An emergency shut-off valve for chemical tank trucks

Abstract

The present invention relates to an emergency shut-off valve for a chemical tank truck, comprising an external valve body and an internal valve body installed on the external valve body, a heating chamber is provided at the connection between the external valve body and the internal valve body, and an air inlet joint and an air outlet joint communicating with the heating chamber are installed on the top outer edge of the external valve body; a sunken step is provided on the inner circle of the flange at the top of the external valve body, an annular groove is provided at the bottom of the internal valve body, and the annular groove is installed on the step to form a heating chamber; a circle of cutting grooves is provided on the outer side of the external valve body below the flange. In the present invention, since the valve body is divided into an internal valve body and an external valve body, and a heating chamber is provided between the internal valve body and the external valve body, heating steam can be introduced into the heating chamber, so that the chemical product is heated when it is discharged, and the blockage caused by crystallization of the chemical product due to the low temperature inside the valve body is prevented, thereby ensuring the normal discharge and discharge efficiency of the chemical product.

Description

Technical Field

[0001] The invention belongs to the technical field of emergency cut-off valves, and in particular relates to an emergency cut-off valve for a chemical tank truck. Background Art

[0002] The self-sealing vehicle-mounted tank emergency shut-off valve that can meet the needs of multiple types of media is mainly used in tank trucks for transporting chemical media such as petroleum and hazardous chemicals. Among them, tank trucks used to transport some chemical products are solid at room temperature, but become liquid after heating. In order to facilitate the discharge of such chemical products from the tank truck, they need to be heated. When discharging such chemical products, the traditional emergency shut-off valve cannot heat the valve body sealing surface of the chemical products, which causes blockage in the valve body and the shedding of the sealing ring due to crystallization, affecting the efficiency of chemical discharge. Summary of the invention

[0003] The purpose of the present invention is to provide an emergency shut-off valve for a chemical tank truck to solve the problem of blockage in the valve body when chemical products are discharged.

[0004] An emergency shut-off valve for a chemical tank truck of the present invention is implemented as follows:

[0005] An emergency shut-off valve for a chemical tank truck, comprising an external valve body and an internal valve body mounted on the external valve body, a heating chamber being arranged at the connection between the external valve body and the internal valve body, and an air inlet joint and an air outlet joint communicating with the heating chamber being arranged at the top outer edge of the external valve body;

[0006] The inner circle of the flange at the top of the external valve body is provided with a sunken step, and the bottom of the internal valve body is provided with an annular groove, and the annular groove is installed on the step to form a heating chamber;

[0007] A circle of cutting grooves is arranged on the outer side of the external valve body below the flange.

[0008] Furthermore, the built-in valve body and the external valve body are fixedly connected or detachably connected.

[0009] Furthermore, the air inlet connector and the air outlet connector are installed on the outer edge of the flange at the top of the external valve body.

[0010] Furthermore, a sealing plate is installed in the built-in valve body, a spring is sleeved on the sealing plate shaft at the top of the sealing plate, and the top end of the sealing plate shaft extends into the central through hole of the sealing cover covering the top of the built-in valve body.

[0011] Furthermore, the external valve body is provided with a push rod whose top extends into the bottom of the sealing plate, a connecting rod hinged to the bottom of the push rod, and a transmission shaft transversely installed on the wall of the external valve body, and the connecting rod is sleeved on the transmission shaft and rotates synchronously with the transmission shaft.

[0012] Furthermore, a clamping plate is provided on the connecting rod in the direction of the outer arc surface of the external valve body, and a clamping port which is in the same direction and matches with the clamping plate is provided on the connecting rod.

[0013] Furthermore, one end of the transmission shaft passes through the side wall of the external valve body and is connected to a cylinder via a pneumatic connecting rod.

[0014] Furthermore, a heat-insulating cover is provided on the outer arc surface of the external valve body.

[0015] After adopting the above technical solution, the present invention has the following beneficial effects:

[0016] Since the valve body of the present invention is divided into an internal valve body and an external valve body, and a heating chamber is provided between the internal valve body and the external valve body, heating steam can be introduced into the heating chamber, so that the chemical product is heated when it is discharged, preventing the chemical product from crystallizing due to the low temperature inside the valve body during the discharge process and causing blockage of the discharge port, thereby ensuring the normal discharge and discharge efficiency of the chemical product. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] The present invention is further described below in conjunction with the accompanying drawings and embodiments.

