TW202337790A - Transport container with clamping disk - Google Patents

Abstract

A container for the transport and the storage of liquids includes at least one upwardly open nozzle (28) at the top of an inner container. A clamping disk (36) has an internal thread (38) that can be screwed onto an external thread (30) of the nozzle (28), thereby clamping an upper bottom (20) at the edge of its opening (34). A screw lock interacts with the external thread (30) of the nozzle (28) and the internal thread (38) of the clamping disk (36) and prevents unintentional loosening of the clamping disk (36) and the nozzle (28).

Description

Shipping container with clamping plate

The invention relates to a container for transporting and storing liquids. It has an inner body and an outer container. The inner body is made of plastic and is used to contain liquid. The outer container is made of plastic and has a rigid bottom, a rigid frame, and Rigid upper sole.

This container is known to be an intermediate bulk container (IBC) and contains a pallet so that it can be easily moved by a forklift. Liquid can be injected and again removed from the inner volume through the nozzle and dip tube of the inner volume. This container is often used for flammable, highly toxic, high purity and highly acidic liquids, such as those used in the semiconductor industry.

From the German invention patent application number DE 195 35 707 A1, a disposable and reusable container is known. It has an inner body, and an injection neck is integrally formed on the upper side of the inner body. The end of the inner body is formed from the outer body. The upper bottom extends outward. The injection neck is placed in the opening of the rigid upper bottom using a slotted clamping ring, and the opening edge of the upper bottom is against the upper side of the inner body. Close the injection neck with the screw cap.

During the use of the container, shape changes will occur in the content body. For example, rising injection temperatures and subsequent cooling phases can create a vacuum in the inner body, causing the inner body to deform. Different injection levels of the content body will also cause deformation. This deformation also changes the exact position of the nozzle opening to a certain extent, which is critical during injection and evacuation. The reason is that dangerous ingredients often require operators to wear protective clothing and protective gloves, making delicate engine operation difficult. The precise positioning of the nozzle relative to the upper base is another issue. Due to vibrations caused during transportation, the connection between the nozzle and the upper base will loosen, causing the nozzle to move loosely and sway in the opening, making it difficult to inject and remove liquid.

German utility model application number 20 2022 101 418.3 corresponds to this patent application. The German Patent and Trademark Office has conducted a prior art search for this utility model application. The search report proposed two documents, DE 10 2009 016 451 B3 and US 4 164 304 A, classified as Level A (documents defining technical background).

The object of the present invention is to specify a container for transporting and storing liquids which is simple in construction and improves handling when filling and emptying the contents.

This object is solved by a combination of features of claim 1. Beneficial implementations are specified in the appendix.

In the present invention, the nozzle is integrally formed with the inner body and has external threads and internal threads. The clamping plate with internal threads can be threaded into the external threads of the nozzle, thereby clamping the upper bottom at the edge of its opening. In this way, the nozzle is fixed to a rigid upper base and cannot change its position relative to the outer volume, even if the inner volume is deformed due to different pressures or variable injection levels. Operations during filling and emptying are thus facilitated and the risk of doubtful liquid spillage is avoided. Furthermore, the present invention includes a thread lock, which interacts with the external thread of the nozzle and the internal thread of the clamping plate, and is suitable for preventing the clamping plate and the nozzle from loosening accidentally. This method can also improve the safety of the container because it can avoid loosening or detachment of the threaded connection caused by vibration during transportation and when the sealing plug is removed.

According to an embodiment of the present invention, at least the rigid upper base is composed of conductive plastic. For example, conductivity is produced by blending conductive carbon black particles or aluminum particles with plastic. Conductivity can be adjusted by eliminating charges caused by frictional static generated during injection and evacuation of the inner volume. The threaded connection from the upper bottom to the inner body is beneficial to perform three functions. On the one hand, the pipe body joint is accurately and stably fixed relative to the outer body. On the other hand, it resists the accidental loosening of the upper bottom from the nozzle, further avoiding the harm caused by discharge.

Another embodiment proposes that an electrically insulating sealing ring is disposed between the pipe joint and the nozzle. The pipe joint is made of conductive plastic and includes a conductive contact element that is electrically conductively connected to the clamping plate. The sealing ring is made of, for example, thermoplastic elastomer (TPE) and can provide a liquid-tight seal between the inner body and the external environment. With the help of conductive contact elements, the electrically insulating sealing ring is bridged to ensure continuous conductivity between the pipe joint, the clamping plate and the upper bottom, thereby reducing the risk of spontaneous discharge.

