Propylene compressor piston rod

Abstract

This utility model belongs to the technical field of propylene compressors, and in particular, a piston rod for a propylene compressor. It includes a locking nut and a piston rod for fastening the propylene compressor unit. The locking nut is locked onto the piston rod. The piston rod has an external thread on one end near the locking nut that engages with the locking nut. The piston rod also includes: multiple grooves arranged circumferentially around the locking nut, each groove having an internal thread; and locking braces, which are arranged along the circumferential wall of the locking nut, corresponding one-to-one with the multiple grooves. This utility model has a simple structure. By turning a locking screw with a 30° inclination angle, it moves and engages with the piston rod's thread through an F-shaped thread, achieving a locking effect and preventing it from falling off under impact, making it convenient for users.

Description

Technical Field

[0001] This utility model relates to the field of propylene compressor technology, and in particular to a piston rod for a propylene compressor. Background Technology

[0002] In the propylene unloading system, a compressor is used to extract propylene gas and pressurize it in the tank truck. This allows the liquid propylene in the tank truck to flow through pipelines to the spherical tank under pressure difference. The propylene compressor plays a crucial role in this process, and its safe and stable operation is paramount. Furthermore, the propylene compressor is a reciprocating compressor, and due to the inherent characteristics of reciprocating compressors, the overall unit vibration is greater than that of other types of machinery.

[0003] However, during the use of reciprocating compressors, the screws and nuts fastened on the unit are easily loosened by vibration, especially the locking nuts, which are constantly subjected to the impact of reciprocating forces and are more likely to loosen.

[0004] To address this problem, we propose a piston rod for a propylene compressor. Utility Model Content

[0005] The purpose of this invention is to solve the problem that during the use of reciprocating compressors, the screws and nuts fastened on the unit are easily loosened by vibration, especially the locking nuts, which are constantly subjected to the impact of reciprocating forces and are more likely to loosen. Therefore, this invention proposes a piston rod for a propylene compressor.

[0006] To achieve the above objectives, the present invention adopts the following technical solution: A piston rod for a propylene compressor includes a locking nut and a piston rod for fastening a propylene compressor unit. The locking nut is locked onto the piston rod, and the piston rod has an external thread on one end near the locking nut that engages with the locking nut. The piston rod for the propylene compressor further includes: The groove, which is provided in multiple ways, is arranged circumferentially along the locking nut, and the groove is provided with internal threads. The locking copper is arranged along the periphery of the locking nut and corresponds to a plurality of the grooves. The grooves are detachably provided with locking screws for locking the piston rod. The locking screws have an F-type thread with the same thread size and shape as the piston rod and are not subject to the axial load of the external thread on the piston rod at one end near the inner ring of the locking nut. An internal hex wrench is provided, which can be inserted into a locking screw near one end of the groove. The internal hex wrench can drive the locking screw to lock or loosen the piston rod.

[0007] Furthermore, the threads on the outer wall of the locking screw have the same depth as the internal threads in the groove.

[0008] Furthermore, the diameter of one end of the locking screw is larger than the diameter of the F-type threaded end of the locking screw.

[0009] Furthermore, the locking screw is inclined, and the inclination angle between the locking screw and the piston rod thread is 30°.

[0010] Furthermore, the locking screw has an actuating groove on one end away from the F-type thread for inserting the internal hex wrench.

[0011] Furthermore, the end face of the internal hex wrench is a hexagonal shape with the same size and shape as the actuating groove.

[0012] Furthermore, the hex wrench is L-shaped, and both ends of the L-shape are adapted to drive the locking screw to rotate via a chute.

[0013] Furthermore, the diameter of the groove near the inner ring of the locking nut is larger than the diameter of the outer ring of the groove.

