Soft sealing structure of hydraulic lock

Abstract

The utility model discloses a soft sealing structure of a hydraulic lock, and belongs to the field of hydraulic locks. According to the technical scheme, the soft sealing structure of the hydraulic lock comprises a valve sleeve, a medium channel communicated with an external hydraulic oil way is arranged in the valve sleeve, and a valve element assembly is connected in the valve sleeve in a sliding mode. The valve element assembly slides to be provided with a first position used for sealing the medium channel and a second position used for opening the medium channel, a soft sealing part is arranged outside the valve element assembly, and when the valve element assembly slides to the first position from the second position, the soft sealing part can seal the medium channel. The soft sealing part abuts against the inner wall of the medium channel so as to seal the medium channel. By means of the soft sealing part, the sealing performance of the joint between the valve element assembly and the medium channel when the valve element assembly is located at the first position can be improved, abrasion of the valve body assembly is eliminated, the service life of the hydraulic lock is prolonged, the opening and closing response time of the hydraulic lock can be shortened, and the reaction speed of the hydraulic lock is increased.

Description

Technical Field

[0001] The utility model belongs to the technical field of hydraulic locks, and in particular relates to a soft sealing structure of a hydraulic lock. Background Art

[0002] Hydraulic lock is a mechanical lock that closes and opens the lock through the flow and pressure of liquid in the absence of power and mechanical locking device. Its working principle is mainly to use the pressure of liquid and hydraulic system to control the locking state of mechanical parts to achieve the fixation and protection of mechanical equipment.

[0003] The existing hydraulic lock sealing structure is that the main valve core of the hydraulic lock is in direct contact with the valve sleeve, which has poor sealing effect and huge leakage.

[0004] The invention discloses a soft sealing structure with a buffer hydraulic lock, which optimizes the sealing structure of the hydraulic lock and reduces leakage by adding a rectangular sealing gasket between a main valve core and a valve sleeve of the hydraulic lock. Utility Model Content

[0005] The utility model provides a soft sealing structure of a hydraulic lock to solve at least one of the above technical problems.

[0006] The technical solution adopted by the utility model is:

[0007] A soft sealing structure of a hydraulic lock comprises a valve sleeve, wherein a medium channel connected to an external hydraulic oil circuit is provided in the valve sleeve, a valve core assembly is slidably connected in the valve sleeve, the valve core assembly slides to have a first position for closing the medium channel and a second position for opening the medium channel, a soft sealing portion is provided on the outside of the valve core assembly, and when the valve core assembly slides from the second position to the first position, the soft sealing portion abuts against an inner wall of the medium channel to close the medium channel.

[0008] Preferably, the valve core assembly includes a main valve core, a slide is provided in the valve sleeve, the main valve core is slidably connected to the slide, and a conical sealing portion for sealing the medium channel is provided at the lower end of the main valve core. When pressure medium is introduced into the medium channel, the pressure medium pushes the main valve core to slide from a first position to a second position. When the introduction of pressure medium into the medium channel stops, the main valve core resets from the second position to the first position.

[0009] Preferably, the soft sealing portion comprises a flexible sealing ring, and the flexible sealing ring is sleeved on the outside of the conical sealing portion.

[0010] Preferably, an outer wall of the conical sealing portion is provided with a mounting groove for mounting the flexible sealing ring, and the flexible sealing ring has a protrusion extending out of the mounting groove.

[0011] Preferably, an elastic return member is provided between the slideway and the main valve core, and when the introduction of the pressure medium into the medium channel stops, the elastic return member drives the main valve core to return from the second position to the first position.

[0012] Preferably, the elastic reset member includes a plug, the plug is threadedly connected to the slideway, and an elastic member is fixedly connected between the plug and the main valve core.

[0013] Preferably, a plurality of limiting guide grooves are formed on the inner wall of the slideway, and a limiting flange slidably matched with the guide grooves is formed on the side wall of the main valve core.

[0014] Preferably, a hexagonal mounting hole is provided at the upper end of the plug, and a first sealing ring is provided between the plug and the slideway.

[0015] Preferably, a first limiting groove is provided on the outer wall of the upper portion of the valve sleeve, and a second sealing ring is provided in the first limiting groove.

