WO1998040629A1 - Vacuum pumping apparatus - Google Patents

Abstract

A vacuum pumping apparatus which supplies water into a reservoir at high speed, and has a stable and steady water storage capacity and a high electric power saving efficiency. The apparatus essentially comprises vacuum control means (4) (electromagnetic vacuum valve) and vacuum indicating means (5) (Geissler tube) provided on the top surface of a vacuum storage tank (2) housing therein an intake pipe (22) provided at its upper portion with a check valve (22a), and a vacuum pump (1) connected to the top surface through a suction pipe (21). Further, a pumped water surface indicating pipe (25) of glass having therein a float (28) is projectingly provided on a side surface of the vacuum storage tank (2), and photoelectric element sensors (26, 27) are provided on the outer periphery of the indicating pipe so as to face respectively an upper limit level (A) and a lower limit level (B). Outputs of the detecting means (26, 27), respectively, are connected to a control means (3) which controls the vacuum pump (1) and the vacuum control means (4). A reservoir (6) is connected to the underside of the vacuum storage tank (2) by a discharge pipe (23) provided with a check valve (3a). A shut-off valve (63) is operated to discharge water from a discharge pipe (62).

Description

Technical field

 The present invention relates to a water pump for supplying water to a water storage tank or the like, and more particularly to a vacuum pump using a vacuum pump. Conventional technology

Generally pumping performed is a form force ^s usual to pump sucks up water directly from the reservoir or the like using a pumping pump reciprocating or rotary.

 However, in the above-described conventional pumping apparatus, complicated operations are required to always maintain a constant water volume in a water storage tank or the like. In other words, the operating state of the pump must be precisely controlled in accordance with the temporal change in the amount of water used in the water storage tank. Provision of a large-capacity water storage tank facilitates pumping control. A large amount of equipment cost is required. In addition, there is a risk that the equipment may become idle due to changes in circumstances.

 Therefore, the present invention solves the above-mentioned problems of the conventional technology by using a vacuum pump to automatically control the amount of pumped water in response to fluctuations in the amount of water used, thereby making it possible to store water in a water storage tank. It is an object of the present invention to provide a vacuum pumping device that can secure a constant volume and also achieve a power saving effect. Disclosure of the invention

In order to achieve the above object, a vacuum pumping device according to the present invention comprises a vacuum pump, a vacuum pumping tank, a vacuum degree indicating means, and a water storage tank, and the vacuum pumping tank communicates with the vacuum pump through an intake pipe. The reservoir is connected to the water storage tank by a discharge pipe with a check valve at the end, and has both upper and lower level detection means for the amount of pumped water and a water intake pipe with a check valve at the upper end. Has a water discharge pipe provided with an opening / closing valve, and the control means controls the operation of the vacuum pump and the operation of the degree-of-vacuum adjusting means by means for detecting both the upper limit and the lower limit of the yield. According to the present invention, since the vacuum pumping tank is configured as described above, the vacuum pumping tank automatically controls the pumping amount according to the fluctuation of the amount of water used in the water tank, and pumps water from the vacuum pumping tank to the water tank. By accelerating the supply speed, it is possible to stably secure the amount of water stored in the water tank that can be adapted for multipurpose use, and to obtain a power saving effect. BRIEF DESCRIPTION OF THE FIGURES

FIG. 1 is a conceptual diagram showing the configuration of the vacuum pumping device of the present invention. BEST MODE FOR CARRYING OUT THE INVENTION

 An embodiment of the present invention will be described with reference to the drawings.

 FIG. 1 is a conceptual diagram showing the configuration of a vacuum pumping device according to the present invention. In the drawings, reference numeral 1 denotes a vacuum pump, which is connected to an air pipe 21 protruding from an upper part of a vacuum pumping tank 2. As the vacuum pump, a reciprocating vacuum pump or an oil rotary vacuum pump is used.

 It is desirable that the capacity of the vacuum pumping tank 2 be equal to or larger than the capacity of the water storage tank 4. The volume is set to the required and sufficient volume at. In addition, it is necessary that the tank be made of, for example, a corrosion-resistant metal having sufficient airtightness to maintain a degree of vacuum and sufficient strength to shut off external pressure. The bottom is fitted with a water intake pipe 22 with a check valve 22a at the upper end, and its lower end is inserted below the water surface of an intake reservoir or the like. The check valve 22a is configured so that water is sucked up only in the direction of the arrow shown in the drawing of pumping water, and that pumping does not flow backward even if the degree of vacuum in the vacuum pumping tank 2 is reduced. Similarly, a discharge pipe 23 is attached to the bottom surface, and the other end is connected to an intake port 61 on the side of the water storage tank 6.

