Top-operated tank box valve for easy-to-crystallize medium

Abstract

The utility model discloses a tank box valve for top operation of a medium easy to crystallize. The tank box valve comprises an upper base and a lower base, the upper base is installed at the top of a tank box, an upper valve rod extending into an inner cavity of the tank box penetrates through the upper base, the upper base is provided with a driving mechanism for driving the upper valve rod to move up and down, a screw is arranged at the bottom of the upper valve rod, two nuts are arranged on each of the two sides of the screw, and the upper valve rod and the lower valve rod are connected through the driving mechanism. A pull rod connected to the outer side of the screw in a sleeving mode is arranged between the two nuts, the lower base is installed at the bottom of the tank box and provided with a discharge port communicated with an inner cavity of the tank box, a lower valve rod is arranged above the discharge port, a valve used for blocking the discharge port is arranged at the bottom of the lower valve rod, and a plug pin connected with the pull rod in a sleeving mode is arranged at the top of the lower valve rod. The pull rod is provided with an oblong hole which slides relative to the bolt. According to the utility model, the problems of difficulty in installation and even incapability of installation in the prior art are solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to valve technical field, especially a kind of tank valve for top operation of easy crystallization medium. BACKGROUND

[0002] The easy crystallization medium valve used by tank at present stage, mostly bottom valve of opening, once medium leaks, all are crystallization medium around valve, cannot be close to maintenance.For solving above problem, the production and use factory of tank container attempts to set a kind of valve in the tank on the top of easy crystallization medium transport tank, tank bottom is unloaded, thus it is needed to open the through hole for installing the valve on the upper and lower sides of tank. However, the coaxiality requirement of upper and lower through holes is very high, it is difficult to guarantee in actual construction process, in addition to the manufacturing error of valve parts itself, leading to valve installation difficulty, even not installed. SUMMARY

[0003] In view of the deficiency of prior art, the utility model aims at providing a kind of tank valve for top operation of easy crystallization medium, which is convenient to install.

[0004] To achieve the above object, the utility model discloses a kind of tank valve for top operation of easy crystallization medium, which adopts the technical scheme that:

[0005] A kind of tank valve for top operation of easy crystallization medium, including upper base and lower base, upper base is installed on the top of tank, upper base is penetrated with upper valve stem that extends into the cavity of tank, upper base is provided with driving mechanism for driving upper valve stem to move up and down, the bottom of upper valve stem is provided with screw rod, two nuts are arranged on the two sides of screw rod, two nuts are provided with pull rod that is sleeved on the outside of screw rod, lower base is installed on the bottom of tank, lower base is provided with discharge opening that is communicated with the cavity of tank, the upper of discharge opening is provided with lower valve stem, the bottom of lower valve stem is provided with valve for plugging discharge opening, the top of lower valve stem is provided with bolt that is sleeved with pull rod, pull rod is provided with long circular hole that is slid with bolt.

[0006] Preferably, the driving mechanism is an oil cylinder, and the piston rod of the oil cylinder is fixedly connected with the top of the upper valve stem.

[0007] Preferably, an upper guide sleeve is sleeved on the outside of the upper valve stem, and the upper guide sleeve is fixedly connected with the upper base.

[0008] Preferably, flange gaskets are sleeved on the outside of the upper valve stem on the two sides of the upper guide sleeve.

[0009] Preferably, a lower guide sleeve is sleeved on the outside of the lower valve stem, and the lower guide sleeve is fixedly connected with the lower base.

[0010] Preferably, the valve comprises a sealing gasket base fixed to the bottom of the lower valve stem, the bottom of the sealing gasket base is provided with a sealing gasket, the bottom of the sealing gasket is provided with a pressing plate, and the pressing plate is connected with the sealing gasket base by bolts to fix the sealing gasket on the sealing gasket base.

[0011] Compared with the prior art, the utility model has the following advantages:

[0012] During installation, according to the deviation between the upper valve stem and the lower valve stem, the position of the nut and the corresponding pull rod on the screw rod is adjusted to ensure that the bolt at the top of the lower valve stem can be inserted into the long circular hole, when the upper valve stem moves upward, the pull rod pulls the lower valve stem to move upward after moving upward for a distance, and the valve is opened; when the lower valve stem moves downward for a distance and is attached to the lower valve stem, the lower valve stem is pushed to move downward, and the valve is closed. Therefore, the through hole on the upper and lower sides of the tank can have a certain positional deviation, and the manufacturing errors of various parts can be compensated, so that installation is facilitated, and installation failure does not occur. BRIEF DESCRIPTION OF DRAWINGS

[0013] Figure 1 is a structural schematic view of the tank valve for top operation of the easily crystallized medium of the utility model.

[0014] Figure 2 is Figure 1 a partial enlarged view.

[0015] Figure 3 is a sectional view of the tank valve for top operation of the easily crystallized medium of the utility model.

[0016] Among them, 1 upper base, 11 upper guide sleeve, 2 lower base, 21 discharge port, 22 lower guide sleeve, 3 upper valve stem, 31 screw rod, 32 nut, 4 driving mechanism, 5 flange sleeve, 6 flange sealing gasket, 7 pull rod, 71 long circular hole, 8 lower valve stem, 81 bolt, 9 valve, 91 sealing gasket base, 92 sealing gasket, 93 pressing plate. DETAILED DESCRIPTION

[0017] The utility model is further illustrated below in combination with the drawings and specific embodiments, and it should be understood that these embodiments are only used to illustrate the utility model and are not used to limit the scope of the utility model, and after reading the utility model, various equivalent forms of the utility model modified by those skilled in the art all fall within the scope defined by the claims attached to the present application.

