Gas meter automatic pressure sealing positioning lifting mechanism

Abstract

The present invention discloses an automatic pressure-sealing, positioning and lifting mechanism for a gas meter, comprising an elastic telescopic member composed of a pile head, a compression spring, a screw rod and a screw plug; the pile head body is integrally provided with a shoulder I, the pile head is a hollow structure with an opening at the bottom, and an internal thread is provided on the inner side of the hollow; the screw plug is provided with a central hole for facilitating the free extension and retraction of the screw rod; the screw rod top is integrally provided with a shoulder II, the upper end face of the shoulder II contacts one end of the compression spring, and the circumferential surface of the shoulder II cooperates with the inner surface of the pile head to form a moving pair I. The automatic pressure-sealing, positioning and lifting mechanism for a gas meter, through the coordinated use of the pile head, the compression spring, the screw rod and the screw plug, the technical solution of the present application utilizes a coherent and compact structure, and solves the problem that the traditional lifting device cannot have a certain elastic buffering property between the joint of the gas meter on the basis of continuous close contact with the joint of the gas meter when in use.

Description

Technical Field

[0001] The invention belongs to the field of gas meters, and in particular relates to an automatic pressure-sealing, positioning and lifting mechanism for a gas meter. Background Art

[0002] A gas meter is an instrument used to record the amount of gas used. The structure of the gas meter itself consists of an upper body and a lower body. Two joints are fixed on the top of the upper body, and the upper body and the lower body are sealed by a sealing ring. At present, during the process of sealing, the two joints of the upper body need to be used for positioning, so as to complete the positioning and lifting of the gas meter in and out of the mold cavity, sealing, and demolding.

[0003] However, there are some drawbacks in the current "gas meter entering and exiting the mold cavity, pressing and sealing, and positioning and lifting of demolding and parting", which are now specifically explained as follows:

[0004] 1. After the gas meter enters the mold cavity, its height is fixed and the lifting position is fixed at the same time. However, the joint heights of different meter types are different, which directly leads to different lifting heights required for different meter types.

[0005] 2. When the gas meter is sealed, the sealing ring is squeezed and curled, and its height is reduced (about 4mm). Due to the high pressure, it is inconvenient for the pile head to rigidly contact the gas meter joint at this time, otherwise it will cause the shell to be squeezed and deformed.

[0006] 3. During the demoulding process after the pressure seal is completed, the gas meter will rebound a certain distance, and then the demoulding action will be performed. At this time, the pile head needs to be close to the gas meter joint, otherwise the gas meter will be pulled off, resulting in shell damage in the subsequent process.

[0007] Based on this, the applicant considered designing a positioning and lifting device that can achieve non-rigid contact and good contact with the end face of the gas meter joint in the above three states. Summary of the invention

[0008] In view of this, an object of the present invention is to provide an automatic pressing, sealing, positioning and lifting mechanism for a gas meter, so as to solve the problem that the conventional lifting device in the prior art cannot ensure non-rigid contact while maintaining close contact with the end face of the gas meter joint when the gas meter enters the mold, the sealing ring is pressed and sealed, and the mold is demolded.

[0009] One of the present inventions is achieved through the following technical solutions: a gas meter automatic pressure sealing positioning jacking mechanism comprises a pile head, a compression spring, a screw rod and a screw plug;

[0010] The pile head body is integrally provided with a shoulder I, the pile head is a hollow structure with an opening at the bottom, and the inner wall of the opening is provided with an internal thread;

[0011] The screw plug is provided with a central hole which allows the screw rod to move freely.

[0012] The top of the screw rod is integrally provided with a shoulder II, the upper end surface of the shoulder II contacts one end of the compression spring, and the circumferential surface of the shoulder II matches the opening of the pile head to form a moving pair I;

[0013] The screw plug passes through the center hole of the screw rod and contacts the bottom of the shoulder II, and is threadedly tightened on the opening of the pile head. The other end of the compression spring elastically contacts the top wall of the opening, and the lower part of the screw rod cooperates with the circumferential surface of the center hole of the screw plug to form a moving pair II.

[0014] Furthermore, the top of the pile head is tapered.

[0015] Furthermore, an adjustment hole is provided on the thread plug.

[0016] Furthermore, two adjusting holes are provided and are symmetrically distributed on the plane of the screw plug.

[0017] Furthermore, a force-bearing surface is provided on the screw rod.

[0018] Furthermore, the force-bearing surfaces are located on both sides of the middle part of the screw rod.

[0019] Furthermore, the outer surface of the compression spring is painted with anti-rust paint.

