CN217976557U

CN217976557U - Plunger pump

Info

Publication number: CN217976557U
Application number: CN202222385139.5U
Authority: CN
Inventors: 潘昱颖
Original assignee: Individual
Current assignee: Individual
Priority date: 2022-09-07
Filing date: 2022-09-07
Publication date: 2022-12-06
Anticipated expiration: 2032-09-07

Abstract

The utility model provides a plunger pump belongs to pump equipment technical field. The plunger cavity connecting structure solves the problem that sealing assemblies are not tight due to the fact that looseness occurs in connection of plunger cavities of existing compression rings and pump cylinder bodies. The plunger pump comprises a crankcase and a cylinder body, wherein a crankshaft connecting rod mechanism is arranged in the crankcase, a plunger cavity and a plunger which is arranged in the plunger cavity in a sliding mode are arranged on the cylinder body, the free end of a connecting rod in the crankshaft connecting rod mechanism arranged in the crankcase is connected with the plunger and drives the plunger to reciprocate in the plunger cavity to provide working pressure for the cylinder body, an opening expanding groove is formed in the cylinder body at the opening of the plunger cavity, a sealing assembly is arranged on the opening expanding groove of the cylinder body, the plunger penetrates through the sealing assembly and enables the sealing assembly and the cylinder body to form relative sliding seal through the sealing assembly, and a limiting structure which prevents the sealing assembly from moving along with the reciprocating displacement of the plunger is arranged on the cylinder body. The utility model discloses can prevent effectively that the clamping ring from taking place the axis drunkenness, can ensure seal assembly's sealing performance.

Description

Plunger pump

Technical Field

The utility model belongs to the technical field of pump equipment, a plunger pump is related to.

Background

The plunger pump is used as common equipment for conveying high-viscosity fluid and is widely applied in various industries; the pressure that the pump cylinder body of plunger pump received is huge, has good leakproofness.

At present to the sealed of pump cylinder body install various seal assembly in mainly the sealed space that forms between plunger portion and the pump cylinder body, then compress tightly with the clamping ring, and generally through threaded connection between current clamping ring and the pump cylinder body, its concrete structure is: the outer wall of the pressing ring is provided with an external thread, the inner wall of the plunger cavity of the pump cylinder body is provided with an internal thread, and the pressing ring is spirally connected to the internal thread of the plunger cavity of the pump cylinder body through the external thread and is used for pressing various sealing components so as to form sealing between the plunger part and the pump cylinder body; after the plunger pump works for a period of time, because the plunger portion and the plunger cavity of the pump cylinder body perform long-time high-pressure reciprocating sliding displacement, the threaded connection performed by the compression ring and the plunger cavity of the pump cylinder body can cause the loosening phenomenon, and the condition that the sealing assembly cannot tightly seal the plunger portion and the pump cylinder body is caused.

Disclosure of Invention

The utility model aims at the above-mentioned problem that exists among the prior art, provide a plunger pump, solve the plunger chamber of clamping ring and pump cylinder body and connect and appear becoming flexible and cause seal assembly to have sealed not tight problem.

The purpose of the utility model can be realized by the following technical proposal: the plunger pump is characterized in that a flaring groove is formed in the cylinder body at the position of a cavity opening of the plunger cavity, a sealing assembly is arranged on the flaring groove of the cylinder body, the plunger penetrates through the sealing assembly and is enabled to form relative sliding seal with the cylinder body through the sealing assembly, and the cylinder body is provided with a limiting structure for preventing the sealing assembly from moving along with the reciprocating displacement of the plunger.

The plunger pump is mainly characterized in that the cylinder body is provided with a limiting structure, the sealing assembly is axially limited through the limiting structure, the axial movement of the sealing assembly is prevented, the sealing action of the sealing assembly between the plunger and the cylinder body can be ensured, the good sealing performance between the plunger and the cylinder body can be ensured, and the structure is stable; the provision of a crankshaft connecting rod mechanism within the crankcase, through which the plunger pump is powered for reciprocating displacement, is well known to those skilled in the art, as is conventional in plunger pumps.

