Online air tightness and flow integrated detection device for mold cooling water channel

Abstract

The invention discloses an online air tightness and flow integrated detection device for a mold cooling waterway, and relates to the technical field of mold air tightness and flow detection.The online air tightness and flow integrated detection device comprises a fixed table and a control module, a mounting block is fixedly connected to the upper side of the fixed table, and a clamping rod is in threaded connection with the inner wall of the upper side of the mounting block; the upper surface of the fixing table is fixedly connected with a rubber pad, the lower side of the fixing table is provided with a detection mechanism, and the detection mechanism comprises a connecting assembly, a water pump and an air pump. According to the utility model, a communication channel between the pressure storage tank and the outside can be quickly opened after detection is completed, so that high-speed airflow directly passes through a mold cooling water channel, internal residual moisture is subjected to on-line air-drying treatment, and the device has the advantage that on-line detection of flow and air tightness can be realized in the same device.

Description

Technical Field

[0001] This invention relates to the field of mold airtightness and flow rate detection technology, specifically to an online integrated airtightness and flow rate detection device for mold cooling water circuits. Background Technology

[0002] In molding processes such as injection molding and die casting, molds typically regulate temperature through internal cooling water channels. The smoothness and sealing of these cooling water channels directly affect the mold's service life and production stability. Therefore, before mold manufacturing is completed, before delivery for use, or during maintenance, it is usually necessary to inspect the mold's cooling water channels to confirm that they have normal cooling capacity and that there is no risk of leakage. Under current technological conditions, the testing of mold cooling water circuits is generally carried out in two independent steps according to a predetermined process: flow rate testing and airtightness testing. During flow rate testing, the mold cooling water circuit is usually connected to an external water source, and water is continuously supplied to the water circuit through a water pump. The water flows through the cooling channels inside the mold and then is discharged. Flow meters are then installed in the inlet or outlet pipes to judge the smoothness of the cooling water circuit. This stage of testing mainly focuses on whether there are blockages, local narrowing, or significantly low flow rates in the water circuit. After the test is completed, the water pump must be turned off and the water supply disconnected. After the flow rate test is completed, in order to avoid the water from affecting the airtightness test, it is usually necessary to drain the mold cooling water circuit, including natural drainage or simple purging of the water circuit by an external air source. Then, the mold cooling water circuit is reconnected to the airtightness test device. During the airtightness test, the test equipment uses an air pump to fill the mold cooling water circuit with compressed air, and closes the air intake channel after reaching the set pressure value, so that the cooling water circuit is in a closed state. Then, the pressure change in the system over time is monitored by a pressure gauge or pressure sensor to determine whether there is a leak. The above-mentioned testing process has a certain degree of maturity in practical applications, but its process characteristics determine that flow detection and air tightness detection are carried out separately under different media, different pipeline connection methods and different working conditions. Specifically, in the flow detection stage, the water circuit is in a state of continuous water flow, while in the air tightness detection stage, the water circuit is in a state of being emptied, statically filled with air and sealed and pressure-maintained. Not only does the medium change between the two tests, but the connection form between the testing device and the mold cooling water circuit also often needs to be readjusted. Based on this, existing air tightness testing usually adopts a constant air pressure testing method, that is, after one inflation is completed, the system pressure is kept relatively stable, and the sealing performance is judged by observing whether the pressure decreases. However, in the actual use of the mold, the internal pressure of the cooling water circuit is not constant, but changes frequently with the start and stop of the cooling water pump, flow adjustment, and multi-loop switching. The internal pressure exhibits a dynamic characteristic of periodic increase and decrease. Since the air tightness test and flow test are independent in the existing testing process, the flow change factor cannot be introduced in the air tightness test stage, resulting in a significant difference between the internal pressure state formed during the test and the actual cooling conditions of the mold. In addition, in existing airtightness testing devices, gas usually enters the mold cooling water circuit or testing chamber directly through pipelines. When the gas medium enters the closed space, it is easy to form a momentary impact, causing pressure fluctuations in the testing space. Without a buffer structure, the stability of the pressure signal mainly depends on the testing equipment itself, which can easily interfere with the testing results. Furthermore, after completing flow rate and airtightness testing, residual water often remains inside the mold cooling water circuit, especially in complex cooling water circuits or those with low-level channels. The water is difficult to completely drain and usually requires additional drying equipment or a separate processing step, which increases the post-testing operation steps and time costs. In summary, although existing mold cooling water circuit testing technology has achieved functional coverage of flow rate detection and airtightness detection in terms of process, its detection process is carried out in a step-by-step and separate manner, which naturally leads to a gap between the detection results and the actual operating state of the mold. This also exposes the need to further optimize the detection process and detection structure. Summary of the Invention

