A plunger pump

Abstract

The application discloses a plunger pump, which comprises a cylinder sleeve, a partition layer fixedly connected in the cylinder sleeve, a discharging connector, a one-way valve seat and a screw plug; the partition layer divides the cylinder sleeve into an upper cavity and a lower cavity; the discharging connector is communicated with the upper cavity; and the one-way valve seat is detachably connected with the discharging connector and the screw plug respectively. The plunger pump has the advantages that the one-way valve is arranged on one end of the cylinder sleeve connected with the cylinder body, so that the plunger pump can realize the working process through only one set of sealing rings, the consumption and replacement frequency of the sealing rings are reduced, and the working efficiency of the plunger pump is improved.

Description

Technical Field

[0001] This invention relates to the field of coating technology, and in particular to a plunger pump. Background Technology

[0002] A paint sprayer is a specialized coating equipment using spraying technology. The plunger pump is a crucial component in the operation of the paint sprayer. The paint sprayer uses the reciprocating motion of the plunger pump to deliver paint into a high-pressure pipe, which is then sprayed onto the wall using a spray gun. The sealing ring assembly within the plunger pump is a critical component, and it is a part that is extremely prone to wear.

[0003] Traditional spray painting machines mostly use a plunger pump with two sets of sealing rings. The plunger pump outlet is located between the two sealing ring assemblies. During operation, the plunger pump generates high pressure and reciprocating motion, which can easily cause wear on the internal sealing rings, reducing their service life and requiring frequent replacement. Summary of the Invention

[0004] The technical problem to be solved by the present invention is to provide a plunger pump that adopts a one-way valve structure to reduce the number of sealing ring sets and reduce the number of sealing ring replacements.

[0005] To solve the above-mentioned technical problems, the technical solution of the present invention is as follows:

[0006] A plunger pump includes a cylinder liner, and further includes a partition layer, a discharge connector, a one-way valve seat, and a screw plug fixedly connected within the cylinder liner; the partition layer divides the cylinder liner into an upper cavity and a lower cavity; the discharge connector communicates with the upper cavity; the one-way valve seat is detachably connected to the discharge connector and the screw plug respectively.

[0007] Furthermore, the partition layer has through holes.

[0008] Furthermore, a connecting hole is provided on the upper cavity; the connecting hole is threadedly connected to the discharge connector.

[0009] Furthermore, it also includes a plunger rod and an upper cylinder block; the lower end of the plunger rod is detachably fitted with an upper sealing ring assembly; the upper end of the upper cylinder block is threadedly connected to an upper cylinder block cover, the lower end is threadedly connected to the upper end of the cylinder liner, and the circumferential side is threadedly connected with fixing screws.

[0010] Furthermore, the plunger rod is installed inside the upper cylinder body via an insertion method.

[0011] Furthermore, the upper cylinder cover has several grooves.

[0012] Furthermore, there are four grooves, symmetrically distributed on the upper cylinder cover.

[0013] Furthermore, it also includes a lower cylinder body; the upper end of the lower cylinder body is threadedly connected to the lower end of the cylinder liner; a valve seat is provided inside the lower cylinder body to install a valve ball I, and a ball cage is fixedly connected to the upper end.

[0014] Furthermore, the lower cylinder block and the cylinder liner are sealed by a lower cylinder block sealing gasket.

[0015] By adopting the above technical solution, a connection hole is opened above the partition layer of the bushing, and the connection hole connects to a one-way valve structure. This allows the plunger pump to operate using only one set of sealing rings, reducing the consumption and replacement frequency of sealing rings and improving the working efficiency of the plunger pump. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the upward structure of a plunger pump;

[0017] Figure 2 This is a schematic diagram of the downward structure of a plunger pump;

[0018] Figure 3 Top view of the piston pump cylinder head;

[0019] Figure 4 This is a sectional view of the piston pump cylinder liner.

[0020] In the diagram, 1-plunger rod, 2-upper cylinder head, 3-upper cylinder body, 4-cylinder liner, 5-upper sealing ring assembly, 6-lower cylinder body sealing gasket, 7-ball cage, 8-valve ball I, 9-lower cylinder body, 10-discharge connector, 11-one-way valve seat, 12-valve ball II, 13-spring, 14-screw plug, 15-fixing screw, 201-groove, 401-partition layer, 402-through hole, 403-connecting hole, 404-upper cavity, 405-lower cavity. Detailed Implementation

[0021] The specific embodiments of the present invention will be further described below with reference to the accompanying drawings. It should be noted that these descriptions are for the purpose of aiding understanding the present invention, but do not constitute a limitation thereof. Furthermore, the technical features involved in the various embodiments of the present invention described below can be combined with each other as long as they do not conflict with each other.

[0022] like Figure 1-4 As shown, a plunger pump includes a cylinder liner 4, and further includes a partition layer 401, a discharge connector 10, a one-way valve seat 11, and a screw plug 14 fixedly connected within the cylinder liner 4; the partition layer 401 divides the cylinder liner 4 into an upper cavity 404 and a lower cavity 405; the discharge connector 10 communicates with the upper cavity 404; the one-way valve seat 11 is detachably connected to the discharge connector 10 and the screw plug 14 respectively.

[0023] A through hole 402 is provided on the partition layer 401.

[0024] The upper cavity 404 has a connecting hole 403; the connecting hole 403 is threadedly connected to the discharge connector 10. The position of the connecting hole 403 facilitates the single input and output of the coating.

