Plunger pump convenient for constant pressure regulation

Abstract

The utility model provides a plunger pump convenient for constant pressure regulation, which comprises a plunger pump body, a thin cylinder drives a connecting block to move back and forth, drives a swing rod to swing, and drives a disc and a rotating shaft to rotate through swinging, so that a filter plate rotates in an auxiliary pipeline to filter impurities in a fluid body. The self-suction capacity of the plunger pump body is improved, the constant-pressure influence on the interior of the plunger pump body is reduced, an inner cavity of an inserting hole is inserted through an inserting rod, fixing of a filter screen can be completed, the filtering effect is further improved, an arc-shaped cover plate is inserted into an inner cavity of an inserting groove through an inserting block, the arc-shaped cover plate is tightly attached to an arc-shaped notch, and therefore the self-suction capacity of the plunger pump body is improved. The liquid inlet pipe and the auxiliary pipeline are connected more tightly under the action of the first flange plate and the second flange plate, the liquid outlet pipe and the arc-shaped cover plate are connected more tightly under the action of the first arc-shaped connecting plate and the second arc-shaped connecting plate, the sealing performance during fluid conveying is guaranteed, and normal conveying of liquid media is prevented from being affected.

Description

Technical Field

[0001] The utility model relates to a plunger pump which is convenient for constant pressure regulation and belongs to the technical field of plunger pumps. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder to change the volume of the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment.

[0003] A Chinese public patent (publication number: CN202017615U) discloses a constant pressure controlled axial piston pump, including a valve body, a channel with a valve core installed in the valve body, a hole communicating with the channel at the left end of the valve core, the right end of the valve core is mounted on a spring seat, a spring is mounted on the spring seat, a gasket connected to the adjusting screw is mounted on the right side of the spring, and the channel is provided with a first port connected to the oil outlet of the axial piston pump body, a second port connected to the oil chamber at the large end of the control piston of the axial piston pump body, and a third port connected to the oil leakage port of the axial piston pump body from left to right, a damping oil channel is provided between the second port and the third port, and a damping screw plug is provided on the damping oil channel. The utility model has a reasonable structure, simple process, convenient adjustment, strong versatility, and stable constant pressure;

[0004] Although the above patent balances the liquid pressure on the left side of the valve core of the constant pressure control valve with the spring force to make the valve core opening reach a balanced state and maintain a constant pressure in the system, the above patent still has certain defects. There are many types of plunger pumps. At present, some problems usually occur during the installation and use of existing plunger pumps. During the process of the plunger pump conveying fluid, the fluid flowing into the plunger pump usually has a lot of impurities and dirt. Sometimes the fluid needs to be filtered to remove some of the impurities and dirt. During the long-term use of the above patent, it is easy for the filter residue to accumulate more and more, which will reduce the self-priming ability of the plunger pump, reduce the volumetric efficiency, increase the oil suction resistance, and have a greater impact on the constant pressure inside the plunger pump, resulting in a decrease in the delivery efficiency of the plunger pump.

[0005] Therefore, a plunger pump which is convenient for constant pressure regulation is proposed. Utility Model Content

[0006] In view of this, the utility model provides a plunger pump that is easy to adjust to a constant pressure, so as to solve or alleviate the technical problems existing in the prior art, and at least provide a beneficial choice.

[0007] The technical solution of the utility model is achieved as follows: a plunger pump that is easy to adjust constant pressure includes a plunger pump body, the right side of the front end of the plunger pump body is connected to a liquid inlet pipe, the left side of the front end of the plunger pump body is connected to a liquid outlet pipe, the inner surface of the liquid inlet pipe is provided with a filter assembly, the filter assembly includes an auxiliary pipeline, a positioning bolt, a first flange, a second flange, a support frame, a thin cylinder, a connecting block, a swing rod, a connecting column, a disc, a rotating shaft and a filter plate, the inner surface of the liquid outlet pipe is provided with an auxiliary device, the auxiliary device includes an arc cover plate, a positioning screw, a first arc connecting plate, a second arc connecting plate, an arc notch, a slot, an insert block, a fixing block, a jack, a filter screen and an insert rod, and the first flange is fixedly connected to the front end of the liquid inlet pipe.

[0008] Further preferably, the second flange is fixedly connected to the rear end of the auxiliary pipeline, the first flange and the second flange are threadedly connected by positioning bolts, the support frame is fixedly connected to the top of the auxiliary pipeline, the thin cylinder is fixedly connected to the rear side of the support frame, and the rear side of the connecting block is fixedly connected to the output end of the thin cylinder.

