Paraffin injection control system of paraffin forming machine and paraffin forming machine
By introducing a combination of a travel switch and an electromagnetic reversing valve into the paraffin wax molding machine, the problem of the contact transition state between the cam and the mechanical pneumatic reversing valve is solved, precise control of the wax injection valve is achieved, and the production efficiency of the molding machine and the quality of the finished product are improved.
Patent Information
- Application Number
- CN202422742367.2
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-11
- Publication Date
- 2025-10-14
- Estimated Expiration
- 2034-11-11
AI Technical Summary
In existing paraffin wax molding machines, there is a transitional state in the contact between the cam and the mechanical pneumatic reversing valve, which leads to unclear wax injection timing and duration, affecting the quality of the finished wax blocks.
By combining a travel switch with an electromagnetic reversing valve, only two clear state changes occur during the rotation of the cam. The electromagnetic reversing valve is controlled by the travel switch to achieve precise opening and closing of the wax injection valve.
The stability and control accuracy of the wax injection process are improved, the stability and consistency of the quality of the finished wax blocks are ensured, and the production efficiency of the paraffin wax molding machine is improved.
Smart Images
Figure CN223431884U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of paraffin wax molding machines, in particular to a paraffin wax molding machine wax injection control system and a paraffin wax molding machine. Background Art
[0002] Paraffin wax molding is the final step in the paraffin wax production process at refineries. A paraffin wax molding machine is a specialized piece of machinery that continuously cools liquid paraffin into solid blocks of defined dimensions and weight.
[0003] Currently, during the operation of the paraffin molding machine, the control of the wax injection cylinder relies on the coordinated action of a mechanical pneumatic reversing valve and a cam. The mechanical pneumatic reversing valve is installed on the equipment column. The cam serves as a driving element and includes a protruding portion, a base circle portion, and a transition portion. When the protruding portion of the cam rotates with the main shaft until it comes into contact with the mechanical pneumatic reversing valve, it presses the valve switch of the mechanical pneumatic reversing valve, thereby triggering the control circuit of the cylinder, causing the cylinder to open. Due to the linkage between the cylinder and the wax injection valve, the opening action of the cylinder will prompt the wax injection valve to close to stop wax injection. When the cam continues to rotate and its protruding portion gradually leaves the mechanical pneumatic reversing valve, the valve switch resets to its initial state, releasing the trigger on the cylinder control circuit, causing the cylinder to close and prompting the wax injection valve to open to begin wax injection.
[0004] However, during the rotation of the above-mentioned cam, the base circle part, transition part and protruding part of the cam gradually come into contact with the mechanical pneumatic reversing valve to gradually press down or gradually leave the mechanical pneumatic reversing valve. This process is continuous, rather than an instantaneous switching action. This transition state causes the mechanical pneumatic reversing valve to be in an unswitched state, the so-called "seemingly open but not open" state, causing the wax injection valve to be in an incompletely opened or incompletely closed state. That is, this seemingly open but not open state will affect the accurate control of the cylinder and the wax injection valve, thereby affecting the timing and duration of wax injection. Utility Model Content
[0005] The purpose of the present utility model is to provide a wax injection control system for a paraffin wax molding machine, which is used to solve the problem in the prior art that during the rotation of the cam, there is a transition state in the contact with the mechanical pneumatic reversing valve, resulting in unclear control signals, thereby affecting the timing and duration of wax injection and reducing the quality of the finished wax block. The purpose of the present utility model is also to provide a paraffin wax molding machine, which is used to solve the problem in the prior art that during the rotation of the cam, there is a transition state in the contact with the mechanical pneumatic reversing valve, resulting in unclear control signals, thereby affecting the timing and duration of wax injection and reducing the quality of the finished wax block.
[0006] To achieve the above-mentioned purpose, the technical solution of the wax injection control system of the paraffin molding machine provided by the utility model is: the wax injection control system of the paraffin molding machine includes a wax injection valve and a cam, the wax injection valve is connected to a cylinder, the cylinder is used to control the disconnection and conduction of the wax injection valve, a travel switch is arranged on the side of the cam, the travel switch is connected to an electromagnetic reversing valve, the electromagnetic reversing valve is connected to the cylinder to control the extension and contraction of the cylinder, the cam has a base circle part, a protruding part and a transition part located between the base circle part and the protruding part around the circumference, and the cam can periodically trigger the travel switch during rotation, the protruding part of the cam corresponds to one of the open and closed states of the travel switch contact, and the base circle part and the transition part of the cam correspond to the other of the open and closed states of the travel switch contact.
