Internal rotation type plunger assembly

Abstract

The utility model discloses an internal rotation type plunger assembly which comprises a plunger, a plunger sleeve, an internal rotation type locking cover, a spring and a limiting plate, a movable opening is formed in the internal rotation type locking cover, one end of the plunger sequentially penetrates through the movable opening and the plunger sleeve, the other end of the plunger is fixedly connected with the limiting plate, one end of the spring is connected with the internal rotation type locking cover, and the other end of the spring is connected with the limiting plate. A locking pipe is sleeved on the internal rotation type locking cover, an annular locking plate is arranged on the inner side of one end of the locking pipe, and internal threads are arranged on the inner wall of the locking pipe. The internal rotation type plunger assembly is arranged in a modularized mode, the production requirements of high-pressure pumps of different models can be met, and the production cost of the high-pressure pumps can be effectively reduced. The internal rotation type plunger assembly is installed in the high-pressure pump after being produced, the machining difficulty of the high-pressure pump is lowered, and the production efficiency of the high-pressure pump is improved. All parts forming the internal rotation type plunger assembly are simple in assembly process and can be disassembled and maintained respectively, and the maintenance cost of the high-pressure pump is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of plungers, and in particular relates to an inward-rotating plunger assembly. Background Art

[0002] The plunger is needed to pressurize the oil in the high-pressure pump. The plunger on the existing high-pressure pump is generally directly processed and assembled on the pump body of the high-pressure pump. Its specific structure varies according to the structure of the high-pressure pump and is a component of the high-pressure pump. Since the high-pressure pump has other components, this leads to a complex processing and manufacturing process for the high-pressure pump, a long processing cycle, low production efficiency, and the easy occurrence of defective products during the production process. Utility Model Content

[0003] In order to solve the above technical problems, the technical solution adopted by the utility model is: an inward-rotating plunger assembly, including a plunger, a plunger sleeve, an inward-rotating locking cover, a spring and a limit plate, the inward-rotating locking cover is provided with a movable opening for the plunger to pass through, one end of the plunger passes through the movable opening and the plunger sleeve in sequence, and the other end is fixedly connected to the limit plate, one end of the spring is connected to the inward-rotating locking cover, and the other end is connected to the limit plate, the spring and the plunger are coaxially arranged, the inward-rotating locking cover is sleeved with a locking tube, an annular locking plate is provided on the inner side of one end of the locking tube, there is a movable space between the inner wall of the locking tube and the inward-rotating locking cover, and the inner wall of the locking tube is provided with an internal thread.

[0004] As a preferred embodiment of the above technical solution, the inward-rotating locking cover includes a large diameter section and a small diameter section arranged in sequence, the large diameter section and the small diameter section are fixedly connected by a retaining ring, the small diameter section passes through the annular locking plate, the outer diameter of the retaining ring is larger than the inner diameter of the annular locking plate, and the large diameter section is located inside the locking tube.

[0005] As a preferred embodiment of the above technical solution, the plunger includes a main section and an extension section connected in sequence, the diameter of the extension section is smaller than the diameter of the main section, the extension section extends from the movable port and is connected to the limit plate, and the diameter of the main section is larger than the diameter of the movable port.

[0006] As a preferred embodiment of the above technical solution, a pan-plug seal is sleeved on the main body section, and the pan-plug seal is clamped between the retaining ring and the plunger sleeve.

[0007] As a preferred embodiment of the above technical solution, a limiting ring for blocking the large diameter section is fixedly connected to the plunger sleeve.

[0008] As a preferred embodiment of the above technical solution, a pan-plug sealing limit ring is provided in the large diameter section.

[0009] As a preferred embodiment of the above technical solution, a sealing ring is sleeved on the large diameter section, and the sealing ring is located in the activity space.

[0010] The beneficial effects of the utility model are as follows: the modular setting of the inward-rotating plunger assembly in the present application can meet the production needs of high-pressure pumps of different models, and can effectively reduce the production cost of the high-pressure pump. After the production of the inward-rotating plunger assembly is completed, it is installed in the high-pressure pump, which reduces the processing difficulty of the high-pressure pump and improves the production efficiency of the high-pressure pump. The assembly process of the various components that make up the inward-rotating plunger assembly is simple, and they can be disassembled and maintained separately, which reduces the maintenance cost of the high-pressure pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0011] Figure 1 It is a schematic diagram of the cross-sectional structure of the utility model;

[0012] Figure 2 It is a three-dimensional schematic diagram of the utility model. DETAILED DESCRIPTION

[0013] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0014] In the description of the present invention, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "horizontal", "inner", "outer", etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as limiting the present invention. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance.

