint comprises a columnar body, a channel axially penetrating through the body is arranged in the body, an internal thread is arranged at the first end of the channel, which is close to the body, the outer column surface of the body is in a step shape, the first end of the channel is a large-diameter section body, an installation thread is arranged at the outer side surface of a small-diameter section body, the utility model is characterized in that a limiting adjustment thread and an adjustment nut matched with the limiting adjustment thread are arranged on the outer column surface of the small-diameter section body, and the limiting adjustment thread is positioned between the installation thread and the large-diameter section. The valve core limiting connector can realize the adjustment of the limiting stroke of the valve core through the adjusting nut, so that the valve core limiting connector of the same specification can be adapted to various different hydraulic valves, is suitable for the adjustment of the limiting stroke of different valve cores, and improves the universality.
Description
Technical Field
The utility model relates to a hydraulic valve, in particular to a valve core limiting connector and a hydraulic valve.
Background
There are many kinds of valves in a hydraulic system of a construction machine such as an excavator for controlling an oil passage in the hydraulic system. The movement of each actuating element is controlled by controlling the movement of each valve core, and the main control valve is connected with the hose through a joint. The speed at which each of the actuators of the apparatus occurs varies due to manufacturing tolerances of the main control valves, and the specific requirements of the user result in different requirements in the same machine. If a special model is not produced in large quantities, a new control valve cannot be developed again due to cost reasons. In order to meet the requirements for the speeds of different configuration executing elements, the displacement of the valve core of the main control valve is limited, the opening of the valve core is adjusted so as to control the flow rate to obtain different speeds, and a joint can be mounted to limit the position of the valve core to obtain the displacements of the valve core at different positions. Meanwhile, the manufacturing of the main control valve has errors, and each main control valve body has different differences more or less, so that the hydraulic system has different errors. As shown in fig. 1 and 2, the conventional spool limiting joint comprises a body and a sealing O-ring 4, wherein an axially through channel 5 is formed in the body, and an internal thread 6 is formed on the inner wall of the channel 5, which is adjacent to the first end, and is used for connecting a pipeline and introducing pilot pressure oil. The outer cylindrical surface of body is the echelonment, and wherein the small diameter section body is used for stretching into in the valve body, is connected with the valve body, and this tip of small diameter section is used for contacting with the case to carry on spacingly to case removal stroke. Be provided with mounting thread 3 in the outside of minor diameter section body 2, mounting thread 3 is used for realizing being connected of spacing joint and valve body with the interior screw-thread fit of the valve intracavity of valve body. And a sealing ring 4 is arranged at the joint of the small-diameter section body 2 and the large-diameter section body 1 and used for installing and sealing the valve core limiting joint. When the spacing joint of case was installed, the body was connected with the valve body through installation screw thread 3 to the step and the valve body contact of little diameter section body and the big diameter section body junction limit the length that the spacing joint of case inserted in the valve body. Because small diameter section body length is fixed spacing length, can not satisfy the existence of each hydraulic system's error to this case spacing joint of same specification. In order to meet the stroke limit requirements of the valve cores of the hydraulic valves in various hydraulic systems, the valve core limit joints on the hydraulic valves in the various hydraulic systems are set according to the limit requirements of the valve cores, so that the limit joints are various in types, and the management cost is increased.
SUMMERY OF THE UTILITY MODEL
The utility model aims to solve the technical problem that the maximum stroke of a valve core cannot be adjusted by the conventional valve core limiting connector, and provides a valve core limiting connector and a hydraulic valve.
The technical scheme for realizing the purpose of the utility model is as follows: the utility model provides a spacing joint of case, is including being cylindrical body, this internal passageway that has a perfect understanding the body of axial that is provided with, the passageway is close to the first end of body and is provided with the internal thread, and the echelonment is personally submitted to the body outer cylinder, and it closes on first end for big diameter section body, and this outer cylinder of little diameter section is provided with the installation screw thread, is provided with spacing regulation screw thread on its characterized in that little diameter section body outer cylinder and installs and spacing regulation screw-thread fit's adjusting nut, spacing regulation screw thread is located between installation screw thread and the big diameter section.
