One-way valve mounting structure of hydraulic direct-drive plunger pump

Abstract

The utility model relates to the technical field, in particular to a one-way valve installation structure of a hydraulic direct-drive plunger pump, which is used for being installed on a pump shell of the plunger pump, the pump shell comprises a main shell and end shells arranged at two ends of the main shell, the pump shell is provided with a flow channel for water to flow through, and a water cavity of the plunger pump is arranged in the end shells. At least part of the flow channel is located on the end shell to form a branch flow channel, and the one-way valve is detachably installed on the end shell and used for controlling on / off of the branch flow channel; compared with an existing mode that the one-way valve is installed between the critical faces of the end shell and the main shell, when the one-way valve needs to be disassembled and assembled, the end shell and the main shell do not need to be separated, and operation can be directly conducted on the end shell.

Description

Technical Field

[0001] The utility model relates to the technical field of plunger pumps, in particular to a one-way valve installation structure of a hydraulic direct-drive plunger pump. Background Art

[0002] A hydraulic direct-drive plunger pump refers to a pump structure that uses hydraulic propulsion to drive the plunger to move axially back and forth to achieve high-pressure pumping of liquid.

[0003] It is generally composed of a pump casing and a plunger assembly arranged in the pump casing, and the plunger assembly includes a plunger and a reversing mechanism; the plunger can move back and forth axially between two dead point positions; when in use, hydraulic oil is injected into the oil chamber in the pump casing, and the plunger assembly is pushed to one side under the action of the pressure of the hydraulic oil. When the plunger moves to the dead point position on that side, the reversing mechanism inside the plunger assembly completes the reversal, so that the hydraulic oil pushes the plunger assembly to the other dead point position, and this cycle is repeated, pushing the plunger assembly to move back and forth between the two dead point positions, thereby squeezing the water in the water chamber to achieve water pumping.

[0004] In a plunger pump, a one-way valve is generally required to control the channel between the water inlet and outlet channels, and cooperate with the action of the plunger to realize the water inlet and pumping action of the plunger pump.

[0005] In the related art, the pump casing of the plunger pump is generally composed of a main casing and end casings arranged at both ends or both sides of the main casing. When installing a one-way valve, the one-way valve is generally installed at the critical surface position of the main casing and the end casing. The one-way valve is clamped between the main casing and the end casing to achieve the installation of the one-way valve. For details, please refer to the hydraulic booster disclosed in publication number CN211116858U.

[0006] The existing installation method of installing the one-way valve on the critical surface of the main housing and the end housing has certain shortcomings during use. That is, when the one-way valve needs to be disassembled, the main housing and the end housing must be separated before the one-way valve can be taken out; therefore, there is room for improvement. Utility Model Content

[0007] In order to solve at least one of the technical problems mentioned in the background technology, the purpose of the present invention is to provide a one-way valve installation structure for a hydraulic direct-drive plunger pump.

[0008] To achieve the above objectives, the present invention provides the following technical solutions:

[0009] The one-way valve mounting structure of a hydraulic direct-drive plunger pump is used to be installed on the pump casing of the plunger pump. The pump casing includes a main casing and end casings arranged at both ends of the main casing. The pump casing has a flow channel for water circulation, and the water chamber of the plunger pump is arranged in the end casing; the flow channel is at least partially located on the end casing to form a branch flow channel, and the one-way valve is detachably mounted on the end casing to control the on / off of the branch flow channel.

[0010] As an optional embodiment of the present invention, the end shell is provided with an installation port for installing the one-way valve, the installation port has a stepped surface, and the one-way valve is pressed against the stepped surface by a pressing member.

[0011] As an optional embodiment of the present invention, the pressing member includes a pressing cap with threads on the outer peripheral wall, and the pressing cap is threadedly connected to the installation port.

[0012] As an optional implementation of the present invention, the pressing member is a bolt.

[0013] As an optional embodiment of the present invention, the flow channels include two, each end shell is provided with a water cavity, and the two ends of the two flow channels are respectively connected to the two water cavities; the two flow channels are respectively an inlet flow channel and an outlet flow channel; among the two one-way valves located in the outlet flow channel, one of the pressure caps is provided with a water outlet to serve as the water outlet end of the plunger pump.

