Vertical plunger pump of spraying machine

Abstract

The utility model belongs to the technical field of plunger pumps, and particularly relates to a vertical plunger pump of a coating machine. A plunger hole and a material suction valve hole are formed in the pump body in the vertical direction, a discharging valve hole communicated with the plunger hole, a pressure relief valve hole communicated with the discharging valve hole and a pressure control valve hole are further formed in the pump body, a plunger rod is arranged in the plunger hole, the upper end of the plunger rod extends out of the pump body, a material suction valve assembly is arranged on the material suction valve hole, and the pressure control valve hole is communicated with the pressure relief valve hole. A discharging valve assembly is arranged on the discharging valve hole, a pressure relief valve assembly is arranged on the pressure relief hole, a pressure control valve is arranged on the pressure control valve hole, the plunger rod is connected with the plunger hole in a sealed mode, the material suction valve assembly comprises a material suction one-way valve body, a material suction hole is formed in the material suction one-way valve body, and a first valve seat is arranged at the upper end of the material suction hole. A first steel ball is movably arranged on the first valve seat; the vertical structure is adopted, the material suction valve is vertically arranged, the first steel ball can be automatically reset and sealed by means of the gravity of the first steel ball, and the structure is simple.

Description

Technical field:

[0001] The utility model belongs to the technical field of plunger pumps, in particular to a vertical plunger pump for a spraying machine. Background technology:

[0002] Spraying machine is a common spraying tool in our daily life, in which the plunger pump is an important component; the plunger pump is equipped with a suction valve for controlling the work. The suction valve includes a steel ball. The existing suction valve is horizontally placed, so the reset of the steel ball requires the cooperation of a reset spring. Summary of the invention:

[0003] The utility model aims to provide a vertical plunger pump for a spraying machine, in which a steel ball of a suction valve does not need a reset spring and can automatically reset the seal under the action of its own gravity.

[0004] The utility model is achieved in this way:

[0005] A vertical plunger pump for a spraying machine comprises a pump body, in which a plunger hole and a suction valve hole are arranged in a vertical direction, the plunger hole and the suction valve hole are arranged coaxially and connected to each other, the pump body is also provided with a discharge valve hole connected to the plunger hole and the suction valve hole, a pressure relief valve hole and a pressure control valve hole connected to the discharge valve hole, a plunger rod is arranged in the plunger hole, the upper end of the plunger rod extends out of the pump body, a suction valve assembly is arranged on the suction valve hole, a discharge valve assembly is arranged on the discharge valve hole, a pressure relief valve assembly is arranged on the pressure relief hole, a pressure control valve is arranged on the pressure control valve hole, the plunger rod is sealingly connected to the plunger hole, the suction valve assembly comprises a suction check valve body, a suction hole is arranged in the suction check valve body, a first valve seat is arranged at the upper end of the suction hole, and a first steel ball is arranged on the first valve seat.

[0006] In the above-mentioned vertical plunger pump of a spray machine, the upper end of the suction valve hole is a neck portion, a first step surface is formed between the neck portion and the suction valve hole, a first spring seat is arranged above the first steel ball, one end of the first return spring is topped on the first spring seat, and the other end is topped on the first steel ball, and the first spring seat abuts against the first step surface.

[0007] In the above-mentioned vertical plunger pump of a spray machine, the plunger rod and the plunger hole are sealed and connected by a sealing assembly, and the sealing assembly includes a sealing support ring 1, a first V-shaped sealing ring, a second V-shaped sealing ring, and a sealing support ring 2. The first V-shaped sealing ring and the second V-shaped sealing ring are stacked at intervals, and a sealing support ring 2 is stacked above the top first V-shaped sealing ring or the second V-shaped sealing ring.

[0008] In the above-mentioned vertical plunger pump for a spraying machine, the first V-shaped sealing ring is a UPE V-shaped sealing ring, and the second V-shaped sealing ring is a fluororubber V-shaped sealing ring or a cowhide V-shaped sealing ring.

[0009] In the vertical plunger pump of the sprayer described above, an upper guide sleeve is sleeved on the plunger rod above the sealing assembly, and the upper guide sleeve and the sealing assembly are axially limited by a locking nut screwed to the upper end of the plunger hole.

[0010] In the above-mentioned vertical plunger pump for a sprayer, a reset hole is provided on the pump body and on one side of the first steel ball, and a reset component for driving the first steel ball to reset is provided on the reset hole, and the outer end of the reset hole is low and the inner end is high.

