Load holding valve

Abstract

The utility model relates to the technical field of load holding valves, in particular to a load holding valve which comprises a valve body, a first liquid opening and a second liquid opening, the first liquid opening and the second liquid opening are formed in the surface of the valve body, a valve rod assembly and a screw assembly are fixedly connected to the upper end and the lower end of the valve body respectively, an outer mounting structure is fixedly connected to the outer side of the valve body, and a limiting groove is fixedly formed in the surface of the valve body. And one side of the outer mounting structure is embedded into the limiting groove, the transverse end of the valve body is fixedly connected with a first buffering structure, and the first buffering structure is located between the valve body and the outer mounting structure at the same time. The effect that the whole valve body is surrounded and limited from the outer side position is achieved through a first limiting side plate, a second limiting side plate, a third limiting side plate, a fourth limiting side plate and a fifth limiting side plate, and the effect that the whole outer installation structure and the valve body are installed and fixed conveniently is achieved through an insertion plate. And the effect of adjusting and adapting according to the size of the valve body and the valve body is achieved through a fifth limiting side plate and a fourth limiting side plate which are movably connected in an inserted mode.

Description

Technical Field

[0001] The utility model relates to the technical field of load holding valves, in particular to a load holding valve. Background Art

[0002] In existing excavators, the boom of the excavator is mainly driven by a hydraulic system, among which the load holding system is an essential hydraulic system in the hydraulic system of the excavator, which is mainly used to ensure that the excavator can maintain a certain action for a long time, and the load holding valve is the most core component of the load holding system.

[0003] The load holding valve, also called the balancing valve, is an important component widely used in the hydraulic load-bearing systems of engineering machinery such as loaders and excavators or construction machinery such as tower cranes and cranes. It consists of a main valve and a control valve. Currently, there are two main types: single-stage and pilot. The load holding valve is used in the hydraulic system to prevent the load from causing the hydraulic cylinder or motor to lose control. When this valve is installed near the oil cylinder, it can prevent the pipeline hose from rupturing. This valve can be installed on the boom cylinder of the hydraulic excavator in the form of a flange. After adjustment, this valve can become a component of the load holding and load lowering system.

[0004] However, the existing load holding valve has the following problems when it is installed on the boom cylinder of a hydraulic excavator through a flange:

[0005] When installing through flange form, the installation needs to be completed through the matching connecting flange and adjustment. The matching installation is not convenient enough. At the same time, when the valve body is installed and used with the boom cylinder body, the buffering stability between the valve body itself and the cylinder body cannot be well achieved, which in turn affects the actual functional use of the valve body and reduces its service life. When using an external buffer structure to ensure the stability of the valve body installation and buffering, the two need to have a certain degree of adaptation.

[0006] Therefore, the utility model proposes a load holding valve. Utility Model Content

[0007] In view of the defects in the prior art, a load holding valve provided by the utility model can solve the following problems: when the existing load holding valve is installed in the form of a flange, it requires an adaptive connecting flange and adjustment to complete the installation, and the installation adaptability is low and inconvenient; at the same time, during the process of completing the installation and use of the valve body and the boom cylinder body, the buffering stability between the valve body itself and the cylinder body cannot be well achieved, which in turn affects the actual functional use of the valve body and reduces its service life. When using an external buffer structure to ensure the installation stability and buffering of the valve body, the two are required to have a certain degree of high adaptability.

[0008] In order to solve the above technical problems, the utility model proposes the following technical solutions:

[0009] A load holding valve comprises a valve body and a first liquid port and a second liquid port on the surface of the valve body, the upper and lower ends of the valve body are fixedly connected to a valve stem assembly and a screw assembly, the outer side of the valve body is fixedly connected to an external mounting structure, a limiting groove is fixedly provided on the surface of the valve body, one side of the external mounting structure is embedded in the limiting groove, a lateral end of the valve body is fixedly connected to a first buffer structure, and the first buffer structure is simultaneously located between the valve body and the external mounting structure.

[0010] Furthermore, the overall outer shell of the valve body is configured as a double-layer outer shell, and the limiting groove is vertically opened and extends between the two layers of the outer shell.

[0011] Furthermore, two groups of first buffer structures are vertically arranged along one lateral end of the valve body, and the first buffer structure includes a mounting support integrally arranged with the valve body, the outer end of the mounting support is fixedly connected to a mounting bottom cylinder, a buffer rod is embedded in the interior of the mounting bottom cylinder, and the outer end of the buffer rod is fixedly connected to a contact plate.

