Hydraulic safety valve of dumper

Abstract

The dumper hydraulic safety valve comprises a valve body, a pressure relief opening, a pressure regulating cylinder and a valve element, the valve element is installed in the valve body, a pressure regulating plate is installed on the valve element through a pressure regulating spring, the valve element and the pressure regulating plate are both in sliding connection with the pressure regulating cylinder, a pressure regulating screw penetrates through the pressure regulating plate and is in threaded connection with the pressure regulating plate, and the pressure regulating screw is in threaded connection with the pressure relief opening. The top end of the pressure adjusting screw penetrates out of the pressure adjusting cylinder and is movably connected with a pressure adjusting handle through a connecting rod in a telescopic mode, a locking spring is installed between the pressure adjusting handle and the top of the pressure adjusting cylinder, a locking ring is further installed on the top of the pressure adjusting cylinder, and teeth meshed with each other are arranged at the close ends of the locking ring and the pressure adjusting handle respectively. When the pressure regulating handle drives the pressure regulating screw rod to rotate through the connecting rod, the pressure regulating plate is controlled to ascend and descend so as to extrude the pressure regulating spring, the pressure regulating handle can be locked under the matching of the locking ring and the teeth, and the locking spring tensions the pressure regulating handle, so that the pressure regulating handle cannot rotate in a shaking or mistaken touch state, and the use safety of the pressure regulating device is effectively enhanced.

Description

Technical Field

[0001] The utility model relates to the technical field of safety valves, in particular to a hydraulic safety valve for a dump truck. Background Art

[0002] A dump truck, also known as a tipper, is a vehicle that unloads cargo using hydraulic or mechanical lifting. It consists of a chassis, a hydraulic lifting mechanism, a cargo compartment, and a power take-off device. To improve safety, a safety valve is typically installed in the hydraulic lifting mechanism of a dump truck. This valve discharges the medium to the outside of the system if the pressure inside the hydraulic lifting mechanism exceeds a specified value.

[0003] However, in order to facilitate the staff to adjust the pressure threshold, the pressure adjustment rod of the existing manual safety valve is generally exposed directly to the outside, and no locking mechanism is provided. As a result, the pressure adjustment rod is easily adjusted by mistake during use, thereby affecting the stability of the set pressure threshold. In addition, for dump trucks, the vehicle is prone to bumps and shakes during driving, which may also cause the pressure adjustment rod to rotate loosely, posing a safety problem.

[0004] Therefore, we propose a dump truck hydraulic safety valve to solve the above problems. Utility Model Content

[0005] The purpose of the utility model is to provide a hydraulic safety valve for a dump truck to solve the problems raised in the above background technology.

[0006] To achieve the above objectives, the present invention provides the following technical solutions:

[0007] A hydraulic safety valve for a dump truck comprises a valve body, a pressure relief port, a pressure regulating cylinder and a valve core, the pressure relief port being arranged on the side of the valve body, the pressure regulating cylinder being mounted on the valve body, the valve core being mounted inside the valve body, and a pressure regulating plate being mounted on the valve core via a pressure regulating spring, the valve core and the pressure regulating plate being both slidably connected to the pressure regulating cylinder, and a pressure regulating screw being passed through and threadedly screwed into the pressure regulating plate, the top end of the pressure regulating screw passing through the pressure regulating cylinder and being movably connected to a pressure regulating handle via a connecting rod, a locking spring being mounted between the pressure regulating handle and the top of the pressure regulating cylinder, and a locking ring being further mounted on the top of the pressure regulating cylinder, the proximal ends of the locking ring and the pressure regulating handle being respectively provided with teeth that mesh with each other.

[0008] In a further embodiment, a straight rail is fixed on the inner wall of the pressure regulating cylinder, and a slider that slides in cooperation with the straight rail is fixed on the periphery of the valve core and the pressure regulating plate.

[0009] In a further embodiment, the valve core and the pressure regulating plate are both provided with a convex ring at one end close to the pressure regulating spring, and the convex ring passes through the coil of the pressure regulating spring.

[0010] In a further embodiment, a slot for inserting a connecting rod is provided at the top end of the pressure-regulating screw, and the slot and the connecting rod adopt a non-cylindrical structure.

[0011] In a further embodiment, a plurality of grooves are evenly arranged on the outer side wall of the pressure regulating handle.

[0012] In a further embodiment, a swivel is rotatably mounted on the inner top of the pressure regulating handle, and the swivel is fixed to the top end of the locking spring.

[0013] In a further embodiment, the pressure regulating screw is rotatably connected to the top of the pressure regulating cylinder via a bearing.

