Pressure relief mechanism of unloading valve

Abstract

The utility model relates to the related technical field of unloading valves, in particular to a pressure relief mechanism of an unloading valve, which comprises a valve seat, a sliding valve seat, an adjusting screw and a valve body mounting component, the sliding valve seat is arranged at a fixed position on the valve seat, the adjusting screw is mounted at the front end of the sliding valve seat, and the valve body mounting component is mounted on the sliding valve seat. A valve seat and a sliding valve seat are fixedly connected to the assembly position of the valve body installation assembly, the pressure relief sealing assembly is installed on the sliding valve seat, a pressure relief mechanism of the unloading valve can conduct pressure relief through the sliding valve seat and a built-in pressure relief cavity which are integrated, meanwhile, the unloading valve is of a split assembly structure, and therefore the unloading valve is convenient to assemble and disassemble. The sliding valve seat and the built-in pressure relief cavity which are integrated are adopted in the connecting position of the pressure relief mechanism assembly of the unloading valve, corrosion of residual liquid is prevented, the split structure of the unloading valve is prevented from being damaged, the sliding valve seat and the built-in pressure relief cavity which are of the integrated structure replace a pressure relief mechanism assembling structure, and it is avoided that residual liquid exists in gaps of the unloading valve disassembling structure.

Description

Technical Field

[0001] The utility model relates to the technical field related to unloading valves, in particular to a pressure relief mechanism of an unloading valve. Background Art

[0002] The unloading valve allows a small amount of pressure oil to pass to the oil chamber on the upper part of the sliding valve. The oil chamber has two routes. One route is connected to the emergency shut-off oil route through the check valve. During normal operation, since the oil pressure on the shut-off oil main is equal to the oil pressure of the high-pressure oil, it presses against the check valve and closes it. The pressure oil on the upper part of the sliding valve cannot leak from this route. The other oil route is a contraction hole controlled by a needle valve, which controls the oil passage to the upper chamber of the oil motor piston. Adjusting the opening of the needle valve can adjust the oil pressure on the sliding valve for debugging and setting purposes.

[0003] The existing unloading valve adopts a split assembly structure, and the residual liquid at the connection of the pressure relief mechanism component of the unloading valve is severely corroded, causing damage to the split structure of the unloading valve. The pressure relief mechanism adopts an assembled structure, resulting in residual solution in the disassembly structure of the unloading valve. Utility Model Content

[0004] The purpose of the utility model is to provide a pressure relief mechanism for an unloading valve to solve the problems raised in the above background technology.

[0005] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0006] A pressure relief mechanism of an unloading valve comprises a valve seat, a sliding valve seat, an adjusting screw and a valve body mounting assembly, wherein a sliding valve seat is arranged at a fixed position on the valve seat, an adjusting screw is arranged at a front end of the sliding valve seat, and the valve seat and the sliding valve seat are fixedly connected at an assembly position on the valve body mounting assembly, and further comprises:

[0007] A pressure relief seal assembly, mounted on the sliding valve seat;

[0008] A built-in sealing assembly is arranged on the sliding valve seat;

[0009] Among them, the top end of the sliding valve seat is threadedly connected to a pilot valve seat, the connection between the pilot valve seat and the adjusting screw is movably installed with a U-shaped slot, the top end of the pilot valve seat is threadedly penetrated by a fixing bolt, the rear end of the pilot valve seat is threadedly connected to a plug, the valve seat is threadedly connected with mounting bolts around, the bottom end of the valve seat is fixedly connected to a pressure relief connection port, and the front end of the valve seat is movably installed with a spare screw.

[0010] The pressure relief mechanism of the unloading valve as described above: the adjusting screw and the plug are respectively threadedly connected to the front and rear ends of the pilot valve seat.

[0011] The pressure relief mechanism of the unloading valve as described above: the valve seat and the sliding valve seat are integrally mounted on the unloading valve by threaded fastening of mounting bolts.

[0012] The pressure relief mechanism of the unloading valve as described above: the pressure relief sealing assembly includes a movable ring movably mounted on the pressure relief connection port, and a connecting ring is provided at the threaded fastening portion of the movable ring.

[0013] The pressure relief mechanism of the unloading valve as described above: the connecting ring is fastened and sealed at the connection of the pressure relief connecting port by a movable ring.

