Plunger valve and plunger pump

Abstract

The plunger valve comprises a base and a plunger, the base is provided with a containing cavity, a liquid inlet channel and a liquid discharging channel, the liquid inlet channel is parallel to the liquid discharging channel, the liquid inlet channel and the liquid discharging channel are both communicated with the containing cavity, a first plug screw is arranged at the end, close to the containing cavity, of a first plugging channel, and a second plug screw is arranged at the end, close to the liquid discharging channel, of the first plugging channel. A first ball is arranged at the end, close to the first connecting channel, of the first plugging channel, a second ball is arranged at the end, close to the containing cavity, of the second plugging channel, a second screw plug is arranged at the end, away from the second connecting channel, of the second plugging channel, and an elastic piece is arranged between the second ball and the second screw plug. One end of the plunger extends into the containing cavity, and the plunger moves relative to the containing cavity. The liquid inlet channel is parallel to the liquid discharge channel, so that the plunger can conveniently apply enough suction force to the first ball body, and the plunger can conveniently apply thrust force to the first ball body through hydraulic oil, and the first ball body can be rapidly reset.

Description

Technical Field

[0001] The utility model relates to the technical field of hydraulic valves, in particular to a plunger valve and a plunger pump. Background Art

[0002] The plunger pump is an important device in the hydraulic system. It relies on the reciprocating motion of the plunger in the cylinder body, and the linkage of the liquid inlet channel and the liquid discharge channel to change the volume of the sealed working chamber to achieve oil suction and oil pressure. The plunger pump has the advantages of high rated pressure, compact structure, high efficiency and convenient flow adjustment.

[0003] At present, the inlet channel is arranged horizontally, the discharge channel is arranged vertically, and the inlet channel intersects with the discharge channel, so that the inlet channel and the discharge channel form a cross-shaped structure. Since the ball in the inlet channel is not affected by gravity, an elastic member is arranged in the inlet channel to allow the ball to close the inlet channel. However, when the plunger moves upward to a certain height, the suction force generated by the plunger on the ball in the inlet channel is insufficient, and the inlet channel is easily pushed by the elastic member to close. Utility Model Content

[0004] Based on the above description, the utility model provides a plunger valve and a plunger pump, which aim to solve the problem that when the existing plunger moves upward to a certain height, the ball is affected by the elastic member to close the liquid inlet channel.

[0005] The technical solution of the utility model to solve the above technical problems is as follows:

[0006] In a first aspect, a plunger valve comprises:

[0007] A base, comprising an accommodating cavity, a liquid inlet channel and a liquid discharge channel, wherein the liquid inlet channel is parallel to the liquid discharge channel, and both the liquid inlet channel and the liquid discharge channel are communicated with the accommodating cavity, the liquid inlet channel comprises a first blocking channel and a first connecting channel, a first screw plug is provided at one end of the first blocking channel close to the accommodating cavity, a first ball is provided at one end of the first blocking channel close to the first connecting channel, the liquid discharge channel comprises a second blocking channel and a second connecting channel, a second ball is provided at one end of the second blocking channel close to the accommodating cavity, a second screw plug is provided at one end of the second blocking channel away from the second connecting channel, and an elastic member is provided between the second ball and the second screw plug;

[0008] A plunger has one end extending into the accommodating cavity, and the plunger moves relative to the accommodating cavity.

[0009] On the basis of the above technical solution, the present invention can also be improved as follows.

[0010] Furthermore, a sealing member is provided between the inner wall of the accommodating cavity and the plunger.

[0011] Furthermore, the sealing element is an oil seal.

[0012] Furthermore, a piston sleeve is provided between the head of the plunger and the accommodating chamber.

[0013] Furthermore, it includes a connecting sleeve and at least two guide rods, the connecting sleeve is arranged on the end of the plunger away from the base, at least two guide rods are arranged at intervals around the axis of the connecting sleeve, the base is provided with a guide hole corresponding to each guide rod, and the guide rod is slidably matched with the guide hole.