[0012] Furthermore, the mounting support is convexly arranged, and the mounting base tube, the buffer rod and the contact plate are horizontally connected and arranged in sequence, the buffer rod is arranged as a spring buffer rod, and the contact plate is fixedly connected to the inside of the external mounting structure at the same time.

[0013] Furthermore, the external mounting structure includes a support base and an inner limiting layer at its inner side. The support base is arranged in a "[" shape as a whole. The top surface of the support base is fixedly connected with a longitudinally arranged contact layer. The edge of one side of the top of the support base is fixedly connected with a matching first limiting side plate and a second limiting side plate, and the edge of the other side of the top of the support base is fixedly connected with a matching third limiting side plate, a fourth limiting side plate and a fifth limiting side plate.

[0014] Furthermore, the external mounting structure is arranged in a "Z" shape as a whole, and the external mounting structure also includes a second buffer structure embedded in the surface of the first limiting side plate and the third limiting side plate. The outer ends of the first limiting side plate and the third limiting side plate are fixedly connected with plug plates, and an inner partition plate is fixedly connected between the fourth limiting side plate and the fifth limiting side plate.

[0015] Furthermore, a plurality of second buffer structures are vertically arranged along the surfaces of the first limiting side plate and the third limiting side plate, and the second buffer structures include a first buffer cylinder, a spring, and a second buffer cylinder which are fixedly connected in sequence.

[0016] Furthermore, the support base is arranged horizontally as a whole, while the side plate structures on both side edges of its top are arranged vertically, the contact layer is arranged as an elastic sponge layer, which is arranged on the top side of the support base, and the inner limiting layer is arranged as a rubber layer, which is arranged longitudinally on the inner side of the support base, and the inner end of the inner limiting layer is arranged in an arc-shaped concave shape, and at the same time, the inner limiting layer fits the outer surface of the valve stem assembly at the bottom end of the valve body.

[0017] Furthermore, the first limiting side plate and the second limiting side plate are both connected in a "convex" shape, the third limiting side plate and the fourth limiting side plate are both connected in a "convex" shape, and the fourth limiting side plate and the fifth limiting side plate are both set in an "L" shape, the fifth limiting side plate and the fourth limiting side plate are movably connected in a superimposed state, and the surfaces of the fifth limiting side plate and the second limiting side plate are provided with mounting screw holes.

[0018] Furthermore, the outer end of the plug board is convex inwardly convex in a triangular shape, and the surface of the plug board is provided with vertically arranged mounting screw holes, while the outer end of the plug board is embedded in the limiting groove.

[0019] Furthermore, the first buffer cylinder is located outside the first limiting side plate and the second limiting side plate, and the second buffer cylinder is in contact with the surface of the valve body.

[0020] It can be seen from the above technical solution that the beneficial effects of the utility model are:

[0021] 1. The bottom cylinder is installed to facilitate the installation of the buffer rod on the outside of the valve body, and the buffer rod and the contact plate are used to buffer the vibration of the external horizontal position.

[0022] 2. The support base cooperates with the contact layer on the top and the inner limit layer to achieve the effect of supporting and buffering the valve body as a whole from the bottom position.

[0023] 3. The first limiting side plate, the second limiting side plate, the third limiting side plate, the fourth limiting side plate and the fifth limiting side plate are used to surround and limit the valve body as a whole from the outside. The plug-in plate is used to facilitate the installation and fixation of the entire external mounting structure and the valve body. The fifth limiting side plate and the fourth limiting side plate are movably connected to achieve the effect of adjusting and adapting the valve body according to its size.

[0024] 4. The second buffer structure can buffer the longitudinal external force on the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0025] In order to more clearly illustrate the specific implementation of the utility model or the technical solution in the prior art, the following is a brief introduction to the drawings required for the specific implementation or the prior art description. In all the drawings, similar elements or parts are generally identified by similar reference numerals. In the drawings, each element or part is not necessarily drawn according to the actual scale.

[0026] Figure 1 It is a front view of the overall structure of the utility model;

[0027] Figure 2 This is a front view of the valve body connection in the utility model;

[0028] Figure 3For the utility model Figure 2 A magnified view of the structure at center;

[0029] Figure 4 This is a schematic diagram of the connection between the internal and external installation structures of the utility model;

[0030] Figure 5 For the utility model Figure 4 Enlarged view of the structure at point B in the middle.

