Packing protective sleeve for high-pressure primary machine in synthetic resin factory

Abstract

The utility model provides a synthetic resin factory high-pressure primary machine packing protective sleeve which comprises a piston rod tail end and a tail end screw head, the tail end screw head is installed on the left side of the piston rod tail end, a front section sleeve is arranged on the left side of the tail end screw head, a conical connector is installed on the left side of the front section sleeve, and a rear section sleeve is arranged on the left side of the conical connector. Threads are arranged on the outer wall of the left end of the rear-section sleeve, the outer wall of the conical connector and the outer wall of the tail-end screw head, the diameter length of the left end of the conical connector is smaller than that of the right end of the conical connector, the diameter length of the left end of the rear-section sleeve is smaller than that of the right end of the rear-section sleeve, and inner screw grooves are formed in the inner wall of the rear-section sleeve and the inner wall of the front-section sleeve. Compared with the prior art, the packing protective sleeve has the advantages that the packing protective sleeve is provided with the front section sleeve, the rear section sleeve, the threads, the inner threaded groove and the conical connector, packing is protected during mounting or dismounting, the front section sleeve and the rear section sleeve can be perfectly matched due to the design of the conical connector, and damage of gaps to the packing is reduced.

Description

Technical Field

[0001] The utility model belongs to the technical field of cylinder piston rods in synthetic resin plants, in particular to a packing protection sleeve for a high-pressure primary machine in a synthetic resin plant. Background Art

[0002] The 1st to 3rd level cylinders of the high-pressure primary machine (C1) of the synthetic resin plant are the low-pressure section, and the 4th to 6th level cylinders are the high-pressure section. The low-pressure section adopts a piston structure, and the high-pressure section is a plunger structure. The piston rod packing of the low-pressure section is made of polytetrafluoroethylene. Two groups are installed in each packing box, in the form of a three-petal bevel, which plays a sealing role. The piston rod packing of the high-pressure section is made of Babbitt alloy. Each group of packing is composed of three-petal rings and six-petal rings. A clamping spring is used to make each sealing ring contact with the piston rod to achieve a sealing effect. When the piston is installed, the packing inside the middle body must first be penetrated from the direction of the cylinder. The front section of the piston has a thread connected to the crosshead. When passing through the packing, once the piston rod shakes or the height of the piston changes, the piston rod end face will touch the packing, or the piston rod thread will scratch the packing, especially the packing made of polytetrafluoroethylene. Once a bump or collision occurs, it is easy to cause damage or deformation, resulting in sealing leakage;

[0003] In the production cycle of large compressor units, the sealing integrity of the cylinder is the key to the long-term operation of the compressor. The structure of the cylinder is a double-acting cylinder, which means that the gas is compressed when pushing or pulling, so the seal on the piston head only acts on the volume change during pushing and pulling. The piston rod side also needs to be sealed when the piston rod reciprocates. The packing is used to seal between the cylinder and the piston rod. During the operation of the cylinder, the piston rod and the packing are in contact and move relative to each other. At the same time, the contact surface needs to be intact to ensure the sealing of the cylinder. Due to the high pressure of the compressor, the tiny scratches on the packing will be infinitely magnified during operation, and the packing will soon fail. During the installation process, As the piston and piston rod are of large mass, and the packing cannot be guaranteed to be in the exact center due to gravity and other factors, the thread at the screw head at the end of the piston rod will inevitably rub against the packing, and severe collision will occur, causing damage or serious deformation of the packing sealing surface. The previous measures of using waterproof tape can only absorb a small amount of energy, and it still cannot provide good protection when the force is large. When the packing sags too much, it still needs to be picked up manually with tools, and the tools and packing will cause scratches. The original technical solution has disadvantages such as long installation time and inadequate quality control. In order to solve these shortcomings, we have now developed a packing protection cover for the high-pressure primary machine of the synthetic resin plant. Utility Model Content

[0004] In view of the deficiencies in the prior art, the utility model aims to provide a packing protection sleeve for a high-pressure primary machine of a synthetic resin plant, so as to solve the problems raised in the above-mentioned background technology.