[0014] The pressure relief mechanism of the unloading valve as described above: the built-in sealing component includes a built-in pressure relief cavity fixedly connected to the sliding valve seat, and the built-in pressure relief cavity is provided with threaded reinforcement grooves around it.

[0015] The pressure relief mechanism of the unloading valve as described above: the built-in pressure relief cavity is fastened inside the pilot valve seat through a threaded reinforcement groove.

[0016] Compared with the prior art, the utility model has the following beneficial effects: the pressure relief mechanism of the unloading valve can relieve pressure through an integrated sliding valve seat and a built-in pressure relief cavity, and at the same time is conducive to the unloading valve adopting a split assembly structure. The connection between the pressure relief mechanism components of the unloading valve adopts an integrated sliding valve seat and a built-in pressure relief cavity to prevent residual liquid corrosion and prevent damage to the split structure of the unloading valve. The sliding valve seat and the built-in pressure relief cavity of the integrated structure replace the assembly structure of the pressure relief mechanism to avoid the presence of residual solution in the gap of the unloading valve disassembly structure.

[0017] The user manually twists the movable ring, and the movable ring can be tightly connected to the pressure relief connection port. The movable ring can be movably fastened at the connection between the pressure relief connection port and the unloading valve according to the needs of the pressure relief connection port and the unloading valve, so as to prevent the unloading valve from leaking pressure relief and facilitate the user to seal the unloading valve connection. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic diagram of the three-dimensional structure of the utility model;

[0019] Figure 2 This is a schematic diagram of the structure of the pressure relief seal assembly of the utility model;

[0020] Figure 3 This is a schematic diagram of the structure of the built-in sealing component of the utility model.

[0021] In the figure: 1. valve seat; 2. sliding valve seat; 3. adjusting screw; 4. pilot valve seat; 5. U-shaped slot; 6. fixing bolt; 7. plug; 8. mounting bolt; 9. pressure relief connection port; 10. spare screw; 11. connecting ring; 12. movable ring; 13. built-in pressure relief chamber; 14. threaded reinforcement groove. DETAILED DESCRIPTION

[0022] Various exemplary embodiments, features and aspects of the present application will be described in detail below with reference to the accompanying drawings. The same reference numerals in the accompanying drawings represent elements with the same or similar functions. Although various aspects of the embodiments are shown in the accompanying drawings, the drawings are not necessarily drawn to scale unless otherwise specified.

[0023] The word “exemplary” is used exclusively herein to mean “serving as an example, example, or illustration.” Any embodiment described herein as “exemplary” is not necessarily to be construed as preferred or advantageous over other embodiments.

[0024] In addition, in order to better illustrate the present application, numerous specific details are provided in the specific embodiments below. It should be understood by those skilled in the art that the present application can also be implemented without certain specific details. In some examples, methods, means, and elements well known to those skilled in the art are not described in detail in order to highlight the subject matter of the present application.

[0025] See also Figures 1 to 3 A pressure relief mechanism of an unloading valve is proposed, comprising a valve seat 1, a sliding valve seat 2, an adjusting screw 3 and a valve body mounting assembly.

[0026] A sliding valve seat 2 is arranged at a fixed position on the valve seat 1, an adjusting screw 3 is installed at the front end of the sliding valve seat 2, the valve seat 1 and the sliding valve seat 2 are fixedly connected at the assembly position on the valve body mounting assembly, and a pressure relief sealing assembly is installed on the sliding valve seat 2; a built-in sealing assembly is arranged on the sliding valve seat 2;

[0027] The adjusting screw 3 is threadedly connected to the sliding valve seat 2 on the valve seat 1. The unloading valve is adjusted by adjusting the screw 3 so that a small amount of pressure oil passes into the oil chamber on the upper part of the sliding valve seat 2.

[0028] Among them, the top end of the sliding valve seat 2 is threadedly connected to the pilot valve seat 4, the connection between the pilot valve seat 4 and the adjusting screw 3 is movably installed with a U-shaped slot 5, the top end of the pilot valve seat 4 is threadedly penetrated by a fixing bolt 6, the rear end of the pilot valve seat 4 is threadedly connected to a plug 7, the valve seat 1 is threadedly connected with mounting bolts 8 around it, the bottom end of the valve seat 1 is fixedly connected to a pressure relief connection port 9, and the front end of the valve seat 1 is movably installed with a spare screw 10.