[0011] In the above-mentioned vertical plunger pump of a spray machine, the reset assembly includes a reset rod, a locking nut is mounted on the reset rod, a step hole is arranged in the locking nut, the step hole includes a second step surface, a limiting cam is arranged on the reset rod, one end of the reset rod is passed through the step hole, and a second reset spring is mounted on the reset rod, one end of the second reset spring is pressed against the bottom of the reset hole, and the other end is pressed against the limiting cam of the reset rod, the limiting cam abuts against the second step surface of the locking nut, the other end of the reset rod is connected to a pressing head, and the inner end of the reset rod is extended into the plunger hole to push the first steel ball to reset when an external force acts on the pressing head.

[0012] In the above-mentioned vertical plunger pump of a spray machine, the discharge valve assembly includes a discharge valve body, the discharge valve body is provided with a water outlet hole axially penetrating the discharge valve body, the water outlet hole is a step hole, the step hole includes a third step surface, a second valve seat is provided at the inner end of the discharge valve body, a first valve stem and a second steel ball are provided between the second valve seat and the third step surface, and the first valve stem abuts the second steel ball against the second valve seat through a third return spring.

[0013] In the above-mentioned vertical plunger pump for a spraying machine, more than one water through hole is circumferentially distributed on the side wall of the valve body of the discharge valve, and the water through hole is connected with the pressure control valve hole and the pressure relief valve hole through the water through hole.

[0014] In the above-mentioned vertical plunger pump of a spray machine, the pressure control valve includes a second valve stem, on which a valve sleeve is mounted, the lower end of the valve sleeve is screwed into the pressure control valve hole, the pressure control valve body is mounted on the valve sleeve, a pressure regulating cap is screwed onto the pressure control valve body, an upper spring seat and a lower spring seat are arranged between the pressure control valve body and the pressure regulating cap, one end of the third return spring is pressed against the upper spring seat, and the other end is pressed against the lower spring seat, the upper end of the second valve stem is connected to the lower spring seat, a micro switch is arranged on the pressure control valve body, and the lower spring seat acts on the micro switch, when the pressure in the pump body is higher than the set pressure, the pressure drives the second valve stem upward, thereby driving the lower spring seat upward, thereby causing the micro switch to generate an electrical signal.

[0015] The outstanding advantages of the utility model compared with the prior art are:

[0016] 1. The utility model adopts a vertical structure, and the suction valve is vertically set. The first steel ball can automatically reset and seal by its own gravity. At this time, the reset spring can be set or not, and the structure is simple;

[0017] 2. Only one set of sealing components is arranged on the plunger rod of the utility model, which has a simple structure but good sealing effect. The sealing component forms a segmented structure through the stacked sealing support ring 1, UPE V-shaped sealing ring, fluororubber V-shaped sealing ring and sealing support ring 2, which reduces the contact area when the plunger rod moves, reduces friction, and prolongs the service life;

[0018] 3. When the first steel ball is stuck, the reset assembly provided in the utility model pushes the first steel ball to allow the first steel ball to move flexibly, thereby ensuring the normal operation of the machine;

[0019] 4. The utility model has stable performance and high reliability and can produce stable high voltage output. Description of the drawings:

[0020] Figure 1 It is an explosion schematic diagram of the utility model;

[0021] Figure 2 It is a cross-sectional view of the utility model;

[0022] Figure 3 yes Figure 2 AA section view;

[0023] Figure 4 It is a schematic diagram of a pump body of the present utility model.

[0024] In the figure: 1. pump body; 2. plunger hole; 3. suction valve hole; 4. discharge valve hole; 5. plunger rod; 6. suction valve assembly; 7. discharge valve assembly; 8. pressure relief valve assembly; 9. pressure control valve; 10. suction check valve body; 11. suction hole; 12. first valve seat; 13. first steel ball; 14. first step surface; 15. first spring seat; 16. first return spring; 17. sealing support ring; 18. first V-shaped sealing ring; 19. second V-shaped sealing ring; 20. sealing support ring II; 21. upper guide sleeve; 22. locking nut; 23. , reset hole; 24, reset rod; 25, locking nut; 26, second step surface; 27, second reset spring; 28, limiting convex edge; 29, pressing head; 30, discharge valve body; 31, water outlet; 32, third step surface; 33, second valve seat; 34, first valve stem; 35, second steel ball; 36, third reset spring; 37, second valve stem; 38, valve sleeve; 39, pressure control valve body; 40, pressure regulating cap; 41, upper spring seat; 42, lower spring seat; 43, fourth reset spring; 44, micro switch; 45, water hole. Specific implementation method:

