Valve body structure for reciprocating pump

Abstract

The utility model discloses a valve body structure for a reciprocating pump, and relates to the technical field of reciprocating pumps. An oil injection mechanism; a gear set; a valve body assembly; the two sides of the toothed bar are each provided with a gear set and a valve body assembly, the gear part of the incomplete gear is used for being meshed with a rack on the toothed bar, the upper full gear and the lower full gear are connected through an intermediate gear in a meshed mode, and the intermediate gear is coaxially connected with a cam in a linkage mode. The ends, provided with the valve elements, of the two valve rods penetrate through the inner shell so that the valve elements can be matched with the corresponding valve ports, the spring is located in the inner shell, when the large-diameter curved surface of the cam makes contact with the rolling wheel, the spring is compressed, the valve ports are closed by the valve elements, and when the small-diameter curved surface of the cam makes contact with the rolling wheel, the elastic force of the spring is released, and the valve elements are opened. The technical effects that sealing is tight, the valve body is not clamped, medium particles are rolled, the valve element is stable in guiding, and the range of media used by the valve body is wide are achieved.

Description

TECHNICAL FIELD

[0001] The utility model relates to reciprocating pump technical field especially a valve body structure for reciprocating pump. BACKGROUND

[0002] Reciprocating pump usually relies on the reciprocating motion of piston or plunger to transport fluid, and the piston realizes the liquid suction and discharge by the opening and closing of the reversely installed one-way valve body at the inlet and outlet. The valve body structure is a key component in the reciprocating motion of the piston, responsible for controlling the one-way flow of fluid. Reciprocating pumps usually have pulsating flow, and the valve is frequently opened and closed, so the response speed, durability, sealing performance and anti-particle ability of the valve are very important, and its performance directly affects the efficiency and reliability of the pump. The current reciprocating pump commonly used one-way valve types include ball valve, plate valve, cone valve, butterfly valve and mushroom valve. In actual application conditions, different valve body structures have some structural and technical defects. The ball valve has poor sealing performance and is prone to impact noise when frequently opened and closed. The valve plate of the plate valve is prone to breakage and the valve plate is prone to jam. The cone valve has high requirements for medium cleanliness, the cone is prone to jam, and the manufacturing cost is high. The butterfly valve has poor sealing performance and is prone to leakage. The butterfly plate is prone to deformation. The mushroom valve has a complex structure, high machining precision requirement, and the valve core is prone to jam.

[0003] Therefore, a valve body structure for reciprocating pump is developed to solve the above problems. CONTENT OF THE UTILITY MODEL

[0004] The utility model provides a valve body structure for reciprocating pump to solve the valve body structure valve body poor sealing performance, easy to jam, easy to deform, high manufacturing cost problem of prior art reciprocating pump.

[0005] The utility model realizes the above-mentioned purpose through the following technical scheme:

[0006] The utility model discloses a valve body structure for reciprocating pump, which comprises:

[0007] The shell comprises an inner shell and an outer shell, the outer shell has two symmetrical valve ports and a diaphragm port for installing a diaphragm, and an oil injection port for connecting an oil injection structure;

[0008] The oil injection mechanism comprises an oil injection cavity, a one-way valve and an oil injection channel, the oil injection cavity is installed at the oil injection port, the oil injection channel is arranged inside the inner shell and communicates with the inner shell, the oil injection channel penetrates the oil injection cavity, and the one-way valve is arranged at the communication between the oil injection channel and one side of the oil injection cavity.

[0009] The gear set comprises an incomplete gear and a full gear, and the incomplete gear and the full gear are coaxially connected in linkage.

[0010] The valve body assembly comprises a valve rod, a valve core, a roller, and a spring, the valve core and the roller are arranged at two ends of the valve rod respectively, and the spring is sleeved on the valve rod and located between the valve core and the roller.

[0011] The rack is located inside the inner shell, one end of the rack is movably inserted into the oil injection port, the other end of the rack penetrates through the inner shell and is used for being connected with the diaphragm, each side of the rack is provided with a set of gear sets and a valve body assembly, the gear part of the incomplete gear is used for being meshed with the rack on the rack, the upper and lower complete gears are meshed and connected through the intermediate gear, the intermediate gear is coaxially connected with a cam, and one end of the two valve rods provided with the valve core penetrates through the inner shell so that the valve core is arranged in cooperation with the corresponding valve port.

[0012] Further, the oil injection channel comprises a first channel and a second channel, one end of the first channel and one end of the second channel are connected with the oil injection cavity, the other end of the first channel and the other end of the second channel are connected with the inner shell, the one-way valve is arranged at the connection position of one end of the first channel and the oil injection cavity, and the oil injection structure is a nozzle arranged at the other end port of the second channel.

