A pneumatic ultra-low temperature ball valve and automatic LNG loading skid

Abstract

The utility model provides a kind of pneumatic ultralow temperature ball valve and automatic LNG loading sled, it is related to cryogenic valve technical field, including valve main body and pneumatic actuator, the valve main body includes valve body, valve stem, valve cover, ball and drip tray, wherein: the valve cover is connected with the valve body, the ball is arranged in the valve body and can rotate under the drive of the valve stem, the valve stem is arranged in the through channel formed by valve cover and the valve body, one end extends into the valve body and is connected with the ball for controlling medium on-off, the other end is connected with the pneumatic actuator to realize driving;The valve cover is lengthened neck structure and the length of the valve cover is less than 250mm;The drip tray includes three groups, three groups of drip tray are sequentially fixed along the axial direction of the valve cover.The utility model has the beneficial effect of shortening the length of lengthened neck while ensuring the anti-condensation effect, so that the pneumatic ultralow temperature ball valve can adapt to specific working conditions.

Description

Technical Field

[0001] This utility model relates to the field of cryogenic valve technology, and in particular to a pneumatic cryogenic ball valve and an automated LNG loading skid. Background Technology

[0002] In the field of cryogenic valves, in order to prevent the temperature at the bottom of the valve stuffing box from falling below zero degrees Celsius and to avoid the impact of condensate on valve performance, conventional cryogenic valves usually adopt an extended neck valve cover structure. The length of the extended neck valve cover is designed to be greater than 250mm according to the standard, and a drip tray is welded on the extended neck.

[0003] However, under specific operating conditions, such as automated LNG loading skids, there are special requirements for the size and weight of valves, and conventional extended neck valve cover structures may not be suitable for space constraints. At the same time, the anti-condensation effect of a single drip tray can still be improved in some complex environments, which may lead to a small amount of condensate entering the insulation layer of the extended valve cover, affecting the service life and reliability of the valve.

[0004] Therefore, there is an urgent need for a pneumatic cryogenic ball valve and an automated LNG loading skid to solve the above-mentioned technical problems. Utility Model Content

[0005] The purpose of this invention is to provide a pneumatic cryogenic ball valve and an automated LNG loading skid to address the limitations of existing technologies where, under specific operating conditions, the valve's size and weight have special requirements, and conventional extended neck valve cover structures may not be suitable for space constraints. Furthermore, the anti-condensation effect of a single drip tray can still be improved in some complex environments, potentially leading to a small amount of condensate entering the extended valve cover's insulation layer, affecting the valve's service life and reliability. The various technical effects of the preferred solutions provided by this invention are detailed below.

[0006] To achieve the above objectives, the present invention provides the following technical solution:

[0007] This utility model provides a pneumatic cryogenic ball valve, comprising a valve body and a pneumatic actuator. The valve body includes a valve body, a valve stem, a valve cover, a ball, and a drip tray, wherein:

[0008] The valve cover is connected to the valve body. The ball is disposed in the valve body and can rotate under the drive of the valve stem. The valve stem passes through the through channel formed by the valve cover and the valve body. One end of the valve stem extends into the valve body and is connected to the ball to control the flow of the medium. The other end is connected to the pneumatic actuator to achieve drive.

[0009] The valve cover has an extended neck structure and the length of the valve cover is less than 250mm;

[0010] The drip tray comprises three sets, which are fixed sequentially along the axial direction of the valve cover.

[0011] Preferably, the diameter of the drip tray is larger than the outer diameter of the valve cover, and the axial distance between two adjacent drip trays is the same.

[0012] Preferably, the valve body further includes a packing assembly, which is pressed into the annular space between the valve stem and the valve body to form an axial sealing structure.

[0013] Preferably, the packing assembly includes a packing gland, a packing sleeve, a packing, a packing pad, and a spring accumulator arranged in sequence, wherein the packing gland is bolted to the valve cover to compress the packing assembly, and the packing includes flexible graphite.

[0014] Preferably, an electrostatic spring is also provided inside the valve body, the electrostatic spring being used to ensure the electrical continuity between the ball, the valve body and the valve stem.

