SU807102A1 - Shock stand for testing pneumatic devices - Google Patents

Description

The invention relates to k testing equipment, and more specifically to test benches for shaking valves after their repair. A test stand for testing pneumatic hammers for vibration, containing a frame, two power cylinders, a yoke with a guide mounted on the stays of power cylinders, a carriage with test 1 hammer and two cylinders providing the supply of a hammer to a rivet, a package imitating a product, on which riveting is made 1. The disadvantages of such a stand are large dimensions and structural, complexity due to the large number of pneumatic equipment. The closest to the proposed technical essence and the achieved result is a test bench for pneumatic percussion devices, containing a frame, a bracket with a frame for mounting the tested device connected to the compressed air line, rounded on it; the device under test and mounted on the horizontal bar of the bracket 2. However, the known stand does not allow shaking valves to be tested after repair. The purpose of the invention is to provide an opportunity to test the valves of the shaking of the molding machines after their repair. The stated purpose is achieved in that the pressing mechanism is designed as a pneumatic cylinder and a spring-loaded piston located inside it with a rod carrying a support bar at the end, coaxially with which the shaking plunger of the test valve is installed, and the cavity of the pneumatic cylinder communicates with the cavity of the valve body, Fig. I depicts a stand, a general view; in fig. 2 - pressing mechanism, side view in section; in fig. 3 - the test valve at the time of lifting. Insetting the plunger, section; in fig. 4 shows the pressing mechanism at the moment of lifting the shaking plunger, side view in section. The bench for testing pneumatic, impact devices includes a fixed frame 1 with a crown 2 fixed on it in a 49nd horizontal bar 3 and a vertical panel 4 to which the test valve shaking is attached to the bolts 5. . The shaking valve b comprises a housing 7 in which a double-seat valve 8 with an annular protrusion 9 is placed, controlled by a piston 10, and an exhaust port 11, a cavity 12 and an exhaust cavity 13, and a bottom crest 14, are made in which an upper port 15 is provided. the cover 16, which forms a reversing chamber 17 with the end surface of the double-seat valve 8. The upper cover 16 is glued in water with the shaking cylinder 18, inside of which is placed the shaking plunger 19 with the stem 20. At the end of the rod 20 there is a shaking tool 21 sec. The cover 23 of the shaking cylinder 18 is connected by a connecting channel 24 to a cavity 25 in the bottom cover 14 and connected by a channel 26 to a reversing camera 17.. The outlet 27 is made in the upper part of the cylinder 18 of shaking. To shake and lower the shaking the plunger 19 is provided with a pressing mechanism in the form of a pneumatic cylinder 28 fixed by means of bolts 29 on a horizontal bar 3, the piston 30 with the rod 31 is placed inside and the spring 32 is mounted. The rod 31 is mounted coaxially to the shaking rod 20 and The clip is fixed to the support plate 33. The cavity 34 of the pneumatic cylinder 28 is connected by a hose 35 to the cavity 12 of the housing 7 of the valve 6 of the shaking. The test bench for pneumatic percussion devices operates as follows. In the initial position (Figs. 1 and 2), the double-seat valve 8 occupies the lower position and rests on the lower bolt 14, the piston 30 and the agitations plunger 19 is lowered, while the agitator support 21 takes the lower position. Compressed air from the line through the cavity 25 and the inlet 15 in the lower cover 14 enters the body | test valve 6 is shaken. At the same time, the double-seat valve 8 moves to the upper position, blocking the exhaust hole 11 with its annular protrusion 9 (Fig. 3). Through the annular gap 36 formed between the twin-seat valve 8 and the lower skid cap 14, air enters the cavity 12 of the valve housing 7 and is shaken, and further the compressed air flows through the hose 35 into the cavity 34 of the pneumatic cylinder 28. The pressure piston 30 moves upward, compressing the spring 32 (Fig. 4). At the same time, compressed air from the cavity 25 of the bottom cover 14 enters through the connecting channel 24 into the cavity 23 of the shaking cylinder 18. Its pressure increases and the plunger 19 moves upwards, while raising the stem 20 to shake the support 21 with the dust cap 22 (Fig. 3). Having risen to the upper position, the plunger 19 closes the opening 27 and releases the channel 26 through which the compressed air from the cavity 23 of the cylinder 18 is shaking. It enters the reversing chamber 17 of the upper cover 16 of the valve 6 at the shaking. Under the action of compressed air acting on the piston 10, the twin-seat valve 8 moves down and lowers onto the bottom cover. 14, thus blocking the inlet 15, freeing the exhaust hole 11 and forming an annular gap 37. Access of compressed air to the pneumatic cylinder 28 is closed and compressed air exits through the hose 35 to the atmosphere through the cavity 12, the annular gap 37, the exhaust hole 11 and the exhaust cavity 13. This causes air to fall in air cylinder 28, causing spring 32 to expand and move piston 30 down to its initial lower position (Lig. 2), while WTOK 31 also moves downward to its support point 33 and presses on the shaking support 21. Plunger 19 lowers from the bottom, closing channel 26. The air supply to the reversing chamber 17 is stopped. When plunger 19 goes down and takes its initial lower position, the connecting channel 26 and outlet 27 are released, through which compressed air from the reversing chamber 17 of the upper cover 16 is released into the atmosphere (Lig. 1). The implementation of the test bench for pneumatic percussion devices according to the invention makes it possible to reduce the time and laboriousness during the repair of the molding machine by preliminarily testing the performance of the shaking valves after their repair. Lormula of the Invention A test bench for pneumatic percussion devices, containing a frame, a bracket attached to it with a bar for mounting a test device connected to a compressed air line, and a pressing device for a test device placed on a bar

bracket, distinguished by the fact that, in order to ensure the possibility of testing the valves of the molding magnets after their repair, the pressing mechanism is designed as a pneumatic cylinder and a spring-loaded piston located inside it with a rod bearing at the end of the supporting pin, coaxially with which the shaking plunger is installed the subject

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the valve, and the cavity of the pneumatic cylinder communicates with the cavity of the valve body.

Sources of information taken into account in the examination

1. Author's certificate of the GSSR 189609, cl. About 01 M 15/00, 1966.

2. USSR author's certificate number 471188, cl. B 25 D 17/24, 1972 (prototype).

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Claims (1)

Claim A test bench for testing pneumatic shock devices, comprising a frame, a bracket attached to it with a bracket for installing the test device connected to the compressed air line, and a clamping mechanism for the test device located on the bracket bracket, I distinguish that, in order to ensure the possibility of testing the shaking valves of molding machines after their repair, the clamping mechanism is made in the form of a pneumatic cylinder and a spring-loaded piston placed inside it with a rod bearing a support rod at the end irN, which is installed coaxially shaking test valve plunger and the cavity of the pneumatic cylinder communicates with the cavity of the valve body.