[0007] As a further improvement, the travel switch is used to be installed at a corresponding position on the column flush with the main shaft, and the protruding part of the cam extends to no less than half of the cam's peripheral path on the cam's periphery.
[0008] As a further improvement, the travel switch is a normally open travel switch, and the protruding part of the cam corresponds to the closed state of the travel switch contact, so that the electromagnetic reversing valve is energized and the wax injection valve is disconnected by extending the control cylinder.
[0009] As a further improvement, the travel switch is a normally closed travel switch. The base circle part and the transition part of the cam correspond to the closed state of the travel switch, so that the solenoid valve is energized and the wax injection valve is disconnected by extending the control cylinder.
[0010] The beneficial effect is as follows: the utility model provides a wax injection control system for a paraffin molding machine that is improved on the basis of the existing technology, with a travel switch and an electromagnetic reversing valve as the core, and only includes two clear states during the rotation of the cam, one is that the protruding part of the cam acts on the travel switch, triggering a clear change in its contact state, and the other is that the protruding part of the cam does not act on the travel switch, and the travel switch automatically resets to the initial state. These two clearly defined state transitions provide a direct and high-precision control input signal for the electromagnetic reversing valve, so that the electromagnetic reversing valve can respond instantly and accurately, and then achieve fine regulation of the disconnection and conduction states of the wax injection valve by controlling the extension and contraction of the cylinder. Not only does it fundamentally eliminate the transition state or uncertainty of the signal in the existing technology, but it also greatly improves the response speed and control accuracy of the entire control system. The wax injection process can be carried out efficiently and stably, which significantly improves the production efficiency of the paraffin molding machine and ensures the stability and consistency of the quality of the finished wax blocks.
[0011] To achieve the above object, the utility model provides a technical scheme of paraffin forming machine is: paraffin forming machine includes wax injection cylinder and main shaft, the main shaft is connected with paraffin forming machine wax injection control system, to control the effusion of liquid paraffin raw material in wax injection cylinder, paraffin forming machine wax injection control system includes wax injection valve and cam, wax injection valve is connected with cylinder, and the cylinder is used to control the break and conduction of wax injection valve, the side of cam is provided with travel switch, travel switch is connected with electromagnetic reversing valve, electromagnetic reversing valve connects the cylinder, to be used for controlling the expansion and contraction of cylinder, cam has base circle portion, convex portion and transition portion between base circle portion and convex portion around the circumference, cam can periodically touch travel switch in the process of rotating, the break and closure state of one of the convex portion of cam corresponding travel switch contact, the break and closure state of another of the base circle portion and transition portion of cam corresponding travel switch contact.
[0012] As further improvement, the travel switch is installed on the upright column at a position corresponding to the level of the main shaft, and the convex portion of the cam extends to not less than half the outer circumferential path of the cam.
[0013] As further improvement, the travel switch is a normally open travel switch, and the convex portion of the cam corresponds to the closure state of the travel switch contact, so that the electromagnetic reversing valve is powered on, and the wax injection valve is broken by controlling the extension of the cylinder.
[0014] As further improvement, the travel switch is a normally closed travel switch, and the base circle portion and the transition portion of the cam correspond to the closure state of the travel switch, so that the electromagnetic valve is powered on, and the wax injection valve is broken by controlling the extension of the cylinder.
[0015] The utility model improves the paraffin forming machine wax injection control system in the prior art, and after improvement, the travel switch and the electromagnetic reversing valve are used as the core. In the process of rotating the cam, only two clear states are included, one is that the convex portion of the cam acts on the travel switch to trigger the clear change of the contact state, and the other is that the convex portion of the cam does not act on the travel switch, and the travel switch is automatically reset to the initial state. The two clearly defined state transitions provide a direct, unambiguous and high-precision control input signal for the electromagnetic reversing valve, so that the electromagnetic reversing valve can respond immediately and accurately, and then the extension and contraction of the cylinder are controlled to realize fine regulation and control of the break and conduction state of the wax injection valve. Not only the transition state or uncertainty of the signal in the prior art is fundamentally eliminated, but also the response speed and control accuracy of the entire control system are greatly improved. The wax injection process can be carried out efficiently and stably, the production efficiency of the paraffin forming machine is significantly improved, and the stability and consistency of the quality of the finished wax block are ensured. BRIEF DESCRIPTION OF DRAWINGS
[0016] Figure 1This is a structural diagram of an embodiment of a wax injection control system for a paraffin molding machine provided by the utility model;
[0017] In the figure: 1. Main shaft; 21. Base circle part; 22. Protruding part; 23. Transition part; 3. Travel switch; 4. Solenoid reversing valve; 5. Cylinder; 6. Air inlet; 7. Wax loading tray; 8. Chain; 9. Feeding port. DETAILED DESCRIPTION
[0018] The features and performance of the present invention are further described in detail below in conjunction with the embodiments.
