An operation detection mechanism for a water jet cutting gun head

Abstract

The present invention discloses an operation detection mechanism for a waterjet cutting gun head. The mechanism is arranged on the gun head body and the gun head cap assembly, and includes a negative pressure combination channel, a connecting pipe, and a negative pressure detector. The negative pressure combination channel is arranged in the gun head cap assembly and is capable of detecting the negative pressure caused by high-pressure water outlet. One end of the connecting pipe is connected to the outlet of the negative pressure combination channel, and the other end is connected to the negative pressure detector. The negative pressure detector feeds back alarm information to the equipment's electronic control system. The operation detection mechanism for a waterjet cutting gun head of the present invention detects negative pressure at the water outlet nozzle, provides timely warnings, and prevents cutting failures due to insufficient water pressure, thereby improving the safe operation performance of the equipment.

Description

Technical Field

[0001] The present invention relates to the technical field of water cutting, in particular to an operation detection mechanism for a water cutting gun head. Background Art

[0002] Waterjet cutting, also known as waterjet, is a high-pressure water jet cutting technology that utilizes high-pressure water jets. Under computer control, it can sculpt workpieces to any desired degree, with minimal impact on material quality. Due to its low cost, ease of operation, and high yield rate, waterjet cutting is becoming a mainstream cutting method in industrial cutting technology.

[0003] Existing waterjet cutting guns use a pneumatic needle valve to control the flow of high-pressure water. High-pressure water, carrying abrasive, is ejected from the nozzle's central orifice to cut the material. However, in some cases, equipment failure may cause a drop in water pressure. If the waterjet cutting machine follows the programmed trajectory during this situation, the cut may be incomplete, the kerf may fail, and damage may occur to the workpiece.

[0004] Therefore, it is necessary to develop a water jet cutting gun head operation detection mechanism. Summary of the Invention

[0005] The purpose of the present invention is to provide an operation detection mechanism for a water cutting gun head, which performs negative pressure detection on the water outlet nozzle, provides timely warning, prevents cutting failure due to insufficient water pressure, and improves the safe operation performance of the equipment.

[0006] In order to solve the above technical problems, the present invention adopts the following technical solutions:

[0007] The present invention provides an operation detection mechanism for a water cutting gun head, which is arranged on the gun head body and the gun head cap assembly, and includes a negative pressure combination channel, a connecting pipe and a negative pressure detector. The negative pressure combination channel is arranged in the gun head cap assembly and can detect the negative pressure caused by high-pressure water outlet; one end of the connecting pipe is connected to the outlet of the negative pressure combination channel and the other end is connected to the negative pressure detector, and the negative pressure detector feeds back alarm information to the equipment electronic control system.

[0008] Furthermore, the gun head cap assembly includes a coaxially assembled gun head cap, a water nozzle, a wear-resistant part and a pressing part, all of which have a center hole. The upper threaded connection hole of the gun head cap is connected to the bottom threaded pipe section of the gun head body to introduce high-pressure water; the water nozzle, wear-resistant part and pressing part are nested in the center hole at the bottom end of the gun head cap, and the pressing part presses the wear-resistant part into the top circular groove of the water nozzle; the upper outer wall ring step of the water nozzle is pressed against the top surface of the center hole at the bottom end of the gun head cap, and the top of the water nozzle is set to a conical surface and is sealed with the bottom conical surface of the bottom threaded pipe section; the center hole of the water nozzle serves as a water outlet.

[0009] Furthermore, the diameter of the center hole of the wear-resistant part is smaller than that of the water outlet.

[0010] Furthermore, the negative pressure combination channel includes a transverse connecting hole, a transverse hole and a longitudinal hole. The transverse connecting hole is opened on the water nozzle perpendicular to the water outlet and is connected to the water outlet. The transverse hole is opened on the side wall of the gun head cap and one end is connected to the transverse connecting hole and the other end is connected to the longitudinal hole. The longitudinal hole is axially opened on the side wall of the water nozzle, and the outlet of the longitudinal hole is connected to the connecting pipe.

