High strength compression resistant high pressure fluid seal packing

Abstract

The utility model relates to a kind of high-strength compression-resistant high-pressure fluid sealing packing equipment, including storage tank, the top cover of fixed installation on the upper end of storage tank, the discharge pipe of installation at the bottom of storage tank, the filler head of installation at the lower end of discharge pipe, the drive motor of fixed installation on the upper end of top cover, the inside of storage tank is provided with stirring assembly, stirring assembly is used to stir and disperse fluid, the top of top cover is provided with nitrogen pressurizing pipe, the inside of discharge pipe is provided with high-pressure push assembly, high-pressure push assembly is used to push fluid packing outward;The utility model is linked with nitrogen pressurizing auxiliary system by setting the linkage structure of stirring assembly and high-pressure push assembly driven by drive motor, realizes the stable transport of high-viscosity sealing packing under high-pressure environment, and the rotation of helical blade pushes fluid, and by hopper structure, so that pressure gradually increases, jet out in conical contraction mouth, ensure the thrust of packing time, and ensure sealing property.

Description

Technical Field

[0001] This utility model relates to the field of sealing packing equipment technology, specifically a high-strength, pressure-resistant, high-pressure fluid sealing packing equipment. Background Technology

[0002] In the fields of petrochemicals, power, nuclear power and high-end manufacturing, the dynamic sealing parts of equipment (such as valve stems, pump shafts, etc.) often need to be periodically injected with high-performance sealing packing (such as modified graphite paste, high-temperature resistant grease, nano-composite sealant, etc.) to achieve dynamic compensation sealing and prevent media leakage. Therefore, it is necessary to use packing equipment to perform packing operations on high-pressure fluids. However, existing high-strength, high-pressure fluid sealing packing equipment suffers from insufficient packing pressure, making it difficult for fluid to effectively enter the high-pressure sealing cavity and causing residual material accumulation, which can easily lead to secondary pollution or blockage. Based on this, we propose a high-strength, high-pressure fluid sealing packing equipment to solve the above problems. Utility Model Content

[0003] To address the shortcomings of existing technologies, this utility model provides a high-strength, pressure-resistant, high-pressure fluid sealing packing equipment with a high-pressure feeding structure. This solves the problem of insufficient packing pressure in existing high-strength, pressure-resistant, high-pressure fluid sealing packing equipment, which makes it difficult for fluid to effectively enter the high-pressure sealing cavity and forms residual material accumulation, easily leading to secondary pollution or blockage.

[0004] To achieve the above objectives, this utility model provides the following technical solution: a high-strength, pressure-resistant, high-pressure fluid sealing packing device, comprising a storage tank, a top cover fixedly installed on the upper end of the storage tank, a discharge pipe installed at the bottom of the storage tank, a packing head installed at the lower end of the discharge pipe, and a drive motor fixedly installed on the upper end of the top cover. The storage tank is equipped with a stirring assembly for stirring and dispersing the fluid. A nitrogen pressurization pipe is installed on the top of the top cover (the interface should be equipped with a pressure regulating valve and a safety relief valve, and connected to an external pressurization device). A high-pressure pushing assembly is installed inside the discharge pipe for pushing the fluid packing outwards. A conical contraction port is opened in the packing head, and the conical contraction port is connected to the bottom of the discharge pipe. When the fluid passes through at high speed, it creates a self-flushing effect on the outlet of the conical contraction port. A heating unit is installed inside the packing head to heat the fluid and prevent low-temperature solidification.

[0005] Furthermore, the stirring assembly includes a vertically arranged stirring shaft and multiple layers of stirring blades fixedly installed on the outside of the stirring shaft. The upper end of the stirring shaft passes through the top cover and is connected to the output shaft of the drive motor. The stirring blades are symmetrically distributed.