[0015] Preferably, the electrostatic spring is disposed at the contact point between the ball and the valve stem.

[0016] Preferably, a front valve seat and a rear valve seat are provided in the valve body, and the rotation of the valve stem drives the ball to form a sealing pair with the front valve seat and the rear valve seat to achieve media isolation.

[0017] Preferably, the pneumatic cryogenic ball valve further includes a bracket, one end of which is connected to the valve body, and the other end is used to install the pneumatic actuator.

[0018] An automated LNG loading skid includes an LNG loading skid body and the aforementioned pneumatic cryogenic ball valve. The LNG loading skid body includes liquid phase and gas phase arms, and the pneumatic cryogenic ball valve is installed on the liquid phase and gas phase arms.

[0019] This utility model provides a pneumatic cryogenic ball valve and an automated LNG loading skid, including a valve body and a pneumatic actuator. The valve body includes a valve body, a valve stem, a valve cover, a ball, and a drip tray. The valve cover is connected to the valve body. The ball is located within the valve body and can rotate under the drive of the valve stem. The valve stem passes through the through-channel formed by the valve cover and the valve body, with one end extending into the valve body and connecting to the ball to control the flow of the medium, and the other end connecting to the pneumatic actuator for actuation. The valve cover has an extended neck structure with a length less than 250mm. Three sets of drip trays are fixed sequentially along the axial direction of the valve cover. By using an extended neck structure with a valve cover length less than 250mm, compared to conventional extended neck valves, it is better suited to space constraints in specific scenarios such as automated LNG loading skids, significantly improving the installation adaptability of the equipment in compact environments, while reducing the overall weight of the valve, facilitating transportation and maintenance. By setting three sets of drip trays fixed sequentially along the axial direction of the valve cover, the anti-condensation effect is significantly improved compared to the traditional single-layer drip tray, extending the valve's service life. By placing a sphere inside the valve body and linking it with the pneumatic actuator via the valve stem, automated valve opening and closing control is achieved, fulfilling the need for unmanned operation, significantly reducing manual labor intensity and safety risks, and improving filling efficiency. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0021] Figure 1 This is a schematic diagram of the structure of an embodiment of the pneumatic cryogenic ball valve of this utility model;

[0022] Figure 2 yes Figure 1 A schematic diagram of the left-side view structure.

[0023] In the diagram: 1. Valve body; 11. Valve body; 111. Front valve seat; 112. Rear valve seat; 12. Valve stem; 13. Valve cover; 14. Ball; 15. Drip tray; 16. Packing assembly; 161. Packing gland; 162. Packing sleeve; 163. Packing; 164. Packing gasket; 165. Spring accumulator; 17. Static spring;

[0024] 2. Pneumatic actuator;

[0025] 3. Bracket. Detailed Implementation

[0026] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0027] Figure 1 This is a structural schematic diagram of this embodiment. Figure 2 yes Figure 1 A schematic diagram of the left-side view structure, as shown below. Figure 1 and Figure 2 As shown, this embodiment provides a pneumatic cryogenic ball valve that shortens the extended neck length while ensuring anti-condensation effect, making it adaptable to specific working conditions. Specifically, it includes a valve body 1 and a pneumatic actuator 2. The valve body 1 includes a valve body 11, a valve stem 12, a valve cover 13, a ball 14, and a drip tray 15.

[0028] The valve cover 13 is connected to the valve body 11. The ball 14 is disposed inside the valve body 11 and can rotate under the drive of the valve stem 12. The valve stem 12 passes through the through channel formed by the valve cover 13 and the valve body 11. One end of the stem extends into the valve body 11 and is connected to the ball 14 to control the flow of the medium. The other end is connected to the pneumatic actuator 2 to achieve drive. The valve cover 13 has an extended neck structure and the length of the valve cover 13 is less than 250mm. The drip tray 15 includes three sets, and the three sets of drip trays 15 are fixed sequentially along the axial direction of the valve cover 13.