[0014] Compared with the prior art, the beneficial effects of the present invention are:

[0015] The utility model arranges the pressure regulating handle to drive the pressure regulating screw to rotate through the connecting rod, controls the lifting and lowering of the pressure regulating plate to squeeze the pressure regulating spring, thereby adjusting the safety pressure threshold. The pressure regulating handle can be locked with the cooperation of the locking ring and the teeth. The locking spring tightens the pressure regulating handle so that it cannot rotate in the state of shaking or accidental touch. Instead, the pressure regulating handle needs to be disengaged from the limit of the teeth before it can be rotated, thereby effectively enhancing its safety in use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 This is a schematic diagram of the structure of the utility model;

[0017] Figure 2 This is a schematic diagram of a half-cut front view cross-sectional structure of the present invention;

[0018] Figure 3 This is a half-cutaway three-dimensional structural diagram of the present invention;

[0019] Figure 4 This is a schematic diagram of the internal structure of the pressure regulating handle of the utility model in half section.

[0020] In the figure: 1. Valve body; 2. Pressure relief port; 3. Pressure regulating cylinder; 4. Valve core; 5. Pressure regulating spring; 6. Pressure regulating plate; 7. Pressure regulating screw; 71. Slot; 8. Connecting rod; 9. Pressure regulating handle; 91. Groove; 92. Rotating ring; 10. Locking ring; 11. Teeth; 12. Locking spring; 13. Raised ring; 14. Straight rail; 15. Slider. DETAILED DESCRIPTION

[0021] In the description of the present invention, it should be understood that terms such as "center," "longitudinal," "lateral," "upper," "lower," "front," "back," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," and "outer" indicate positions or locations based on the positions or locations shown in the accompanying drawings. These terms are used solely to facilitate the description of the present invention and to simplify the description. They do not indicate or imply that the devices or components referred to must have a specific orientation, be constructed, or operate in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In the description of the present invention, unless otherwise specified, "plurality" means two or more.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "mounted," "connected," and "connected" should be understood broadly. For example, they may refer to fixed, removable, or integral connections; mechanical or electrical connections; direct or indirect connections through an intermediary; and internal communication between two components. Those skilled in the art will understand the specific meanings of these terms in this utility model based on specific circumstances.

[0023] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0024] See also Figure 1-4 , a hydraulic safety valve for a dump truck includes a valve body 1, a pressure relief port 2, a pressure regulating cylinder 3 and a valve core 4, wherein the pressure relief port 2 is arranged on the side of the valve body 1 and is communicated with the interior of the valve body 1, and the pressure regulating cylinder 3 is installed on the valve body 1. For the convenience of later maintenance, the pressure regulating cylinder 3 and the valve body 1 are connected by a flange and multiple sets of bolts and nuts. The valve core 4 is installed inside the valve body 1 to block the liquid inlet of the valve body 1, and a pressure regulating spring 5 is provided on the valve core 4, and a pressure regulating plate 6 is provided on the pressure regulating spring 5. The valve core 4 and the pressure regulating plate 6 are both slidably connected to the pressure regulating cylinder 3, and a pressure regulating screw 7 is passed through and threadedly screwed on the pressure regulating plate 6, so that when the pressure regulating screw 7 rotates, the pressure regulating plate 6 can be driven to rise and fall under the action of the thread, thereby squeezing the pressure regulating spring 5 to adjust the threshold of the safety pressure.

[0025] The valve core 4 and the pressure regulating plate 6 are both provided with a convex ring 13 at one end close to the pressure regulating spring 5 , and the convex ring 13 runs through the coil of the pressure regulating spring 5 , which is beneficial to improving the support stability of the pressure regulating spring 5 .

[0026] The locking ring 10 is provided with a plurality of teeth 11 which are meshed with each other at the top and the bottom of the pressure regulating handle 9 which is provided with a plurality of teeth 11 which are meshed with each other at the top and the bottom of the pressure regulating handle 9 which is provided with a plurality of teeth 11 which are meshed with each other at the top and the bottom of the pressure regulating handle 9 which is provided with a plurality of teeth 11 which are meshed with each other at the top and the bottom of the pressure regulating handle 9 which is provided with a plurality of teeth 11 which are meshed with each other at the top and the bottom of the pressure regulating handle 9 which is provided with a plurality of teeth 11 which are meshed with each other at the top and the bottom of the pressure regulating handle 9 which is provided with a plurality of teeth 11 which are meshed with each other at the top and the bottom of the pressure regulating handle 9 which is provided with a plurality of teeth 11 which are meshed with each other at the top and the bottom

[0027] In order to further improve the stability of the movement of the pressure regulating plate 6 and the valve core 4, a vertical straight rail 14 is fixed on the inner wall of the pressure regulating cylinder 3, and a slider 15 that slides with the straight rail 14 is fixed to the periphery of the valve core 4 and the pressure regulating plate 6. The sliding action of the slider 15 along the straight rail 14 can limit the pressure regulating plate 6 and the valve core 4 to prevent the problem of unevenness on both sides when they move.