[0016] Preferably, a second limiting groove is provided on the outer wall of the lower portion of the valve sleeve, and a third sealing ring is provided in the second limiting groove.

[0017] Due to the adoption of the above technical solution, the beneficial effects achieved by the utility model are as follows:

[0018] 1. In the present application, the sealing performance of the joint between the valve core assembly and the medium channel when the valve core assembly is in the first position can be increased by setting the soft sealing part. At the same time, the closing of the medium channel can be achieved by abutting the soft sealing part against the inner wall of the medium channel, which can eliminate the wear of the end of the valve core assembly and the abutting area of ​​the medium channel abutting against the valve core assembly, thereby increasing the service life of the hydraulic lock. Generally speaking, the end of the valve core assembly is designed to be a conical cone or a trapezoidal cone. In the process of the valve core assembly sliding from the second position to the first position, the small head end of the conical cone or the trapezoidal cone plays a guiding role and enters the medium channel first, and then the large head end of the conical cone or the trapezoidal cone abuts against the medium channel to seal the medium channel. Due to the setting of the soft sealing part, the cross-section of the end of the valve core assembly is increased. When the small head end of the conical cone or the trapezoidal cone enters the medium channel, the soft sealing structure abuts against the inner wall of the medium channel and seals, thereby shortening the opening and closing response time of the hydraulic lock and improving the reaction speed of the hydraulic lock.

[0019] 2. As a preferred embodiment of the present invention, the setting of the slideway is conducive to guiding and limiting the sliding of the main valve core, and the setting of the conical sealing part can play a guiding role, increasing the accuracy of the cooperation between the main valve core and the medium channel. The end of the conical sealing part close to the medium channel is the small head end, and the soft sealing part is arranged on the side of the conical sealing part close to the small head end. The outer cross section of the soft sealing part matches the inner cross section of the medium channel, so that when the small head end of the conical sealing part enters the medium channel, the soft sealing part will be against the inner wall of the medium channel to achieve sealing of the medium channel, shorten the opening and closing response time of the hydraulic lock, and improve the reaction speed of the hydraulic lock. When the pressure medium is introduced into the medium channel, the pressure medium pushes the main valve core to slide from the first position to the second position. When the pressure medium is stopped from being introduced into the medium channel, the main valve core is reset from the second position to the first position.

[0020] 3. As a preferred embodiment of the utility model, the flexible sealing ring has good elasticity. In the process of the flexible sealing ring abutting against the inner wall of the medium channel, the flexible sealing ring can be compressed, and at the same time it can play a buffering role on the main valve core and reduce the friction between the main valve core and the medium channel.

[0021] 4. As a preferred embodiment of the present invention, the installation groove is provided to facilitate the positioning and fixing of the flexible sealing ring to prevent the flexible sealing ring from falling off.

[0022] 5. As a preferred embodiment of the utility model, the plug can be used to seal the slideway and provide a support surface for the elastic member. When the pressure medium is introduced into the medium channel, the pressure medium pushes the main valve core to slide from the first position to the second position. The kinetic energy of the elastic member is converted into elastic potential energy during compression. When the pressure medium is stopped from being introduced into the medium channel, the elastic potential energy of the elastic member is released and converted into kinetic energy to push the main valve core to reset from the second position to the first position. The first sealing ring can be provided to increase the sealing of the joint between the plug and the slideway, and prevent the hydraulic oil from leaking out of the joint between the plug and the slideway. When it is necessary to maintain and clean the main valve core, elastic member or valve sleeve, the plug can be disassembled through the hexagonal mounting hole, and then the main valve core and spring can be taken out.

[0023] 6. As a preferred embodiment of the present invention, the second sealing ring and the third sealing ring are provided to increase the sealing performance between the external pipelines connected at both ends of the valve sleeve, the first limiting groove is provided to prevent the second sealing ring from falling off, and the second limiting groove is provided to prevent the third sealing ring from falling off. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 It is a structural schematic diagram of a specific implementation method of the utility model.

[0025] The drawings described herein are used to provide a further understanding of the present invention and constitute a part of the present invention. The illustrative embodiments of the present invention and their descriptions are used to explain the present invention and do not constitute an improper limitation on the present invention.

