Lightweight low-fat high-pressure gate valve

Abstract

According to the light-weight low-fat high-pressure gate valve, a more compact structural design is adopted, a valve seat supporting plate is removed, the wall thickness of flanges at the two ends of a valve body and the wall thickness of the side wall and the bottom wall of the middle of the valve body are optimally designed, and on the premise that the gate valve device is safe and reliable, the appearance is smaller, the weight is lighter, and more material resources are saved; less sealing grease needs to be injected in the later use and maintenance process of the gate valve device; the valve plate is provided with the flow guide hole, so that the switching torque of the gate valve is lighter.

Description

Technical Field

[0001] The invention relates to the technical field of oil / gas production gate valves, and in particular to a lightweight, low-fat, high-pressure gate valve. Background Art

[0002] Traditional oil / gas production gate valves usually adopt heavy structure design, which leads to large overall weight of the device and requires frequent grease injection to ensure the normal operation of the gate valve. However, this gate valve design has problems such as energy waste, difficult maintenance, and large grease injection requirements. Therefore, a solution for lightweight, low-fat, high-pressure gate valves is needed to improve the performance of gate valve equipment and reduce maintenance costs. Summary of the invention

[0003] In order to solve the defects of the prior art, the present invention provides a lightweight, low-fat, high-pressure gate valve, comprising: a valve body with flanges on the left and right ends respectively, a flow channel arranged in the valve body, placed horizontally in the left and right directions and passing through the flanges on the left and right ends, a middle hole arranged in the middle of the valve body, placed vertically and passed through by the flow channel, a vertical valve plate arranged in the middle hole and used to block the flow channel, a flow channel hole arranged in the lower part of the valve plate and passing through in the left and right directions, a lower guide hole arranged at the front or rear side of the valve plate and connecting the flow channel hole with the middle hole, a vertical threaded hole arranged at the top of the valve plate and for a valve stem to be inserted and threadedly connected, an upper guide hole arranged at the front or rear side of the valve plate and connecting the threaded hole with the middle hole, a pair of valve seats arranged in the middle hole and arranged on the left and right sides of the valve plate, a valve cover installed on the top of the valve body by fasteners, and a valve stem vertically passing through the valve cover and having a bottom end threadedly connected to the threaded hole of the valve plate.

[0004] Preferably, the lower guide hole and the upper guide hole are located on the same side of the valve plate.

[0005] Preferably, the cross section of the mesopore is elliptical.

[0006] Preferably, the center hole is formed by multiple round hole drilling and milling.

[0007] Preferably, it also includes: a pair of pocket holes respectively arranged on the left and right sides of the valve plate, both located at the junction of the middle hole and the flow channel, corresponding one to one with a pair of valve seats, and used for installing the corresponding valve seats, and a step arranged in the middle hole, located at the upper edge of the pair of pocket holes and protruding toward the valve plate.

[0008] Preferably, it also includes: an outer groove provided on the outer ring of the end surface of the valve seat and the valve body, an outer sealing ring of the valve seat installed in the outer groove, an inner groove provided on the inner ring of the end surface of the valve seat and the valve body, an inner sealing ring of the valve seat installed in the inner groove, and a wave spring installed in the inner groove and located on the inner side of the inner sealing ring of the valve seat.

[0009] Preferably, it also includes: a mounting hole provided at the top end of the valve body and used for mounting a fastener, and a valve cover sealing ring provided at the bottom of the valve cover.

[0010] Preferably, the fasteners include bolts and nuts.

[0011] Preferably, it also includes: a hand wheel arranged at the top end of the valve stem.

[0012] Preferably, under the premise of ensuring the structural strength of the valve body, the wall thickness of the flanges at both ends of the valve body and the wall thickness of the side walls and bottom wall in the middle of the valve body are reduced.

[0013] The advantages and beneficial effects of the present invention are: providing a lightweight, low-fat, high-pressure gate valve, which adopts a more compact structural design, removes the valve seat support plate, and optimizes the wall thickness of the flanges at both ends of the valve body and the side walls and bottom wall thickness of the middle part of the valve body. While ensuring the safety and reliability of the gate valve device, the valve has a smaller appearance, lighter weight, and saves more material resources. Less sealing grease needs to be injected during the later use and maintenance of the gate valve device; and the valve plate is provided with a guide hole, and the switching torque of the gate valve is lighter.

[0014] The present invention also has the following characteristics: The depth of the pocket hole of the present invention is optimized to ensure that the thickness of the valve seat is fully matched, so the valve seat support plate of the traditional gate valve device is removed.

[0015] The center hole cavity of the valve body of the present invention is designed with a step, so the volume of the center hole circular cavity of the present invention is smaller than that of the traditional gate valve device, and the structure is more compact, and less sealing grease needs to be injected during the later use and maintenance of the gate valve device.