[0020] The second aspect of the present invention is achieved through the following technical solution: an assembly device of a lifting mechanism according to any one of claims 1 to 7, comprising a rotating handle, wherein the rotating handle is provided with a rotating plug for freely rotating the screw plug.

[0021] The third aspect of the present invention is achieved through the following technical solution: a gas meter pressure seal positioning structure, including a gas meter, on which a joint is provided, and the joint abuts against the pile head of the jacking mechanism described in any one of claims 1-7.

[0022] The fourth aspect of the present invention is achieved through the following technical solution: a gas meter pressure seal positioning method, comprising:

[0023] 1). The lifting mechanism is connected to the gas meter;

[0024] The pile head is connected to the interface of the gas meter;

[0025] 2). The lifting mechanism is connected to the cylinder;

[0026] ITurn the screw rod so that the screw rod thread is tightened on the inner side of the top rod of the cylinder to complete the pressure seal positioning of the gas meter.

[0027] The beneficial effects of the present invention are:

[0028] The gas meter automatic pressure-sealing positioning jacking mechanism is used through the coordinated use of a pile head, a compression spring, a screw rod and a screw plug. When no external force is applied, the compression spring, under the action of force, causes relative movement of the two moving pairs, the lower end surface of the screw rod shoulder II contacts the upper surface of the screw plug, and the entire pile head is in a position with a larger length. When subjected to axial pressure, the compression spring is compressed, and the two moving pairs cause relative movement, the lower surface of the screw rod shoulder II separates from the upper surface of the screw plug, and the length of the entire pile head becomes shorter. As the pressure increases, this length gradually becomes shorter until the spring is compressed to its limit. The technical solution of the present application utilizes a coherent and compact structure to solve the problem that a traditional jacking device cannot maintain a certain elastic buffer between the joint of the gas meter and the joint of the gas meter on the basis of continuous close contact with the joint when in use.

[0029] Other advantages, objectives and features of the present invention will be described in the following description to some extent, and to some extent, will be obvious to those skilled in the art based on the following examination and study, or can be taught from the practice of the present invention. The objectives and other advantages of the present invention can be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0030] Figure 1 It is an exploded view of the present invention.

[0031] Figure 2 It is a partial three-dimensional schematic diagram of the compression spring of the present invention.

[0032] Figure 3 It is a partial three-dimensional schematic diagram of the screw rod of the present invention.

[0033] Figure 4 It is a partial three-dimensional schematic diagram of the wire plug of the present invention.

[0034] Figure 5 It is a partial three-dimensional schematic diagram of the pile head of the present invention.

[0035] Figure 6 It is a schematic diagram of the pile head, screw rod and screw plug assembly state of the present invention.

[0036] Figure 7 A three-dimensional schematic diagram of the rotating handle I of the present invention.

[0037] Figure 8 It is a schematic diagram of a rotating handle II of the present invention.

[0038] Fig. 9 The gas meter structure diagram of the present invention is

[0039] In the figure: 1. screw plug; 2. screw rod; 3. shoulder I; 4. pile head; 5. compression spring; 6. force-bearing surface; 7. shoulder II; 8. center hole; 9. adjustment hole; 10. rotating handle; 11. opening. DETAILED DESCRIPTION

[0040] The embodiments of the present invention are further described in detail below with reference to the accompanying drawings.

[0041] In specific implementation, one of the embodiments of the present invention is as follows: Figures 1 to 6 As shown, the automatic pressure sealing positioning and lifting mechanism of the gas meter comprises an elastic telescopic member composed of a pile head 4, a compression spring 5, a screw rod 2 and a screw plug 1;

[0042] The pile head 4 is integrally provided with a shoulder 13, the pile head is a hollow structure with an opening at the bottom, the inner wall of the opening is provided with an internal thread, the shoulder 1 contacts the end face of the gas meter joint, and plays a limiting role, the hollow part inside the pile head provides a movement space for the screw rod, and the internal thread and the screw plug form a thread pair to limit the screw rod;

[0043] The screw plug is provided with a central hole 8 to facilitate the free movement of the screw rod;

[0044] A shoulder II is integrally provided on the top of the screw rod, the upper end surface of the shoulder II contacts one end of the compression spring, the circumferential surface of the shoulder II matches the opening of the pile head to form a moving pair I, and the lower end surface of the shoulder II contacts the screw plug and is restricted to move in the inner cavity of the pile head;

[0045] The plug passes through the center hole through the screw rod and contacts the bottom of the shoulder II, and is screwed to the opening of the pile head. The other end of the compression spring elastically contacts the top wall of the opening 11, and the lower part of the screw rod cooperates with the circumferential surface of the center hole of the plug to form a moving pair II.