 A check valve 23 a is attached to the end of the discharge pipe 23, so that water flows only in the direction of the arrow shown in FIG. 1 and does not flow backward.

Reference numerals 26 and 27 denote photoelectric element sensors as means for detecting both the upper limit and the lower limit of the amount of pumped water, respectively.The glass protruding from the side surface of the vacuum pumping tank 2 It is fixed at the upper and lower limit positions of the pumping surface indicator pipe 25 made of pipe.

 The upper and lower positions are set as follows. That is, since both ends of the pumping surface display tube 25 penetrate into the tank of the vacuum pumping tank 2, the position corresponding to the floating member 28 floating in the display tube is directly used as the pumping surface of the vacuum pumping tank 2. It will be displayed. On the other hand, the upper limit and lower limit of the pumping amount are selected as the optimal pumping surface position from various conditions such as the volume of the vacuum pumping tank 2, the output of the vacuum pump 1, the water storage amount of the water tank 4, and the like.

 In the present embodiment, the upper and lower limits of the pumping amount are set on the A and B planes as shown in FIG. Therefore, it corresponds to the position limit position corresponding to the float 28 when the pumping surface is A, and the position limit position corresponding to the float 28 when the pumping surface is B.

 In the present embodiment, a photoelectric element sensor using a combination of a light emitting diode and a light receiving diode is employed as the means for detecting the upper and lower water pumping levels. However, a transmission unit using an optical fiber can be used, and airtightness can be satisfied. If it is, a switch mechanism can be adopted.

 Reference numeral 3 denotes a control means, which has a switch for manually starting and stopping the operation of the vacuum pump 1, and is connected in circuit with both means for detecting the upper and lower levels of the pumped water, and The operation of the vacuum pump 1 is controlled by operating an electromagnetic relay or the like based on a detection signal generated in the photoelectric element sensor 1 as the detection means, and the operation of the vacuum degree adjusting means 4 is controlled by the detection signal.

 Reference numeral 4 denotes a vacuum adjusting means, which is attached to the upper surface of the vacuum pumping tank 2. In the present embodiment, an electromagnetic vacuum valve is employed as the degree of vacuum adjustment, and by operating this, the atmospheric pressure is introduced into the vacuum pumping tank 2 to reduce the degree of vacuum, and water is stored from the vacuum pumping tank 2. It increases the pumping speed of pumping water to tank 6.

Reference numeral 5 denotes vacuum degree indicating means, which is attached to the upper surface of the vacuum pumping tank 2. A Bourdon tube or the like is generally used as the vacuum degree display means 5, but in this embodiment, a Geisler tube 51 is employed. Geisler tube 5 1 electrode When a high voltage of about 500 V is applied between the electrodes 52 and 53 by the booster 54, a discharge occurs between the electrodes with a color corresponding to the degree of vacuum. Can be easily detected.

 Reference numeral 6 denotes a water storage tank, which is connected to a suction pipe 6 1 on the side face of the discharge pipe 23 of the vacuum pumping tank 2, and passes through a check valve 23 a attached to a tip of the water storage tank 6. It is supplied with pumping power. A water discharge pipe with an open / close valve 63 on the bottom

6 2 power s are attached. As the water storage tank 6, for example, a plurality of water storage tanks having a capacity according to each use such as a flush toilet may be installed in parallel. In the vacuum pumping apparatus configured as described above, the following operation is performed.

When the vacuum pump 1 is started by a manual switch in the control means 3, the inside of the vacuum pumping tank 2 is evacuated, and a negative pressure is generated as the degree of vacuum increases, and from the intake tank through the intake pipe 22 and the check valve 22a. Water is sucked and pumping starts. When the pumping surface force ^s in the tank rises and reaches the surface A in FIG. 1, the float 28 rises to the position corresponding to the pumping water upper limit level detecting means 26, and the photoelectric element sensor as the detecting means 26 is activated. At the same time as detecting the light shielded or reflected by the float 28, the detection signal is transmitted to the control means 3.

 As described above, the non-contact detection means by blocking or reflecting the light of the floats 28 reliably controls the airtightness of the pumping surface display tube 25 communicating with the vacuum pumping tank 2 without any influence. Means 3 can be activated. The control means 3 receiving the upper limit level detection signal activates the electromagnetic relay and the like to stop the vacuum pump 1, and activates the electromagnetic vacuum valve as the degree-of-vacuum adjusting means 4 at an appropriate timing.