[0013] Further, the valve rod is movably sleeved with a sealing sliding sleeve, and the sealing sliding sleeve is arranged between the spring and the inner shell.

[0014] Further, a key strip is fixed on the sealing sliding sleeve, a key groove is arranged on the valve rod, the free end of the key strip is connected with the key groove in a matched mode, and the free end of the key strip can slide along the key groove.

[0015] Further, a spring tray is sleeved on the valve rod, and the spring tray is located between the spring and the roller.

[0016] Further, the valve core is a conical body, and the valve port is a reverse conical port matched with the conical body.

[0017] Further, the cam comprises two semicircular arc surfaces with different radii.

[0018] Further, the oil injection port is arranged at the front end of the shell, the oil injection cavity is connected with the front end of the shell through a bolt structure, and the oil injection cavity is coaxially arranged with the rack.

[0019] Further, the valve port extends to the shell and is connected with a medium flow pipe.

[0020] The beneficial effects of the utility model lie in:

[0021] The valve body structure for the reciprocating pump solves the problems of poor sealing of the valve body, easy jamming of the valve core, wear of the valve core and selection of the valve type according to the medium, and realizes the technical effects of tight sealing of the valve body, no jamming of the valve body, crushing of the medium particles, stable guiding of the valve core and wide use of the valve body. BRIEF DESCRIPTION OF DRAWINGS

[0022] Figure 1 is a sectional view of a valve body structure for a reciprocating pump in the embodiment of the application;

[0023] Figure 2 is a detailed schematic view of an internal mechanism of a valve body structure for a reciprocating pump in the embodiment of the application;

[0024] Figure 3 is a perspective view of a gear set in the embodiment of the application;

[0025] Figure 4 is a rear view of the gear set in the embodiment of the application;

[0026] Figure 5 is a perspective view of a valve body assembly located at the upper part in the embodiment of the application;

[0027] Figure 6 is a perspective view of a valve rod mechanism located at the lower part in the embodiment of the application;

[0028] Figure 7 is a use state view of a valve body structure for a reciprocating pump in the embodiment of the application.

[0029] In the figure: 1-motor; 2-worm; 3-turbine; 4-coaxial eccentric wheel; 5-plunger; 6-outer shell; 7-inner shell; 8-large-diameter curved surface; 9-small-diameter curved surface; 10-diaphragm; 11-diaphragm connecting rod bolt; 12-sealing rubber sleeve; 13-toothed rod; 14-valve core; 15-lower medium flow pipe; 16-valve rod; 17-spring; 18-full gear; 19-intermediate gear; 20-incomplete gear; 21-cover plate; 22-upper medium flow pipe; 23-cam; 24-oil injection cavity; 25-one-way valve; 26-nozzle; 27-oil injection channel; 28-sealing sliding sleeve; 29-key bar; 30-spring tray; 31-roller; 32-key groove. DETAILED DESCRIPTION

[0030] To make the purpose, technical scheme and advantages of the embodiments of the application clearer, the technical scheme in the embodiments of the application will be described clearly and completely below with reference to the drawings in the embodiments of the application. Obviously, the described embodiments are part of the embodiments of the application, rather than all the embodiments of the application. The components of the embodiments of the application described and shown in the drawings can be arranged and designed in various different configurations.

[0031] Therefore, the following detailed description of the embodiments of the application provided in the drawings is not intended to limit the scope of the claimed application, but merely represents selected embodiments of the application. Based on the embodiments in the application, all other embodiments obtained by those of ordinary skill in the art without creative labor fall within the scope of protection of the application.

[0032] It should be noted that: similar reference numbers and letters represent similar items in the following drawings, so once an item is defined in one drawing, it does not need to be further defined and explained in subsequent drawings.

[0033] In the description of the application, it should be understood that the terms "upper", "lower", "inner", "outer", "left", "right" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, or the orientation or positional relationship commonly used when the product of the application is used, or the orientation or positional relationship commonly understood by those skilled in the art, and are only for the convenience of describing the application and simplifying the description, and do not indicate or imply that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the application.

[0034] In addition, the terms "first", "second" and the like are only used to distinguish the description, and cannot be understood as indicating or implying relative importance.

[0035] In the description of the application, it should also be noted that, unless otherwise explicitly specified and limited, the terms "provided", "connected" and the like should be broadly understood, for example, "connected" can be fixedly connected, or can be detachably connected, or integrally connected; can be mechanically connected, or electrically connected; can be directly connected, or indirectly connected through an intermediate medium, or the communication between two elements inside. For those of ordinary skill in the art, the specific meaning of the above terms in the application can be understood according to the specific circumstances.

