A modular cylinder liner assembly for quick-change piston pumps

Abstract

This utility model discloses a quick-change modular cylinder liner assembly for a plunger pump, including a cylinder body with an end cap at one end. A quick-change cylinder liner mechanism is located inside the cylinder body, and a sealing mechanism is provided between the end cap and the cylinder body. The quick-change cylinder liner mechanism includes a cylinder liner and two guide grooves, which are located on the inner wall of the cylinder body. A sealing plate is fixedly connected to the end of the cylinder liner, and a first sealing ring is provided on one side of the sealing plate. This invention belongs to the technical field of plunger pump accessories. This quick-change modular cylinder liner assembly allows for rapid cylinder liner replacement by inserting the cylinder liner into the cylinder body, inserting a clamping bolt with an elastic washer into a positioning rod, and then tightening the clamping bolt with a wrench. The clamping bolt moves a clamping block, pushing the cylinder liner further into the cylinder body and tightening the first sealing ring for sealing. This eliminates the need for forceful insertion and removal, effectively improving the convenience of replacement.

Description

Technical Field

[0001] This utility model relates to the technical field of plunger pump accessories, specifically a modular cylinder liner assembly for a quick-replaceable plunger pump. Background Technology

[0002] The piston pump is the core power component of the hydraulic system. It converts mechanical energy into hydraulic energy through the reciprocating motion of the piston in the cylinder. It has the characteristics of high pressure, high precision and long service life. In the existing technology, the piston pump drives the piston to move inside the cylinder liner through the crankshaft. The cylinder liner is pressed into the cylinder body. Disassembly and installation are relatively time-consuming and laborious, making the convenience of replacement less than ideal.

[0003] For example, patent publication number CN214998163U specifically describes a plunger pump for a cleaning machine, including a cylinder body. A first outer shell is located on the front of the cylinder body, and a second outer shell is located on the front of the first outer shell. One-way valves are symmetrically arranged between the second and first outer shells. A cylinder liner is slidably fitted into the inner cavity of the cylinder body, with an interference fit. A plunger body is located within the inner cavity of the cylinder body, and the outer wall of the plunger body slidably fits into the inner cavity of the cylinder liner. A positioning device is located within the inner cavity of the cylinder body, including two limiting rings. The cylinder body has a recessed... The groove, in which the outer wall of the limiting ring slides into the inner cavity of the groove, utilizes the cylinder liner's setting method. The cylinder liner slides into the inner cavity of the cylinder body, and the cylinder liner and the inner cavity of the cylinder body are interference-fitted. Therefore, when the plunger body moves back and forth inside the cylinder liner, it will not rub against the cylinder body, thereby improving the service life of the cylinder body. Moreover, the production cost of the cylinder liner is much lower than that of the cylinder body, thus improving its practical performance. However, there is a problem that the cylinder liner is pressed into the cylinder body, and its removal and installation are relatively time-consuming and laborious, making the replacement less convenient. Utility Model Content

[0004] To address the shortcomings of existing technologies, this utility model provides a modular cylinder liner assembly for quick-replacement piston pumps, which solves the problem that the cylinder liner is pressed into the cylinder block, and the removal and installation are time-consuming and laborious, making the replacement less convenient.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution: a modular cylinder liner assembly for a quick-change plunger pump, including a cylinder body, an end cap at the end of the cylinder body, a quick-change cylinder liner mechanism inside the cylinder body, and a sealing mechanism between the end cap and the cylinder body;

[0006] The quick-change cylinder liner mechanism includes a cylinder liner and two guide grooves. The guide grooves are disposed on the inner wall of the cylinder body. A sealing plate is fixedly connected to the end of the cylinder liner. A first sealing ring is provided on one side of the sealing plate. Two positioning rods are fixedly connected to one side surface of the sealing plate. Each of the two positioning rods has a receiving groove. A pressing block is slidably connected inside the receiving groove. A first spring is provided between the pressing block and the inner wall of the receiving groove. A pressing inclined surface is provided at one end of the pressing block. A lifting inclined block is fixedly connected to the bottom end of the pressing block. A pushing inclined block is provided on one side of the lifting inclined block. A second spring is provided on both sides of the pushing inclined block. A pressing bolt is provided on one side of the pushing inclined block. An elastic washer is provided on the pressing bolt.

[0007] Preferably, the cylinder block has an internal mounting groove that matches the cylinder liner and sealing plate, allowing the cylinder liner and sealing plate to be installed inside the mounting groove.

[0008] Preferably, the clamping block and the lifting inclined block move radially, and the pushing inclined block moves axially, so that the pushing inclined block can push the lifting inclined block to move up and down.

[0009] Preferably, both the lifting inclined block and the pushing inclined block are provided with inclined surfaces, and the lifting inclined block and the pushing inclined block are in contact with each other through the inclined surfaces, so that the pushing inclined block can use the inclined surfaces to push the lifting inclined block to move.