[0029] In this embodiment, the length of the extended neck valve cover 13 is designed according to the operating conditions. The extended neck valve cover 13 is made of A182 F316L material. A182 F316L material has excellent corrosion resistance, can resist the erosion of various acid and alkali media, has good mechanical properties, high strength and good toughness, and can maintain good low-temperature toughness and corrosion resistance even at operating temperatures of -196 to +80℃. It is the preferred material for the extended neck valve cover 13 in this embodiment.

[0030] Specifically, the diameter of the drip tray 15 is larger than the outer diameter of the valve cover 13, and the axial spacing between two adjacent drip trays 15 is the same. The drip tray 15 is made of 316SS material. By setting three sets of drip trays 15 and fixing them sequentially along the axial direction of the valve cover 13, compared with the traditional single-layer drip tray, it can more effectively prevent condensate from entering the packing assembly 16 area along the outer wall of the valve cover 13, ensuring that the temperature at the bottom of the stuffing box is maintained above zero degrees Celsius, effectively avoiding the impact of condensate on the sealing performance, and extending the service life of the valve.

[0031] By designing the valve cover 13 as an extended neck structure with a length of less than 250mm, it is better suited to space constraints in specific scenarios such as automated LNG loading skids compared to conventional extended neck valves. This significantly improves the equipment's adaptability to installation in compact environments while reducing the overall weight of the valve, facilitating transportation and maintenance. By setting three sets of drip trays 15 sequentially fixed along the axial direction of the valve cover 13, the anti-condensation effect is significantly improved compared to traditional single-layer drip trays, extending the valve's service life. By placing the ball 14 inside the valve body 11 and linking it with the pneumatic actuator 2 via the valve stem 12, automated valve opening and closing control is achieved, meeting the requirements for unmanned operation, significantly reducing manual labor intensity and safety risks, and improving filling efficiency.

[0032] As an optional implementation, the valve body 1 also includes a packing assembly 16, which is pressed into the annular space between the valve stem 12 and the valve body 11 to form an axial sealing structure. In use, the packing assembly 16 effectively seals the valve stem 12, preventing leakage of cryogenic media.

[0033] Specifically, the packing assembly 16 in this embodiment includes a packing gland 161, a packing sleeve 162, a packing 163, a packing pad 164 and a spring energy storage ring 165 arranged in sequence to form a multi-layer sealing structure. The packing gland 161 is connected to the valve cover 13 by bolts to achieve the compression of the packing assembly 16. The packing 163 includes flexible graphite.

[0034] As an optional implementation, an electrostatic spring 17 is also provided inside the valve body 1. The electrostatic spring 17 is used to ensure the conductive continuity between the ball 14, the valve body 11, and the valve stem 12, meeting the anti-static requirements under flammable and explosive media conditions. Specifically, in this embodiment, the electrostatic spring 17 is made of SS316 material and is located at the contact point between the ball 14 and the valve stem 12.

[0035] As an optional implementation, a front valve seat 111 and a rear valve seat 112 are provided inside the valve body 11. The rotation of the valve stem 12 drives the ball 14 to form a sealing pair with the front valve seat 111 and the rear valve seat 112 to achieve media isolation. The front valve seat 111 and the rear valve seat 112 are made of PTFE and PCTFE materials respectively to ensure the valve's bidirectional sealing performance. The ball 14, as the opening and closing element, is made of A182F316L material and forms an effective sealing pair with the front valve seat 111 and the rear valve seat 112 to ensure safe and reliable operation.

[0036] As an optional implementation, the pneumatic cryogenic ball valve also includes a bracket 3. One end of the bracket 3 is connected to the valve body 11, and the other end is used to mount the pneumatic actuator 2. Specifically, in this embodiment, the bracket 3 is made of 316SS material and is mainly used to fix the pneumatic actuator 2, providing it with stable support so that the pneumatic actuator 2 can be effectively connected to the valve stem to realize the automated operation of the valve. During connection, it is sufficient to ensure that it conforms to the relevant drive device connection standards; this is prior art and will not be elaborated upon here.