A further advantageous embodiment is characterized by the provision of an anti-rotation lock, which interacts with the contact element, the pipe joint and the clamping disk, and is adapted to prevent relative rotation of the pipe joint and the clamping disk. With the help of the anti-rotation lock, the pipe body joint is fixed to the clamping plate. Accidental loosening of the clamping plate is thus prevented by means of the thread lock mentioned further below. This means that even if the sealing plug is securely seated on the pipe joint, the pipe joint cannot be moved when the sealing plug is withdrawn, thereby improving overall container safety, for example because the sealing plug is screwed in a very tight manner or Threaded connections become stronger due to deformation. This prevents water from splashing outwards, for example. The functions of the thread lock and the anti-rotation lock ensure that even if the sealing plug is relatively tight, the pipe joint and the clamping plate will not loosen from the thread connection, thereby improving the safety of the overall container.

Based on a preferred embodiment, the inner body with the integrally formed nozzle is made of high-density polyethylene (HDPE) formed by blow molding or plastic rotation molding.

Figure 1 shows a portion of a transport container (10) for transporting and storing liquids according to the present invention in a perspective exploded view. A cross-section of the shipping container (10) is presented in Figure 2. The shipping container (10) includes an outer container (12) made of conductive plastic, preferably polyethylene (PE), with a rigid bottom (14) against a pallet (16) which ) has the dimensions of European standard pallets. The outer container (12) further includes a rigid frame (18) and a rigid upper base (20) or lid. An inner body (22) is accommodated in the outer body (12), which is made of plastic to hold liquid, preferably high-purity high-density polyethylene (HDPE). At least one device (24) for filling and/or emptying the inner body (22) is connected to the rigid upper base (20) and the inner body (22). A dip tube (25) forming part of the device (24) extends into the interior of the inner body (22). The inner volume (22) is filled and evacuated through the dip tube (25). An electrical ground connection (13) is provided for discharge from the outer container (12).

Figure 3 presents further details of the proposed device (24) and its connection to the upper base (20) and the inner body (22) in an exploded view. An upwardly opening nozzle (28) is integrally formed on the inner body (22). The proposed nozzle (28) has an external thread (30) and an internal thread (32). The inner body (22) is formed by blow molding or rotation molding, wherein the nozzle (28) is formed with its threads (30, 32) and at least one braking element (40). The rigid upper base (20) contains an opening (34) surrounding the nozzle (28) in a clearance manner.

The device (24) contains a clamping disc (36) with an internal thread (38) adapted to threadably engage the external thread (30) of the nozzle (28) during assembly, thereby engaging the edge of its opening (34) Clamp the upper bottom (20).

At least one first braking element (40) is formed at the bottom of the external thread (30). Under the side of the clamping plate (36) facing the nozzle (28), at least one second braking element (42) is formed in the lower area of the internal thread (38). A thread lock is formed with the help of these two braking elements (40, 42), wherein the braking elements (40, 42) latch each other when screwed in a clockwise direction, giving the clamping plate (36) a clockwise direction relative to the nozzle (28) guide. During the latching operation, the form fit prevents the clamping plate (36) from being detached from the nozzle (28) after the threaded connection is established. The clamping plate (36) contains a plurality of peripheral notches (44) into which a tool (not shown) can fit so that the screw connection can be made with effective torque. Preferably, the lower circumference of the first braking element on the external thread (30) of the nozzle (28) is formed as a protruding braking cam (40), and the second braking element on the clamping plate (36) is on the internal thread. The lower circumference of (38) forms the locking cam (42). The formation of the braking cam (40) on the externally threaded (30) stem has the advantage that reliable latching occurs even with varying thicknesses of the upper sole (20). However, it is also possible to form a first braking element (40) on the end face of the inner body (22), which in turn faces a second braking element (42) formed on the end face of the clamping disc (36) .

A pipe joint (26) has an external thread (46) on its upper part, which can be threaded into the internal thread (32) of the nozzle (28). The body joint (26) supports the dip tube (25), which is substantially shortened. A contact ring (50) is made of conductive plastic and abuts against an end surface (49) of the pipe joint (26). On its bottom face facing the tube body joint (26), the contact ring (50) has first braking means (52), such as braking teeth. The braking means (52) cooperate with a second braking means (54) present on the end face (49), also like a brake tooth. A sealing plug (56) with an external thread (58) serves for a liquid-tight seal of the inner body (22). The external threads (58) thread into the internal threads (48) of the body adapter (26). Under the threaded connection, the first braking means (52) and the second braking means (54) affect the fixed locking of the contact ring (50), so that the contact ring (50) and the pipe body joint (26) are clearly fixed. rotation position. The pitch of the braking means (52, 54) defines the angular resolution of the rotational position of the contact ring (50). For example, the low pitch of the brake teeth increases angular resolution.

