A normally closed floating valve

Abstract

The present invention discloses a normally closed floating valve, including a valve body, a flap, a rotating shaft, and a driving device. The flap is connected to the bottom side of the rotating shaft located on the side of the outlet. A heightening plate is sandwiched between the bottom of the rotating shaft and the surface of the flap. Based on the state in which the flap blocks the inlet and the outlet, a reset rod parallel to the rotating shaft is pierced on the side wall of the valve cavity on the side of the flap corresponding to the rotating shaft for resetting the flap in the closed state. The normally closed floating valve is mainly used to collect liquid samples in special environments, such as deep-sea sample collection samples. The flap is driven by the rotating shaft to rotate and open the through valve cavity, and the sample is collected through the container connected to the outlet end. The connection between the flap and the rotating shaft can effectively reduce the rotation driving energy of the rotating shaft, so that the floating valve has a smaller energy consumption and can be applied to a variety of precision operations to reduce the energy consumption of the overall equipment and the difficulty of energy storage.

Description

Technical Field

[0001] The invention relates to the technical field of fluid sample sampling, and in particular to a normally closed floating valve. Background Art

[0002] With the development of science and technology and the progress of society, the scientific research on existing or renewable substances in the natural environment has been continuously expanded and deepened. For example, through geological research, metal elements that can be used by humans are provided; research on atmospheric composition is used to determine the degree of air pollution and the harm caused to the human body and to carry out effective prevention and control; research on seawater or other substances in the deep sea is used to determine the quality of the marine environment, so as to carry out effective prevention and control and maintain the stability of the entire ecosystem. For research in different fields, all of them are through the process of sample collection and finally analysis and research in the laboratory.

[0003] In the field of deep-sea research, the main collection method is to collect and study seawater in the deep sea to determine the water quality of deep-sea water and whether it is suitable for the survival of diverse organisms on the seabed. Due to the deep sea's deep depth, which can easily reach several thousand meters, and with the wide range of research content, it is not only about collecting deep-sea water, but also includes the detection and collection of various information on the seabed through the lowering of detection equipment. Therefore, the collection of seawater is part of the entire seabed research. Due to the large depth of the seabed, multiple detection equipment are usually combined into a whole, and a certain amount of equipment working energy is stored to perform detection and collection operations within a certain period. Furthermore, for the part of collecting seawater, the more additional equipment is used, the faster the energy is consumed, which shortens the detection cycle of the entire equipment on the seabed, and requires multiple processes of salvaging, storing energy, and lowering the equipment again, which invisibly increases the cost of the entire seabed research. Summary of the invention

[0004] In response to the above-mentioned problems, the present invention aims to provide a normally closed floating valve, which is attached to the seabed equipment to effectively collect seawater on the seabed, while reducing the energy consumption of the entire equipment, extending the detection cycle of the seabed equipment, and thereby reducing the cost of deep-sea research.

[0005] In order to achieve the above-mentioned object, the technical solution adopted by the present invention is as follows: a normally closed floating valve, comprising: a valve body, which has an inlet, an outlet and a valve inner cavity communicating with the inlet and the outlet, and an end of the valve body located at the outlet is provided with a connection structure of a container for collecting fluids passing through the inlet, the valve inner cavity and the outlet in sequence;

[0006] A flap, which is arranged in the inner cavity of the valve and is used to selectively connect or block the inlet and the outlet;

[0007] A rotating shaft, which is connected in parallel with the flap, and whose two ends are perpendicular and rotatably penetrate the symmetrical side walls of the valve inner cavity, and is used to drive the flap to rotate through its rotation;

[0008] A driving device is arranged on the outer wall of the valve body and is sealedly connected to one end of the rotating shaft, and is used for driving the rotating shaft to rotate so as to drive the flap to rotate.

[0009] Preferably, the flap is connected to the bottom side of the rotating shaft located on one side of the outlet.

[0010] Preferably, a heightening plate is sandwiched between the bottom of the rotating shaft and the surface of the flap.

[0011] Preferably, with the flap in a state of blocking the inlet and the outlet as a reference, a reset rod parallel to the rotation axis is provided on the side wall of the valve cavity on the side of the flap corresponding to the rotation axis for resetting the flap in a closed state.

[0012] Preferably, the reset rod is staggered with the rotating shaft on a vertical plane parallel to the side wall of the valve inner cavity, and the reset rod is arranged on one side of the rotation closing direction of the flap.

