Guided tank bottom valve

Abstract

The utility model relates to a guide type tank bottom valve belongs to valve technical field, this guide type tank bottom valve includes tray, guide cylinder, sealing washer and lifting device, and the coaxial fixed in the bottom of guide cylinder of tray, and the guide cylinder is inserted in the pipe cylinder, and a plurality of side open windows are equipped on the guide cylinder, and the sealing washer is covered in the guide cylinder outside and is located between tray and the bottom wall of pipe cylinder, and the bottom of lifting device is fixed on tray, and lifting device is used for lifting tray to close or open pipe cylinder, adopts this structure, and when using, lifting tray through lifting device, makes sealing washer be tightly pressed in tightly by tray and pipe cylinder end face, thereby seals pipe cylinder, and the guide direction effect of guide cylinder to tray is played in the lifting process, makes tray keep vertical lifting, avoids the uneven force of sealing washer, the sealing is not strict because of tray skew, and the accident of slurry mixing is caused.

Description

Technical Field

[0001] This utility model belongs to the field of valve technology, and specifically relates to a guide-type tank bottom valve. Background Technology

[0002] Tank bottom valves are a common type of valve used in circulating tanks and storage tanks at drilling sites. The structure of a conventional tank bottom valve is as follows: Figure 1 As shown, a rubber sheet is laid on the tray, and a pressure plate is placed on the rubber sheet. Bolts pass through the tray, rubber sheet, and pressure plate and are fixed together. Turning the handwheel counterclockwise moves the lifting rod to move the tray upward. When the rubber sheet contacts the bottom tube of the tank, it seals the bottom tube from the mud inside the tank. Turning the handwheel clockwise moves the lifting rod to move the tray downward, separating the rubber sheet from the bottom tube of the tank and connecting the bottom tube of the tank with the mud channel.

[0003] However, if the handwheel is tightened too much during use, the rubber can be bitten or sheared by the pipe, causing the bottom valve of the tank to not close properly. Due to the mixing effect of the mud, the tray may not fit well with the pipe, and the tray may tilt and tighten, causing the bottom valve of the tank to not close properly, resulting in mud crossing between tanks, or even serious mud mixing accidents.

[0004] Therefore, a guide-type tank bottom valve with a long service life and better sealing effect is urgently needed. Utility Model Content

[0005] This utility model provides a guide-type tank bottom valve to solve the technical problems of poor sealing and easy slurry mixing in ordinary tank bottom valves in the prior art.

[0006] This utility model is achieved through the following technical solution: a guide-type tank bottom valve, including a tray, a guide cylinder, a sealing ring, and a lifting device. The tray is coaxially fixed to the bottom end of the guide cylinder, the guide cylinder is inserted into the tube, and the guide cylinder is provided with multiple side windows. The sealing ring is sleeved outside the guide cylinder and located between the bottom wall of the tray and the tube. The bottom end of the lifting device is fixed on the tray, and the lifting device is used to raise and lower the tray to close or open the tube.

[0007] To better realize this utility model, further optimizations are made to the above structure. The side window is a long strip window, which is arranged along the length direction of the guide tube, and multiple side windows are evenly arranged along the circumference of the guide tube.

[0008] To better realize this utility model, the above structure is further optimized by including an annular baffle. The annular baffle is coaxially fixed on the tray and is arranged around the outside of the guide cylinder. An annular groove for insertion with the tube is formed between the annular baffle and the guide cylinder. The sealing ring is embedded in the annular groove.

[0009] To better implement the present utility model, further optimization is made on the above structure. The lifting device includes a handwheel mechanism, a lifting rod and a shift fork. The lifting rod is connected between the handwheel mechanism and the shift fork. The shift fork is detachably fixed on the tray. The handwheel mechanism drives the tray to move vertically up and down via the lifting rod and the shift fork.

[0010] To better implement the present utility model, further optimization is made on the above structure. The shift fork is a "door"-shaped structural member formed by connecting a cross rod and two vertical rods. The lifting rod is fixedly connected to the middle part of the cross rod. Two lugs are symmetrically arranged on the edge of the tray, and the bottom ends of the two vertical rods are detachably fixed on the two lugs respectively.

