JP4510800B2 - Valve shaft clogging inspection method - Google Patents

Description

The present invention relates to the inspection how to check the clogging of the valve shaft.

In manufacturing equipment for foods such as beverages and alcoholic beverages, pharmaceuticals and the like, a plurality of valves are used to adjust the flow path. The plurality of valves are combined with each other to save space and are compactly configured as a valve block. Dirt may adhere to the valve shaft over time, and since this dirt cannot be determined from the appearance, the valve was removed from the valve block regardless of the presence of dirt and pressure was applied to the shaft. The water is injected and the clogging condition is inspected by checking how this water comes out, and the state of dirt is judged. On the other hand, a nozzle clogging detection device is known as a device for inspecting the clogging of a tubular one (see, for example, Patent Documents 1 and 2).
JP-A-6-109745 JP 58-146820 A

  In order to inspect dirt in the shaft, each of the plurality of valves must be removed from the valve block and checked, which is a burden on the operator. Furthermore, since the inside of the valve is touched by the operator during the inspection, the manufacturing line including the valve block is cleaned by CIP (Cleaning In Place) after re-installation regardless of whether the inspection result is normal or abnormal. There must be. On the other hand, even if the nozzle clogging detection device described above is applied to the valve shaft clogging inspection, the number of installations will be enormous if each is installed on multiple valves in the valve block. And the installation costs are enormous.

The present invention aims to provide a shaft clogging test how the valve can be inspected more valves in the valve block without removing the valve with a simple structure.

Shaft clogging inspection method of the valve of the present invention is an inspection method for inspecting the respective clogging of the shaft (110) of a plurality of valves provided on the valve block (1) in (100), as the test liquid from the tap A connection port (11) for connection to a hose (H) for drawing water, a flow meter (12) for measuring the flow rate of water supplied through the connection port, and a pressure for measuring the pressure of the water A meter (13), a supply port (14) for injecting the water connected to the inlet (114) of the shaft, and a first cock (15a) for opening and closing between the flow meter and the pressure gauge And a second cock (15b) that opens and closes between the pressure gauge and the supply port, and the water introduced from the connection port passes through the flow meter and the first cock, Flow through the pressure gauge and the second cock in order A pressure of water supplied from the connection port by preparing the configured inspection device (10), opening the first cock, and closing the second cock, connecting the connection port to the hose. Measuring one of the plurality of valve shafts as an inspection target, connecting the supply port of the inspection device to the shaft, and connecting the first cock to the shaft. Closing the flow meter, confirming that the flow meter and the pressure gauge indicate zero, opening the first and second cocks and supplying the water into the shaft, as well as measuring the flow rate of the water by the flow meter, the pressure of the water by the pressure gauge and measuring as dynamic pressure, the repeated while changing the shaft is selected as a test object, for each of the test object shaft The static pressure is constant, based on the flow rate and the dynamic pressure, to solve the above problems by checking one by one the clogging degree of the shaft of the plurality of valves.

According to the present invention, the pressure of the water supplied to the connection port of the inspection device (static pressure) is established by connecting the connection port to the hose with the first cock of the inspection device opened and the second cock closed. ) And close the first cock and confirm that the readings of the flow meter and pressure gauge are 0, then open both cocks and put the test liquid water on the shaft to be inspected. While supplying, the flow rate and pressure (dynamic pressure) representing the flow state are measured. Since the flow rate and pressure (dynamic pressure) of water change corresponding to the degree of clogging of the shaft, the degree of clogging can be easily inspected while the valve is still installed in the valve block . Even for the shafts of a plurality of valves, it can be inspected one by one simply by changing the supply section. Therefore, it is possible to check the clogging of the shaft without removing the valve, so that unnecessary CIP cleaning can be eliminated, reducing the burden on the operator, downtime of the production line, utility costs for unnecessary CIP cleaning, etc. be able to.

In one form of shaft clogging inspection method of the present invention, the test results of clogging degree of the shaft of the plurality of valves may rank the degree of clogging degree. After checking the degree of clogging of the shafts of multiple valves one by one, prioritize cleaning of clogged shafts from those that are clogged by ranking them according to the degree to which the shaft is clogged. can do. Since a shaft that does not require clogging cleaning can be identified, unnecessary CIP cleaning by removing a valve that does not require clogging cleaning can be eliminated. Therefore, the burden on the operator can be reduced.

  In addition, in the above description, in order to make an understanding of this invention easy, the reference sign of the accompanying drawing was attached in parenthesis, but this invention is not limited to the form of illustration by it.