[0029] In this embodiment, the adjusting screw 3 is movably installed inside the pilot valve seat 4, so that the pilot valve seat 4 is fixedly installed on the sliding valve seat 2 through the fixing bolt 6, and at the same time, the adjusting screw 3 is threadedly connected to the sliding valve seat 2 on the valve seat 1, and then the plug 7 is sealed at the rear end of the pilot valve seat 4, so that the liquid can enter the valve seat 1 through the pressure relief connection port 9, and the pilot valve seat 4, the sliding valve seat 2 and the valve seat 1 are fastened and installed on the device through the installation bolt 8.

[0030] Preferably, the adjusting screw 3 and the plug 7 are respectively threadedly connected to the front and rear ends of the pilot valve seat 4. After the pilot valve seat 4, the sliding valve seat 2 and the valve seat 1 are assembled by mutual threaded fastening, the adjusting screw 3 and the plug 7 are respectively installed on the pilot valve seat 4 front and back, so that the user can adjust the adjusting screw 3 and the plug 7, which is beneficial to the pilot valve seat 4, the sliding valve seat 2 and the valve seat 1 for pressure relief adjustment.

[0031] Preferably, the valve seat 1 and the sliding valve seat 2 are integrally installed on the unloading valve by threaded fastening of the mounting bolt 8, and the mounting bolt 8 threads penetrate around the valve seat 1 so that the sliding valve seat 2 is fixedly connected to the top of the valve seat 1, and the valve seat 1 and the sliding valve seat 2 are fixedly installed by the mounting bolt 8.

[0032] Please refer to Figure 1 and Figure 2 In this embodiment, the pressure relief sealing assembly includes a movable ring 12 movably mounted on the pressure relief connection port 9 , and a connecting ring 11 is provided at the threaded fastening portion of the movable ring 12 .

[0033] The connecting ring 11 is fixedly connected to the pressure relief connection port 9, and the unloading valve is installed through the pressure relief connection port 9. The connecting ring 11 can be sealed at the pressure relief connection port 9, and the pressure relief connection port 9 can be sealed and installed. Then the movable ring 12 is movably mounted on the pressure relief connection port 9, and the movable ring 12 slides through the pressure relief connection port 9 to the interface of the unloading valve.

[0034] Preferably, the connecting ring 11 is fastened and sealed at the connection of the pressure relief connecting port 9 by the movable ring 12. The user can manually adjust the adjusting screw 3 and the plug 7 on the pilot valve seat 4 to adjust the pressure relief of the pilot valve seat 4, the sliding valve seat 2 and the valve seat 1. The user manually turns the movable ring 12, and the movable ring 12 can be fastened to the pressure relief connecting port 9. The movable ring 12 can be movably fastened at the connection between the pressure relief connecting port 9 and the unloading valve according to the needs of the pressure relief connecting port 9 and the unloading valve to prevent pressure leakage of the unloading valve and facilitate the user to seal the unloading valve connection.

[0035] Please refer to Figure 1 and Figure 3 In this embodiment, the built-in sealing assembly includes a built-in pressure relief cavity 13 fixedly connected to the sliding valve seat 2, and a threaded reinforcement groove 14 is formed around the built-in pressure relief cavity 13.

[0036] The built-in pressure relief chamber 13 is fixedly connected to the sliding valve seat 2. The sliding valve seat 2 and the built-in pressure relief chamber 13 are fixed to the valve seat 1 with an integrated structure. The threaded reinforcement groove 14 is opened around the built-in pressure relief chamber 13. The built-in pressure relief chamber 13 is combined and installed with the pilot valve seat 4 through the threaded reinforcement groove 14. The components in the pilot valve seat 4 can be installed inside the built-in pressure relief chamber 13. The unloading valve is assembled through the sliding valve seat 2, the built-in pressure relief chamber 13 and the pilot valve seat 4.

[0037] Preferably, the built-in pressure relief cavity 13 is fastened inside the pilot valve seat 4 through a threaded reinforcement groove 14. When the components in the pilot valve seat 4 can be installed inside the built-in pressure relief cavity 13, the unloading valve can be assembled through the sliding valve seat 2, the built-in pressure relief cavity 13 and the pilot valve seat 4, and the fixing bolt 6 on the pilot valve seat 4 penetrates and is fastened inside the threaded reinforcement groove 14 on the built-in pressure relief cavity 13 through a threaded manner, and the pilot valve seat 4 and the sliding valve seat 2 are assembled through the threaded reinforcement groove 14.

