An ultrahigh pressure pump head assembly for a liquid driven plunger pump

Abstract

The utility model relates to a kind of superhigh pressure pump head assemblies for liquid-driven plunger pump, the superhigh pressure pump head assemblies for liquid-driven plunger pump, including pump body, installation passage is formed in pump body, multiple layers of cylinder sleeve are arranged in installation passage along radial direction, left end of multiple layers of cylinder sleeve is positioned by left connector connected with pump body, right end is positioned by right connector connected with pump body;Multiple layers of cylinder sleeve are outer cylinder sleeve, middle cylinder sleeve and inner cylinder sleeve connected by interference in turn, the inner diameter of the middle section of middle cylinder sleeve is less than the inner diameter of its two end sections, to form left clamping platform and right clamping platform at two ends of middle section respectively, the inner cylinder sleeve includes left cylinder sleeve clamped on left clamping platform and right cylinder sleeve clamped on right clamping platform, high-pressure V-shaped sealing assembly is arranged in the middle section of middle cylinder sleeve between left cylinder sleeve and right cylinder sleeve, left cylinder sleeve, right cylinder sleeve and high-pressure V-shaped sealing assembly form cavity for plunger rod to extend and retract together.The superhigh pressure pump head assemblies for liquid-driven plunger pump has the advantages of convenient installation, low cost, high pressure resistance, good sealing effect, etc.

Description

Technical Field

[0001] This utility model relates to the field of liquid-driven plunger pumps, and in particular to an ultra-high pressure pump head assembly for liquid-driven plunger pumps. Background Technology

[0002] A hydraulically driven plunger pump is a type of reciprocating plunger pump that pressurizes a liquid medium by performing work on it through the reciprocating motion of the plunger. High-pressure discharge requires the pump head to have a reliable structure capable of withstanding high pressure, and to achieve reliable sealing and lubrication. Existing pump head assemblies consist of a pump body with a cylinder liner inside for the plunger rod to move. Sealing is achieved by fitting a standard sealing ring onto the plunger rod. Flanges at both ends of the pump body are used for positioning or connecting other structures. Using a single cylinder liner presents several problems: firstly, it is relatively bulky and difficult to install; secondly, the material cost is high, but the strength is relatively low. Using flanges, on the other hand, makes disassembly and maintenance cumbersome. Ordinary sealing rings cannot withstand high pressure, resulting in poor sealing performance. Utility Model Content

[0003] To overcome the shortcomings of the prior art, this utility model provides an ultra-high pressure pump head assembly for a liquid-driven plunger pump, which can be applied to liquid-driven plunger pumps with high pressure output, high reliability, and high-precision metering requirements.

[0004] The technical solution adopted by this utility model to solve the above-mentioned technical problems is as follows:

[0005] An ultra-high pressure pump head assembly for a liquid-driven plunger pump includes a pump body, in which an installation channel is formed. Multiple cylinder liners are arranged radially within the installation channel. The left end of each cylinder liner is positioned by a left connector connected to the pump body, and the right end is positioned by a right connector connected to the pump body.

[0006] The multi-layer cylinder liner consists of an outer cylinder liner, a middle cylinder liner, and an inner cylinder liner connected by an interference fit. The inner diameter of the middle section of the middle cylinder liner is smaller than the inner diameter of its two end sections, so that a left retaining plate and a right retaining plate are formed at the two ends of the middle section, respectively. The inner cylinder liner includes a left cylinder liner that is engaged with the left retaining plate and a right cylinder liner that is engaged with the right retaining plate. A high-pressure V-shaped sealing assembly is provided between the left cylinder liner and the right cylinder liner in the middle section of the middle cylinder liner. The left cylinder liner, the right cylinder liner, and the high-pressure V-shaped sealing assembly together form a cavity for the extension and retraction of the plunger rod.

[0007] Preferably, the right connector includes a first threaded sleeve threaded into the installation channel, a second threaded sleeve connected inside the first threaded sleeve, the ends of the outer cylinder sleeve and the middle cylinder sleeve abutting against the first threaded sleeve, and the end of the right cylinder sleeve abutting against the second threaded sleeve.

[0008] Preferably, the top of the first threaded sleeve is provided with a locking groove.

[0009] Preferably, the left connector consists of a nozzle and a flange that positions the nozzle in the mounting channel.

