JPS629964Y2 - - Google Patents

Description

[Detailed Description of the Invention] This invention relates to a sand discharge device for a cleaning gun that can easily and reliably supply or cut off sand to a sand pipe arranged in parallel with a jet pipe by operating a lever.

Conventional. When contaminants, dust, mud, etc. adhering to the object to be cleaned cannot be removed by cleaning with a jet of liquid such as water, sand is jetted out from a sand pipe separate from the jet pipe to remove the deposits along with water. However, when sucking this sand into the sand pipe, it is necessary to manually open the on-off valves, cocks, and other parts that are placed in the middle of the suction path from the sand collection site to the sand pipe, and after the work is completed, However, it is extremely difficult to quickly and reliably cause the sand to eject or stop the sand ejection by manually blocking it again. Without enduring such troubles, it is impossible to improve work efficiency. Therefore, this invention aims to provide a sand discharging device for a cleaning gun that can quickly and reliably eject sand or stop it by pulling a lever without interposing the above-mentioned member in the middle of the pipe. An air release part is provided in the middle of the jet pipe that can communicate with the liquid supply pipe in the main body, and a lever is connected to a valve rod attached to the air release part that can open and close the air release pipe. The discharge pipe is connected to a sand pipe placed in parallel with the jet pipe.

To describe an embodiment of this invention with reference to the drawings above, a protruding piece a is made to protrude inward from the upper front end of the main body Z (the left side is the front and the right side is the rear in the drawings) of the main body Z in which the socket 1 is inserted and fixed at the bottom, The protruding piece a
A through hole b is formed in the center of the holding piece 2 that is tightly fitted to the inner circumferential wall of the plug 3. A rear end of the jet pipe 4 is placed in front of the plug 3, which has a through hole c that communicates with the front end of the through hole b. are screwed together to integrally constitute the plug 3 and the jet pipe 4, and an engagement structure d with a dish-shaped cross section is formed along the outer periphery of the plug 3 at a proper intermediate position, and a groove d is formed in the engagement groove d. It is screwed into a female screw f carved into the inner peripheral wall of a clamping piece 6 which has a through hole e for clamping the ball 5 which can be freely engaged and detached, and is connected along the front and back direction to the outer peripheral wall of this clamping piece 6. A coil spring 8 is inserted into a long groove U formed in the inner circumferential wall from the middle to the front end of the connector 7, and a coil spring 8 is inserted into the outer circumferential wall near the front end of the clamping piece 6. A retaining ring r is engaged in the provided recess i, and the outer side of this retaining ring r is brought into contact with the inner circumferential wall of the clamping piece 6, and the front end of the spring 8 is locked, so that the connector 7 is always moved rearward. The ball 5 is pressed and engaged in the engagement groove d by being biased and the plug 3 can be maintained in a connected state with respect to the clamping piece 6. An escape groove h is formed in the inner circumferential wall of the rear end of the connector 7, and when the connector 7 moves in the direction of the arrow y as shown in FIG. , the plug 3 is in a free state with respect to the clamping piece 6 so that it can be removed or inserted. In addition, the rear part of the cladding tube 9 that covers and tightly fits the front of the plug 3 is screwed onto the rear outer circumferential wall of the injection tube 4, and the injection tube is attached to a support s whose rear end contacts the front end of the cladding tube 9. An air discharge part 10 is attached to this support body s. It is movably connected to a lever 13 pivoted to a pin p1 that allows the valve to stand up in the gutter, and is movably connected to a lever 13 by a pin p2.
The spring 14, which is stretched between the rear inner wall of the
The air discharge pipe 15 connected to the front of the air discharge part 10 is connected to the middle of the sand pipe 16, and the sand pipe 16 is paralleled and extended forward along the jet pipe 4. Insert the front ends of the pipe 4 and the sand pipe 16 into the connecting piece 17 with the space n.
The tip of the jet head J, which is screwed and fixed to the coupling piece 17 via a fastener t, communicates with the hollow space n through an unwidened through hole 18. The ball 20 is stored in the space m in the support body 19 that is screwed to the rear of the other holding piece 2, and the front end of the pressing culm 21 that presses the ball 20 is connected to the pin 22.
is brought into contact with the abutment piece 23 of the lever L gripped by the lever L, and by rotating the lever L in the x direction, the ball 20 is pressed upward and the through hole 24 can be opened. Insert the lower end of the liquid feed pipe 25 into the socket 1.
In addition to screwing, grooves 26 and 27 with an inclined portion 26' are arranged side by side in a part of the inner wall of the main body z in front of the socket 1, and a guide groove w below the lever L is arranged side by side.
A locking element 29, which is fitted so that it can be raised and lowered by a spring 28 and is normally pressed and urged downward, is inserted into the groove 2.
6 or 27, and the groove 27 is large enough to allow the locking element 29 to fit therein. 3 in the diagram
0 is a grip part, 31 is a spring that presses and urges the ball 20 downward, 32 is a ventilation hole, 33 is a valve seat, 34
35 is the derivative screwed onto the lower part of the housing 19, and 35 is the housing 1.
9. This is a lid that screws upward.

