Throttling valve with pressure relief structure

Abstract

This utility model provides a throttle valve with a pressure relief structure, comprising: a valve body, wherein an inlet channel, a medium flow channel, and an outlet channel are sequentially connected within the valve body, and a pressure relief channel communicating with the medium flow channel is also provided within the valve body; and a pressure relief assembly, disposed at the end of the pressure relief channel away from the medium flow channel and threadedly connected to the valve body, for switching the pressure relief channel between open and closed states. This solution, by providing a pressure relief channel and a pressure relief assembly, allows for pressure relief before the throttle valve is decommissioned, preventing injury to operators due to excessive residual pressure inside the throttle valve during removal.

Description

Technical Field

[0001] This utility model relates to the field of throttle valve technology, and in particular to a throttle valve with a pressure relief structure. Background Technology

[0002] Traditional throttle valves used in high pressure differential conditions operate at pressures up to 69 MPa and differential pressures up to 40 MPa, while also involving three-phase flow (solid, liquid, and gas). When a throttle valve needs to be taken offline, the shut-off valves at both ends must be closed first. At this time, some medium pressure will remain inside the valve body. Direct disassembly would pose a safety hazard on site. Summary of the Invention

[0003] This invention provides a throttle valve with a pressure relief structure to solve the above-mentioned technical problems.

[0004] This utility model provides a throttle valve with a pressure relief structure, the throttle valve with the pressure relief structure includes:

[0005] The valve body is provided with an inlet channel, a medium flow channel and an outlet channel that are connected in sequence. The valve body is also provided with a pressure relief channel that is connected to the medium flow channel.

[0006] A pressure relief assembly is disposed at the end of the pressure relief channel away from the medium flow channel and is threadedly connected to the valve body, for switching the pressure relief channel between open and closed states.

[0007] In one embodiment of this utility model, a conical opening and a mounting groove are sequentially provided at the end of the pressure relief channel away from the medium flow channel, with the diameter of the conical opening gradually increasing and the conical opening communicating with the mounting groove. An internal thread is provided in the mounting groove. The pressure relief assembly is provided with a frustum for sealing the conical opening and an external thread for connecting with the mounting groove.

[0008] In one embodiment of the present invention, the pressure relief assembly includes:

[0009] The pressure relief pipe plug has a stepped surface on its circumference, a truncated cone is provided at one end of the pressure relief pipe plug near the valve body, a pressure relief flow path is provided inside the pressure relief pipe plug, and a connecting channel communicating with the pressure relief flow path is opened on the outer side of the pressure relief pipe plug near the truncated cone.

[0010] The connecting sleeve is fitted over the pressure relief pipe plug with a clearance fit. The connecting sleeve has a mating surface inside for sealing and limiting the pressure relief pipe plug by mating with the stepped surface. The connecting sleeve has an external thread.

[0011] In one embodiment of this utility model, the pressure relief flow path is arranged along the axis of the pressure relief pipe plug, the pressure relief flow path and the pressure relief channel are arranged on the same straight line, and the pressure relief flow path and the connecting channel are arranged perpendicularly.

[0012] In one embodiment of the present invention, the inlet channel and the pressure relief component are disposed on opposite sides, the outlet channel is disposed at the bottom of the valve body, and the outlet channel and the inlet channel are vertically distributed.

[0013] In one embodiment of the present invention, the valve body is provided with an installation cavity, and from top to bottom, the installation cavity is provided with an installation seat, a throttling component and a valve seat in sequence. The medium flow channel is formed in the throttling component and the outflow channel is provided in the valve seat.

[0014] In one embodiment of the present invention, the throttling valve further includes a valve core and a valve stem. The mounting base and the throttling assembly are provided with a movable channel for the valve core and the valve stem. The valve core is disposed in the movable channel, and one end of the valve stem extends into the movable channel and is connected to the valve core. The valve core is used to move relative to the valve seat to connect and block the movable channel with the outflow channel.

[0015] In one embodiment of the present invention, the throttling component is provided with a throttling orifice that connects the inlet channel and the movable channel, and the throttling orifice and the movable channel are connected to form the medium flow channel.

[0016] In one embodiment of the present invention, the throttling component is provided with a protective sleeve, the protective sleeve is fitted onto the inner wall of the mounting cavity, a flow ring cavity is formed between the protective sleeve and the throttling component, and the flow ring cavity is connected to the pressure relief channel.