In the valve element limiting joint, the small-diameter section body is a polished rod between the mounting threads and the limiting adjusting threads, a gasket and a sealing ring are sleeved on the outer side of the polished rod, the gasket is located between the adjusting nut and the mounting threads, the sealing ring is located between the gasket and the mounting threads, and the polished rod between the mounting threads and the limiting adjusting threads is matched with the sealing ring to form a sealing structure between the valve element limiting joint and the valve body and prevent oil leakage.
In the valve core limit connector, the mounting thread and the limit adjusting thread are opposite in spiral direction, the length of the polished rod between the mounting thread and the limit adjusting thread is larger than the axial length of the adjusting nut, the diameter of the polished rod is smaller than the small diameter of the limit adjusting thread, and the adjusting nut is matched with the mounting thread and the limit adjusting thread. When the adjusting nut is installed on the body, the adjusting nut firstly passes through the installation thread and the polished rod and then is matched with the limiting adjusting thread.
In the valve core limit joint, the small diameter of the limit adjusting thread can be larger than the large diameter of the mounting thread. And further, the mounting thread and the limit adjusting thread are opposite in spiral direction.
In the utility model, the spiral directions of the limiting adjusting thread and the mounting thread are opposite, when the valve core limiting joint is mounted on the valve body, the position of the limiting nut is firstly adjusted on the valve core limiting joint, when the valve core limiting joint is mounted, the mounting thread is matched with the internal thread on the valve body and is screwed into the valve body, at the moment, the adjusting nut and the body rotate together, and the adjusting nut and the body are relatively static; when the adjusting nut contacts the valve body, the adjusting nut is still relative to the valve body due to the friction force of the valve body on the adjusting nut, and the adjusting nut also prevents the body from being continuously screwed into the valve body, so that the functions of positioning and locking are achieved.
The technical scheme for realizing the purpose of the utility model is as follows: the hydraulic valve is characterized by further comprising the valve core limiting connector, a connector mounting threaded hole used for mounting the valve core limiting connector is formed in the end portion of the valve cavity of the valve body, the body is mounted on the valve body in a threaded fit mode through a mounting thread on the body and the connector mounting threaded hole, and the end portion, far away from the large-diameter section body, of the small-diameter section body extends into the valve cavity at the end portion of the valve core. Further, the end part of the outer end of the joint mounting threaded hole is provided with a chamfer used for being matched with the sealing ring.
According to the utility model, the length of the valve core limiting connector inserted into the valve body of the hydraulic valve is the length between the adjusting nut and the end part of the small-diameter section body, and the length of the valve core limiting connector inserted into the valve body can be adjusted by moving the position of the adjusting nut on the small-diameter section body, so that the adjustment of the movement stroke of the valve core is realized.
Compared with the prior art, the valve core limiting connector can realize the adjustment of the limiting stroke of the valve core through the adjusting nut, so that the valve core limiting connector with the same specification can be adapted to various different hydraulic valves, is suitable for the adjustment of the limiting strokes of different valve cores, and improves the universality.
Drawings
Fig. 1 is a schematic structural diagram of a conventional spool limit joint.
Fig. 2 is a cross-sectional view of a conventional spool limit fitting.
Fig. 3 is a schematic diagram of a hydraulic valve according to the present invention.
Fig. 4 is a schematic structural diagram of a valve core limit joint in the utility model.
Fig. 5 is a cross-sectional view of the spool limit fitting of the present invention.
FIG. 6 is an enlarged view of a portion of the connection between the valve core limit fitting and the valve body of the present invention.
Part names and serial numbers in the figure:
the valve core limiting connector 10, the valve body 20, the valve core 30, the large-diameter section body 1, the small-diameter section body 2, the mounting thread 3, the sealing ring 4, the channel 5, the internal thread 6, the adjusting nut 7, the gasket 8 and the limiting adjusting thread 9.
Detailed Description
The following description of the embodiments refers to the accompanying drawings.