[0014] Compared with the existing technology, the advantages of adopting this solution are:

[0015] In this solution, the one-way valve is installed in a detachable manner on the end shell. Compared with the existing method of installing the one-way valve between the critical surface of the end shell and the main shell, this installation method does not require separating the end shell and the main shell when the one-way valve needs to be disassembled and assembled, and the operation can be performed directly on the end shell.

[0016] It is worth noting that the reason why the one-way valve can be installed directly on the end shell in this solution is that the water chamber and branch flow channel of the plunger pump are arranged on the end shell. Therefore, installing the one-way valve on the end shell can also control the on-off of the flow channel and ensure the normal operation of the plunger pump. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 It is a structural diagram of the utility model;

[0018] Figure 2 It is a cross-sectional view of the utility model;

[0019] Figure 3 for Figure 2 A partial enlarged view of the

[0020] Figure 4 for Figure 3Enlarged view of part A in the middle. DETAILED DESCRIPTION

[0021] The following is an explanation and description of the technical solutions of the embodiments of the present invention in conjunction with the drawings of the embodiments of the present invention, but the following embodiments are only preferred embodiments of the present invention and are not exhaustive. Based on the embodiments in the embodiments, other embodiments obtained by those skilled in the art without creative work are all within the scope of protection of the present invention.

[0022] In the following description, terms such as "inside", "outside", "up", "down", "left", "right", etc. that indicate directions or positional relationships are only used to facilitate the description of the embodiments and simplify the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operate in a specific direction. Therefore, they should not be understood as limiting the present invention.

[0023] See also Figure 1-3 As shown, this embodiment provides a one-way valve installation structure of a hydraulic direct-drive plunger pump, which is used to be installed on a pump housing 1 of the plunger pump.

[0024] A hydraulic direct drive plunger pump is a pump that uses hydraulic pressure as a power source to push the plunger 21 to achieve water pumping. For example, hydraulic oil provides hydraulic pressure. For ease of description, the hydraulic direct drive plunger pump is referred to as a plunger pump below.

[0025] In order to better understand this embodiment, the structure of the plunger pump is first described in detail:

[0026] The plunger pump mainly includes a pump housing 1 and a plunger assembly. The pump housing 1 is provided with an oil chamber 111 , a water chamber 121 , and a channel 13 located between the water chamber 121 and the oil chamber 111 .

[0027] like Figure 1 As shown, the oil chamber 111 is used for supplying hydraulic oil. In addition, an oil inlet 111a and an oil outlet 111b connected to the oil chamber 111 are provided on the pump housing 1. When in use, the hydraulic oil enters the oil chamber 111 through the oil inlet 111a and finally flows out through the oil outlet 111b.

[0028] In some embodiments, the specific structure of the pump housing 1 is that the pump housing 1 includes a main housing 11 and end housings 12 provided at both ends of the main housing 11 .

[0029] In this embodiment, if Figure 2 As shown, the water chambers 121 include two, and along the axial direction, the two water chambers 121 are symmetrically arranged on both sides of the oil chamber 111. The axial direction claimed in this embodiment can be understood as the axial direction of the plunger 21.

[0030] It is understandable that the passage 13 is provided between the two water chambers 121 and the oil chamber 111 . When the plunger assembly is removed, the oil chamber 111 and the water chamber 121 are communicated via the passage 13 .

[0031] In some embodiments, the two water chambers 121 are respectively disposed in the two end shells 12 , and the oil passage is disposed in the main shell 11 .

[0032] The plunger assembly includes a plunger 21 and a reversing mechanism 22. The plunger 21 is movably arranged in the channel 13. It can reciprocate along the channel 13 under the drive of the oil pressure in the oil chamber 111, and its two ends can be inserted into the corresponding water chamber 121 when the plunger 21 moves to drive the water chamber 121 to absorb and pump water.

[0033] Specifically, Figure 2 Taking the perspective shown as an example, when the plunger 21 is pushed to move by the hydraulic oil, the left end of the plunger 21 will continuously insert into the water chamber 121 on the left, thereby squeezing the water in the water chamber 121 on the left, so that the water in the water chamber 121 on the left is pressed out, that is, the aforementioned water pumping; at the same time, the right end of the plunger 21 will continuously be drawn out from the water chamber 121 on the right to the left. As the right end of the plunger 21 is continuously drawn out, the pressure in the water chamber 121 on the right gradually decreases to form a negative pressure, so that the water chamber 121 on the right starts to absorb water, waiting for the next action of the plunger 21; this cycle is repeated, and an alternating reciprocating action of one water chamber 121 pumping water and the other water chamber 121 absorbing water can be formed, thereby realizing the water pumping function of the plunger pump.