[0009] Further preferably, the swing arm is movably connected to the front side of the top of the connecting block through a bearing, the top of the connecting column is fixedly connected to the front side of the bottom of the swing arm, the top of the disc is fixedly connected to the bottom of the connecting column, the middle end of the bottom of the disc is fixedly connected to a rotating shaft, and the filter plate is fixedly connected to both sides of the rotating shaft surface.

[0010] Further preferably, the first arc connecting plate is fixedly connected to the front and rear sides of the middle end of the liquid outlet pipe, the second arc connecting plate is fixedly connected to the front and rear sides of the arc cover plate, the first arc connecting plate and the second arc connecting plate are threadedly connected by a positioning screw, the arc notch is opened at the top of the middle end of the liquid outlet pipe, the slot is opened at the left and right sides of the top of the arc notch, the plug block is fixedly connected to the left and right sides of the bottom of the arc cover plate, and the bottom of the plug block is inserted into the inner cavity of the slot.

[0011] Further preferably, the fixing block is fixedly connected to the middle end of the bottom of the inner cavity of the arc-shaped cover plate, the socket is opened on the rear side of the fixing block, the insertion rod is fixedly connected to the front side of the filter screen, and the front side of the insertion rod is inserted into the inner cavity of the socket.

[0012] Further preferably, sliders are fixedly connected to the left and right sides of the connecting block, and sliding grooves are provided on the left and right sides of the inner cavity of the supporting frame, and the outer sides of the sliders are slidably connected to the inner cavity of the sliding grooves.

[0013] Further preferably, a plurality of rubber shock-absorbing springs are fixedly connected to the outer surface of the plunger pump body, a shell is fixedly connected to the outer surface of the rubber shock-absorbing spring, an oil dripping hole is opened at the middle end of the top of the plunger pump body, and an oil guide pipe is connected to the middle end of the top of the shell.

[0014] The embodiment of the utility model has the following advantages due to the adoption of the above technical solution:

[0015] 1. The utility model drives the connecting block to move forward and backward through a thin cylinder, and drives the swing rod to swing. The swing drives the disc and the rotating shaft to rotate, so that the filter plate rotates inside the auxiliary pipeline to filter impurities in the fluid, thereby improving the self-priming ability of the plunger pump body and reducing the influence of the constant pressure inside the plunger pump body. The filter screen can be fixed by plugging the inner cavity of the plug hole through the plug rod, and the filtering effect can be further improved. The arc cover plate is plugged into the inner cavity of the slot through the plug block, so that the arc cover plate and the arc notch are tightly fitted. The liquid inlet pipe and the auxiliary pipeline are connected more tightly through the action of the first flange and the second flange. The liquid outlet pipe and the arc cover plate are connected more tightly through the action of the first arc connecting plate and the second arc connecting plate, thereby ensuring the sealing during fluid transportation and avoiding affecting the normal transportation of the liquid medium.

[0016] 2. The utility model can provide power for the rotation of the rotating shaft by arranging a thin cylinder, can filter impurities in the fluid by arranging a filter plate, can make the arc-shaped cover plate fit tightly with the arc-shaped notch by arranging an insert block and a slot, and can fix the filter screen by arranging an insert hole and an insert rod.

[0017] The above summary is for the purpose of description only and is not intended to be limiting in any way. In addition to the illustrative aspects, embodiments and features described above, further aspects, embodiments and features of the utility model will be readily apparent by reference to the accompanying drawings and the following detailed description. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present application. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0019] Figure 1 It is a three-dimensional front view structural schematic diagram of the utility model;

[0020] Figure 2 This is a schematic diagram of the structure of the shell of the utility model in a disassembled state;

[0021] Figure 3This is a schematic diagram of the structure of the filter assembly of the utility model;

[0022] Figure 4 This is a schematic diagram of the auxiliary device structure of the utility model.