In foretell plunger pump, limit structure include the clamping ring, the external diameter of clamping ring and the internal diameter adaptation in the flaring groove of cylinder body, the same axial of clamping ring assemble in the notch department in the flaring groove of cylinder body and this clamping ring and cylinder body between be provided with the fender position structure that prevents the clamping ring drunkenness in the flaring groove of cylinder body, set up seal assembly on the flaring groove of cylinder body with the clamping ring axial support by the cooperation. The purpose of this is to facilitate the axial assembly of the pressure ring in the flared groove of the cylinder, the axial play of the sealing assembly being defined by the axial abutment of the pressure ring and the sealing assembly.

In foretell plunger pump, fender position structure including having the fender position board of through hole, the fender position board set up between crankcase and cylinder body, the plunger pass in the through hole of fender position board and stretch into the plunger chamber of cylinder body, the hole of the through hole of fender position board along keeping off in the outer end of clamping ring. The stop plate is arranged at the notch of the flaring groove of the cylinder body and between the crankcase and the cylinder body, and the press ring is abutted against the stop plate, so that the axial movement of the press ring can be effectively prevented, and further the axial movement of the sealing assembly can be effectively prevented; this keep off the position board and pass through crankcase, cylinder body and when both connect relatively through the fastener and also wear to establish fixedly relatively to keeping off the position board, convenient assembling, stable in structure.

In an above-mentioned plunger pump, the terminal surface of the outer end of clamping ring on be provided with first seal groove, first seal groove in be equipped with first sealing washer and this first sealing washer act on between clamping ring, the fender position board. The purpose of setting up like this is to ensure the sealed validity between clamping ring, the fender position board through first sealing washer, and this clamping ring can also carry out axial elasticity through first sealing washer and fender position board and lean on and then form the flexibility and lean on, enables seal assembly axial position and can finely tune.

In an above-mentioned plunger pump, the outer wall of clamping ring on be provided with the second seal groove adjacent with first seal groove, the second seal groove in be equipped with the second sealing washer and this second sealing washer acts on between clamping ring, the cylinder body. The purpose of this setting can ensure the sealed validity between clamping ring, the cylinder body through the second sealing washer.

In foretell plunger pump, seal assembly including all being annular water seal seat, water seal, equal same axial of water seal seat, water seal assemble in the flaring groove of cylinder body, the water seal be located between water seal seat, the clamping ring and this water seal acts on between plunger, the cylinder body. The sealing effectiveness between the plunger and the cylinder body can be ensured by arranging the water seal.

In foretell plunger pump, the terminal surface of the one end of water seal be provided with first conical groove, the water seal seat on be provided with first toper arch, the protruding axial of first toper of water seal seat assemble in the first conical groove of the terminal surface of the one end of water seal, the terminal surface of the other end of water seal be provided with second toper arch, the terminal surface of the inner of clamping ring be provided with second conical groove, the protruding axial of second toper of the terminal surface of the other end of water seal assemble in the second conical groove of the terminal surface of the inner of clamping ring. The purpose of setting up like this can effectively inject the relative drunkenness of water seal, and structural design is comparatively stable.

Compared with the prior art, the plunger pump has the advantages that: the main position board that keeps off that sets up carries out the axial to the clamping ring through keeping off the position board and supports and lean on keeping off the position, can prevent effectively that the clamping ring from taking place the axis drunkenness, can ensure seal assembly's sealing performance, stable in structure, the leakproofness is good, long service life.

Drawings

Fig. 1 is a schematic perspective view of the present plunger pump.

Fig. 2 is a schematic sectional structure view of the present plunger pump.

Fig. 3 is an enlarged schematic view of a portion a in fig. 2.