[0006] Furthermore, a double-end mechanical seal is provided between the stirring shaft and the top cover. The mechanical seal includes a stationary ring, a rotating ring, and a spring compensation structure. The mechanical seal is used to prevent high-pressure fluid from leaking along the stirring shaft.

[0007] Furthermore, the bottom of the discharge pipe and the storage box are connected. The discharge pipe is a double-layer stainless steel pipe, and the inside of the discharge pipe is filled with a buffer layer (polyimide foam material). The discharge pipe has a funnel-shaped structure that is larger at the top and smaller at the bottom.

[0008] It should be noted that the inner transition section of the discharge pipe is a smooth, gradually tapering curved surface to avoid steps or right-angle turns, in order to reduce the flow resistance and dead zones of high-viscosity fluids.

[0009] Furthermore, the high-pressure pushing assembly includes a transmission rod vertically arranged in the discharge pipe, a spiral blade fixedly installed on the surface of the transmission rod, the spiral blade and the discharge pipe being adapted in shape (the outer diameter of the spiral blade is slightly smaller than the inner diameter of the discharge pipe), and the upper end of the transmission rod being connected to the lower end of the stirring shaft.

[0010] Furthermore, a mounting bracket is fixedly installed at the bottom inside the storage tank, the lower end of the stirring shaft is rotatably connected to the mounting bracket, and the spiral blades are made of alloy steel with surface nitriding treatment.

[0011] It should be noted that the stirring shaft and the drive rod are connected by a splined shaft to ensure the transmission stability when the stirring and pushing functions share a single power source, while also allowing for compensation for minor assembly deviations to prevent stress concentration from damaging the mechanical seals.

[0012] Furthermore, the heating unit includes a PTC heating element embedded inside the packing head and a temperature sensor mounted on the packing head. The temperature sensor is used to sense the heating temperature, and both the PTC heating element and the temperature sensor are connected to a temperature control module.

[0013] Furthermore, the outlet end of the conical contraction port is equipped with an elastic closing sealing structure. The elastic closing sealing structure is composed of a lip valve made of perfluoroether rubber, which closes naturally in the absence of pressure and automatically opens under internal pressure during material injection.

[0014] Furthermore, it also includes an intelligent control system, which is electrically connected to the drive motor, heating unit, and sensors. It can set the feeding amount, adjust the pushing speed, monitor the discharge pressure, execute anti-blocking programs, and issue alarm prompts when there is overload, pipe blockage, or material shortage.

[0015] Compared with the prior art, the technical solution of this application has the following beneficial effects: 1. This high-strength, pressure-resistant, high-pressure fluid sealing packing equipment, through the linkage structure of the stirring component driven by the drive motor and the high-pressure pushing component, combined with the nitrogen pressurization auxiliary system, realizes the stable delivery of high-viscosity sealing packing under high pressure environment. The rotation of the spiral blade pushes the fluid, and through the funnel structure, the pressure gradually increases, and it is ejected in the conical contraction orifice, which ensures the thrust during packing and ensures the sealing performance. 2. This high-strength, pressure-resistant fluid sealing packing equipment uses rotating agitator blades to disperse the stored packing, preventing the fluid from settling and stratifying in a high-pressure environment. 3. This high-strength, pressure-resistant, high-pressure fluid sealing packing equipment achieves self-cleaning function by using high-speed fluid jet after each injection. At the same time, in the shutdown state, the outlet is automatically sealed by the lip valve to prevent air from entering and causing the medium to oxidize and form a crust or external contaminants to invade. In conjunction with the PTC heating element and temperature control module, it avoids the solidification and blockage of high-viscosity packing in low-temperature environments, greatly reduces the accumulation of residual materials, and eliminates the risk of secondary pollution and channel blockage. Attached Figure Description

[0016] Figure 1 The diagram shown is a schematic representation of the internal structure of the storage box of this utility model. Figure 2 The diagram shown is a schematic representation of the overall structure of this utility model. Figure 3 The diagram shown is a schematic of the stirring shaft structure of this utility model; Figure 4 The diagram shown is a front view of the structure of this utility model; Figure 5 The diagram shown is a schematic representation of the internal structure of the discharge pipe of this utility model. Figure 6 The diagram shown is a schematic diagram of the mounting bracket structure of this utility model.

