Integrated compact combined type double-gate valve with check function

Abstract

A valve body is provided with two vertical inner cavities for containing internal parts of two sets of gate valves, the two vertical inner cavities share the same pressure-bearing partition plate to form the 8-shaped compact valve body, and guide grooves for guiding gate plates are formed in the vertical inner cavities. Two pairs of parallel valve seat holes which are located in the side face of the vertical inner cavity and matched with a gate valve seat are formed in the horizontal channel. Compared with a single gate valve, the check valve is more reliable in sealing, has the function of a check valve, and is compact in structure, small in installation space, short in construction period and low in welding seam heat treatment and inspection cost, and welding seams of multi-valve connection do not exist as compared with a valve group with the same function formed by welding single valves.

Description

Technical Field

[0001] This utility model belongs to the field of valve design and manufacturing, specifically relating to an integrated compact combined double gate valve with check valve. Background Technology

[0002] To ensure reliable sealing, existing process pipelines operating under harsh conditions often use two or more individual on / off valves (such as gate valves, globe valves, ball valves, check valves, etc.) welded together to achieve double shut-off and check valve requirements. This results in a large number of welds, large installation space, long construction period, and high costs for weld heat treatment and inspection. Furthermore, existing individual on / off valves (such as gate valves and ball valves) do not have the function of check valves. Utility Model Content

[0003] The purpose of this utility model is to provide a compact combined double gate valve with check valve function that is reliably sealed.

[0004] The technical solution of this utility model is:

[0005] An integrated compact combined double gate valve with check valve is characterized in that: the valve body has two vertical inner cavities that accommodate two sets of internal parts of the gate valve, the two vertical inner cavities share the same pressure-bearing baffle to form an 8-shaped compact valve body, the vertical inner cavity has a guide groove for gate guidance, and the horizontal channel has two sets of parallel valve seat holes located on the side of the vertical inner cavity that cooperate with the gate valve seat.

[0006] When two sets of wedge-shaped valve seats are welded into the two auxiliary valve seat holes, two wedge gates or two sets of separate wedge gates or one set of separate wedge gates or one integrated wedge gate are installed; when two sets of parallel valve seats are welded into the valve seat holes, two sets of parallel gates are installed; when one set of wedge-shaped valve seats and another set of parallel valve seats are welded into the valve seat holes, one integrated wedge gate or a combination of one set of separate wedge gates and one set of parallel gates is installed; the integrated wedge gate, separate gate, and parallel gate have the same width and thickness, and the same connection dimensions with the valve stem T-head. All three types of gates can be connected to the same valve stem, and the valve stem drives the gate to move in the guide groove of the valve body. The guide groove restricts the disengagement of the parallel and separate gates;

[0007] The same valve body can be combined with different valve seats and gates to form the following six forms: double integrated wedge, double separate wedge, double parallel, integrated wedge and parallel, integrated wedge and separate wedge, and separate and parallel.

[0008] On the outlet side of the valve body channel, there are threaded holes for connecting to the valve seat of the outlet axial flow check valve, flow path curves for the medium, and threaded holes for fixing the valve disc bracket. The valve seat, valve disc with front and rear guides and flow guide curves, spring, spring seat, and valve disc bracket are installed in the valve body to form the outlet check valve. On the inlet side of the valve body channel, there are threaded holes for connecting to the valve seat of the inlet axial flow check valve and flow path curves for the medium. The valve seat and valve disc bracket are integral guide valve seats that cooperate with valve discs with flow guide curves whose center of gravity is close to the valve seat sealing surface. Spring 12 is tightened onto the valve disc with a threaded spring seat and a lock nut to form an assembly installed at the inlet end of the valve body to form the inlet check valve. The same valve body can be in the form of check valves at the inlet and outlet, check valves only at the inlet, or check valves only at the outlet, as needed.

[0009] The valve cover, self-sealing ring, screw cap, transition plate, valve cover clamping nut, packing, packing sleeve, packing pressure plate, stud, nut, and preload screw constitute the pressure self-sealing between the valve cover and the valve body, and the sealing between the valve stem and the packing.

