JPH051661A - Pressure feed device - Google Patents

Abstract

PURPOSE:To prevent the occurrence of adhesion and clogging within a pressure feed device as well as to enhance pressure feed performance when material including solid particles, selfhardening material and high visous material are fed with pressure. CONSTITUTION:A cylinder is divided into a base end side cylinder 32, a cylinder rotating barrel section 32 which includes a valve seat 32c forming section while being made rotatable around the axial center of the cylinder, and a tip end side cylinder 33. The cleaning bar 32a is provided, which is projected to the side section of a check valve 37 out of the valve seat 32c of the rotating barrel section 32, and a circular seal member 41 is concurrently provided close to the base end of the inner wall surface of the cylinder rotating barrel section 32. In addition, a pressure feed material suction port 31b is provided for the base end side cylinder 31.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a pressure-feeding device capable of preventing the pressure-feeding material from sticking and clogging in the pressure-feeding device and enhancing the pressure-feeding performance of a highly viscous material.

[0002]

2. Description of the Related Art Conventionally, various types of pumping devices for liquid agents or fluid materials have been used.
In the plunger type pressure feeding device shown in FIG. 4, a reciprocating piston 28 is fitted in a cylinder 27,
When the piston 28 is returned, the pressure-feeding material suction port 27a supplies the pressure-feeding material M into the cylinder 27.
The pressure-feeding material M is extruded during the forward movement of 8.
In order to prevent the material M that has been pressure-fed from being pulled back when the piston 28 moves back, the discharge port 27b on the front side of the cylinder 27 is opposed to the extruding direction of the pressure-feed material M and the check that closes the discharge port 27b. A valve 29 is provided.

[0003]

However, in the case of attempting to pressure-feed a solid particle-containing material or a self-hardening material by the above-mentioned plunger type pressure-feeding device,
Sticking and clogging of the pumping material in the plunger pump poses a problem. In particular, the clogging phenomenon due to the accumulation of the pressure-feeding material M at the contact portion (valve seat portion) of the check valve 29 or the step portion on the side of the check valve 29 is remarkable. If the pumping material is stuck or clogged in the pump, the pumping capacity of the pump may be reduced, and if the accumulation further progresses, the check valve 29 may become inoperable. It was necessary to disassemble and clean the interior after each use. Also,
In the case of a highly viscous material, sticking and clogging phenomena were particularly severe, and the high viscosity made pumping efficiency poor.

Therefore, a main object of the present invention relates to the pressure feeding of a material containing solid particles or having a self-hardening property, preventing sticking and clogging in the pressure feeding device, and particularly improving the pressure feeding performance of a highly viscous material. An object is to provide an improved pumping device.

[0005]

Means for Solving the Problems The above-mentioned problems are composed of a cylinder body and a piston that reciprocates in the cylinder body, and a discharge port portion ahead of the cylinder body is provided in the opposite direction of the flow of the pressure-feeding material from the outside. In a plunger type pumping device provided with a check valve that elastically abuts and closes the discharge port, a cylinder body portion including a valve seat portion of the check valve that forms the discharge port portion is provided on the front and rear front and rear sides. This can be solved by being configured separately from the end side cylinder body, and being rotatable about the central axis of the cylinder body so as to rotate the valve seat portion of the check valve. Further, with respect to the cylinder rotating body, an annular seal member that elastically contacts the side surface of the piston is provided near the base end side of the inner wall surface of the cylinder rotating body, and / or the cylinder rotating body is rotated. By fixing the cleaning bar protruding from the valve seat of the body to the side of the check valve,
A better device. Further, by providing the pressure-feeding material suction port at the base end side cylinder body portion, an excellent effect of pressure-feeding the highly viscous material is exhibited.

[0006]

In the present invention, since the cylinder body portion including the portion (valve seat) forming the pressure-feeding material discharge port portion is configured to be rotatable about the cylinder shaft as the center of rotation, the rotation body portion can be rotated at an appropriate time. By rotating the valve seat of the check valve, it is possible to prevent the check valve portion from sticking. In addition, the cleaning bar fixed to the cylinder rotating body can scrape off the deposit on the side portion of the check valve. Further, the rotation of the ring-shaped sealing member due to the rotation of the rotating body and the reciprocating motion of the piston can prevent the pressure-feeding material from sticking to the side surface of the piston.

On the other hand, a pressure-feeding material suction port is provided at the base end side cylinder body portion, that is, a distance from the pressure-feeding material discharge port portion to the pressure-feeding suction port is secured to some extent (at least the length of the rotating body portion of the cylinder). In addition, since the degree of vacuum inside the cylinder can be increased when the cylinder is moved back by combining with the provision of the annular seal material, even a highly viscous material can be easily sucked.

[0008]

