External gear pump of hydraulic station

Abstract

The utility model relates to the technical field of hydraulic station external gear pumps, in particular to a hydraulic station external gear pump which comprises a base, an installation plate is fixedly connected to the upper end of the base, a pump body is fixedly connected to one side of the installation plate, a liquid inlet pipe is fixedly connected to one side of the pump body, a liquid outlet pipe is fixedly connected to the other side of the pump body, and a connecting cylinder is connected to the end of the liquid inlet pipe in a threaded mode. A fine filter screen is fixedly connected to the end, located in the liquid inlet pipe, of the connecting cylinder and used for filtering liquid entering the pump body, a rough filtering assembly is in threaded connection with the interior of the connecting cylinder, and the end, away from the liquid inlet pipe, of the connecting cylinder is in threaded connection with an external liquid connecting pipe; the connecting cylinder is installed on the liquid inlet pipe, liquid enters the pump body through the connecting cylinder and the liquid inlet pipe, large impurities in the liquid are intercepted through the rough filtering assembly, small impurities in the liquid passing through the rough filtering assembly are intercepted through the fine filtering net, and the situation that many impurities enter the pump body to corrode or abrade gears is prevented.

Description

Technical Field

[0001] The utility model relates to the field of external gear pumps, in particular to an external gear pump for a hydraulic station. Background Art

[0002] A hydraulic station is a hydraulic source device consisting of a hydraulic pump, a driving motor, an oil tank, a directional valve, a throttle valve, a relief valve, etc., or a hydraulic device including a control valve. The commonly used pump structures in hydraulic pumps are: gear pumps, vane pumps and plunger pumps. An external gear pump refers to a gear pump composed of external gears, which is mainly composed of a driving gear, a driven gear, a pump body, a pump cover and a safety valve.

[0003] Existing hydraulic station external gear pumps, such as a double-row external meshing gear pump proposed in patent application number "CN202022045169.2", are convenient for fixing the pump body and transporting it through structures such as the pump body, mounting base plate, fixing plate, and clamping plate.

[0004] Two sets of gears mesh and rotate inside the pump body. Liquid enters one side of the pump body and exits the other side. When liquid with a lot of impurities enters the pump body, the gears will be corroded and worn, causing the performance of the internal parts of the pump body to be easily damaged. Therefore, a hydraulic station external gear pump is proposed. Utility Model Content

[0005] The utility model aims to provide an external gear pump for a hydraulic station to solve the problems raised in the above-mentioned background technology.

[0006] The purpose of the utility model can be achieved through the following technical solutions:

[0007] A hydraulic station external gear pump comprises a base, a mounting plate is fixedly connected to the upper end of the base, a pump body is fixedly connected to one side of the mounting plate, a liquid inlet pipe is fixedly connected to one side of the pump body, a liquid outlet pipe is fixedly connected to the other side, a connecting cylinder is threadedly connected to the end of the liquid inlet pipe, a fine filter is fixedly connected to one end of the connecting cylinder located in the liquid inlet pipe, the fine filter is used to filter the liquid entering the pump body, a coarse filter assembly is threadedly connected to the inside of the connecting cylinder, and one end of the connecting cylinder away from the liquid inlet pipe is threadedly connected to the external liquid connecting pipe.

[0008] Preferably, the coarse filter assembly comprises a mounting cylinder, the outer wall of the mounting cylinder is threadedly connected to the inner wall of the connecting cylinder, and the coarse filter is fixedly connected to one end of the mounting cylinder close to the fine filter.

[0009] Preferably, an anti-slip ring is fixedly connected to the outer side wall of the connecting cylinder, a driving block is fixedly connected to a side of the coarse filter away from the fine filter, and a side of the driving block away from the coarse filter is configured to be blade-shaped.

[0010] Preferably, a silencer cover is clamped on the upper end of the base, the silencer cover is arranged outside the pump body, and elastic clamps are fixedly connected to both sides of the lower end of the silencer cover, and the shape of the two sets of elastic clamps are both set to be "U"-shaped.

[0011] Preferably, two groups of card slots are opened on the upper end of the base, and the two groups of elastic card plates are respectively plugged into the two groups of card slots, and the side walls of the two groups of elastic card plates are fixed with card blocks, and the two groups of card blocks are respectively plugged into the inner walls of the two groups of card slots.

[0012] Preferably, a support seat is fixedly connected to the upper end of the base, one end of the pump body is fixedly connected to the upper end of the support seat, and a shock-absorbing pad is fixedly connected to the lower end of the base.

[0013] Beneficial effects of the utility model:

[0014] The utility model installs a connecting tube on the liquid inlet pipe, and the liquid enters the pump body through the connecting tube and the liquid inlet pipe, firstly passes through a coarse filter component to intercept large impurities in the liquid, and then passes through a fine filter screen to intercept small impurities in the liquid passing through the coarse filter component, thereby preventing a large amount of impurities from entering the pump body and corroding or wearing the gears. BRIEF DESCRIPTION OF THE DRAWINGS

[0015] In order to more clearly illustrate the technical solutions in the embodiments of the utility model or the prior art, the drawings required for use in the embodiments or the prior art description are briefly introduced below. Obviously, for ordinary technicians in this field, other drawings can be obtained based on these drawings without creative work.