[0015] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0016] like Figure 1-2As shown, the inner-rotating plunger assembly includes a plunger 1, a plunger sleeve 2, an inner-rotating locking cover 3, a spring 4 and a limit plate 5. The inner-rotating locking cover 3 is provided with a movable opening 6 for the plunger 1 to pass through. One end of the plunger 1 passes through the movable opening 6 and the plunger sleeve 2 in sequence, and the other end is fixedly connected to the limit plate 5. One end of the spring 4 is connected to the inner-rotating locking cover 3, and the other end is connected to the limit plate 5. The spring 4 is coaxially arranged with the plunger 1. The inner-rotating locking cover 3 is sleeved with a locking tube 7. An annular locking plate 8 is provided on the inner side of one end of the locking tube 7. There is an active space 9 between the inner wall of the locking tube 7 and the inner-rotating locking cover 3. The inner wall of the locking tube 7 is provided with an internal thread. The above-mentioned inner-rotating plunger assemblies are installed one by one into the pump body of the high-pressure pump, and the end of the plunger 1 away from the limit plate 5 is inserted into the oil circuit in the pump body. A connecting pipe for connecting the locking tube 7 is reserved on the pump body. The connecting pipe is inserted into the active space 9 and is threadedly connected with the locking tube 7. After installation, the spring 4 is in an extended state, supporting the limit plate 5. Repeated force is applied to the limit plate 5, the spring is compressed, and the plunger 1 is inserted into the oil circuit to pressurize the oil in the oil circuit.

[0017] Furthermore, the inward-rotating locking cover 3 includes a large diameter section 10 and a small diameter section 11 arranged in sequence, the large diameter section 10 and the small diameter section 11 are fixedly connected by a retaining ring 12, the small diameter section 11 passes through the annular locking plate 8, the outer diameter of the retaining ring 12 is larger than the inner diameter of the annular locking plate 8, and the large diameter section 10 is located inside the locking tube 7.

[0018] Further, the plunger 1 includes a main section 13 and an extension section 14 connected in sequence, the diameter of the extension section 14 is smaller than the diameter of the main section 13, the extension section 14 extends from the movable opening 6 and is connected to the limit plate 5, and the diameter of the main section 13 is larger than the diameter of the movable opening 6. The movement of the main section 13 is limited by the movable opening 6.

[0019] Furthermore, a flood seal 15 is sleeved on the main body section 13, and the flood seal 15 is sandwiched between the retaining ring 12 and the plunger sleeve 2. The flood seal 15 improves the sealing performance of the entire plunger assembly.

[0020] Furthermore, a limiting ring 16 for blocking the large diameter section 10 is fixedly connected to the plunger sleeve 2 .

[0021] Furthermore, a pan-seal limiting ring 17 is provided in the large diameter section 10 .

[0022] Furthermore, a sealing ring 18 is sleeved on the large diameter section 10, and the sealing ring 18 is located in the active space 9. After the connecting pipe on the high-pressure pump body is inserted into the active space 9 and threadedly connected with the locking tube 7, the sealing ring 18 improves the sealing performance of the entire plunger assembly.

[0023] It is worth mentioning that the technical features such as the high-pressure pump involved in this utility model patent application should be regarded as prior art. The specific structure, working principle and possible control method and spatial layout method of these technical features can be selected according to the conventional methods in the field and should not be regarded as the inventive point of this utility model patent. This utility model patent will not be further elaborated.

[0024] The preferred specific embodiments of the utility model are described in detail above. It should be understood that ordinary technicians in this field can make many modifications and changes based on the concept of the utility model without creative work. Therefore, all technical solutions that can be obtained by technicians in this technical field through logical analysis, reasoning or limited experiments based on the concept of the utility model on the basis of the existing technology should be within the scope of protection determined by the claims.

Claims

1. An internally rotating plunger assembly, characterized in that: It includes a plunger, a plunger sleeve, an inward-rotating locking cover, a spring and a limit plate. The inward-rotating locking cover is provided with a movable opening for the plunger to pass through. One end of the plunger passes through the movable opening and the plunger sleeve in sequence, and the other end is fixedly connected to the limit plate. One end of the spring is connected to the inward-rotating locking cover, and the other end is connected to the limit plate. The spring and the plunger are coaxially arranged. A locking tube is sleeved on the inward-rotating locking cover, and an annular locking plate is provided on the inner side of one end of the locking tube. There is a movable space between the inner wall of the locking tube and the inward-rotating locking cover, and the inner wall of the locking tube is provided with an internal thread.

2. The internally rotating plunger assembly according to claim 1, characterized in that: The inner rotating locking cover includes a large diameter section and a small diameter section which are arranged in sequence. The large diameter section and the small diameter section are fixedly connected by a retaining ring. The small diameter section passes through the annular locking plate. The outer diameter of the retaining ring is larger than the inner diameter of the annular locking plate. The large diameter section is located inside the locking tube.

3. The internally rotating plunger assembly according to claim 2, characterized in that: The plunger includes a main body section and an extension section which are connected in sequence. The diameter of the extension section is smaller than the diameter of the main body section. The extension section extends from the movable opening and is connected to the limit plate. The diameter of the main body section is larger than the diameter of the movable opening.

4. The internally rotating plunger assembly according to claim 3, characterized in that: The main body section is sleeved with a flood seal, which is clamped between the retaining ring and the plunger sleeve.

5. The internally rotating plunger assembly according to claim 4, characterized in that: A limiting ring for blocking the large diameter section is fixedly connected to the plunger sleeve.

6. The internally rotating plunger assembly according to claim 4, characterized in that: A pan-seal limiting ring is arranged in the large diameter section.

7. The internally rotating plunger assembly according to claim 2, characterized in that: A sealing ring is sleeved on the large diameter section, and the sealing ring is located in the activity space.

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