[0025] The present invention is further described below with reference to specific embodiments. Figure 1 —4:

[0026] The utility model provides a vertical plunger pump for a spraying machine, the vertical plunger pump for the spraying machine comprises a pump body 1, a plunger hole 2 and a suction valve hole 3 are arranged in the pump body 1 along the vertical direction, the plunger hole 2 and the suction valve hole 3 are arranged coaxially and communicated with each other, a discharge valve hole 4 connected with the plunger hole 2 and the suction valve hole 3, a pressure relief valve hole and a pressure control valve hole connected with the discharge valve hole 4 are also arranged on the pump body 1, a plunger rod 5 is arranged in the plunger hole 2, and the upper end of the plunger rod 5 extends out of the pump body 1 , a suction valve assembly 6 is provided on the suction valve hole 3, a discharge valve assembly 7 is provided on the discharge valve hole 4, a pressure relief valve assembly 8 is provided on the pressure relief hole, a pressure control valve 9 is provided on the pressure control valve hole, the plunger rod 5 is sealed and connected to the plunger hole 2, the suction valve assembly 6 includes a suction check valve body 10, a suction hole 11 is provided in the suction check valve body 10, a first valve seat 12 is provided at the upper end of the suction hole 11, and a first steel ball 13 is movably provided on the first valve seat 12. The plunger rod 5 is driven to reciprocate by a driving member, and the driving member is driven by a motor.

[0027] The utility model arranges the plunger hole 2 and the suction valve hole 3 in the vertical direction, that is, a vertical type. The first steel ball 13 can be automatically located on the first valve seat 12 by its own gravity without the action of a reset structure. The structure is simple and the performance is stable.

[0028] In order to further improve the performance, the utility model can also drive the reset of the first steel ball 13 through a reset structure, and the specific structure is as follows: the upper end of the suction valve hole 3 is a constricted neck, and a first step surface 14 is formed between the constricted neck and the suction valve hole 3. A first spring seat 15 is arranged above the first steel ball 13, and one end of the first reset spring 16 is topped on the first spring seat 15 and the other end is topped on the first steel ball 13, and the first spring seat 15 abuts against the first step surface 14.

[0029] The spring force of the first return spring 16 combined with the gravity of the first steel ball 13 enables the first steel ball 13 to be returned to its original position in time.

[0030] As mentioned above, the plunger rod 5 is sealed and connected to the plunger hole 2 through a sealing assembly, which includes a sealing support ring 17, a first V-shaped sealing ring 18, a second V-shaped sealing ring 19, and a sealing support ring 20. The first V-shaped sealing ring 18 and the second V-shaped sealing ring 19 are stacked at intervals, and a sealing support ring 20 is stacked above the top first V-shaped sealing ring 18 or the second V-shaped sealing ring 19. In this embodiment, two first V-shaped sealing rings 18 and three second V-shaped sealing rings 19 are stacked at intervals, and the sealing support ring 20 is stacked on the top first V-shaped sealing ring 18. The sealing assembly of the utility model can play an excellent sealing role and has a long service life.

[0031] Specifically, the first V-shaped sealing ring 18 is a UPE V-shaped sealing ring, and the second V-shaped sealing ring 19 is a fluororubber V-shaped sealing ring or a cowhide V-shaped sealing ring.

[0032] It should be noted that the UPE V-shaped sealing ring is made of ultra-high molecular polyethylene material, the fluororubber V-shaped sealing ring is made of fluororubber material, and the cowhide V-shaped sealing ring is made of cowhide material. The sealing support ring 17 and the sealing support ring 20 can be made of metal or plastic materials to play an auxiliary role.

[0033] An upper guide sleeve 21 is sleeved on the plunger rod 5 above the sealing assembly of the utility model. The upper guide sleeve 21 can reduce the friction of the plunger rod 5 during the reciprocating extension and contraction process. The upper guide sleeve 21 and the sealing assembly are axially limited by a locking nut 22 screwed to the upper end of the plunger hole 2.

[0034] When the first steel ball 13 is stuck under special circumstances, the utility model uses a reset component to push the first steel ball 13 so that the first steel ball 13 can move flexibly. A reset hole 23 is provided on the pump body 1 and on one side of the first steel ball 13. A reset component for driving the first steel ball 13 to reset is provided on the reset hole 23. The outer end of the reset hole 23 is low and the inner end is high.