[0025] As another embodiment, it also includes a plunger rod 1 and an upper cylinder body 3; the lower end of the plunger rod 1 is detachably fitted with an upper sealing ring assembly 5; the upper end of the upper cylinder body 3 is threadedly connected to an upper cylinder body cover 2, the lower end is threadedly connected to the upper end of the cylinder liner 4, and a fixing screw 15 is threadedly connected to the circumferential side.

[0026] The plunger rod 1 is installed inside the upper cylinder 3 via an insertion method. This insertion method facilitates the reciprocating motion of the plunger pump.

[0027] The upper cylinder cover 2 has several grooves 201. The grooves 201 facilitate opening the upper cylinder cover 2 when replacing the sealing gasket assembly 5.

[0028] There are four grooves 201, which are symmetrically distributed on the upper cylinder cover 2.

[0029] As another embodiment, it also includes a lower cylinder body 9; the upper end of the lower cylinder body 9 is threadedly connected to the lower end of the cylinder liner 4; a valve seat is provided inside the lower cylinder body 9 to install a valve ball I8, and a ball cage 7 is fixedly connected to the upper end. The ball cage 7 helps to stabilize the ball valve I8 inside the valve seat, so that the ball valve I8 only moves within the restricted area during the movement of the plunger pump.

[0030] The lower cylinder block 9 and the cylinder liner 4 are sealed by the lower cylinder block sealing gasket 6. The lower cylinder block sealing gasket 6 is installed to prevent paint from seeping out from the gaps.

[0031] The working principle of this invention is as follows:

[0032] When the plunger pump starts working, the cylinder drives the plunger rod 1 to move up and down reciprocally. When the plunger rod 1 moves upward, a cavity is formed between the upper cylinder body 3 and the cylinder liner 4. The internal suction generated by the upward movement causes valve ball 8 to be in the open state, while valve ball 12 is in the closed state under the action of spring 13. The paint enters through the lower cylinder body 9 and is sucked into the cavity formed by the upper cylinder body 3 and the cylinder liner 4 through the ball cage 7. Then the plunger rod 1 moves downward. At this time, the volume of the cavity formed by the upper cylinder body 3 and the cylinder liner 4 decreases, generating external pressure. Under the action of external pressure, valve ball 8 moves down and is in the closed state. Spring 13 is compressed under the pressure, and valve ball 12 is in the open state under the action of external pressure. The paint in the cavity is sent to the next working process through the through hole in the middle of the discharge connector 10, the one-way valve seat 11, and the screw plug 14. The plunger pump then enters the next working process.

[0033] During the operation of the plunger pump, the paint can be delivered to the next working stage through a single suction and discharge, which increases the working efficiency of the plunger pump; the use of a single set of sealing rings reduces the running time of the plunger pump, and at the same time, the two sets of sealing rings of the traditional plunger pump are reduced to one set of sealing rings, avoiding the number of times the sealing rings need to be replaced and reducing the replacement frequency.

[0034] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings, but the present invention is not limited to the described embodiments. For those skilled in the art, various changes, modifications, substitutions, and variations can be made to these embodiments without departing from the principles and spirit of the present invention, and these variations still fall within the protection scope of the present invention.

Claims

1. A plunger pump, comprising a cylinder liner (4), a plunger rod (1), an upper cylinder body (3), and a lower cylinder body (9), characterized in that: A partition layer (401) is fixedly connected inside the cylinder liner (4), dividing the cylinder liner (4) into an upper cavity (404) and a lower cavity (405). A through hole (402) is provided on the partition layer (401) to connect the upper cavity (404) and the lower cavity (405). A connecting hole (403) is provided above the partition layer (401) in the upper cavity (404), and the connecting hole (403) is threadedly connected to the discharge connector (10). The discharge connector (10) is connected to a one-way... The valve seat (11) is detachably connected, and the one-way valve seat (11) is detachably connected to the screw plug (14). The one-way valve seat (11) is provided with a valve ball II (12) and a spring (13). The valve ball II (12) is located between the discharge connector (10) and the spring (13). The spring (13) is located between the valve ball II (12) and the screw plug (14). The screw plug (14) has a central through hole. The lower end of the plunger rod (1) is detachably equipped with an upper sealing ring assembly (5). The plunger pump is only equipped with one set. The upper sealing ring assembly (5); the upper cylinder body (3) is threadedly connected to the upper cylinder body cover (2) at the upper end, and threadedly connected to the upper end of the cylinder sleeve (4) at the lower end, and a fixing screw (15) is threadedly connected to the circumferential side; the plunger rod (1) is inserted into the interior of the upper cylinder body (3); the upper end of the lower cylinder body (9) is threadedly connected to the lower end of the cylinder sleeve (4), and a valve ball I (8) is installed on the valve seat inside the lower cylinder body (9), and a ball cage (7) is fixedly connected to the upper end; a lower cylinder body sealing gasket (6) is provided between the lower cylinder body (9) and the cylinder sleeve (4); When the plunger rod (1) moves upward, the valve ball I (8) opens and the valve ball II (12) closes under the action of the spring (13); when the plunger rod (1) moves downward, the valve ball I (8) closes and the valve ball II (12) opens under the pressure in the upper cavity (404) by compressing the spring (13), so that the coating in the upper cavity (404) is discharged sequentially through the connecting hole (403), the discharge connector (10), the one-way valve seat (11) and the middle through hole of the screw plug (14).

2. A plunger pump according to claim 1, characterized in that: The upper cylinder cover (2) has several grooves (201).

3. A plunger pump according to claim 2, characterized in that: There are four grooves (201) symmetrically distributed on the upper cylinder cover (2).

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