[0010] Preferably, one end of the second spring abuts against the inner wall of the positioning rod, and the other end of the second spring abuts against the pushing block, so that the pushing block can be reset by means of the second spring.

[0011] Preferably, the end of the clamping bolt passes through the sealing plate and is connected to the outside. The clamping bolt is threadedly connected to the positioning rod, allowing the clamping bolt to be screwed into the positioning rod. Preferably, the sealing mechanism includes a second sealing ring and a third sealing ring, the cross-sectional area of ​​the second sealing ring being larger than that of the third sealing ring. Two sealing grooves are formed at the end of the cylinder body, and the second and third sealing rings match the two sealing grooves to improve sealing performance.

[0012] This invention provides a modular cylinder liner assembly for a quick-replacement piston pump. Compared with the prior art, it has the following advantages:

[0013] 1. This quick-replaceable modular cylinder liner assembly for piston pumps allows for rapid cylinder liner replacement by inserting the cylinder liner into the cylinder block, then inserting the clamping bolt with an elastic washer into the positioning rod, and finally tightening the clamping bolt with a wrench. The clamping bolt moves the clamping block, which pushes the cylinder liner into the cylinder block, compressing the first sealing ring for sealing. This allows for quick cylinder liner replacement without the need for forceful pressing or pulling, effectively improving the convenience of replacement.

[0014] 2. This quick-change modular cylinder liner assembly for piston pumps, by inserting the second and third sealing rings into the sealing groove, with the second sealing ring outside the third sealing ring, forms a double seal, which can improve the sealing performance between the end cover and the cylinder block. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of this utility model;

[0016] Figure 2 This is a schematic diagram of the quick-change cylinder liner mechanism of this utility model;

[0017] Figure 3 This is a schematic diagram of the connection structure between the clamping bolt and the clamping block of this utility model;

[0018] Figure 4 This is a schematic diagram of the sealing mechanism of this utility model.

[0019] In the diagram: 1. Cylinder block; 2. Quick-change cylinder liner mechanism; 201. Cylinder liner; 202. Guide groove; 203. Sealing plate; 204. First sealing ring; 205. Positioning rod; 206. Receiving groove; 207. Clamping block; 208. Clamping inclined surface; 209. Lifting inclined block; 210. Pushing inclined block; 211. Second spring; 212. Clamping bolt; 213. Elastic pad

[0020] 3. End cap; 4. Sealing mechanism; 401. Second sealing ring; 402. Third sealing ring. Detailed Implementation

[0021] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0022] Please see Figures 1 to 3 This utility model provides a technical solution: a modular cylinder liner assembly for a quick-change plunger pump, including a cylinder body 1, an end cap 3 at the end of the cylinder body 1, a quick-change cylinder liner mechanism 2 inside the cylinder body 1, and a sealing mechanism 4 between the end cap 3 and the cylinder body 1. The cylinder liner 201 can be quickly replaced through the quick-change cylinder liner mechanism 2 without the need for force to press in and pull out, effectively improving the convenience of replacement.

[0023] The quick-change cylinder liner mechanism 2 includes a cylinder liner 201 and two guide grooves 202. The guide grooves 202 match the clamping inclined surface 208, allowing the clamping block 207 to move along the guide grooves 202. The guide grooves 202 are located on the inner wall of the cylinder body 1. A sealing plate 203 is fixedly connected to the end of the cylinder liner 201. An installation groove is provided inside the cylinder body 1, which matches the cylinder liner 201 and the sealing plate 203, allowing the cylinder liner 201 and the sealing plate 203 to be installed into the installation groove. A first sealing ring 204 is provided on one side of the sealing plate 203. Two positioning rods 205 are fixedly connected to one side of the surface of 203. Each positioning rod 205 has a receiving groove 206. A clamping block 207 is slidably connected inside the receiving groove 206. A first spring is provided between the clamping block 207 and the inner wall of the receiving groove 206 to reset the clamping block 207. One end of the clamping block 207 has a clamping inclined surface 208, and a lifting inclined block 209 is fixedly connected to the bottom end of the clamping block 207. A pushing inclined block 210 is provided on one side of the lifting inclined block 209. The clamping block 207 and the lifting inclined block 209 move radially, and the pushing inclined block 210... The axial movement allows the pushing inclined block 210 to push the lifting inclined block 209 to move up and down. Both the lifting inclined block 209 and the pushing inclined block 210 have inclined surfaces, which contact each other, allowing the pushing inclined block 210 to use the inclined surfaces to push the lifting inclined block 209 to move. Second springs 211 are provided on both sides of the pushing inclined block 210. One end of the second spring 211 abuts against the inner wall of the positioning rod 205, and the other end abuts against the pushing inclined block 210, allowing the second spring 211 to move up and down. 11. The pusher block 210 is reset. A clamping bolt 212 is provided on one side of the pusher block 210. The end of the clamping bolt 212 passes through the sealing plate 203 and is connected to the outside. The clamping bolt 212 is threadedly connected to the positioning rod 205. The positioning rod 205 has an inlet hole inside. The rear end of the inlet hole has a thread, which allows the clamping bolt 212 to be inserted into the positioning rod 205 and screwed into the positioning rod 205 for fixation. An elastic washer 213 is provided on the clamping bolt 212 to prevent the clamping bolt 212 from loosening.