In the embodiment shown in Figure 3, the contact ring (50) has a plurality of contact arms (60) radially bent from outside to inside along its circumference, and the contact arms include a third braking means (not shown in Figure 3). The third braking means cooperate with the fourth braking means (64) along the circumference of the clamping plate (36) and cooperate therein during the screwing. In this way, the pipe joint (26) can be prevented from rotating relative to the clamping plate (36) and subsequently rotating relative to the nozzle (28).

Figure 4 presents further details in several partial views, particularly how the contact ring (50) latches with the clamping plate (36). The lower figure shows the device (24) in its assembled state. Detail C is enlarged in the middle. The upper figure shows the contact ring (50) with the contact arm (60), below which is an enlarged view E of the contact arm (60). Each contact arm (60) contains a braking element (66). The braking element (66) is clearance-fitted between adjacent braking cams (64), and the adjacent braking cams (64) form a fourth braking means along the circumference of the clamping plate (36). The contact ring (50) is made of elastic plastic, and with the cooperation of the contact arm (60) and the brake cam (64), it makes a clicking sound on the ring part containing the brake cam (64).

When assembling the parts according to Figures 3 and 4, first clamp the control plate (36) with the help of a tool that matches the notch (44) with its internal thread (38) screwed to the external thread (30). On the upper bottom (20), on the other hand, the first braking element (40) elastically slides and locks on the second braking element (42) to form a thread lock. The pipe joint (26) is then inserted into the nozzle (28) and its external thread (46) is threaded into the internal thread (32). As the first braking means (52) comes into contact with the second braking means (54) of the pipe body joint (26), the contact ring (50) is then placed on the end surface (49) of the pipe body joint (26). The contact arm (60) fits on the ring portion of the brake cam (64), and the brake element (66) fits in the gap (68) between the brake cams (64), thereby fixing the rotational position of the contact ring (50). Finally, the external threads (58) of the sealing plug (56) thread into the internal threads (48) of the body adapter (26). With the help of the anti-rotation lock, on the one hand, it is formed through the first braking means (52) on the position contact ring (50) and the second braking means (54) on the position tube body joint (26), and on the other hand, through the The third braking means (66) and the fourth braking means (64) are formed, and the thread lock includes a first braking element (40) and a second braking element (42). On the other hand, the sealing plug (56) is removed in the counterclockwise direction. ) to release the sealing plug (56), such as for filling or emptying the inner body (22), loosening or detachment of the connection between the clamping plate (36) and the body joint (26) from the nozzle (28) is not possible . In this way, on the one hand, the position of the pipe joint (26) is clearly and accurately fixed, and on the other hand, the rotation position relative to the pipe joint (26) cannot be changed, which can improve the operation and safety of the entire container.

Figure 5 presents a partial cross-section of the device (24) for filling and/or emptying the inner volume in the assembled state. The same parts are marked in the same way. The nozzle (28) formed in the inner body (22) receives with its internal thread (32) a pipe joint (26) having an external thread (46). The clamping plate (36) clamps the upper base (20) via an annular liquid-tight seal (68) that provides a seal (the seal (68) is, for example, a thermoplastic elastomer molded sheet). An electrically insulating sealing ring (70) (also made of thermoplastic elastomer, for example) is disposed between the pipe joint (26) and the nozzle (28). The pipe joint (26), clamping plate (36) and upper bottom (20) are also made of conductive plastic to eliminate electric charges. The inner body (22) of high density polyethylene (HDPE) is non-conductive. Therefore, an important contact element in the form of a contact ring (50) is necessary, which establishes the necessary electrical connection between the tube joint (26) and the upper base (20) via the clamping plate (36). The sealing plug (56) threads its external thread (58) into the internal thread (48) of the body connector (26) and is sealed in a liquid-tight manner through other annular seals (72). The pipe joint (26) further has another internal thread (74). The internal thread (74) is firmly connected to an external thread (not shown) of an adapter device. During the filling and/or emptying of the inner body, the liquid to be injected is removed from the container or the liquid to be removed is supplied through the adapter device. Other devices.