[0038] As can be seen from the above, the pilot valve seat 4 is fixedly installed on the sliding valve seat 2 by the fixing bolt 6, and the adjusting screw 3 is threadedly connected to the sliding valve seat 2 on the valve seat 1, and then the plug 7 is sealed at the rear end of the pilot valve seat 4, so that the liquid can enter the inside of the valve seat 1 through the pressure relief connection port 9, and the movable ring 12 can be tightly connected to the pressure relief connection port 9. The movable ring 12 can be movably fastened at the connection between the pressure relief connection port 9 and the unloading valve according to the needs of the pressure relief connection port 9 and the unloading valve to prevent pressure relief leakage of the unloading valve.

[0039] The unloading valve is assembled with the pilot valve seat 4 through the sliding valve seat 2 and the built-in pressure relief cavity 13. The fixing bolt 6 on the pilot valve seat 4 is threadedly penetrated and fastened in the threaded reinforcement groove 14 on the built-in pressure relief cavity 13. The components in the pilot valve seat 4 can be installed in the built-in pressure relief cavity 13. The unloading valve is assembled with the pilot valve seat 4 through the sliding valve seat 2 and the built-in pressure relief cavity 13.

[0040] It is obvious 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 features of the present invention. Therefore, the embodiments should be regarded as exemplary and non-restrictive from any point of view, and the scope of the present invention is defined by the appended claims rather than the above description, and it is intended that all changes falling within the meaning and scope of the equivalent elements of the claims be included in the present invention. Any reference numeral in a claim should not be regarded as limiting the claim to which it relates.

[0041] In addition, it should be understood that although the present specification is described according to implementation modes, not every implementation mode contains only one independent technical solution. This description 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 may also be appropriately combined to form other implementation modes that can be understood by those skilled in the art.

Claims

1. A pressure relief mechanism of an unloading valve, comprising a valve seat (1), a sliding valve seat (2), an adjusting screw (3) and a valve body mounting assembly, wherein a fixed portion on the valve seat (1) is provided with a sliding valve seat (2), an adjusting screw (3) is mounted at a front end of the sliding valve seat (2), and an assembly portion on the valve body mounting assembly is fixedly connected with the valve seat (1) and the sliding valve seat (2), characterized in that: It also includes the following: A pressure relief seal assembly, mounted on the sliding valve seat (2); A built-in sealing component, arranged on the sliding valve seat (2); The top end of the sliding valve seat (2) is threadedly connected to a pilot valve seat (4); a U-shaped slot (5) is movably installed at the connection between the pilot valve seat (4) and the adjusting screw (3); a fixing bolt (6) is threadedly penetrated through the top end of the pilot valve seat (4); a plug (7) is threadedly connected to the rear end of the pilot valve seat (4); mounting bolts (8) are threadedly connected around the valve seat (1); a pressure relief connection port (9) is fixedly connected to the bottom end of the valve seat (1); and a spare screw (10) is movably installed at the front end of the valve seat (1).

2. A pressure relief mechanism for an unloading valve according to claim 1, characterized in that: The adjusting screw (3) and the plug (7) are respectively threadedly connected to the front and rear ends of the pilot valve seat (4).

3. A pressure relief mechanism for an unloading valve according to claim 1, characterized in that: The valve seat (1) and the sliding valve seat (2) are integrally mounted on the unloading valve by threaded fastening via a mounting bolt (8).

4. A pressure relief mechanism for an unloading valve according to claim 1, characterized in that: The pressure relief seal assembly comprises a movable ring (12) movably mounted on the pressure relief connection port (9), and a connecting ring (11) is provided at a threaded fastening position on the movable ring (12).

5. A pressure relief mechanism for an unloading valve according to claim 4, characterized in that: The connecting ring (11) is tightly sealed at the connection of the pressure relief connecting port (9) through a movable ring (12).

6. A pressure relief mechanism for an unloading valve according to claim 1, characterized in that: The built-in sealing component comprises a built-in pressure relief cavity (13) fixedly connected to the sliding valve seat (2), and the built-in pressure relief cavity (13) is provided with threaded reinforcement grooves (14) around its periphery.

7. A pressure relief mechanism for an unloading valve according to claim 6, characterized in that: The built-in pressure relief cavity (13) is fastened inside the pilot valve seat (4) via a threaded reinforcement groove (14).

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