[0034] The reversing mechanism 22 in the plunger assembly is mainly used to achieve the reversing of the action of the plunger 21. Specifically, the plunger 21 can move back and forth axially between the left and right dead point positions. When in use, hydraulic oil is injected into the oil chamber 111 in the pump housing 1, and the plunger assembly is pushed to one side under the pressure of the hydraulic oil. When the plunger 21 moves to the dead point position on that side, the reversing mechanism 22 inside the plunger assembly completes the reversal, so that the hydraulic oil pushes the plunger assembly to the other dead point position. This cycle is repeated, pushing the plunger assembly to move back and forth between the two dead point positions, thereby squeezing the water in the water chamber 121 to achieve water pumping.

[0035] This type of reversing mechanism 22 has been widely used and described in existing hydraulic direct-drive plunger pumps, and this embodiment does not involve improvements to the reversing mechanism 22 , so no further details will be given here.

[0036] The pump housing 1 is further provided with two flow channels for water circulation, wherein the two flow channels are Figure 2 As shown, one of them is marked as the water inlet channel 3 and the other is marked as the water outlet channel 4.

[0037] The water inlet channel 3 has a water inlet 30, and the water outlet channel 4 has a water outlet 40; the two ends of the two channels (i.e., the water inlet channel 3 and the water outlet channel 4) are respectively connected to the two water chambers 121; thus, the water source to be pumped enters through the water inlet 30, is sucked into the water chamber 121 which is performing the water suction action along the water inlet channel 3; when the water chamber 121 is pumping water, the water in the water chamber 121 is pumped into the water outlet channel 4 and is finally discharged through the water outlet 40.

[0038] It can be understood that the water inlet 30 is equivalent to the water inlet end of the entire plunger pump, and the water outlet 40 is equivalent to the water outlet end of the plunger pump.

[0039] It is understandable that in order to ensure the sealing between the plunger 21 and the channel 13, a sealing structure 8 is provided in the channel 13, for example, by a sealing ring.

[0040] In this embodiment, the two water chambers 121 are respectively arranged in the two end shells 12; the two flow channels include a main channel and a branch flow channel 5, wherein, in some embodiments, the main channel is arranged in the main shell 11 and extends axially along the main shell 11; the branch flow channel 5 is arranged on the end shell 12, one end of which is connected to the water chamber 121 on the same side as it, and the other end is connected to the main channel.

[0041] It can be understood that, in this embodiment, both the water inlet flow channel 3 and the water outlet flow channel 4 are formed with branch flow channels 5 on the end shell 12 , and therefore, the two flow channels have a total of four branch flow channels 5 .

[0042] In order to distinguish, Figure 2 As shown, in this embodiment, the main channel of the water inlet channel 3 is recorded as the water inlet main channel 31 , and the main channel of the water outlet channel 4 is recorded as the water outlet main channel 41 ; the water inlet 30 is provided on the water inlet main channel 31 .

[0043] In some embodiments, the main water inlet channel 31 and the main water outlet channel 41 are provided on either side of the main housing 11. Furthermore, in this embodiment, two one-way valves are provided at both ends of the water inlet channel 3 and the water outlet channel 4. For example, a one-way valve is provided on each branch channel 5 to control the opening / closing of the corresponding branch channel 5.

[0044] It can be understood that a one-way valve refers to a valve that can only conduct fluid in one direction, that is, the fluid is only allowed to flow from the water inlet end to the water outlet end of the one-way valve, and the reverse direction is blocked and cannot flow back.

[0045] In this embodiment, each one-way valve can be detachably mounted on the end housing 12. Since the mounting structures of the one-way valves are substantially the same, one of the one-way valves will be specifically described below as an example.

[0046] Combine Figure 4As shown, a mounting port 14 for installing a one-way valve is provided on the end shell 12, and the mounting port 14 has a step surface 141. The one-way valve is pressed on the step surface 141 by a clamping member. The clamping member here includes a pressure cap 7 with threads on the outer peripheral wall. For example, in some embodiments, the pressure cap 7 can be a bolt.

[0047] The corresponding installation opening 14 has a threaded section on its peripheral wall that matches the thread of the pressure cap 7 , so that the pressure cap 7 is screwed into the installation opening 14 in a threaded connection manner to press the one-way valve against the step surface 141 to achieve the installation of the one-way valve.