[0011] Furthermore, the negative pressure combination channel also includes an outer ring groove, which is opened on the outer side wall of the water nozzle and is arranged at the end outlet position of the transverse connecting hole.

[0012] Furthermore, the outlet end of the longitudinal hole is configured as a threaded hole and is connected to the connecting pipe via a threaded pipe joint. The connecting pipe is specifically a hose made of a flexible material.

[0013] Furthermore, the negative pressure detector is installed on the sand adding block on the upper part of the gun head body.

[0014] Furthermore, it also includes a water leakage detection structure, which is arranged on the gun head cap assembly and can detect the sealing performance of the gun head body and the gun head cap assembly.

[0015] Furthermore, the water leakage detection structure includes an inner ring groove and an observation hole. The inner ring groove is opened above the center hole at the bottom end of the gun head cap and is located below the sealing cone surface of the water nozzle. The observation hole is opened horizontally on the side wall of the gun head cap and the inner end is connected to the inner ring groove.

[0016] Furthermore, the gun head cap is provided with a flat platform at the outer port of the observation hole and at a position opposite thereto.

[0017] Compared with the prior art, the present invention has the following beneficial technical effects:

[0018] The present invention provides an operation detection mechanism for a waterjet cutting gun head. The mechanism collects the negative pressure caused by high-pressure water in the surrounding space through the negative pressure combination channel. A negative pressure detector detects the negative pressure and compares it with a set parameter range. If the negative pressure exceeds the range, an alarm is issued and feedback is provided to the equipment's electronic control system, triggering an emergency shutdown. This prevents further losses caused by insufficient water pressure. The present invention provides an operation detection mechanism for a waterjet cutting gun head by detecting negative pressure at the water outlet nozzle, providing timely warnings to prevent cutting failures caused by insufficient water pressure, thereby improving the safe operation of the equipment.

[0019] Furthermore, the wear-resistant and compression members are nested within the circular groove at the top of the faucet. The wear-resistant member is made of a high-hardness gemstone material, and its central hole diameter is smaller than the outlet. This creates a bottleneck effect that constrains water flow and reduces impact wear on the outlet. The transverse connecting hole, through the Venturi effect, creates a negative pressure zone around the vertically downward jetting water flow. The negative pressure range varies with flow rate. The transverse and longitudinal holes are designed to channel the negative pressure to the top of the gun cap, where it connects to the connecting pipe, resulting in a compact and efficient design. The outer annular groove centrally connects the transverse and transverse connecting holes, allowing for direct connection during faucet installation, even if the transverse and transverse holes are not directly connected, thus simplifying assembly requirements. The outlet of the longitudinal hole is threaded, facilitating installation of a threaded pipe fitting and a connecting pipe. Using a flexible hose for the connecting pipe makes installation convenient and reliable. By placing the negative pressure detector on the gun head body, the connecting pipe length can be reduced as the cutting gun head moves, shortening the negative pressure response distance and ensuring a more rapid and reliable alarm response. Through the setting of the water leakage detection structure, the sealing performance of the gun head body and the gun head cap assembly can be detected to ensure the safe operation of the equipment; the water leakage detection structure composed of the inner ring groove and the observation hole is easy to process and realize, and the feedback is direct and easy to observe; the setting of two flat platforms facilitates the processing of the observation hole, and at the same time serves as the wrench mounting position during disassembly and installation, greatly improving the disassembly and installation efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] The present invention will be further described below with reference to the accompanying drawings.

[0021] Figure 1 This is a schematic diagram of the three-dimensional structure of the operation detection mechanism for the water jet cutting gun head of the present invention;

[0022] Figure 2 This is a schematic diagram of the main structure of the operation detection mechanism for the water jet cutting gun head of the present invention;

[0023] Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the AA part;

[0024] Figure 4 This is a schematic diagram of the three-dimensional structure of the gun head cap assembly of the present invention;

[0025] Figure 5 This is a schematic diagram of the gun head cap assembly from a bottom view;

[0026] Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of the middle BB part;

[0027] Figure 7 for Figure 5 Schematic diagram of the cross-sectional structure of the CC part.

