CN209892437U

CN209892437U - Plunger mounting structure of plunger pump

Info

Publication number: CN209892437U
Application number: CN201920237457.2U
Authority: CN
Inventors: 戴主锋; 王吉龙
Original assignee: Zhejiang Ningwei Machinery Technology Co Ltd
Current assignee: Zhejiang Ningwei Machinery Technology Co Ltd
Priority date: 2019-02-25
Filing date: 2019-02-25
Publication date: 2020-01-03
Anticipated expiration: 2029-02-25

Abstract

The utility model relates to a plunger pump technical field discloses a plunger mounting structure of plunger pump, including the cylinder body that has inlet channel and liquid outlet channel, the overcoat, set up the inner core in the overcoat, the cylinder body is provided with the intercommunicating pore, set up threaded hole on the cylinder body, the week side of overcoat is provided with the screw thread end of threaded connection in the screw thread hole, an organic whole is provided with the holding ring on the terminal surface that the overcoat is close to the screw thread end, the terminal surface conflict that the overcoat is close to the screw thread end is in the bottom surface of screw hole, the internal diameter that holding ring and overcoat set up with one heart and holding ring is the same with the internal diameter of overcoat. The utility model has the advantages of it is following and effect: when making the screw thread end threaded connection of overcoat in the threaded hole, the terminal surface that the overcoat is close to the screw thread end contradicts the axial positioning to the overcoat at the bottom of screw hole, and the week side outer wall of holding ring is contradicted and is fixed a position week side of overcoat on the inner wall of intercommunicating pore to can improve the installation stability of overcoat.

Description

Plunger mounting structure of plunger pump

Technical Field

The utility model relates to a plunger pump technical field, in particular to plunger mounting structure of plunger pump.

Background

The plunger pump realizes liquid suction and liquid pressing by changing the volume of the sealed working cavity through the reciprocating motion of the plunger in the cylinder body; the device has the advantages of high rated pressure, compact structure, high efficiency, convenient flow regulation and the like. The plunger pump mainly comprises a cylinder body, an eccentric wheel, a plunger and a spring.

In the prior art, the cylinder body and the plunger are installed in a matched manner as shown in fig. 3, the cylinder body 1 is provided with a liquid inlet channel 11 and a liquid outlet channel 12, two one-way valves are respectively installed in the liquid inlet channel 11 and the liquid outlet channel 12 to prevent liquid from flowing backwards, a communication hole 13 communicated with the liquid inlet channel 11 and the liquid outlet channel 12 is formed in the cylinder body 1, and a threaded hole 14 communicated with the communication hole 13 is formed in the cylinder body 1. The plunger comprises an outer sleeve 2 and an inner core 3 which is telescopically arranged in the outer sleeve 2. The threaded hole 14 is internally threaded with the outer sleeve 2, the threaded end 21 on the outer sleeve 2 is longer than the threaded hole 14, and the inner core 3 can be telescopically arranged in the outer sleeve under the action of the eccentric wheel and the spring.

The bottom surface of the outer sleeve 2 props against the bottom surface of the threaded hole 14 to realize end surface contact; but the lower extreme of overcoat 2 passes through threaded end 21 threaded connection in screw hole 14, exists the clearance because of screw-thread fit this moment, and overcoat 2 uses threaded end 21 to take place to beat when the external diameter contacts, leads to overcoat 2 installation nonparallel to lead to inner core 3 eccentric wear, lead to inner core 3 to pull to split, influence life-span's problem then.

SUMMERY OF THE UTILITY MODEL

The utility model aims at providing a plunger mounting structure of plunger pump can improve the reciprocal flexible stability of inner core in the cover.

The above technical purpose of the present invention can be achieved by the following technical solutions: the utility model provides a plunger mounting structure of plunger pump, includes cylinder body, overcoat, the inner core of setting in the overcoat that has inlet channel and liquid outlet channel, the cylinder body be provided with inlet channel and the communicating intercommunicating pore of liquid outlet channel, set up on the cylinder body with the communicating screw hole of intercommunicating pore, week side of overcoat is provided with the screw thread end of threaded connection in the screw thread hole, an organic whole is provided with the holding ring on the terminal surface that the overcoat is close to the screw thread end, the terminal surface conflict that the overcoat is close to the screw thread end is in the bottom surface of screw hole, the holding ring is the same with the internal diameter of overcoat with the concentric setting of overcoat and holding ring, week side outer wall.