As shown in fig. 3 and fig. 6, the hydraulic valve in this embodiment includes a valve body 20, a valve core 30, and a valve core limit connector 10, wherein a valve cavity 21 for accommodating the valve core 30 is disposed in the valve body 20, a connector mounting threaded hole for mounting the valve core limit connector is disposed at an end of the valve cavity of the valve body 20, and the valve core limit connector 10 is mounted on the valve body 20 by thread-fitting of its mounting thread 3 and the connector mounting threaded hole on the valve body 20, and is located at an end of the valve core 30, and is used for introducing pilot pressure oil to act on the end of the valve core to control the movement of the valve core. The end part of the small-diameter section body 2 of the valve core limiting joint 10, which is far away from the large-diameter section body 1, extends into the valve cavity 21 at the end part of the valve core 30, and is used for contacting and limiting the end part of the valve core 30, so that the maximum stroke of the valve core 30 in the valve cavity 21 is limited.
As shown in fig. 4 and 5, the valve element limiting connector comprises a columnar body, a channel 5 axially penetrating through the body is arranged in the body, an internal thread 6 is arranged at the first end, close to the body, of the channel 5, the internal thread 6 is used for being connected with a pilot pipeline, and the channel 5 is used for introducing pilot pressure oil to act on the end portion of the valve element to push the valve element to move. The outer cylinder of body is the echelonment, and it is close to first end for major diameter section body 1, and 2 outer cylinders of minor diameter section bodies are provided with installation screw thread 3. Be provided with spacing regulation screw thread 9 on the 3 outer cylinder surfaces of little diameter section body and install with spacing regulation screw thread complex adjusting nut 7, spacing regulation screw thread 9 is located between installation screw thread 3 and the big diameter section body 1. The outer sleeve of the small-diameter section body 2 is provided with a gasket 8 and a sealing ring 4. The small-diameter section body 2 is a polished rod between the mounting thread 3 and the limiting adjusting thread 9, and the gasket 8 and the sealing ring 4 are located at the polished rod. The washer 8 is located between the adjusting nut 7 and the mounting thread 3, and the seal ring 4 is located between the washer 8 and the mounting thread 3. The outer end of the joint mounting threaded hole is provided with a chamfer used for being matched with the sealing ring, when the valve core is in limit joint, the sealing ring 4 is positioned between the gasket 8 and the valve body and positioned in the chamfer at the end part of the joint mounting threaded hole, and the sealing ring, a polished rod between the mounting thread 3 and the limit adjusting thread 9 and the chamfer at the outer end of the joint mounting threaded hole form a sealing structure to prevent oil leakage.
In this embodiment, the spool limit joint 10 is connected with the valve body 20 through the mounting thread 3 on the small-diameter section body 2, and the adjusting nut 7 abuts against the valve body 20 through the gasket 8, so as to limit the length of the spool limit joint 10 inserted into the valve body 20. The length of the valve core limiting joint 10 inserted into the hydraulic valve body 20 is the length D between the gasket 8 and the end part of the small-diameter section body 2, and the position of the adjusting nut 7 on the small-diameter section body 2 is moved, so that the length of the valve core limiting joint 10 inserted into the valve body can be adjusted, and the adjustment of the maximum moving stroke of the valve core is realized.
In this embodiment, the valve core limiting joint 10 can realize the adjustment of the maximum limiting stroke of the valve core through the adjusting nut 7, so that the valve core limiting joint 10 of the same specification can be adapted to various different hydraulic valves, is adapted to the adjustment of the maximum stroke limits of different valve cores, and improves the universality.