[0019] Paraffin wax molding machines cool and mold molten paraffin into a specific shape. In current common paraffin wax molding machines, the cam's rotation often creates an ambiguous state, seemingly "neither open nor closed," due to the interaction between different circumferential components of the cam and the mechanical pneumatic reversing valve. This makes the opening and closing of the wax injection valve unpredictable, severely impacting the stability and control accuracy of the wax injection process. The wax injection valve may fail to open accurately at the appropriate time, resulting in either excessive or insufficient wax injection, which in turn affects the quality and appearance of the finished wax block.
[0020] Based on this, the utility model, on the basis of improving the existing technology, can realize precise control of the opening and closing state of the wax injection valve by introducing a combination of an electromagnetic reversing valve and a travel switch, eliminate the fuzzy state existing in the existing technology, thereby improving the stability and control accuracy of the wax injection process, and providing guarantee for the production quality of paraffin products.
[0021] The overall design concept of the paraffin wax molding machine provided by the utility model is:
[0022] The technical concept of the present invention is to utilize the interaction between different axial parts of the cam and the travel switch to generate two distinct signals and transmit them to the electromagnetic reversing valve to clearly regulate the disconnection and conduction states of the wax injection valve, thereby achieving high efficiency and stability in the wax injection process.
[0023] Specifically, as a basic technical solution, Figure 1 As shown, a paraffin wax molding machine includes a wax injection cylinder storing liquid paraffin raw material so that the paraffin wax can be injected into a mold or wax tray during the molding process to achieve the paraffin molding process. The paraffin wax molding machine also includes a paraffin wax molding machine wax injection control system to control the outflow of the liquid paraffin raw material from the wax injection cylinder. The paraffin wax molding machine main shaft 1 is driven to rotate by a motor. The paraffin wax molding machine wax injection control system includes a cam fixed to the main shaft 1, a limit switch 3 is mounted beside the cam 1, and the cam has a base circular portion 21, a protruding portion 22, and a transition portion 23 located between the base circular portion 21 and the protruding portion 22 around the circumference. The electromagnetic reversing valve 4 is connected between the limit switch 3 and the cylinder 5.
[0024] After the liquid paraffin raw material is continuously transported by the raw material pump and enters the wax injection cylinder through the feed port 9, as the paraffin molding machine main shaft 1 rotates, the cam fixed on it begins to rotate. When the cam rotates to a certain position and contacts the limit switch 3, it triggers the contact of the limit switch 3 to change its state. The state of the limit switch 3 switches between closed and open, and the electromagnetic reversing valve 4 is energized or de-energized accordingly, so that the cylinder 5 performs an extension or retraction action, thereby realizing the precise opening and closing of the wax injection valve. When the wax injection valve is opened, the liquid paraffin raw material flows out of the wax injection cylinder and enters the wax tray on the wax loading tray 7; when the wax injection valve is closed, the liquid paraffin raw material stops flowing. When injecting wax, wax liquid is injected into the six wax trays at the same time, and the wax loading tray 7 is continuously fed into the cold room by the chain 8 and operates slowly in the cold room to ensure that the liquid paraffin is cooled into a wax block of a certain shape after sufficient cooling time. The wax block is demolded and then packaged and shipped.