[0023] Figure numerals: 1. plunger pump body; 2. filter assembly; 201. auxiliary pipeline; 202. positioning bolt; 203. first flange; 204. second flange; 205. support frame; 206. thin cylinder; 207. connecting block; 208. swing rod; 209. connecting column; 210. disc; 211. rotating shaft; 212. filter plate; 3. liquid inlet pipe; 4. liquid outlet pipe; 5. auxiliary device; 501. arc cover plate; 502. positioning screw; 503. first arc connecting plate; 504. second arc connecting plate; 505. arc notch; 506. slot; 507. plug block; 508. fixing block; 509. socket; 510. filter screen; 511. plug rod; 6. slider; 7. slide groove; 8. rubber shock-absorbing spring; 9. shell; 10. oil drip hole; 11. oil guide pipe. DETAILED DESCRIPTION

[0024] In the following, only some exemplary embodiments are briefly described. As those skilled in the art will appreciate, the described embodiments may be modified in various ways without departing from the spirit or scope of the present invention. Therefore, the drawings and descriptions are considered to be exemplary and non-restrictive in nature.

[0025] The embodiments of the present utility model are described in detail below with reference to the accompanying drawings.

[0026] Example 1

[0027] like Figure 1-4 As shown, the embodiment of the utility model provides a plunger pump that is convenient for constant pressure regulation, including a plunger pump body 1, the right side of the front end of the plunger pump body 1 is connected to a liquid inlet pipe 3, the left side of the front end of the plunger pump body 1 is connected to a liquid outlet pipe 4, the inner surface of the liquid inlet pipe 3 is provided with a filter assembly 2, the filter assembly 2 includes an auxiliary pipeline 201, a positioning bolt 202, a first flange 203, a second flange 204, a support frame 205, a thin cylinder 206, a connecting block 207, a swing rod 208, a connecting column 209, a disc 210, a rotating shaft 211 and a filter plate 212, and the inner surface of the liquid outlet pipe 4 is provided with an auxiliary device 5, the auxiliary device 5 includes an arc-shaped cover plate 501, a positioning screw 502, a first arc-shaped connecting plate 503, a second arc-shaped connecting plate 504, an arc-shaped notch 505, a slot 506, an insert block 507, a fixing block 508, a jack 509, a filter screen 510 and an insert rod 511;

[0028] The first flange 203 is fixedly connected to the front end of the liquid inlet pipe 3 .

[0029] The thin cylinder 206 drives the connecting block 207 to move forward and backward, and drives the swing rod 208 to swing. The swing drives the disc 210 and the rotating shaft 211 to rotate, so that the filter plate 212 rotates inside the auxiliary pipe 201 to filter the impurities in the fluid, thereby improving the self-priming ability of the plunger pump body 1 and reducing the influence of the constant pressure inside the plunger pump body 1. The plug rod 511 is connected to the inner cavity of the plug hole 509 to complete the fixing of the filter screen 510, further improving the filtering effect. The arc-shaped cover plate 501 is inserted into the inner cavity of the slot 506 through the plug block 507, so that the arc-shaped cover plate 501 fits tightly with the arc-shaped notch 505, and the liquid inlet pipe 3 and the auxiliary pipe 201 are connected more tightly through the action of the first flange 203 and the second flange 204, and the liquid outlet pipe 4 and the arc-shaped cover plate 501 are connected more tightly through the action of the first arc-shaped connecting plate 503 and the second arc-shaped connecting plate 504, thereby ensuring the sealing during fluid transportation and avoiding affecting the normal transportation of the liquid medium.

[0030] Example 2

[0031] In one embodiment, the second flange 204 is fixedly connected to the rear end of the auxiliary pipe 201, the first flange 203 and the second flange 204 are threadedly connected by positioning bolts 202, the support frame 205 is fixedly connected to the top of the auxiliary pipe 201, the thin cylinder 206 is fixedly connected to the rear side of the support frame 205, the rear side of the connecting block 207 and the output end of the thin cylinder 206 are fixedly connected, the swing rod 208 is movably connected to the front side of the top of the connecting block 207 through a bearing, the top of the connecting column 209 is fixedly connected to the front side of the bottom of the swing rod 208, the top of the disc 210 is fixedly connected to the bottom of the connecting column 209, and the bottom of the disc 210 is fixedly connected to the bottom of the connecting column 209. The middle end of the part is fixedly connected with a rotating shaft 211, the filter plate 212 is fixedly connected to both sides of the surface of the rotating shaft 211, the first arc connecting plate 503 is fixedly connected to the front and rear sides of the middle end of the liquid outlet pipe 4, the second arc connecting plate 504 is fixedly connected to the front and rear sides of the arc cover plate 501, the first arc connecting plate 503 and the second arc connecting plate 504 are threadedly connected by a positioning screw 502, an arc notch 505 is opened at the top of the middle end of the liquid outlet pipe 4, a slot 506 is opened on the left and right sides of the top of the arc notch 505, an insert block 507 is fixedly connected to the left and right sides of the bottom of the arc cover plate 501, and the bottom of the insert block 507 is inserted into the inner cavity of the slot 506.