Fig. 4 is a schematic perspective view of a compression ring in the plunger pump.

In the figure, 1, crankcase; 2. a cylinder body; 3. a crankshaft connecting rod mechanism; 4. a plunger; 5. pressing a ring; 6. a stop plate; 7. a first seal ring; 8. a second seal ring; 9. a water seal seat; 10. water sealing; 11. a first conical projection; 12. a second conical projection.

Detailed Description

The following are specific embodiments of the present invention and the accompanying drawings are used to further describe the technical solution of the present invention, but the present invention is not limited to these embodiments.

As shown in fig. 1, fig. 2, fig. 3 and fig. 4, the plunger pump mainly comprises a crankcase 1 and a cylinder body 2, a crankshaft connecting rod mechanism 3 is arranged in the crankcase 1, a plunger cavity and a plunger 4 slidably arranged in the plunger cavity are arranged on the cylinder body 2, a free end of a connecting rod in the crankshaft connecting rod mechanism 3 arranged in the crankcase 1 is connected with the plunger 4 and drives the plunger 4 to reciprocate in the plunger cavity to provide working pressure for the cylinder body 2, a flaring groove is arranged on the cylinder body 2 at the cavity opening of the plunger cavity, a sealing assembly is arranged on the flaring groove of the cylinder body 2, the plunger 4 penetrates through the sealing assembly and forms relative sliding seal with the cylinder body 2 through the sealing assembly, and a limit structure for preventing the sealing assembly from moving along with the reciprocating displacement of the plunger 4 is arranged on the cylinder body 2.

During actual manufacturing, the specific implementation mode of the limiting structure is as follows: the cylinder body 2 is characterized by mainly comprising a compression ring 5, wherein the outer diameter of the compression ring 5 is matched with the inner diameter of an expanding groove of the cylinder body 2, the compression ring 5 is axially assembled at the notch of the expanding groove of the cylinder body 2, a gear structure for preventing the compression ring 5 from moving in the expanding groove of the cylinder body 2 is arranged between the compression ring 5 and the cylinder body 2, and a sealing assembly arranged on the expanding groove of the cylinder body 2 is axially abutted and matched with the compression ring 5; specifically, the specific implementation mode of the gear structure is as follows: the oil cylinder mainly comprises a baffle plate 6 with a through hole, wherein the baffle plate 6 is arranged between a crankcase 1 and a cylinder body 2, a plunger 4 penetrates through the through hole of the baffle plate 6 and extends into a plunger cavity of the cylinder body 2, and the hole edge of the through hole of the baffle plate 6 is blocked at the outer end of a compression ring 5; a first sealing groove is formed in the end face of the outer end of the pressure ring 5, a first sealing ring 7 is assembled in the first sealing groove, and the first sealing ring 7 acts between the pressure ring 5 and the blocking plate 6; the outer wall of the pressure ring 5 is provided with a second sealing groove adjacent to the first sealing groove, a second sealing ring 8 is assembled in the second sealing groove, and the second sealing ring 8 acts between the pressure ring 5 and the cylinder body 2.

During actual manufacturing, the sealing assembly mainly comprises a water seal seat 9 and a water seal 10 which are annular, the water seal seat 9 and the water seal 10 are axially assembled in an expanding groove of the cylinder body 2, the water seal 10 is positioned between the water seal seat 9 and the pressing ring 5, and the water seal 10 acts between the plunger 4 and the cylinder body 2; specifically, a first conical groove is formed in the end face of one end of the water seal 10, a first conical protrusion 11 is arranged on the water seal seat 9, the first conical protrusion 11 of the water seal seat 9 is axially assembled in the first conical groove of the end face of one end of the water seal 10, a second conical protrusion 12 is arranged on the end face of the other end of the water seal 10, a second conical groove is formed in the end face of the inner end of the pressing ring 5, and the second conical protrusion 12 of the end face of the other end of the water seal 10 is axially assembled in the second conical groove of the end face of the inner end of the pressing ring 5.