[0017] Explanation of reference numerals in the attached drawings: 1. Storage tank; 2. Top cover; 21. Stirring shaft; 22. Stirring blade; 23. Mechanical seal; 3. Discharge pipe; 31. Transmission rod; 32. Spiral blade; 33. Mounting bracket; 4. Packing head; 41. PTC heating element; 5. Drive motor; 6. Conical contraction port; 61. Elastic closed sealing structure. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Please see Figures 1-6 This embodiment of a high-strength, pressure-resistant, high-pressure fluid sealing packing device includes a storage tank 1, a top cover 2 fixedly installed on the upper end of the storage tank 1, a discharge pipe 3 installed at the bottom of the storage tank 1, a packing head 4 installed at the lower end of the discharge pipe 3, and a drive motor 5 fixedly installed on the upper end of the top cover 2. The storage tank 1 is equipped with a stirring assembly, which is used to stir and disperse the fluid to prevent the high-viscosity sealing packing from settling or agglomerating. The top of the top cover 2 is equipped with a nitrogen pressurization pipe, which can be used to introduce inert gas into the storage tank 1 to assist in pressurization. The discharge pipe 3 is equipped with a high-pressure pushing assembly, which is used to push the fluid packing outward. The packing head 4 has a conical contraction port 6, which is connected to the bottom of the discharge pipe 3. When the fluid passes through at high speed, it forms a self-flushing effect on the outlet of the conical contraction port 6. The packing head 4 is equipped with a heating unit, which is used to heat the fluid to prevent the sealing packing from solidifying and clogging in low-temperature environments.

[0020] In this embodiment, the bottom of the discharge pipe 3 is connected to the bottom of the storage box 1. The discharge pipe 3 is a double-layer stainless steel pipe, and the inside of the discharge pipe 3 is filled with a buffer layer. The discharge pipe 3 has a funnel-shaped structure that is larger at the top and smaller at the bottom.

[0021] It should be noted that the outer wall of the storage box 1 is equipped with reinforcing ribs and a double-layer structure with the discharge pipe 3, forming a high-strength compressive structure. The bottom of the storage box 1 is a conical contraction structure, which facilitates the flow of the filler and is adapted to the funnel structure of the discharge pipe 3, so that the material can smoothly converge to the outlet under the combined action of gravity and thrust, avoiding dead corners and material accumulation.

[0022] Please see Figure 1 , Figure 3 In this embodiment, the stirring assembly includes a vertically arranged stirring shaft 21 and multi-layer stirring blades 22 fixedly installed on the outside of the stirring shaft 21. The upper end of the stirring shaft 21 passes through the top cover 2 and is connected to the output shaft of the drive motor 5. The stirring blades 22 are symmetrically distributed. A double-end mechanical seal 23 is provided between the stirring shaft 21 and the top cover 2. The mechanical seal 23 includes a stationary ring, a moving ring and a spring compensation structure. The mechanical seal 23 is used to prevent high-pressure fluid from leaking along the stirring shaft 21.

[0023] It should be noted that the rotation of the stirring blade 22 can disperse the fluid and prevent the packing from settling. The double-end mechanical seal 23 is arranged back to back, and the two sets of friction pairs are filled with a separating fluid (such as white oil or deionized water) to form a double sealing barrier, which is suitable for high pressure, high temperature and corrosive media environments.