The utility model discloses a further set up to: the junction of the communicating hole and the threaded hole is provided with a first chamfer, and the edge of the end face, far away from the outer sleeve, of the positioning ring is provided with a second chamfer.

The utility model discloses a further set up to: the inner wall of the threaded hole close to one end of the communicating hole is provided with an annular groove, the inner diameter of the annular groove is larger than the aperture of the threaded hole, and the inner part of the thread of the threaded end located in the annular groove is not in contact with the inner wall of the annular groove.

The utility model discloses a further set up to: the wall thickness of the positioning ring is half of that of the outer sleeve.

To sum up, the utility model discloses following beneficial effect has:

1. when the threaded end of the outer sleeve is in threaded connection with the threaded hole, the end face of the outer sleeve, which is close to the threaded end, abuts against the bottom of the threaded hole to axially position the outer sleeve, and the peripheral outer wall of the positioning ring abuts against the inner wall of the communication hole to position the peripheral side of the outer sleeve, so that the mounting stability of the outer sleeve can be improved, and the stability of the inner core in reciprocating expansion in the outer sleeve is finally improved;

2. the first chamfer is arranged at the junction of the communicating hole and the threaded hole, and the edge of the end face, far away from the outer sleeve, of the positioning ring is provided with the second chamfer, so that the guiding can be realized through the first chamfer and the second chamfer in the process that the positioning ring is embedded into the communicating hole;

3. set up and this screw hole does not link up because of the inside of screw hole orientation cylinder body, when processing the screw hole this moment, the screw thread machining precision of screw hole bottom is relatively poor, lead to the unable screw thread that screws up with the screw hole bottom of screw thread end to cooperate easily, thereby can't make the terminal surface that the overcoat is close to the screw thread end inconsistent with the ground of screw hole, thereby set up the annular on the screw hole is close to even inner wall that links through-hole one end, thereby conveniently set up complete screw thread on the inner wall of screw hole, make things convenient for the screw thread end to carry out threaded connection.

Drawings

Fig. 1 is a schematic structural diagram of the present invention;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

fig. 3 is a schematic diagram of a prior art structure.

Reference numerals: 1. a cylinder body; 11. a liquid inlet channel; 12. a liquid outlet channel; 13. a communicating hole; 14. a threaded hole; 15. a ring groove; 2. a jacket; 21. a threaded end; 22. a positioning ring; 3. an inner core; 41. a first chamfer; 42. and (7) second chamfering.

Detailed Description

The present invention will be described in further detail with reference to the accompanying drawings.

Example 1: a plunger mounting structure of a plunger pump is shown in figure 1 and comprises a cylinder body 1 with a liquid inlet channel 11 and a liquid outlet channel 12, an outer sleeve 2 and an inner core 3 arranged in the outer sleeve 2. The cylinder body 1 is provided with a communicating hole 13 communicating the liquid inlet channel 11 and the liquid outlet channel 12, the cylinder body 1 is provided with a threaded hole 14 communicated with the communicating hole 13, the peripheral side of the inner core 3 is provided with a threaded end 21 in threaded connection with the threaded hole 14, and the length of the threaded end 21 is larger than the depth of the threaded hole 14. The inner core 3 is made of ceramic material.

As shown in fig. 1 and 2, a positioning ring 22 is integrally provided on the end surface of the outer jacket 2 near the threaded end 21. The positioning ring 22 and the outer sleeve 2 are concentrically arranged, the inner diameter of the positioning ring 22 is the same as that of the outer sleeve 2, the peripheral outer wall of the positioning ring 22 abuts against the inner wall of the communication hole 13, and the wall thickness of the positioning ring 22 is half of that of the outer sleeve 2.

