Device suitable for constant pressure control of spunlace head of spunlace machine

Abstract

The utility model relates to a device suitable for constant pressure control of a spunlace head of a spunlace machine, which comprises a high-pressure water pump, a control cabinet, a first pressure sensor, a second pressure sensor, a pressure transmitting box, a first pressure transmission guide pipe and a second pressure transmission guide pipe, the pressure transmitting box is divided into a first pressure transmitting box area and a second pressure transmitting box area by the partition plate, the high-pressure water pump is connected with an inlet of the first pressure transmitting box area through a high-pressure pipeline, and the first pressure transmitting box area is connected with a water inlet of the high-pressure filter element through a first pressure transmission guide pipe; a second pressure transmission guide pipe is led out from a spunlace head space position between the water needle plate and the high-pressure filter element and is connected with a second area of the pressure transmitting box; a first pressure sensor and a second pressure sensor are respectively mounted on the first pressure transmitting box area and the second pressure transmitting box area; the first pressure sensor and the second pressure sensor communicate with the control cabinet. The pressure of a water column sprayed to a product by the spunlace machine through the water needle plate is kept stable, and finally the product quality is guaranteed.

Description

Technical field:

[0001] The utility model belongs to the technical field of spunlace production equipment in the spunlace industry, and specifically relates to a device suitable for constant pressure control of the spunlace head of a spunlace machine. The purpose is to control the pressure of the water column ejected by the spunlace machine through the water needle plate so that it will no longer be affected by the blockage of the pipeline and the filter element, maintain the constant pressure of the spunlace head cavity, and ensure the stable quality of the product. Background technology:

[0002] The existing spunlace production line installs a pressure sensor in the front section of the high-pressure filter element of the spunlace machine to detect the pressure value entering the high-pressure filter element. The pressure sensor transmits the pressure value to the pressure control system of the high-pressure water pump. The pressure control system adjusts the operating frequency of the high-pressure water pump to keep the pressure value constant. However, since the pressure sensor is located on the front section of the high-pressure pipeline of the high-pressure filter element and before the filter element, this pressure value cannot truly reflect the pressure of the spunlace head cavity. However, the spunlace needle plate is located after the high-pressure filter element in the process. When the filter element is blocked, the pipeline pressure is always automatically controlled by the pressure sensor in the front section of the filter element to remain unchanged. As the filter element becomes more and more blocked, the pressure in the spunlace head cavity becomes lower and lower, causing the pressure of the water column ejected from the water needle plate installed in the spunlace head cavity to become lower and lower, thereby affecting the product quality. Utility model content:

[0003] In view of the deficiencies in the prior art, the technical problem that the utility model intends to solve is to provide a device suitable for constant pressure control of the water jet head of a water jetting machine, so as to maintain a stable pressure of the water column sprayed by the water jet plate onto the product by the water jetting machine, and ultimately ensure product quality.

[0004] The utility model solves the technical problem by adopting the following technical solutions:

[0005] In the first aspect, the utility model provides a device suitable for constant pressure control of a water jet head of a water jet machine, comprising a high-pressure water pump and a control cabinet, characterized in that the device further comprises a first pressure sensor 11, a second pressure sensor 10, a pressure transmission box, a first pressure transmission conduit 7, and a second pressure transmission conduit 8, wherein the pressure transmission box has a partition, and the partition divides the pressure transmission box into a pressure transmission box zone 12 and a pressure transmission box zone 2 9, the high-pressure water pump 4 is connected to the inlet of the pressure transmission box zone 12 through a high-pressure pipeline 13, and the outlet of the pressure transmission box zone 12 is connected to the water inlet of the high-pressure filter element 5 through the first pressure transmission conduit 7;

[0006] A second pressure transmission conduit 8 is connected to the space between the water needle plate 6 and the high-pressure filter element, and the other end of the second pressure transmission conduit is connected to the second zone 9 of the pressure transmission box;

[0007] A first pressure sensor 11 and a second pressure sensor 10 are installed on the pressure transmission box zone 12 and the pressure transmission box zone 2 9 respectively; the first pressure sensor 11 and the second pressure sensor 10 communicate with the control cabinet.

[0008] The control cabinet includes a single chip microcomputer, a display screen and an alarm indicator light. The single chip microcomputer communicates with the display screen, the alarm indicator light and the high-pressure water pump. The single chip microcomputer is connected to the first pressure sensor 11 and the second pressure sensor 10.

[0009] The display screen has a real-time pressure display area for the first pressure sensor 11 , a real-time pressure display area for the second pressure sensor 10 , a pressure difference display area for the two, and a pressure difference threshold setting area.

[0010] A protective cover 13 is disposed outside the first pressure sensor 11 and the second pressure sensor 10 .

[0011] The protective cover is a stainless steel protective cover.

[0012] In a second aspect, the utility model provides a water jetting machine equipped with the above-mentioned water jetting head constant pressure control device.