[0032] By providing a thin cylinder 206, power can be provided for the rotation of the rotating shaft 211. By providing a filter plate 212, impurities in the fluid can be filtered. By providing an insert block 507 and a slot 506, the arc-shaped cover plate 501 can be tightly fitted with the arc-shaped notch 505.

[0033] Example 3

[0034] In one embodiment, the fixed block 508 is fixedly connected to the middle end of the bottom of the inner cavity of the arc-shaped cover plate 501, the socket 509 is opened on the rear side of the fixed block 508, the plug rod 511 is fixedly connected to the front side of the filter screen 510, and the front side of the plug rod 511 is inserted into the inner cavity of the socket 509, the left and right sides of the connecting block 207 are fixedly connected with sliders 6, the left and right sides of the inner cavity of the support frame 205 are opened with slide grooves 7, the outer side of the slider 6 is slidably connected to the inner cavity of the slide groove 7, the outer surface of the plunger pump body 1 is fixedly connected with a plurality of rubber shock-absorbing springs 8, the outer surface of the rubber shock-absorbing spring 8 is fixedly connected with the outer shell 9, the middle end of the top of the plunger pump body 1 is opened with an oil drip hole 10, and the middle end of the top of the outer shell 9 is connected with an oil guide pipe 11.

[0035] By setting the socket 509 and the rod 511, the filter screen 510 can be fixed, and by setting the slider 6 and the slide groove 7, the stability of the connecting block 207 during movement can be improved. By setting the rubber shock-absorbing spring 8 and the outer shell 9, the vibration of the plunger pump body 1 can be buffered to prevent large noise caused by excessive vibration.

[0036] When the utility model is working: the liquid inlet pipe 3 and the auxiliary pipeline 201 are connected with the first flange 203 and the second flange 204 through the positioning bolts 202, and the inner cavity of the insertion hole 509 is plugged into the plug rod 511 to complete the fixing of the filter screen 510, and the arc cover plate 501 is plugged into the inner cavity of the slot 506 through the plug block 507, so that the arc cover plate 501 and the arc notch 505 are tightly fitted, and the positioning screw 502 connects the first arc connecting plate 503 with the second arc connecting plate 504, and the liquid outlet pipe 4 and the arc cover plate 501 are connected more tightly through the action of the first arc connecting plate 503 and the second arc connecting plate 504, so as to ensure the sealing performance during fluid transportation and avoid affecting the normal transportation of the liquid medium, and the plunger pump body 1 sucks the fluid into the inner cavity of the auxiliary pipeline 201, and at the same time drives the connecting block 207 to move forward and backward through the thin cylinder 206, and drives the connecting block 207 to swing during the movement of the connecting block 207 The rod 208 swings, and the swing rod 208 drives the connecting column 209 to rotate while the swing rod 208 drives the disc 210 and the rotating shaft 211 to rotate, so that the filter plate 212 rotates inside the auxiliary pipe 201, and the filter plate 212 filters the impurities in the fluid, and enters the interior of the plunger pump body 1 through the rotating shaft 211 and the liquid inlet pipe 3, so that the self-priming ability of the plunger pump body 1 is improved, and the oil suction resistance is reduced. When the oil is discharged from the liquid outlet pipe 4, it passes through the filter screen 510 To further filter the impurities in the fluid and further improve the filtering effect, the first arc-shaped connecting plate 503 is separated from the second arc-shaped connecting plate 504 by the positioning screw 502, the arc-shaped cover plate 501 is lifted up to disengage the plug block 507 from the inner cavity of the slot 506, and the arc-shaped cover plate 501 is removed from the arc-shaped notch 505 of the liquid outlet pipe 4, and the filter screen 510 is pulled to disengage the plug rod 511 from the inner cavity of the socket 509, so that the impurities on the surface of the filter screen 510 can be cleaned.

[0037] The above are only specific implementations of the utility model, but the protection scope of the utility model is not limited thereto. Any technician familiar with the technical field can easily think of various changes or substitutions within the technical scope disclosed by the utility model, which should be included in the protection scope of the utility model. Therefore, the protection scope of the utility model should be based on the protection scope of the claims.