[0003] The purpose of this invention is to provide an online integrated airtightness and flow rate detection device for mold cooling water circuits, so as to solve the problems mentioned in the background art.

[0004] To solve the above technical problems, the present invention provides the following technical solution: an online airtightness and flow rate integrated detection device for mold cooling water circuit, including a fixed platform and a control module, an installation block is fixedly connected to the upper side of the fixed platform, a clamping rod is threadedly connected to the inner wall of the upper side of the installation block, a rubber pad is fixedly connected to the upper surface of the fixed platform, and a detection mechanism is provided on the lower side of the fixed platform. The detection mechanism includes a connecting component, a water pump, and an air pump. The water pump is used to input water flow into the cooling water circuit, and the air pump is used to input airflow into the cooling water circuit. The detection mechanism also includes a flow meter, which is used to detect the flow rate of the water output by the water pump. The detection mechanism also includes a pressure storage mechanism, which includes a pressure tank, a connecting component, and a pressure gauge. The pressure tank is used to contain airflow and water flow, and the pressure gauge is used to detect the internal pressure of the pressure tank.

[0005] According to the above technical solution, the clamping rod is used to fix the mold, and the control module is used to control the water pump, air pump and pressure gauge. The control module evaluates the airtightness by using the pressure data detected by the pressure gauge.

[0006] According to the above technical solution, the connecting assembly includes a turntable, the outer wall of which is rotatably connected to the inner wall of the fixed platform via bearings, an input pipe is fixedly connected to the inner wall of the turntable, the lower end of the input pipe extends through the turntable to the lower side of the turntable, a T-junction is provided at the lower end of the input pipe, the output end of the T-junction is connected to the lower end of the input pipe, and both input ends of the T-junction are provided with electrically controlled valves, the upper surfaces of the water pump and air pump are fixedly connected to the lower side of the fixed platform, the output ends of the water pump and air pump are respectively connected to the two input ends of the T-junction via a drain pipe and an air pipe, the input end of the water pump is fixedly connected to a water inlet pipe, a water tank is provided on the lower side of the fixed platform, and the interior of the water tank is connected to the lower end of the water inlet pipe.

[0007] According to the above technical solution, the connecting component further includes an output pipe, the lower end of which passes through the fixed platform and extends to the lower side of the fixed platform. A connecting pipe is fixedly connected to the lower end of the output pipe, and the other end of the connecting pipe is fixedly connected to the upper middle part of the pressure tank. The flow meter is located in the middle of the connecting pipe.

[0008] According to the above technical solution, the end of the connecting pipe away from the output pipe extends to the lower side of the inside of the pressure tank, and the pressure gauge is set on the upper side of the pressure tank. The detection end of the pressure gauge is located inside the pressure tank, and an installation hole is opened on the rear side of the pressure tank.

[0009] According to the above technical solution, a fixing pipe is fixedly connected to the inner wall of the mounting hole, a motor is fixedly connected to the lower surface of the fixing platform located above the fixing pipe, a threaded rod is fixedly connected to the output end of the motor, a sealing block is slidably connected inside the fixing pipe, a threaded cylinder is fixedly connected to the upper side of the sealing block, the inner wall of the threaded cylinder is threadedly connected to the outer wall of the threaded rod, an exhaust port is opened on the side wall of the fixing pipe located above the sealing block, a limiting cylinder is sleeved on the upper outer wall of the threaded cylinder, and the limiting cylinder is fixedly connected to the upper side of the outer wall of the pressure tank through a fixing bracket.

