RU207825U1 - Stuffing plunger pump - Google Patents

Abstract

The utility model relates to the field of pump engineering, in particular to high-pressure plunger pumps, and is designed to inject lubricant into the sealing units of shut-off valves that are under high pressure. The technical result of the proposed utility model is to determine the presence of the preliminary pressure in the loading cylinder, which is necessary for pumping the lubricant into the stop valves. The technical result of the utility model is achieved due to the presence of an indicator rod in the piston unit, which makes it possible to determine the presence of preliminary pressure in the loading cylinder. 1 ill.

Description

The utility model relates to the field of pump engineering, in particular to high-pressure plunger pumps, and is designed to inject lubricant into the sealing units of shut-off valves that are under high pressure.

Known device for injecting high-viscosity materials NVMr-500 (analog) (Product catalog. [Electronic resource]: NPO ORGGAZNEFT LLC. NVMa-500 and NVMr-500 blowers. NS blowers. URL: http://www.orggazneft.ru /nagnetateli-vysokovyazkikh-materialov-nvmr-500-i-nvma-500.html (date of access: 06/08/2021) [1] containing a loading cylinder with a pumping device connected to the blower by means of a threaded connection; a handle assembly leading to action of the blower using a set of rods; a tee connected to the outlet of the blower; a pressure gauge mounted on the tee to relieve pressure at the outlet of the blower; a high pressure hose connected to the outlet of the tee; an adapter connected to the high pressure hose through a hinge. is carried out as follows: the pumping device creates a preliminary pressure inside the loading cylinder, then using the handle assembly, the blower is activated, which directs the The imaging of the cylinder through the high-pressure hose, by connecting with an adapter, to the serviced object.

The disadvantage of the analogue is the inability to determine the presence in the loading cylinder of the preliminary pressure required for pumping the lubricant.

The closest to the claimed technical device (prototype) is the Sealweld SuperGun stuffing pump (Product catalog. [Electronic resource]: Tehenergohimprom. Equipment for pumping lubricants and sealants // SuperGun screw-primed pump - Supergan plunger pump. energprom.ru/index.php/catalog/oborudovanie-dlya-nagnetaniya-smazok-i-germetikov/item/15-supergun-screw-primed-pump-plunzhernyj-nasos-supergan (date accessed: 06/08/2021) [2] containing a sleeve that is screwed to the cover; a piston assembly to create pre-pressure inside the sleeve; a handle that actuates the piston body cartridge through a set of hinges; a tee attached to the outlet of the cap; a pressure gauge mounted on the tee to relieve pressure downstream of the lids; a high-pressure hose connected at the outlet of the tee; a large coupling connected to the end of the high-pressure hose through a Z-swivel The operation of the device is as follows: the handle activates the piston, which creates preliminary pressure inside the sleeve, then using the handle, through the lever mechanism, the cartridge of the piston body (plunger pair) is activated, which directs the contents of the sleeve through the check valve, then through the tee with a pressure gauge, then through the sleeve high pressure, then through the Z-swivel, then through the outlet valve, by means of a connection using a large coupling, to the object to be serviced.

The disadvantage of the prototype is the inability to determine the presence in the bushing of the preliminary pressure required for pumping the lubricant.

The technical result of the proposed utility model is to determine the presence of the preliminary pressure in the loading cylinder, which is necessary for pumping the lubricant into the stop valves.

The technical result of the utility model is achieved due to the presence of an indicator rod in the piston unit, which makes it possible to determine the presence of preliminary pressure in the loading cylinder.

The essence of the utility model is illustrated by the figure, which depicts a stuffing plunger pump, consisting of a high-pressure unit 1 (hereinafter referred to as HP unit) with a loading cylinder 2 screwed to it by means of a threaded connection on one side and a valve union 10 on the other side, connected to the sleeve high pressure 4 with a pressure gauge 13 at the inlet, which by means of a threaded connection is connected to the valve 7 and then to the coupling 6. Inside the loading cylinder 2 there is a piston unit 3 with a handle 11 brought out to control this unit. The piston unit 3 consists of a piston 14 rigidly connected to the indicator rod 12, which has the ability to smoothly move coaxially to a limited distance inside the rod 15, which is threaded to the body of the loading cylinder 2. The possibility of coaxial smooth movement of the indicator rod 12 is ensured by using a spring 16 , the stiffness of which is selected based on the viscosity of the lubricants used. Inside the VD unit 1, a plunger pair 5 is installed and fixed by means of a union nut, which is actuated by a lever 8, which in turn is held by a lever lock 9 and is connected to the plunger pair and the body of the VD unit 1 by means of hinges and thrust guides, which fixed with bolts on the HP unit body.

The utility model works as follows. Before starting work, the required lubricant is selected, corresponding to the serviced shut-off valves. The lubricant pumped into the sealing units of the shut-off valves is charged into the unscrewed loading cylinder 2. The rotary-translational movement of the handle 11 creates a preliminary pressure inside the loading cylinder 2, which is necessary for pumping the lubricant into the shut-off valves. When a sufficient level of preliminary pressure is created in the loading cylinder 2, the indicator rod 12 moves coaxially inside the rod 15 and goes out of the piston unit 3 at a distance of up to 30 mm due to the pressure of the lubricant on the piston 14 and compression of the spring 16. After opening the valve 7, the stuffing plunger pump ready to pump lubricant into the valves. Using the lever 8, the plunger pair 5 is activated, which creates sufficient pressure to supply the lubricant through the valve union 10, then through the high-pressure hose 4 with a pressure gauge 13 at the inlet, then through the valve 7, by connecting using a coupling 6 to the stuffing fitting shut-off valves. In the process of pumping grease using the lever mechanism, the indicator rod 12 returns to its original position due to the stretching of the spring 16, which indicates that it is necessary, by rotating the handle 11, to pressurize the lubricant to the plunger pair 5.

Thus, the proposed utility model, due to changes in the design of the piston unit, which is retrofitted with an indicator rod, makes it possible to inform the maintenance personnel about the presence of the preliminary pressure in the loading cylinder, which is necessary for pumping the lubricant.

This utility model has been manufactured and is successfully used in the branches of OOO Gazprom transgaz Ufa for sealing shut-off valves against gas leaks, having established itself as a reliable and convenient device.

Claims (1)

A stuffing plunger pump, consisting of a high-pressure unit, including a plunger pair, a lever and its retainer, a loading cylinder, including a piston unit containing a piston, an indicator rod, a spring and a rod, and a handle, a valve union, a pressure gauge, a high-pressure hose, a valve and coupling, characterized in that when the preliminary pressure in the loading cylinder is created, which is necessary for pumping the lubricant into the shut-off valves, the indicator rod moves coaxially inside the rod and goes out to a distance of up to 30 mm due to the pressure of the lubricant on the piston and compression of the spring.

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