[0028] Explanation of the accompanying symbols: 1. Gun head body; 101. Bottom threaded pipe section; 2. Pneumatic head; 3. Gun head cap; 301. Threaded connection hole; 302. Observation hole; 303. Flat platform; 304. Inner ring groove; 305. Horizontal hole; 306. Vertical hole; 4. Water nozzle; 401. Water outlet; 402. Horizontal connecting hole; 403. Outer ring groove; 5. Wear-resistant part; 6. Pressing part; 7. Negative pressure detector; 8. Connecting pipe. DETAILED DESCRIPTION

[0029] The core of the present invention is to provide an operation detection mechanism for a water cutting gun head, which performs negative pressure detection on the water outlet nozzle, provides timely warning, and prevents cutting failure due to insufficient water pressure, thereby improving the safe operation performance of the equipment.

[0030] The following will be combined with the accompanying drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0031] In the description of the present invention, it should be understood that the terms "upper", "lower", "front", "back", "left", "right", "top", "bottom", "inside", "outside", etc., indicating directions or positional relationships, are based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore should not be understood as limiting the present invention.

[0032] With reference to the accompanying drawings, Figure 1 This is a schematic diagram of the three-dimensional structure of the operation detection mechanism for the water jet cutting gun head of the present invention; Figure 2 This is a schematic diagram of the main structure of the operation detection mechanism for the water jet cutting gun head of the present invention; Figure 3 for Figure 2 Schematic diagram of the cross-sectional structure of the AA part; Figure 4 This is a schematic diagram of the three-dimensional structure of the gun head cap assembly of the present invention; Figure 5 This is a schematic diagram of the gun head cap assembly from a bottom view; Figure 6 for Figure 5 Schematic diagram of the cross-sectional structure of the middle BB part; Figure 7 for Figure 5 Schematic diagram of the cross-sectional structure of the CC part.

[0033] In one embodiment, Figures 1 to 3As shown, a waterjet cutting gun head operation detection mechanism is installed on the gun head body 1 and the gun head cap assembly, including a negative pressure combination channel, a connecting pipe 8, and a negative pressure detector 7. The negative pressure combination channel is located within the gun head cap assembly and can detect the negative pressure caused by the high-pressure water discharge in real time. One end of the connecting pipe 8 is connected to the outlet of the negative pressure combination channel, and the other end is connected to the negative pressure detector 7. The negative pressure detector 7 feeds back alarm information to the equipment's electronic control system and can also generate an audible and visual alarm.

[0034] The negative pressure generated by the high-pressure water in the surrounding space is collected through the negative pressure combination channel. After detecting the negative pressure, the negative pressure detector 7 compares it with the set parameter range. If it exceeds the range, an alarm is issued and feedback is fed back to the equipment's electronic control system for emergency shutdown, thereby preventing further losses caused by insufficient water pressure. The waterjet cutting gun head of the present invention uses an operation detection mechanism to detect negative pressure at the water outlet nozzle, providing timely warnings to prevent cutting failures due to insufficient water pressure, thereby improving the safe operation performance of the equipment.

[0035] In one embodiment of the present invention, Figures 3 to 7 As shown, the gun head cap assembly includes a coaxially assembled gun head cap 3, a water nozzle 4, a wear-resistant part 5 and a pressing part 6, all of which have a center hole. The upper threaded connection hole 301 of the gun head cap 3 is connected to the bottom threaded pipe section 101 of the gun head body 1 and introduces high-pressure water. The water nozzle 4, the wear-resistant part 5 and the pressing part 6 are nested in the center hole at the bottom end of the gun head cap 3. The pressing part 6 is in the form of a press sleeve and presses the wear-resistant part 5 into the top circular groove of the water nozzle 4. The upper outer wall ring step of the water nozzle 4 is pressed against the top surface of the center hole at the bottom end of the gun head cap 3. The top of the water nozzle 4 is set as a conical surface and is sealed with the bottom conical surface of the bottom threaded pipe section 101. The center hole of the water nozzle 4 serves as the water outlet 401.