[0010] According to the above technical solution, the sealing block is made of rubber, and the inner wall of the limiting cylinder and the outer wall of the threaded cylinder are both hexagonal prism mechanisms. The motor control module is electrically connected, and the motor is used to drive the sealing block to rise and fall.

[0011] Compared with the prior art, the beneficial effects achieved by the present invention are: 1. By setting up a water pump, air pump, tee pipe, flow meter, and a switchable sealing structure consisting of a sealing block and an exhaust port, flow detection and air tightness detection can be completed sequentially in the same testing mechanism. Without changing the pipeline or altering the mold installation state, online integrated testing of the mold cooling water flow condition and sealing performance can be achieved, avoiding the inconsistency of operating conditions caused by traditional separate testing and improving the comparability and accuracy of the test results.

[0012] 2. By setting up a controllable lifting and pressure relief structure consisting of a motor, threaded rod, threaded cylinder and sealing block, and cooperating with an air pump to continuously supply air, the connection between the pressure tank and the outside can be quickly opened after the test is completed. This allows high-speed airflow to pass directly through the mold cooling water channel to dry the residual moisture inside online, thereby reducing cooling water retention, reducing corrosion risk and improving mold turnover efficiency.

[0013] 3. By extending the connecting pipe to the lower part of the pressure tank, the water generated during the flow detection stage is stored in the lower space inside the pressure tank. During the airtightness detection stage, the airflow passes through the water in the form of bubbles and enters the upper air chamber, thereby buffering and damping the gas flow, avoiding drastic pressure fluctuations caused by direct gas blowing, making the pressure changes obtained by the pressure gauge more stable, and significantly improving the authenticity and stability of the airtightness assessment.

[0014] 4. By setting up a sealing block that can be quickly raised and lowered to control the opening and closing of the exhaust port, and working in conjunction with the air pump, the pressure tank and mold cooling water circuit can achieve rapid pressurization and rapid depressurization in a short time. This simulates the internal pressure change caused by flow rate changes and start-stop switching during actual cooling operation, and detects the air tightness of the cooling water circuit under dynamic pressure conditions, effectively making up for the shortcomings of traditional static air tightness testing in reflecting dynamic leakage risks. Attached Figure Description

[0015] The accompanying drawings are provided to further illustrate the invention and form part of the specification. They are used in conjunction with embodiments of the invention to explain the invention and do not constitute a limitation thereof. In the drawings: Figure 1 This is a three-dimensional structural schematic diagram of the present invention; Figure 2 This is a schematic diagram of the lower structure of the present invention; Figure 3 This is a partial structural schematic diagram of the present invention; Figure 4 This is a schematic diagram of the detection mechanism structure of the present invention; Figure 5 This is an enlarged schematic diagram of the detection mechanism of the present invention; Figure 6 This is a schematic diagram of the internal structure of the pressure tank of the present invention; Figure 7 This is the present invention. Figure 6 A magnified structural diagram of A in the middle; In the diagram: 1. Fixed platform; 2. Mounting block; 3. Clamping rod; 4. Rubber pad; 5. Detection mechanism; 501. Turntable; 502. Input pipe; 503. T-connector; 504. Water pump; 505. Inlet pipe; 506. Water tank; 507. Drain pipe; 508. Electrically controlled valve; 509. Air pump; 510. Air pipe; 511. Output pipe; 512. Connecting pipe; 513. Flow meter; 514. Pressure storage mechanism; 401. Pressure tank; 402. Motor; 403. Threaded rod; 404. Fixed pipe; 405. Exhaust port; 406. Sealing block; 407. Threaded cylinder; 408. Limiting cylinder; 409. Fixing frame; 410. Pressure gauge. Detailed Implementation