[0013] Preferably, the driving device comprises a driving rod which is sealingly connected to the rotating shaft and whose end extends to the outside of the valve body.

[0014] Preferably, a flat plate fork which is perpendicular to the flap and has a certain height when the flap is in a closed state is provided on the part of the drive rod extending out of the valve body, and the drive rod divides the flat plate fork into an upper half and a lower half, and a positioning plate is provided on the outer wall of one side of the valve body vertically corresponding to the lower half of the flat plate fork, and a return spring is provided between the lower half of the flat plate fork and the close end of the positioning plate and the positioning plate.

[0015] Preferably, a rotating plate is hingedly connected between the lower half of the flat fork and the connecting end of the return spring, and the top end of the return spring is connected to the bottom end of the rotating plate.

[0016] The beneficial effects of the present invention are as follows: the normally closed floating valve is mainly used to collect liquid samples in special environments, such as collecting samples in the deep sea. The flap is driven by the rotating shaft to rotate and open the inner cavity of the through valve, and the sample is collected through the container connected to the outlet end. The connection between the flap and the rotating shaft can effectively reduce the rotating shaft rotation driving energy, so that the floating valve has a smaller energy consumption and can be applied to a variety of precision operations to reduce the energy consumption of the overall equipment and the difficulty of energy storage. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] Figure 1 This is the overall structural diagram of the normally closed floating valve of the present invention.

[0018] Figure 2 For the present invention Figure 1 Section view.

[0019] Figure 3 This is a schematic diagram of the present invention using a cam block to open a valve. DETAILED DESCRIPTION

[0020] In order to enable those skilled in the art to better understand the technical solution of the present invention, the technical solution of the present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0021] See attached Figures 1 to 3 A normally closed floating valve shown in the figure comprises: a valve body 1, which has an inlet 1a, an outlet 1b and a valve inner cavity 1c which is connected with the inlet 1a and the outlet 1b, and the end of the valve body 1 located at the outlet 1b is provided with a connection structure of a container for collecting the fluid which passes through the inlet 1a, the valve inner cavity 1c and the outlet 1b in sequence. Preferably, the connection structure is an internal thread provided on the inner wall of the valve inner cavity 1c located on the side of the outlet 1b. A container with an external threaded port is selected to cooperate with the internal thread and seal the valve body 1, and the fluid which enters the valve inner cavity 1c of the valve body 1 through the inlet 1a is collected in the container through the outlet 1b.

[0022] In order to collect the fluid in a targeted manner, such as collecting seawater samples at a certain depth in the deep sea, it is necessary to lower the valve body 1 to the depth and collect the seawater samples at the depth into the container through the inlet 1a. Therefore, in the process of lowering the valve body 1 to the depth position, seawater at other depths is not allowed to enter the container through the valve cavity 1c. Therefore, the floating valve also includes a flap 2, which is arranged in the valve cavity 1c and is used to selectively connect or block the inlet 1a and the outlet 1b. In the process of the valve body descending, the passage of the valve cavity 1c between the inlet 1a and the outlet 1b is closed by the flap 2 to prevent seawater that is not at the collection depth from entering the container. When the valve body 1 as a whole descends to the predetermined collection depth, the flap 2 is flipped to open the passage of the valve cavity 1c, so that the seawater at the depth can enter the container for collection. After the collection is completed, the flap 2 is reversed to close the passage of the valve cavity 1c, thereby preventing the possibility of seawater of different depths entering the container again during the process of salvaging the valve body 1, thereby improving the accuracy of collecting seawater of rated depth through the valve body 1. Similarly, the valve body can be used for accurate collection of fluids in other fields.

