Sand prevention valve with good sealing performance

Abstract

The utility model relates to the technical field of valves, and discloses a sand prevention valve with good sealing performance, which comprises a valve body, flanges are fixedly mounted on the outer sides of the left end and the right end of the valve body, a filter plate is fixedly mounted in the valve body, a valve rod is rotatably mounted in the valve body, a cylindrical block is fixedly mounted at the top of the valve rod, and the cylindrical block is fixedly mounted in the valve body. A valve plate is fixedly installed on the outer side of the valve rod, and a sealing ring is fixedly installed in the valve body. According to the sand prevention valve with the good sealing performance, in order to improve the sealing performance of the valve body, a sealing assembly, a matched clamping block, a clamping groove and an N-shaped frame are arranged, a limiting block can be pulled upwards, when a rotary knob is rotated, a valve rod can be driven to rotate, opening and closing of the valve body can be controlled through a valve plate, and meanwhile through cooperation of a thin rod, a disc block, an attaching spring, a connecting base and a screw, the sealing performance is improved. And the limiting block can be better meshed with the limiting sleeve, so that the valve rod is not prone to shaking, and then the sealing performance of the valve body can be improved.

Description

Technical Field

[0001] The utility model relates to the technical field of valves, in particular to a sand-proof valve with good sealing performance. Background Art

[0002] Fracturing wellhead valves can be used to control the flow of various types of fluids such as air, water, various media, sand-containing mud, oil, etc. Fracturing wellhead valves are generally installed on the wellhead pipeline through flanges.

[0003] The sand prevention valve for wellhead fracturing in the prior art achieves precise control of fluid flow by closing the valve through the cooperation of the valve body, valve cover, valve stem and hand wheel. At the same time, through the cooperation of the sealing ring and the sealing gasket ring, the sand prevention valve can improve the overall sealing performance when in use to avoid leakage.

[0004] However, the internal structure of the current sand-proof valve is relatively simple. When the medium passes through the inside of the valve, it will cause slight vibration of the valve body, which will easily cause a gap between the valve stem and the valve body, resulting in poor sealing. In addition, the seal is simply performed through a sealing ring and a sealing ring. The seal and the valve stem are not tightly enough, which can easily lead to leakage risks. In view of this, we propose a sand-proof valve with good sealing performance. Utility Model Content

[0005] The utility model aims to provide a sand-proof valve with good sealing performance to solve the problems raised in the above-mentioned background technology.

[0006] To achieve the above-mentioned purpose, the utility model provides the following technical solutions: a sand-proof valve with good sealing performance, comprising a valve body, flanges are fixedly installed on the outer sides of the left and right ends of the valve body, a filter plate is fixedly installed inside the valve body, a valve stem is rotatably installed inside the valve body, a cylindrical block is fixedly installed on the top of the valve stem, a valve plate is fixedly installed on the outer side of the valve stem, a sealing ring is fixedly installed inside the valve body, the arc-shaped outer wall of the valve plate slides in contact with the arc-shaped inner wall of the sealing ring, a sealing assembly is arranged on the valve body, and the sealing assembly comprises:

[0007] A limit block, wherein the cylindrical block is sleeved with a limit block, the cylindrical block is fixedly mounted with a clamping block, the limit block is provided with a clamping slot, and the clamping block is slidably fitted in the clamping slot;

[0008] N-shaped frame, the top of the limit block is fixedly installed with the N-shaped frame, the outer side of the top of the N-shaped frame is fixedly installed with a knob, the top center of the cylindrical block is fixedly installed with a thin rod, the top of the thin rod is fixedly installed with a disc block, the outer side of the thin rod is sleeved with a tight spring, the top of the tight spring fits the bottom of the disc block, and the bottom of the tight spring fits the top of the N-shaped frame;

[0009] A connecting seat, the top of the valve body is fitted with a connecting seat, the top of the connecting seat is slidably fitted with the bottom of the cylindrical block, a screw is installed with a screw threaded inside the connecting seat, the screw thread is installed inside the top of the valve body, a limit sleeve is fixedly installed at the center of the top of the connecting seat, the centers of the circular cross-sections of the limit block and the limit sleeve are coaxial, the teeth of the limit block are matched with the tooth groove size of the limit sleeve, so that the limit block and the limit sleeve can mesh smoothly.

[0010] Preferably, the flanges are provided in two groups, and the valve body can be connected to an external pipeline by cooperating with the flanges.