[0036] Specifically, the diameter of the middle hole of the wear-resistant part 5 is smaller than that of the water outlet 401 , and the wear-resistant part 5 is made of a high-hardness gem material.

[0037] The wear-resistant part 5 and the pressing part 6 are nested in the top circular groove of the water nozzle 4. The wear-resistant part 5 is made of high-hardness gem material and the hole diameter is smaller than the water outlet 401. It can form a bottleneck effect to restrict the water flow and reduce the impact wear on the water outlet 401.

[0038] In one embodiment of the present invention, Figure 4 、 Figure 6 and Figure 7As shown, the negative pressure combined channel includes a transverse connecting hole 402, a transverse hole 305, and a longitudinal hole 306. The transverse connecting hole 402 is provided on the nozzle 4 perpendicular to the water outlet 401 and is connected to the water outlet 401. The transverse hole 305 is provided on the side wall of the gun cap 3 and is connected to the transverse connecting hole 402 at one end and the longitudinal hole 306 at the other end. The longitudinal hole 306 is provided axially on the side wall of the nozzle 4, and the outlet of the longitudinal hole 306 is connected to the connecting pipe 8. The end of the transverse hole 305 on the side wall of the gun cap 3 is sealed by a plugging measure.

[0039] Specifically, if Figure 6 and Figure 7 As shown, the negative pressure combined channel further includes an outer annular groove 403, which is formed on the outer side wall of the faucet 4 and is arranged at the end outlet position of the transverse connecting hole 402. That is, the outer annular groove 403 connects the transverse hole 305 and the transverse connecting hole 402.

[0040] Specifically, if Figure 7 As shown, the outlet end of the longitudinal hole 306 is set as a threaded hole and is connected to the connecting pipe 8 through a threaded pipe joint. The connecting pipe 8 is specifically a hose made of flexible material.

[0041] By opening the transverse connecting hole 402, according to the Venturi effect, a negative pressure space is formed around the water flow of the vertically downward spraying water outlet 401. Different flow rates result in different negative pressure ranges. By setting the transverse hole 305 and the longitudinal hole 306, the negative pressure is drained to the top of the gun head cap 3 and then connected to the connecting pipe 8, which takes up little space and has a compact and reasonable structure. By setting the outer ring groove 403, the transverse hole 305 and the transverse connecting hole 402 are centrally connected. Even if the transverse connecting hole 402 and the transverse hole 305 are not directly connected when the water nozzle 4 is installed, it does not matter, which reduces the assembly requirements. The outlet end of the longitudinal hole 306 is set as a threaded hole, which is convenient for installing the connecting pipe 8 after the threaded pipe joint. The connecting pipe 8 using a hose is convenient and reliable to install.

[0042] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the negative pressure detector 7 is installed on the side of the square sand block on the upper part of the gun head body 1.

[0043] By arranging the negative pressure detector 7 on the gun head body 1, as the cutting gun head moves, the length of the connecting pipe 8 can be reduced, the negative pressure reaction distance can be shortened, and the alarm reaction can be faster and more reliable.

[0044] In one embodiment of the present invention, Figure 1 and Figure 2 As shown, the operation detection mechanism for the waterjet cutting gun head of the present invention further includes a water leakage detection structure, which is arranged on the gun head cap assembly and can detect the sealing performance of the gun head body 1 and the gun head cap assembly.

[0045] Specifically, if Figure 4 and Figure 6 As shown, the water leakage detection structure includes an inner ring groove 304 and an observation hole 302. The inner ring groove 304 is opened above the middle hole at the bottom end of the gun head cap 3 and is located below the sealing cone surface of the water nozzle 4. The observation hole 302 is opened horizontally on the side wall of the gun head cap 3 and the inner end is connected to the inner ring groove 304.

[0046] When leakage occurs at the sealing joint between the water nozzle 4 and the bottom conical surface of the bottom threaded pipe section 101, water will enter the inner ring groove 304 and overflow through the observation hole 302, prompting the operator to replace the water nozzle 4.

[0047] Specifically, if Figure 4 and Figure 5 As shown, the gun head cap 3 is provided with a flat platform 303 at the outer end of the observation hole 302 and at the opposite position thereof.