[0005] The utility model is realized by the following technical scheme: a packing protection sleeve of a high-pressure primary machine of a synthetic resin plant is installed at the end of a piston rod, a terminal screw head is arranged at the end of the piston rod, and a front sleeve is arranged on the left side of the terminal screw head;

[0006] A conical interface is installed on the left side of the front sleeve, a rear sleeve is arranged on the left side of the conical interface, and threads are arranged on the outer wall of the left end of the rear sleeve, the outer wall of the conical interface and the outer wall of the terminal screw head;

[0007] The diameter length of the left end of the conical interface is smaller than the diameter length of the right end, the diameter length of the left end of the rear sleeve is smaller than the diameter length of the right end, the inner wall of the rear sleeve and the inner wall of the front sleeve are both provided with internal screw grooves, the left end of the rear sleeve is a conical structure, and the cross-section of the conical interface is circular. Taking into account the situation of the seasoning falling due to its own weight, the left end of the rear sleeve is designed to be conical, so that the filler can be slid to the center during installation. For safety reasons, the conical interface on the top is changed to a circular shape to ensure the safety of construction workers.

[0008] As a preferred embodiment, three positioning rods are arranged on the left side of the rear section sleeve, and the left ends of the three positioning rods are connected to an embedded screw head, and the front section sleeve and the rear section sleeve are both made of stainless steel.

[0009] As a preferred embodiment, a cross groove is provided in the middle of the left side of each embedded screw head, a connecting screw rod is provided on the left side of each of the three embedded screw heads, and a thread is also provided on the outer wall of the right end of each positioning rod.

[0010] As a preferred embodiment, each of the linked rotary rods is provided with a cross rotary head at the right end, the cross rotary head and the linked rotary rod are integrally formed, and a round outer shell is provided on the left side of the three linked rotary rods.

[0011] As a preferred embodiment, a driving gear is arranged in the middle of the circular shell, and three driven gears are arranged outside the driving gear.

[0012] As a preferred embodiment, a rocker is provided in the middle of the left side of the circular outer shell, the right end of the rocker penetrates into the circular outer shell and is connected to the middle of the driving gear, the driving gear and the three driven gears are meshed with each other, the rocker can drive the three driven gears to rotate through the driving gear, and at the same time, the three driven gears can drive the three linked rotating rods to rotate.

[0013] As a preferred embodiment, the left ends of the three linked rotating rods are inserted into the circular outer shell and respectively connected to the middle of the three driven gears. Three fixed connecting holes are opened on the outer side of the left side of the end of the piston rod, and the inner wall of each fixed connecting hole is also provided with an internal thread groove.

[0014] As a preferred embodiment, three positioning holes are formed on the outer side of the right side surface of the front section sleeve and the outer side of the right side surface of the rear section sleeve, and three docking holes are formed on the left side of the rear section sleeve. The positions of the three docking holes are symmetrical to the positions of the three positioning holes at the rear section sleeve.

[0015] After adopting the above technical solution, the beneficial effects of the utility model are: by setting the front sleeve, the rear sleeve, the thread, the inner thread groove and the tapered interface, the purpose of protecting the packing during installation or removal is achieved, and at the same time, the design of the tapered interface enables the front sleeve and the rear sleeve to fit perfectly, reducing the damage of the gap to the packing;

[0016] By arranging the positioning rods, positioning holes, embedded rotary heads, linked rotary rods, round housings, rocking arms, driving gears, driven gears, cross grooves and fixed connecting holes, the three linked rotary rods can be rotated simultaneously so that the three positioning rods pass through the three positioning holes and are connected to the fixed connecting holes respectively, so that the front section sleeve and the rear section sleeve will not loosen after installation, thereby improving the stability of the front section sleeve and the rear section sleeve after installation. BRIEF DESCRIPTION OF THE DRAWINGS

[0017] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative labor.

[0018] Figure 1 The utility model is a schematic diagram of the overall structure of a packing protection sleeve of a high-pressure primary machine in a synthetic resin plant.

[0019] Figure 2 It is a schematic diagram of the left view of the middle and rear section sleeve of the packing protection sleeve of the high-pressure primary machine of the synthetic resin plant according to the utility model.

[0020] Figure 3 It is a schematic diagram of the left view of the interior of the circular shell of the packing protection sleeve of the high-pressure primary machine of the synthetic resin plant of the utility model.

[0021] Figure 4 It is a schematic diagram of the left view of the end of the piston rod in the packing protection sleeve of the high-pressure primary machine of the synthetic resin plant of the utility model.