[0011] Preferably, the clamping blocks and clamping slots are provided in multiple groups, so as to better drive the cylindrical block to rotate.

[0012] Preferably, the centers of the circular cross-sections of the cylindrical block, valve stem, limit block, knob, thin rod, disc block and limit sleeve are coaxial.

[0013] Preferably, an auxiliary component is provided inside the top end of the valve body, a sealing block is sleeved inside the top end of the valve body, the inner side of the sealing block fits the outer side of the valve stem, a small spring is fixedly installed inside the sealing block, and multiple groups of small springs are provided, thereby achieving a better sealing effect.

[0014] Preferably, an airbag is fixedly mounted on the top of the sealing block, the sealing block is connected to the inside of the airbag, the top of the airbag fits the bottom of the connecting seat, and multiple groups of airbags are provided, thereby achieving a better sealing effect.

[0015] Compared with the prior art, the utility model provides a sand-proof valve with good sealing performance, which has the following beneficial effects:

[0016] 1. In order to improve the sealing performance of the valve body, the sand-proof valve with good sealing performance is provided with a sealing component, which cooperates with a clamping block, a clamping groove and an N-shaped frame to pull up the limit block, so that when the knob is turned, the valve stem can be driven to rotate, so that the opening and closing of the valve body can be controlled through the valve plate. At the same time, with the thin rod, disc block, tight spring, connecting seat and screws, the limit block can better engage with the limit sleeve, so that the valve stem is not easy to shake, thereby improving the sealing performance of the valve body.

[0017] 2. In order to further improve the sealing performance of the valve body, the sand-proof valve with good sealing performance is provided with auxiliary components. First, after the valve stem is installed inside the valve body, the elastic potential energy of the small spring in the compression deformation state is used to make the sealing block better fit the outside of the valve stem, thereby improving the sealing effect. At the same time, after the connecting seat is installed on the top of the valve body, the air bag will be squeezed, causing the sealing block to expand slightly, so that the sealing block and the valve stem fit more closely, thereby further improving the sealing performance of the valve body. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] Figure 1 It is a schematic top view of the overall structure of the utility model;

[0019] Figure 2 This is a schematic diagram of a cross-sectional top view of a valve body of the utility model;

[0020] Figure 3 For this utility model Figure 2 A schematic diagram of the enlarged structure of the middle A area;

[0021] Figure 4 It is a schematic diagram of the explosion of a partial structural section of the utility model;

[0022] Figure 5 This is a schematic diagram of a cross-sectional bottom view of a valve body and a connecting seat of the utility model;

[0023] Figure 6 For this utility model Figure 5 Schematic diagram of the enlarged structure of the middle B area;

[0024] Figure 7 It is a cross-sectional schematic diagram of the sealing block of the utility model.

[0025] In the figure: 1. valve body; 2. flange; 3. filter plate; 4. cylindrical block; 5. valve stem; 6. valve plate; 7. sealing ring; 8. sealing assembly; 81. limit block; 82. clamping block; 83. clamping groove; 84. N-shaped frame; 85. knob; 86. thin rod; 87. disc block; 88. clamping spring; 89. connecting seat; 810. screw; 811. limit sleeve; 9. auxiliary assembly; 91. sealing block; 92. small spring; 93. air bag. DETAILED DESCRIPTION

[0026] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0027] See also Figure 1-7The utility model provides a technical solution: a sand-proof valve with good sealing performance, including a valve body 1, flanges 2 are fixedly installed on the outer sides of the left and right ends of the valve body 1, in addition, two groups of flanges 2 are provided, and the valve body can be connected to the external wellhead pipeline by matching the flanges 2, a filter plate 3 is fixedly installed inside the valve body 1, and filter holes are opened on the filter plate 3, a valve stem 5 is rotatably installed inside the valve body 1, a cylindrical block 4 is fixedly installed on the top of the valve stem 5, a valve plate 6 is fixedly installed on the outer side of the valve stem 5, a sealing ring 7 is fixedly installed inside the valve body 1, the sealing ring 7 is made of corrosion-resistant rubber material, and the sealing performance can be improved by matching the sealing ring 7, and the arc-shaped outer wall of the valve plate 6 slides and fits the arc-shaped inner wall of the sealing ring 7.