[0046] The compression spring is installed in the inner cavity of the pile head, above the upper end surface of the screw rod, and the overall length of the device is adaptively adjusted according to the external axial force during operation;

[0047] It should be noted here that when the technical solution of the present application is implemented, the two sets of devices of the technical solution of the present application are installed on the top rod (cylinder), and the distance between them is the same as the distance between the two joints of the gas meter. At this time, the two sets of devices move simultaneously.

[0048] When the gas meter is transported to the specified position by the fixture (directly above the two devices, and the vertical plane formed by the axes of the two joints coincides with the vertical plane formed by the axes of the two devices), the push rod moves upward, and the pile head enters the joint hole of the gas meter (due to the taper as a guide, a certain deviation in the position is allowed) until the upper end face of the pile head shoulder I contacts the end face of the gas meter joint. At this time, the device still moves as a whole.

[0049] After the two end faces of the pile head contact the gas meter interface, since the position of the gas meter is fixed, the push rod still moves upward. At this time, the compression spring inside the device is compressed, and a relative movement is formed between the screw rod and the pile head, which manifests as contraction. At this time, the pile head does not move, and the screw rod moves upward until the push rod moves upward into place and the compression spring is compressed.

[0050] When the push rod moves into place, the external clamp of the gas meter is released, and the gas meter moves downward due to its own weight until the compression spring is compressed to the limit. At the same time, the push rod moves downward, and the device moves downward together with the gas meter until the gas meter seal ring contacts the mold.

[0051] After the gas meter seal ring contacts the mold, the gas meter stops moving downward, while the push rod still moves downward. The screw rod moves relative to the pile head due to the compression spring, which is manifested as the screw rod extending. At this time, the pile head does not move, and the screw rod moves downward until the push rod moves downward into place and the spring extends.

[0052] After the push rod moves into place, the mold closes and moves downward to seal the gas meter. During the sealing process, the gas meter as a whole will move slightly downward. At this time, due to the action of the compression spring, the upper end surface of the pile head is always in close contact with the gas meter joint and drives the pile head to move downward. At this time, due to the movement space between the screw rod and the pile head, the lifting force on the gas meter joint is only the reaction force of the compression spring, so it will not cause the gas meter shell to be squeezed and deformed.

[0053] After the compression seal is completed, the mold is separated, and the ejector moves upward to lift the gas meter to the specified position. The movement mode is opposite to the above and will not be repeated here.

[0054] It can be seen that in the three states of the whole process, the device can ensure close contact with the end face of the gas meter joint, and will not cause the joint to be rigidly stressed, causing damage to the gas meter shell.

[0055] One point that needs to be noted about the technical solution of the present application is that, unlike conventional jacking devices, the technical solution of the present application does not need to transmit force to the interface between the pile head and the gas meter when the screw rod is screwed into the inner side of the top rod of the cylinder. The reason is that there is no fixed contact point between the screw rod and the pile head. Therefore, the gas meter can be protected to a certain extent.

[0056] In this embodiment: the top of the pile head is tapered, and the top of the pile head has a taper, which can play a guiding role in positioning when the pile head enters the gas meter interface.

[0057] In this embodiment: an adjustment hole 9 is provided on the screw plug. The adjustment hole is provided here for the purpose of facilitating the insertion of an external force-applying device into the adjustment hole to rotate the screw plug.

[0058] In this embodiment: two adjusting holes 9 are provided and symmetrically distributed on the plane of the screw plug. Two adjusting holes are provided here to avoid the problem of falling off or loosening during the screw plug is twisted.

[0059] In this embodiment: a force-bearing surface 6 is provided on the screw rod, where an external tool (wrench) can be used, and the clamping angle of the tool can be adjusted to clamp the external tool on the force-bearing surface. The force-bearing surface is used to bear force during installation, which facilitates the screw rod to be twisted.

[0060] In this embodiment: the force-bearing surfaces are located on both sides of the middle of the screw rod, and the number and setting positions of the force-bearing surfaces are further limited here. The purpose is to turn the screw rod here so that the user's comfort is optimal.

[0061] In this embodiment: the outer surface of the compression spring is coated with anti-rust paint, and the anti-rust paint is coated here to extend the service life of the compression spring.