[0022] In the figure, 100-piston rod end, 200-end screw head, 300-front sleeve, 400-conical interface, 500-rear sleeve, 600-positioning hole, 700-positioning rod, 800-embedded rotary head, 900-round housing, 110-linked rotary rod, 120-rocker, 130-docking hole, 140-driving gear, 150-driven gear, 160-fixed connecting hole. DETAILED DESCRIPTION

[0023] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0024] See also Figures 1 to 4 The utility model provides a technical solution: a packing protection sleeve of a high-pressure primary machine of a synthetic resin plant is installed at the end 100 of a piston rod, the end 100 of the piston rod is provided with an end screw head 200, and a front sleeve 300 is provided on the left side of the end screw head 200;

[0025] A conical interface 400 is installed on the left side of the front sleeve 300, and a rear sleeve 500 is arranged on the left side of the conical interface 400. The outer wall of the left end of the rear sleeve 500, the outer wall of the conical interface 400 and the outer wall of the terminal screw head 200 are all provided with threads;

[0026] The diameter length of the left end of the conical interface 400 is smaller than the diameter length of the right end, and the diameter length of the left end of the rear section sleeve 500 is smaller than the diameter length of the right end. The inner wall of the rear section sleeve 500 and the inner wall of the front section sleeve 300 are both provided with internal thread grooves, the left end of the rear section sleeve 500 is a conical structure, and the cross-section of the conical interface 400 is circular.

[0027] Example 1: Please refer to Figure 1 , Figure 2 as well as Figure 4 When in use, firstly, the front sleeve 300 is screwed together with the terminal screw head 200 through threads, and the front sleeve 300 is tightened so that the right side of the front sleeve 300 is closely fitted with the left side of the piston rod terminal 100, and at the same time, the three positioning holes 600 on the right side thereof are symmetrical with the three fixing holes 160 on the left side of the piston rod terminal 100. Next, the right side of the rear sleeve 500 is screwed together with the conical interface 400 through threads, and while tightening the rear sleeve 500, the positions of the three positioning holes 600 on the right side of the rear sleeve 500 are symmetrical with the positions of the three positioning holes 600 at the front sleeve 300, and at the same time, the inner wall of the rear sleeve 500 can be screwed together with the left end of the terminal screw head 200 through threads;

[0028] By adding a protective sleeve consisting of a front sleeve 300 and a rear sleeve 500 on the threaded head 100 of the piston rod end, the purpose of protecting the packing during installation or removal can be achieved. First, the thread of the screw head 100 of the piston rod end is relatively long, and the interruption space of the compressor is relatively small. If the protective sleeve is too short, it cannot completely cover the thread to protect the packing. If it is too long, the interruption space after the packing is too small and the protective sleeve cannot be taken out. Therefore, the protective sleeve is designed into two sections. In order to reduce the installation time, the outer side of the protective sleeve is not made into a full thread, but a thread is made on the left end of the rear sleeve 500 to facilitate For the purpose of fixing, and at the same time greatly reducing the installation time of the protective cover, the two-section design requires the front cover 300 to be connected with the rear cover 500, so a conical interface 400 is designed and manufactured at the interface, so that the front cover 300 and the rear cover 500 can fit perfectly after being connected in place, reducing the damage of the gap to the filler, and finally taking into account the situation of the seasoning falling due to its own weight, the left end of the rear cover 500 is designed to be conical, so that the filler can be slid to the center during installation, and for safety reasons, the top conical interface 400 is changed to a circular shape to ensure the safety of the construction workers.

[0029] Three positioning rods 700 are arranged on the left side of the rear section sleeve 500. The left ends of the three positioning rods 700 are all connected with an embedded screw head 800. The front section sleeve 300 and the rear section sleeve 500 are both made of stainless steel.

[0030] A cross groove is provided in the middle of the left side of each embedded screw head 800. A linkage screw rod 110 is provided on the left side of each of the three embedded screw heads 800. The outer wall of the right end of each positioning rod 700 is also provided with a thread.

[0031] A cross head is disposed at the right end of each linkage rotating rod 110 . The cross head and the linkage rotating rod 110 are formed as one piece. A round housing 900 is disposed on the left side of the three linkage rotating rods 110 .

[0032] A driving gear 140 is disposed in the middle of the circular housing 900 , and three driven gears 150 are disposed outside the driving gear 140 .

[0033] A rocker 120 is disposed in the middle of the left side of the circular housing 900 . The right end of the rocker 120 penetrates into the middle of the circular housing 900 and is connected to the driving gear 140 . The driving gear 140 and the three driven gears 150 are meshed with each other.

[0034] The left ends of the three linked rotating rods 110 are inserted into the circular outer shell 900 and respectively connected to the middle of the three driven gears 150. Three fixing holes 160 are opened on the outer side of the left side of the piston rod end 100, and the inner wall of each fixing hole 160 is also provided with an inner thread groove.

[0035] Three positioning holes 600 are formed on the outer right side of the front sleeve 300 and the outer right side of the rear sleeve 500. Three docking holes 130 are formed on the left side of the rear sleeve 500. The positions of the three docking holes 130 are symmetrical to the positions of the three positioning holes 600 at the rear sleeve 500.