As described above, according to the valve shaft clogging method of the present invention , the inspection device is configured by connecting the connection port to the hose with the first cock of the inspection device opened and the second cock closed. Measure the pressure (static pressure) of the water supplied to the connection port, and close the first cock and confirm that the indicated values of the flow meter and pressure gauge are 0, then The flow rate and pressure (dynamic pressure) representing the flow state can be measured while supplying the test liquid water to the shaft to be inspected and opened . Since the flow rate and pressure (dynamic pressure) of water change depending on the degree of clogging of the shaft, clogging can be easily inspected while the valve is still installed in the valve block . Even for the shafts of a plurality of valves, it can be inspected one by one simply by changing the supply section. Therefore, since inspection can be performed without removing the valve, unnecessary CIP cleaning can be eliminated, and the burden on the operator can be reduced. Furthermore, since the inspection apparatus has a simple configuration, it can be implemented at a low cost. Moreover, because it uses inspection device during inspection and connected to the shaft of the valve of the valve block, there is no need to position the valve block, it is not necessary to the inspection system provides a number of times corresponding to the number of valves, omitted installation space be able to.

  FIG. 1 is a view showing a valve block including a plurality of valves that are inspection targets of a valve shaft clogging inspection apparatus according to an embodiment of the present invention. The valve block 1 includes a mix-proof valve 100 (hereinafter abbreviated as MPV) as a plurality of valves and a plurality of pipes 101. The MPVs 100 are connected to each other by a pipe 101. The pipe 101 includes a plurality of upper pipes 101a arranged in parallel to each other and a plurality of lower pipes 101b arranged in a direction perpendicular to the upper pipes 101a. An MPV 100 is disposed at each intersection of the upper tube 101a and the lower tube 101b.

  FIG. 2A shows a detailed view of the vicinity of the shaft of MPV100. In the drawing, the right side of the MPV 100 is a cross-sectional view. The MPV 100 includes a main shaft 110 as a shaft positioned below the MPV 100, a sub shaft 111 positioned above the main shaft 110, a valve seat 112 of the main shaft 110 and the sub shaft 111, and a valve box 113. The main shaft 110 has a disc sheet 110a, and the sub shaft 111 has a disc sheet 111a. The valve seat 112 is in contact with the disc sheet 110a and the disc sheet 111a and double seals between the upper pipe 101a and the lower pipe 101b. FIG. 2A shows a diagram in which the MPV 100 is fully closed. The valve box 113 has an upper valve box 113a and a lower valve box 113b, and each is connected to the pipe 101. In addition, an injection port 114 through which water as a test liquid can be injected is provided on the upper portion of the sub shaft 111.

  FIG. 2B is a diagram in which the MPV 100 opens between the upper tube 101a and the lower tube 101b. As the main shaft 110 and the sub shaft 111 move upward with respect to the valve box 113, the disc seat 110a and the disc seat 111a are separated from the valve seat 112. Thereby, the liquid flowing through the upper valve box 113a and the liquid flowing through the lower valve box 113b are mixed.

  FIG. 3 is an overall view of the clogging inspection device for the main shaft 110 of the MPV 100. The clogging inspection apparatus 10 is a flow rate for measuring the flow rate of water supplied via the connection port 11 and the connection port 11 as an inflow unit for connection to a hose H that has drawn water from water as a test liquid supply unit. A flow meter 12 as a measurement means, a pressure gauge 13 as a pressure measurement means for measuring the pressure of the water, a supply port 14 as a supply unit connected to the injection port 114 of the MPV 100 and injecting the water, and a flow rate A cock 15 a located between the gauge 12 and the pressure gauge 13 and a cock 15 b located between the pressure gauge 13 and the supply port 14 are provided. The water flowing in from the connection port 11 passes through the flow meter 12, flows in the order of the cock 15a, the pressure gauge 13, and the cock 15b, and is supplied from the supply port 14 to the MPV 100. The connection port 11 is formed of a connector that matches the shape of the hose H that is the connection destination. Similarly, the supply port 14 is formed of a connector that matches the shape of the injection port 114 of the MPV 100 that is the connection destination. As the flow meter 12 and the pressure gauge 13, various commercially available products may be used.

  Next, a clogging inspection procedure for the main shaft 110 will be described. First, as a first procedure, the cock 15a is opened, the cock 15b is closed, and the connection port 11 is connected to the water hose. And the pressure of the water supplied from the hose shown by the pressure gauge 13 is set to predetermined value A [MPa].

  As a second procedure, the supply port 14 is connected to the injection port 114 of the MPV 100 to be inspected. The cock 15a is closed and it is confirmed that the indicated values of the flow meter 12 and the pressure gauge 13 have become zero.

  As a third procedure, the cock 15 a and the cock 15 b are fully opened, and the flow rate and pressure of the water flowing through the main shaft 110 of the MPV 100 are measured by the flow meter 12 and the pressure gauge 13. The water supplied from the hose is injected into the inlet 114 of the MPV 100 through the clogging inspection device 10 and passes through the sub shaft 111 and the main shaft 110 as shown in FIG. 2A. After the measurement, the shaft to be inspected is changed, and the supply port 14 is replaced with a shaft that has not yet been inspected. The above first to third procedures are repeated to inspect a plurality of MPVs 100 in order.