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

[0017] Figure 2 This is a schematic diagram of the internal structure of the silencer cover of the utility model;

[0018] Figure 3 This is a schematic diagram of the cross-sectional structure of the silencer cover of the utility model;

[0019] Figure 4 This is a schematic diagram of the pump structure of the utility model;

[0020] Figure 5 This is a schematic diagram of the cross-sectional structure of the connecting tube of the utility model;

[0021] Figure 6 yes Figure 3 A schematic diagram of the structure at A;

[0022] The reference numerals in the figures are as follows:

[0023] 1. Pump body; 2. Base; 3. Shock-absorbing pad; 4. Mounting plate; 5. Silence cover; 6. Elastic card plate; 7. Card slot; 8. Card block; 9. Liquid inlet pipe; 10. Liquid outlet pipe; 11. Connecting cylinder; 12. Anti-slip ring; 13. Fine filter screen; 14. Mounting cylinder; 15. Drive block; 16. Coarse filter screen; 17. Support seat. DETAILED DESCRIPTION

[0024] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0025] A hydraulic station external gear pump, such as Figure 1-Figure 6 As shown, it includes a base 2, a mounting plate 4 is fixedly connected to the upper end of the base 2, a pump body 1 is fixedly connected to one side of the mounting plate 4, a liquid inlet pipe 9 is fixedly connected to one side of the pump body 1, a liquid outlet pipe 10 is fixedly connected to the other side, a connecting tube 11 is threadedly connected to the end of the liquid inlet pipe 9, a fine filter screen 13 is fixedly connected to one end of the connecting tube 11 located in the liquid inlet pipe 9, and the fine filter screen is used to filter the liquid entering the pump body 1, a coarse filter component is threadedly connected to the inside of the connecting tube 11, and one end of the connecting tube 11 away from the liquid inlet pipe 9 is threadedly connected to the external liquid connecting pipe.

[0026] The pump body 1 is fixedly mounted through the base 2 and the mounting plate 4 so that the center of gravity of the pump body 1 is above the base 2 to keep the entire external gear pump stable. The liquid enters the pump body 1 through the liquid inlet pipe 9, passes through the two sets of external meshing gears inside the pump body 1, and flows out through the liquid outlet pipe 10. A connecting tube 11 is installed on the liquid inlet pipe 9. The connecting tube 11 is threadedly connected to the liquid inlet pipe 9, and is convenient for assembly and disassembly. The liquid enters the pump body 1 through the connecting tube 11 and the liquid inlet pipe 9, and first passes through the coarse filter component to intercept large impurities in the liquid to prevent large impurities from being blocked on the fine filter screen 13. Then, the fine filter screen 13 intercepts small impurities in the liquid passing through the coarse filter component to reduce the impurity content in the liquid, prevent more impurities from entering the pump body 1 to corrode or wear the gears, and increase the service life of the external gear pump of the hydraulic station.

[0027] The coarse filter assembly includes a mounting cylinder 14 , the outer wall of the mounting cylinder 14 is threadedly connected to the inner wall of the connecting cylinder 11 , and a coarse filter 16 is fixedly connected to one end of the mounting cylinder 14 close to the fine filter 13 .

[0028] like Figure 5 As shown, the installation cylinder 14 is threadedly connected to the inner wall of the connecting cylinder 11 , so that the installation cylinder 14 is easy to disassemble and assemble, and the liquid must pass through the coarse filter screen 16 before it can contact the fine filter screen 13 .

[0029] The outer wall of the connecting tube 11 is fixedly connected with an anti-skid ring 12 , and a driving block 15 is fixedly connected to a side of the coarse filter 16 away from the fine filter 13 . The side of the driving block 15 away from the coarse filter 16 is configured to be blade-shaped.

[0030] like Figure 5As shown, the anti-slip ring 12 is convenient for twisting the connecting tube 11, and the driving block 15 is clamped by external parts (clips and other parts), which can drive the installation tube 14 to rotate, making it easy to disassemble and replace or clean the installation tube 14. The blade-shaped driving block 15 makes large impurities impact the driving block 15 during the impact of water flow, so that the large impurities are dispersed or cut apart, preventing the large impurities from blocking the mesh of the coarse filter 16.

[0031] The upper end of the base 2 is clamped with a silencer 5, which is arranged outside the pump body 1. Both sides of the lower end of the silencer 5 are fixedly connected with elastic clamps 6, and the shape of the two sets of elastic clamps 6 is set to be "U"-shaped.

[0032] like Figure 1-Figure 2 As shown, the silencer cover 5 can reduce the noise of the external gear pump spreading to the surroundings during operation, and the elastic clamping plate 6 is convenient for installing the silencer cover 5.

