Central water outlet high-pressure pump pressure maintaining device for machine tool

Abstract

The central water outlet high-pressure pump pressure maintaining device for the machine tool comprises a pump body and a pressure relief pipe, the pressure relief pipe is connected to the side wall of the pump body, an installation opening is formed in the end, away from the pump body, of the pressure relief pipe, multiple sets of pressure relief holes are formed in the side wall of the pressure relief pipe, and closing plugs are arranged in inner cavities, corresponding to the pressure relief holes, of the pressure relief pipe. A guide rod is arranged in the closing plug in an inserted mode, a reset spring is connected to the upper end face of the closing plug, and an adjusting nut for adjusting the compression range of the reset spring is arranged on the upper side of the reset spring. According to the pressure relief device, the output pressure is prevented from being continuously increased, the pump body structure is prevented from being damaged, larger impact force can be generated on the closing plug along with gradual increase of the pressure, more pressure relief holes can conduct exhaust work, and therefore the pressure relief device can meet the pressure relief work under different high-pressure conditions.

Description

Technical Field

[0001] The utility model relates to the technical field related to pressure maintenance of high-pressure pumps, in particular to a pressure maintaining device of a central water-discharging high-pressure pump for machine tools. Background Art

[0002] A high-pressure pump is a device that provides high-pressure power for high-pressure rotary jet cement slurry. It is used for foundation strengthening and reinforcement of buildings, roads, etc. It can also be used for high-pressure water jets to assist in breaking rocks and dropping coal, supplying fluid to underground hydraulic pillars, pumping high-pressure water with anchored hydraulic expansion metal anchor rods, dredging, desilting and cleaning large underground pipelines, etc. When a high-pressure pump is used, the pressure may become too high over time. Therefore, a pressure sensor is usually installed in the existing high-pressure pump to issue an alarm to facilitate subsequent pressure control. However, in the process of pressure monitoring, issuing an alarm and pressure regulation, the excess gas in the pump body cavity cannot be discharged in time, resulting in the output pressure continuing to increase after the alarm, which can easily cause mechanical accidents.

[0003] Therefore, we propose a pressure maintaining device for a central water outlet high-pressure pump for machine tools to solve the above problems. Utility Model Content

[0004] The purpose of the utility model is to solve the shortcomings of the prior art and to propose a pressure maintaining device for a central water outlet high-pressure pump for a machine tool.

[0005] In order to achieve the above purpose, the present invention adopts the following technical solutions:

[0006] A pressure maintaining device for a central water-outlet high-pressure pump for a machine tool comprises a pump body and a pressure relief pipe, wherein the pressure relief pipe is connected to the side wall of the pump body, an installation opening is provided at one end of the pressure relief pipe away from the pump body, a plurality of groups of pressure relief holes are provided on the side wall of the pressure relief pipe, a closing plug is provided in an inner cavity of the pressure relief pipe corresponding to the position of the pressure relief hole, a guide rod is inserted in the closing plug, a return spring is connected to the upper end surface of the closing plug, and an adjusting nut for adjusting its compression range is provided on the upper side of the return spring.

[0007] Preferably, the pressure relief pipe is detachably connected to the side wall of the pump body.

[0008] Preferably, a single group of the pressure relief holes is arranged in a ring shape on the side wall of the pressure relief pipe, and multiple groups of the pressure relief holes are evenly arranged up and down.

[0009] Preferably, an annular support plate is provided on the inner wall of the pressure relief pipe located below the pressure relief hole, and the closing plug is in contact with the support plate.

[0010] Preferably, a top plate is screwed onto the inner side of the mounting opening, and the upper end of the guide rod is in contact with the top plate.

[0011] Preferably, the upper end of the reset spring is connected to an adjustment plate, and the reset spring and the adjustment plate are both sleeved on the outside of the guide rod.

[0012] Preferably, a threaded section is provided on the side wall of the guide rod corresponding to the position of the adjustment plate, the adjustment nut is threadedly engaged with the threaded section, and the adjustment nut is in close contact with the adjustment plate.