[0028] In one embodiment of the utility model, a sealing assembly 8 is provided on the valve body 1, and the sealing assembly 8 includes a limit block 81, a limit block 81 is sleeved on the outer side of the cylindrical block 4, a clamping block 82 is fixedly installed on the outer side of the cylindrical block 4, a clamping groove 83 is opened on the limit block 81, the clamping block 82 slides and fits inside the clamping groove 83, and an N-shaped frame 84 is fixedly installed on the top of the limit block 81. In addition, the clamping block 82 and the clamping groove 83 are provided with multiple groups, so as to better drive the cylindrical block 4 to rotate, and a knob 85 is fixedly installed on the outer side of the top of the N-shaped frame 84. A thin rod 86 is fixedly installed in the center. When the knob 85 is pulled up, the N-shaped frame 84 is driven to move synchronously in the same direction on the outside of the thin rod 86. At the same time, the clamping block 82 moves synchronously in the same direction inside the clamping groove 83, so that the limit block 81 can be pulled up. When the knob 85 is turned, the valve stem 5 can be driven to rotate synchronously, so that the opening and closing of the valve body can be controlled through the valve plate 6. A disc block 87 is fixedly installed on the top of the thin rod 86, and a tight spring 88 is sleeved on the outside of the thin rod 86. The top of the tight spring 88 fits the bottom of the disc block 87, and the bottom of the tight spring 88 fits the bottom of the disc block 87. The top of the valve body 1 is fitted with the top of the N-shaped frame 84, and the knob 85 is pulled up while the disc block 87 is used to compress the close spring 88. When the knob 85 is released, the close spring 88 is used to restore the elastic potential energy of the deformation, so that the limit block 81 is better engaged with the limit sleeve 811 (note that the close spring 88 is still in a compressed deformation state at this time), so that the valve stem 5 is not easy to shake, and then the sealing performance of the valve body can be improved. The top of the valve body 1 is fitted with a connecting seat 89, and the top of the connecting seat 89 slides and fits the bottom of the cylindrical block 4. The internal thread of the connecting seat 89 is equipped with a screw The screw 810 is threadedly installed inside the top of the valve body 1 to facilitate disassembly and assembly. A limit sleeve 811 is fixedly installed at the top center of the connecting seat 89. The centers of the circular cross-sections of the limit block 81 and the limit sleeve 811 are coaxial. The teeth of the limit block 81 are adapted to the tooth grooves of the limit sleeve 811, so that the limit block 81 and the limit sleeve 811 can mesh smoothly. In addition, the centers of the circular cross-sections of the cylindrical block 4, the valve stem 5, the limit block 81, the knob 85, the thin rod 86, the disc block 87 and the limit sleeve 811 are coaxial.

[0029] In one embodiment of the utility model, an auxiliary component 9 is provided inside the top of the valve body 1, and a sealing block 91 is sleeved inside the top of the valve body 1. The sealing block 91 is made of corrosion-resistant rubber material. The inner side of the sealing block 91 fits the outer side of the valve stem 5. A small spring 92 is fixedly installed inside the sealing block 91. Seven groups of small springs 92 are provided, and the seven groups of small springs 92 are arranged in a circular array with equal spacing around the center of the circular cross section of the sealing block 91 as the center of the array, so as to achieve a better sealing effect. In addition, after the valve stem 5 is installed inside the valve body 1, the elastic potential energy of the small spring 92 in the compressed deformation state is utilized to make the sealing block 9 1 can better fit the outer side of the valve stem 5, so as to achieve a better sealing effect. In addition, an airbag 93 is fixedly installed on the top of the sealing block 91. The sealing block 91 is connected to the inside of the airbag 93. The top of the airbag 93 fits the bottom of the connecting seat 89. When the airbag 93 is not squeezed and deformed, the top of the airbag 93 is located higher than the top of the valve body 1. At the same time, after the connecting seat 89 is installed on the top of the valve body 1, the airbag 93 will be squeezed, so that the sealing block 91 is slightly expanded, so that the sealing block 91 and the valve stem 5 fit more closely, and then the sealing of the valve body can be further improved. Two groups of airbags 93 are provided, so as to achieve a better sealing effect.