[0013] Compared with the prior art, the beneficial effects of the utility model are:

[0014] The utility model can detect the pressure at the water needle plate in real time, and utilize the regulation of the operating frequency of the high-pressure water pump to ensure the pressure at the water needle plate. Even if the high-pressure filter element is slightly blocked during the production process, the pressure at the water needle plate can be ensured by adjusting the operating frequency of the high-pressure water pump, which can reduce the number of normal shutdowns for filter element replacement and ensure the stability of product quality, and facilitate the installation and operation of the equipment. Description of the drawings:

[0015] Figure 1 Schematic diagram of the structure of the existing high-pressure filter element and water-jet needle plate pressure control device.

[0016] Figure 2 The utility model is a structural schematic diagram of a device for constant pressure control of a water jet head of a water jet machine.

[0017] In the figure, 1. water jet head; 2. pressure sensor; 3. high-pressure pipeline; 4. high-pressure water pump; 5. high-pressure filter element; 6. water jet plate; 7. first pressure transmission conduit; 8. second pressure transmission conduit; 9. pressure transmission box zone 2; 10. second pressure sensor; 11. first pressure sensor; 12. pressure transmission box zone 1; 13. protective cover. Specific implementation method:

[0018] The present invention is further explained below in conjunction with the embodiments and drawings, but this is not intended to limit the scope of protection of the present application.

[0019] A high-pressure filter element 5 and a water needle plate 6 are arranged side by side inside the cavity of the water jet head 1. The water inlet of the high-pressure filter element 5 is directly connected to a high-pressure water pump 4 through a high-pressure pipeline 3. A pressure sensor 2 is installed on the high-pressure pipeline near the water inlet of the high-pressure filter element (see Figure 1 The operation process of the existing equipment is: set the pressure setting value of the pressure sensor 2, and use this pressure setting value as the ideal working water pressure. The high-pressure water pumped out by the high-pressure water pump 4 passes through the high-pressure pipe 3, penetrates through the high-pressure filter element 5 to the water needle plate 6, and the high-pressure water is further ejected through the pinholes of the water needle plate 6 under the high-pressure state.

[0020] It can be seen from the above operation process that the high-pressure water falling on the water needle plate is water that has been processed by the high-pressure filter element 5, which is equivalent to being located in the later process of the high-pressure filter element. The pressure value of the pressure sensor 2 cannot detect the actual pressure value at the water needle plate 6. In this way, whether the high-pressure filter element needs to be replaced can only be judged by on-site personnel based on on-site production and observing the changes in product quality. There is no standard value for judging whether the filter element needs to be replaced.

[0021] If the pre-filtration system for on-site production water does not work well, the quality of production water will be poor, and the impurities in the water will be intercepted by the permeable filter membrane of the high-pressure filter element 5, which will easily cause the high-pressure filter element 5 to be blocked. Sometimes the blockage is more obvious within less than 1 day of operation. In addition, if the high-pressure filter element is not cleaned properly, the impurities in the water will be washed to the high-pressure filter element 5, which will more easily cause the high-pressure filter element 5 to be blocked, and the high-pressure filter element will be blocked in less than half a day.

[0022] Since there is no actual detection and control of the water pressure at the water jet plate 6 installed in the cavity of the water jet head 1, the on-site personnel can only ensure the operation of production by daily stopping the machine to replace the filter element according to the actual production situation, and cannot control the quality in time, which not only delays the production but also cannot ensure the stability of product quality.

[0023] The utility model is suitable for a device for controlling the constant pressure of the water jet head of a water jet machine (see Figure 2 ), including a first pressure sensor 11, a second pressure sensor 10, a pressure transmission box, a first pressure transmission conduit 7, a second pressure transmission conduit 8 and a high-pressure water pump, wherein the pressure transmission box has a partition, which divides the pressure transmission box into a pressure transmission box zone 12 and a pressure transmission box zone 2 9, the high-pressure water pump 4 is connected to the inlet of the pressure transmission box zone 12 through a high-pressure pipeline 13, and the outlet of the pressure transmission box zone 12 is connected to the water inlet of the high-pressure filter element 5 through the first pressure transmission conduit 7;

[0024] A second pressure transmission conduit 8 is connected to the space between the water needle plate 6 and the high-pressure filter element, and the other end of the second pressure transmission conduit is connected to the second zone 9 of the pressure transmission box;

[0025] A first pressure sensor 11 and a second pressure sensor 10 are installed on the pressure transmitter box zone 12 and the pressure transmitter box zone 2 9 respectively; the first pressure sensor 11 and the second pressure sensor 10 communicate with the single chip microcomputer in the control cabinet through a signal line or wirelessly.

[0026] In addition, a protective cover 13 is disposed outside the first pressure sensor 11 and the second pressure sensor 10 .

[0027] After the high-pressure water pump 4 passes through the first pressure transmission box area 12 and then through the first pressure transmission conduit 7, the water is directly pumped into the high-pressure filter element 5. The water entering the high-pressure filter element 5 is in a high-pressure state and directly penetrates into the water needle plate 6 through the permeable membrane of the high-pressure filter element. Finally, the high-pressure water passes through the pinholes of the water needle plate to form a high-pressure water column and is directly sprayed onto the product, finally completing the water entanglement work.