Claims

1. A plunger pump convenient for constant pressure regulation, characterized in that: The invention comprises a plunger pump body (1), wherein the right side of the front end of the plunger pump body (1) is connected to a liquid inlet pipe (3), the left side of the front end of the plunger pump body (1) is connected to a liquid outlet pipe (4), the inner surface of the liquid inlet pipe (3) is provided with a filter assembly (2), and the filter assembly (2) comprises an auxiliary pipeline (201), a positioning bolt (202), a first flange (203), a second flange (204), a support frame (205), a thin cylinder (206), a connecting block (207), a swing rod (208), a connecting column (209), a disc (21 0), a rotating shaft (211) and a filter plate (212), the inner surface of the liquid outlet pipe (4) is provided with an auxiliary device (5), the auxiliary device (5) comprises an arc-shaped cover plate (501), a positioning screw (502), a first arc-shaped connecting plate (503), a second arc-shaped connecting plate (504), an arc-shaped notch (505), a slot (506), an insert block (507), a fixing block (508), a plug hole (509), a filter screen (510) and an insert rod (511), and the first flange (203) is fixedly connected to the front end of the liquid inlet pipe (3).

2. A plunger pump that facilitates constant pressure regulation according to claim 1, characterized in that: The second flange (204) is fixedly connected to the rear end of the auxiliary pipeline (201), the first flange (203) and the second flange (204) are threadedly connected via positioning bolts (202), the support frame (205) is fixedly connected to the top of the auxiliary pipeline (201), the thin cylinder (206) is fixedly connected to the rear side of the support frame (205), and the rear side of the connecting block (207) is fixedly connected to the output end of the thin cylinder (206).

3. A plunger pump that facilitates constant pressure regulation according to claim 1, characterized in that: The swing rod (208) is movably connected to the front side of the top of the connecting block (207) through a bearing, the top of the connecting column (209) is fixedly connected to the front side of the bottom of the swing rod (208), the top of the disc (210) is fixedly connected to the bottom of the connecting column (209), the middle end of the bottom of the disc (210) is fixedly connected to a rotating shaft (211), and the filter plate (212) is fixedly connected to both sides of the surface of the rotating shaft (211).

4. A plunger pump that facilitates constant pressure regulation according to claim 1, characterized in that: The first arc-shaped connecting plate (503) is fixedly connected to the front and rear sides of the middle end of the liquid outlet pipe (4), the second arc-shaped connecting plate (504) is fixedly connected to the front and rear sides of the arc-shaped cover plate (501), the first arc-shaped connecting plate (503) and the second arc-shaped connecting plate (504) are threadedly connected via a positioning screw (502), the arc-shaped notch (505) is provided at the top of the middle end of the liquid outlet pipe (4), the slot (506) is provided at the left and right sides of the top of the arc-shaped notch (505), the plug-in block (507) is fixedly connected to the left and right sides of the bottom of the arc-shaped cover plate (501), and the bottom of the plug-in block (507) is inserted into the inner cavity of the slot (506).

5. A plunger pump that facilitates constant pressure regulation according to claim 1, characterized in that: The fixing block (508) is fixedly connected to the middle end of the bottom of the inner cavity of the arc-shaped cover plate (501); the insertion hole (509) is opened on the rear side of the fixing block (508); the insertion rod (511) is fixedly connected to the front side of the filter screen (510); and the front side of the insertion rod (511) is inserted into the inner cavity of the insertion hole (509).

6. A plunger pump that facilitates constant pressure regulation according to claim 1, characterized in that: The left and right sides of the connecting block (207) are fixedly connected with sliders (6), the left and right sides of the inner cavity of the supporting frame (205) are provided with slide grooves (7), and the outer side of the slider (6) is slidably connected to the inner cavity of the slide groove (7).

7. A plunger pump that facilitates constant pressure regulation according to claim 1, characterized in that: A plurality of rubber shock-absorbing springs (8) are fixedly connected to the outer surface of the plunger pump body (1), and an outer shell (9) is fixedly connected to the outer surface of the rubber shock-absorbing spring (8). An oil drip hole (10) is provided at the middle end of the top of the plunger pump body (1), and an oil guide pipe (11) is connected to the middle end of the top of the outer shell (9).

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