[0018] Figure 1 is a structural diagram of an emergency shut-off valve for a chemical tank truck according to a preferred embodiment of the present invention;

[0019] Figure 2 1 is a front view of an emergency shut-off valve for a chemical tank truck according to a preferred embodiment of the present invention;

[0020] Figure 3 yes Figure 2 Sectional view in the middle AA direction;

[0021] Figure 4 1 is a structural diagram of an external valve body of an emergency shut-off valve for a chemical tank truck according to a preferred embodiment of the present invention;

[0022] Figure 5 This is a structural diagram of a built-in valve body of an emergency shut-off valve for a chemical tank truck according to a preferred embodiment of the present invention;

[0023] Figure 6 This is a diagram of the internal structure of an emergency shut-off valve for a chemical tank truck according to a preferred embodiment of the present invention;

[0024] In the figure: external valve body 1, internal valve body 2, heating chamber 3, air inlet connector 4, air outlet connector 5, flange 6, step 7, annular groove 8, cutting groove 9, sealing plate 10, sealing plate shaft 11, spring 12, sealing cover 13, sealing ring 14, push rod 15, connecting rod 16, transmission shaft 17, clamping plate 18, bayonet 19, pneumatic connecting rod 20, cylinder 21, pressure cover plate 22, cylinder frame 23, cylinder frame 24, thermal insulation cover 25. DETAILED DESCRIPTION

[0025] In order to make the purpose, technical solutions and advantages of the embodiments of the present invention clearer, the technical solutions in the embodiments of the present invention will be clearly and completely described below in conjunction with the drawings in the embodiments of the present invention. Obviously, the described embodiments are only part of the embodiments of the present invention, not all of the embodiments.

[0026] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the invention claimed for protection, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0027] like Figure 1-6 As shown, an emergency shut-off valve for a chemical tank truck comprises an external valve body 1 and an internal valve body 2 installed on the external valve body 1, a heating chamber 3 is provided at the connection between the external valve body 1 and the internal valve body 2, and an air inlet joint 4 and an air outlet joint 5 which are in communication with the heating chamber 3 are installed on the top outer edge of the external valve body 1.

[0028] The emergency shut-off valve disclosed in the present invention may be a 90° emergency shut-off valve, or a 45° or 180° emergency shut-off valve. This embodiment takes a 45° emergency shut-off valve as an example for description.

[0029] like Figure 4-5 As shown, in order to facilitate the connection between the external valve body 1 and the internal valve body 2, a sunken step 7 is provided on the inner circle of the flange 6 on the top of the external valve body 1, and an annular groove 8 is provided on the bottom of the internal valve body 2. The annular groove 8 is installed on the step 7 to form a heating chamber 3.

[0030] Except for the air inlet joint 4 and the air outlet joint 5, the rest of the heating chamber 3 is sealed to prevent the leakage of heating steam from causing safety problems.

[0031] Preferably, the top surface of the annular groove 8 is not higher than the upper surface of the flange 6, so that the emergency shut-off valve can be easily installed on the tank truck to ensure the sealing of the connection.

[0032] In order to realize the function of the emergency shut-off valve, a circle of shut-off grooves 9 is provided on the outer side surface of the external valve body 1 below the flange 6 .

[0033] When the tank truck is hit, the emergency shut-off valve will be disconnected along the cut-off groove 9 under the action of violent external force, so as to separate the oil unloading pipeline from the tank body without affecting the sealing effect of the tank body, thereby preventing leakage of chemical products in the tank and ensuring the safety of transportation.

[0034] The built-in valve body 2 and the external valve body 1 are fixedly connected or detachably connected.

[0035] Preferably, the fixed connection can be performed by welding, which can increase the stability of the connection between the built-in valve body 2 and the external valve body 1 and the sealing of the heating chamber.

[0036] The detachable connection can be made by a clamping method, where the annular groove 8 is clamped on the step 7 of the inner ring of the flange 6, and the inner ring of the flange 6 is used to limit the position of the annular groove 8. A sealing gasket is installed between the annular groove 8 and the inner ring of the flange 6, and a sealing gasket is also installed between the bottom of the inner wall of the annular groove 8 and the step to ensure the sealing of the heating chamber.

[0037] The detachable connection allows the external valve body 1 or the internal valve body 2 to be replaced at will, thus reducing maintenance costs.