[0031] Reference numerals:

[0032] 1. Valve body; 2. First liquid port; 3. Second liquid port; 4. Valve stem assembly; 5. External mounting structure; 6. Screw assembly; 7. First buffer structure; 8. Limiting groove; 9. Mounting support; 10. Mounting bottom cylinder; 11. Buffer rod; 12. Contact plate; 13. Support base; 14. Inner limiting layer; 15. Contact layer; 16. First limiting side plate; 17. Second limiting side plate; 18. Third limiting side plate; 19. Fourth limiting side plate; 20. Fifth limiting side plate; 21. Inner partition; 22. Second buffer structure; 23. First buffer cylinder; 24. Spring; 25. Second buffer cylinder; 26. Insert plate. DETAILED DESCRIPTION

[0033] The following embodiments of the technical solution of the utility model are described in detail in conjunction with the accompanying drawings. The following embodiments are only used to more clearly illustrate the technical solution of the utility model, and are therefore only used as examples, and cannot be used to limit the protection scope of the utility model.

[0034] See also Figure 1-5 As shown, a load holding valve includes a valve body 1 and a first liquid port 2 and a second liquid port 3 on the surface of the valve body 1, the upper and lower ends of the valve body 1 are fixedly connected with a valve stem assembly 4 and a screw assembly 6, the outer side of the valve body 1 is fixedly connected with an external mounting structure 5, a limiting groove 8 is fixedly provided on the surface of the valve body 1, one side of the external mounting structure 5 is embedded in the limiting groove 8, a first buffer structure 7 is fixedly connected to one lateral end of the valve body 1, and the first buffer structure 7 is located between the valve body 1 and the external mounting structure 5 at the same time.

[0035] In the embodiment of the utility model, the whole shell of the valve body 1 is set as a double-layer shell, and the limit groove 8 is vertically opened and extends between the two layers of the shell;

[0036] Two groups of first buffer structures 7 are vertically arranged along one lateral end of the valve body 1. The first buffer structure 7 includes a mounting support 9 integrally arranged with the valve body 1. The outer end of the mounting support 9 is fixedly connected to a mounting bottom cylinder 10. A buffer rod 11 is embedded in the mounting bottom cylinder 10. The outer end of the buffer rod 11 is fixedly connected to a contact plate 12.

[0037] The mounting support 9 is convexly arranged, and the mounting base 10, the buffer rod 11 and the contact plate 12 are horizontally connected and arranged in sequence, the buffer rod 11 is a spring buffer rod, and the contact plate 12 is fixedly connected to the inside of the external mounting structure 5;

[0038] The bottom cylinder 10 is installed to facilitate the installation of the buffer rod 11 on the outside of the valve body 1 to limit the position, and the buffer rod 11 and the contact plate 12 are used to buffer the vibration of the external horizontal position.

[0039] During the installation and use of the device and the external boom cylinder, the horizontal vibration generated is transmitted to the first buffer structure 7 through the external installation structure 5, and the vibration in the direction of the position is buffered by the buffer rod 11, thereby reducing the vibration of the valve body 1 itself, thereby ensuring the stability of use and the service life of the valve body 1.

[0040] The external mounting structure 5 includes a support base 13 and an inner limiting layer 14 at the inner side thereof. The support base 13 is arranged in a "[" shape as a whole. A longitudinally arranged contact layer 15 is fixedly connected to the top surface of the support base 13. A first limiting side plate 16 and a second limiting side plate 17 are fixedly connected to the top edge of one side of the support base 13. A third limiting side plate 18, a fourth limiting side plate 19 and a fifth limiting side plate 20 are fixedly connected to the top edge of the other side of the support base 13.

[0041] The outer mounting structure 5 is arranged in a "Z" shape as a whole, and the outer mounting structure 5 also includes a second buffer structure 22 embedded in the surface of the first limiting side plate 16 and the third limiting side plate 18, the outer ends of the first limiting side plate 16 and the third limiting side plate 18 are fixedly connected with a plug plate 26, and the fourth limiting side plate 19 and the fifth limiting side plate 20 are fixedly connected with an inner partition plate 21;

[0042] A plurality of second buffer structures 22 are vertically arranged along the surfaces of the first limiting side plate 16 and the third limiting side plate 18. The second buffer structures 22 include a first buffer cylinder 23, a spring 24, and a second buffer cylinder 25 which are fixedly connected in sequence.