[0010] A transition plate is installed between the valve cover clamping nut and the top surface of the valve body. The support column is installed in the screw hole of the transition plate. The support plate is connected to the support column with screws. A guide block is installed on the valve stem. The hole on the guide block matches the support column to prevent the valve stem from rotating and to indicate the opening position of the valve stem. The support column connection hole on the support plate is offset from the gearbox seat connection hole. The gearbox seats of the bevel gear device and the spur gear drive device, as well as the bearing seat of the large handwheel operation, are all interchangeable and fixed on the support plate. The type and orientation of the operating device can be easily adjusted and selected.

[0011] The shoulder of the under-mounted valve stem nut seat is equipped with two planar bearings. The bearing caps axially fix the valve stem nut seat and the two planar bearings in the gearbox seat. The coarse thread on the valve stem nut is tightened to the valve stem nut seat, and the fine thread anti-loosening nut is tightened to the valve stem nut seat. The plane of the coarse thread valve stem nut and the fine thread anti-loosening nut are engaged to form a reliable anti-loosening mechanism. The vertical axial force of the valve stem is transmitted from the valve stem nut to the shoulder of the valve stem nut seat and the planar bearings, and terminates in the gearbox seat. It is not transmitted to the housing of the bevel gear device or the gear ring of the planetary spur gear drive device. The bottom-mounted valve stem nut seat can be either long or short extension type. When two short extension valve stem nut seats are used, they are used to install two bevel gear drive devices, two planetary spur gear drive devices, or one bevel gear device and one spur gear drive device. When operating with a large handwheel of one bevel gear device and one gearless device, the handwheel is installed on the long extension valve stem nut seat, so that the height of the handwheel exceeds the top of the bevel gear device protective cover, so that the bevel gear drive device and the large handwheel can be operated without interference.

[0012] The large bevel gear and the planetary carrier of the planetary gear in the bevel gear drive unit have the same dimensions and position for connection with the short extended valve stem nut seat. Neither the bevel gear drive housing nor the internal gear ring of the planetary gear drive bears the axial force of the valve stem. The gearbox housing connection is reliable, cost-effective, and highly versatile.

[0013] The connection method is two-end flanges or two-button welded ends, and the valve cover is bolted; the pneumatic and electric operating structure is installed on the support plate and its bracket.

[0014] The manual valve structure adopts an integrated compact double gate valve with a small forged steel high and low handwheel. The small diameter section of the extended handwheel operating handle allows for interference-free operation of the two handwheels within a compact center distance. The larger-sized flat round casting bracket structure is compact and can operate the double gate valve. The width of the flat cavity bracket is slightly larger than the diameter of the gear head to achieve a compact effect.

[0015] The advantages of this utility model are:

[0016] This invention provides a more reliable seal than a single gate valve and also functions as a check valve. Compared to a valve group with the same function composed of individual valves welded together, it has a compact structure, requires less installation space, eliminates the need for welds connecting multiple valves, has a shorter construction period, and lower costs for weld heat treatment and inspection.

[0017] Two gate valves share a pressure-bearing baffle on the same valve body, and two check valves utilize the flow channel space at both ends of the gate valves, making the integrated multi-functional valve body structure compact, reducing the valve body length, reducing the processing difficulty, and improving the valve's cost-effectiveness.

[0018] The built-in threaded axial flow check valve has no external leakage points, is easy to install and connect, and has low flow resistance and impact. According to pipeline process requirements, it can be adapted and processed on the same valve body to be used for double check valves, single check valves at the inlet or outlet end, or without check valves.

[0019] The universal operating connection platform allows for the installation of different drive devices, which not only avoids the interference problem of the operating handwheel of the compact valve structure, but also allows for the selection of different operating handwheel positions according to operational needs, making operation more convenient. The gearbox does not bear the axial force of the valve stem, the drive device has a high cost performance, and the connection is more reliable. Attached Figure Description

[0020] Figure 1 This is a schematic diagram of a compact, integrated double gate valve body with check valve.