In this embodiment, the screw directions of the mounting thread and the limiting adjustment thread may be opposite directions, in order to mount the adjustment nut, the length of the polished rod between the mounting thread and the limiting adjustment thread is greater than the axial length of the adjustment nut, the diameter of the polished rod is smaller than the small diameter of the limiting adjustment thread, and the adjustment nut is simultaneously matched with the mounting thread and the limiting adjustment thread. When the adjusting nut is installed on the body, the adjusting nut firstly passes through the installation thread and the polished rod and then is matched with the limiting adjusting thread. The spiral direction of the limiting adjusting thread is opposite to that of the mounting thread, when the valve core limiting joint is mounted on the valve body, the position of the limiting nut is firstly adjusted on the valve core limiting joint, when the valve core limiting joint is mounted, the mounting thread is matched with the internal thread on the valve body and is screwed into the valve body, at the moment, the adjusting nut and the body rotate together, and the adjusting nut and the body are relatively static; when the adjusting nut contacts the valve body, the adjusting nut is still relative to the valve body due to the friction force of the valve body on the adjusting nut, and the adjusting nut also prevents the body from being continuously screwed into the valve body, so that the functions of positioning and locking are achieved.
In this embodiment, the small diameter of the limit adjusting thread may be larger than the large diameter of the mounting thread, and further, the mounting thread and the limit adjusting thread have opposite spiral directions. Adjusting nut and spacing regulation screw thread adaptation, when installing adjusting nut, adjusting nut directly embolias from the tip of small diameter section body, through installation screw thread (need not to rotate) to spacing regulation screw thread and rather than the cooperation.
Claims (7)
1. The utility model provides a spacing joint of case, is including being cylindrical body, this internal passageway that has a perfect understanding the body of axial that is provided with, the passageway is close to the first end of body and is provided with the internal thread, and the echelonment is personally submitted to the outer cylinder of body, and it closes on first end for big diameter section body, and this outer cylinder of little diameter section is provided with the installation screw thread, is provided with spacing regulation screw thread on its characterized in that little diameter section body outer cylinder and installs and spacing regulation screw-thread fit's adjusting nut, spacing regulation screw thread is located between installation screw thread and the big diameter section body.
2. The valve core limit joint according to claim 1, wherein the small diameter section body is a polish rod between the mounting thread and the limit adjusting thread, a gasket and a sealing ring are sleeved on the outer side of the polish rod, the gasket is positioned between the adjusting nut and the mounting thread, and the sealing ring is positioned between the gasket and the mounting thread.
3. The valve core limit fitting according to claim 2, wherein the mounting thread and the limit adjusting thread have opposite screw directions, the length of the polished rod between the mounting thread and the limit adjusting thread is larger than the axial length of the adjusting nut, the diameter of the polished rod is smaller than the minor diameter of the limit adjusting thread, and the adjusting nut is simultaneously matched with the mounting thread and the limit adjusting thread.
4. The valve core limit fitting of claim 1 or 2, wherein the small diameter of the limit adjustment thread is larger than the large diameter of the mounting thread.
5. The valve core limit fitting of claim 4, wherein the mounting thread is threaded in the opposite direction to the limit adjustment thread.
6. A hydraulic valve comprises a valve body and a valve core, wherein a valve cavity for accommodating the valve core is arranged in the valve body, the hydraulic valve is characterized by further comprising a valve core limiting joint of any one of claims 1 to 5, a joint mounting threaded hole for mounting the valve core limiting joint is formed in the end portion of the valve cavity of the valve body, the body is mounted on the valve body in a threaded fit mode with the joint mounting threaded hole through mounting threads on the body, and the end portion, far away from the large-diameter section body, of the small-diameter section body extends into the valve cavity at the end portion of the valve core.
7. The hydraulic valve of claim 6, wherein the outer end of the tap mounting threaded hole is provided with a chamfer for engagement with a seal ring.
Priority Applications (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122891676.2U CN216618071U (en) | 2021-11-24 | 2021-11-24 | Valve core limiting connector and hydraulic valve |
Applications Claiming Priority (1)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| CN202122891676.2U CN216618071U (en) | 2021-11-24 | 2021-11-24 | Valve core limiting connector and hydraulic valve |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216618071U true CN216618071U (en) | 2022-05-27 |
Family
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Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202122891676.2U Active CN216618071U (en) | 2021-11-24 | 2021-11-24 | Valve core limiting connector and hydraulic valve |
Country Status (1)
| Country | Link |
|---|---|
| CN (1) | CN216618071U (en) |
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2021
- 2021-11-24 CN CN202122891676.2U patent/CN216618071U/en active Active
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