[0014] Furthermore, it comprises a liquid inlet nozzle, and a mounting hole is provided at one end of the first connecting channel away from the first blocking channel, and the liquid inlet nozzle is mounted on the mounting hole.

[0015] Furthermore, the liquid inlet nozzle is conical.

[0016] In a second aspect, a plunger pump is provided with the plunger valve according to the first aspect.

[0017] Compared with the prior art, the technical solution of this application has the following beneficial technical effects:

[0018] (1) The present application makes the liquid inlet channel and the liquid discharge channel parallel, which can facilitate the plunger to apply sufficient suction to the first sphere, and also facilitate the plunger to apply thrust to the first sphere through hydraulic oil, so that the first sphere can be quickly reset. At the same time, the first connecting channel and the first blocking channel can be opened and closed by the cooperation of the first sphere and the first screw plug, and the second connecting channel and the second blocking channel can be opened and closed by the cooperation of the second sphere and the second screw plug, which facilitates the linkage between the liquid inlet channel and the liquid discharge channel, thereby ensuring work efficiency.

[0019] (2) The present application can ensure the stability of the plunger movement through the cooperation of the guide rod and the guide hole.

[0020] (3) The present application can control the liquid flow rate and liquid pressure of the liquid inlet channel through the liquid inlet nozzle, thereby controlling the movement speed of the plunger. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 This is a general assembly diagram of a plunger valve and a plunger pump provided in an embodiment of the utility model;

[0022] Figure 2 This is a schematic diagram of the structure of the base in the embodiment of the utility model;

[0023] Figure 3 It is a vertical cross-sectional view of the base in the embodiment of the utility model.

[0024] In the accompanying drawings, the components represented by the reference numerals are listed as follows:

[0025] 10. Base; 101. Accommodating cavity; 102. Liquid inlet channel; 1021. First blocking channel; 1022. First connecting channel; 1023. Mounting hole; 103. Liquid discharge channel; 1031. Second blocking channel; 1032. Second connecting channel; 104. Guide hole; 11. First screw plug; 12. First sphere; 13. Second sphere; 14. Second screw plug; 15. Elastic member; 16. Sealing member;

[0026] 20. plunger; 21. plug sleeve;

[0027] 30. Connecting sleeve;

[0028] 40. Guide rod;

[0029] 50. Liquid inlet nozzle. DETAILED DESCRIPTION

[0030] In order to facilitate understanding of the present application, the present application will be described more fully below with reference to the relevant drawings. Embodiments of the present application are provided in the drawings. However, the present application can be implemented in many different forms and is not limited to the embodiments described herein. On the contrary, the purpose of providing these embodiments is to make the disclosure of the present application more thorough and comprehensive.

[0031] Unless otherwise defined, all technical and scientific terms used herein have the same meaning as those commonly understood by those skilled in the art to which this application belongs. The terms used herein in the specification of this application are only for the purpose of describing specific embodiments and are not intended to limit this application.

[0032] It will be appreciated that spatial relationship terms such as "under," "beneath," "below," "under," "above," "above," etc., may be used herein to describe the relationship of an element or feature shown in the figures to other elements or features. It will be appreciated that, in addition to the orientations shown in the figures, spatial relationship terms also include different orientations of the device in use and operation. For example, if the device in the accompanying drawings is flipped, an element or feature described as "under other elements" or "under it" or "under it" will be oriented as being "above" the other elements or features. Thus, the exemplary terms "under" and "under" may include both upper and lower orientations. In addition, the device may also include additional orientations (e.g., rotated 90 degrees or other orientations), and the spatial descriptors used herein are interpreted accordingly.

[0033] As used herein, the singular forms "a", "an" and "the" may also include the plural forms unless the context clearly dictates otherwise. It should also be understood that the terms "comprising", "including" or "having" and the like specify the presence of the stated features, integers, steps, operations, components, parts or combinations thereof, but do not preclude the presence or addition of one or more other features, integers, steps, operations, components, parts or combinations thereof.