[0021] Figure 2 yes Figure 1 AA sectional view.

[0022] Figure 3 This is a schematic diagram of the opening position of a compact, integrated bevel gear operating double check valve with a double gate plate.

[0023] Figure 4 This is a schematic diagram of the closed position of a compact bevel gear handwheel operated with a double check valve and a split gate valve.

[0024] Figure 5 This is a schematic diagram of the closed position of a compact double bevel gear operated double parallel gate valve with single check valve.

[0025] Figure 6 yes Figure 5 AA sectional view.

[0026] Figure 7 It is an integrated compact double spur gear operated double gate valve outline drawing.

[0027] Figure 8 This is an outline drawing of a compact, high / low handwheel double gate valve.

[0028] Figure 9 It is an integrated compact double bevel gear operated flat round bracket butt welded end double gate valve outline drawing Detailed Implementation

[0029] See Figures 1 to 5 A compact, integrated double gate valve with check valve is disclosed. The valve body 1 has two vertical cavities that accommodate two sets of gate valve internal parts. The two cavities share the same pressure-bearing baffle 33 to form an 8-shaped compact valve body. The vertical cavities have guide grooves for gate guidance, and the horizontal channels have two sets of parallel valve seat holes located on the sides of the vertical cavities that mate with the gate valve seats. If two sets of wedge-shaped valve seats 2 are welded into the two sets of valve seat holes, two wedge gates 3, or two sets of separate wedge gates 34, or one set of separate wedge gates 34 and one integrated wedge gate 3 can be installed as required. If two sets of parallel valve seats 35 are welded into the valve seat holes, two sets of parallel gates 36 can be installed. If one set of wedge-shaped valve seats 2 and the other set of parallel valve seats 35 are welded into the valve seat holes, one integrated wedge gate 3 or a combination of one set of separate wedge gates 34 and one set of parallel gates 36 can be installed as required. The integrated wedge gate 3, the separate gate 34, and the parallel gate 36 have the same width and thickness, and the same connection dimensions with the valve stem T-head. All three types of gates can be connected to the same valve stem 4, and the valve stem drives the gate to move within the guide groove of the valve body. The guide groove restricts the disengagement of the parallel and separate gates. The same valve body can form the following six combinations by different valve seats and gates: double integrated wedge, double separate wedge, double parallel, integrated wedge and parallel, integrated wedge and separate wedge, and separate and parallel.

[0030] The valve cover, self-sealing ring, screw cap, transition plate, valve cover clamping nut, packing, packing sleeve, packing pressure plate, stud, nut, and preload screw constitute the pressure self-sealing between the valve cover and the valve body, and the sealing between the valve stem and the packing.

[0031] The outlet side 38 of the valve body passage is machined with a threaded hole for connecting to the valve seat of the outlet axial flow check valve, a flow path curve for the medium, and a threaded hole for fixing the valve disc holder. The valve seat 5, the valve disc 6 with front and rear guides and flow guiding curves, the spring 7, the spring seat 8, and the valve disc holder 9 are installed into the valve body 1 to form the outlet check valve 40. The inlet side 39 of the valve body passage is machined with a threaded hole for connecting to the valve seat of the inlet axial flow check valve, and a flow path curve for the medium. The valve seat 10, which is an integral part of the valve seat and valve disc holder, with a guide, is fitted with the valve disc 11, whose center of gravity is close to the valve seat sealing surface and has a flow guiding curve. A spring 12 is installed, and the assembly is tightened onto the valve disc using a threaded spring seat 13 and a locking nut 14. This assembly is then installed into the inlet end of the valve body to form the inlet check valve 41. The same valve body can be manufactured in various combinations as needed, including inlet and outlet check valves, inlet check valves only, outlet check valves only, and no check valves.

