High-precision metering injector for PIR material production system

Abstract

The utility model discloses a high-precision metering injector for a PIR material production system, which comprises a fixed seat, a micro mixing chamber is arranged in the center of the inner side of the fixed seat, a mixing cavity and an injection cavity are respectively arranged on the left side and the upper side of the fixed seat, an injection cylinder is fixed on the upper side of the fixed seat, and an injection piston is mounted on the inner side of the injection cylinder. An injection pushing rod extending into the injection cavity is fixed to the lower side of the injection piston, and a mixing air cylinder is fixed to the left end of the fixing base. A plurality of raw materials are injected into the micro-mixing chamber through a plurality of feeding pipes under high pressure to be subjected to disordered high-speed collision and rotational flow mixing so as to complete preliminary mixing, the preliminarily mixed raw materials enter the mixing cavity at the moment, and then the raw materials are pushed out through the mixing pushing rod driven by the mixing piston and injected into the injection cavity under high pressure; and finally, an injection piston drives an injection pushing rod to extrude the raw materials at high pressure, and the raw materials are further mixed in the whole flowing process, so that the raw materials are mixed more sufficiently.

Description

Technical Field

[0001] The utility model relates to the technical field of PIR material production, in particular to a high-precision metering injector for a PIR material production system. Background Technique

[0002] PIR material is a foaming material made by the reaction of isocyanate with polyether under the action of a catalyst. Its physical and fireproof properties are more excellent than those of general polyurethane. It is an ideal organic low-temperature heat insulation material, with a small thermal conductivity, light weight, shock resistance, and strong adaptability. It is widely used in oil refineries, chemical plants, ethylene plants, fertilizer plants, cold storages, and building insulation.

[0003] When producing PIR foam products, the mixed raw materials are injected into the mold through a syringe for forming. When mixing the raw materials of PIR foam products, multiple raw materials are injected into the mixing chamber of the syringe under high pressure through multiple feeding pipes. The multiple raw materials collide and swirl mix disorderly and at high speed in the mixing chamber, forming a secondary high-pressure mixed flow. However, this mixing method cannot ensure the full mixing of various raw materials. Content of the Utility Model

[0004] In order to solve the problem that the existing injector cannot ensure the full mixing of various raw materials, the present application provides a high-precision metering injector for a PIR material production system, adopting the following technical solutions:

[0005] A high-precision metering injector for a PIR material production system includes a fixed seat. A micro-mixing chamber is opened at the center inside the fixed seat, and a mixing chamber and an injection chamber are respectively opened on the left side and the upper side of the fixed seat. An injection cylinder is fixed on the upper side of the fixed seat, and an injection piston is installed inside the injection cylinder. An injection pushing rod extending into the injection chamber is fixed to the lower side of the injection piston. A mixing cylinder is fixed to the left end of the fixed seat, and a mixing piston is installed inside the mixing cylinder. A mixing pushing rod extending into the mixing chamber is fixed to the right side of the mixing piston. A plurality of pipe joints are installed on the outer side of the fixed seat, and one end of each pipe joint is connected to a feed pipe. A filling pipe communicating with the micro-mixing chamber is fixed to the lower end of the fixed seat.

[0006] Optionally, a plurality of feeding holes are opened on the outer side of the fixed seat, and installation threaded holes are opened inside the outer port of each feeding hole.

[0007] Optionally, one end of the pipe joint facing the fixed seat is fixed with a threaded head, and the other end of the pipe joint is provided with a socket. A sealing ring is fixed near the port inside the socket, and a locking ring is fixed far from the port inside the socket.

[0008] Optionally, a plurality of locking teeth arranged in a circumferentially uniform manner are fixed inside the locking ring, and the locking teeth are inclined towards the side away from the sealing ring.

[0009] Optionally, a plurality of collars are fixed on the inner surface of the sealing ring, and the inner diameters of the plurality of collars are smaller than the outer diameter of the feed pipe.