[0016] The technical solutions of the embodiments of the present invention will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0017] Example 1: Please refer to Figure 1-7This invention provides a technical solution: an online integrated airtightness and flow rate testing device for mold cooling water circuits. In this embodiment, before testing, the mold to be tested is reliably fixed on the fixed platform 1 by clamping rod 3 and mounting block 2. The input pipe 502 and output pipe 511 in the testing mechanism 5 are respectively connected to the input side and output side of the cooling water circuit. Rubber pad 4 buffers the contact surface. The control module initializes the electric control valve 508, water pump 504, air pump 509, motor 402, and pressure gauge 410. At the start of testing, the control... The motor 402 in the pressure storage mechanism 514 drives the threaded rod 403 to move the threaded cylinder 407 upward, raising the sealing block 406 to the upper side of the exhaust port 405, thus connecting the pressure storage tank 401 to the outside. Then, the solenoid valve 508 at the connection between the three-way pipe 503 and the air circuit is closed, and the solenoid valve 508 at the connection between the three-way pipe 503 and the water circuit is opened. The turntable 501 can support a small angle change in the three-way pipe 503, activating the water pump 504. Water is drawn from the water tank 506, flowing through the inlet pipe 505, the input pipe 502, and the three-way pipe 507. 3. The water enters the mold cooling water circuit through the drain pipe 507. The flow rate is monitored in real time by the flow meter 513 located in the middle of the connecting pipe 512 to complete the flow test under normal cooling conditions. After the flow test is completed, the water pump 504 is turned off and the electric control valve 508 is switched to control the module drive motor 402 to reverse, causing the sealing block 406 to descend and seal the exhaust port 405. Then, the air pump 509 is started, and the gas enters the mold cooling water circuit through the air pipe 510, the input pipe 502, and the three-way pipe 503, and then enters the output pipe 511 and the connecting pipe 502. The system connects to pipe 512 and connects to the pressure tank 401. When the pressure gauge 410 detects that the pressure has reached the set value, the air pump 509 and the corresponding electric control valve 508 are shut down. The air tightness of the mold cooling water circuit is evaluated by monitoring the pressure change in the pressure tank 401 over time. After the test is completed, the system is reset and all actuators stop operating. Through this embodiment, the flow performance and air tightness performance of the mold cooling water circuit can be tested sequentially online under the same device and installation conditions, avoiding the problem of fragmented working conditions caused by traditional split testing.

[0018] Example 2: Please refer to Figure 1-7Based on Embodiment 1, this invention provides the following technical solution: After the mold completes flow rate and airtightness testing, it remains in a fixed state without disassembly or reconnection. The control module first drives the motor 402 to rotate. Since the limiting cylinder 408 limits the threaded cylinder 407 to prevent rotation, the threaded rod 403 will cause the threaded cylinder 407 to move upward, and the sealing block 406 will be lifted above the exhaust port 405, allowing the inside of the pressure tank 401 to connect with the outside and complete the initial depressurization. Then, the air pump 509 is turned on to continuously supply air without sealing and pressure maintenance. The high-speed airflow passes through the air pipe 510 and the three... The through pipe 503, inlet pipe 502, and outlet pipe 511 directly enter the mold cooling water circuit. Since the exhaust port 405 is open, the gas forms a stable flow in the cooling water channel and is discharged from the water channel outlet, thereby continuously blowing away and carrying out the residual water in the cooling water channel. After drying, the air pump 509 is turned off, the motor 402 is reset, and the sealing block 406 returns to its initial position. Through this embodiment, without adding additional equipment, the online drying treatment of the mold cooling water channel is realized by using the original detection air channel, reducing residual water retention and facilitating subsequent mold storage and corrosion prevention.