  If the main shaft 110 is contaminated and the main shaft 110 is clogged, the indication values of the flow meter 12 and the pressure gauge 13 change depending on the clogging. Table 1 below illustrates sample values of five MPVs 100 (indicated as MPVa to MPVe in Table 1). In the words and phrases in the table, the static pressure is the original pressure of water supplied from the hose H, and the dynamic pressure is the pressure in running water. If this dynamic pressure is high, there is a high possibility that the main shaft 110 is clogged. The dynamic pressure and flow rate with respect to the static pressure of the MPV 100 without clogging are measured in advance. The measurement result of the MPV 100 without clogging is that when the static pressure is a predetermined value A [MPa], the dynamic pressure is 0.5 A [MPa], and the flow rate per unit time is B [L / min]. The degree of clogging is inspected in comparison with the measurement result of the MPV 100 without clogging.

  The measurement results of MPVa are a dynamic pressure of A [MPa] and a flow rate of 0 [L / min]. This is considered that water cannot pass through the main shaft 110 at all. Therefore, it is determined that the clogged state is 100%. The measurement results of MPVb are a dynamic pressure of 0.9 A [MPa] and a flow rate of 0.5 B [L / min]. This is determined to be about 80% clogging. The measurement results of MPVc are a dynamic pressure of 0.8 A [MPa] and a flow rate of 0.6 B [L / min]. This is determined to be about 50% clogging. The measurement results of MPVd are a dynamic pressure of 0.7 A [MPa] and a flow rate of 0.75 B [L / min]. This is determined to be about 30% clogging. The measurement results of MPVe are a dynamic pressure of 0.5 A [MPa] and a flow rate of B [L / min]. Since this is an instruction value similar to that of the MPV 100 without clogging, it is determined that there is no clogging.

  After obtaining the measurement results for each of the plurality of MPVs 100 in the valve block 1, each MPV 100 is given a priority level that requires cleaning depending on the clogged state. For example, for MPV100 with 100% clogging, priority 1 is assigned, and for MPV100 with clogging about 80%, priority 2 is given below. Priorities 3, 4, and 5 are assigned, respectively. And it takes out from the valve block 1 from MPV100 of the priority 1, and disassembles and wash | cleans.

  Thereby, after setting to the static pressure predetermined by the pressure gauge 13, the clogging condition can be measured by measuring the dynamic pressure and the flow rate with the clogging inspection apparatus 10. In particular, if the static pressure is determined in advance, the degree of clogging can be grasped from the indicated value of the flow rate compared to the flow rate when there is no clogging. Therefore, the clogging state of a plurality of MPVs 100 can be grasped without removing the MPVs 100 from the valve block 1 using the clogging inspection apparatus 10. Therefore, only the MPV 100 that needs to clean the shaft clog can be removed to clean the clog, and CIP cleaning by removing the valve that does not require clog cleaning can be eliminated.

  The present invention is not limited to the above-described form and can be implemented in various forms. For example, in this embodiment, MPV is used as a valve, but the present invention is not limited to this, and may be applied to clogging inspection of shafts of various valves. In addition to the valve, it may be used for a tubular member such as a nozzle. Since it is a simple device, the introduction cost can be reduced, and the clogging can be inspected without removing a plurality of inspection objects individually.

The figure which shows a valve block. Detailed view of the vicinity of the shaft of the MPV. The figure which MPV opened between the upper pipe and the lower pipe. 1 is an overall view of a clogging inspection device for an MPV main shaft.

Explanation of symbols

1 Valve Block 10 Clogging Inspection Device 11 Connection Port (Inflow Port)
12 Flow meter (flow rate measuring means)
13 Pressure gauge (pressure measuring means)
14 Supply port (supply section)
100 Mix-proof valve (valve)
110 Main shaft (shaft)

Claims (2)

An inspection method for inspecting clogging of each of a plurality of valve shafts provided in a valve block,
A connection port for connecting to a hose that draws water as a test liquid from the water supply, a flow meter for measuring a flow rate of water supplied through the connection port, a pressure gauge for measuring the pressure of the water, and A supply port that is connected to an injection port of the shaft and injects the water; a first cock that opens and closes between the flow meter and the pressure gauge; and a first cock that opens and closes between the pressure gauge and the supply port. An inspection apparatus configured to flow through the first cock, the pressure gauge, and the second cock in order by passing water through the flow meter and water flowing in from the connection port Prepare
Opening the first cock and closing the second cock, connecting the connection port to the hose and measuring the pressure of water supplied from the connection port as a static pressure; and By selecting any one of the shafts of the valve as an inspection object, connecting the supply port of the inspection device to the shaft and closing the first cock, the flow meter and the pressure gauge Confirming that the indicated value is 0, opening the first and second cocks, supplying the water into the shaft, measuring the flow rate of the water with the flow meter, Measuring the pressure of the water as a dynamic pressure by the pressure gauge, while repeating the shaft selected as the inspection target,
A valve shaft clogging inspection method characterized by inspecting clogging of the shafts of the plurality of valves one by one based on the static pressure, the flow rate, and the dynamic pressure measured for each shaft to be inspected. The shaft clogging inspection method according to claim 1, wherein the degree of clogging is ranked from the inspection result of the clogging of the shafts of the plurality of valves.

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