[0010] Compared with the prior art, the beneficial effects of the present utility model are as follows:

[0011] In the present utility model, a variety of raw materials are injected into the micro-mixing chamber under high pressure through a plurality of feed pipes for disordered high-speed collision and swirling mixing to complete preliminary mixing. At this time, the preliminarily mixed raw materials enter the mixing chamber, and then the mixing piston drives the mixing pusher rod to push out the raw materials and inject them into the injection chamber under high pressure. Finally, the injection piston drives the injection pusher rod to extrude the raw materials under high pressure. During the entire flowing process, the raw materials are further mixed, so that the mixing of the raw materials is more sufficient. Description of the Drawings

[0012] In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the following will briefly introduce the drawings required for the embodiments. It should be understood that the following drawings only show some embodiments of the present utility model, and therefore should not be regarded as limiting the scope. For those of ordinary skill in the art, without creative efforts, other related drawings can also be obtained based on these drawings.

[0013] Figure 1 is a cross-sectional view of a high-precision metering injector for a PIR material production system of the present utility model;

[0014] Figure 2 is a schematic diagram of a fixed seat of a high-precision metering injector for a PIR material production system shown in the present utility model;

[0015] Figure 3 is a schematic diagram of a pipe joint of a high-precision metering injector for a PIR material production system shown in the present utility model;

[0016] Figure 4 is a schematic diagram of a locking ring of a high-precision metering injector for a PIR material production system shown in the present utility model;

[0017] Figure 5 is a schematic diagram of a sealing ring of a high-precision metering injector for a PIR material production system shown in the present utility model.

[0018] In the figure: 1, mixing cylinder; 2, fixed seat; 21, mixing chamber; 22, micro-mixing chamber; 23, injection chamber; 24, feeding hole; 25, installation threaded hole; 3, injection cylinder; 4, injection piston; 5, injection pusher rod; 6, feed pipe; 7, pipe joint; 71, threaded head; 72, socket; 73, locking ring; 731, locking teeth; 74, sealing ring; 741, collar; 8, injection pipe; 9, mixing pusher rod; 10, mixing piston. Detailed implementation mode

[0019] To make the purpose, technical solution and advantages of the embodiments of the present utility model clearer, the technical solutions in the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are part of the embodiments of the present utility model, rather than all of the embodiments. Based on the embodiments in the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative work belong to the scope of protection of the present utility model. Therefore, the following detailed description of the embodiments of the present utility model provided in the drawings is not intended to limit the scope of the present utility model to be protected, but only represents the selected embodiments of the present utility model.

[0020] Specifically, please refer to Figure 1 and Figure 2 As shown, a high-precision metering injector for a PIR material production system includes a fixed seat 2. A micro-mixing chamber 22 is opened at the center inside the fixed seat 2, and a mixing chamber 21 and an injection chamber 23 are respectively opened on the left side and the upper side of the fixed seat 2. An injection cylinder 3 is fixed on the upper side of the fixed seat 2, and an injection piston 4 is installed inside the injection cylinder 3. An injection pushing rod 5 extending into the injection chamber 23 is fixed to the lower side of the injection piston 4. A mixing cylinder 1 is fixed to the left end of the fixed seat 2, and a mixing piston 10 is installed inside the mixing cylinder 1. A mixing pushing rod 9 extending into the mixing chamber 21 is fixed to the right side of the mixing piston 10. A plurality of pipe joints 7 are installed on the outside of the fixed seat 2, and one end of each pipe joint 7 is connected to a feed pipe 6. A material injection pipe 8 communicating with the micro-mixing chamber 22 is fixed to the lower end of the fixed seat 2. A variety of raw materials are injected into the micro-mixing chamber 22 through a plurality of feed pipes 6 under high pressure for disordered high-speed collision and swirling mixing to complete preliminary mixing. At this time, the preliminarily mixed raw materials enter the mixing chamber 21, and then the mixing piston 10 drives the mixing pushing rod 9 to push out the raw materials and inject them into the injection chamber 23 under high pressure. Finally, the injection piston 4 drives the injection pushing rod 5 to extrude the raw materials under high pressure. During the whole flowing process, the raw materials are further mixed, so that the mixing of the raw materials is more sufficient.

[0021] Specifically, please refer to Figure 2 As shown, a plurality of feeding holes 24 are opened on the outside of the fixed seat 2 for cooperating with the feed pipes 6 to inject raw materials into the micro-mixing chamber 22 for mixing. Mounting threaded holes 25 are opened inside the outer ports of the feeding holes 24 for mounting the pipe joints 7.