[0038] To prevent the air inlet connector 4 and the air outlet connector 5 from affecting the installation of the entire emergency shut-off valve, the air inlet connector 4 and the air outlet connector 5 are installed on the outer edge of the flange 6 on the top of the external valve body 1 .

[0039] Preferably, the air inlet connector 4 and the air outlet connector 5 are arranged in parallel, which can facilitate connection to the heating steam pipeline.

[0040] like Figure 3 and 6 As shown, in order to realize the connection and closing of the emergency shut-off valve, a sealing plate 10 is installed in the built-in valve body 2, and a spring 12 is sleeved on the sealing plate shaft 11 at the top of the sealing plate 10, and the top end of the sealing plate shaft 12 extends into the central through hole of the sealing cover 13 covering the top of the built-in valve body 2.

[0041] When in the closed state, the sealing plate 10 is located at the bottom of the inner side of the built-in valve body 2 and is sealed with the built-in valve body 2. When connected, the sealing plate overcomes the pressure of the spring 12 and moves upward, thereby connecting the emergency shut-off valve. When closed, the sealing plate 10 is reset under the action of the spring 12.

[0042] Preferably, the sealing plate 12 is covered with a sealing ring 14. The sealing ring 14 can increase the sealing performance between the sealing plate 10 and the built-in valve body 2.

[0043] In order to facilitate lifting the sealing plate 10, the external valve body 1 is provided with a top rod 15 whose top extends into the bottom of the sealing plate 10 and a connecting rod 16 hinged at the bottom of the top rod 15, as well as a transmission shaft 17 horizontally installed on the inner wall of the external valve body 1. The connecting rod 16 is sleeved on the transmission shaft 17 and rotates synchronously with the transmission shaft 17.

[0044] The rotation of the transmission shaft 17 drives the connecting rod 16 to rotate, thereby pushing the top rod 15 upward through the rotation of the connecting rod 16, pushing the sealing plate 10 upward, and opening the emergency shut-off valve.

[0045] Preferably, in order to achieve transmission connection between the transmission shaft 17 and the connecting rod 16, the transmission shaft 17 and the connecting rod 16 are connected via a spline.

[0046] In order to facilitate the positioning of the push rod 15 , a clamping plate 18 is provided on the connecting rod 16 in the direction of the outer arc surface of the external valve body 1 , and a clamping port 19 which is in the same direction and matches with the clamping plate 18 is provided on the connecting rod 16 .

[0047] When the emergency shut-off valve is opened, the hinge between the connecting rod 16 and the push rod 15 rotates toward the inner arc surface of the external valve body 1, thereby lifting the push rod 15. When the emergency shut-off valve is fully opened, the clamping plate 18 is clamped in the clamping port 19. At this time, the angle between the connecting rod 16 and the push rod 15 toward the inner arc surface of the external valve body 1 is less than 180 degrees. The positions of the push rod 15 and the connecting rod 16 can be locked, thereby ensuring the stability of the emergency shut-off valve when it is connected.

[0048] In order to provide power to the transmission shaft 17 , one end of the transmission shaft 17 passes through the side wall of the external valve body 1 and is connected to a cylinder 21 through a pneumatic connecting rod 20 .

[0049] Specifically, the piston rod of the cylinder 21 is connected to the transmission shaft 17 through the hinged pneumatic connecting rod 20. When the piston rod of the cylinder 21 is extended, the transmission shaft 17 can be driven to rotate toward the inner arc surface of the external valve body 1, so that the connecting rod 16 can be used to push the push rod 15 up, and the push rod 15 pushes the sealing plate 10 up, thereby connecting the emergency shut-off valve. On the contrary, when the piston rod of the cylinder 21 is retracted, the transmission shaft 17 rotates toward the outer arc surface of the external valve body 1, thereby resetting the push rod 15, and at this time, the sealing plate 10 is reset under the action of the spring 12, thereby closing the emergency shut-off valve.

[0050] Preferably, in order to conveniently display the switch status of the emergency shut-off valve, a gland plate 22 is installed on the inner side of the transmission shaft 17 connected to the pneumatic connecting rod 20 , and the gland plate 22 is fixed on the outer wall of the external valve body 1 .

[0051] Specifically, the gland plate 22 is marked with the rotation direction of the emergency shut-off valve when it is opened and closed.

[0052] Preferably, in order to facilitate fixing of the cylinder 21 , a cylinder frame 24 is installed on the flange ring 23 at the bottom of the external valve body 1 , and the cylinder 21 is installed on the cylinder frame 24 .