[0019] Example 3: Please refer to Figure 1-7 Based on Embodiments 1 and 2, this invention provides a new embodiment: In this embodiment, the connecting pipe 512 is extended to the lower side of the inside of the pressure tank 401, while the pressure gauge 410 and the fixing pipe 404 are located on the upper side of the pressure tank 401. During the flow detection stage, when the water pump 504 is working, part of the flow flows into the pressure tank 401 after passing through the mold cooling water path, forming a certain level of water stored in its lower internal space. Subsequently, the system switches to the airtightness detection mode, the sealing block 406 descends to close the exhaust port 405, and the air pump 509 supplies air into the system. The gas enters the storage tank through the cooling water path. When the pressure tank 401 is pressurized, it must first pass through the lower water body and rise into the upper air chamber in the form of bubbles. During this process, the water body plays a significant role in damping and buffering the airflow, making the pressure change of the gas entering the upper part of the pressure tank 401 more gradual. The pressure data obtained by the pressure gauge 410 is more stable and continuous. After the test is completed, the pressure is released or dried as needed. Through this embodiment, the pressure pulsation problem caused by direct gas blowing in the traditional pure gas path test is effectively avoided, making the airtightness test closer to the internal pressure change characteristics of the mold in the actual cooling cycle, thereby improving the authenticity and reliability of the test results.

[0020] Example 4: Please refer to Figure 1-7Based on Embodiments 1, 2, and 3, the present invention provides the following technical solution: In this embodiment, the mold is in an airtightness testing state, the sealing block 406 is in a descending position and forms a seal on the exhaust port 405. While the control module starts the air pump 509 to supply air, it controls the motor 402 to maintain the seal of the sealing block 406 on the exhaust port 405, thus forming a closed system with the pressure tank 401, cooling water circuit, and related air circuit spaces. This rapidly increases the internal pressure of the system, achieving a sudden increase in internal pressure. Subsequently, the control module drives the motor 402 to rotate rapidly in the forward direction, causing the threaded cylinder 407 to move upward. The sealing block 406 instantly disengages from the exhaust port 405, and the gas inside the pressure tank 401 flows through the exhaust port 405. The system pressure drops rapidly upon release, and then the reverse drive causes the sealing block 406 to re-close the exhaust port 405. Combined with the air pump 509 supplying air again, this process can repeatedly create multiple cycles of rapid pressurization and depressurization. During pressurization, the drive motor 402 reverses, causing the threaded cylinder 407 to make precise, minute pressure increases during either pressurization or pressure holding. Throughout the process, the pressure gauge 410 continuously collects pressure change data, which the control module uses to assess the airtightness of the mold cooling water circuit under frequent internal pressure fluctuations. This embodiment effectively simulates the characteristics of internal pressure fluctuations under actual cooling water circuit start-up / shutdown and flow rate fluctuations, overcoming the shortcomings of traditional static airtightness testing in reflecting dynamic leakage risks.

[0021] It should be noted that, in this document, relational terms such as "first" and "second" are used only to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such process, method, article, or apparatus.

[0022] Finally, it should be noted that the above descriptions are merely preferred embodiments of the present invention and are not intended to limit the present invention. Although the present invention has been described in detail with reference to the foregoing embodiments, those skilled in the art can still modify the technical solutions described in the foregoing embodiments or make equivalent substitutions for some of the technical features. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the protection scope of the present invention.

Claims

1. An integrated online airtightness and flow rate testing device for mold cooling water circuits, comprising a fixed platform (1) and a control module, characterized in that: A mounting block (2) is fixedly connected to the upper side of the fixed platform (1), and a clamping rod (3) is threadedly connected to the inner wall of the upper side of the mounting block (2). A rubber pad (4) is fixedly connected to the upper surface of the fixed platform (1), and a detection mechanism (5) is provided on the lower side of the fixed platform (1). The detection mechanism (5) includes a connecting component, a water pump (504), and an air pump (509). The water pump (504) is used to input water flow into the cooling water circuit, and the air pump (509) is used to input airflow into the cooling water circuit. The detection mechanism (5) also includes a flow meter (513), which is used to detect the flow rate of the water output by the water pump (504). The detection mechanism (5) further includes a pressure storage mechanism (514), which includes a pressure storage tank (401), a connecting component, and a pressure gauge (410). The pressure storage tank (401) is used to contain airflow and water flow, and the pressure gauge (410) is used to detect the internal pressure of the pressure storage tank (401).