Even if the vacuum pump 1 power S is stopped, the pumping is continued as it is because the vacuum level in the vacuum pumping tank 2 is maintained S, but the pumping surface (eight sides) is communicated with the outside air by the operation of the vacuum control means 4. Then, the pumping action stops because the negative pressure changes to atmospheric pressure, and at the same time, the speed of water supply flowing to the water storage tank 6 via the discharge pipe 23 is accelerated by pressurization of the atmospheric pressure. If the storage volume of the water storage tank 6 falls below the specified limit, the level of the ocean water in the vacuum pumping tank 2 will drop to reach the surface B. At that time, the float 28 descends to the position corresponding to the pumped water lower limit level detecting means 27. Therefore, the photoelectric element sensor 1 as the detecting means detects the float 28 and generates a lower limit level detection signal. Upon receiving this signal, the control means 3 operates the vacuum pump 1 again by operating an electromagnetic relay or the like, and if necessary, restores the electromagnetic vacuum valve of the vacuum adjustment means 4 so that the outside air of the vacuum pumping tank 2 is recovered. Cut off communication.

 The vacuum pump 1 increases the degree of vacuum in the vacuum pumping tank 2 again, and continues the operation until the pumping surface rises and recovers to the surface A at the upper limit of the pumping amount. In the meantime, the water in the water storage tank 6 is stably supplied to the used equipment without the water flowing backward from the water storage tank 6 to the vacuum pumping tank 2 by the check valve 23 a in the discharge pipe 23.

 In addition, even when the vacuum pump 1 stops operating and the negative pressure drops, the pumping water in the intake pipe 22 is retained by the check valve 22a without falling, so when the vacuum pump 1 restarts operation. It is possible to prevent waste of sucking water into the intake pipe 22 again.

 The timing of stopping and starting the vacuum pump 1 in response to the signals generated by both the upper and lower pumping amount detection means 26 and 27 and the timing of the start and stop of the operation of the vacuum degree adjusting means 4 For the relationship, the output of the vacuum pump 1, the characteristics of the electromagnetic vacuum valve as the degree of vacuum adjustment 4, the capacity of the vacuum pumping tank 2 and the water storage tank 6, the fluctuation range of the amount of water used in a crisis that loads the water storage tank 6, etc. The control circuit power of the control means 3 is configured so that the most efficient pumping and water supply timings can be selected in consideration of the above conditions.

 If the operation of the vacuum pump 1 is abnormally increased due to a decrease in pumping efficiency, the vacuum degree display means 5 may cause the deterioration of the performance of the vacuum pump 1 or the vacuum degree adjusting means 4 or the air pumping of the vacuum pumping tank 2. It is possible to quickly detect the occurrence of a decrease in density. Further, it is also possible to activate the back-up pump using the detection output of the vacuum degree display means 5.

The water discharge pipe 62 and the open / close valve 63 in the water storage tank 6 are necessary for cleaning, maintenance and inspection of the vacuum pumping water tank 2 and the water storage tank 6. The illustration of the water supply path to the equipment used as a load on the water storage tank 6 is omitted. Industrial applicability

 According to the present invention, pumping is performed by using the negative pressure of the vacuum pump, so that pumping can be continued even after the vacuum pump is stopped. However, the operating time of the pump can be greatly reduced, and a high power saving effect can be obtained. It is hoped that such shortening of the pump operation time will be used extremely effectively in developing countries suffering from chronic power shortages.

 In addition, the upper limit and lower limit of the pumping amount are detected without affecting the vacuum tightness by using a photoelectric element or an optical fiber, and the operation of the vacuum pump and the operation of the degree of vacuum adjustment means such as an electromagnetic vacuum valve are controlled. With this configuration, it is possible to automatically control the pumping rate in accordance with fluctuations in the amount of water used in the water storage tank, increase the water supply speed to the water storage tank, and secure a stable water storage volume at all times. Can be.

 In addition, the degree of vacuum indication using a Geisler tube or the like allows the air density in the vacuum pumping tank and the performance of the vacuum pump and the means for adjusting the degree of vacuum to be easily monitored. Therefore, it does not require any special technology, and is widely used in these respects.

Claims

Scope of Claim 1 A vacuum pumping device comprising a vacuum pump, a vacuum pumping tank, a control means, a vacuum adjusting means, a vacuum indicating means, and a water storage tank, wherein the vacuum pumping tank comprises: An intake pipe communicating with the vacuum pump, a water intake pipe provided with a check valve at the upper end, detection means for detecting the upper and lower limits of the amount of fresh water, and a discharge pipe communicating with the water storage tank and having a check valve at the tip. The water storage tank has a water intake port communicating with the discharge pipe, and a water discharge pipe provided with an open / close valve, and the control means detects the water with an upper limit and a lower limit level by means of both detection means. The operation of the vacuum pump and the operation of the vacuum degree adjusting means are controlled.