[0048] Conversely, when the one-way valve needs to be removed, it is only necessary to unscrew the pressing cap 7 to remove the one-way valve from the installation opening 14 .

[0049] For the sake of distinction, in this embodiment, the two one-way valves located on the water inlet channel 3 are respectively referred to as first one-way valves 61, and the two one-way valves located on the water outlet channel 4 are respectively referred to as second one-way valves 62.

[0050] The first one-way valve 61 is configured to allow water in the water inlet channel 3 to flow toward the water cavity 121 in one direction, but blocks water from flowing in the opposite direction. That is, the first one-way valve 61 allows water in the main water inlet channel 31 to flow toward the water cavity 121 through the branch channel 5 of the water inlet channel 3, but blocks water from flowing in the opposite direction.

[0051] The second one-way valve 62 is configured to allow water in the water chamber 121 to flow toward the outlet channel 4 in one direction, but to block the flow in the opposite direction. That is, the second one-way valve 62 allows water in the water chamber 121 to flow into the main outlet channel 41 through the branch channel 5 of the outlet channel 4, but to block the flow in the opposite direction.

[0052] In addition, a water outlet hole is provided on the pressure cap 7 of one of the second one-way valves 62, which is connected to the water outlet end of the second one-way valve 62. For example, in this embodiment, Figure 2 The second one-way valve 62 in the upper right corner is provided with a water outlet hole. The water outlet hole serves as the water outlet 40 of the aforementioned water outlet channel 4, and can also be understood as the water outlet end of the plunger pump.

[0053] In this embodiment, the specific structures of the branch channels 5 are basically the same. The branch channels 5 are roughly L-shaped and mainly include a first channel 51 and a second channel 52 . The installation port 14 is opened at the connection position of the first channel 51 and the second channel 52 .

[0054] In the branch channel 5 of the water inlet channel 3, one end of the first channel 51 is connected to the water chamber 121, and the other end is connected to the water outlet end of the first one-way valve 61; one end of the second channel 52 is connected to the main water inlet channel 31, and the other end is connected to the water inlet end of the first one-way valve 61.

[0055] In the branch flow channel 5 of the outlet flow channel 4, one end of the first flow channel 51 is connected to the water chamber 121, and the other end is connected to the water inlet end of the second one-way valve 62; one end of the second flow channel 52 is connected to the main outlet flow channel 41, and the other end is connected to the water outlet end of the second one-way valve 62.

[0056] It will be apparent to those skilled in the art that the present invention is not limited to the details of the exemplary embodiments described above, and that the present invention can be implemented in other specific forms without departing from the spirit or essential features of the present invention. Therefore, the embodiments should be considered in all respects as illustrative and non-restrictive, and the scope of the present invention is defined by the appended claims rather than the foregoing description, and it is intended that all variations that come within the meaning and range of equivalents of the claims be embraced within the present invention.

Claims

1. The one-way valve mounting structure of the hydraulic direct-drive plunger pump is used to be mounted on the pump housing of the plunger pump, and is characterized in that: The pump housing includes a main housing and end housings arranged at both ends of the main housing. The pump housing has a flow channel for water circulation, and the water chamber of the plunger pump is arranged in the end housing; the flow channel is at least partially located on the end housing to form a branch flow channel, and the one-way valve is detachably installed on the end housing to control the on / off of the branch flow channel.

2. The one-way valve installation structure of the hydraulic direct-drive plunger pump according to claim 1, characterized in that: The end shell is provided with an installation port for installing the one-way valve, the installation port has a step surface, and the one-way valve is pressed on the step surface by a pressing component.

3. The one-way valve installation structure of the hydraulic direct-drive plunger pump according to claim 2, characterized in that: The pressing component comprises a pressing cap with threads on the outer peripheral wall, and the pressing cap is threadedly connected in the installation port.

4. The one-way valve installation structure of the hydraulic direct-drive plunger pump according to claim 3, characterized in that: The pressing member is a bolt.

5. The one-way valve installation structure of the hydraulic direct-drive plunger pump according to claim 3, characterized in that: The flow channels include two, each end shell is provided with a water cavity, and the two ends of the two flow channels are respectively connected to the two water cavities; the two flow channels are respectively an inlet flow channel and an outlet flow channel; among the two one-way valves located in the outlet flow channel, one of the pressure caps is provided with a water outlet to serve as the water outlet end of the plunger pump.

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