The present invention will be described in detail below with reference to specific examples. FIG. 1 is a plan view of a plunger pump according to the present invention,
FIG. 2 shows an overall vertical sectional view of the plunger pump according to the present invention. Further, FIG. 3 is an enlarged view of a main part of the check valve portion. The plunger pump shown in FIG. 1 is of a double cylinder type so that two liquids can be simultaneously pumped, but the present invention may be a single type or a plunger type of two or more stations. The same applies. In FIG. 2, the pressure-feeding material M supplied from the pressure-feeding material supply port 31b of the cylinder 30 is pushed out by being pushed out by the piston 40 that reciprocates by the rotation of the cam plate 39. In the plunger pump according to the present invention, the rotating body portion 32 is provided in the middle of the cylinder 30, and the body portion forming the cylinder is arranged from the base end side to the base end side cylinder 31, the rotating body portion 32, and the tip end side. The cylinders 33 are connected in this order. At the tip of the base end side cylinder 31, a protruding portion 31 is provided at a proper position on the outer circumference thereof.
a is provided, and further, a fixing clamp rod 34 that is rotatably supported and axially supported by the protruding portion 31a is provided. On the other hand, at the base end of the tip side cylinder 33,
A penetrating convex portion 33 a is provided at a corresponding position on the outer periphery of the fixing clamp rod 34, and the rotating body portion 32 is interposed between the proximal end side cylinder 31 and the distal end side cylinder 33. The clamp clamp 34 for fixing
Is penetrated into the penetrated convex portion 33a of the tip side cylinder 33, a nut 35 is screwed and connected, and the rotating body portion 32 interposed therebetween is rotatable. Both ends of the rotating body portion 32 are engaged with the tip end side of the base end side cylinder 31 and the base end side of the tip end side cylinder 33 at mutually overlapping portions, and the outer periphery of the sliding contact surface has an annular shape. The sealability is ensured by the provision of the seals 36, 36. A check valve 37 is elastically abutted by a spring 38 from the outside in a direction opposite to the flow direction of the pressure-feeding material at the discharge port portion at the tip of the communication passage of the rotating body 32 to close the discharge port.

The portion (valve seat 32c) forming the discharge port of the rotary body portion 32 with which the check valve 37 comes into contact rotates with the rotation of the rotary body portion 32, and the shoulder portion of the check valve 37. It is designed to prevent the pressure-feeding material from sticking to the abutting portion. Further, a cleaning bar 32a is provided so as to project from the valve seat 32c to a side portion of the check valve 37, and the cleaning bar 32a is attached to the check valve 37 side as the rotary body 32 rotates. The pumping material accumulated on the one side is removed. In addition, in order to drive the rotating body portion 32 in this embodiment, an operator holds the handle 3
Although 2b is picked and manually operated, it may be mechanically operated by, for example, an air type, a hydraulic type, or a crank type. Further, a controller may be provided to automatically operate at intervals. A pressure gauge 41 for measuring the pumping pressure is provided on the tip side cylinder 33. Further, an annular seal member 41, which elastically contacts the side surface of the piston, is provided near the base end side of the inner wall surface of the rotating body portion 32.
The reciprocating movement of the rotating body 32 and the rotation of the rotating body 32 prevent the pressure-feeding material M from sticking to the outer peripheral surface of the piston 40.

On the other hand, in the present invention, the pressure-feeding material suction port 3
1b to avoid the rotating body 32, the proximal cylinder 31
Is provided at the same time to secure a stroke length corresponding to at least the length of the rotating body portion 32, and when the piston 40 is moved back by the sealing action of the annular sealing material 41 provided on the rotating body portion 32. The degree of vacuum inside the cylinder is increased to enhance the suction effect of the pressure-feeding material M. An annular seal member 42 that elastically contacts the outer peripheral surface of the piston 40 is provided near the base end side of the pressure-feeding material suction port 31b to ensure the hermeticity.

On the other hand, examples of the pressure-feeding material according to the pressure-feeding apparatus of the present invention include rubber asphalt emulsion, mixed slurry of rubber asphalt emulsion and cement powder, cement milk, cement grout, mortar grout in water, shotcrete,
In addition, it can be suitably used for pumping cement chemicals, cement asphalt, high-strength plastics, etc. in crack injection work. Above all, the effect can be particularly expected for a highly viscous pressure-feeding material that easily causes a deposition phenomenon.

[0012]

As described above, according to the present invention, even if a liquid agent containing solid particles or a pressure-sensitive material such as a self-hardening liquid agent or a fluid material is used, a simple operation can be performed without disassembling the pressure-feeding device. Only by doing so, it is possible to prevent the device from sticking or clogging. Further, even a highly viscous pressure-feeding material can be easily pressure-fed.

[Brief description of drawings]

FIG. 1 is a plan view of a plunger pump according to the present invention.

FIG. 2 is an overall vertical sectional view of a plunger pump according to the present invention.

FIG. 3 is an enlarged view of a main part of a check valve unit.

FIG. 4 is a vertical sectional view of a conventional plunger type pump.

[Explanation of symbols]

30 ... Cylinder, 31 ... Base end side cylinder, 32 ... Rotating body, 32a ... Cleaning bar, 33 ... Tip side cylinder, 34 ... Fixing clamp rod, 37 ... Check valve,
38 ... Spring, 40 ... Piston

Claims (5)

[Claims] 1. A cylinder body and a piston that reciprocates in the cylinder body, and elastically abuts a discharge port portion ahead of the cylinder body from the outside in a direction opposite to the flow direction of the pressure-feeding material, and the discharge In a plunger type pumping device having a check valve for closing an outlet, a cylinder body portion including a valve seat portion of the check valve forming the discharge port portion is separated from front and rear front and rear side cylinder body portions. And a valve seat portion of the check valve which is rotatable about a center axis of a cylinder body as a rotation center. 2. A pumping apparatus according to claim 1, further comprising an annular seal member which is elastically contacted with a side surface of said piston and which is provided near the base end side of the inner wall surface of the cylinder rotating body. 3. The pressure feeding device according to claim 1, wherein an annular seal member elastically contacting the inner wall surface of the cylinder rotating body is provided on the outer peripheral portion on the cylinder tip side. 4. The pressure-feeding device according to claim 2, wherein a pressure-feeding material suction port is provided in the base end side cylinder body portion. 5. The pressure feeding device according to claim 1, further comprising a cleaning bar fixed to a side portion of the check valve from a valve seat of the cylinder rotating body.