[0011] To better implement the present utility model, further optimization is made on the above structure. The lug is provided with a threaded hole, the bottom of the vertical rod is provided with an external thread, the vertical rod is screwed onto the lug through the cooperation of the external thread and the threaded hole, and the end of the vertical rod that passes downward through the threaded hole is screwed with a fixing nut.

[0012] To better implement the present utility model, further optimization is made on the above structure, which further includes guide sleeves. The two guide sleeves are symmetrically fixed on both sides of the cylinder, the sleeve hole of the guide sleeve is vertically aligned with the threaded hole, and the vertical rod is movably inserted into the sleeve hole of the guide sleeve.

[0013] Compared with the prior art, the present utility model has the following beneficial effects: The guided tank bottom valve provided by the present utility model includes a tray, a guide cylinder, a sealing ring and a lifting device. The tray is coaxially fixed at the bottom end of the guide cylinder, the guide cylinder is inserted into the cylinder, the guide cylinder is provided with a plurality of side windows, the sealing ring is sleeved outside the guide cylinder and located between the tray and the bottom wall of the cylinder, and the bottom end of the lifting device is fixed on the tray, the lifting device is used to lift and lower the tray to close or open the cylinder. With this structure, when in use, the tray is lifted by the lifting device, so that the sealing ring is tightly pressed by the tray and the end face of the cylinder, thereby sealing the cylinder. During the lifting process, the guide cylinder plays a role in guiding the lifting direction of the tray, so that the tray keeps moving vertically up and down, avoiding the slurry channeling and mixing accidents caused by uneven force on the sealing ring and poor sealing due to the skew of the tray, which makes the present utility model more practical. Brief Description of the Drawings

[0014] In order to more clearly illustrate the technical solutions in the embodiments of the present utility model or the prior art, the drawings required in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the present utility model, and for those of ordinary skill in the art, other drawings can also be obtained according to these drawings without any creative effort.

[0015] Figure 1This is a perspective view of the guide-type tank bottom valve in this utility model; Figure 2 It is a half-section view of the pallet; Figure 3 This is a schematic diagram of the sealing tube of a guide-type tank bottom valve; Figure 4 This is a schematic diagram of the guide-type bottom valve opening the tube.

[0016] In the picture: 1-Tray; 2-Guide cylinder; 3-Sealing ring; 4-Tube cylinder; 5-Side window; 6-Annular baffle; 7-Annular groove; 8-Handwheel mechanism; 9-Lifting rod; 10-Shift fork; 11-Horizontal bar; 12-Vertical bar; 13-Lug; 14-Fixing nut; 15-Guide sleeve. Detailed Implementation

[0017] To make the objectives, technical solutions, and advantages of this utility model clearer, the technical solutions of this utility model will be described in detail below. Obviously, the described embodiments are only a part of the embodiments of this utility model, and not all of them. Based on the embodiments of this utility model, all other implementation methods obtained by those skilled in the art without creative effort are within the scope of protection of this utility model.

[0018] In the description of this utility model, it should be noted that, unless otherwise stated, "a plurality of" means two or more; the terms "upper," "lower," "left," "right," "inner," "outer," "front end," "rear end," "head," "tail," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first," "second," "third," etc., are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0019] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0020] Example 1: In this embodiment, a guide-type tank bottom valve, such as... Figures 1 to 4As shown, the system includes a tray 1, a guide cylinder 2, a sealing ring 3, and a lifting device. Specifically, the tray 1 is coaxially fixed to the bottom end of the guide cylinder 2. The guide cylinder 2 is inserted into the tube 4 with a clearance fit. The tray 1 is used to close or open the tube 4. The guide cylinder 2 is provided with multiple side windows 5. The side windows 5 are used to quickly form a mud flow channel between the mud in the tank and the tube 4 after the tube 4 is opened, so that the mud can pass through the guide cylinder 2 and enter the tube 4 immediately without having to completely pull the guide cylinder 2 out of the tube 4. The sealing ring 3 is sleeved on the outside of the guide cylinder 2 and is located between the bottom wall of the tray 1 and the tube 4. The bottom end of the lifting device is fixed to the tray 1. The lifting device is used to raise and lower the tray 1 to close or open the tube 4.