[0017] In one embodiment of the present invention, the protective sleeve includes a body that is assembled with the mounting cavity, a hard alloy inlay is disposed in the body, and the flow ring cavity is formed between the hard alloy inlay and the outer wall of the throttling component.

[0018] This utility model also provides a throttle valve with a pressure relief structure, the throttle valve with the pressure relief structure comprising:

[0019] The beneficial effects of this utility model are as follows: The throttle valve with a pressure relief structure proposed in this utility model facilitates the entry and exit of the medium into the throttle valve through the arrangement of the inlet channel, the medium flow channel and the outlet channel, and facilitates the pressure relief channel and pressure relief component to perform pressure relief operation before the throttle valve is decommissioned.

[0020] When the throttle valve is to be taken offline, first close the shut-off valves at both ends of the throttle valve, then loosen the pressure relief assembly to open the pressure relief channel, thus releasing pressure. After pressure relief is complete, remove the throttle valve. When the throttle valve is in operation, tighten the pressure relief assembly to seal the pressure relief channel and prevent media from flowing out. This solution, by setting up a pressure relief channel and assembly, allows for pressure relief before the throttle valve is taken offline, preventing injury to operators due to excessive residual pressure inside the throttle valve during removal. Attached Figure Description

[0021] The accompanying drawings, which are incorporated in and form part of this specification, illustrate embodiments consistent with this application and, together with the description, serve to explain the principles of this application. It is obvious that the drawings described below are merely some embodiments of this application, and those skilled in the art can obtain other drawings based on these drawings without any inventive effort.

[0022] In the attached diagram:

[0023] Figure 1 This is a schematic diagram of a throttle valve with a pressure relief structure provided in an embodiment of the present invention.

[0024] Figure 2 for Figure 1 Enlarged view of point A in the middle.

[0025] Figure 3 for Figure 1 Enlarged view of point B in the middle.

[0026] The attached figures are labeled as follows:

[0027] Valve body 1, inlet channel 101, outlet channel 102, pressure relief channel 103, conical orifice 1031, mounting groove 1032, flow annular cavity 104.

[0028] Valve cover 2,

[0029] Mounting base 3

[0030] Throttling assembly 4, throttling orifice 401,

[0031] Valve seat 5,

[0032] Protective case 6, main body 601, hard alloy inlay 602,

[0033] Pressure relief assembly 7, pressure relief pipe plug 701, pressure relief flow path 7011, connecting channel 7012, frustum 7013, stepped surface 7014, connecting sleeve 702, mating surface 7021.

[0034] Valve stem 8

[0035] Valve core 9. Detailed Implementation

[0036] The following specific examples illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification. This utility model can also be implemented or applied through other different specific embodiments. Various details in this specification can also be modified or changed based on different viewpoints and applications without departing from the spirit of this utility model. In the absence of conflict, the following embodiments and features in the embodiments can be combined with each other.

[0037] It should be noted that the illustrations provided in the following embodiments are only schematic representations of the basic concept of the present invention. The drawings only show the components related to the present invention and are not drawn according to the actual number, shape and size of the components. In actual implementation, the form, quantity and proportion of each component can be arbitrarily changed, and the layout of the components may also be more complex.

[0038] In the following description, numerous details are explored to provide a more thorough explanation of embodiments of the present invention. However, it will be apparent to those skilled in the art that embodiments of the present invention may be practiced without these specific details. In other embodiments, well-known structures and devices are shown in block diagram form rather than in detail to avoid obscuring embodiments of the present invention.

[0039] Please see Figures 1 to 3 As shown, an embodiment of the present invention provides a throttle valve with a pressure relief structure, comprising:

[0040] Valve body 1, which is provided with an inlet channel 101, a medium flow channel and an outlet channel 102 that can be connected in sequence. Valve body 1 is also provided with a pressure relief channel 103 that is connected to the medium flow channel.

[0041] The pressure relief assembly 7 is located at the end of the pressure relief channel 103 away from the medium flow channel and is threadedly connected to the valve body 1. By rotating the pressure relief assembly 7, the pressure relief channel 103 can switch between open and closed states.

[0042] When using the throttle valve, before shutting it off, first close the shut-off valves at both ends of the throttle valve, then loosen the pressure relief assembly 7 to open the pressure relief channel 103 to release pressure. After pressure relief is complete, remove the throttle valve. When the throttle valve is in operation, tighten the pressure relief assembly 7 to block the pressure relief channel 103 and prevent the medium from flowing out of the pressure relief channel 103.

