JP3423915B2 - Plunger type pump device - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optimum plunger for applying a high pressure to a fluid when pressurizing various raw material fluids in various industries such as chemicals, foods, and chemicals to atomize substances in the fluids. Pump device.

[0002]

2. Description of the Related Art Plunger type pumps are well known as those which give a high pressure to a fluid, especially those of triple type. This is a type in which a plunger reciprocatingly connected by a connecting rod to a crank shaft rotatably supported by a crank case is of a triple type to generate a high pressure. The tip of the plunger faces a space to be a pressure chamber, and the space is communicated with the suction side and the discharge side of the raw material fluid via a check valve for suction and a check valve for discharge. As a result, the chamber between the two check valves and the space form one pressure chamber. At that time, a strong V or square packing is fitted to the plunger tip shaft portion so as to prevent the fluid from leaking from the pressure chamber, thereby forming a seal of the shaft portion. In addition, since the discharge pressure is high in the triple type, in consideration of the installation of the check valve and the pipe connection relationship, a block that can be called an iron lump is used, and this is divided into the ABC manifold, and each of the three types is divided into three stations. Is formed so that it can be attached to the crankcase. Conventional pumps now allow 1
By applying a high pressure of about 50 MPa and pouring it into the atomization generator at high pressure and high speed, the substance in the raw material can be atomized into the micron range.

[0003]

However, the conventional pump has a serious problem in performing maintenance such as maintenance inspection. That is, the reciprocating motion of the plunger causes wear of the V-shaped or rectangular packing and wear of the check valve. For this reason, it is necessary to perform maintenance of the V or square packing as well as check valve disassembly inspection and replacement at any time. However, since the block attached to the crankcase is a large mass of iron because it holds high pressure, Difficult to handle,
Moreover, it was not economical in terms of resources.

Therefore, the present invention aims to solve the above-mentioned problems.
It is an object of the present invention to provide a plunger type pump device which is advantageous from the viewpoint of maintenance and resource economy.

[0005]

In order to solve the above-mentioned problems, the present invention has the following constitution.

[Claim 1] A crankcase movably supports a plunger in the axial direction, and one end of the plunger is connected to a crankshaft rotatably provided on the crankcase by a connecting rod to connect the crankcase with the crankcase. A sleeve having a V or square packing is detachably fixed to the side opposite to the crankshaft, and the other end of the plunger is extended through the V or square packing into the inner space of the sleeve. A hole communicating with the space at the end on the fixed side,
A concave or convex taper around the hole and a female or male screw are provided, and a check valve for suction and a check valve for discharge are provided.
Further, an adapter having a communication hole for communicating both check valves is provided, and a hole communicating with the communication hole, a concave or convex taper around the hole, and a female or male screw are provided in a part of the adapter. , On the other hand, a tube member having a tube having a convex or concave taper at its tip, a sheath screwed into the tube with a reverse screw, and a male or female screw cap nut in contact with the sheath is provided at both ends,
Each of the cap nuts is screwed to the end of the sleeve and a part of the adapter to bring the convex taper into close contact with the concave taper so that the space of the sleeve communicates with the communication hole of the adapter. A plunger type pump device characterized by comprising a pipe joint for high pressure.

[Claim 2] In the plunger type pump device according to claim 1, the pump is a triple-type pump having a phase difference of 120 ° in the rotational direction, and three adapters are provided for suction at both ends. The check valve is adapted to communicate with the first communication pipe through the normal pressure pipe joint, and the discharge check valve is connected with the second communication pipe through another high pressure pipe joint. A plunger type pump device characterized by being communicated with each other.

The present invention operates as follows with the above configuration.

That is, according to the first aspect of the present invention, since the adapter having the check valve for suction and discharge and the pipe member having the opposite screw sheath and the cap nut at both ends constitute the high pressure pipe joint, the cap nut is constituted. The sleeve can be removed from the crankcase by loosening the pipe connection and removing the pipe joint from the sleeve on the crankcase side. Inspection, repair, replacement and overhaul of the check valve of the V or square packing with the sleeve disposed, Easy to replace. In the pipe joint, the main part of the adapter can be composed of a hexahedron with three-way mouth, and the pipe member can also be made of a hollow circular pipe, so it can be made extremely lightweight, so maintenance is easy and economical in terms of resources. It will be.

Next, in the present invention, the pump is a triple-type plunger pump, and the three pipe joints are connected to the first communication pipe through the normal pipe joint on the suction side and another high-pressure pipe joint on the discharge side. Since the second communication pipe is communicated with the second communication pipe, the pressure is high, the vibration is small, the weight is small, and the resource is economical.

[0011]

BEST MODE FOR CARRYING OUT THE INVENTION A triple type plunger type pump device according to an embodiment of the present invention will be described with reference to FIGS.