[0035] Specifically, the reset assembly includes a reset rod 24, a locking nut 25 is sleeved on the reset rod 24, a step hole is arranged in the locking nut 25, the step hole includes a second step surface 26, a limiting convex edge is arranged on the reset rod 24, one end of the reset rod 24 is penetrated in the step hole, and a second reset spring 27 is sleeved on it, one end of the second reset spring 27 is pressed tightly against the bottom of the reset hole 23, and the other end is pressed tightly against the limiting convex edge 28 of the reset rod 24, the limiting convex edge 28 abuts against the second step surface 26 of the locking nut 25, and the other end of the reset rod 24 is connected to a pressing head 29, and the inner end of the reset rod 24 is extended into the plunger hole 2 to push the first steel ball 13 when an external force acts on the pressing head 29.

[0036] Furthermore, the discharge valve assembly 7 includes a discharge valve body 30, and the discharge valve body 30 is provided with a water outlet hole 31 axially penetrating the valve body, the water outlet hole 31 is a step hole, and the step hole includes a third step surface 32. A second valve seat 33 is provided at the inner end of the discharge valve body 30, and a first valve stem 34 and a second steel ball 35 are provided between the second valve seat 33 and the third step surface 32. The valve stem 34 abuts the second steel ball 35 against the second valve seat 33 through a third return spring 36.

[0037] In addition, the side wall of the discharge valve body 30 is provided with more than one water holes 36 distributed circumferentially, and the water holes 31 are connected with the pressure control valve hole and the pressure relief valve hole through the water holes 45. The pressure relief valve assembly 8 of the utility model can have a variety of structures, which will not be described in detail in the utility model. The function of the pressure relief valve assembly 8 is to allow the liquid to be discharged from the pump body 1 when the liquid inside the pump body 1 is in a high pressure state, so that the pressure is in a low pressure or no pressure state.

[0038] The pressure control valve 9 is used to detect the pressure. When the pressure in the pump body 1 is higher than a certain set pressure, the micro switch 44 therein is actuated to generate an electrical signal, causing the external control element to turn off the motor. The pressure control valve assembly includes a second valve stem 37, on which a valve sleeve 38 is sleeved, the lower end of the valve sleeve 38 is screwed into the pressure control valve hole, a pressure control valve body 39 is sleeved on the valve sleeve 38, a pressure regulating cap 40 is screwed outside the pressure control valve body 39, an upper spring seat 41 and a lower spring seat 42 are arranged between the pressure control valve body 39 and the pressure regulating cap 40, one end of a fourth return spring 43 is pressed tightly against the upper spring seat 41, and the other end is pressed tightly against the lower spring seat 42, the upper end of the second valve stem 37 is connected to the lower spring seat 42, a micro switch 44 is arranged on the pressure control valve body 39, and the lower spring seat acts on the micro switch. When the pressure in the pump body is higher than the set pressure, the pressure drives the second valve stem 37 upward, thereby driving the lower spring seat 42 upward, thereby causing the micro switch 44 to generate an electrical signal.

[0039] The above embodiment is only one of the preferred embodiments of the present utility model, and is not intended to limit the scope of implementation of the present utility model. Therefore, any equivalent changes made based on the shape, structure, and principle of the present utility model should be included in the protection scope of the present utility model.

Claims

1. A vertical plunger pump for a spraying machine, characterized in that: The pump body (1) comprises a plunger hole (2) and a suction valve hole (3) arranged in a vertical direction in the pump body (1); the plunger hole (2) and the suction valve hole (3) are arranged coaxially and are connected to each other; the pump body (1) is also provided with a discharge valve hole (4) connected to the plunger hole (2) and the suction valve hole (3); a pressure relief valve hole and a pressure control valve hole connected to the discharge valve hole (4); a plunger rod (5) is arranged in the plunger hole (2); the upper end of the plunger rod (5) extends out of the pump body (1); and a suction valve assembly is arranged on the suction valve hole (3). A material suction valve assembly (6) is provided on the material discharge valve hole (4), a pressure relief valve assembly (8) is provided on the pressure relief hole, and a pressure control valve (9) is provided on the pressure control valve hole. The plunger rod (5) is sealedly connected to the plunger hole (2). The material suction valve assembly (6) comprises a material suction check valve body (10), a material suction hole (11) is provided in the material suction check valve body (10), a first valve seat (12) is provided at the upper end of the material suction hole (11), and a first steel ball (13) is movably provided on the first valve seat (12).

2. A vertical piston pump for a spraying machine according to claim 1, characterized in that: The upper end of the suction valve hole (3) is a constricted portion, and a first step surface (14) is formed between the constricted portion and the suction valve hole (3). A first spring seat (15) is arranged above the first steel ball (13). One end of a first return spring (16) is mounted on the first spring seat (15) and the other end is mounted on the first steel ball (13). The first spring seat (15) abuts against the first step surface (14).