[0053] In order to prevent crystallization and blockage of chemical products due to temperature drop when passing through the outer valve body, a heat preservation cover 25 is provided on the outer arc surface of the external valve body 1 .

[0054] When using the emergency shut-off valve provided in this embodiment to discharge chemical products that require heating, first, heating steam is introduced into the heating chamber 3, and then the cylinder 21 is started to open the emergency shut-off valve. The heating of the heating steam in the heating chamber 3 can prevent the chemical products from crystallizing during the discharge process, thereby ensuring the smoothness of the discharge and improving the discharge efficiency.

[0055] Based on the above ideal embodiments of the present invention, the relevant staff can make various changes and modifications without departing from the technical concept of the present invention through the above description. The technical scope of the present invention is not limited to the contents of the specification, and its technical scope must be determined according to the scope of the claims.

[0056] In the description of the present invention, it is necessary to understand that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present invention and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on the present invention.

[0057] In the present invention, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0058] In addition, the terms "horizontal", "vertical", "overhanging" and the like do not mean that the components are required to be absolutely horizontal or overhanging, but can be slightly tilted. For example, "horizontal" only means that its direction is more horizontal than "vertical", and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0059] In the present invention, unless otherwise clearly specified and limited, a first feature being above or below a second feature may include the first and second features being in direct contact, or may include the first and second features not being in direct contact but being in contact through another feature between them. Moreover, a first feature being above, above, and above a second feature includes the first feature being directly above and obliquely above the second feature, or simply means that the first feature is higher in level than the second feature. A first feature being below, below, and below a second feature includes the first feature being directly below and obliquely below the second feature, or simply means that the first feature is lower in level than the second feature.

Claims

1. An emergency shut-off valve for a chemical tank truck, characterized in that: It comprises an external valve body (1) and an internal valve body (2) mounted on the external valve body (1), a heating chamber (3) being arranged at the connection between the external valve body (1) and the internal valve body (2), and an air inlet joint (4) and an air outlet joint (5) communicating with the heating chamber (3) being arranged on the top outer edge of the external valve body (1); The inner ring of the flange (6) at the top of the external valve body (1) is provided with a sunken step (7), and the bottom of the internal valve body (2) is provided with an annular groove (8), and the annular groove (8) is installed on the step (7) to form a heating chamber (3); A circle of cutting grooves (9) is provided on the outer side surface of the external valve body (1) located below the flange (6); The top surface of the annular groove (8) is not higher than the upper surface of the flange (6); The air inlet connector (4) and the air outlet connector (5) are mounted on the outer edge of the flange (6) at the top of the external valve body (1); The air inlet connector (4) and the air outlet connector (5) are arranged in parallel.

2. The emergency shut-off valve for a chemical tank truck according to claim 1, characterized in that: The built-in valve body (2) and the external valve body (1) are fixedly connected or detachably connected.

3. The emergency shut-off valve for a chemical tanker according to claim 1, characterized in that: A sealing plate (10) is installed in the built-in valve body (2), a spring (12) is sleeved on a sealing plate shaft (11) at the top of the sealing plate (10), and the top end of the sealing plate shaft (11) extends into the central through hole of a sealing cover (13) covering the top of the built-in valve body (2).

4. The emergency shut-off valve for a chemical tank truck according to claim 3, characterized in that: The external valve body (1) is provided with a push rod (15) whose top extends into the bottom of the sealing plate (10), a connecting rod (16) hinged to the bottom of the push rod (15), and a transmission shaft (17) installed transversely on the inner wall of the external valve body (1), and the connecting rod (16) is sleeved on the transmission shaft (17) and rotates synchronously with the transmission shaft (17).

5. The emergency shut-off valve for a chemical tanker according to claim 4, characterized in that: The connecting rod (16) is provided with a clamping plate (18) in the direction of the outer arc surface of the external valve body (1), and the connecting rod (16) is provided with a clamping port (19) which is in the same direction as and matches the clamping plate (18).

6. The emergency shut-off valve for a chemical tanker according to claim 4, characterized in that: One end of the transmission shaft (17) passes through the side wall of the external valve body (1) and is connected to a cylinder (21) via a pneumatic connecting rod (20).

7. The emergency shut-off valve for a chemical tanker according to claim 1, characterized in that: A heat-insulating cover (25) is provided on the outer arc surface of the external valve body (1).

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