[0023] In order to realize the flipping of the flap 2, the valve body 1 further includes a rotating shaft 3, which is connected in parallel with the flap 2, and the two ends of the rotating shaft 3 are vertical and rotatably penetrated on the symmetrical side walls of the valve inner cavity 1c, and is used to drive the flap 2 to rotate through its rotation. Figure 2As shown, the parallel connection means that the shaft 3 is connected to the plane on one side of the flap 2, and is not directly arranged in the flap 2. This parallel connection method makes the rotation center of the flap 2 and the axis of the shaft 3 have a certain height horizontal position difference, so that the straight-line distance from the rotating edge of the flap 2 to the rotation center of the axis of the shaft 3 is extended, thereby increasing the linear speed of the flap 2 when the flap 2 passes through the shaft 3 at the same rotation speed, so that at the same rotation angle of the shaft 3, the rotation stroke of the edge of the flap 2 is longer, and the opening is larger, so that more fluid can quickly fill the container, improve the collection efficiency, and at the same time effectively reduce the energy consumed by the shaft 3 when the flap 2 is rotated to open the flap 2. Especially for operations such as collecting seawater samples in the deep sea, the collection valve body 1 is only a component of the entire underwater equipment, and the underwater equipment with more components needs to consume more accumulated energy. Therefore, the energy used by the valve body 1 to collect seawater is effectively reduced, and more energy can be provided for other underwater equipment, so that it can operate for a longer period of time in the deep sea, greatly reducing the cost of salvaging the underwater equipment. Preferably, both end portions of the rotating shaft 3 are located in the side wall of the valve body, and do not penetrate the side wall of the valve body 1 , so as to improve the sealing performance of the valve body 1 .

[0024] In order to realize the driving effect on the rotating shaft 3 so as to open the flap 2 to collect the fluid, the valve body 1 also includes a driving device, which is arranged on the outer wall of the valve body 1 and is sealed with one end of the rotating shaft 3, and is used to drive the rotating shaft 3 to rotate, thereby driving the flap 2 to rotate.

[0025] In order to realize the parallel connection between the rotating shaft 3 and the flap 2, specifically, the flap 2 is connected to the bottom side of the rotating shaft 3 located on the side of the outlet 1b. That is, the rotating shaft 3 is arranged outside the receiving space formed by the flap 2 and the bottom connection container, reducing the occupation of the receiving space by the rotating shaft 3, so as to increase the collection of more fluid samples in the receiving space.

[0026] In order to further enable the flap 2 to open a larger opening width within a certain rotation angle of the rotating shaft 3, an increasing plate 4 is sandwiched between the bottom of the rotating shaft 3 and the surface of the flap 2. The increasing plate further increases the straight-line length from the edge of the flap 2 to the rotation center of the axis of the rotating shaft 3, and further increases the rotational linear speed of the edge of the flap 2, so that at the same rotation angle of the rotating shaft 3, the opening opened by the flap 2 is larger, so that more fluid can quickly fill the container, thereby improving the collection efficiency and further reducing the energy consumption of the rotating shaft 3 when rotating to open the flap 2.

[0027] In order to quickly and accurately reset the flap 2 after the container is full of fluid to achieve the closed sealing of the container, based on the state of the flap 2 blocking the inlet 1a and the outlet 1b, a reset rod 5 parallel to the rotating shaft 3 is provided on the side wall of the valve cavity 1c on the corresponding side of the flap 2 with the rotating shaft 3, which is used to reset the flap 2 in the closed state. That is, a reset rod is provided on the side wall of the valve cavity 1c on the side of the flap 2 connected to the container. When the flap 2 rotates in the opposite direction from the open state to the parallel state to seal and block the valve cavity 1c, the flap 2 rotates to contact the reset rod 5 to achieve the positioning and restriction of the reset position of the flap 2, so that the flap 2 can quickly return to the state of sealing and blocking, and the closed state of the flap 2 is reliably maintained by the reset rod 5, so as to avoid the impact of the fluid (such as seawater) outside the valve body 1 on the flap 2, which affects its airtightness.

[0028] In order to effectively realize the reset and seal of the flap 2, the reset rod 5 is staggered with the rotating shaft 3 on a vertical plane parallel to the side wall of the valve inner cavity 1c (such as Figure 2 As shown), and the reset rod 5 is arranged in the rotation closing direction of the flap 2 ( Figure 2 In other words, when the flap 2 is rotated and reset, the reset rod 5 staggered with the shaft 3 can effectively block the rotation process of the flap 2 on the corresponding side, so as to achieve an accurate reset sealing position of the flap 2. Preferably, the shaft 3 is arranged on one side of the midline position of the flap 2. That is, the flap 2 is divided into left and right sides with unequal areas by the shaft 3, so as to achieve a longer straight-line distance from the edge of the flap 2 on the side with a larger area to the rotation center of the axis of the shaft 3, further improve the rotation linear speed of the edge of the flap 2 and the width of the opening, so that more fluid can quickly fill the container, improve the collection efficiency, and at the same time further reduce the energy consumption of the shaft 3 when the flap 2 is rotated to open.