FIG. 2 showing the central vertical section of FIG. 1 shows the connecting rod 8 and the plunger 9 in a reciprocating state of upper and lower halves, and FIG. 4 shows the right half of FIG. 2 and FIG. In Fig. 1, the crankcase 1 is composed of a horizontal box in which the crankshaft 2 is rotatably supported around a horizontal axis, the lid 3 is fixed to the right end with a bolt 4, and the lubricating oil is filled inside with a lid 5. It can be injected up to half the height by removing it. At the center and below the lid 3, there are a peephole 6 for lubricating oil inspection and a drain plug 7 for discharge.

A large end portion of a connecting rod 8 is connected to a crankshaft 2 which is connected to be driven by a motor such as a motor, and there are three connecting rods. It has become a thing. The small end of the connecting rod 8 is connected to the piston 9 a of the plunger 9 by the piston pin 10. The piston 9a can slide (reciprocate) in the cylinder portion 1a of the crankcase 1 with a stroke of 2R by the large end rotational movement of the connecting rod 8 accompanying the rotation of the crankshaft 2 with the crank radius R. There is.

2 and FIG. 3 showing the left half of FIG. 2, the plunger 9 includes a bolt nut 11 on the piston 9a.
And a small diameter portion 9c made of ceramic, which is connected to the intermediate diameter portion 9b with a central thin screw.
Is incorporated. The small diameter portion 9c is supported by a holder 13 detachably attached to the left end of the crankcase 1 with a stud nut 12. The holder 13 is positioned by a knock pin 14 (see FIG. 6) on the mounting surface with respect to the crankcase 1, and the bearing 15 also serving as an oil-filling member, the first oil seal 16, the second oil seal 17, and the bearing 18 are aligned with each other in good alignment. Prepare In addition, if necessary, the holder 13
Connect a cooling water pipe to prevent heat generation due to plunger sliding.

A cylindrical sleeve 19 is screwed and fixed to the left end of the holder 13, and the tip of the small diameter portion 9c of the plunger 9 extends to the internal space 20 of the holder 13. The space 20 is partitioned by the rectangular packing 21 so as to be isolated from the lubricating oil chamber. At the left end of the sleeve 19, a hole 22 communicating with the space 20, a recessed taper 23 around the hole 22, and a female screw 24
And.

In FIG. 3 and FIG. 5 showing the main part of the pipe joint, the pipe member 28 is screwed into the pipe 27 with a circular cross-section pipe 27 having convex taper 29 at both ends and a small pitch reverse screw. Sheath 25 and cap nut 2 with a male screw in contact with this sheath 25
It consists of 6 and 6.

Further, the adapter 30 has a check valve for suction (lower at the time of suction, that is, reverse stroke at the forward stroke of the plunger) 31 on the lower surface and has a check valve for discharge at the upper surface (at the time of discharge or It has a hexagonal structure having a communication hole 33 that communicates both check valves inside, with a forward stroke of the plunger that opens on the reverse stroke and stops at the reverse stroke of the plunger). It has a hole 34, a recessed taper 35, and an internal thread 36.

Here, the connection between the sleeve 19 and the adapter 30 is as follows. That is, when both ends of the pipe member 28 are applied to the left end of the sleeve 19 and the right end of the adapter 30 and the male threaded cap nut 26 is tightened into the female screw, the tip of the cap nut 26 presses the sheath 25 and the contact pressure causes the sheath. 25 is Ms. Kai. However, since the sheath 25 and the pipe 27 have reverse threads, the rotational force of the sheath 25 acts in the direction of pushing the pipe 27, and the convex and concave tapers of the tip are brought into close contact with each other. The larger the rotational force of the cap nut 26 is, the closer the tapers are in close contact with each other, the co-rotation of the sheath 25 tube 27 is prevented, and the close contact degree of the tube tip is strengthened. As a result, the sleeve 19
Space between the check valves of the space 20 and the adapter 30, that is,
The communication hole 33 communicates with the pipe 27 to form one closed pressure chamber. This chamber withstands high pressure during discharge (forward stroke). Therefore, the pipe member 28 and the adapter 3
0 constitutes the high pressure pipe joint 37 with lightweight parts.

As shown in FIG. 7, all three adapters 30 are connected to a ball check valve 31 for suction (raw material fluid suction shown by an arrow 44) at a normal pressure (at the time of discharge). Is stopped by the check valve 31 and no pressure is applied to the end of the check valve 31).
Are connected to each other at the time of inhalation, and in the upper part, a second high pressure pipe joint 40 connected to a ball check valve 32 for discharge (discharge of raw material fluid shown by an arrow 45) The communication pipe 41 is connected to each other at the time of discharge. Another high-pressure pipe joint 40 has substantially the same structure as the high-pressure pipe joint 37 having the reverse screw type sheath described above.