[0013] Compared with the prior art, the beneficial effects of the present invention are:

[0014] When the pressure is too high, the excess gas will impact the closing plug, thereby releasing the closure of the pressure relief pipe and allowing the gas to be discharged from the pressure relief hole, thereby preventing the output pressure from continuing to increase and damaging the pump body structure. Moreover, as the pressure gradually increases, a greater impact force can be generated on the closing plug, and more pressure relief holes can be used for exhaust work, thereby enabling the device to meet the pressure relief work of different high-pressure conditions. At the same time, the compression range of the return spring can be adjusted by utilizing the screw connection of the adjusting nut and the threaded section, thereby controlling the impact force that the closing plug can withstand under normal conditions, thereby adjusting the pressure conditions required for pressure relief according to the actual pressure requirements of different high-pressure pumps. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] Figure 1 This is a schematic diagram of the overall structure of the utility model;

[0016] Figure 2 This is a schematic structural diagram of the pressure relief pipe of the utility model;

[0017] Figure 3 This is a schematic diagram of the cross-sectional structure of the pressure relief pipe of the utility model;

[0018] Figure 4 This is a schematic diagram of the utility model closing plug and its auxiliary structure.

[0019] In the figure: 1-pump body, 2-pressure relief pipe, 3-installation port, 4-pressure relief hole, 5-closing plug, 501-support plate, 6-guide rod, 601-top plate, 7-return spring, 701-adjusting plate, 8-adjusting nut, 801-threaded segment. DETAILED DESCRIPTION

[0020] In the description of the present invention, it should be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", "clockwise", "counterclockwise" and the like to indicate orientations or positional relationships 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 should not be understood as a limitation on the present invention.

[0021] In the description of the present invention, “plurality” means two or more, unless otherwise clearly defined.

[0022] In the description of this utility model, it should be noted that, unless otherwise expressly specified or limited, the terms "installed," "provided with," "mounted / connected," and "connected" should be understood in a broad sense. For example, "connected" can mean a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be internal communication between two components. For those skilled in the art, the specific meanings of the above terms in this utility model can be understood according to the specific circumstances.

[0023] The technical solutions in the embodiments of the present invention will be described clearly and completely below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, rather than all the embodiments.

[0024] Reference Figure 1-4 , a pressure maintaining device of a central water-outlet high-pressure pump for a machine tool, comprising a pump body 1 and a pressure relief pipe 2, the pressure relief pipe 2 being connected to the side wall of the pump body 1, and a sealing structure being provided at the connection between the two, the pressure relief pipe 2 and the side wall of the pump body 1 being detachably connected, the pressure relief pipe 2 can be disassembled and maintained, a mounting port 3 is provided at one end of the pressure relief pipe 2 away from the pump body 1, and a plurality of groups of pressure relief holes 4 are provided on the side wall of the pressure relief pipe 2, a single group of pressure relief holes 4 is arranged in a ring shape on the side wall of the pressure relief pipe 2, and a plurality of groups of pressure relief holes 4 are evenly arranged up and down, through the design of a plurality of groups of pressure relief holes 4, when the closing plug 5 is removed, the pressure relief pipe 2 and the pressure relief hole 4 cooperate to connect the high-pressure pump with the external environment, thereby performing pressure relief work.

[0025] A closing plug 5 is provided in the inner cavity corresponding to the position of the pressure relief pipe 2 and the pressure relief hole 4. An annular support plate 501 is provided on the inner wall of the pressure relief pipe 2 located below the pressure relief hole 4. The closing plug 5 is in contact with the support plate 501. When the internal pressure is too high, the excess gas impacts the closing plug 5, thereby releasing the closure of the pressure relief pipe 2, allowing the gas to be discharged from the pressure relief hole 4. As the pressure gradually increases, a greater impact force can be generated on the closing plug 5, and more pressure relief holes 4 can be used for exhaust work.