[0010] Preferably, the nozzle connection port has an abutting plane and an abutting cone surface distributed outwards in sequence, the end side of the inner cylinder liner abuts on the abutting plane, and the end of the middle cylinder liner is provided with a sharp edge that abuts on the abutting cone surface.

[0011] Preferably, the high-pressure V-shaped sealing assembly includes a support ring, a multi-layer V-shaped sealing ring, and a pressure ring, wherein the V-groove of the V-shaped sealing ring is oriented towards the left connector.

[0012] The advantages of this utility model, employing the above-mentioned technical solution, are as follows: The ultra-high pressure pump head assembly for the hydraulic plunger pump, through multiple cylinder liner interference fits and interference fit with the pump body, not only withstands high pressure (multi-layer interference fits can offset some pressure), but also features lightweight and easy-to-install structures with low production costs; the high-pressure V-type sealing assembly, in conjunction with the intermediate cylinder liner and inner cylinder liner, achieves both static sealing with the intermediate cylinder liner and dynamic sealing with the plunger rod, resulting in a good sealing effect, high sealing strength, and the ability to withstand high pressure, while also ensuring high metering accuracy; the simplified right connector structure facilitates disassembly and maintenance while maintaining good structural strength. This high-pressure pump head assembly is applicable to hydraulic plunger pumps requiring high pressure output, high reliability, and high-precision metering. Attached Figure Description

[0013] Figure 1 This is a circumferential sectional view of one embodiment of the present invention.

[0014] In the diagram, 1. Pump body, 2. Left connector, 3. Right connector, 4. Outer cylinder liner, 5. Middle cylinder liner, 6. Inner cylinder liner, 7. High-pressure V-type seal assembly, 8. Nozzle, 9. Flange, 10. Piston rod, 11. Large round nut, 12. Connecting sleeve; 31. First threaded sleeve, 32. Second threaded sleeve, 33. Locking groove, 61. Left cylinder liner, 62. Right cylinder liner. Detailed Implementation

[0015] To clearly illustrate the technical features of this solution, the present invention will be described in detail below through specific embodiments and in conjunction with the accompanying drawings. Many specific details are set forth in the following description to provide a thorough understanding of this application; however, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.

[0016] like Figure 1As shown, in this embodiment, the ultra-high pressure pump head assembly for the liquid-driven plunger pump includes a pump body 1. An installation channel is formed inside the pump body 1. Multiple cylinder liners are arranged radially inside the installation channel. The left end of the multiple cylinder liners is positioned by a left connector 2 connected to the pump body 1, and the right end is positioned by a right connector 3 connected to the pump body 1. The multiple cylinder liners are an outer cylinder 4, a middle cylinder 5, and an inner cylinder 6 that are sequentially interference-fitted. The inner diameter of the middle section of the middle cylinder 5 is smaller than the inner diameter of its two end sections, so that a left retaining plate and a right retaining plate are formed at the two ends of the middle section, respectively. The inner cylinder 6 includes a left cylinder 61 that is engaged with the left retaining plate and a right cylinder 62 that is engaged with the right retaining plate. A high-pressure V-shaped sealing assembly 7 is provided between the left cylinder 61 and the right cylinder 62 in the middle section of the middle cylinder 5. The left cylinder 61, the right cylinder 62, and the high-pressure V-shaped sealing assembly 7 together form a cavity for the extension and retraction of the plunger rod 10.

[0017] In one specific embodiment, to facilitate disassembly and assembly, the original flange connection structure is modified to the following structure: Specifically, the right connector 3 includes a first threaded sleeve 31 threadedly connected to the installation channel, a second threaded sleeve 32 connected inside the first threaded sleeve 31, the ends of the outer cylinder sleeve 4 and the middle cylinder sleeve 5 abutting against the first threaded sleeve 31, and the end of the right cylinder sleeve 62 abutting against the second threaded sleeve 32.

[0018] In one specific embodiment, the top of the first threaded sleeve 31 is provided with a locking groove 33, which facilitates tightening and loosening of the first threaded sleeve by means of a socket wrench.

[0019] In one specific embodiment, the pump body 1 corresponding to the right connector 3 is also cut with a connecting part. The connecting part is limited to the connecting sleeve 12 on the pump body by a large round nut 11 that is threaded to it. The connecting sleeve is threaded to facilitate connection with other structures.