[0032] The transition plate 15 is installed between the valve cover clamping nut and the top surface of the valve body. The support column 16 is installed in the screw hole of the transition plate. The support plate 17 is connected to the support column with screws. The valve stem 4 is equipped with a guide block 18. The hole on the guide block 18 matches the support column 16 to prevent the valve stem 4 from rotating and to indicate the opening position of the valve stem 4. The support column connection hole on the support plate 17 is offset from the gearbox seat connection hole. The gearbox seat 20 of the bevel gear device 42 and the spur gear drive device 43, as well as the bearing seat 20 of the large handwheel operation, are all interchangeable and fixed on the support plate 17. The type and orientation of the operating device can be easily adjusted and selected.

[0033] The under-mounted valve stem nut seat 19 has two planar bearings mounted on its shoulder. Bearing caps 23 axially fix the valve stem nut seat 19 and the two planar bearings within the gearbox seat 20. The coarse-pitch long thread on the valve stem nut 21 is tightened into the valve stem nut seat 19. A fine-pitch anti-loosening nut 22 is then tightened into the valve stem nut seat 19. The planar engagement of the coarse-pitch valve stem nut 21 and the fine-pitch anti-loosening nut 22 forms a reliable anti-loosening mechanism. The vertical axial force of the valve stem 4 is transmitted from the valve stem nut 21 to the shoulder of the valve stem nut seat 19 and the planar bearings, terminating at the gearbox seat 20. It is not transmitted to the housing 24 of the bevel gear unit or the gear ring body 25 of the planetary spur gear drive unit. The under-mounted valve stem nut seat has two forms: long extension and short extension. Two short extension valve stem nut seats 19 are used to install two bevel gear drive units 42, two planetary spur gear drive units 43, or one bevel gear unit 42 and one spur gear drive unit 43. When operating with a bevel gear device 42 and a large handwheel without a gear, the handwheel 26 is mounted on the extended valve stem nut seat 119, so that the height of the handwheel 26 exceeds the top of the bevel gear device protective cover 27, so that the bevel gear drive device 42 and the large handwheel 26 can be operated without interference.

[0034] Figure 8The manual valve structure is a compact double gate valve with a small forged steel high and low handwheel. The small diameter section of the extended handwheel operating handle 31 allows the second handwheel 32 to operate without interference in a compact center distance. Figure 9 The larger-sized flat round casting bracket 30 has a compact structure and can operate a double gate valve. The width of the flat cavity bracket 30 is slightly larger than the diameter of the gear head 42 to achieve a compact effect.

[0035] The integrated compact double gate valve with check valve can be connected by two flanges or two welded ends, and the valve cover can be bolted. Other operating structures such as pneumatic and electric actuators can be installed on the support plate 17 and bracket 30.

[0036] The large bevel gear 28 and the planetary carrier 29 of the planetary gear drive have the same dimensions and position for connection with the short extended valve stem nut seat. Neither the bevel gear drive housing nor the internal gear ring of the planetary gear drive bears the axial force of the valve stem. The gearbox housing connection is reliable, cost-effective, and highly versatile.

[0037] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the present utility model in any way. Although the present utility model has been disclosed above with reference to a preferred embodiment, it is not intended to limit the present utility model. Any person skilled in the art can make slight modifications or changes to equivalent embodiments based on the disclosed technical solutions without departing from the scope of the present utility model. Any simple modifications, equivalent substitutions, and improvements made to the above embodiments without departing from the scope of the present utility model and within the spirit and principles of the present utility model shall still fall within the protection scope of the present utility model.