[0034] Referring to the attached Figures 1 to 3 As shown, the present utility model provides a technical solution: a plunger valve, comprising a base 10 and a plunger 20. The base 10 has a receiving cavity 101, a liquid inlet channel 102 and a liquid discharge channel 103. The liquid inlet channel 102 is parallel to the liquid discharge channel 103. Both the liquid inlet channel 102 and the liquid discharge channel 103 are communicated with the receiving cavity 101. The liquid inlet channel 102 includes a first blocking channel 1021 and a first connecting channel 1022. A first plug 11 is provided at one end of the first blocking channel 1021 close to the receiving cavity 101, and a first ball 12 is provided at one end of the first blocking channel 1021 close to the first connecting channel 1022. The liquid discharge channel 103 includes a second blocking channel 1031 and a second connecting channel 1032. A second ball 13 is provided at one end of the second blocking channel 1031 close to the receiving cavity 101, and a second plug 14 is provided at one end of the second blocking channel 1031 away from the second connecting channel 1032. An elastic member 15 is provided between the second ball 13 and the second plug 14. One end of the plunger 20 extends into the receiving cavity 101, and the plunger 20 moves relative to the receiving cavity 101.

[0035] Exemplarily, the first connecting channel 1022 is in a shape of "|" or "L", etc. The elastic member 15 can be a spring or an elastic rubber ring, etc. The material of the base 10 can be aluminum, etc.

[0036] According to this embodiment, when the plunger 20 moves upward, the head of the plunger 20 generates suction force on the first sphere 12 and the second sphere 13, which can drive the first sphere 12 to move toward the first screw plug 11. At the same time, the second sphere 13 blocks the second connecting channel 1032 through the action of the elastic member 15, so that the first connecting channel 1022 is connected with the first blocking channel 1021, and the hydraulic oil enters the accommodating chamber 101 from the first connecting channel 1022 and the first blocking channel 1021 in sequence. When the plunger 20 moves downward, the head of the plunger 20 squeezes the hydraulic oil in the accommodating chamber 101, and the hydraulic oil generates thrust force on the first sphere 12 and the second sphere 13, the first sphere 12 blocks the first connecting channel 1022, the second sphere 13 moves toward the second screw plug 14, and the elastic member 15 generates compression deformation, so that the second blocking channel 1031 is connected with the second connecting channel 1032, and the hydraulic oil is discharged from the second connecting channel 1032 and the second blocking channel 1031. By making the liquid inlet channel 102 and the liquid discharge channel 103 parallel, it is convenient for the plunger 20 to apply sufficient suction to the first sphere 12, reducing the possibility of the first sphere 12 closing the first connecting pipe, and it is convenient for the plunger 20 to apply thrust to the first sphere 12 through hydraulic oil, so that the first sphere 12 can be quickly reset. At the same time, the first connecting channel 1022 and the first blocking channel 1021 are opened and closed by the cooperation of the first sphere 12 and the first screw plug 11, and the second connecting channel 1032 and the second blocking channel 1031 are opened and closed by the cooperation of the second sphere 13 and the second screw plug 14, which facilitates the linkage between the liquid inlet channel 102 and the liquid discharge channel 103, thereby ensuring work efficiency.

[0037] Refer to the attached Figure 1 As shown, in some embodiments, a sealing member 16 is provided between the inner wall of the accommodating cavity 101 and the plunger 20. Preferably, the sealing member 16 is an oil seal.

[0038] Exemplarily, the material of the oil seal may be polytetrafluoroethylene or the like.

[0039] According to this embodiment, the material ensures the sealing performance between the plunger 20 and the inner wall of the accommodating chamber 101. At the same time, due to the small friction resistance, the plunger 20 has a good lubrication effect, ensuring that the plunger 20 moves smoothly.

[0040] Refer to the attached Figure 1 As shown, in some embodiments, a piston sleeve 21 is provided between the head of the plunger 20 and the accommodating chamber 101 .

[0041] Exemplarily, the material of the piston sleeve 21 may be fluororubber, nitrile rubber or silicone rubber.