[0048] Through the setting of the water leakage detection structure, the sealing performance of the gun head body 1 and the gun head cap assembly can be detected to ensure the safe operation of the equipment; the water leakage detection structure composed of the inner ring groove 304 and the observation hole 302 is easy to process and realize, and the feedback is direct and easy to observe; through the setting of two flat platforms 303, it is easy to process the observation hole 302, and at the same time it serves as a wrench mounting position during disassembly and installation, which greatly improves the disassembly and installation efficiency.

[0049] The working process of the operation detection mechanism for the water cutting gun head of the present invention is as follows: During normal operation of the equipment, the pneumatic head 2 is actuated to open the needle valve, and the high-speed water flow carries the abrasive particles from the gun head body 1 into the gun head cap assembly. The high-speed water flow first passes through the hole in the wear-resistant part 5 and then flows through the water outlet 401 of the water nozzle 4. The transverse connecting hole 402 that passes through the water outlet 401 forms a negative pressure space around the water flow of the water outlet 401 that is sprayed vertically downward according to the Venturi effect. Different flow rates will generate different negative pressure ranges. The negative pressure is transmitted through the transverse hole 305, the vertical hole 306 and the connecting pipe 8 and fed back to the negative pressure detector 7. The negative pressure detector 7 determines whether to issue an alarm based on the detected negative pressure value and the set range.

[0050] The water cutting gun head of the present invention uses an operation detection mechanism to collect the negative pressure caused by the high-pressure water in the surrounding space through the negative pressure combination channel. After the negative pressure is detected, the negative pressure detector 7 compares it with the set parameter range. When it exceeds the range, an alarm is issued and feedback is given to the equipment electronic control system for emergency shutdown, thereby avoiding the expansion of losses caused by insufficient water pressure. The water cutting gun head of the present invention uses an operation detection mechanism to detect the negative pressure at the water outlet nozzle, and timely warns to prevent cutting failures due to insufficient water pressure, thereby improving the safe operation performance of the equipment. In addition, the wear-resistant part 5 and the clamping part 6 are nested in the top circular groove of the water nozzle 4. The wear-resistant part 5 is made of high-hardness gem material and the hole diameter is smaller than the water outlet 401. It can form a bottleneck to constrain the water flow and reduce the impact wear on the water outlet 401. By opening the transverse connecting hole 402, according to the Venturi effect, a negative pressure space is formed around the water flow of the water outlet 401 that is sprayed vertically downward. The flow rate is different, and the negative pressure range is also different. By setting the transverse hole 305 and the longitudinal hole 306, the negative pressure is drained to the top of the gun head cap 3 and then connected to the connecting pipe 8, which takes up little space and has a compact and reasonable structure. By setting the outer ring groove 403, the transverse hole 305 and the transverse connecting hole 402 are centrally connected. Even if the transverse connecting hole 402 and the transverse hole 305 are not directly connected when the water nozzle 4 is installed, it does not matter, which reduces the assembly requirements. The outlet end of the longitudinal hole 306 is set as a threaded hole, which is convenient for installing the connecting pipe 8 after the threaded pipe joint. The connecting pipe 8 uses a hose, which is convenient and reliable to install. By setting the negative pressure detector 7 on the gun head body 1, as the cutting gun head moves, the length of the connecting pipe 8 can be reduced, the negative pressure reaction distance can be shortened, and the alarm reaction is more rapid and reliable. Through the setting of the water leakage detection structure, the sealing performance of the gun head body 1 and the gun head cap assembly can be detected to ensure the safe operation of the equipment; the water leakage detection structure composed of the inner ring groove 304 and the observation hole 302 is easy to process and realize, and the feedback is direct and easy to observe; through the setting of two flat platforms 303, it is easy to process the observation hole 302, and at the same time it serves as a wrench mounting position during disassembly and installation, which greatly improves the disassembly and installation efficiency.