When the brake cam (40) and the locking cam (42) of the clamping plate (36) are screwed to the base layer, the cross-section of the nozzle (28) is shown in Figure 6 (compare with Figure 3). The braking cam (40) has a rising slope (40a), a plateau area (40b) and a falling edge (40c). The locking cam (42) has a rising slope (42a), a plateau area (42b) and a falling edge (42c). When screwing in the direction of arrow (P1), as the locking cam (42) elastically bends relative to the material of the nozzle (28), the rising slopes (40a, 42a) slide past each other. After sliding over the plateau area (40b), the braking tip (42c) elastically engages the descending edge (40c) and locks in in the opposite direction. The operator can feel the fit of the braking tip (42c), further improving the fit operation.

Figure 7 shows another embodiment, in which the contact element is formed as a contact ring (76) with a blade (78). The screw (80) fits through the threaded piece (78) of the plate (78) to act as a fastener in the gap (68) between the braking cams (64), thereby establishing an electrical connection. The screw (80) can be made of conductive plastic. As in the embodiment according to Figure 3, the contact ring (76) may include a braking tooth, and the pipe body joint (26) may also include a braking tooth, so that the contact ring (76) and the pipe body joint (26) Establish precise angular position when latching against each other.

Figure 8 shows another embodiment in which the sheet (78) is formed at the edge along the tube joint (26) and is electrically conductive. Through their respective tips, the screws (80) can make electrical and mechanical elastic contact with the surface of the conductive clamping plate (36). In order to prevent the relative rotation of the tube joint (26) and the clamping plate (36), the tip of each screw (80) cooperates with the gap (68) between adjacent brake cams (64). In Figure 8, multiple coding holes (82) can be seen. Correspondingly, the coding pins fit into the tube connector (26) when it is connected to the adapter during injection/evacuation, preventing incorrect operation.

Figure 9 presents a detail of the engagement ring (26) between the braking teeth of the contact ring (50) and the tube body (compare also with Figure 3). The first braking means on the contact ring (50), marked 52, includes a circle of protruding braking teeth (52a), and the second braking means on the circumference of the tube body joint (26), marked 54, Consists of a ring of protruding detent teeth (54a). During latching, the opposing detent teeth (52a, 54a) engage the notches of adjacent detent teeth to prevent contact between the ring (50) and the pipe joint (26). ) mutual rotation.

(10): Shipping container (12): External container (13): Electrical ground connection (14): Bottom (15): Tray (18):Frame (20): Upper bottom (22): Content body (24): Device for injection and/or evacuation (25): dip tube (26): Pipe body joints (28):Nozzle (30): External thread (32): Internal thread (34):Open your mouth (36): Clamping plate (38): Internal thread (40): First braking element, brake cam (40a): rising slope (40b): Plateau area (40c): edge (42): Second braking element, locking cam (42a): rising slope (42b): Plateau area (42c): Braking tip (44): Notch (46): External thread (48): Internal thread (49): End face (50): Contact element, contact ring (52): First braking element, brake tooth (52a): Brake gear (54): Second braking element, brake tooth (54a): Brake gear (56):Sealing plug (58): External thread (60):Contact arm (64): The fourth braking method, brake cam (66): The third braking method, braking element (68): Gap (70): Electrical insulation sealing ring (72):Sealing ring (74): Internal thread (76): Contact ring (78): slice body (79):Thread (80):Screw (82): Coding hole

Embodiments of the present invention are explained below with reference to the drawings. Figure 1 shows a perspective exploded view of a transport container for transporting and storing liquids; Figure 2 presents a schematic cross-section of the container; Figure 3 presents an exploded view showing parts of the device for filling and/or emptying the inner body, as well as parts of the upper base and the nozzle of the inner body; Figure 4 shows a contact ring with contact arms in various partial views; Figure 5 shows a partial cross-section in the assembled state for filling and/or emptying the inner body; Figure 6 presents a detailed schematic diagram of the braking cam and the locking cam; Figure 7 presents another embodiment of a contact piece on a contact ring; Figure 8 presents another embodiment of a contact patch on a pipe joint; and Figure 9 shows the braking teeth on the contact ring and tube body joint.