[0014] Compared with the prior art, the advantages of this utility model are: 1. This solution first achieves basic locking by fully locking the piston rod thread with the locking nut, and then uses the locking screw to push the locking copper (utilizing its flexibility) so that the F-type thread of the screw tightly "holds" the piston rod thread, forming a double fixing structure of "thread locking + copper holding". This generates huge friction and radial contraction force, effectively preventing the connection from loosening due to vibration, load changes, etc. during use, and ensuring long-term stable connection. 2. When disassembling this solution, first use an Allen wrench to turn the knob in the opposite direction to tighten the screw, so that it moves along the groove and gets out of the groove (relieving the "clamping" fixation), and then turn the knob in the opposite direction to tighten the nut to get it out of the piston rod. No special or large tools are needed, the operation logic is simple, and it is easy for staff to master quickly. Attached Figure Description

[0015] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0016] Figure 1 This is a schematic diagram of the piston rod of the propylene compressor proposed in this utility model; Figure 2This is a side view of the piston rod of the propylene compressor proposed in this utility model. Figure 3 This is a schematic diagram of part A of the piston rod of the propylene compressor proposed in this utility model; Figure 4 This is a schematic diagram of the internal hexagonal wrench structure of the piston rod of the propylene compressor proposed in this utility model.

[0017] The correspondence between the numbers in the attached diagram is as follows: 1-Locking nut; 101-Groove; 102-Locking brass; 103-Locking screw; 104-F-type threaded belly; 2-Piston rod; 3-Internal hex wrench. Detailed Implementation

[0018] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0019] Specifically, refer to Figures 1-4 A piston rod for a propylene compressor includes a locking nut 1 and a piston rod 2 for fastening the propylene compressor unit. The locking nut 1 is locked onto the piston rod 2. The piston rod 2 has an external thread on one end near the locking nut 1 that engages with the locking nut 1. The piston rod for a propylene compressor also includes: The groove 101, there are multiple grooves 101, arranged around the locking nut 1, and the groove 101 is provided with internal thread; Locking copper 102 is provided along the circumference of locking nut 1 and is respectively provided with multiple grooves 101. Locking copper 102 is flexible. The diameter of the groove 101 near the inner ring of locking nut 1 is larger than the diameter of the outer ring of groove 101. Locking screw 103 for locking piston rod 2 is detachably provided in groove 101. Locking screw 103 has an F-type thread 104 on one end near the inner ring of locking nut 1, which is the same as the thread size and shape of piston rod 2 and is not subject to axial load on the external thread of piston rod 2. An internal hex wrench can be inserted into a locking screw 103 near one end of the groove 101. The internal hex wrench can drive the locking screw 103 to lock or loosen the piston rod 2.

[0020] The following is a supplementary explanation based on the above structure: After the locking nut 1 and piston rod 2 are screwed together to achieve initial locking, the locking screw 103 is placed in the groove 101. The locking screw 103 is turned (forward or backward) by using an Allen wrench, so that the locking screw 103 is close to the external thread of the piston rod 2 along the groove 101. This causes a huge frictional force and contraction force to be formed between the F-type thread 104 and the external thread of the piston rod 2. The F-type thread 104 does not bear the axial load acting on the thread, thereby achieving the locking effect.

[0021] like Figure 1 , Figure 2 and Figure 3 As shown, in this embodiment, the thread on the outer wall of the locking screw 103 has the same depth as the internal thread in the groove 101. The diameter of one end of the locking screw 103 is larger than the diameter of the F-type thread 104 end of the locking screw 103. The thread on the locking screw 103 and the thread in the groove 101 have the same depth, which can accurately make the locking screw 103 bring a locking force to the thread on the piston rod 2 while limiting the depth of the locking screw 103 entering the groove 101.

[0022] like Figure 2 and Figure 3 As shown, in this embodiment, the locking screw 103 is inclined, and the inclination angle between the locking screw 103 and the thread of the piston rod 2 is 30°. The 30° inclination between the locking screw and the thread of the piston rod 2 is different from the thread of a normal all-metal nut, which is parallel to the axis. This special setting makes the F-type thread 104 not bear the axial load acting on the thread. It acts like a spring that is always holding the bolt, applying a continuous radial (perpendicular to the axis) compressive force. This compressive force greatly increases the frictional resistance between the threads, thereby effectively preventing the locking nut 1 from rotating and loosening due to vibration, impact or temperature change.