[0024] Please see Figure 1 , Figure 5 and Figure 6In this embodiment, the high-pressure pushing assembly includes a transmission rod 31 vertically arranged in the discharge pipe 3 and a spiral blade 32 fixedly installed on the surface of the transmission rod 31. The spiral blade 32 and the discharge pipe 3 are adapted to each other. The upper end of the transmission rod 31 is connected to the lower end of the stirring shaft 21. An installation bracket 33 is fixedly installed at the bottom of the inner side of the storage box 1. The lower end of the stirring shaft 21 is rotatably connected to the installation bracket 33. The spiral blade 32 is made of alloy steel with surface nitriding treatment.

[0025] It should be noted that the spiral blade 32 and the discharge pipe 3 are adapted to form a variable pitch structure. The pitch is larger near the inlet section, which is conducive to material suction, while the pitch is smaller at the outlet section, which enhances the compression ratio and pushing pressure. At the same time, the gap between the outer diameter of the spiral blade 32 and the inner wall of the discharge pipe is controlled within the range of 0.3±0.1mm.

[0026] Please see Figure 1 , Figure 5 In this embodiment, the heating unit includes a PTC heating element 41 embedded inside the filling head 4 and a temperature sensor mounted on the filling head 4. The temperature sensor is used to sense the heating temperature, and both the PTC heating element 41 and the temperature sensor are connected to a temperature control module.

[0027] In this embodiment, the outlet end of the conical shrinkage port 6 is provided with an elastic closing sealing structure 61. The elastic closing sealing structure 61 is composed of a lip valve made of perfluoroether rubber. It closes naturally in the absence of pressure and automatically opens under internal pressure during material injection.

[0028] It should be noted that the PTC heating element 41 is a positive temperature coefficient ceramic heating element with self-limiting temperature characteristics. When the temperature reaches the set value (such as 80℃), it automatically reduces the power output to prevent overheating and damage to the packing or equipment. The lip valve of the elastic closed sealing structure 61 has a preset compression amount. When closed, it can completely seal the outlet, preventing air from entering and causing the packing to oxidize and form a scale. It can also prevent external dust and moisture from contaminating the equipment.

[0029] The working principle of the above embodiments is as follows: During operation, the high-viscosity sealing filler to be injected is first added to the storage tank 1, the top cover 2 is closed, and a low-pressure nitrogen source is connected through a nitrogen pressurization pipe to pre-pressurize the inside of the storage tank 1 to assist material flow. The drive motor 5 is started, and its power is transmitted to the stirring shaft 21 through the output shaft, driving the multi-layer stirring blades 22 to rotate, continuously stirring the filler in the storage tank 1 to prevent sedimentation or agglomeration. At the same time, the lower end of the stirring shaft 21 drives the transmission rod 31 and the spiral blades 32 to rotate synchronously through a spline coupling. Under the propulsion of the spiral blades 32, the filler moves downward along the funnel-shaped discharge pipe 3 and is gradually compressed and pressurized. Since the discharge pipe 3 is wider at the top and wider at the bottom... With its small structure and smooth inner wall transition, the material flows smoothly. The high-pressure packing enters the packing head 4 through the bottom of the discharge pipe 3 and is ejected at high speed through the conical contraction port 6. During this process, the PTC heating element 41 preheats the area of ​​the packing head 4 to maintain the packing in a suitable flow state. The high-speed fluid itself forms a scouring effect to remove any residues that may be attached near the outlet. The elastic closed sealing structure 61 automatically opens under pressure to complete the injection action. After the injection is completed, the system stops running, the internal pressure drops, and the lip valve automatically closes due to the elasticity of the material to cut off the channel. The temperature control module continues to heat for a period of time to prevent the packing from solidifying at the outlet due to cooling during shutdown.

[0030] It should be noted that the control method of this utility model is controlled by a controller. The control circuit of the controller can be implemented by those skilled in the art through simple programming. The power supply is also common knowledge in the field. Furthermore, this utility model is mainly used to protect mechanical devices, so the control method and circuit connection will not be explained in detail here.

[0031] 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 a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one..." does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes said element.