[0051] The embodiments described above are merely descriptions of preferred embodiments of the present invention and are not intended to limit the scope of the present invention. Without departing from the spirit of the present invention, various modifications and improvements made to the technical solutions of the present invention by persons skilled in the art shall fall within the scope of protection defined by the claims of the present invention.

Claims

1. A water jet cutting gun head operation detection mechanism, provided on the gun head body (1) and the gun head cap assembly, characterized in that: It comprises a negative pressure combination channel, a connecting pipe (8) and a negative pressure detector (7), wherein the negative pressure combination channel is arranged in the gun head cap assembly and is capable of detecting the negative pressure caused by high-pressure water discharge; one end of the connecting pipe (8) is connected to the outlet of the negative pressure combination channel and the other end is connected to the negative pressure detector (7), and the negative pressure detector (7) feeds back alarm information to the equipment electronic control system; The gun head cap assembly comprises a gun head cap (3), a water nozzle (4), a wear-resistant part (5) and a pressing part (6) all of which are coaxially assembled and have a central hole. The upper threaded connection hole (301) of the gun head cap (3) is connected to the bottom threaded pipe section (101) of the gun head body (1) to introduce high-pressure water; the water nozzle (4), the wear-resistant part (5) and the pressing part (6) are nested in the central hole at the bottom end of the gun head cap (3), and the pressing part (6) presses the wear-resistant part (5) into the top circular groove of the water nozzle (4); the upper outer wall ring step of the water nozzle (4) is pressed against the top surface of the central hole at the bottom end of the gun head cap (3), and the top of the water nozzle (4) is set as a cone surface and is sealed with the cone surface at the bottom end of the bottom threaded pipe section (101); the central hole of the water nozzle (4) serves as a water outlet (401); The negative pressure combined channel comprises a transverse connecting hole (402), a transverse hole (305) and a longitudinal hole (306); the transverse connecting hole (402) is perpendicular to the water outlet (401) and is opened on the water nozzle (4) and is communicated with the water outlet (401); the transverse hole (305) is opened on the side wall of the gun head cap (3) and is connected to the transverse connecting hole (402) at one end and the longitudinal hole (306) at the other end; the longitudinal hole (306) is axially opened on the side wall of the water nozzle (4); and the outlet of the longitudinal hole (306) is connected to the connecting pipe (8).

2. The operation detection mechanism for a waterjet cutting gun head according to claim 1, characterized in that: The diameter of the center hole of the wear-resistant part (5) is smaller than that of the water outlet (401).

3. The operation detection mechanism for a waterjet cutting gun head according to claim 1, characterized in that: The negative pressure combined channel further comprises an outer annular groove (403), the outer annular groove (403) being formed on the outer side wall of the water nozzle (4), and the outer annular groove (403) being arranged at the end outlet position of the transverse connecting hole (402).

4. The operation detection mechanism for a waterjet cutting gun head according to claim 1, characterized in that: The outlet end of the longitudinal hole (306) is configured as a threaded hole and is connected to the connecting pipe (8) via a threaded pipe joint. The connecting pipe (8) is specifically a hose made of a flexible material.

5. The operation detection mechanism for a waterjet cutting gun head according to claim 1, characterized in that: The negative pressure detector (7) is mounted on the sand adding block on the upper part of the gun head body (1).

6. The operation detection mechanism for a waterjet cutting gun head according to claim 1 or 2, characterized in that: It also includes a water leakage detection structure, which is arranged on the gun head cap assembly and can detect the sealing performance of the gun head body (1) and the gun head cap assembly.

7. The operation detection mechanism for a waterjet cutting gun head according to claim 6, characterized in that: The water leakage detection structure comprises an inner annular groove (304) and an observation hole (302), wherein the inner annular groove (304) is provided above the middle hole at the bottom end of the gun head cap (3) and is located below the sealing cone surface of the water nozzle (4), and the observation hole (302) is provided transversely on the side wall of the gun head cap (3) and the inner end of the observation hole is connected to the inner annular groove (304).

8. The operation detection mechanism for a waterjet cutting gun head according to claim 7, characterized in that: The gun head cap (3) is provided with a flat platform (303) at the outer end of the observation hole (302) and at a position opposite thereto.

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