[0036] The specific embodiments of the application will be described in detail below with reference to the drawings.

[0037] As shown in the drawings, a valve body structure for a reciprocating pump comprises: Figures 1-4

[0038] The shell comprises an inner shell 7 and an outer shell 6, the outer shell 6 has two symmetrical valve ports and a diaphragm port for mounting a diaphragm 10, and an oil injection port for connecting an oil injection structure;

[0039] ​The oil injection mechanism comprises an oil injection cavity 24, a one-way valve 25 and an oil injection channel 27. The oil injection cavity 24 is installed at the oil injection port. The oil injection channel 27 is arranged inside the inner shell 7 and communicates with the inside of the inner shell 7. The oil injection channel 27 penetrates the oil injection cavity 24. The one-way valve 25 is arranged at the communication position of the oil injection channel 27 and one side of the oil injection cavity 24. The port of the other side of the oil injection channel 27 of the oil injection cavity 24 is connected with the oil injection structure.

[0040] The gear set comprises an incomplete gear 20 and a full gear 18. The incomplete gear 20 is coaxially connected with the full gear 18.

[0041] The valve body assembly comprises a valve rod 16, a valve core 14 and a roller 31. The valve core 14 and the roller 31 are arranged at two ends of the valve rod 16 respectively. The spring 17 is sleeved on the valve rod 16 and is located between the valve core 14 and the roller 31.

[0042] The toothed rod 13 is arranged inside the inner shell 7. One end of the toothed rod 13 is movably inserted into the oil injection port. The other end of the toothed rod 13 penetrates the inner shell 7 and is used for being connected with the diaphragm 10. A set of gear sets and valve body assemblies are arranged on both sides of the toothed rod 13 respectively. The gear part of the incomplete gear 20 is used for being engaged with the gear rack on the toothed rod 13. The two full gears 18 are engaged and connected through the intermediate gear 19. The intermediate gear 19 is coaxially connected with the cam 23. The two valve rods 16 are respectively penetrated through the inner shell 7 so that the valve core 14 is arranged in cooperation with the corresponding valve port. The spring 17 is located inside the inner shell 7. When the large-diameter curved surface 8 of the cam 23 is in contact with the roller 31, the spring 17 is compressed and the valve core 14 closes the valve port. When the small-diameter curved surface 9 of the cam 23 is in contact with the roller 31, the spring 17 releases the elastic force and the valve core 14 is opened.

[0043] As shown in FIG. 1, Figure 1 In an embodiment, the oil injection channel 27 comprises a first channel and a second channel. One end of the first channel and one end of the second channel are connected with the oil injection cavity 24. The other end of the first channel and the other end of the second channel are connected with the inner shell 7. The one-way valve 25 is arranged at the connection position of one end of the first channel and the oil injection cavity 24. The oil injection structure is the nozzle 26 arranged at the port of the other end of the second channel.

[0044] As shown in FIG. 1, Figure 1 In an embodiment, the sealing sliding sleeve 28 is movably sleeved on the valve rod 16. The sealing sliding sleeve 28 is arranged between the spring 17 and the inner shell 7.

[0045] As shown in FIG. 1, Figure 2 , Figure 5 and Figure 6As shown, in one embodiment, a key strip 29 is fixed on the sealing sleeve 28, and a keyway 32 is provided on the valve stem 16. The free end of the key strip 29 is connected to the keyway 32, and the free end of the key strip 29 can slide along the keyway 32.

[0046] like Figure 2 , Figure 5 and Figure 6 As shown, in one embodiment, a spring tray 30 is fitted onto the valve stem 16, and the spring tray 30 is located between the spring 17 and the roller 31.

[0047] like Figure 1 As shown, in one embodiment, the valve core 14 is a conical body, and the valve port is an inverted conical port that mates with the conical body.

[0048] like Figure 2 As shown, in one embodiment, the cam 23 includes two semi-circular arc surfaces with different radii.

[0049] like Figure 1 As shown, in one embodiment, the oil inlet is located at the front end of the housing, the oil filling chamber 24 is connected to the front end of the housing by a bolt structure, and the oil filling chamber 24 is coaxially arranged with the toothed rod 13.

[0050] like Figure 1 As shown, in one embodiment, the valve port extends to the outside of the housing and is connected to a medium flow pipe.