[0025] By cooperating with the travel switch 3, the electromagnetic reversing valve 4 can periodically contact the travel switch 3 during the cam's rotation, depressing the contact of the travel switch 3. During the cam's rotation, there are only two states: the cam protrusion 22 contacts the travel switch 3, and the cam rotates until the protrusion 22 leaves the travel switch 3. This ensures that the signal received by the electromagnetic reversing valve 4 is also very clear. When the contact state of the travel switch 3 changes, the electromagnetic reversing valve 4 can respond immediately, driving the cylinder 5 to perform a telescopic movement, thereby ensuring that the wax injection valve injects wax at the appropriate time and with the correct opening. This achieves precise and rapid control of the wax injection valve's opening and closing state, avoiding the problem of unclear control signals caused by transition states in mechanical pneumatic reversing valves in the prior art. This ensures the accuracy of each wax injection amount, facilitates precise control of the wax injection amount, and ensures that the weight and shape of each wax plate meet the preset requirements, thereby improving the quality and consistency of the finished wax blocks.
[0026] Based on the above overall introduction to the paraffin wax molding machine of the present invention, a more specific embodiment is provided below on the basis of the overall introduction:
[0027] This embodiment focuses on a detailed description of how the opening and closing transitions of the contacts of the travel switch control the opening and closing of the wax injection valve.
[0028] like Figure 1 As shown, the travel switch 3 is a normally open travel switch. The protruding part of the cam corresponds to the closed state of the contact of the travel switch 3. The travel switch 3 is connected to the power supply circuit of the electromagnetic reversing valve 4. In the initial state, that is, when the protruding part of the cam does not contact the travel switch 3, the contact of the travel switch 3 is in the open state.
[0029] When the paraffin molding machine's main shaft 1 rotates, the cam's protrusion 22 rotates until it contacts the travel switch 3, depressing the switch's contacts, closing them and allowing current to flow, thereby triggering the operation of the solenoid reversing valve 4. The solenoid reversing valve 4 controls the flow of compressed air entering through the air inlet 6 during both energization and de-energization. When energized, the magnetic force generated by the electromagnet pushes the valve core, opening the valve and allowing compressed air to flow. Energizing the solenoid reversing valve 4 controls the extension of the cylinder 5, pushing the wax injection valve open, halting the flow of liquid paraffin and the wax injection process.
[0030] When the cam continues to rotate until its protruding portion 22 clears the travel switch 3 and the cam's base circle portion 21 and transition portion 23 rotate to positions corresponding to the contacts of the travel switch 3, the contacts of the travel switch 3 return to the open state, and the electromagnetic reversing valve 4 loses power. In this de-energized state, the valve core returns to its initial position under the action of the spring, and the valve closes, blocking the flow of compressed air. Cylinder 5 then retracts under the control of the electromagnetic reversing valve 4, opening the wax injection valve and allowing the paraffin to flow, thus proceeding with the wax injection process.
[0031] In other embodiments, the travel switch 3 is a normally closed travel switch, and the base circle portion 21 and the transition portion 23 of the cam correspond to the closed state of the travel switch. When the main shaft 1 of the paraffin molding machine rotates, the protruding portion 22 of the cam rotates until it contacts the travel switch, causing the contacts of the travel switch 3 to be disconnected, causing the electromagnetic reversing valve 4 to lose power, and the cylinder 5 to be in a retracted state. The retraction of the cylinder 5 causes the wax injection valve to be in a conducting state, allowing the liquid paraffin raw material to flow.
[0032] When the cam continues to rotate until its protruding portion 22 leaves contact with the travel switch 3, the base circle portion 21 and the transition portion 23 of the cam rotate to a position corresponding to the contact of the travel switch 3, and the contact of the travel switch 3 returns to the closed state, and the electromagnetic reversing valve 4 is energized. In the energized state, the cylinder 5 extends under the control of the electromagnetic reversing valve 4, pushing the wax injection valve into the open state, thereby stopping the wax injection process.
[0033] Based on the above overall introduction to the paraffin wax molding machine of the present invention, a more specific embodiment is provided below on the basis of the overall introduction:
[0034] This embodiment focuses on the detailed description of the cam.
[0035] like Figure 1As shown, the travel switch 3 is mounted on the column at a corresponding position flush with the main shaft 1. The cam's protrusion 22 extends along the cam's periphery to at least half of the cam's periphery. As the cam rotates, the protrusion 22 contacts the travel switch 3. When the protrusion 22 presses against the travel switch, its contact state changes, and this change is maintained as long as the protrusion 22 continues to press. When the cam continues to rotate and the protrusion 22 leaves the travel switch 3, the travel switch 3 returns to its initial state, ready for the next protrusion pressure and wax injection control cycle.