[0026] In the attached picture:

[0027] 1. Valve sleeve; 2. Main valve core; 201. Installation groove; 202. Flexible sealing ring; 3. Elastic member; 4. Plug; 401. First sealing ring; 402. Installation hole; 5. First limiting groove; 501. Second sealing ring; 6. Second limiting groove; 601. Third sealing ring. DETAILED DESCRIPTION

[0028] In order to more clearly illustrate the overall concept of the present invention, a detailed description is given below in the form of examples in conjunction with the accompanying drawings.

[0029] In the following description, many specific details are set forth to facilitate a full understanding of the present invention. However, the present invention may also be implemented in other ways different from those described herein. Therefore, the protection scope of the present invention is not limited to the specific embodiments disclosed below.

[0030] In addition, in the description of the present invention, it should be understood that the terms "top", "bottom", "inside", "outside", "axial", "radial", "circumferential", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0031] In the present invention, unless otherwise clearly specified and limited, the terms "install", "connect", "connect", "fix" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection, an electrical connection, or a communication; it can be a direct connection, or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0032] In the present utility model, unless otherwise clearly specified and limited, the first feature "above" or "below" the second feature may be that the first and second features are in direct contact, or the first and second features are in indirect contact through an intermediate medium. In the description of this specification, the description with reference to the terms "implementation method", "example", "one embodiment", "example" or "specific example" means that the specific features, structures, materials or characteristics described in conjunction with the embodiment or example are included in at least one embodiment or example of the utility model. In this specification, the schematic representation of the above terms does not necessarily refer to the same embodiment or example. Moreover, the specific features, structures, materials or characteristics described may be combined in an appropriate manner in any one or more embodiments or examples.

[0033] Reference Figure 1 A soft sealing structure of a hydraulic lock comprises a valve sleeve 1, a medium channel connected to an external hydraulic oil circuit is arranged in the valve sleeve 1, a valve core assembly is slidably connected in the valve sleeve 1, the valve core assembly slides to have a first position for closing the medium channel and a second position for opening the medium channel, and is characterized in that a soft sealing part is arranged on the outside of the valve core assembly, and when the valve core assembly slides from the second position to the first position, the soft sealing part abuts against the inner wall of the medium channel to close the medium channel.

[0034] It can be understood by those skilled in the art that the hydraulic lock is a mechanical lock that closes and opens the lock through the flow and pressure of liquid in the absence of power and mechanical locking devices. Its working principle is mainly to use the pressure of the liquid and the hydraulic system to control the locking state of the mechanical parts to achieve the fixation and protection of the mechanical equipment. When the hydraulic pump drives the hydraulic oil into the external hydraulic oil circuit, the hydraulic oil will enter the medium channel of the valve sleeve 1, and apply a pressure to the valve core assembly, so that the valve core assembly slides from the first position to the second position under the pressure of the pressure medium, so that the medium channel is converted from the closed state to the open state, and then the hydraulic oil pumped out by the hydraulic pump can smoothly enter the external hydraulic oil circuit from the medium channel to perform work. When the hydraulic pump stops working, the pressure value applied by the pressure medium to the valve core assembly quickly decays, and the valve core assembly resets from the second position to the first position to close the medium channel to prevent the hydraulic oil in the external hydraulic oil circuit from flowing back. The provision of the soft sealing portion can increase the sealing performance of the joint between the valve core assembly and the medium channel when the valve core assembly is in the first position. At the same time, the closing of the medium channel by the abutment between the soft sealing portion and the inner wall of the medium channel can eliminate the wear of the end of the valve core assembly and the abutment area of ​​the medium channel abutting the valve core assembly, thereby increasing the service life of the hydraulic lock. Generally speaking, the end of the valve core assembly is designed to be a conical cone or a trapezoidal table. In the process of the valve core assembly sliding from the second position to the first position, the small head end of the conical cone or the trapezoidal table plays a guiding role and enters the medium channel first, and then the large head end of the conical cone or the trapezoidal table abuts against the medium channel to seal the medium channel. Due to the provision of the soft sealing portion, the cross-section of the end of the valve core assembly is increased. When the small head end of the conical cone or the trapezoidal table enters the medium channel, the soft sealing structure then abuts against the inner wall of the medium channel to seal, thereby shortening the opening and closing response time of the hydraulic lock and improving the reaction speed of the hydraulic lock.