[0028] The utility model adds two pressure transmission conduits to each water jet head, one end of the two pressure transmission conduits is installed at the water jet head, and the other end is connected to the two areas of the pressure transmission box, so that the water jet head and the pressure transmission box are connected together, wherein the second pressure transmission conduit 8 connects the water jet head and the second area 9 of the pressure transmission box to form a communicating vessel, which can detect the pressure of the water jet head cavity, and truly reflects the pressure on the water jet plate.

[0029] The PID constant pressure control program is loaded in the single chip microcomputer. The PID constant pressure control program is a closed loop program. This is an existing program. The pressure difference threshold of the first pressure sensor 11 and the second pressure sensor 10 is set. The single chip microcomputer collects the pressure values ​​of the first pressure sensor 11 and the second pressure sensor 10 in real time, and calculates the pressure difference value in real time. The magnitude of the pressure difference value is used to warn whether the high-pressure filter element is blocked and whether the filter element needs to be replaced. The PID constant pressure control program controls the operating frequency of the high-pressure water pump by feeding back the pressure difference between the front section of the high-pressure filter element and the cavity of the water jet head to ensure the constant pressure of the cavity of the water jet head, which also ensures the constant pressure of the water column on the water jet plate 6, so as to ensure the stability of the pressure of the water in the water jet cavity sprayed out through the water jet plate to the surface of the product cloth, and finally ensure the stability of the product quality.

[0030] After the first pressure sensor 11 and the second pressure sensor 10 are installed on the sides of the pressure transmitter box, a stainless steel protective cover 13 is installed outside to protect the two pressure sensors from being splashed with water. The protective cover can also play a role in waterproofing and moisture-proofing the two electrical components.

[0031] The control cabinet also includes a display screen, and the single chip microcomputer is electrically connected to the display screen. The display screen can display the real-time pressure value of the first pressure sensor 11 and the second pressure sensor 10, and the difference between the two, so that the on-site operator can view them intuitively and display them in digital form. In addition, the display screen also has a pressure difference threshold setting area, and the on-site operator can actually set it according to the actual production situation on site.

[0032] The single chip microcomputer is electrically connected to the high pressure water pump 4 and the alarm indicator light, and adjusts the operating frequency of the high pressure water pump 4 and reminds whether to replace the high pressure filter element according to the pressure difference between the first pressure sensor 11 and the second pressure sensor 10.

[0033] The pressure difference threshold includes a first pressure difference threshold and a second pressure difference threshold. When the pressure difference exceeds the first pressure difference threshold, it indicates that there is a blockage and the operating frequency of the high-pressure water pump needs to be adjusted. When it exceeds the second pressure difference threshold, an alarm will automatically sound to remind on-site personnel to replace the high-pressure filter element.

[0034] The operating frequency of the high-pressure water pump 4 is adjusted according to the magnitude of the pressure difference, thereby ensuring the water pressure value at the water needle plate 6 installed in the water jet head cavity.

[0035] Anything not described in the present invention is applicable to the prior art.

Claims

1. A device suitable for constant pressure control of a water jet spunlacing machine, comprising a high pressure water pump and a control cabinet, characterized in that: The device also includes a first pressure sensor, a second pressure sensor, a pressure transmission box, a first pressure transmission conduit, and a second pressure transmission conduit. The pressure transmission box has a partition, which divides the pressure transmission box into a first pressure transmission box area and a second pressure transmission box area. The high-pressure water pump is connected to the inlet of the first pressure transmission box area through a high-pressure pipeline, and the outlet of the first pressure transmission box area is connected to the water inlet of the high-pressure filter element through the first pressure transmission conduit. A second pressure transmission conduit is connected to the space between the water jet plate and the high-pressure filter element, and the other end of the second pressure transmission conduit is connected to the second zone of the pressure transmitter box; A first pressure sensor and a second pressure sensor are installed on the first zone of the pressure transmitter box and the second zone of the pressure transmitter box respectively; the first pressure sensor and the second pressure sensor communicate with the control cabinet.

2. The device for constant pressure control of a water jet spunlacing machine according to claim 1, characterized in that: The control cabinet comprises a single chip microcomputer, a display screen and an alarm indicator light. The single chip microcomputer communicates with the display screen, the alarm indicator light and the high pressure water pump, and the single chip microcomputer is connected with a first pressure sensor and a second pressure sensor.

3. The device for constant pressure control of a water jet spunlacing machine according to claim 2, characterized in that: The display screen has a real-time pressure display area for the first pressure sensor, a real-time pressure display area for the second pressure sensor, a pressure difference display area for the two, and a pressure difference threshold setting area.

4. The device for constant pressure control of a water jet head of a water jet machine according to claim 1, characterized in that: Protective covers are arranged outside the first pressure sensor and the second pressure sensor.

5. The device for constant pressure control of the water jet head of a water jet machine according to claim 4, characterized in that: The protective cover is a stainless steel protective cover.

6. A water spunlace machine, characterized in that: The water jet machine is equipped with a water jet head constant pressure control device as described in any one of claims 1-5.

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