[0036] In this embodiment, Figure 1 As shown, the protrusion 22 is arc-shaped, providing a large contact area and ensuring reliable contact with the travel switch. Furthermore, the extension path of the protrusion 22 on the outer circumference of the cam can be varied according to actual operational needs, thereby controlling the ratio of the opening and closing durations of the wax injection valve. Alternatively, in other embodiments, the protrusion can be elliptical.
[0037] The specific structure of the embodiment of the wax injection control system of the paraffin wax molding machine of the present utility model is the same as that of the wax injection control system of the paraffin wax molding machine in the embodiment of the paraffin wax molding machine introduced above, and will not be repeated herein.
[0038] It should be noted that the various specific technical features described in the above specific embodiments can be combined in any appropriate manner without contradiction. In order to avoid unnecessary repetition, the present invention will not further describe various possible combinations.
[0039] In addition, the various embodiments of the present invention may be arbitrarily combined, and as long as they do not violate the concept of the present invention, they should also be regarded as the contents disclosed by the present invention.
[0040] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. The scope of patent protection of the present invention shall be based on the claims. Any equivalent structural changes made using the description and drawings of the present invention shall also be included in the scope of protection of the present invention.
Claims
1. A wax injection control system for a paraffin molding machine, comprising a wax injection valve and a cam, wherein the wax injection valve is connected to a cylinder for controlling the opening and closing of the wax injection valve, characterized in that: A travel switch is provided on the side of the cam, and the travel switch is connected to an electromagnetic reversing valve, which is connected to the cylinder to control the extension and contraction of the cylinder. The cam has a base circle part, a protruding part and a transition part between the base circle part and the protruding part around the circumference. During the rotation of the cam, the travel switch can be triggered periodically. The protruding part of the cam corresponds to one of the open and closed states of the travel switch contact, and the base circle part and the transition part of the cam correspond to the other of the open and closed states of the travel switch contact.
2. The wax injection control system for a paraffin molding machine according to claim 1, characterized in that: The limit switch is used to be installed at a corresponding position on the column that is flush with the main shaft, and the protruding part of the cam extends to no less than half of the cam outer peripheral path.
3. The wax injection control system for a paraffin wax molding machine according to claim 2, characterized in that: The travel switch is a normally open travel switch. The protruding part of the cam corresponds to the closed state of the travel switch contact, so that the electromagnetic reversing valve is energized and the control cylinder is extended to disconnect the wax injection valve.
4. The wax injection control system for a paraffin wax molding machine according to claim 2, characterized in that: The travel switch is a normally closed travel switch. The base circle part and the transition part of the cam correspond to the closed state of the travel switch, so that the solenoid valve is energized and the wax injection valve is disconnected by extending the control cylinder.
5. A paraffin wax molding machine, comprising a wax injection cylinder and a main shaft, wherein the main shaft is connected to a wax injection control system of the paraffin wax molding machine to control the outflow of liquid paraffin raw material in the wax injection cylinder. The wax injection control system of the paraffin wax molding machine comprises a wax injection valve and a cam, wherein the wax injection valve is connected to a cylinder, and the cylinder is used to control the disconnection and conduction of the wax injection valve, characterized in that: A travel switch is provided on the side of the cam, and the travel switch is connected to an electromagnetic reversing valve, which is connected to the cylinder to control the extension and contraction of the cylinder. The cam has a base circle part, a protruding part and a transition part between the base circle part and the protruding part around the circumference. During the rotation of the cam, the travel switch can be triggered periodically. The protruding part of the cam corresponds to one of the open and closed states of the travel switch contact, and the base circle part and the transition part of the cam correspond to the other of the open and closed states of the travel switch contact.
6. The paraffin wax molding machine according to claim 5, characterized in that: The travel switch is mounted on the column at a corresponding position flush with the main shaft, and the protruding portion of the cam extends to no less than half of the cam's peripheral path on the cam's periphery.
7. The paraffin wax molding machine according to claim 6, characterized in that: The travel switch is a normally open travel switch. The protruding part of the cam corresponds to the closed state of the travel switch contact, so that the electromagnetic reversing valve is energized and the control cylinder is extended to disconnect the wax injection valve.
8. The paraffin wax molding machine according to claim 6, characterized in that: The travel switch is a normally closed travel switch. The base circle part and the transition part of the cam correspond to the closed state of the travel switch, so that the solenoid valve is energized and the wax injection valve is disconnected by extending the control cylinder.