[0016] The wall thickness of the flanges at both ends of the valve body, the wall thickness of the side walls in the middle of the valve body, and the wall thickness of the bottom wall in the middle of the valve body are optimized. Under the premise of ensuring the structural strength of the valve body, the wall thickness of the flanges at both ends of the valve body and the wall thickness of the side walls and bottom walls in the middle of the valve body are reduced. Therefore, the weight of the present invention is smaller than that of traditional gate valve devices and it saves more metal material resources.

[0017] The wave spring of the present invention gives a certain initial force to the valve seat. Under the action of the initial force and the flow channel pressure, the valve seat and the valve plate fit tightly to achieve metal-metal sealing. In the process of high-pressure oil / gas production, the gate valve device of the present invention is reliably sealed.

[0018] The valve plate of the present invention is provided with: a lower guide hole connecting the flow channel hole with the middle hole, and an upper guide hole connecting the threaded hole with the middle hole; during the gate valve switching operation, the lower guide hole guides the medium fluid in the flow channel hole into the middle hole cavity, and the upper guide hole quickly guides the medium fluid in the middle hole cavity into the threaded hole and acts on the bottom of the valve stem, thereby optimizing the force condition of the valve stem under the gate valve pressure condition, and achieving the purpose of reducing the gate valve switching torque. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 A schematic diagram of a lightweight, low-fat, high-pressure gate valve according to the present invention; Figure 2 for Figure 1 A partial enlarged view of the middle V section; Figure 3 for Figure 2 A partial enlarged view of the middle VI section; Figure 4 is a top view schematic diagram of the valve body; Figure 5 It is a front cross-sectional schematic diagram of the valve body; Figure 6 is a schematic diagram of a valve plate; Figure 7 Schematic diagram of valve plate and valve stem. DETAILED DESCRIPTION

[0020] The specific implementation of the present invention is further described below in conjunction with the accompanying drawings and embodiments. The following embodiments are only used to more clearly illustrate the technical solution of the present invention, and cannot be used to limit the protection scope of the present invention.

[0021] The technical solutions specifically implemented in the present invention are as follows: like Figures 1 to 7 As shown, a lightweight, low-fat, high-pressure gate valve comprises: a valve body 1 with flanges at both ends, a flow channel arranged in the valve body 1, lying horizontally in the left-right direction and penetrating the flanges at both ends, a middle hole 101 arranged in the middle of the valve body 1, vertically arranged and penetrated by the flow channel, a vertical valve plate 2 arranged in the middle hole 101 and used to block the flow channel, a flow channel hole 201 arranged in the lower part of the valve plate 2 and penetrating in the left-right direction, a lower guide hole 2011 opened at the front side or rear side of the valve plate 2 and connecting the flow channel hole 201 with the middle hole 101, a vertical threaded hole 202 arranged at the top of the valve plate 2 and for the valve stem 11 to be inserted and threadedly connected, an upper guide hole 2021 opened at the front side or rear side of the valve plate 2 and connecting the threaded hole 202 with the middle hole 101, a pair of valve seats 3 arranged in the middle hole 101 and arranged on the left and right sides of the valve plate 2, and two valve seats 3 arranged on the left and right sides of the valve plate 2 and both located at A pair of pocket holes 105 corresponding to the pair of valve seats 3 and used to install the corresponding valve seats 3, a step 103 provided in the middle hole 101, located on the upper edge of the pair of pocket holes 105 and protruding toward the valve plate 2, an outer groove provided on the outer ring of the end surface of the valve seat 3 and the valve body 1, a valve seat outer sealing ring 8 installed in the outer groove, an inner groove provided on the inner ring of the end surface of the valve seat 3 and the valve body 1, a valve seat inner sealing ring 9 installed in the inner groove, a wave spring 10 installed in the inner groove and located inside the valve seat inner sealing ring 9, a valve cover 4 installed at the top of the valve body 1 through a fastener, a mounting hole 102 provided at the top of the valve body 1 and used to install the fastener, a valve cover sealing ring 7 provided at the lower part of the valve cover 4, a valve stem 11 vertically penetrating the valve cover 4 and having its bottom end threadedly connected to the threaded hole 202 of the valve plate 2, and a handwheel 12 provided at the top of the valve stem 11; The cross section of the middle hole 101 is elliptical; the middle hole 101 is formed by multiple round hole drilling and milling; The lower guide hole 2011 and the upper guide hole 2021 are located on the same side of the valve plate 2; The fasteners include bolts 5 and nuts 6 .

[0022] The depth of the pocket hole 105 of the present invention is optimized to ensure that it fully matches the thickness of the valve seat 3, so the present invention removes the valve seat 3 support plate of the traditional gate valve device.

[0023] The center hole 101 of the valve body 1 of the present invention is designed with a step 103, so the volume of the circular cavity of the center hole 101 of the present invention is smaller than that of the traditional gate valve device, and the structure is more compact, so less sealing grease needs to be injected during the later use and maintenance of the gate valve device.