[0021] With this structure, the pallet 1 is lifted by the lifting device during use, so that the sealing ring 3 is tightly pressed by the pallet 1 and the end face of the tube 4, thereby sealing the tube 4. During the lifting process, the guide cylinder 2 guides the lifting direction of the pallet 1, keeping the pallet 1 vertically lifted and lowered. This avoids uneven force on the sealing ring 3 and poor sealing caused by the tilting of the pallet 1, which could lead to slurry mixing accidents. This makes the utility model more practical.

[0022] In this embodiment, as Figure 2 and Figure 4 As shown, the side window 5 is a long strip-shaped window. The side window 5 is arranged along the length of the guide cylinder 2. Multiple side windows 5 are evenly arranged along the circumference of the guide cylinder 2. When the tray 1 is lowered by the lifting device, the guide cylinder 2 is lowered together. The sealing effect of the sealing ring 3 fails first. Then, the bottom of the side window 5 extends out of the pipe 4, so that the inside of the pipe 4 is connected with the external mud. The external mud enters the pipe 4 through the side window 5 and the guide cylinder 2. As the tray 1 is lowered, the size of the side window 5 extending out of the pipe 4 gradually increases, thereby controlling and adjusting the flow rate of mud entering the pipe 4.

[0023] In this embodiment, as Figure 2 As shown, it also includes an annular baffle 6, which is coaxially fixed on the tray 1. The annular baffle 6 is arranged around the outside of the guide cylinder 2, and an annular groove 7 is formed between the annular baffle 6 and the guide cylinder 2 for insertion into the tube 4. The sealing ring 3 is embedded in the annular groove 7. When the tray 1 closes the tube 4, the bottom end of the tube 4 is completely inserted into the annular groove 7 and tightly abuts against the sealing ring 3. The sealing ring 3 is deformed by compression, thereby filling the gap of the annular groove 7, resulting in higher sealing performance. Since the bottom end of the tube 4 is inserted into the annular groove 7 and wrapped by the deformed sealing ring 3, it can effectively prevent it from being eroded by mud and causing structural breakage.

[0024] As a specific implementation of this embodiment, as Figure 1 and Figure 3 shown, the above lifting device comprises a handwheel mechanism 8, a lifting rod 9 and a fork 10. The above lifting rod 9 is connected between the above handwheel mechanism 8 and the fork 10. The above fork 10 is detachably fixed on the above tray 1. The above handwheel mechanism 8 drives the above tray 1 to move vertically up and down through the above lifting rod 9 and the fork 10, so as to achieve the purpose of lifting the above tray 1 to close or open the tube 4. Specifically, the above fork is a "∩"-shaped structural member formed by connecting a cross rod 11 and two vertical rods 12. The above lifting rod 9 is fixedly connected to the middle part of the cross rod 11. Two lugs 13 are symmetrically arranged on the edge of the above tray 1. The bottom ends of the two above vertical rods 12 are detachably fixed on the two above lugs 13. The two above vertical rods 12 are respectively located on both sides of the tube 4, and under the drive of the above handwheel mechanism 8, drive the above tray 1 to lift along the vertical direction.

[0025] It is worth noting that the above handwheel mechanism 8 is a prior art, which is widely used in the valve field. When the handwheel is rotated, the screw rod will be driven to rotate synchronously, while the nut is fixed on the lifting component and cannot rotate. The rotation of the screw rod forces the nut and the lifting component to move linearly along the axis direction of the screw rod through thread engagement, so as to realize ascending or descending. The lifting component is the above lifting rod 9, and the structure and principle thereof will not be repeated here.

[0026] Further, as Figure 1 and Figure 2 shown, the above lug 13 is provided with a threaded hole, the bottom of the above vertical rod 12 is provided with an external thread, the above vertical rod 12 is screwed on the above lug 13 through the cooperation of the external thread and the threaded hole, the end of the above vertical rod 12 passing downward through the above threaded hole is screwed with a fixing nut 14, so as to fix the above vertical rod 12 on the above lug 13, and the transmission failure fault will not occur. The top end of the above vertical rod 12 is detachably connected with the above cross rod 11 by screws. During installation, the above vertical rod 12 is firstly screwed and fixed on the above lug 13, then the above cross rod 11 is connected to the tops of the two above vertical rods 12 and fixed by screws. Certainly, the above cross rod 11 and the vertical rod 12 can also be of an integrated structure, in which case the above vertical rod 12 is non-detachably fixed on the above lug 13 by welding.