Claims

1. An integrated, compact, combined double gate valve with check valve, characterized in that: The valve body has two vertical inner cavities that accommodate two sets of internal parts of the gate valve. The two vertical inner cavities share the same pressure-bearing baffle to form a figure-eight compact valve body. The vertical inner cavities have guide grooves for gate guidance, and the horizontal channel has two sets of parallel valve seat holes located on the side of the vertical inner cavities that cooperate with the gate valve seats. When two sets of wedge-shaped valve seats are welded into the two auxiliary valve seat holes, two wedge gates or two sets of separate wedge gates or one set of separate wedge gates or one integrated wedge gate are installed; when two sets of parallel valve seats are welded into the valve seat holes, two sets of parallel gates are installed; when one set of wedge-shaped valve seats and another set of parallel valve seats are welded into the valve seat holes, one integrated wedge gate or a combination of one set of separate wedge gates and one set of parallel gates is installed; the integrated wedge gate, separate gate, and parallel gate have the same width and thickness, and the same connection dimensions with the valve stem T-head. All three types of gates can be connected to the same valve stem, and the valve stem drives the gate to move in the guide groove of the valve body. The guide groove restricts the disengagement of the parallel and separate gates; The same valve body can be combined with different valve seats and gates to form the following six forms: double integrated wedge, double separate wedge, double parallel, integrated wedge and parallel, integrated wedge and separate wedge, and separate and parallel. On the outlet side of the valve body channel, there are threaded holes for connecting to the valve seat of the outlet axial flow check valve, a flow path curve for the medium, and threaded holes for fixing the valve disc bracket. The valve seat, valve disc with front and rear guides and flow guide curves, spring, spring seat, and valve disc bracket are installed in the valve body to form the outlet check valve. On the inlet side of the valve body channel, there are threaded holes for connecting to the valve seat of the inlet axial flow check valve and a flow path curve for the medium. The valve seat and valve disc bracket are integral, with a guide valve seat and a valve disc with a flow guide curve whose center of gravity is close to the valve seat sealing surface. The spring is tightened onto the valve disc with a threaded spring seat and a lock nut to form an assembly installed at the inlet end of the valve body to form the inlet check valve. The same valve body can be configured with check valves at the inlet and outlet, check valve only at the inlet, or check valve only at the outlet, depending on the requirements.

2. The integrated compact combined double gate valve with check valve according to claim 1, characterized in that: The valve cover, self-sealing ring, screw cap, transition plate, valve cover clamping nut, packing, packing sleeve, packing pressure plate, stud, nut, and preload screw constitute the pressure self-sealing between the valve cover and the valve body, and the sealing between the valve stem and the packing.

3. The integrated compact combined double gate valve with check valve according to claim 1, characterized in that: A transition plate is installed between the valve cover clamping nut and the top surface of the valve body. The support column is installed in the screw hole of the transition plate. The support plate is connected to the support column with screws. A guide block is installed on the valve stem. The hole on the guide block matches the support column to prevent the valve stem from rotating and to indicate the opening position of the valve stem. The support column connection hole on the support plate is offset from the gearbox seat connection hole. The gearbox seats of the bevel gear device and the spur gear drive device, as well as the bearing seats of the large handwheel operation, are all interchangeable and fixed on the support plate. The under-mounted valve stem nut seat has two planar bearings mounted on its shoulder. Bearing caps axially fix the valve stem nut seat and the two planar bearings within the gearbox housing. The coarse-pitch long thread on the valve stem nut is tightened into the valve stem nut seat, and the fine-pitch anti-loosening nut is tightened into the valve stem nut seat. The coarse-pitch valve stem nut and the fine-pitch anti-loosening nut are planarly engaged. The under-mounted valve stem nut seat can be either long-extended or short-extended. When two short-extended valve stem nut seats are used, they are used to install two bevel gear drives, two planetary spur gear drives, or one bevel gear drive and one spur gear drive. When operating with one bevel gear drive and one gearless drive using a large handwheel, the handwheel is mounted on the long-extended valve stem nut seat, ensuring the handwheel height exceeds the top of the bevel gear drive's protective cover, allowing for interference-free operation of the bevel gear drive and the large handwheel. The large bevel gear and the planetary carrier of the planetary gear in the bevel gear drive device have the same dimensions and position for connection with the short extended valve stem nut seat.

4. The integrated compact combined double gate valve with check valve according to claim 3, characterized in that: The connection method is two-end flanges or two-button welded ends, and the valve cover is bolted; the pneumatic and electric operating structure is installed on the support plate and its bracket.

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