Pressure release valve for pesticide sprayer

Abstract

The utility model discloses a pressure relief valve for a pesticide spraying machine, which belongs to the technical field of pressure relief valves and comprises a pressure relief valve body, a connecting pipe, a screw and a pressure relief spring, the connecting pipe is arranged at the inlet end of the pressure relief valve body and used for being connected with a pesticide spraying plunger pump, the screw is arranged at one end of the pressure relief valve body, the other end of the screw is in threaded connection with a threaded head, and the pressure relief spring is arranged in the threaded head. The pressure relief spring is arranged on the outer wall of the screw in a sleeving mode and located between the threaded head and the pushing end of the pressure relief valve body, the outer wall of the threaded head and the outer wall of the pressure relief spring are sleeved with a pressure adjusting handle, and a locking assembly used for fixing the protective sleeve is arranged on the outer wall of the threaded head. The locking assembly comprises a pressing block arranged on the outer wall of the thread head in an inserted mode and a connecting rod located in the thread head and fixedly connected with one end of the pressing block, the pressure relief spring is conveniently cleaned, meanwhile, the pressure value does not need to be adjusted again during reassembly, and the workload is reduced.

Description

TECHNICAL FIELD

[0001] The utility model relates to pressure relief valve technical field, concretely is a kind of pressure relief valve for spraying machine. BACKGROUND

[0002] Pressure relief valve is also named safety valve, can be automatically opened and closed according to the working pressure of system, generally installed on the equipment or pipeline of closed system to protect system safety.When the pressure in equipment or pipeline exceeds the set pressure of pressure relief valve, it is automatically opened to release pressure, ensure that the pressure of medium in equipment and pipeline is below the set pressure, protect equipment and pipeline, prevent accidents.

[0003] The current automatic adjustable spring type pressure relief valve for agricultural spraying automatically adjusts the cooperation between valve body, valve rod, spring, screw rod and screw rod sleeve, changes the previous manual mode, reduces workload, and can adjust the take-off pressure of spring type, the screw rod sleeve is arranged outside the spring to protect the spring, prevent dust and impurities from entering to affect the normal work of spring, and is suitable for 48-72V agricultural spraying machine.

[0004] However, when cleaning the spring of the existing pressure relief valve, the shell wrapping and limiting the installation spring needs to be disassembled, which will lose the extrusion of the spring, and when reassembling, the pressure value set by the spring needs to be adjusted again, increasing the workload, so it is necessary to provide a spraying machine pressure relief valve which is convenient to clean and assemble. UTILITY MODEL CONTENTS

[0005] The utility model aims at providing a kind of pressure relief valve for spraying machine to at least partly solve the above technical problems, the take-off pressure of spring to valve rod does not change after the shell wrapping and limiting spring is disassembled, it is convenient to clean, and reduce installation workload.

[0006] To achieve the above object, the utility model provides the following technical scheme: including pressure relief valve body, connecting pipe, screw rod, pressure relief spring, the connecting pipe is arranged at the import end of pressure relief valve body for connecting spraying plunger pump, the screw rod is arranged at one end of the pressure relief valve body, the other end of the screw rod is threadedly connected with threaded head, the pressure relief spring is sleeved on the outer wall of screw rod between threaded head and the pushing end of pressure relief valve body, the threaded head and the outer wall of pressure relief spring are sleeved with protective sleeve, the outer wall of threaded head is provided with locking assembly for fixing the protective sleeve;

[0007] The locking assembly includes press block inserted on the outer wall of threaded head, connecting rod fixedly connected with press block one end in the interior of threaded head, sliding block fixedly connected with connecting rod and arranged in the inner wall of threaded head, fixed plate inserted in the interior of pressure regulating handle through threaded head and fixedly arranged on the other end of connecting rod, and reset spring arranged in the interior of threaded head for pushing sliding block reset.

[0008] Preferably, the bottom of the connecting pipe is provided with three communicating water inlets for connecting with the water outlet of the pesticide injection plunger pump, and the middle part of the threaded head is provided with a partition plate dividing the threaded head into two parts.