[0051] Combination Figures 1-7 As shown, motor 1 drives worm gear 2 and turbine 3 to rotate. Turbine 3 drives plunger 5, diaphragm 10, and rack 13 to reciprocate linearly via coaxial eccentric wheel 4. During the return stroke, rack 13 drives the lower incomplete gear to rotate clockwise, simultaneously driving the upper full gear to rotate clockwise, the intermediate gear 19 to rotate counterclockwise, and the cam 23 to rotate counterclockwise. During the return stroke, the large-diameter curved surface 8 of cam 23 contacts the upper roller, pushing the roller upward. Spring 17 is compressed, the upper valve core closes, and the small-diameter surface 8 of cam 23... The curved surface 9 contacts the lower roller, releasing the spring force of the lower valve stem, causing the lower valve stem to move upward and the lower valve core to open. During this process, the negative pressure generated by the diaphragm contraction draws the medium into the cavity through the opened lower valve core, completing one return stroke. After the return stroke, the rack 13 continues to be pushed by the eccentric wheel, and the large-diameter curved surface 8 of the cam 23 pushes the lower roller downward, closing the lower valve core. The small-diameter curved surface 9 of the cam 23 contacts the upper roller, releasing the spring force of the upper valve stem, causing the upper valve stem to open the upper valve core downward. During this process, the positive pressure generated by the diaphragm extension discharges the medium from the cavity through the opened upper valve core. One extension and retraction cycle of the plunger 5 completes one intake and discharge of the medium.

[0052] The above merely describes preferred embodiments of the present application, and it should be noted that, for those skilled in the art, without departing from the technical principles of the present application, a number of improvements and refinements can be made, and these improvements and refinements should also be considered within the protection scope of the present application.

Claims

1. A valve body structure for a reciprocating pump, characterized by, include: The housing includes an inner shell and an outer shell. The outer shell has two symmetrically arranged valve ports, a diaphragm port for installing a diaphragm, and an oil injection port for connecting to the oil injection structure. The oil injection mechanism includes an oil injection chamber, a one-way valve, and an oil injection channel. The oil injection chamber is installed at the oil injection port. The oil injection channel is located inside the inner shell and communicates with the inner shell. The oil injection channel passes through the oil injection chamber. The one-way valve is located at the connection between the oil injection channel and one side of the oil injection chamber. The port of the oil injection channel on the other side of the oil injection chamber is connected to an oil spraying structure. Gear sets, which include incomplete gears and full gears, with the incomplete gears and full gears being coaxially linked. The valve body assembly includes a valve stem, a valve core, a roller, and a spring. The valve core and the roller are respectively disposed at both ends of the valve stem, and the spring is sleeved on the valve stem and limited between the valve core and the roller. The rack is located inside the inner housing. One end of the rack can be inserted into the oil inlet, and the other end passes through the inner housing and is used to connect with the diaphragm. Each side of the rack is equipped with a set of gears and a valve body assembly. The gear portion of the incomplete gear is used to mesh with the rack on the rack. The upper and lower complete gears are connected by an intermediate gear. A cam is coaxially linked to the intermediate gear. The valve stems have valve cores at one end that pass through the inner housing so that the valve cores are matched with the corresponding valve ports. The spring is located inside the inner housing. When the large-diameter curved surface of the cam contacts the roller, the spring is compressed and the valve core closes the valve port. When the small-diameter curved surface of the cam contacts the roller, the spring force is released and the valve core opens.

2. A valve structure for a reciprocating pump according to claim 1, wherein The oil injection channel includes a first channel and a second channel. One end of the first channel and one end of the second channel are connected to the oil injection chamber. The other end of the first channel and the other end of the second channel are connected to the inner shell. A one-way valve is set at the connection between one end of the first channel and the oil injection chamber. The oil injection structure is a nozzle set at the other end of the second channel.

3. The valve structure for a reciprocating pump according to claim 1, wherein A sealing sleeve is movably fitted on the valve stem, and the sealing sleeve is located between the spring and the inner shell.

4. A valve structure for a reciprocating pump according to claim 3, wherein A key bar is fixed on the sealing sleeve, and a keyway is provided on the valve stem. The free end of the key bar is connected to the keyway, and the free end of the key bar can slide along the keyway.

5. The valve structure for a reciprocating pump according to claim 1 or 3, wherein A spring tray is fitted onto the valve stem, and the spring tray is located between the spring and the roller.

6. The valve structure for a reciprocating pump according to claim 1, wherein The valve core is a conical body, and the valve port is an inverted conical port that mates with the conical body.

7. The valve structure for a reciprocating pump according to claim 1, wherein The cam consists of two semi-circular arc surfaces with different radii.

8. The valve structure for a reciprocating pump according to claim 1, wherein The oil inlet is located at the front end of the housing, and the oil filling chamber is connected to the front end of the housing by bolts. The oil filling chamber is coaxial with the rack.

9. The valve structure for a reciprocating pump according to claim 1, wherein The valve port extends to the outside of the housing and is connected to a medium flow pipe.

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