As shown in fig. 1 and 2, the end surface of the outer sleeve 2 close to the threaded end 21 abuts against the bottom surface of the threaded hole 14, an annular groove 15 is formed in the inner wall of the threaded hole 14 close to one end of the communicating hole 13, the inner diameter of the annular groove 15 is larger than the aperture of the threaded hole 14, and the threads of the part, located in the annular groove 15, of the threaded end 21 are not in contact with the inner wall of the annular groove 15.

As shown in fig. 1 and 2, a first chamfer 41 is provided at the boundary of the communication hole 13 and the threaded hole 14, and a second chamfer 42 is provided at the edge of the end face of the positioning ring 22 far from the outer sleeve 2.

The implementation principle is as follows: when the threaded end 21 of the outer sleeve 2 is in threaded connection with the threaded hole 14, the end face of the outer sleeve 2 close to the threaded end 21 abuts against the bottom surface of the threaded hole 14 to axially position the outer sleeve 2, and the peripheral outer wall of the positioning ring 22 abuts against the inner wall of the communication hole 13 to position the peripheral side of the outer sleeve 2, so that the mounting stability of the outer sleeve 2 can be improved, and the stability of the inner core 3 in reciprocating expansion and contraction in the outer sleeve 2 is finally improved; by arranging the first chamfer 41 at the boundary of the communication hole 13 and the threaded hole 14, the edge of the end surface of the positioning ring 22 far away from the outer sleeve 2 is provided with the second chamfer 42, so that the guiding can be realized by the first chamfer 41 and the second chamfer 42 when the positioning ring 22 is embedded into the communication hole 13; because of threaded hole 14 is seted up towards the inside of cylinder body 1 and this threaded hole 14 does not link up, this moment when processing threaded hole 14, the thread machining precision of threaded hole 14 bottom is relatively poor, lead to the unable screw-thread cooperation with threaded hole 14 bottom of screwing up of threaded end 21 easily, thereby can't make overcoat 2 be close to the terminal surface of threaded end 21 inconsistent with threaded hole 14 ground, thereby set up annular 15 on threaded hole 14 is close to the inner wall that links through-hole 13 one end, thereby conveniently set up complete screw thread on threaded hole 14's inner wall, make things convenient for threaded end 21 to carry out threaded connection.

The present embodiment is only for explaining the present invention, and it is not limited to the present invention, and those skilled in the art can make modifications to the present embodiment without inventive contribution as required after reading the present specification, but all of them are protected by patent laws within the scope of the claims of the present invention.

Claims

1. The utility model provides a plunger mounting structure of plunger pump, includes cylinder body (1), overcoat (2) that have inlet channel (11) and liquid outlet channel (12), sets up inner core (3) in overcoat (2), cylinder body (1) is provided with and communicates with each other intercommunicating pore (13) with inlet channel (11) and liquid outlet channel (12), set up on cylinder body (1) with communicating pore (13) communicating screw hole (14), the week side of overcoat (2) is provided with threaded connection screw thread end (21) in screw hole (14), its characterized in that: the utility model discloses a threaded end (21) of connecting, including overcoat (2), threaded end (21), holding ring (22), the terminal surface that overcoat (2) is close to threaded end (21) is contradicted in the bottom surface of screw hole (14), the internal diameter that holds ring (22) and overcoat (2) set up with one heart and holding ring (22) is the same with the internal diameter of overcoat (2), the all sides outer wall of holding ring (22) is contradicted on the inner wall of intercommunicating pore (13).

2. The plunger mounting structure of a plunger pump according to claim 1, wherein: the joint of the communicating hole (13) and the threaded hole (14) is provided with a first chamfer (41), and the edge of the end face, far away from the outer sleeve (2), of the positioning ring (22) is provided with a second chamfer (42).

3. The plunger mounting structure of a plunger pump according to claim 1, wherein: be provided with annular (15) on the inner wall that screw hole (14) are close to intercommunicating pore (13) one end, the internal diameter of annular (15) is greater than the aperture of screw hole (14), screw thread end (21) are located the internal portion of annular (15) the screw thread not contact with the inner wall of annular (15).

4. The plunger mounting structure of a plunger pump according to claim 1, wherein: the wall thickness of the positioning ring (22) is half of that of the outer sleeve (2).