2. The online airtightness and flow rate integrated detection device for mold cooling water circuits according to claim 1, characterized in that: The clamp (3) is used to fix the mold, and the control module is used to control the water pump (504), the air pump (509) and the pressure gauge (410). The control module evaluates the airtightness by using the pressure data detected by the pressure gauge (410).

3. The online airtightness and flow rate integrated detection device for mold cooling water circuits according to claim 2, characterized in that: The connecting assembly includes a turntable (501), the outer wall of which is rotatably connected to the inner wall of the fixed platform (1) via bearings. An input pipe (502) is fixedly connected to the inner wall of the turntable (501). The lower end of the input pipe (502) extends through the turntable (501) to the lower side of the turntable (501). A three-way pipe (503) is provided at the lower end of the input pipe (502). The output end of the three-way pipe (503) is connected to the lower end of the input pipe (502). Both input ends of the three-way pipe (503) are equipped with electrical control. The upper surfaces of the valve (508), the water pump (504) and the air pump (509) are fixedly connected to the lower side of the fixed platform (1). The output ends of the water pump (504) and the air pump (509) are respectively connected to the two input ends of the three-way pipe (503) through the drain pipe (507) and the air pipe (510). The input end of the water pump (504) is fixedly connected to the water inlet pipe (505). A water tank (506) is provided on the lower side of the fixed platform (1). The interior of the water tank (506) is connected to the lower end of the water inlet pipe (505).

4. The online airtightness and flow rate integrated detection device for mold cooling water circuits according to claim 3, characterized in that: The connecting assembly also includes an output pipe (511), the lower end of which passes through the fixed platform (1) and extends to the lower side of the fixed platform (1). A connecting pipe (512) is fixedly connected to the lower end of the output pipe (511), and the other end of the connecting pipe (512) is fixedly connected to the upper middle part of the pressure tank (401). The flow meter (513) is located in the middle of the connecting pipe (512).

5. The online airtightness and flow rate integrated detection device for mold cooling water circuits according to claim 4, characterized in that: The end of the connecting pipe (512) away from the output pipe (511) extends to the lower side inside the pressure tank (401), and the pressure gauge (410) is set on the upper side of the pressure tank (401). The detection end of the pressure gauge (410) is located inside the pressure tank (401), and an installation hole is provided on the rear side of the pressure tank (401).

6. The online airtightness and flow rate integrated detection device for mold cooling water circuits according to claim 5, characterized in that: A fixing pipe (404) is fixedly connected to the inner wall of the mounting hole. A motor (402) is fixedly connected to the lower surface of the fixing platform (1) at the upper side of the fixing pipe (404). A threaded rod (403) is fixedly connected to the output end of the motor (402). A sealing block (406) is slidably connected inside the fixing pipe (404). A threaded cylinder (407) is fixedly connected to the upper side of the sealing block (406). The inner wall of the threaded cylinder (407) is threadedly connected to the outer wall of the threaded rod (403). An exhaust port (405) is opened on the side wall of the fixing pipe (404) at the upper part of the sealing block (406). A limiting cylinder (408) is sleeved on the upper outer wall of the threaded cylinder (407). The limiting cylinder (408) is fixedly connected to the upper side of the outer wall of the pressure tank (401) through a fixing bracket (409).

7. The online integrated airtightness and flow rate detection device for mold cooling water circuits according to claim 6, characterized in that: The sealing block (406) is made of rubber, and the inner wall of the limiting cylinder (408) and the outer wall of the threaded cylinder (407) are both hexagonal prism mechanisms. The motor (402) is electrically connected to the control module and is used to drive the sealing block (406) to rise and fall.

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