[0009] Preferably, the threaded head and the outer wall of the pressure regulating handle are both provided with arrows, and when the two arrows are symmetrical to each other, one end of the fixing plate is inserted into the inner part of the pressure regulating handle.

[0010] Preferably, the threaded head is internally provided with a first through hole matched with the connecting rod, the connecting rod is movable in the first through hole, the outer wall of the threaded head is both provided with a second through hole, and one end of the fixing plate extends outward through the second through hole.

[0011] Preferably, the connecting rod is in U shape, and the two connecting rods are symmetrically distributed.

[0012] Preferably, the threaded head is internally provided with a sliding groove matched with the sliding block, one end of the sliding block is limited to move in the sliding groove, and the reset spring is fixedly connected with the edge of the sliding block in the sliding groove.

[0013] Compared with the prior art, the utility model has the beneficial effects that: when the utility model is used, the two pressing blocks are pressed towards the inside of the threaded head when the pressure relief spring is cleaned, the two connecting rods drive the two fixing plates to separate from the inside of the pressure regulating handle, the pressure regulating handle is slid towards the outer end of the threaded head, the pressure regulating handle can be disassembled from the threaded head, the threaded head does not need to be disassembled, the pressure relief spring is kept extruded, the pressure relief spring is cleaned at the same time, and the pressure value does not need to be adjusted again when reassembling, thereby reducing the workload. BRIEF DESCRIPTION OF DRAWINGS

[0014] In order to more clearly illustrate the technical scheme of the embodiments of the utility model, the following will briefly introduce the drawings needed to be used in the embodiment description, and obviously, the drawings in the following description are only some embodiments of the utility model, and for those skilled in the art, other drawings can also be obtained according to these drawings without creating labor.

[0015] Figure 1 It is the overall structure of the embodiment three-dimensional schematic view;

[0016] Figure 2 It is the overall three-dimensional structure schematic view of the embodiment protective sleeve disassembly;

[0017] Figure 3 It is the main view cross-sectional structure schematic view of the embodiment;

[0018] Figure 4 It is the threaded head overhead cross-sectional structure schematic view of the embodiment.

[0019] The components represented by the reference numbers in the drawings are listed as follows:

[0020] 1, pressure relief valve body; 2, connecting pipe; 4, screw rod; 5, threaded head; 51, arrow; 52, sliding groove; 53, first through hole; 54, second through hole; 6, pressure relief spring; 7, pressure regulating handle; 8, locking assembly; 81, pressing block; 82, connecting rod; 83, fixed plate; 84, sliding block; 85, reset spring. DETAILED DESCRIPTION

[0021] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0022] Please refer to Figures 1-4 The present application provides a technical solution: a pressure relief valve for a pesticide spraying machine, comprising a pressure relief valve body 1, a connecting pipe 2, a screw rod 4, and a pressure relief spring 6. The connecting pipe 2 is arranged at the inlet end of the pressure relief valve body 1 for connecting a pesticide plunger pump. The screw rod 4 is arranged at one end of the pressure relief valve body 1. A threaded head 5 is threadedly connected to the other end of the screw rod 4. The pressure relief spring 6 is sleeved on the outer wall of the screw rod 4 between the threaded head 5 and the pushing end of the pressure relief valve body 1. A pressure regulating handle 7 is sleeved on the outer wall of the threaded head 5. The outer wall of the threaded head 5 is provided with a locking assembly 8 for fixing the pressure regulating handle 7.

[0023] The locking assembly 8 comprises a pressing block 81 inserted on the outer wall of the threaded head 5, a connecting rod 82 fixedly connected to one end of the pressing block 81 inside the threaded head 5, a sliding block 84 slidingly arranged on the inner wall of the threaded head 5 and fixedly connected to the connecting rod 82, a fixed plate 83 fixedly arranged on the other end of the connecting rod 82 and inserted into the pressure regulating handle 7 through the threaded head 5, and a reset spring 85 arranged in the threaded head 5 for pushing the sliding block 84 to reset.