[0035] As a specific implementation of the valve core assembly, the valve core assembly includes a main valve core 2, a slideway is provided in the valve sleeve 1, the main valve core 2 is slidably connected to the slideway, and a conical sealing portion for sealing the medium channel is provided at the lower end of the main valve core 2.

[0036] The setting of the slideway is conducive to guiding and limiting the sliding of the main valve core 2. The setting of the conical sealing part can play a guiding role, increase the accuracy of the main valve core 2 and the medium channel. The end of the conical sealing part close to the medium channel is the small head end, and the soft sealing part is arranged on the side of the conical sealing part close to the small head end. The outer cross section of the soft sealing part matches the inner cross section of the medium channel, so that when the small head end of the conical sealing part enters the medium channel, the soft sealing part will be against the inner wall of the medium channel to achieve the sealing of the medium channel, shorten the opening and closing response time of the hydraulic lock, and improve the reaction speed of the hydraulic lock. When the pressure medium is introduced into the medium channel, the pressure medium pushes the main valve core 2 to slide from the first position to the second position. When the pressure medium is stopped from being introduced into the medium channel, the main valve core 2 is reset from the second position to the first position.

[0037] As a preferred example of the above embodiment, a plurality of limiting guide grooves are provided on the inner wall of the slideway, and a limiting flange that slides with the guide grooves is provided on the side wall of the main valve core 2. The setting of the limiting flange and the limiting guide grooves can further increase the stability of the sliding process of the main valve core 2 and improve the matching accuracy between the main valve core 2 and the medium channel.

[0038] As a specific embodiment of the soft sealing portion, refer to Figure 1 The soft sealing part includes a flexible sealing ring 202, which is sleeved on the outside of the conical sealing part. The flexible sealing ring 202 has good elasticity. When the flexible sealing ring 202 abuts against the inner wall of the medium channel, the flexible sealing ring 202 can be compressed, and at the same time, it can play a buffering role for the main valve core 2 and reduce the friction between the main valve core 2 and the medium channel. The material of the flexible sealing ring 202 is not specifically limited, and it can be made of silicone, corrosion-resistant rubber and other materials.

[0039] Furthermore, the outer wall of the conical sealing portion is provided with an installation groove 201 for installing the flexible sealing ring 202, and the flexible sealing ring 202 has a protrusion extending outside the installation groove 201. The installation groove 201 is provided to facilitate the positioning and fixing of the flexible sealing ring 202 to prevent the flexible sealing ring 202 from falling off.

[0040] As a preferred embodiment of the present application, refer to Figure 1 An elastic reset member is provided between the slideway and the main valve core 2. When the introduction of the pressure medium into the medium channel stops, the elastic reset member drives the main valve core 2 to reset from the second position to the first position.

[0041] Specifically, the elastic reset member includes a plug 4, which is threadedly connected to the slideway, an elastic member 3 is fixedly connected between the plug 4 and the main valve core 2, a hexagonal mounting hole 402 is provided at the upper end of the plug 4, and a first sealing ring 401 is provided between the plug 4 and the slideway.

[0042] The plug 4 can seal the slideway and provide a support surface for the elastic member 3. When the pressure medium is introduced into the medium channel, the pressure medium pushes the main valve core 2 to slide from the first position to the second position. The elastic member 3 is compressed and the kinetic energy is converted into elastic potential energy. When the pressure medium is stopped from being introduced into the medium channel, the elastic potential energy of the elastic member 3 is released and converted into kinetic energy to push the main valve core 2 to reset from the second position to the first position. The first sealing ring 401 can be set to increase the sealing of the joint between the plug 4 and the slideway, and prevent the hydraulic oil from leaking out of the joint between the plug 4 and the slideway. When the main valve core 2, the elastic member 3 or the valve sleeve 1 needs to be maintained and cleaned, the plug 4 can be disassembled through the hexagonal mounting hole 402, and then the main valve core 2 and the spring can be taken out.