[0043] In this embodiment, the inlet channel 101, the medium flow channel, and the outlet channel 102 are provided to facilitate the medium entering and exiting the throttle valve. The pressure relief channel 103 and the pressure relief assembly 7 are provided to facilitate pressure relief operation before the throttle valve is decommissioned.

[0044] Appendix Figure 1 The middle arrow points to the direction of medium flow.

[0045] In an exemplary embodiment, a conical opening 1031 and a mounting groove 1032 are sequentially provided at the end of the pressure relief channel 103 away from the medium flow channel. The diameter of the conical opening 1031 gradually increases, and the conical opening 1031 communicates with the mounting groove 1032. An internal thread is provided in the mounting groove 1032. The pressure relief assembly 7 is provided with a frustum 7013 for sealing the conical opening 1031 and an external thread for connecting with the mounting groove 1032.

[0046] In this embodiment, the conical opening 1031 and the frustum 7013 are provided to facilitate better sealing and opening of the pressure relief channel 103, and the mounting groove 1032 is provided to facilitate the installation of the pressure relief assembly 7. The pressure relief assembly 7 is installed on the valve body 1 through internal and external threads, so that the pressure relief channel 103 can be opened and sealed by rotating the pressure relief assembly 7, which is convenient to use.

[0047] In an exemplary embodiment, a pressure relief pipe plug 701 is provided with a stepped surface 7014 on its circumference, a frustum 7013 is provided at one end of the pressure relief pipe plug 701 near the valve body 1, a pressure relief flow path 7011 is provided inside the pressure relief pipe plug 701, and a connecting channel 7012 communicating with the pressure relief flow path 7011 is opened on the outer side of the pressure relief pipe plug 701 near the frustum 7013.

[0048] The connecting sleeve 702 is fitted over the pressure relief pipe plug 701 with a clearance fit. The connecting sleeve 702 has a mating surface 7021 inside for mating with the stepped surface 7014 to seal and limit the pressure relief pipe plug 701. The connecting sleeve 702 has an external thread.

[0049] For example, the truncated cone 7013 is disposed at one end of the pressure relief pipe plug 701 near the conical opening 1031 (or flared opening) to achieve the sealing and opening of the conical opening 1031.

[0050] For example, the pressure relief flow path 7011 is arranged along the axis of the pressure relief pipe plug 701, and the connecting channel 7012 is opened in the radial direction of the pressure relief pipe plug 701.

[0051] For example, the connecting channel 7012 is provided at one end of the connecting sleeve 702 near the pressure relief channel 103, and is connected to the gap between the connecting sleeve 702 and the pressure relief pipe plug 701.

[0052] For example, the outlet of the pressure relief flow path 7011 is located on the end face of the pressure relief pipe plug 701 away from the frustum 7013.

[0053] It is worth noting that the pressure relief pipe plug 701 is set to open and block the pressure relief channel 103, and the connecting sleeve 702 is set to connect with the valve body 1, while also limiting the pressure relief pipe plug 701.

[0054] In use, the connecting sleeve 702 is sleeved over the pressure relief pipe plug 701. When the connecting sleeve 702 is rotated to connect with the valve body 1 by thread, the pressure relief pipe plug 701 will not rotate with the connecting sleeve 702 because there is a fitting gap between the connecting sleeve 702 and the pressure relief pipe plug 701. The stepped surface 7014 and the mating surface 7021 are set so that after the mating surface 7021 abuts against the stepped surface 7014, as the connecting sleeve 702 continues to rotate in, it will push the frustum 7013 of the pressure relief pipe plug 701 to block the conical opening 1031, thereby sealing the pressure relief channel 103. At the same time, the stepped surface 7014 and the mating surface 7021 cooperate to form a seal. When pressure relief is required, the connecting sleeve 702 is rotated outward, and the mating surface 7021 disengages from the stepped surface 7014. The pressure relief pipe plug 701 moves outward under the residual pressure inside the valve body 1 until the stepped surface 7014 abuts against the mating surface 7021 to seal. A pressure relief channel is formed between the conical opening 1031 and the frustum 7013. The gas discharged from the pressure relief channel 103 is discharged through the pressure relief channel, the mounting groove 1032, the gap between the pressure relief pipe plug 701 and the connecting sleeve 702, the connecting channel 7012, and the pressure relief flow path 7011.