[0033] The upper end of the base 2 is provided with two groups of slots 7, and the two groups of elastic clamps 6 are respectively plugged into the two groups of slots 7. The side walls of the two groups of elastic clamps 6 are fixed with clamping blocks 8, and the two groups of clamping blocks 8 are respectively clamped into the inner walls of the two groups of slots 7.

[0034] like Figure 3 , Figure 6 As shown, the elastic card plate 6 is inserted into the card slot 7, and the card block 8 of the elastic card plate 6 is engaged with the inside of the card slot 7 to prevent the elastic card plate 6 from being separated from the card slot 7. The elastic card plate 6 can be separated from the card slot 7 by squeezing the end of the elastic card plate 6 and pulling it upward.

[0035] The upper end of the base 2 is fixedly connected to a support seat 17 , one end of the pump body 1 is fixedly connected to the upper end of the support seat 17 , and the lower end of the base 2 is fixedly connected to a shock-absorbing pad 3 .

[0036] like Figure 2 As shown, the support seat 17 supports the rear of the pump body 1 to prevent the center of gravity of the pump body 1 from being unstable, and the shock-absorbing pad 3 reduces the vibration between the pump body 1 and the ground during operation, thereby reducing noise.

[0037] The working principle of a hydraulic station external gear pump provided by the utility model is as follows:

[0038] The pump body 1 is fixedly installed through the base 2, the support seat 17 and the mounting plate 4 to keep the entire external gear pump stable. The liquid enters the pump body 1 through the connecting tube 11 and the liquid inlet pipe 9, and first passes through the coarse filter component to intercept large impurities in the liquid to prevent large impurities from being blocked on the fine filter screen 13. The fine filter screen 13 then intercepts small impurities in the liquid passing through the coarse filter component to reduce the impurity content in the liquid, prevent more impurities from entering the pump body 1 and corroding or wearing the gears, and increase the service life of the external gear pump of the hydraulic station.

[0039] The above shows and describes the basic principle, main features and advantages of the utility model. Those skilled in the art should understand that the utility model is not limited by the above embodiments, and the above embodiments and descriptions are only for explaining the principle of the utility model. Without departing from the spirit and scope of the utility model, the utility model may have various changes and improvements, and these changes and improvements fall within the scope of the utility model to be protected.

Claims

1. A hydraulic station external gear pump, comprising a base (2), characterized in that: The upper end of the base (2) is fixedly connected to a mounting plate (4), one side of the mounting plate (4) is fixedly connected to a pump body (1), one side of the pump body (1) is fixedly connected to a liquid inlet pipe (9), and the other side is fixedly connected to a liquid outlet pipe (10), the end of the liquid inlet pipe (9) is threadedly connected to a connecting tube (11), one end of the connecting tube (11) located inside the liquid inlet pipe (9) is fixedly connected to a fine filter screen (13), and the fine filter screen is used to filter the liquid entering the pump body (1), the interior of the connecting tube (11) is threadedly connected to a coarse filter assembly, and one end of the connecting tube (11) away from the liquid inlet pipe (9) is threadedly connected to an external liquid connecting pipe.

2. The external gear pump of a hydraulic station according to claim 1, characterized in that: The coarse filter assembly comprises a mounting cylinder (14), the outer wall of the mounting cylinder (14) being threadedly connected to the inner wall of the connecting cylinder (11), and a coarse filter (16) being fixedly connected to one end of the mounting cylinder (14) close to the fine filter (13).

3. The external gear pump of a hydraulic station according to claim 2, characterized in that: The outer wall of the connecting cylinder (11) is fixedly connected with an anti-slip ring (12), and the side of the coarse filter (16) away from the fine filter (13) is fixedly connected with a driving block (15), and the side of the driving block (15) away from the coarse filter (16) is configured to be blade-shaped.

4. The external gear pump of a hydraulic station according to claim 1, characterized in that: The upper end of the base (2) is clamped with a silencer cover (5), which is arranged outside the pump body (1). Both sides of the lower end of the silencer cover (5) are fixedly connected with elastic clamping plates (6), and the shape of the two sets of elastic clamping plates (6) is set to be "U"-shaped.

5. The external gear pump of a hydraulic station according to claim 4, characterized in that: Two groups of card slots (7) are provided at the upper end of the base (2), and the two groups of elastic card plates (6) are respectively plugged into and matched with the two groups of card slots (7). The side walls of the two groups of elastic card plates (6) are fixedly connected with card blocks (8), and the two groups of card blocks (8) are respectively plugged into and matched with the inner walls of the two groups of card slots (7).

6. The external gear pump of a hydraulic station according to claim 1, characterized in that: The upper end of the base (2) is fixedly connected to a support seat (17), one end of the pump body (1) is fixedly connected to the upper end of the support seat (17), and the lower end of the base (2) is fixedly connected to a shock-absorbing pad (3).

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