[0043] As a preferred embodiment of the valve sleeve 1, a first limiting groove 5 is provided on the upper outer wall of the valve sleeve 1, a second sealing ring 501 is provided in the first limiting groove 5, a second limiting groove 6 is provided on the lower outer wall of the valve sleeve 1, and a third sealing ring 601 is provided in the second limiting groove 6. The second sealing ring 501 and the third sealing ring 601 can increase the sealing performance between the external pipelines connected at both ends of the valve sleeve 1, the first limiting groove 5 can prevent the second sealing ring 501 from falling off, and the second limiting groove 6 can prevent the third sealing ring 601 from falling off.

[0044] The parts not described in the present invention can be realized by adopting or drawing on the existing technology.

[0045] The various embodiments in this specification are described in a progressive manner, and the same or similar parts between the various embodiments can be referenced to each other, and each embodiment focuses on the differences from other embodiments.

[0046] The above description is only an embodiment of the present invention and is not intended to limit the present invention. For those skilled in the art, the present invention may have various modifications and variations. Any modification, equivalent substitution, improvement, etc. made within the spirit and principle of the present invention shall be included in the scope of the claims of the present invention.

Claims

1. A soft sealing structure of a hydraulic lock, comprising a valve sleeve (1), wherein a medium channel connected to an external hydraulic oil circuit is provided in the valve sleeve (1), a valve core assembly is slidably connected in the valve sleeve (1), and the valve core assembly slides to have a first position for closing the medium channel and a second position for opening the medium channel, characterized in that: A soft sealing portion is disposed outside the valve core assembly. When the valve core assembly slides from the second position to the first position, the soft sealing portion abuts against the inner wall of the medium channel to close the medium channel.

2. A soft sealing structure of a hydraulic lock according to claim 1, characterized in that: The valve core assembly comprises a main valve core (2), a slideway is provided in the valve sleeve (1), the main valve core (2) is slidably connected to the slideway, and a conical sealing portion for sealing the medium channel is provided at the lower end of the main valve core (2). When pressure medium is introduced into the medium channel, the pressure medium pushes the main valve core (2) to slide from a first position to a second position. When the introduction of pressure medium into the medium channel stops, the main valve core (2) resets from the second position to the first position.

3. A soft sealing structure of a hydraulic lock according to claim 2, characterized in that: The soft sealing portion comprises a flexible sealing ring (202), and the flexible sealing ring (202) is sleeved on the outside of the conical sealing portion.

4. A soft sealing structure of a hydraulic lock according to claim 3, characterized in that: The outer wall of the conical sealing portion is provided with a mounting groove (201) for mounting the flexible sealing ring (202), and the flexible sealing ring (202) has a protruding portion extending outside the mounting groove (201).

5. The soft sealing structure of a hydraulic lock according to claim 2, characterized in that: An elastic return member is provided between the slideway and the main valve core (2); when the introduction of pressure medium into the medium channel stops, the elastic return member drives the main valve core (2) to return from the second position to the first position.

6. A soft sealing structure of a hydraulic lock according to claim 5, characterized in that: The elastic reset component comprises a plug (4), the plug (4) is threadedly connected to the slideway, and an elastic component (3) is fixedly connected between the plug (4) and the main valve core (2).

7. The soft sealing structure of a hydraulic lock according to claim 2, characterized in that: The inner wall of the slideway is provided with a plurality of limiting guide grooves, and the side wall of the main valve core (2) is provided with a limiting flange which is slidably matched with the guide grooves.

8. The soft sealing structure of a hydraulic lock according to claim 6, characterized in that: The upper end of the plug (4) is provided with a hexagonal mounting hole (402), and a first sealing ring (401) is provided between the plug (4) and the slideway.

9. A soft sealing structure for a hydraulic lock according to any one of claims 1 to 8, characterized in that: The upper outer wall of the valve sleeve (1) is provided with a first limiting groove (5), and a second sealing ring (501) is provided in the first limiting groove (5).

10. A soft sealing structure for a hydraulic lock according to any one of claims 1 to 8, characterized in that: A second limiting groove (6) is provided on the lower outer wall of the valve sleeve (1), and a third sealing ring (601) is provided in the second limiting groove (6).

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