[0062] Embodiment 2 of the present invention:

[0063] Please see attached Figure 7 and 8 , an assembly device for a jacking mechanism according to any one of claims 1 to 7, comprising a rotating handle 10, the rotating handle being provided with a rotating plug for freely rotating a screw plug, wherein the rotating handle can be grasped by hand, and both ends of the rotating handle are inserted into the inner side of the adjustment hole, and the screw plug can be rotated freely. Figure 7 , when using the attached Figure 7 When the handle is rotated, the screw plug can still be twisted after the screw rod is screwed into the inner side of the cylinder top rod. The technical solution of this application is consistent with the attached Figure 7 The rotating handle is different from the Figure 8 The handle shown in the figure can avoid the collision between the handle and the screw rod during the twisting process when the handle is of sufficient length, but the screw plug cannot be twisted after the screw rod is screwed into the top rod of the cylinder.

[0064] Embodiment 3 of the present invention:

[0065] A gas meter compression seal positioning structure includes a gas meter. A joint is provided on the gas meter, and the joint abuts against the pile head of any jacking mechanism of claims 1-7. Here, the end of the pile head can be extended to the inner side of the joint to achieve the subsequent jacking effect on the gas meter.

[0066] The fourth of the present invention:

[0067] A gas meter pressure seal positioning method, comprising:

[0068] 1). The lifting mechanism is connected to the gas meter; here you can refer to the above technical solution and assemble the lifting mechanism as a whole.

[0069] The pile head is connected to the interface of the gas meter;

[0070] The installation steps of the jacking mechanism can be included here: first, place the compression spring and the shoulder II of the screw rod into the opening facing the pile head, then pass the screw plug through the threaded surface of the screw rod abutting the opening, insert the rotating plug of the rotating handle into the adjustment hole, turn the rotating handle to screw the screw plug into the opening, and complete the assembly of the jacking mechanism.

[0071] Then just connect the pile head of the jacking mechanism into the interface of the gas meter.

[0072] 2). The lifting mechanism is connected to the cylinder;

[0073] ITurn the screw rod so that the screw rod thread is tightened on the inner side of the top rod of the cylinder to complete the pressure seal positioning of the gas meter.

[0074] The screw rod here can be rotated in a way that a wrench is used to twist the force-bearing surface of the screw rod. When the screw rod and the pile head pre-work are prepared, the gas meter can be immediately press-sealed. During the sealing process, the elasticity of the compression spring is used to release the pressure of the installation tightening force, thereby reducing the contact surface force between the pile head and the gas meter interface. This can ensure that the pile head is in contact with the interface at any time, and can also perform elastic buffering to a certain extent to avoid excessive pressure and damage to the gas meter.

[0075] The above are only preferred implementations of the present invention. It should be pointed out that a number of modifications and improved technical solutions made by those skilled in the art without departing from the technical solution should also be deemed to fall within the scope of protection required by the claims.

Claims

1. Automatic pressure sealing positioning and lifting mechanism for gas meter, characterized by: It includes a pile head, a compression spring, a screw rod and a screw plug; the pile head body is integrally provided with a shoulder I, the pile head is a hollow structure with an opening at the bottom, and the inner wall of the opening is provided with an internal thread; the screw plug is penetrated by a center hole for facilitating the free movement of the screw rod; the top of the screw rod is integrally provided with a shoulder II, the upper end face of the shoulder II is in contact with one end of the compression spring, and the circumferential surface of the shoulder II cooperates with the opening of the pile head to form a moving pair I; the screw plug passes through the screw rod through the center hole to contact the bottom of the shoulder II, and is threadedly tightened to the opening of the pile head, the other end of the compression spring is in elastic contact with the top wall of the opening, and the lower part of the screw rod cooperates with the circumferential surface of the center hole of the screw plug to form a moving pair II.

2. The automatic pressure-sealing, positioning and lifting mechanism for a gas meter according to claim 1 is characterized in that: The top of the pile head is tapered.

3. The automatic pressure-sealing, positioning and lifting mechanism for a gas meter according to claim 1 is characterized in that: An adjusting hole is provided on the wire plug.

4. The automatic pressure-sealing, positioning and lifting mechanism for a gas meter according to claim 3 is characterized in that: The regulating holes are provided with two and are symmetrically distributed on the plane of the screw plug.

5. The automatic pressure-sealing, positioning and lifting mechanism for a gas meter according to claim 1 is characterized in that: A force bearing surface is provided on the screw rod.

6. The automatic pressure-sealing, positioning and lifting mechanism for a gas meter according to claim 5 is characterized in that: The force-bearing surfaces are located on both sides of the middle part of the screw rod.

7. The automatic pressure-sealing, positioning and lifting mechanism for a gas meter according to claim 1 is characterized in that: The outer surface of the compression spring is coated with anti-rust paint.

8. A gas meter pressure seal positioning structure, characterized in that: It comprises a gas meter and the jacking mechanism described in any one of claims 1 to 7, wherein the gas meter is provided with a joint, and the joint abuts against the pile head of the jacking mechanism.

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