[0042] According to this embodiment, the piston sleeve 21 ensures the sealing between the head of the plunger 20 and the inner wall of the accommodating chamber 101, which can not only prevent the leakage of hydraulic oil, but also can normally generate suction force on the first sphere 12 and the second sphere 13 or squeeze force on the hydraulic oil.

[0043] Refer to the attached Figure 1 As shown, in some embodiments, a connecting sleeve 30 and at least two guide rods 40 are included. The connecting sleeve 30 is sleeved on the end of the plunger 20 away from the base 10. At least two guide rods 40 are spaced apart around the axis of the connecting sleeve 30. The base 10 is provided with a guide hole 104 corresponding to each guide rod 40, and the guide rod 40 is slidably matched with the guide hole 104.

[0044] According to this embodiment, when the plunger 20 moves in the vertical direction, the stability of the movement of the plunger 20 can be ensured through the cooperation between the guide rod 40 and the guide hole 104 .

[0045] Refer to the attached Figure 1~2 As shown, in some embodiments, a liquid inlet nozzle 50 is included, and a mounting hole 1023 is provided at one end of the first connecting channel 1022 away from the first blocking channel 1021, and the liquid inlet nozzle 50 is mounted in the mounting hole 1023. Preferably, the liquid inlet nozzle 50 is conical.

[0046] According to this embodiment, the liquid inlet flow rate and the liquid inlet pressure of the liquid inlet channel 102 can be controlled by the liquid inlet nozzle 50, so that the moving speed of the plunger 20 can be controlled.

[0047] The utility model provides a technical solution: a plunger pump, in which the plunger valve is arranged.

[0048] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A plunger valve, characterized in that: include: A base (10) comprises a receiving cavity (101), a liquid inlet channel (102) and a liquid discharge channel (103), wherein the liquid inlet channel (102) is parallel to the liquid discharge channel (103), the liquid inlet channel (102) and the liquid discharge channel (103) are both in communication with the receiving cavity (101), the liquid inlet channel (102) comprises a first blocking channel (1021) and a first connecting channel (1022), a first screw plug (11) is provided at one end of the first blocking channel (1021) close to the receiving cavity (101), and the first blocking channel (1022) is connected to the receiving cavity (101). A first spherical body (12) is provided at one end of the second sealing channel (1021) close to the first connecting channel (1022), the liquid discharge channel (103) comprises a second blocking channel (1031) and a second connecting channel (1032), a second spherical body (13) is provided at one end of the second blocking channel (1031) close to the accommodating chamber (101), a second screw plug (14) is provided at one end of the second blocking channel (1031) away from the second connecting channel (1032), and an elastic member (15) is provided between the second spherical body (13) and the second screw plug (14); A plunger (20) has one end extending into the accommodating cavity (101), and the plunger (20) moves relative to the accommodating cavity (101).

2. The plunger valve according to claim 1, characterized in that: A sealing member (16) is provided between the inner wall of the accommodating cavity (101) and the plunger (20).

3. The plunger valve according to claim 2, characterized in that: The sealing element (16) is an oil seal.

4. The plunger valve according to claim 1, characterized in that: A piston sleeve (21) is provided between the head of the plunger (20) and the accommodating chamber (101).

5. The plunger valve according to claim 1, characterized in that: The invention comprises a connecting sleeve (30) and at least two guide rods (40), wherein the connecting sleeve (30) is sleeved on an end of the plunger (20) away from the base (10), and at least two guide rods (40) are spaced apart around the axis of the connecting sleeve (30). The base (10) is provided with a guide hole (104) corresponding to each guide rod (40), and the guide rod (40) is slidably matched with the guide hole (104).

6. The plunger valve according to claim 1, characterized in that: It comprises a liquid inlet nozzle (50), an end of the first connecting channel (1022) away from the first blocking channel (1021) is provided with a mounting hole (1023), and the liquid inlet nozzle (50) is mounted on the mounting hole (1023).

7. The plunger valve according to claim 6, characterized in that: The liquid inlet nozzle (50) is conical.

8. A plunger pump, characterized in that: The plunger pump is provided with a plunger valve according to any one of claims 1 to 7.

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