[0030] Working principle: When the knob 85 is pulled upward, the N-shaped frame 84 is driven to move synchronously in the same direction outside the thin rod 86, and the clamping block 82 is synchronously moved in the same direction inside the clamping groove 83, so that the limit block 81 can be pulled upward. When the knob 85 is turned, the valve stem 5 can be driven to rotate synchronously, so that the opening and closing of the valve body can be controlled through the valve plate 6. When the knob 85 is pulled up, the disc block 87 is cooperated to compress the close spring 88. When the knob 85 is released, the close spring 88 is used to restore the elastic potential energy of the deformation, so that the limit block 81 can better engage the limit sleeve 811 ( Note that the spring 88 is still in a compressed deformation state at this time), so the valve stem 5 is not easy to shake, which can improve the sealing performance of the valve body. In addition, after the valve stem 5 is installed inside the valve body 1, the elastic potential energy of the small spring 92 in the compressed deformation state is used to make the sealing block 91 better fit the outer side of the valve stem 5, so as to achieve a better sealing effect. At the same time, after the connecting seat 89 is installed on the top of the valve body 1, the airbag 93 will be squeezed, so that the sealing block 91 will expand slightly, so that the sealing block 91 and the valve stem 5 fit more closely, which can further improve the sealing performance of the valve body.

[0031] The above generally describes the present invention in detail, but it is obvious to a person skilled in the art that some modifications or improvements can be made to the present invention. Therefore, modifications or improvements that do not deviate from the spirit of the present invention are within the scope of protection of the present invention.

Claims

1. A sand-proof valve with good sealing performance, comprising a valve body (1), flanges (2) are fixedly installed on the outer sides of the left and right ends of the valve body (1), a filter plate (3) is fixedly installed inside the valve body (1), a valve stem (5) is rotatably installed inside the valve body (1), a cylindrical block (4) is fixedly installed on the top of the valve stem (5), a valve plate (6) is fixedly installed on the outer side of the valve stem (5), a sealing ring (7) is fixedly installed inside the valve body (1), and the arc-shaped outer wall of the valve plate (6) is slidably fitted with the arc-shaped inner wall of the sealing ring (7), characterized in that: The valve body (1) is provided with a sealing assembly (8), and the sealing assembly (8) comprises: A limit block (81), wherein the limit block (81) is sleeved on the outer side of the cylindrical block (4), a clamping block (82) is fixedly installed on the outer side of the cylindrical block (4), a clamping groove (83) is formed on the limit block (81), and the clamping block (82) is slidably fitted inside the clamping groove (83); An N-shaped frame (84), the top of the limit block (81) is fixedly mounted with the N-shaped frame (84), the top outer side of the N-shaped frame (84) is fixedly mounted with a knob (85), the top center of the cylindrical block (4) is fixedly mounted with a thin rod (86), the top of the thin rod (86) is fixedly mounted with a disc block (87), the outer side of the thin rod (86) is sleeved with a close-fitting spring (88), the top of the close-fitting spring (88) is in contact with the bottom of the disc block (87), and the bottom of the close-fitting spring (88) is in contact with the top of the N-shaped frame (84); A connecting seat (89), the top of the valve body (1) is fitted with the connecting seat (89), the top of the connecting seat (89) is slidably fitted with the bottom of the cylindrical block (4), the internal thread of the connecting seat (89) is threadedly installed with a screw (810), the screw (810) is threadedly installed inside the top of the valve body (1), and a limiting sleeve (811) is fixedly installed at the center of the top of the connecting seat (89), the circular cross-section centers of the limiting block (81) and the limiting sleeve (811) are coaxial, and the teeth of the limiting block (81) are adapted to the tooth groove size of the limiting sleeve (811).

2. A sand-proof valve with good sealing performance according to claim 1, characterized in that: The flanges (2) are provided in two groups.

3. A sand-proof valve with good sealing performance according to claim 1, characterized in that: The card blocks (82) and card slots (83) are provided in multiple groups.

4. The sand-proof valve with good sealing performance according to claim 1, characterized in that: The centers of the circular cross-sections of the cylindrical block (4), the valve stem (5), the limiting block (81), the knob (85), the thin rod (86), the disc block (87) and the limiting sleeve (811) are coaxial.

5. The sand-proof valve with good sealing performance according to claim 1, characterized in that: An auxiliary component (9) is arranged inside the top end of the valve body (1), and a sealing block (91) is sleeved inside the top end of the valve body (1). The inner side of the sealing block (91) fits the outer side of the valve stem (5). A small spring (92) is fixedly installed inside the sealing block (91), and a plurality of groups of small springs (92) are arranged.

6. A sand-proof valve with good sealing performance according to claim 5, characterized in that: An airbag (93) is fixedly mounted on the top of the sealing block (91); the sealing block (91) is connected to the inside of the airbag (93); the top of the airbag (93) is in contact with the bottom of the connecting seat (89); and a plurality of airbags (93) are provided.

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