(20): Upper bottom

(22):Content body

(24): Devices for injection and/or evacuation

(25): Dip tube

(26): Pipe body joint

(28):Nozzle

(30): External thread

(32): Internal thread

(34):Open your mouth

(36): Clamping plate

(38): Internal thread

(40): First braking element, brake cam

(42): Second braking element, locking cam

(44):Notch

(46): External thread

(48): Internal thread

(49):End face

(50): Contact element, contact ring

(52): First braking element, brake tooth

(54): Second braking element, brake tooth

(56):Sealing plug

(58): External thread

(60):Contact arm

(64): The fourth braking method, brake cam

Claims (13)

A container (10) for transporting and storing liquids, containing: An inner body (22) made of plastic to contain liquid; An outer container (12) is made of plastic and has a rigid lower bottom (14), a rigid frame (18), and a rigid upper bottom (20); At least one upwardly opening nozzle (28) is located at the top of the inner body (22) for injecting and/or purging the inner body (22). The nozzle (28) is integrally formed with the inner body (22). And it has an external thread (30) and an internal thread (32), the upper bottom (20) contains an opening (34), and the opening (34) surrounds the nozzle (28) with clearance; A clamping plate (36) has an internal thread (38), and the internal thread (38) can be screwed to the external thread (30) of the nozzle (28), thereby clamping the upper bottom (38) at its opening edge. 20); A thread lock cooperates with the external thread (30) of the nozzle (28) and the internal thread (38) of the clamping plate (36) and is adapted to prevent the clamping plate (36) and the nozzle (28) from accidentally coming together relaxation; A body joint (26) supports a dip tube (25) and has an internal thread (48) and an external thread (46) that can be threaded to the internal thread (32) of the nozzle (28); and A sealing plug (56) has an external thread (58) that can be threaded into the internal thread (48) of the pipe joint (26) and close the latter in a liquid-tight seal. The container according to claim 1, characterized in that: the thread lock includes: at least a first braking element (40) located at the nozzle (28); and at least a second braking element (42) located at the clamp. The side of the control plate (36) facing the nozzle (28); Wherein, when the internal thread (38) of the clamping plate (36) is threaded with the external thread (30) of the nozzle (28), the first braking element (40) and the second braking element (42) are bolted to each other. Lock to prevent loosening of threaded connections. The container according to claim 2, characterized in that the first braking element (40) is integrally formed with the inner body (22). The container according to claim 3, characterized in that the first braking element is formed as a braking cam (40) on the cylindrical shaft at the bottom of the external thread (30) of the nozzle (28), and is located on the clamping plate (36) The second braking element is formed as a locking cam (42) on the lower circumference of the internal thread (38) of the clamping plate (36). Container according to any of the previous claims, characterized in that at least the rigid upper bottom (20) is made of conductive plastic. The container according to any one of the previous claims, characterized in that: an electrically insulating sealing ring (70) is arranged between the pipe joint (26) and the nozzle (28), the pipe joint (26) ) is made of conductive plastic and includes a conductive contact element (50, 76, 78), which is electrically conductively connected to the clamping plate (36). The container according to claim 6, characterized in that: an anti-rotation lock is provided to cooperate with the contact element (50, 76, 78), the tube joint (26) and the clamping plate (36), suitable for To prevent relative rotation of the pipe joint (26) and the clamping plate (36). The container according to claim 7, characterized in that the contact element is configured as a contact piece (76, 78), which can be fixed to the upper side of the clamping plate (36) through a conductive fastening element (80). The container according to claim 7, characterized in that: the anti-rotation lock includes: The first braking means (52) consists in the contact element being formed as a contact ring (50); and The second braking means (54) is located on the pipe body joint (26); Wherein, when the contact ring (50) is clamped between the sealing plug (56) and the tube joint (26), the first braking means (52) and the second braking means (54) are bolted to each other. Lock to prevent the contact ring (50) from rotating relative to the pipe joint (26). The container according to claim 9, characterized in that the anti-rotation lock has a locking piece (78) extending radially from the contact ring (76), and the locking piece (78) can be engaged with the tube body The component (26) is screwed to the nozzle (28) and then fixed to the edge area of the clamping plate (36) to prevent the pipe joint (26) from rotating relative to the clamping plate (36). Container according to claim 9, characterized in that the contact ring (50) contains a radially outwardly directed contact arm (60) on its circumference, the contact arm (60) having a third braking means (66), which The clamping plate (36) cooperates with the fourth braking means (64) to prevent the pipe joint (26) from rotating relative to the clamping plate (36). The container according to claim 11, characterized in that the third braking means on the contact arm (60) has a braking element (66) on the clamping disc (36) and a braking cam on the fourth braking means. (64) clearance fit between. The container according to any of the previous claims, characterized in that the sealing plug (56) is made of conductive plastic.