[0028] A slot 71 for the connecting rod 8 to be inserted is provided at the top of the pressure-regulating screw 7, and the slot 71 and the connecting rod 8 adopt a non-cylindrical structure, so that the pressure-regulating handle 9 can drive the connecting rod 8 to move telescopically in the slot 71. At the same time, the non-cylindrical structure can avoid the problem of slipping between the connecting rod 8 and the pressure-regulating screw 7 and the inability to transmit.

[0029] A plurality of grooves 91 are evenly arranged on the outer wall of the pressure regulating handle 9 , which is beneficial to increasing the roughness of the outer periphery of the pressure regulating handle 9 , making it easier for the operator to apply force and reducing the problem of slipping when rotating the pressure regulating handle 9 .

[0030] Considering that when both ends of the locking spring 12 are fixed to the pressure-regulating handle 9 and the pressure-regulating cylinder 3, the rotation of the pressure-regulating handle 9 will cause the locking spring 12 to twist, thereby increasing the resistance during rotation. Therefore, a swivel 92 is rotatably installed on the inner top of the pressure-regulating handle 9, and the swivel 92 is fixed to the top of the locking spring 12, so that when the pressure-regulating handle 9 rotates, it rotates relative to the swivel 92, and thus will not cause the locking spring 12 to twist.

[0031] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above and that the present invention can be implemented in other specific forms without departing from the spirit or essential characteristics of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims, not the foregoing description, and all variations within the meaning and range of equivalents of the claims are intended to be encompassed within the present invention. Any reference sign in a claim should not be construed as limiting the claim to which it relates.

[0032] In addition, it should be understood that although this specification is described in terms of implementation methods, not every implementation method contains only one independent technical solution. This narrative method of the specification is only for the sake of clarity. Those skilled in the art should regard the specification as a whole. The technical solutions in each embodiment can also be appropriately combined to form other implementation methods that can be understood by those skilled in the art.

Claims

1. A hydraulic safety valve for a dump truck, comprising a valve body (1), a pressure relief port (2), a pressure regulating cylinder (3) and a valve core (4), characterized in that: The pressure relief port (2) is arranged on the side of the valve body (1), the pressure regulating cylinder (3) is installed on the valve body (1), the valve core (4) is installed inside the valve body (1), and a pressure regulating plate (6) is installed on the valve core (4) through a pressure regulating spring (5), the valve core (4) and the pressure regulating plate (6) are both slidably connected to the pressure regulating cylinder (3), and a pressure regulating screw (7) is passed through and screwed into the pressure regulating plate (6), the top end of the pressure regulating screw (7) passes through the pressure regulating cylinder (3) and is telescopically connected to the pressure regulating handle (9) through a connecting rod (8), a locking spring (12) is installed between the pressure regulating handle (9) and the top of the pressure regulating cylinder (3), and a locking ring (10) is also installed on the top of the pressure regulating cylinder (3), and the locking ring (10) and the pressure regulating handle (9) are respectively provided with mutually meshing teeth (11) at the adjacent ends.

2. A dump truck hydraulic safety valve according to claim 1, characterized in that: A straight rail (14) is fixed on the inner wall of the pressure regulating cylinder (3), and a slider (15) that slides in cooperation with the straight rail (14) is fixed on the periphery of the valve core (4) and the pressure regulating plate (6).

3. The hydraulic safety valve for dump trucks according to claim 1, characterized in that: The valve core (4) and the pressure regulating plate (6) are both provided with a convex ring (13) at one end close to the pressure regulating spring (5), and the convex ring (13) passes through the ring of the pressure regulating spring (5).

4. The hydraulic safety valve for dump trucks according to claim 1, characterized in that: The top end of the pressure regulating screw (7) is provided with a slot (71) for the connecting rod (8) to be inserted into, and the slot (71) and the connecting rod (8) adopt a non-cylindrical structure.

5. The hydraulic safety valve for dump trucks according to claim 1, characterized in that: A plurality of grooves (91) are evenly arranged on the outer side wall of the pressure regulating handle (9).

6. The hydraulic safety valve for dump trucks according to claim 1, characterized in that: A rotating ring (92) is rotatably mounted on the inner top of the pressure regulating handle (9), and the rotating ring (92) is fixed to the top end of the locking spring (12).

7. The hydraulic safety valve for dump trucks according to claim 1, characterized in that: The pressure regulating screw (7) is rotatably connected to the top of the pressure regulating cylinder (3) via a bearing.

Images