[0043] The support base 13 is arranged horizontally as a whole, and the side plate structures on both sides of the top edge thereof are arranged vertically, the contact layer 15 is arranged as an elastic sponge layer, and is arranged on one side of the top of the support base 13, the inner limiting layer 14 is arranged as a rubber layer, and is arranged longitudinally on the inner side of the support base 13, and the inner end of the inner limiting layer 14 is arranged in an arc-shaped inward concave shape, and at the same time, the inner limiting layer 14 is in contact with the outer surface of the valve stem assembly 4 at the bottom end of the valve body 1;

[0044] The supporting base 13 cooperates with the contact layer 15 and the inner limiting layer 14 on the top thereof to achieve the effect of supporting and buffering the valve body 1 as a whole from the bottom position.

[0045] The first limiting side plate 16 and the second limiting side plate 17 are both connected in a "convex" shape, the third limiting side plate 18 and the fourth limiting side plate 19 are both connected in a "convex" shape, and the fourth limiting side plate 19 and the fifth limiting side plate 20 are both set in an "L" shape, the fifth limiting side plate 20 and the fourth limiting side plate 19 are movably connected in a superimposed state, and the surfaces of the fifth limiting side plate 20 and the second limiting side plate 17 are both provided with mounting screw holes;

[0046] The outer end of the plug plate 26 is triangularly convex, and the surface of the plug plate 26 is provided with vertically arranged mounting screw holes, and the outer end of the plug plate 26 is embedded in the limiting groove 8;

[0047] The first limiting side plate 16, the second limiting side plate 17, the third limiting side plate 18, the fourth limiting side plate 19 and the fifth limiting side plate 20 are used to surround and limit the valve body 1 as a whole from the outside. The plug plate 26 is used to facilitate the installation and fixation of the entire external mounting structure 5 and the valve body 1. The fifth limiting side plate 20 and the fourth limiting side plate 19 that are movably plugged in are used to adjust and adapt the valve body 1 according to its size.

[0048] When installing the device and the external boom cylinder body, the user first embeds the outer end of the plug plate 26 into the limiting groove 8, so that the side plate structure fits the outer side of the valve body 1 to complete the surrounding limiting of the valve body 1. At this time, the valve body 1 is located on the inner side of the first limiting side plate 16 and the third limiting side plate 18, and the inner partition plate 21 is located on the outer side of the valve body 1, the support base 13 is located at the bottom end of the valve body 1, the contact layer 15 fits the bottom surface of the valve body 1, and the inner end of the inner limiting layer 14 fits the valve stem assembly 4 at the bottom end of the valve body 1, forming a buffer for the entire valve body 1. When installing the device and the external boom cylinder body, the user adjusts the distance between the fifth limiting side plate 20 and the fourth limiting side plate 19, so that the fifth limiting side plate 20 fits the surface of the external boom cylinder body, and then the user installs and fixes the plug plate 26 and the side plate structure between the valve body 1 by external screws.

[0049] The first buffer cylinder 23 is located outside the first limiting side plate 16 and the second limiting side plate 17, and the second buffer cylinder 25 is attached to the surface of the valve body 1;

[0050] The second buffer structure 22 can buffer the longitudinal external force applied to the valve body 1 .

[0051] After the valve body 1 is installed with the external boom cylinder, the longitudinal external force it receives is buffered by the spring 24 in the second buffer structure 22 , while the lateral external force it receives is buffered by the buffer rod 11 in the first buffer structure 7 in contact with the inner partition plate 21 .

[0052] Finally, it should be noted that the above embodiments are only used to illustrate the technical solution of the utility model, rather than to limit it. Although the utility model has been described in detail with reference to the aforementioned embodiments, those skilled in the art should understand that they can still modify the technical solutions described in the aforementioned embodiments, or replace some or all of the technical features therein by equivalents. These modifications or replacements do not make the essence of the corresponding technical solutions deviate from the scope of the technical solutions of the embodiments of the utility model, and they should all be included in the scope of the claims and specification of the utility model.