3. A vertical piston pump for a spraying machine according to claim 1 or 2, characterized in that: The plunger rod (5) and the plunger hole (2) are sealed and connected via a sealing assembly, wherein the sealing assembly comprises a sealing support ring 1 (17), a first V-shaped sealing ring (18), a second V-shaped sealing ring (19), and a sealing support ring 2 (20). The first V-shaped sealing ring (18) and the second V-shaped sealing ring (19) are stacked one on top of the first V-shaped sealing ring (18) or the second V-shaped sealing ring (19). The sealing support ring 2 (20) is stacked above the uppermost first V-shaped sealing ring (18) or the second V-shaped sealing ring (19).

4. A vertical piston pump for a spraying machine according to claim 3, characterized in that: The first V-shaped sealing ring (18) is a UPE V-shaped sealing ring, and the second V-shaped sealing ring (19) is a fluororubber V-shaped sealing ring or a cowhide V-shaped sealing ring.

5. A vertical piston pump for a spraying machine according to claim 3 or 4, characterized in that: An upper guide sleeve (21) is sleeved on the plunger rod (5) above the sealing assembly, and the upper guide sleeve (21) and the sealing assembly are axially limited by a locking nut (22) screwed to the upper end of the plunger hole (2).

6. The vertical piston pump for a spraying machine according to claim 1, characterized in that: A reset hole (23) is provided on the pump body (1) on one side of the first steel ball (13), and a reset component for driving the first steel ball (13) to reset is provided on the reset hole (23). The outer end of the reset hole (23) is low and the inner end is high.

7. A vertical piston pump for a spraying machine according to claim 6, characterized in that: The reset assembly comprises a reset rod (24), a locking nut (25) is sleeved on the reset rod (24), a step hole is arranged in the locking nut (25), the step hole comprises a second step surface (26), a limiting convex edge (28) is arranged on the reset rod (24), one end of the reset rod (24) is inserted into the step hole and sleeved with a second reset spring (27), one end of the second reset spring (27) is pressed against the bottom of the reset hole, and the other end is pressed against the limiting convex edge (28) of the reset rod (24), the limiting convex edge (28) is abutted against the second step surface (26) of the locking nut (25), the other end of the reset rod (24) is connected to a pressing head (29), and the inner end of the reset rod (24) is extended into the plunger hole (2) when an external force acts on the pressing head (29) to push the first steel ball (13) to reset.

8. The vertical piston pump for a spraying machine according to claim 1, characterized in that: The discharge valve assembly (7) comprises a discharge valve body (30), wherein a water outlet hole (31) is arranged inside the discharge valve body (30) and axially penetrates the discharge valve body (30), wherein the water outlet hole (31) is a stepped hole, wherein the stepped hole comprises a third stepped surface (32), and a second valve seat (33) is arranged at the inner end of the discharge valve body (30), and a first valve stem (34) and a second steel ball (35) are arranged between the second valve seat (33) and the third stepped surface (32), wherein the first valve stem (34) causes the second steel ball (35) to abut against the second valve seat (33) via a third return spring (36).

9. A vertical piston pump for a spraying machine according to claim 8, characterized in that: One or more water holes (45) are circumferentially distributed on the side wall of the discharge valve body (30), and the water outlet hole (31) is connected to the pressure control valve hole and the pressure relief valve hole through the water holes (45).

10. The vertical piston pump for a spraying machine according to claim 1, characterized in that: The pressure control valve (9) comprises a second valve stem (37), a valve sleeve (38) is sleeved on the second valve stem (37), the lower end of the valve sleeve (38) is screwed into the pressure control valve hole, a pressure control valve body (39) is sleeved on the valve sleeve (38), a pressure regulating cap (40) is screwed outside the pressure control valve body (39), an upper spring seat (41) and a lower spring seat (42) are arranged between the pressure control valve body (39) and the pressure regulating cap (40), and one end of a fourth return spring (43) is provided. The second valve stem (37) is pressed against the upper spring seat (41) and the other end is pressed against the lower spring seat (42). The upper end of the second valve stem (37) is connected to the lower spring seat (42). A micro switch (44) is arranged on the valve body (39) of the pressure control valve. The lower spring seat (42) acts on the micro switch (44). When the pressure in the pump body (1) is higher than the set pressure, the pressure drives the second valve stem (37) upward, thereby driving the lower spring seat (42) upward, and then causing the micro switch (44) to generate an electrical signal.

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