[0037] This embodiment also provides an automated LNG loading skid, including an LNG loading skid body and the aforementioned pneumatic cryogenic ball valve. The LNG loading skid body includes liquid phase and gas phase arms, and the pneumatic cryogenic ball valve is installed on the liquid phase and gas phase arms.

[0038] The pneumatic cryogenic ball valve comprises a valve body 1 and a pneumatic actuator 2. The pneumatic actuator 2, as an assembly, connects to the valve body to automate the valve's opening and closing operations, meeting the requirements of fully automated LNG loading skid operations without human intervention. The valve body 1 includes a valve body 11, a valve stem 12, a valve cover 13, a ball 14, and a drip tray 15. By designing the valve cover 13 as an extended neck structure with a length less than 250mm, it better adapts to the space constraints of specific scenarios such as automated LNG loading skids compared to conventional extended neck valves, significantly improving the equipment's installation adaptability in compact environments while reducing the overall weight of the valve, facilitating transportation and maintenance. Three sets of drip trays 15 are sequentially fixed along the axial direction of the valve cover 13, significantly improving the anti-condensation effect compared to traditional single-layer drip trays, thus extending the valve's service life. By placing the ball 14 inside the valve body 11 and linking it with the pneumatic actuator 2 via the valve stem 12, the valve's automatic opening and closing control is achieved. This meets the operational requirements of automated LNG loading skids without human intervention, significantly reducing the intensity of manual operation and safety risks, and improving the efficiency of filling operations.

[0039] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A pneumatic cryogenic ball valve, characterized in that, The valve includes a valve body and a pneumatic actuator. The valve body comprises a valve body, a valve stem, a valve cover, a ball, and a drip tray, wherein: The valve cover is connected to the valve body. The ball is disposed in the valve body and can rotate under the drive of the valve stem. The valve stem passes through the through channel formed by the valve cover and the valve body. One end of the valve stem extends into the valve body and is connected to the ball to control the flow of the medium. The other end is connected to the pneumatic actuator to achieve drive. The valve cover has an extended neck structure and the length of the valve cover is less than 250mm; The drip tray comprises three sets, which are fixed sequentially along the axial direction of the valve cover.

2. The pneumatic cryogenic ball valve according to claim 1, characterized in that: The diameter of the drip tray is larger than the outer diameter of the valve cover, and the axial distance between two adjacent drip trays is the same.

3. The pneumatic cryogenic ball valve according to claim 1 or 2, characterized in that: The valve body also includes a packing assembly, which is pressed into the annular space between the valve stem and the valve body to form an axial sealing structure.

4. The pneumatic cryogenic ball valve according to claim 3, characterized in that: The packing assembly includes a packing gland, a packing sleeve, a packing, a packing pad, and a spring accumulator arranged in sequence. The packing gland is bolted to the valve cover to compress the packing assembly. The packing includes flexible graphite.

5. The pneumatic cryogenic ball valve according to claim 1 or 2, characterized in that: An electrostatic spring is also provided inside the valve body, which is used to ensure the electrical continuity between the ball, the valve body and the valve stem.

6. The pneumatic cryogenic ball valve according to claim 5, characterized in that: The electrostatic spring is located at the contact point between the ball and the valve stem.

7. The pneumatic cryogenic ball valve according to claim 1 or 2, characterized in that: The valve body is provided with a front valve seat and a rear valve seat. The rotation of the valve stem drives the ball to form a sealing pair with the front valve seat and the rear valve seat to achieve media isolation.

8. The pneumatic cryogenic ball valve according to claim 1, characterized in that: The pneumatic cryogenic ball valve also includes a bracket, one end of which is connected to the valve body, and the other end is used to install the pneumatic actuator.

9. An automated LNG loading skid, characterized in that: The invention includes an LNG loading skid body and a pneumatic cryogenic ball valve as described in any one of claims 1-8, wherein the LNG loading skid body includes a liquid phase arm and a gas phase arm, and the pneumatic cryogenic ball valve is installed on the liquid phase arm and the gas phase arm.

Images