[0032] Although embodiments of the present invention have been shown and described, it will be understood by those skilled in the art that various changes, modifications, substitutions and alterations can be made to these embodiments without departing from the principles and spirit of the present invention, the scope of which is defined by the appended claims and their equivalents.

Claims

1. A high-strength, pressure-resistant, high-pressure fluid sealing packing device, characterized in that: It includes a storage tank (1), a top cover (2) fixedly installed on the upper end of the storage tank (1), a discharge pipe (3) installed at the bottom of the storage tank (1), a filler head (4) installed at the lower end of the discharge pipe (3), and a drive motor (5) fixedly installed on the upper end of the top cover (2). The storage tank (1) is equipped with a stirring assembly, which is used to stir and disperse the fluid. The top of the top cover (2) is equipped with a nitrogen pressurization pipe. The discharge pipe (3) is equipped with a high-pressure pushing assembly, which is used to push the fluid filler outward. The filler head (4) has a conical constriction port (6), which is connected to the bottom of the discharge pipe (3). When the fluid passes through at high speed, it forms a self-flushing effect on the outlet of the conical constriction port (6). The filler head (4) is equipped with a heating unit, which is used to heat the fluid to prevent low-temperature solidification.

2. The high-strength, high-pressure-resistant fluid sealing packing equipment according to claim 1, characterized in that: The stirring assembly includes a vertically arranged stirring shaft (21) and multi-layer stirring blades (22) fixedly installed on the outside of the stirring shaft (21). The upper end of the stirring shaft (21) passes through the top cover (2) and is connected to the output shaft of the drive motor (5). The stirring blades (22) are symmetrically distributed.

3. The high-strength, high-pressure-resistant fluid sealing packing equipment according to claim 2, characterized in that: A double-end mechanical seal (23) is provided between the stirring shaft (21) and the top cover (2). The mechanical seal (23) includes a stationary ring, a moving ring and a spring compensation structure. The mechanical seal (23) is used to prevent high-pressure fluid from leaking along the stirring shaft (21).

4. The high-strength, high-pressure-resistant fluid sealing packing equipment according to claim 1, characterized in that: The bottom of the discharge pipe (3) is connected to the storage box (1). The discharge pipe (3) is a double-layer stainless steel pipe, and the inside of the discharge pipe (3) is filled with a buffer layer. The discharge pipe (3) has a funnel-shaped structure that is larger at the top and smaller at the bottom.

5. The high-strength, high-pressure-resistant fluid sealing packing equipment according to claim 3, characterized in that: The high-pressure push assembly includes a transmission rod (31) vertically arranged in the discharge pipe (3) and a spiral blade (32) fixedly installed on the surface of the transmission rod (31). The spiral blade (32) and the discharge pipe (3) are adapted to each other. The upper end of the transmission rod (31) is connected to the lower end of the stirring shaft (21).

6. The high-strength, high-pressure-resistant fluid sealing packing equipment according to claim 5, characterized in that: The bottom of the inner side of the storage box (1) is fixedly installed with a mounting bracket (33), the lower end of the stirring shaft (21) is rotatably connected to the mounting bracket (33), and the spiral blade (32) is made of alloy steel with surface nitriding treatment.

7. The high-strength, high-pressure-resistant fluid sealing packing equipment according to claim 1, characterized in that: The heating unit includes a PTC heating element (41) embedded inside the packing head (4) and a temperature sensor mounted on the packing head (4). The temperature sensor is used to sense the heating temperature, and both the PTC heating element (41) and the temperature sensor are connected to a temperature control module.

8. The high-strength, high-pressure-resistant fluid sealing packing equipment according to claim 1, characterized in that: The outlet end of the conical shrinkage port (6) is provided with an elastic closing sealing structure (61). The elastic closing sealing structure (61) is composed of a lip valve made of perfluoroether rubber. It closes naturally in the absence of pressure and automatically opens under internal pressure during material injection.

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