[0029] In order to realize the rotational drive of the rotating shaft 3, the driving device includes a driving rod 6 which is sealed and connected to the rotating shaft 3 and the end of which extends to the outside of the valve body 1. In order to realize the driving effect of the driving rod 6, a driving motor (not shown in the figure) is connected to the end of the driving rod 6 to drive the driving rod 6. The rotation of the rotating shaft 3 is controlled by the driving motor, and the flap 2 is driven to rotate to penetrate the valve cavity 1c and collect the fluid into the container. After the collection is completed, the valve cavity 1c is reversely closed by the driving motor again, and the reset seal is reset by the reset rod 5.

[0030] On the basis of the above-mentioned driving motor driving the driving rod 6, in order to further reduce the energy consumption of the driving motor, a flat plate fork 7 having a certain height and being perpendicular to the flap 2 when the flap 2 is closed is provided on the portion of the driving rod 6 extending out of the valve body 1, and the driving rod 6 divides the flat plate fork 7 into an upper half 7a and a lower half 7b, and a positioning plate 8 is provided on the outer wall of one side of the valve body 1 vertically corresponding to the lower half 7b of the flat plate fork 7, and a return spring 9 is provided between the lower half 7b of the flat plate fork 7 and the end close to the positioning plate 8 and the positioning plate 8. Figure 3 As shown, a driving mechanism is arranged outside the valve body 1, which has a rotating disk 11 (a liquid inlet gap is left between it and the inlet 1a, not shown in the figure), and a cam block 12 is arranged on the side wall of the rotating disk 11, and the cam block 12 has an arc surface 12a that contacts the upper half 7a of the flat fork. A driving motor (not shown in the figure) is connected to the rotating disk 11, and the rotating disk 11 and the cam block 12 are driven by the driving motor to rotate, and the arc surface 12a of the cam block 12 contacts the upper half 7a of the flat fork 7 to make the flat fork 7 rotate around the driving rod 6, and drive the driving rod 6 to rotate, and then drive the rotating shaft 3 and the flap 2 to rotate in turn, so as to penetrate the valve cavity 1c and allow the fluid to enter the container for collection. Preferably, the length of the upper half 7a is greater than the length of the lower half 7b, so as to realize the labor-saving characteristics of the longer torque of the upper half 7a, and reduce the torque output and energy consumption of the driving motor. When the collection is completed, the drive motor is no longer needed. The deflected state of the flat fork 7 is straightened by the elastic recovery of the reset spring 9, so that the flap 2 contacts the reset rod 5 for sealing reset, and the sealing reset state of the flap 2 is maintained by the elastic action of the reset spring 9. At the same time, under the action of the reset spring 9, the flat fork 7 reacts to the cam block 12 to reset it, the turntable 11 and the drive motor. In the process of resetting the flap 2 and the flat fork 7 by the reset spring 9, the energy input of the drive motor is removed, so that in the complete process of opening and closing the flap 2, only one-way energy input of the drive motor is required. Therefore, under the joint action of the flat fork 7 and the reset spring 9, the energy output of the drive motor is effectively reduced, the energy consumption of the valve body 1 is reduced, and the cycle of deep-sea operations can be effectively extended.

[0031] In order to reduce the energy of the driving motor that is consumed excessively by the flat fork 7 to overcome the pulling force of the return spring 9 during the opening of the flap 2, a rotating plate 10 is hingedly connected between the lower half 7b of the flat fork 7 and the connection end of the return spring 9, and the top end of the return spring 9 is connected to the bottom end of the rotating plate 10. In a structure without the rotating plate 10, when the flat fork 7 rotates to open the flap 2, the bottom end of the flat fork 7 connected to the return spring 9 will rotate and rise to a higher height, which will cause the return spring 9 to extend longer, and the reverse pulling force of the return spring 9 will also increase synchronously. The driving motor needs to overcome the increased reverse pulling force, which requires more energy consumption. The rotating plate 10 is set, and when the flat plate fork 7 rotates to open the flap 2, the rotating plate 10 is hinged to the lower half 7b of the flat plate fork 7, and under the action of the pulling force of the return spring 9, the rotating plate 10 is rotated relative to the flat plate fork 7 through the hinge, while the rotating plate 10 is still kept in a relatively stable vertical state, so that the bottom end of the rotating plate 10 connected to the return spring 9 will not rotate and rise with the lower half 7b of the flat plate fork 7, thereby reducing the elongation of the return spring 9, avoiding the increase of its elastic tension, and finally saving the energy consumption of the drive motor.