[0026] A guide rod 6 is inserted into the closing plug 5, and a top plate 601 is screwed on the inner side of the mounting port 3. The mounting port 3 can be opened to replace and maintain the internal structure, and the adjusting nut 8 can be adjusted at the same time. The upper end of the guide rod 6 is in contact with the top plate 601, and the guide rod 6 guides the moving direction of the closing plug 5. When installing, open the mounting port 3, first put the closing plug 5 and the return spring 7 into the pressure relief pipe 2, so that it is in stable contact with the support plate 501, and then insert the guide rod 6 and the adjusting nut 8.

[0027] A return spring 7 is connected to the upper end surface of the closing plug 5 , an upper end of the return spring 7 is connected to an adjustment plate 701 , and both the return spring 7 and the adjustment plate 701 are sleeved on the outside of the guide rod 6 .

[0028] An adjusting nut 8 for adjusting the compression range of the return spring 7 is provided on the upper side of the return spring 7. A threaded section 801 is provided on the side wall of the guide rod 6 corresponding to the position of the adjusting plate 701. The adjusting nut 8 is threadedly matched with the threaded section 801, and the adjusting nut 8 is fit between the adjusting plate 701. The adjusting nut 8 and the threaded section 801 are threadedly matched, and the compression range of the return spring 7 can be adjusted, thereby controlling the impact force that the closing plug 5 can withstand under normal conditions.

[0029] The above embodiments are preferred implementation methods of the present invention, but the implementation methods of the present invention are not limited to the above embodiments. Any other changes, modifications, substitutions, combinations, and simplifications that do not deviate from the spirit and principles of the present invention should be considered as equivalent replacement methods and are included in the scope of protection of the present invention.

[0030] In the description of the present invention, it should be understood that the terms indicating orientation or positional relationships are based on the orientation 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. Therefore, it cannot be understood as a limitation on the present invention.

Claims

1. A pressure maintaining device for a central water outlet high-pressure pump for a machine tool, comprising a pump body (1) and a pressure relief pipe (2), wherein the pressure relief pipe (2) is connected to the side wall of the pump body (1), and is characterized in that: The pressure relief pipe (2) is provided with a mounting opening (3) at one end away from the pump body (1), and a plurality of pressure relief holes (4) are provided on the side wall of the pressure relief pipe (2). A closing plug (5) is provided in the inner cavity of the pressure relief pipe (2) corresponding to the position of the pressure relief holes (4), and a guide rod (6) is inserted into the closing plug (5). A return spring (7) is connected to the upper end surface of the closing plug (5), and an adjusting nut (8) for adjusting the compression range of the return spring (7) is provided on the upper side of the return spring (7).

2. A pressure maintaining device for a central water outlet high-pressure pump for a machine tool according to claim 1, characterized in that: The pressure relief pipe (2) is detachably connected to the side wall of the pump body (1).

3. A pressure maintaining device for a central water outlet high-pressure pump for a machine tool according to claim 1, characterized in that: A single group of the pressure relief holes (4) is arranged in a ring-shaped manner on the side wall of the pressure relief pipe (2), and multiple groups of the pressure relief holes (4) are evenly arranged in an upper and lower manner.

4. A pressure maintaining device for a central water outlet high-pressure pump for a machine tool according to claim 1, characterized in that: An annular support plate (501) is provided on the inner wall of the pressure relief pipe (2) located below the pressure relief hole (4), and the closing plug (5) is in contact with the support plate (501).

5. The pressure maintaining device of a central water outlet high-pressure pump for a machine tool according to claim 1, characterized in that: A top plate (601) is screwed onto the inner side of the mounting opening (3), and the upper end of the guide rod (6) is in contact with the top plate (601).

6. A pressure maintaining device for a central water outlet high-pressure pump for a machine tool according to claim 1, characterized in that: The upper end of the return spring (7) is connected to an adjustment plate (701), and the return spring (7) and the adjustment plate (701) are both sleeved on the outside of the guide rod (6).

7. A pressure maintaining device for a central water outlet high-pressure pump for a machine tool according to claim 6, characterized in that: A threaded section (801) is provided on the side wall of the guide rod (6) corresponding to the position of the adjustment plate (701), the adjustment nut (8) is threadedly engaged with the threaded section (801), and the adjustment nut (8) is fitted with the adjustment plate (701).

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