As described above, the above-mentioned structure
Even if the pressure chamber for discharge is a triple type, it has three independent and lightweight pipe joints, and these are connected by a single communicating pipe. It is not necessary to use the block of and the weight is extremely reduced. Therefore, maintenance and inspection of the V or square packing 21, the check valve 31 for suction, and the check valve 32 for discharge can be easily performed.

In FIG. 1 and FIG. 2, the pump device has a right main body part on a base (not shown) for fixing the left and right bosses 4 to each other.
2, 42, and the pressure chamber constituting portion including both check valves on the left side is properly fixed together with the piping group on a table or the like (not shown). Then, at the time of inspection and repair, the base fixing side is removed, and then the fishing eyebolts 43 are used to make the balance free so that the pipe joint 37 can be loosened and removed.

The present invention is not limited to the embodiment described above, and may be a single plunger type or a type having four or more stations. In the former case, since the first and second communication pipes are unnecessary, only one pipe joint for high pressure is required, which is extremely lightweight and easy to handle.

[0023]

According to the present invention, since it is lightweight, easy to maintain, and economical in terms of resources, it is possible to provide a plunger type pump device most suitable as a pump used for atomizing raw material. You can

[Brief description of drawings]

FIG. 1 is a perspective view of a triple-type plunger type pump device according to the present invention.

FIG. 2 is a cross-sectional view showing a cross section taken along line II-II of FIG. 1, showing a plunger and a connecting rod separately in a reciprocating state of upper and lower halves.

3 is a diagram showing the left half of FIG. 2. FIG.

FIG. 4 is a diagram showing the right half of FIG.

5 is a view showing a main part of the pipe joint shown in FIG.

FIG. 6 is a view of FIG. 1 seen from above.

FIG. 7 is a diagram of the device of FIG. 1 viewed from the left side.

[Explanation of symbols]

1 crankcase 2 crankshaft 3 lid 8 connecting rod 9 Plunger 9a piston 9b Medium diameter part 9c Small diameter part 10 piston pin 13 Holder 19 sleeves 20 spaces 21 V or square packing 22 holes 23 Recessed taper 24 female screw 25 sheaths 26 Cap nut with male screw 27 tubes 28 Pipe members 29 Convex taper 30 adapter 31 Check valve for inhalation 32 Check valve for discharge 33 communication hole 34 holes 35 Recessed taper 36 female screw 37 High-pressure pipe joint 38 Tube fitting for normal pressure 39 First communication pipe 40 different high pressure pipe joints 41 Second communication pipe

─────────────────────────────────────────────────── ─── Continuation of the front page (56) References Open flat 4-137788 (JP, U) Open 49-86402 (JP, U) Open 50-47002 (JP, U) Open 58- 40575 (JP, U) Actual development Sho-58-127179 (JP, U) Special public account Sho 41-15778 (JP, B1) Actual public Sho-37-32268 (JP, Y1) (58) Fields investigated (Int.Cl. ⁷ , DB name) F04B 21/00-23/14

Claims (2)

(57) [Claims] 1. A crankcase movably supporting a plunger in an axial direction, one end of the plunger and a crankshaft rotatably provided on the crankcase are connected by a connecting rod, and an anti-crankshaft of the crankcase. V on the side
Or, fix the sleeve with square packing detachably,
The other end of the plunger is passed through the V-shaped or rectangular packing to extend into the sleeve inner space, and a hole communicating with the space is formed at an end of the sleeve on the side opposite to the fixed side, and a concave portion around the hole or In addition to providing a convex taper and a female or male screw, an adapter having a check valve for suction and a check valve for discharge and having a communication hole communicating both check valves is provided. A hole that communicates with the communication hole, a concave or convex taper around the hole, and a female or male screw are provided in part, and a pipe having a convex or concave taper at the tip, and a pipe opposite to the pipe. A tube member provided with a sheath screwed with a screw and a cap nut with a male or female screw in contact with the sheath at both ends is provided, and the cap nut is provided with the end of the sleeve and a part of the adapter, respectively. Screwed into the concave taper to make it So as to communicate the space of the probe to the communication hole of the adapter, a plunger pump apparatus characterized by comprising constituting the tube contact hand for high pressure. 2. The plunger type pump device according to claim 1, wherein the pump is a triple-type pump having a phase difference of 120 ° in the rotational direction, and the three adapters are check valves for suction at both ends. So as to communicate with the first communicating pipe through the normal pressure pipe joint, and the discharge check valve communicates with the second communicating pipe through another high pressure pipe joint. Plunger type pump device characterized in that