[0032] The principle of the present invention is: the normally closed floating valve is mainly used to collect liquid samples in special environments, such as collecting samples in the deep sea. The flap is driven by the rotating shaft to rotate and open the inner cavity of the through valve, and the sample is collected through the container connected to the outlet end. The connection between the flap and the rotating shaft can effectively reduce the rotation drive energy of the rotating shaft, so that the floating valve has a smaller energy consumption and can be applied to a variety of precision operations to reduce the energy consumption of the overall equipment and the difficulty of energy storage.

[0033] The above shows and describes the basic principles, main features and advantages of the present invention. It should be understood by those skilled in the art that the present invention is not limited to the above embodiments, and the above embodiments and descriptions are only for explaining the principles of the present invention. Without departing from the spirit and scope of the present invention, the present invention may have various changes and improvements, which fall within the scope of the present invention to be protected. The scope of protection of the present invention is defined by the attached claims and their equivalents.

Claims

1. A normally closed floating valve, comprising: A valve body (1) having an inlet (1a), an outlet (1b) and a valve inner cavity (1c) communicating with the inlet (1a) and the outlet (1b); a connection structure for a container for collecting fluids passing through the inlet (1a), the valve inner cavity (1c) and the outlet (1b) in sequence is provided at the end of the valve body (1) located at the outlet (1b); A flap (2) disposed in the valve inner cavity (1c) and used for selectively connecting or blocking the inlet (1a) and the outlet (1b); A rotating shaft (3) connected in parallel with the flap (2), with both ends of the rotating shaft (3) vertically and rotatably penetrating the symmetrical side walls of the valve inner cavity (1c), and used to drive the flap (2) to rotate through its rotation; The rotation centers of the flap (2) and the axis of the rotating shaft (3) have a horizontal position difference; a driving device, which is arranged on the outer wall of the valve body (1) and is sealedly connected to one end of the rotating shaft (3), and is used to drive the rotating shaft (3) to rotate, thereby driving the flap (2) to rotate; The flap (2) is connected to the bottom side of the rotating shaft (3) located on one side of the outlet (1b); A heightening plate (4) is sandwiched between the bottom of the rotating shaft (3) and the surface of the flap (2); Based on the state in which the flap (2) blocks the inlet (1a) and the outlet (1b), a reset rod (5) parallel to the rotation axis (3) and used for resetting the flap (2) in a closed state is provided on the side wall of the valve cavity (1c) on the side of the flap (2) corresponding to the rotation axis (3); The reset rod (5) is arranged alternately with the rotating shaft (3) on a vertical plane parallel to the side wall of the valve inner cavity (1c), and the reset rod (5) is arranged on one side of the rotation closing direction of the flap (2); The driving device comprises a driving rod (6) which is sealedly connected to the rotating shaft (3) and has an end portion extending to the outside of the valve body (1); A flat plate fork (7) having a certain height and being perpendicular to the flap (2) when the flap (2) is in a closed state is provided on the portion of the driving rod (6) extending out of the valve body (1); the driving rod (6) divides the flat plate fork (7) into an upper half (7a) and a lower half (7b); a positioning plate (8) is provided on an outer wall of one side of the valve body (1) vertically corresponding to the lower half (7b) of the flat plate fork (7); a return spring (9) is provided between the lower half (7b) of the flat plate fork (7) and the end close to the positioning plate (8) and the positioning plate (8); The length of the upper part (7a) is greater than the length of the lower part (7b); A rotating disk (11) is arranged outside the valve body (1), a liquid inlet gap is left between the rotating disk (11) and the inlet (1a), and a cam block (12) is arranged on the side wall of the rotating disk (11), the cam block (12) having an arc surface (12a) in contact with the upper half (7a) of the flat plate shift fork (7).

2. A normally closed floating valve according to claim 1, characterized in that: The connecting end between the lower half (7b) of the flat fork (7) and the reset spring (9) is also hingedly connected with a rotating plate (10), and the top end of the reset spring (9) is connected to the bottom end of the rotating plate (10).

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