[0024] The adjustable automatic pressure relief valve is a spring type automatic pressure relief valve. A steel ball arranged inside the pressure relief valve is sealed at the pressure inlet end of the pressure relief valve. When the pressure inside the pump body reaches a value higher than the set value of the pressure relief valve, the pressure pushes the steel ball and the connected valve rod to jump up, so that the excess pressure is discharged through the pressure discharge pipe of the pressure relief valve. The threaded head 5 threadedly connected to one end of the screw rod 4 can adjust the pressure of the pressure relief spring 6 between the threaded head 5 and the pushing end of the pressure relief valve body 1.

[0025] The pressure regulating handle 7 is arranged between the threaded head 5 and the pressure relief valve body 1 to protect the pressure relief spring 6. When the threaded head 5 is fixed, the pressure of the pressure relief spring 6 on the valve rod and the steel ball of the pressure relief valve body 1 can be adjusted by rotating the pressure regulating handle 7, and the pressure value of the pressure relief valve body 1 is adjusted. When the pressure relief spring 6 needs to be cleaned, the two pressing blocks 81 are pressed towards the inside of the threaded head 5, so that the two connecting rods 82 drive the two fixed plates 83 to be separated from the inside of the pressure regulating handle 7, and the pressure regulating handle 7 is slid to the outer end of the threaded head 5. The pressure regulating handle 7 can be disassembled from the threaded head 5, so that the pressure relief spring 6 arranged on the outer wall of the screw rod 4 is exposed. The threaded head 5 does not need to be disassembled, and the extrusion of the pressure relief spring 6 is maintained.

[0026] Referring to Figure 1 and Figure 4 In some embodiments, three water inlets are arranged at the bottom of the connecting pipe 2 and are communicated with each other. The water inlets are used to be connected with the water outlet of the pesticide injection plunger pump. The middle part of the threaded head 5 is provided with a partition plate which divides the threaded head 5 into two parts.

[0027] The three water inlets arranged at the bottom of the connecting pipe 2 are used to be connected with the water pipe of the pesticide injection plunger pump. The partition plate arranged at the middle part of the threaded head 5 separates the threaded connection part of the screw rod 4 and the threaded head 5 from the locking assembly 8, and they do not affect each other during the connection work.

[0028] Referring to Figure 2 In some embodiments, the outer wall of the threaded head 5 and the pressure regulating handle 7 is provided with an arrow 51. When the two arrows 51 are symmetrical to each other, one end of the fixed plate 83 is inserted into the inside of the pressure regulating handle 7.

[0029] The arrow 51 arranged on the outer wall of the threaded head 5 and the pressure regulating handle 7 is convenient for the groove used for fixing the pressure regulating handle 7 to be opposite to the fixed plate 83, so that the pressure regulating handle 7 can be quickly assembled on the threaded head 5.

[0030] Referring to Figure 2 and Figure 4 In some embodiments, the first through hole 53 matched with the connecting rod 82 is arranged in the inside of the threaded head 5. The connecting rod 82 is movable in the first through hole 53. The second through hole 54 is arranged on the outer wall of the threaded head 5. One end of the fixed plate 83 extends outward through the second through hole 54.

[0031] The first through hole 53 arranged in the inside of the threaded head 5 is used for the movement of the connecting rod 82 in the inside of the threaded head 5. The second through hole 54 arranged in the inside of the threaded head 5 is used for the end of the fixed plate 83 to extend outward through the threaded head 5.

[0032] Referring to Figure 4 In some embodiments, the connecting rod 82 is in U-shaped shape, and the two connecting rods 82 are distributed symmetrically to each other.

[0033] The connecting rod 82 is in U-shaped shape, and is used for fixing the fixed plate 83 and the pressing block 81 in a direction, facilitating the movement of the pressing block 81 and the fixed plate 83 in a direction.

[0034] Referring to Figure 2 And Figure 4 In some embodiments, a sliding groove 52 matched with the sliding block 84 is formed in the interior of the threaded head 5, one end of the sliding block 84 is limited to move in the sliding groove 52, and the reset spring 85 is fixedly connected with the edge of the sliding block 84 in the sliding groove 52.