[0055] It should be noted that, due to the large internal pressure of the throttle valve, in order to avoid the high pressure discharge causing harm to the operator, a small pressure relief channel for slow pressure relief can be formed between the conical orifice 1031 and the frustum 7013 by means of the structural design of the conical orifice 1031 and the frustum 7013 through slight rotation of the thread.

[0056] In an exemplary embodiment, the pressure relief flow path 7011 and the pressure relief channel 103 are arranged on the same straight line, and the pressure relief flow path 7011 and the connecting channel 7012 are arranged perpendicularly.

[0057] In this embodiment, the pressure relief channel 103, the pressure discharge channel, the connecting channel 7012, and the pressure relief flow path 7011 form a curved pressure discharge channel to reduce the pressure of the discharged medium.

[0058] For example, the connecting channel 7012 can also be set at an angle, with the connecting channel 7012 directly opened at the position with the largest diameter of the frustum 7013, so as to achieve communication with the mounting groove 1032.

[0059] In an exemplary embodiment, the inlet channel 101 and the pressure relief assembly 7 are disposed on opposite sides, and the outlet channel 102 is disposed at the bottom of the valve body 1, with the outlet channel 102 and the inlet channel 101 being vertically distributed between them.

[0060] In this embodiment, the medium is side-inlet and bottom-outlet, and the pressure of the medium itself can increase the seal between the valve core 9 and the valve seat 5.

[0061] In an exemplary embodiment, the valve body 1 is provided with an installation cavity. From top to bottom, the installation cavity is provided with an installation seat 3, a throttling component 4 and a valve seat 5 in sequence. The medium flow channel is formed in the throttling component 4 and the outflow channel 102 is provided in the valve seat 5.

[0062] In this embodiment, the installation cavity is opened to install the mounting base 3, the throttling component 4 and the valve seat 5. The throttling component 4 is set to achieve throttling, noise reduction and speed reduction of the medium, thereby reducing the scouring force of the medium on the valve core 9.

[0063] For example, the throttle valve also includes a valve cover 2, which is disposed on the top of the valve body 1. One end of the mounting base 3 extends into the valve cover 2, and a sealing structure (such as a sealing ring) is provided between the mounting base 3 and the valve body 1 and the valve cover 2.

[0064] In an exemplary embodiment, the throttle valve further includes a valve core 9 and a valve stem 8. The mounting base 3 and the throttle assembly 4 are provided with a movable channel for the valve core 9 and the valve stem 8. The valve core 9 is disposed in the movable channel, and one end of the valve stem 8 extends into the movable channel and is connected to the valve core 9. The valve core 9 is used to move relative to the valve seat 5 to connect and block the movable channel with the outflow channel 102.

[0065] For example, the valve stem 8 passes through the valve cover 2 and extends into the movable channel, and a sealing structure (such as a sealing ring) is provided between the valve stem 8 and the valve cover 2.

[0066] In this embodiment, by operating the valve stem 8 up and down, the valve core 9 can block or open the outflow channel 102 on the valve seat 5, thereby realizing the opening and closing of the valve.

[0067] In an exemplary embodiment, the throttling assembly 4 has a throttling orifice 401 that connects the inlet channel 101 and the movable channel, and the throttling orifice 401 and the movable channel are connected to form a medium flow channel.

[0068] For example, the throttling assembly 4 includes multiple overlapping throttling plates, with a throttling orifice 401 disposed between two adjacent throttling plates.

[0069] In an exemplary embodiment, the throttling component 4 is covered with a protective sleeve 6, which is fitted onto the inner wall of the mounting cavity. A flow ring cavity 104 is formed between the protective sleeve 6 and the throttling component 4, and the flow ring cavity 104 is connected to the pressure relief channel 103.

[0070] It is worth noting that the flow ring cavity 104 serves to connect each throttling orifice 401 with the inlet channel 101.

[0071] It should also be noted that, because the medium can easily erode the inner wall of the valve body 1 (i.e., the inner wall of the mounting cavity), causing damage to the valve body 1 and affecting its service life, a protective sleeve 6 is installed inside the valve body 1 to protect the inner wall of the valve body 1. Because of the protective sleeve 6, after the medium enters from the inlet channel 101, it enters between the protective sleeve 6 and the throttling assembly 4, then passes around and enters the interior of the throttling assembly 4 through the throttling orifice 401 surrounding the throttling assembly 4. When the valve core 9 moves away from the valve seat 5, the outlet channel 102 connects with the interior of the throttling assembly 4 to facilitate the flow of the medium.