Claims

1. A load holding valve, characterized in that: The invention comprises a valve body (1) and a first liquid port (2) and a second liquid port (3) on the surface of the valve body; the upper and lower ends of the valve body (1) are fixedly connected to a valve stem assembly (4) and a screw assembly (6); the outer side of the valve body (1) is fixedly connected to an external mounting structure (5); a limiting groove (8) is fixedly provided on the surface of the valve body (1); one side of the external mounting structure (5) is embedded in the limiting groove (8); a first buffer structure (7) is fixedly connected to one lateral end of the valve body (1); and the first buffer structure (7) is located between the valve body (1) and the external mounting structure (5).

2. A load holding valve according to claim 1, characterized in that: The overall outer shell of the valve body (1) is configured as a double-layer outer shell, and the limiting groove (8) is vertically opened and extends between the two layers of the outer shell.

3. A load holding valve according to claim 1, characterized in that: The first buffer structure (7) is vertically arranged in two groups along one lateral end of the valve body (1), and the first buffer structure (7) includes a mounting support (9) integrally arranged with the valve body (1), the outer end of the mounting support (9) is fixedly connected to a mounting base tube (10), a buffer rod (11) is embedded in the interior of the mounting base tube (10), and the outer end of the buffer rod (11) is fixedly connected to a contact plate (12).

4. A load holding valve according to claim 3, characterized in that: The mounting support (9) is arranged in a raised manner, and the mounting base cylinder (10), the buffer rod (11) and the contact plate (12) are arranged horizontally and sequentially, the buffer rod (11) is arranged as a spring buffer rod, and the contact plate (12) is fixedly connected to the inside of the external mounting structure (5).

5. A load holding valve according to claim 1, characterized in that: The external mounting structure (5) comprises a support base (13) and an inner limiting layer (14) at an inner side thereof; the support base (13) is arranged in a "[" shape as a whole; a longitudinally arranged contact layer (15) is fixedly connected to the top surface of the support base (13); a first limiting side plate (16) and a second limiting side plate (17) are fixedly connected to the top edge of one side of the support base (13); and a third limiting side plate (18), a fourth limiting side plate (19) and a fifth limiting side plate (20) are fixedly connected to the top edge of the other side of the support base (13).

6. A load holding valve according to claim 5, characterized in that: The outer mounting structure (5) is arranged in a "Z" shape as a whole, and the outer mounting structure (5) also includes a second buffer structure (22) embedded in the surface of the first limiting side plate (16) and the third limiting side plate (18), the outer ends of the first limiting side plate (16) and the third limiting side plate (18) are fixedly connected with a plug plate (26), and the fourth limiting side plate (19) and the fifth limiting side plate (20) are fixedly connected with an inner partition plate (21).

7. A load holding valve according to claim 6, characterized in that: The second buffer structure (22) is vertically arranged in multiple groups along the surface of the first limiting side plate (16) and the third limiting side plate (18), and the second buffer structure (22) includes a first buffer cylinder (23), a spring (24) and a second buffer cylinder (25) which are fixedly connected in sequence; the first buffer cylinder (23) is located on the outside of the first limiting side plate (16) and the second limiting side plate (17), and the second buffer cylinder (25) is in contact with the surface of the valve body (1).

8. A load holding valve according to claim 5, characterized in that: The support base (13) is arranged horizontally as a whole, while the side plate structures at the two side edges of its top are arranged vertically, the contact layer (15) is arranged as an elastic sponge layer, and is arranged on one side of the top of the support base (13), the inner limiting layer (14) is arranged as a rubber layer, and is arranged longitudinally on the inner side of the support base (13), and the inner end of the inner limiting layer (14) is arranged in an arc-shaped concave shape, and at the same time, the inner limiting layer (14) fits the outer surface of the valve stem assembly (4) at the bottom end of the valve body (1).

9. A load holding valve according to claim 6, characterized in that: The first limiting side plate (16) and the second limiting side plate (17) are both arranged in a "convex" shape and are butt-jointed with each other. The third limiting side plate (18) and the fourth limiting side plate (19) are both arranged in a "convex" shape and are butt-jointed with each other. The fourth limiting side plate (19) and the fifth limiting side plate (20) are both arranged in an "L" shape. The fifth limiting side plate (20) and the fourth limiting side plate (19) are movably plugged in a superimposed state. The surfaces of the fifth limiting side plate (20) and the second limiting side plate (17) are both provided with mounting screw holes.

10. A load holding valve according to claim 6, characterized in that: The outer end of the plug plate (26) is triangularly convex, and the surface of the plug plate (26) is provided with vertically arranged mounting screw holes, while the outer end of the plug plate (26) is embedded in the limiting groove (8).

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