Those not described in detail in this specification are well within the skill of the art. The specific embodiments described herein are merely illustrative of the spirit of the invention. Various modifications, additions and substitutions may be made by those skilled in the art to the specific embodiments described without departing from the spirit of the invention or exceeding the scope of the invention as defined in the accompanying claims.

Claims

1. The plunger pump comprises a crankcase (1) and a cylinder body (2), wherein a crankshaft connecting rod mechanism (3) is arranged in the crankcase (1), the cylinder body (2) is provided with a plunger cavity and a plunger (4) which is arranged in the plunger cavity in a sliding manner, the free end of a connecting rod in the crankshaft connecting rod mechanism (3) arranged in the crankcase (1) is connected with the plunger (4) and drives the plunger (4) to reciprocate in the plunger cavity to provide working pressure for the cylinder body (2), the plunger pump is characterized in that an opening expanding groove is formed in the cylinder body (2) at the position of a cavity opening of the plunger cavity, a sealing assembly is arranged on the opening expanding groove of the cylinder body (2), the plunger (4) penetrates through the sealing assembly and forms relative sliding seal with the cylinder body (2) through the sealing assembly, and a limiting structure for preventing the sealing assembly from jumping along with the reciprocating displacement of the plunger (4) is arranged on the cylinder body (2).

2. The plunger pump of claim 1, characterized in that, limit structure include clamping ring (5), the external diameter of clamping ring (5) and the internal diameter adaptation in the flaring groove of cylinder body (2), the same axial assembly of clamping ring (5) be provided with the fender position structure that prevents clamping ring (5) drunkenness in the flaring groove of cylinder body (2) and between this clamping ring (5) and cylinder body (2) in the notch department in the flaring groove of cylinder body (2), set up the seal assembly on the flaring groove of cylinder body (2) with clamping ring (5) axial support to lean on the cooperation.

3. The plunger pump according to claim 2, wherein the gear structure comprises a retaining plate (6) with a through hole, the retaining plate (6) is arranged between the crankcase (1) and the cylinder body (2), the plunger (4) penetrates through the through hole of the retaining plate (6) and extends into a plunger cavity of the cylinder body (2), and the hole edge of the through hole of the retaining plate (6) is retained at the outer end of the compression ring (5).

4. A plunger pump according to claim 3, characterized in that the end face of the outer end of the pressure ring (5) is provided with a first sealing groove, a first sealing ring (7) is arranged in the first sealing groove, and the first sealing ring (7) acts between the pressure ring (5) and the stopper plate (6).

5. The plunger pump according to claim 4, characterized in that a second sealing groove adjacent to the first sealing groove is arranged on the outer wall of the pressure ring (5), a second sealing ring (8) is assembled in the second sealing groove, and the second sealing ring (8) acts between the pressure ring (5) and the cylinder body (2).

6. The plunger pump according to claim 2, wherein the sealing assembly comprises a water seal seat (9) and a water seal (10) which are both annular, the water seal seat (9) and the water seal (10) are both axially assembled in a flaring groove of the cylinder body (2), the water seal (10) is positioned between the water seal seat (9) and the pressing ring (5), and the water seal (10) acts between the plunger (4) and the cylinder body (2).

7. The plunger pump according to claim 6, characterized in that, the terminal surface of the one end of water seal (10) be provided with first toper groove, water seal seat (9) on be provided with first toper arch (11), first toper arch (11) axial assembly of water seal seat (9) in the first toper groove of the terminal surface of the one end of water seal (10), the terminal surface of the other end of water seal (10) be provided with second toper arch (12), the terminal surface of the inner of clamping ring (5) be provided with second toper groove, second toper arch (12) axial assembly of the terminal surface of the other end of water seal (10) in the second toper groove of the terminal surface of the inner of clamping ring (5).