[0022] Specifically, please refer to Figure 3As shown in the figure, at one end of the pipe joint 7 facing the fixed seat 2, a threaded head 71 is fixed for installation on the fixed seat 2. At the other end of the pipe joint 7, a socket 72 is provided for inserting the feed pipe 6. A sealing ring 74 is fixed near the port inside the socket 72 for sealing when the feed pipe 6 is inserted, and a locking ring 73 is fixed far from the port inside the socket 72 for locking and fixing the feed pipe 6.

[0023] For details, please refer to Figure 4 As shown in the figure, a plurality of locking teeth 731 are fixed on the inner side of the locking ring 73 and are arranged evenly in a circular shape. The locking teeth 731 are inclined towards the side away from the sealing ring 74. The inclined locking teeth 731 clamp and lock the feed pipe 6 when it is inserted into the socket 72 and then moved back.

[0024] For details, please refer to Figure 5 As shown in the figure, a plurality of sleeve rings 741 are fixed on the inner surface of the sealing ring 74. The inner diameters of the plurality of sleeve rings 741 are smaller than the outer diameter of the feed pipe 6. The plurality of sleeve rings 741 tightly fit on the outer side of the feed pipe 6 for sealing.

[0025] Working principle: The ratio of the isocyanate component, the polyether polyol component, and the critical carbon dioxide is controlled by a high-precision metering pump, and the three raw materials are injected into the micro-mixing chamber 22 under high pressure through three feed pipes 6 for disordered high-speed collision and swirling mixing to complete the preliminary mixing. At this time, the pneumatic control system controls the mixing piston 10 to drive the mixing pusher rod 9 to move leftward, so that the preliminarily mixed raw materials enter the mixing chamber 21. Then, the mixing piston 10 is driven again to drive the mixing pusher rod 9 to move rightward to push out the raw materials and inject them into the injection chamber 23 under high pressure. Finally, the pneumatic control system controls the injection piston 4 to drive the injection pusher rod 5 to extrude the raw materials through the injection pipe 8 under high pressure and inject them into the mold for molding.

[0026] The above is only the preferred embodiment of the present invention and is not used to limit the present invention. For those skilled in the art, the present invention can have various changes and modifications. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A high-precision metering injector for a PIR material production system, comprising a fixing seat (2), characterized in that: A micro-mixing chamber (22) is provided at the center of the inner side of the fixed seat (2), and a mixing chamber (21) and an injection chamber (23) are provided on the left side and the upper side of the fixed seat (2), respectively; an injection cylinder (3) is fixed on the upper side of the fixed seat (2), and an injection piston (4) is installed on the inner side of the injection cylinder (3); an injection push rod (5) extending into the injection chamber (23) is fixed on the lower side of the injection piston (4); a mixing cylinder (1) is fixed on the left end of the fixed seat (2), and a mixing piston (10) is installed on the inner side of the mixing cylinder (1); a mixing push rod (9) extending into the mixing chamber (21) is fixed on the right side of the mixing piston (10); a plurality of pipe joints (7) are installed on the outer side of the fixed seat (2), and a feed pipe (6) is connected to one end of the pipe joint (7); and an injection pipe (8) communicating with the micro-mixing chamber (22) is fixed on the lower end of the fixed seat (2).

2. A high-precision metering injector for a PIR material production system according to claim 1, characterized in that: A plurality of feeding holes (24) are provided on the outer side of the fixing seat (2), and a mounting threaded hole (25) is provided in the outer end of each feeding hole (24).

3. A high-precision metering injector for a PIR material production system according to claim 1, characterized in that: A threaded head (71) is fixed to one end of the pipe joint (7) facing the fixing seat (2), and a socket (72) is provided at the other end of the pipe joint (7). A sealing ring (74) is fixed in the socket (72) near the port, and a locking ring (73) is fixed in the socket (72) away from the port.

4. A high-precision metering injector for a PIR material production system according to claim 3, characterized in that: A plurality of locking teeth (731) evenly arranged in a circumferential shape are fixed to the inner side of the locking ring (73), and the locking teeth (731) are arranged obliquely toward a side away from the sealing ring (74).

5. A high-precision metering injector for a PIR material production system according to claim 3, characterized in that: A plurality of collars (741) are fixed to the inner surface of the sealing ring (74), and the inner diameters of the plurality of collars (741) are smaller than the outer diameter of the injection tube (8).

Images