[0035] The sliding groove 52 formed in the interior of the threaded head 5 is used for the parallel movement of the sliding block 84 on the inner wall of the threaded head 5, the relief spring 6 is fixedly connected with the sliding block 84 in the sliding groove 52, when the two pressing blocks 81 move to the interior of the threaded head 5, the reset spring 85 is extruded to be together, the sliding block 84 is pushed to reset, and the connecting rod 82 drives the fixed plate 83 and the pressing block 81 to reset.

[0036] In the description of the present application, it should be understood that the terms "coaxial", "bottom", "one end", "top", "middle", "the other end", "upper", "one side", "top", "inner", "front", "central", "both ends" and the like indicate the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present 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 a limitation of the present application.

[0037] In the present application, unless otherwise explicitly specified and limited, the terms "mounting", "setting", "connecting", "fixing", "threading" and the like should be understood in a broad sense, for example, can be fixedly connected, or can be detachably connected, or can be integrated; can be mechanically connected, or can be electrically connected; can be directly connected, or can be indirectly connected through an intermediate medium; can be the communication or interaction relationship between two elements, unless otherwise explicitly limited, the above-mentioned terms in the present application can be understood according to the specific meaning of the above-mentioned terms in the present application according to the specific situation.

[0038] Although the embodiments of the present application have been shown and described, it can be understood by those skilled in the art that various changes, modifications, replacements and variations can be made to these embodiments without departing from the principles and spirits of the present application, and the scope of the present application is defined by the appended claims and their equivalents.

Claims

1. A pressure relief valve for a sprayer, comprising a pressure relief valve body (1), a connecting pipe (2), a screw (4), and a pressure relief spring (6), wherein the connecting pipe (2) is disposed at the inlet end of the pressure relief valve body (1) for connecting to a spraying plunger pump, characterized in that: Screw rod (4) is arranged in one end of the pressure relief valve body (1), the other end of the screw rod (4) is threadedly connected with the threaded head (5), the pressure relief spring (6) is sleeved on the outer wall of the screw rod (4) between the threaded head (5) and the pushing end of the pressure relief valve body (1), the threaded head (5) and the outer wall of the pressure relief spring (6) are sleeved with the pressure regulating handle (7), the outer wall of the threaded head (5) is provided with a locking assembly (8) for fixing the pressure regulating handle (7); The locking assembly (8) includes a pressing block (81) inserted on the outer wall of the threaded head (5), a connecting rod (82) fixedly connected with one end of the pressing block (81) in the threaded head (5), a sliding block (84) slidingly arranged on the inner wall of the threaded head (5) and fixedly connected with the connecting rod (82), a fixed plate (83) fixedly arranged on the other end of the connecting rod (82) and inserted in the pressure regulating handle (7) through the threaded head (5), and a reset spring (85) arranged in the threaded head (5) for pushing the sliding block (84) to reset.

2. The pressure relief valve for a pesticide spraying machine according to claim 1, wherein: The connecting pipe (2) is provided with three communicating water inlets at the bottom, the water inlets are used for being connected with the water outlet of the pesticide plunger pump, and the threaded head (5) is provided with a partition plate dividing it into two parts.

3. The pressure relief valve for a pesticide spraying machine according to claim 1, wherein: The threaded head (5) and the outer wall of the pressure regulating handle (7) are provided with arrows (51), when the two arrows (51) are symmetrical to each other, one end of the fixed plate (83) is inserted in the pressure regulating handle (7).

4. The pressure relief valve for a pesticide spraying machine according to claim 1, wherein: The threaded head (5) is provided with a first through hole (53) matched with the connecting rod (82) in the interior, the connecting rod (82) is movable in the first through hole (53), and the outer wall of the threaded head (5) is provided with two second through holes (54), one end of the fixed plate (83) extends outward through the second through hole (54).

5. The pressure relief valve for a pesticide spraying machine according to claim 4, wherein: The connecting rod (82) is U-shaped, and the two connecting rods (82) are symmetrically distributed.

6. The pressure relief valve for a pesticide spraying machine according to claim 1, wherein: The threaded head (5) is provided with a sliding groove (52) matched with the sliding block (84) in the interior, one end of the sliding block (84) is limited to move in the sliding groove (52), and the reset spring (85) is fixedly connected with the edge of the sliding block (84) in the sliding groove (52).

Images