Since this device has the above-mentioned configuration, when using the device, when the lever L is grasped and pulled in the x direction, the contact piece 23 presses and retreats the pressing culm 21, and the ball 20 is pushed against the spring 31. When pressing and retracting, the high pressure water introduced into the liquid feeding pipe 25 through the socket 1 passes through the space m of the support body 19 and reaches the holding piece 2.
is ejected from the front end of the jet head J via the through hole b of the plug 3, the through hole c of the plug 3, the jet pipe 4 and the connecting piece 17,
When the lever 13 is placed in the position shown in the figure due to the generation of a vacuum in the jet head J due to the low pressure and high speed of the high-pressure water flowing inside the jet head J, the sand pipe 16 is moved from the point where sand is accumulated.
The sand is sucked into the interior, reaches the joint piece 17, mixes with the jet water, and is jetted out, and the jetted water and sand remove contaminants and deposits that are difficult or impossible to remove with water alone. It can be removed and lever 13
When the valve is pulled backward (to the right), the valve stem 12 moves back and opens the hole g, so air flows from the air discharge part 10 through the air discharge pipe 16 into the sand pipe 16, reaches the jet head J, and is replaced by sand. Air is then ejected together with water, and the ejection from the sand jet head J stops. Furthermore, when the lever 13 is released from the hand, the restoring force of the spring 14 causes the tip of the valve stem 12 to instantly contact the valve seat 11, blocking the through hole g and stopping the flow of air, causing sand to flow from the jet head J again. It is squirted out along with water.

According to this invention, when closing the through hole of the valve seat that communicates with the air discharge pipe with a valve stem that is linked with a lever that is rotatably attached to the air discharge part, high-pressure water that is sucked in on the main body side is used. Sand can be sucked and ejected from the sand pipe by ejection from the jet head, and deposits that are difficult or impossible to remove with water alone can be removed.Also, when the hole in the valve seat is opened with the valve stem by pulling the lever, , it is possible to stop the ejection of sand from the spout head by allowing air to flow into the sand pipe through the air discharge pipe that communicates with the sand pipe, and because the above-mentioned action can stop the ejection of sand simply by grasping the lever. This method is significantly simpler, faster, and more reliable than the conventional method of ejecting or stopping sand by opening and closing an on-off valve or a kettle installed in the middle of the pipe. Since components such as the air release pipe, valve seat, lever, etc. can be integrated and set in the provided air release part, it is easy to manufacture and handle, and it is very convenient for the user.However, this structure can also be particularly complicated. This has practical benefits such as being able to be manufactured robustly.

[Brief explanation of the drawing]

The drawings are an embodiment of the invention, and FIG. 1 is a partially cutaway vertical sectional view of the entire cleaning gun, and FIG. 2 is an enlarged partially cutaway sectional view of the main parts of the product. Z... Main body, 4... Jet pipe, 10... Air discharge section, 12... Valve stem, 13... Lever, 15... Air discharge pipe, 16... Sand pipe, 25... Liquid sending pipe.

Claims (1)

[Scope of Claim for Utility Model Registration] (1) An air release part is provided in the middle of the jet pipe that can communicate with the liquid sending pipe in the main body, and the air release pipe attached to the air release part is attached to a valve stem that can open and close. A sand discharge device for a cleaning gun, in which a lever is connected in series, and the air discharge pipe is connected to a sand pipe arranged in parallel with the jet pipe. (2) The sand discharge device for a cleaning gun according to claim 1, wherein the jet pipe and the sand pipe communicate with each other at the opening at the tip thereof.