[0024] The flange wall thickness at both ends of the valve body 1, the side wall wall thickness in the middle of the valve body 1, and the bottom wall wall thickness in the middle of the valve body 1 are optimized. Under the premise of ensuring the structural strength of the valve body 1, the flange wall thickness 104 at both ends of the valve body 1 and the side wall and bottom wall thickness 106 in the middle of the valve body 1 are reduced. Therefore, the present invention is lighter than the traditional gate valve device and saves more metal material resources.

[0025] The wave spring 10 of the present invention applies a certain initial force to the valve seat 3. Under the action of the initial force and the flow channel pressure, the valve seat 3 and the valve plate 2 fit tightly to achieve metal-metal sealing. During high-pressure oil / gas production, the gate valve device of the present invention is reliably sealed.

[0026] The valve plate 2 of the present invention is provided with: a lower guide hole 2011 connecting the flow channel hole 201 with the middle hole 101, and an upper guide hole 2021 connecting the threaded hole 202 with the middle hole 101; during the operation of the gate valve switch, the lower guide hole 2011 guides the medium fluid in the flow channel hole 201 into the cavity of the middle hole 101, and the upper guide hole 2021 quickly guides the medium fluid in the cavity of the middle hole 101 into the threaded hole 202 and acts on the bottom of the valve stem 11, thereby optimizing the force condition of the valve stem 11 under the pressure of the gate valve, and achieving the purpose of reducing the gate valve switch torque.

[0027] When opening the gate valve, the hand wheel 12 is rotated counterclockwise to drive the valve stem 11 to rotate, thereby driving the gate plate to move upward, thereby achieving full opening of the valve; When closing the gate valve, the hand wheel 12 is rotated clockwise to drive the valve stem 11 to rotate, thereby driving the gate plate to move downward, thereby achieving complete closure of the valve.

[0028] The above is only a preferred embodiment of the present invention. It should be pointed out that for ordinary technicians in this technical field, several improvements and modifications can be made without departing from the technical principles of the present invention. These improvements and modifications should also be regarded as the scope of protection of the present invention.

Claims

1. A lightweight, low-fat, high-pressure gate valve, characterized in that: include: A valve body with flanges on the left and right ends respectively, a flow channel arranged in the valve body, placed horizontally along the left and right directions and passing through the flanges on the left and right ends, a middle hole arranged in the middle of the valve body, placed vertically and passed through by the flow channel, a vertical valve plate arranged in the middle hole and used to block the flow channel, a flow channel hole arranged at the lower part of the valve plate and passing through in the left and right directions, a lower guide hole arranged at the front or rear side of the valve plate and connecting the flow channel hole with the middle hole, a vertical threaded hole arranged at the top of the valve plate and for the valve stem to be inserted and threadedly connected, an upper guide hole arranged at the front or rear side of the valve plate and connecting the threaded hole with the middle hole, a pair of valve seats arranged in the middle hole and arranged on the left and right sides of the valve plate, a valve cover installed on the top of the valve body by fasteners, and a valve stem that vertically passes through the valve cover and has its bottom end threadedly connected to the threaded hole of the valve plate.

2. The lightweight, low-fat, high-pressure gate valve according to claim 1, characterized in that: The lower guide hole and the upper guide hole are located on the same side of the valve plate.

3. The lightweight, low-fat, high-pressure gate valve according to claim 1, characterized in that: The cross section of the mesopore is elliptical.

4. The lightweight, low-fat, high-pressure gate valve according to claim 3 is characterized in that: The middle hole is formed by drilling and milling multiple circular holes.

5. The lightweight, low-fat, high-pressure gate valve according to claim 1, characterized in that: Also includes: A pair of pocket holes are arranged on the left and right sides of the valve plate, both located at the junction of the central hole and the flow channel, corresponding to a pair of valve seats one by one, and used to install the corresponding valve seats, and a step is arranged in the central hole, located at the upper edge of the pair of pocket holes and protruding toward the valve plate.

6. The lightweight, low-fat, high-pressure gate valve according to claim 1, characterized in that: Also includes: An outer groove provided on the outer ring of the matching end faces of the valve seat and the valve body, an outer sealing ring of the valve seat installed in the outer groove, an inner groove provided on the inner ring of the matching end faces of the valve seat and the valve body, an inner sealing ring of the valve seat installed in the inner groove, and a wave spring installed in the inner groove and located on the inner side of the inner sealing ring of the valve seat.

7. The lightweight, low-fat, high-pressure gate valve according to claim 1, characterized in that: Also includes: A mounting hole is provided at the top of the valve body and is used to install a fastener, and a valve cover sealing ring is provided at the bottom of the valve cover.

8. The lightweight, low-fat, high-pressure gate valve according to claim 7, characterized in that: The fasteners include bolts and nuts.

9. The lightweight, low-fat, high-pressure gate valve according to claim 1, characterized in that: Also includes: A handwheel located at the top of the valve stem.

10. The lightweight, low-fat, high-pressure gate valve according to claim 1, characterized in that: Under the premise of ensuring the structural strength of the valve body, the wall thickness of the flanges at both ends of the valve body and the side wall and bottom wall in the middle of the valve body are reduced.

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