[0023] like Figure 2 , Figure 3 and Figure 4 As shown, in this embodiment, the locking screw 103 has an actuating groove for inserting an internal hex wrench on one end away from the F-type toothed belly 104. The end face of the internal hex wrench is a hexagonal shape with the same size and shape as the actuating groove. The internal hex wrench is L-shaped, and both ends of the L-shape are suitable for driving the locking screw 103 to rotate through the actuating groove. The internal hex wrench is provided to facilitate the operator to turn the locking screw 103, but a larger torque than that of a regular nut is required to overcome the friction of the locking nut 1.

[0024] The implementation principle of the piston rod of the propylene compressor in this application embodiment is as follows: First, the piston rod 2 is passed through the compressor and screwed into the threaded end of the piston rod 2 by the locking nut 1. The locking nut 1 is then tightened until the internal and external threads of the two are completely stopped.

[0025] Next, the locking screw 103 is turned with an Allen wrench, causing it to move closer to the inner ring of the locking nut 1 through the groove 101. Due to the flexibility of the locking bran 102, the F-shaped thread 104 of the locking screw 103 tightly "grips" the thread of the piston rod 2 through the locking bran 102, generating huge friction and radial contraction force. Once installed in place, the metal part (body) of the locking nut 1 normally bears all the axial load (i.e., the force along the axis of the piston rod 2, such as the clamping force of the fastened parts) through its threads. This load is transmitted through the metal-to-metal threaded contact surface, thereby achieving the locking effect.

[0026] When disassembly is required, first use an Allen wrench to turn the locking screw 103 in the opposite direction, causing the locking screw 103 to move along the groove 101. Subsequently, the F-shaped thread 104 of the locking screw 103 moves away from the piston rod 2 until the locking screw 103 is disengaged from the groove 101. Then, turn the locking nut 1 in the opposite direction to disengage it from one end of the piston rod 2, thereby removing the piston rod 2 from the compressor and achieving the disassembly effect.

[0027] All structures in this application can be customized in terms of material and length according to actual usage. The attached drawings are schematic structural diagrams, and the actual dimensions can be adjusted accordingly.

[0028] The above description is only a preferred embodiment of this practice, but the scope of protection of this embodiment is not limited thereto. Any equivalent substitutions or changes made by those skilled in the art within the scope of the technology disclosed in this embodiment, based on the technical solution and the inventive concept of this embodiment, should be covered within the scope of protection of this embodiment.

Claims

1. A piston rod for a propylene compressor, comprising a locking nut for fastening a propylene compressor unit and a piston rod, wherein the locking nut is locked onto the piston rod, and the piston rod has an external thread on one end near the locking nut that engages with the locking nut, characterized in that, The piston rod of the propylene compressor piston also includes: The groove, which is provided in multiple ways, is arranged circumferentially along the locking nut, and the groove is provided with internal threads. The locking copper is arranged along the periphery of the locking nut and corresponds to a plurality of the grooves. The grooves are detachably provided with locking screws for locking the piston rod. The locking screws have an F-type thread with the same thread size and shape as the piston rod and are not subject to the axial load of the external thread on the piston rod at one end near the inner ring of the locking nut. An internal hex wrench is provided, which can be inserted into a locking screw near one end of the groove. The internal hex wrench can drive the locking screw to lock or loosen the piston rod.

2. The piston rod of the propylene compressor according to claim 1, characterized in that, The threads on the outer wall of the locking screw have the same depth as the internal threads in the groove.

3. The piston rod of the propylene compressor according to claim 2, characterized in that, The diameter of one end of the locking screw is larger than the diameter of the F-type threaded end of the locking screw.

4. The piston rod of the propylene compressor according to claim 1, characterized in that, The locking screw is inclined, and the inclination angle between the locking screw and the piston rod thread is 30°.

5. The piston rod of the propylene compressor according to claim 2, characterized in that, The locking screw has a slot on one end away from the F-type thread for inserting the internal hex wrench.

6. The piston rod of the propylene compressor according to claim 5, characterized in that, The end face of the internal hex wrench is hexagonal in shape and has the same size and shape as the actuating groove.

7. The piston rod of the propylene compressor according to claim 5, characterized in that, The hex wrench is L-shaped, and both ends of the L-shape are used to drive the locking screw to rotate via the actuating groove.

8. The piston rod of the propylene compressor according to claim 1, characterized in that, The diameter of the groove near the inner ring of the locking nut is larger than the diameter of the outer ring of the groove.

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