[0024] Please see Figure 1 and Figure 4 The sealing mechanism 4 includes a second sealing ring 401 and a third sealing ring 402. The cross-sectional area of ​​the second sealing ring 401 is larger than that of the third sealing ring 402. Two sealing grooves are opened at the end of the cylinder body 1. The second sealing ring 401 and the third sealing ring 402 are matched with the two sealing grooves. By inserting the second sealing ring 401 and the third sealing ring 402 into the sealing grooves, with the second sealing ring 401 outside the third sealing ring 402, a double seal is formed, which can improve the sealing performance between the end cover 3 and the cylinder body 1.

[0025] During operation, the cylinder liner 201 is inserted into the cylinder body 1. Then, the clamping bolt 212, fitted with an elastic washer 213, is inserted into the positioning rod 205. The clamping bolt 212 is then tightened by turning it with a wrench. The rotation of the clamping bolt 212 pushes the inclined block 210 to move. The inclined block 210 uses its inclined surface to push the inclined block 209 to move radially. The movement of the inclined block 209 causes the clamping block 207 to move. The clamping block 207 uses its clamping inclined surface 208 to slide along the guide groove 202, pushing the cylinder liner 201 to move into the cylinder body 1. The movement of the cylinder liner 201 causes the sealing plate 203 to move, pressing the first sealing ring 204 to seal. The cylinder liner 201 can be quickly replaced without the need for force to press in and pull out, effectively improving the convenience of replacement.

[0026] Furthermore, any content not described in detail in this specification is existing technology known to those skilled in the art.

Claims

1. A quick-change plunger pump modular cartridge assembly comprising a cylinder block (1), characterized in that: The cylinder body (1) is provided with an end cap (3) at the end, and a quick-change cylinder liner mechanism (2) is provided inside the cylinder body (1). A sealing mechanism (4) is provided between the end cap (3) and the cylinder body (1). The quick-change cylinder liner mechanism (2) includes a cylinder liner (201) and two guide grooves (202). The guide grooves (202) are provided on the inner wall of the cylinder body (1). A sealing plate (203) is fixedly connected to the end of the cylinder liner (201). A first sealing ring (204) is provided on one side of the sealing plate (203). Two positioning rods (205) are fixedly connected to one side surface of the sealing plate (203). Each of the two positioning rods (205) has a receiving groove (206). A pressing block (2) is slidably connected inside the receiving groove (206). 07), a first spring is provided between the clamping block (207) and the inner wall of the receiving groove (206), a clamping inclined surface (208) is provided at one end of the clamping block (207), a lifting inclined block (209) is fixedly connected to the bottom end of the clamping block (207), a pushing inclined block (210) is provided on one side of the lifting inclined block (209), a second spring (211) is provided on both sides of the pushing inclined block (210), a clamping bolt (212) is provided on one side of the pushing inclined block (210), and an elastic washer (213) is provided on the clamping bolt (212).

2. A quick change plunger pump modular liner assembly according to claim 1, characterized in that: The cylinder body (1) is provided with an installation groove inside, which matches the cylinder liner (201) and the sealing plate (203).

3. A quick change plunger pump modular liner assembly as claimed in claim 1, wherein: The clamping block (207) and the lifting inclined block (209) move radially, and the pushing inclined block (210) moves axially.

4. A quick change plunger pump modular liner assembly as claimed in claim 1, wherein: Both the lifting inclined block (209) and the pushing inclined block (210) are provided with inclined surfaces, and the lifting inclined block (209) and the pushing inclined block (210) are in contact with each other through the inclined surfaces.

5. A quick change plunger pump modular liner assembly as claimed in claim 1, wherein: One end of the second spring (211) abuts against the inner wall of the positioning rod (205), and the other end of the second spring (211) abuts against the pushing inclined block (210).

6. A quick change plunger pump modular liner assembly as claimed in claim 1, wherein: The end of the clamping bolt (212) passes through the sealing plate (203) and is connected to the outside. The clamping bolt (212) is threadedly connected to the positioning rod (205).

7. A modular cylinder liner assembly for a quick-replaceable plunger pump according to claim 1, characterized in that: The sealing mechanism (4) includes a second sealing ring (401) and a third sealing ring (402), wherein the cross-sectional area of ​​the second sealing ring (401) is greater than the cross-sectional area of ​​the third sealing ring (402).

8. A quick change plunger pump modular liner assembly according to claim 7, characterized in that: The cylinder body (1) has two sealing grooves at its end, and the second sealing ring (401) and the third sealing ring (402) are matched with the two sealing grooves.

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