[0020] In one specific embodiment, the left connector 2 consists of a nozzle 8 and a flange 9 that positions the nozzle in the mounting channel.

[0021] In one specific embodiment, the high-pressure V-shaped sealing assembly 7 includes a support ring, multiple V-shaped sealing rings, and a pressure ring. Since this structure is existing technology, it will not be described in detail here. To achieve a better sealing and pressurization effect, the V-groove of the V-shaped sealing ring is positioned with its V-groove facing the left connector during installation.

[0022] In one specific embodiment, the nozzle 8 has an outwardly distributed contact surface and contact cone surface at its connection port. The end side of the inner cylinder liner 6 rests on the contact surface, and the end of the middle cylinder liner 5 is provided with a sharp edge that rests on the contact cone surface. This design can achieve high-pressure sealing.

[0023] In one specific embodiment, the pump body 1 is also provided with a cooling water circulation system and an oil lubrication system as needed, for cooling and structural lubrication, respectively. Both systems are existing technologies and will not be described in detail here.

[0024] Working principle:

[0025] Before the equipment starts running, the external cooling water circulation system and the oil lubrication system are started first. Then, the plunger rod 10 starts to reciprocate, compressing the liquid medium entering from the nozzle. The compressed liquid medium is then pressurized and output again through the high-pressure nozzle 8. After the external container is filled with liquid medium, the high-pressure pump head assembly will output a quantitative amount of liquid medium per unit time according to the designed working stroke at a fixed reciprocating frequency.

[0026] The above specific embodiments should not be construed as limiting the scope of protection of this utility model. For those skilled in the art, any alternative improvements or modifications made to the embodiments of this utility model shall fall within the scope of protection of this utility model.

[0027] Any aspects of this utility model not described in detail are known to those skilled in the art.

Claims

1. An ultra-high pressure pump head assembly for a hydraulically driven plunger pump, characterized in that, Includes a pump body, in which an installation channel is formed, and multiple cylinder liners are arranged radially within the installation channel. The left end of each multiple cylinder liner is positioned by a left connector connected to the pump body, and the right end is positioned by a right connector connected to the pump body. The multi-layer cylinder liner consists of an outer cylinder liner, a middle cylinder liner, and an inner cylinder liner connected by an interference fit. The inner diameter of the middle section of the middle cylinder liner is smaller than the inner diameter of its two end sections, so that a left retaining plate and a right retaining plate are formed at the two ends of the middle section, respectively. The inner cylinder liner includes a left cylinder liner that is engaged with the left retaining plate and a right cylinder liner that is engaged with the right retaining plate. A high-pressure V-shaped sealing assembly is provided between the left cylinder liner and the right cylinder liner in the middle section of the middle cylinder liner. The left cylinder liner, the right cylinder liner, and the high-pressure V-shaped sealing assembly together form a cavity for the extension and retraction of the plunger rod.

2. The ultra-high pressure pump head assembly for a hydraulically driven plunger pump according to claim 1, characterized in that, The right connector includes a first threaded sleeve threaded into the installation channel, a second threaded sleeve connected inside the first threaded sleeve, the ends of the outer cylinder sleeve and the middle cylinder sleeve abutting against the first threaded sleeve, and the end of the right cylinder sleeve abutting against the second threaded sleeve.

3. The ultra-high pressure pump head assembly for a hydraulically driven plunger pump according to claim 1, characterized in that, The top of the first threaded sleeve is provided with a locking groove.

4. The ultra-high pressure pump head assembly for a hydraulically driven plunger pump according to claim 1, characterized in that, The left connector consists of a nozzle and a flange that positions the nozzle in the mounting channel.

5. The ultra-high pressure pump head assembly for a hydraulically driven plunger pump according to claim 4, characterized in that, The nozzle connection port has an abutting plane and an abutting cone surface distributed outwards in sequence. The end side of the inner cylinder liner rests on the abutting plane, and the end of the middle cylinder liner is provided with a sharp edge that rests on the abutting cone surface.

6. The ultra-high pressure pump head assembly for a hydraulically driven plunger pump according to claim 4, characterized in that, The high-pressure V-shaped sealing assembly includes a support ring, multiple V-shaped sealing rings, and a pressure ring, wherein the V-groove of the V-shaped sealing ring is oriented towards the left connector.

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