[0072] For example, there will be a small assembly gap between the outer wall of the protective sleeve 6 and the inner cavity of the valve body 1, and there will be a small assembly gap between the end of the protective sleeve 6 and the valve seat 5 and the mounting base 3, so that the pressure relief channel 103 is connected to the throttle hole 401, etc.

[0073] In an exemplary embodiment, the protective sleeve 6 includes a body 601 that is assembled with the mounting cavity, a hard alloy inlay 602 is disposed in the body 601, and a flow ring cavity 104 is formed between the hard alloy inlay 602 and the outer wall of the throttling component 4.

[0074] In this embodiment, the body 601 is made of metal such as steel. In order to protect the body 601, a hard alloy 602 is embedded in the body 601 to play a protective role.

[0075] For example, to increase the service life of the throttling component 4, the throttling component 4 may also be made of hard alloy.

[0076] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A throttle valve having a pressure relief structure, characterized by, include: The valve body is provided with an inlet channel, a medium flow channel and an outlet channel that are connected in sequence. The valve body is also provided with a pressure relief channel that is connected to the medium flow channel. The pressure relief channel and the inlet channel are located on opposite sides of the valve body. A pressure relief assembly is disposed at the end of the pressure relief channel away from the medium flow channel and is detachably connected to the valve body, for switching the pressure relief channel between open and closed states.

2. The throttle valve with pressure relief structure according to claim 1, characterized by, In the direction away from the medium flow channel, the end of the pressure relief channel away from the medium flow channel is provided with a conical opening and a mounting groove in sequence. The diameter of the conical opening gradually increases, and the conical opening is connected to the mounting groove. The mounting groove is provided with an internal thread. The pressure relief assembly is provided with a frustum for sealing the conical opening and an external thread for connecting with the mounting groove.

3. The throttling valve with pressure relief structure according to claim 2, characterized in that, The pressure relief assembly includes: The pressure relief pipe plug has a stepped surface on its circumference, a truncated cone is provided at one end of the pressure relief pipe plug near the valve body, a pressure relief flow path is provided inside the pressure relief pipe plug, and a connecting channel communicating with the pressure relief flow path is opened on the outer side of the pressure relief pipe plug near the truncated cone. The connecting sleeve is fitted over the pressure relief pipe plug with a clearance fit. The connecting sleeve has a mating surface inside for sealing and limiting the pressure relief pipe plug by mating with the stepped surface. The connecting sleeve has an external thread.

4. The pressure relief structure provided throttle valve according to claim 3, wherein The pressure relief flow path is arranged along the axis of the pressure relief pipe plug, the pressure relief flow path and the pressure relief channel are arranged on the same straight line, and the pressure relief flow path and the connecting channel are arranged perpendicularly.

5. The pressure relief structure provided throttle valve according to claim 1, wherein The inlet channel and the pressure relief assembly are located on opposite sides, and the outlet channel is located at the bottom of the valve body. The outlet channel and the inlet channel are vertically distributed.

6. The pressure relief structure provided throttle valve according to any one of claims 1 to 5, characterized by, The valve body is provided with an installation cavity. From top to bottom, the installation cavity is provided with an installation seat, a throttling component and a valve seat in sequence. The medium flow channel is formed in the throttling component and the outflow channel is provided in the valve seat.

7. The pressure relief structure provided throttle valve according to claim 6, wherein The throttling valve also includes a valve core and a valve stem. The mounting base and throttling assembly are provided with a movable channel for the valve core and valve stem. The valve core is disposed in the movable channel, and one end of the valve stem extends into the movable channel and is connected to the valve core. The valve core is used to move relative to the valve seat to connect and block the movable channel with the outflow channel.

8. The pressure relief structure having a throttle valve according to claim 7, wherein The throttling assembly has a throttling orifice that connects the inlet channel and the movable channel, and the throttling orifice and the movable channel are connected to form the medium flow channel.

9. The throttling valve with pressure relief structure according to claim 6, characterized by, The throttling component is covered with a protective sleeve, which is fitted onto the inner wall of the mounting cavity. A flow ring cavity is formed between the protective sleeve and the throttling component, and the flow ring cavity is connected to the pressure relief channel.

10. The throttling valve with pressure relief structure according to claim 9, characterized by, The protective sleeve includes a body that is assembled with the mounting cavity, and a hard alloy inlay is disposed within the body. The flow ring cavity is formed between the hard alloy inlay and the outer wall of the throttling component.

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