[0036] Example 2: Please refer to Figures 1 to 4 According to the further description of the first embodiment, after the protective cover is installed, three positioning rods 700 are used to pass through the three positioning holes 600 at the rear section cover 500 and the front section cover 300 respectively, and the right ends of the three positioning rods 700 are inserted into the three fixed holes 160, and then the round housing 900 is picked up, and the cross heads at the right ends of the three linked rotating rods 110 are respectively inserted into the cross grooves at the three embedded rotating heads 800. Next, the rocker 120 is rotated clockwise, and the rocker 120 can drive the three driven gears 150 to rotate through the driving gear 140, and at the same time, the three driven gears 1 50 can simultaneously drive the three embedded screw heads 800 to rotate through the three linked screw rods 110, and the embedded screw heads 800 can drive the positioning rod 700 to rotate while rotating, so that the right ends of the three positioning rods 700 are respectively screwed into the three fixed holes 160, so that the embedded screw heads 800 are rotated and pushed while being embedded in the docking holes 130, thereby completing the installation of the positioning rods 700. Under the restriction of the positioning rods 700, the front section sleeve 300 and the rear section sleeve 500 will not loosen after the installation is completed, thereby improving the stability of the front section sleeve 300 and the rear section sleeve 500 after installation.

[0037] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A packing protection sleeve of a high-pressure primary machine of a synthetic resin plant is installed at the end (100) of a piston rod, and the end (100) of the piston rod is provided with an end screw head (200), characterized in that: A front sleeve (300) is arranged on the left side of the terminal screw head (200); A conical interface (400) is installed on the left side of the front sleeve (300), a rear sleeve (500) is arranged on the left side of the conical interface (400), and threads are arranged on the left end outer wall of the rear sleeve (500), the outer wall of the conical interface (400) and the outer wall of the terminal screw head (200); The diameter length of the left end of the conical interface (400) is smaller than the diameter length of the right end thereof, the diameter length of the left end of the rear section sleeve (500) is smaller than the diameter length of the right end thereof, the inner wall of the rear section sleeve (500) and the inner wall of the front section sleeve (300) are both provided with internal screw grooves, the left end of the rear section sleeve (500) is a conical structure, and the cross section of the conical interface (400) is circular.

2. The packing protective sleeve for the high-pressure primary machine of a synthetic resin plant as claimed in claim 1, characterized in that: Three positioning rods (700) are arranged on the left side of the rear section sleeve (500), and the left ends of the three positioning rods (700) are all connected to an embedded screw head (800). The front section sleeve (300) and the rear section sleeve (500) are both made of stainless steel.

3. The packing protective sleeve for the high-pressure primary machine of a synthetic resin plant as claimed in claim 2, characterized in that: A cross groove is provided in the middle of the left side of each embedded screw head (800), and a linked screw rod (110) is provided on the left side of each of the three embedded screw heads (800). The outer wall of the right end of each positioning rod (700) is also provided with a thread.

4. The packing protective sleeve for the high-pressure primary machine of a synthetic resin plant as claimed in claim 3, characterized in that: A cross head is provided at the right end of each of the linked rotating rods (110), and the cross head and the linked rotating rod (110) are integrally formed. A round outer shell (900) is provided on the left side of the three linked rotating rods (110).

5. The packing protection sleeve for the high-pressure primary machine of a synthetic resin plant as claimed in claim 4, characterized in that: A driving gear (140) is arranged in the middle of the circular housing (900), and three driven gears (150) are arranged outside the driving gear (140).

6. The packing protection sleeve for the high-pressure primary machine of a synthetic resin plant as claimed in claim 5, characterized in that: A rocker (120) is arranged in the middle of the left side of the circular housing (900); the right end of the rocker (120) penetrates into the circular housing (900) and is connected to the middle of the driving gear (140); the driving gear (140) and the three driven gears (150) are meshed with each other.

7. The packing protection sleeve for the high-pressure primary machine of a synthetic resin plant as claimed in claim 6, characterized in that: The left ends of the three linked rotating rods (110) are inserted into the circular outer shell (900) and respectively connected to the middle of the three driven gears (150). Three fixing holes (160) are opened on the outer side of the left side of the piston rod end (100), and the inner wall of each fixing hole (160) is also provided with an internal thread groove.

8. The packing protective sleeve for the high-pressure primary machine of a synthetic resin plant as claimed in claim 1, characterized in that: Three positioning holes (600) are provided on the outer side of the right side surface of the front section sleeve (300) and the outer side of the right side surface of the rear section sleeve (500), and three docking holes (130) are provided on the left side surface of the rear section sleeve (500). The positions of the three docking holes (130) are symmetrical to the positions of the three positioning holes (600) at the rear section sleeve (500).

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