[0027] As an optimization, as Figure 3 and Figure 4As shown, it also includes guide sleeves 15. Two guide sleeves 15 are symmetrically fixed on both sides of the tube 4. The sleeve holes of the guide sleeves 15 are vertically aligned with the screw holes. The vertical rod 12 is movably inserted into the sleeve holes of the guide sleeves 15. The guide sleeves 15 are used to constrain the position of the fork and the tray 1 in the circumferential direction, so that the tray 1 cannot rotate in the circumferential direction, and ensure that the tray 1 can be stably raised and lowered vertically, and is not prone to tilting or tilting, thereby ensuring the sealing performance of the bottom valve.

[0028] The above description is merely a specific embodiment of this utility model, but the protection scope of this utility model is not limited thereto. Any variations or substitutions that can be easily conceived by those skilled in the art within the technical scope disclosed in this utility model should be included within the protection scope of this utility model. Therefore, the protection scope of this utility model should be determined by the protection scope of the claims.

Claims

1. A guide-type tank bottom valve, characterized in that: Comprising a tray (1), a guide cylinder (2), a sealing ring (3) and a lifting device, the tray (1) is coaxially fixed at the bottom end of the guide cylinder (2), the guide cylinder (2) is inserted into a tube (4), the guide cylinder (2) is provided with a plurality of side windows (5), the sealing ring (3) is sleeved outside the guide cylinder (2) and located between the tray (1) and the bottom wall of the tube (4), the bottom end of the lifting device is fixed on the tray (1), and the lifting device is used for lifting and lowering the tray (1) to close or open the tube (4).

2. The guide-type tank bottom valve according to claim 1, characterized in that: The side windows (5) are elongated windows, the side windows (5) are arranged along the length direction of the guide cylinder (2), and the plurality of side windows (5) are evenly arranged along the circumferential direction of the guide cylinder (2).

3. A guide-type tank bottom valve according to claim 1, characterized in that: Further comprising an annular baffle (6), the annular baffle (6) is coaxially fixed on the tray (1), the annular baffle (6) is arranged around the outside of the guide cylinder (2), an annular groove (7) for mating insertion with the tube (4) is formed between the annular baffle (6) and the guide cylinder (2), and the sealing ring (3) is embedded in the annular groove (7).

4. A guide-type tank bottom valve according to claim 1, characterized in that: The lifting device comprises a handwheel mechanism (8), a lifting rod (9) and a shift fork (10), the lifting rod (9) is connected between the handwheel mechanism (8) and the shift fork (10), the shift fork (10) is detachably fixed on the tray (1), and the handwheel mechanism (8) drives the tray (1) to vertically lift and lower via the lifting rod (9) and the shift fork (10).

5. A guide-type tank bottom valve according to claim 4, characterized in that: The shift fork (10) is a "door"-shaped structural member formed by connecting a cross rod (11) and two vertical rods (12), the lifting rod (9) is fixedly connected with the middle part of the cross rod (11), two lugs (13) are symmetrically arranged at the edge of the tray (1), and the bottom ends of the two vertical rods (12) are detachably fixed on the two lugs (13).

6. A guide-type tank bottom valve according to claim 5, characterized in that: The lug (13) is provided with a threaded hole, the bottom of the vertical rod (12) is provided with an external thread, the vertical rod (12) is screwed on the lug (13) through the cooperation of the external thread and the threaded hole, and the end of the vertical rod (12) passing downward through the threaded hole is screwed with a fixing nut (14).

7. A guide-type tank bottom valve according to claim 6, characterized in that: Further comprising two guide sleeves (15), the two guide sleeves (15) are symmetrically fixed on both sides of the tube (4), the sleeve holes of the guide sleeves (15) are vertically aligned with the threaded holes, and the vertical rods (12) are movably inserted through the sleeve holes of the guide sleeves (15).

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