[0018] As Figures 1 to 3As shown, a tank valve for top operation of easily crystallized medium includes an upper base 1 and a lower base 2, the upper base is installed on the top of the tank, the upper base penetrates into the upper valve rod 3 of the tank cavity, the top of the upper base is installed with the driving mechanism 4 for driving the upper valve rod to move up and down, the driving mechanism is an oil cylinder, the piston rod of the oil cylinder and the top of the upper valve rod are both screwed with the flange sleeve 5, the two flange sleeves are connected by bolts to connect the piston rod and the upper valve rod as a whole, the outer side of the upper valve rod is sleeved with the upper guide sleeve 11, the upper guide sleeve is fixedly connected with the upper base, the upper guide sleeve can ensure the stability of the movement of the upper valve rod, the upper and lower sides of the upper guide sleeve are arranged with the flange sealing gasket 6 sleeved on the outer side of the upper valve rod, the upper flange sealing gasket is fixedly connected with the upper base, and the lower flange sealing gasket is fixedly connected with the upper guide sleeve, the two flange sealing gaskets ensure the sealing of the upper base, so that the medium in the tank does not leak at the upper base, the bottom of the upper valve rod is installed with the screw rod 31, the two sides of the screw rod are each screwed with two nuts 32, the pull rod 7 sleeved on the outer side of the screw rod is installed between the two nuts, the lower base is installed on the bottom of the tank, the lower base is provided with the discharge port 21 communicated with the tank cavity, the discharge port is in the shape of a trumpet mouth for convenient discharge, the lower valve rod 8 is installed above the discharge port, the valve 9 for plugging the discharge port is installed at the bottom of the lower valve rod, the valve includes the sealing gasket base 91 fixedly connected with the bottom of the lower valve rod, the bottom of the sealing gasket base is provided with the sealing gasket 92, the bottom of the sealing gasket is provided with the pressing plate 93, the pressing plate is connected with the sealing gasket base by bolts to fix the sealing gasket on the sealing gasket base, the top of the lower valve rod is installed with the latch 81 sleeved with the pull rod, the pull rod is provided with the oblong hole 71 relatively sliding with the latch, the outer side of the lower valve rod is sleeved with the lower guide sleeve 22, and the lower guide sleeve is fixedly connected with the lower base, so that the lower guide sleeve can ensure the stability of the movement of the lower valve rod.

[0019] The specific working process and principle of the utility model are as follows: when the valve is opened, the piston rod drives the upper valve rod to move upwards, the upper valve rod drives the pull rod to move upwards, the pull rod can rotate around the screw rod under the action of the latch, until the latch relatively slides to the bottom of the oblong hole, the pull rod drives the lower valve rod to move upwards, and the valve is away from the discharge port; when the valve is closed, the piston rod drives the upper valve rod to move downwards, the upper valve rod drives the pull rod to move downwards, and the latch relatively slides to the middle of the oblong hole, at this moment, the upper valve rod is combined with the lower valve rod, and the lower valve rod is pressed to move downwards, and the valve plugs the discharge port.

Claims

1. A tank valve for top operated tanks of easily crystallizing media, characterized in that: The utility model relates to a tank valve, which comprises an upper base and a lower base, the upper base is installed on the top of the tank, the upper base is penetrated by an upper valve rod which extends into the inner cavity of the tank, the upper base is provided with a driving mechanism for driving the upper valve rod to move up and down, the bottom of the upper valve rod is provided with a screw rod, two nuts are arranged on the two sides of the screw rod respectively, a pull rod is arranged between the two nuts and sleeved on the outer side of the screw rod, the lower base is installed on the bottom of the tank, the lower base is provided with a discharge port which communicates with the inner cavity of the tank, a lower valve rod is arranged above the discharge port, the bottom of the lower valve rod is provided with a valve for sealing the discharge port, the top of the lower valve rod is provided with a bolt which is sleeved with the pull rod, and the pull rod is provided with an oblong hole which is opposite to the bolt and can slide.

2. A tank valve for top operation of a crystallizable medium according to claim 1, characterized in that: The driving mechanism is an oil cylinder, and the piston rod of the oil cylinder is fixedly connected with the top of the upper valve rod.

3. A tank valve for top operation of a crystallizable medium according to claim 2, characterized in that: An upper guide sleeve is sleeved on the outer side of the upper valve rod, and the upper guide sleeve is fixedly connected with the upper base.

4. A tank valve for top operation of a crystallizable medium according to claim 3, characterized in that: Flange sealing gaskets are arranged on the two sides of the upper guide sleeve and sleeved on the outer side of the upper valve rod.

5. The tank valve for top operation of a crystallizable medium according to claim 1, characterized in that: A lower guide sleeve is sleeved on the outer side of the lower valve rod, and the lower guide sleeve is fixedly connected with the lower base.

6. The tank valve for top operation of a crystallizable medium according to claim 1, characterized in that: The valve comprises a sealing gasket base which is fixedly connected with the bottom of the lower valve rod, the bottom of the sealing gasket base is provided with a sealing gasket, the bottom of the sealing gasket is provided with a pressing plate, and the pressing plate is connected with the sealing gasket base through bolts to fix the sealing gasket on the sealing gasket base.

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